* *
* C Implementation File *
* *
- * $Revision$
- * *
- * Copyright (C) 1992-2001, Free Software Foundation, Inc. *
+ * Copyright (C) 1992-2005, Free Software Foundation, Inc. *
* *
* GNAT is free software; you can redistribute it and/or modify it under *
* terms of the GNU General Public License as published by the Free Soft- *
* MA 02111-1307, USA. *
* *
* GNAT was originally developed by the GNAT team at New York University. *
- * It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). *
+ * Extensive contributions were provided by Ada Core Technologies Inc. *
* *
****************************************************************************/
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
#include "real.h"
#include "flags.h"
+#include "toplev.h"
#include "rtl.h"
#include "expr.h"
#include "ggc.h"
#include "function.h"
+#include "except.h"
#include "debug.h"
#include "output.h"
+#include "tree-gimple.h"
#include "ada.h"
#include "types.h"
#include "atree.h"
/* Current filename without path. */
const char *ref_filename;
-/* Flag indicating whether file names are discarded in exception messages */
-int discard_file_names;
-
/* If true, then gigi is being called on an analyzed but unexpanded
tree, and the only purpose of the call is to properly annotate
types with representation information. */
-int type_annotate_only;
+bool type_annotate_only;
+
+/* A structure used to gather together information about a statement group.
+ We use this to gather related statements, for example the "then" part
+ of a IF. In the case where it represents a lexical scope, we may also
+ have a BLOCK node corresponding to it and/or cleanups. */
+
+struct stmt_group GTY((chain_next ("%h.previous"))) {
+ struct stmt_group *previous; /* Previous code group. */
+ tree stmt_list; /* List of statements for this code group. */
+ tree block; /* BLOCK for this code group, if any. */
+ tree cleanups; /* Cleanups for this code group, if any. */
+};
+
+static GTY(()) struct stmt_group *current_stmt_group;
+
+/* List of unused struct stmt_group nodes. */
+static GTY((deletable)) struct stmt_group *stmt_group_free_list;
+
+/* A structure used to record information on elaboration procedures
+ we've made and need to process.
+
+ ??? gnat_node should be Node_Id, but gengtype gets confused. */
-/* List of TREE_LIST nodes representing a block stack. TREE_VALUE
- of each gives the variable used for the setjmp buffer in the current
- block, if any. TREE_PURPOSE gives the bottom condition for a loop,
- if this block is for a loop. The latter is only used to save the tree
- over GC. */
-tree gnu_block_stack;
+struct elab_info GTY((chain_next ("%h.next"))) {
+ struct elab_info *next; /* Pointer to next in chain. */
+ tree elab_proc; /* Elaboration procedure. */
+ int gnat_node; /* The N_Compilation_Unit. */
+};
+
+static GTY(()) struct elab_info *elab_info_list;
+
+/* Free list of TREE_LIST nodes used for stacks. */
+static GTY((deletable)) tree gnu_stack_free_list;
/* List of TREE_LIST nodes representing a stack of exception pointer
variables. TREE_VALUE is the VAR_DECL that stores the address of
the raised exception. Nonzero means we are in an exception
- handler. Set to error_mark_node in the zero-cost case. */
-static tree gnu_except_ptr_stack;
+ handler. Not used in the zero-cost case. */
+static GTY(()) tree gnu_except_ptr_stack;
+
+/* List of TREE_LIST nodes used to store the current elaboration procedure
+ decl. TREE_VALUE is the decl. */
+static GTY(()) tree gnu_elab_proc_stack;
+
+/* Variable that stores a list of labels to be used as a goto target instead of
+ a return in some functions. See processing for N_Subprogram_Body. */
+static GTY(()) tree gnu_return_label_stack;
+
+/* List of TREE_LIST nodes representing a stack of LOOP_STMT nodes.
+ TREE_VALUE of each entry is the label of the corresponding LOOP_STMT. */
+static GTY(()) tree gnu_loop_label_stack;
+
+/* List of TREE_LIST nodes representing labels for switch statements.
+ TREE_VALUE of each entry is the label at the end of the switch. */
+static GTY(()) tree gnu_switch_label_stack;
/* Map GNAT tree codes to GCC tree codes for simple expressions. */
static enum tree_code gnu_codes[Number_Node_Kinds];
-/* Current node being treated, in case gigi_abort called. */
+/* Current node being treated, in case abort called. */
Node_Id error_gnat_node;
-/* Variable that stores a list of labels to be used as a goto target instead of
- a return in some functions. See processing for N_Subprogram_Body. */
-static tree gnu_return_label_stack;
-
-static tree tree_transform PARAMS((Node_Id));
-static void elaborate_all_entities PARAMS((Node_Id));
-static void process_freeze_entity PARAMS((Node_Id));
-static void process_inlined_subprograms PARAMS((Node_Id));
-static void process_decls PARAMS((List_Id, List_Id, Node_Id,
- int, int));
-static tree emit_access_check PARAMS((tree));
-static tree emit_discriminant_check PARAMS((tree, Node_Id));
-static tree emit_range_check PARAMS((tree, Node_Id));
-static tree emit_index_check PARAMS((tree, tree, tree, tree));
-static tree emit_check PARAMS((tree, tree));
-static tree convert_with_check PARAMS((Entity_Id, tree,
- int, int, int));
-static int addressable_p PARAMS((tree));
-static tree assoc_to_constructor PARAMS((Node_Id, tree));
-static tree extract_values PARAMS((tree, tree));
-static tree pos_to_constructor PARAMS((Node_Id, tree, Entity_Id));
-static tree maybe_implicit_deref PARAMS((tree));
-static tree gnat_stabilize_reference_1 PARAMS((tree, int));
-static int build_unit_elab PARAMS((Entity_Id, int, tree));
-
-/* Constants for +0.5 and -0.5 for float-to-integer rounding. */
-static REAL_VALUE_TYPE dconstp5;
-static REAL_VALUE_TYPE dconstmp5;
+static void Compilation_Unit_to_gnu (Node_Id);
+static void record_code_position (Node_Id);
+static void insert_code_for (Node_Id);
+static void start_stmt_group (void);
+static void add_cleanup (tree);
+static tree mark_visited (tree *, int *, void *);
+static tree mark_unvisited (tree *, int *, void *);
+static tree end_stmt_group (void);
+static void add_stmt_list (List_Id);
+static tree build_stmt_group (List_Id, bool);
+static void push_stack (tree *, tree, tree);
+static void pop_stack (tree *);
+static enum gimplify_status gnat_gimplify_stmt (tree *);
+static void elaborate_all_entities (Node_Id);
+static void process_freeze_entity (Node_Id);
+static void process_inlined_subprograms (Node_Id);
+static void process_decls (List_Id, List_Id, Node_Id, bool, bool);
+static tree emit_range_check (tree, Node_Id);
+static tree emit_index_check (tree, tree, tree, tree);
+static tree emit_check (tree, tree, int);
+static tree convert_with_check (Entity_Id, tree, bool, bool, bool);
+static bool addressable_p (tree);
+static tree assoc_to_constructor (Node_Id, tree);
+static tree extract_values (tree, tree);
+static tree pos_to_constructor (Node_Id, tree, Entity_Id);
+static tree maybe_implicit_deref (tree);
+static tree gnat_stabilize_reference_1 (tree, bool);
+static void annotate_with_node (tree, Node_Id);
+
\f
/* This is the main program of the back-end. It sets up all the table
structures and then generates code. */
void
-gigi (gnat_root, max_gnat_node, number_name,
- nodes_ptr, next_node_ptr, prev_node_ptr, elists_ptr, elmts_ptr,
- strings_ptr, string_chars_ptr, list_headers_ptr,
- number_units, file_info_ptr,
- standard_integer, standard_long_long_float, standard_exception_type,
- gigi_operating_mode)
-
- Node_Id gnat_root;
- int max_gnat_node;
- int number_name;
-
- struct Node *nodes_ptr;
- Node_Id *next_node_ptr;
- Node_Id *prev_node_ptr;
- struct Elist_Header *elists_ptr;
- struct Elmt_Item *elmts_ptr;
- struct String_Entry *strings_ptr;
- Char_Code *string_chars_ptr;
- struct List_Header *list_headers_ptr;
- Int number_units ATTRIBUTE_UNUSED;
- char *file_info_ptr ATTRIBUTE_UNUSED;
-
- Entity_Id standard_integer;
- Entity_Id standard_long_long_float;
- Entity_Id standard_exception_type;
-
- Int gigi_operating_mode;
+gigi (Node_Id gnat_root, int max_gnat_node, int number_name,
+ struct Node *nodes_ptr, Node_Id *next_node_ptr, Node_Id *prev_node_ptr,
+ struct Elist_Header *elists_ptr, struct Elmt_Item *elmts_ptr,
+ struct String_Entry *strings_ptr, Char_Code *string_chars_ptr,
+ struct List_Header *list_headers_ptr, Int number_units ATTRIBUTE_UNUSED,
+ char *file_info_ptr ATTRIBUTE_UNUSED, Entity_Id standard_integer,
+ Entity_Id standard_long_long_float, Entity_Id standard_exception_type,
+ Int gigi_operating_mode)
{
+ tree gnu_standard_long_long_float;
+ tree gnu_standard_exception_type;
+ struct elab_info *info;
+
max_gnat_nodes = max_gnat_node;
number_names = number_name;
- Nodes_Ptr = nodes_ptr - First_Node_Id;
- Next_Node_Ptr = next_node_ptr - First_Node_Id;
- Prev_Node_Ptr = prev_node_ptr - First_Node_Id;
- Elists_Ptr = elists_ptr - First_Elist_Id;
- Elmts_Ptr = elmts_ptr - First_Elmt_Id;
- Strings_Ptr = strings_ptr - First_String_Id;
+ Nodes_Ptr = nodes_ptr;
+ Next_Node_Ptr = next_node_ptr;
+ Prev_Node_Ptr = prev_node_ptr;
+ Elists_Ptr = elists_ptr;
+ Elmts_Ptr = elmts_ptr;
+ Strings_Ptr = strings_ptr;
String_Chars_Ptr = string_chars_ptr;
- List_Headers_Ptr = list_headers_ptr - First_List_Id;
+ List_Headers_Ptr = list_headers_ptr;
type_annotate_only = (gigi_operating_mode == 1);
- /* See if we should discard file names in exception messages. */
- discard_file_names = (Global_Discard_Names || Debug_Flag_NN);
-
- if (Nkind (gnat_root) != N_Compilation_Unit)
- gigi_abort (301);
-
- set_lineno (gnat_root, 0);
-
- /* Initialize ourselves. */
init_gnat_to_gnu ();
+ gnat_compute_largest_alignment ();
init_dummy_type ();
- init_code_table ();
- /* Enable GNAT stack checking method if needed */
- if (!Stack_Check_Probes_On_Target)
- set_stack_check_libfunc (gen_rtx (SYMBOL_REF, Pmode, "_gnat_stack_check"));
+ /* If we are just annotating types, give VOID_TYPE zero sizes to avoid
+ errors. */
+ if (type_annotate_only)
+ {
+ TYPE_SIZE (void_type_node) = bitsize_zero_node;
+ TYPE_SIZE_UNIT (void_type_node) = size_zero_node;
+ }
/* Save the type we made for integer as the type for Standard.Integer.
Then make the rest of the standard types. Note that some of these
may be subtypes. */
- save_gnu_tree (Base_Type (standard_integer),
- TYPE_NAME (integer_type_node), 0);
+ save_gnu_tree (Base_Type (standard_integer), TYPE_NAME (integer_type_node),
+ false);
- ggc_add_tree_root (&gnu_block_stack, 1);
- ggc_add_tree_root (&gnu_except_ptr_stack, 1);
- ggc_add_tree_root (&gnu_return_label_stack, 1);
gnu_except_ptr_stack = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE);
- dconstp5 = REAL_VALUE_ATOF ("0.5", DFmode);
- dconstmp5 = REAL_VALUE_ATOF ("-0.5", DFmode);
+ gnu_standard_long_long_float
+ = gnat_to_gnu_entity (Base_Type (standard_long_long_float), NULL_TREE, 0);
+ gnu_standard_exception_type
+ = gnat_to_gnu_entity (Base_Type (standard_exception_type), NULL_TREE, 0);
- init_gigi_decls (gnat_to_gnu_entity (Base_Type (standard_long_long_float),
- NULL_TREE, 0),
- gnat_to_gnu_entity (Base_Type (standard_exception_type),
- NULL_TREE, 0));
-
- /* Emit global symbols containing context list info for the SGI Workshop
- debugger */
-
-#ifdef MIPS_DEBUGGING_INFO
- if (Spec_Context_List != 0)
- emit_unit_label (Spec_Context_List, Spec_Filename);
-
- if (Body_Context_List != 0)
- emit_unit_label (Body_Context_List, Body_Filename);
-#endif
+ init_gigi_decls (gnu_standard_long_long_float, gnu_standard_exception_type);
+ /* Process any Pragma Ident for the main unit. */
#ifdef ASM_OUTPUT_IDENT
if (Present (Ident_String (Main_Unit)))
ASM_OUTPUT_IDENT
TREE_STRING_POINTER (gnat_to_gnu (Ident_String (Main_Unit))));
#endif
- gnat_to_code (gnat_root);
-}
+ /* If we are using the GCC exception mechanism, let GCC know. */
+ if (Exception_Mechanism == GCC_ZCX)
+ gnat_init_gcc_eh ();
+
+ gcc_assert (Nkind (gnat_root) == N_Compilation_Unit);
+ Compilation_Unit_to_gnu (gnat_root);
+ /* Now see if we have any elaboration procedures to deal with. */
+ for (info = elab_info_list; info; info = info->next)
+ {
+ tree gnu_body = DECL_SAVED_TREE (info->elab_proc);
+ tree gnu_stmts;
+
+ /* Mark everything we have as not visited. */
+ walk_tree_without_duplicates (&gnu_body, mark_unvisited, NULL);
+
+ /* Set the current function to be the elaboration procedure and gimplify
+ what we have. */
+ current_function_decl = info->elab_proc;
+ gimplify_body (&gnu_body, info->elab_proc, true);
+
+ /* We should have a BIND_EXPR, but it may or may not have any statements
+ in it. If it doesn't have any, we have nothing to do. */
+ gnu_stmts = gnu_body;
+ if (TREE_CODE (gnu_stmts) == BIND_EXPR)
+ gnu_stmts = BIND_EXPR_BODY (gnu_stmts);
+
+ /* If there are no statements, there is no elaboration code. */
+ if (!gnu_stmts || !STATEMENT_LIST_HEAD (gnu_stmts))
+ Set_Has_No_Elaboration_Code (info->gnat_node, 1);
+ else
+ {
+ /* Otherwise, compile the function. Note that we'll be gimplifying
+ it twice, but that's fine for the nodes we use. */
+ begin_subprog_body (info->elab_proc);
+ end_subprog_body (gnu_body);
+ }
+ }
+}
\f
-/* This function is the driver of the GNAT to GCC tree transformation process.
- GNAT_NODE is the root of some gnat tree. It generates code for that
- part of the tree. */
+/* Perform initializations for this module. */
void
-gnat_to_code (gnat_node)
- Node_Id gnat_node;
+gnat_init_stmt_group ()
{
- tree gnu_root;
-
- /* Save node number in case error */
- error_gnat_node = gnat_node;
+ /* Initialize ourselves. */
+ init_code_table ();
+ start_stmt_group ();
- gnu_root = tree_transform (gnat_node);
+ /* Enable GNAT stack checking method if needed */
+ if (!Stack_Check_Probes_On_Target)
+ set_stack_check_libfunc (gen_rtx_SYMBOL_REF (Pmode, "_gnat_stack_check"));
- /* This should just generate code, not return a value. If it returns
- a value, something is wrong. */
- if (gnu_root != error_mark_node)
- gigi_abort (302);
+ gcc_assert (Exception_Mechanism != Front_End_ZCX);
}
+\f
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Identifier,
+ to a GCC tree, which is returned. GNU_RESULT_TYPE_P is a pointer to
+ where we should place the result type. */
-/* GNAT_NODE is the root of some GNAT tree. Return the root of the GCC
- tree corresponding to that GNAT tree. Normally, no code is generated.
- We just return an equivalent tree which is used elsewhere to generate
- code. */
-
-tree
-gnat_to_gnu (gnat_node)
- Node_Id gnat_node;
+static tree
+Identifier_to_gnu (Node_Id gnat_node, tree *gnu_result_type_p)
{
- tree gnu_root;
+ tree gnu_result_type;
+ tree gnu_result;
+ Node_Id gnat_temp, gnat_temp_type;
+
+ /* If the Etype of this node does not equal the Etype of the Entity,
+ something is wrong with the entity map, probably in generic
+ instantiation. However, this does not apply to types. Since we sometime
+ have strange Ekind's, just do this test for objects. Also, if the Etype of
+ the Entity is private, the Etype of the N_Identifier is allowed to be the
+ full type and also we consider a packed array type to be the same as the
+ original type. Similarly, a class-wide type is equivalent to a subtype of
+ itself. Finally, if the types are Itypes, one may be a copy of the other,
+ which is also legal. */
+ gnat_temp = (Nkind (gnat_node) == N_Defining_Identifier
+ ? gnat_node : Entity (gnat_node));
+ gnat_temp_type = Etype (gnat_temp);
+
+ gcc_assert (Etype (gnat_node) == gnat_temp_type
+ || (Is_Packed (gnat_temp_type)
+ && Etype (gnat_node) == Packed_Array_Type (gnat_temp_type))
+ || (Is_Class_Wide_Type (Etype (gnat_node)))
+ || (IN (Ekind (gnat_temp_type), Private_Kind)
+ && Present (Full_View (gnat_temp_type))
+ && ((Etype (gnat_node) == Full_View (gnat_temp_type))
+ || (Is_Packed (Full_View (gnat_temp_type))
+ && (Etype (gnat_node)
+ == Packed_Array_Type (Full_View
+ (gnat_temp_type))))))
+ || (Is_Itype (Etype (gnat_node)) && Is_Itype (gnat_temp_type))
+ || !(Ekind (gnat_temp) == E_Variable
+ || Ekind (gnat_temp) == E_Component
+ || Ekind (gnat_temp) == E_Constant
+ || Ekind (gnat_temp) == E_Loop_Parameter
+ || IN (Ekind (gnat_temp), Formal_Kind)));
+
+ /* If this is a reference to a deferred constant whose partial view is an
+ unconstrained private type, the proper type is on the full view of the
+ constant, not on the full view of the type, which may be unconstrained.
+
+ This may be a reference to a type, for example in the prefix of the
+ attribute Position, generated for dispatching code (see Make_DT in
+ exp_disp,adb). In that case we need the type itself, not is parent,
+ in particular if it is a derived type */
+ if (Is_Private_Type (gnat_temp_type)
+ && Has_Unknown_Discriminants (gnat_temp_type)
+ && Present (Full_View (gnat_temp))
+ && !Is_Type (gnat_temp))
+ {
+ gnat_temp = Full_View (gnat_temp);
+ gnat_temp_type = Etype (gnat_temp);
+ gnu_result_type = get_unpadded_type (gnat_temp_type);
+ }
+ else
+ {
+ /* Expand the type of this identifier first, in case it is an enumeral
+ literal, which only get made when the type is expanded. There is no
+ order-of-elaboration issue here. We want to use the Actual_Subtype if
+ it has already been elaborated, otherwise the Etype. Avoid using
+ Actual_Subtype for packed arrays to simplify things. */
+ if ((Ekind (gnat_temp) == E_Constant
+ || Ekind (gnat_temp) == E_Variable || Is_Formal (gnat_temp))
+ && !(Is_Array_Type (Etype (gnat_temp))
+ && Present (Packed_Array_Type (Etype (gnat_temp))))
+ && Present (Actual_Subtype (gnat_temp))
+ && present_gnu_tree (Actual_Subtype (gnat_temp)))
+ gnat_temp_type = Actual_Subtype (gnat_temp);
+ else
+ gnat_temp_type = Etype (gnat_node);
- /* Save node number in case error */
- error_gnat_node = gnat_node;
+ gnu_result_type = get_unpadded_type (gnat_temp_type);
+ }
+
+ gnu_result = gnat_to_gnu_entity (gnat_temp, NULL_TREE, 0);
+
+ /* If we are in an exception handler, force this variable into memory to
+ ensure optimization does not remove stores that appear redundant but are
+ actually needed in case an exception occurs.
+
+ ??? Note that we need not do this if the variable is declared within the
+ handler, only if it is referenced in the handler and declared in an
+ enclosing block, but we have no way of testing that right now.
+
+ ??? Also, for now all we can do is make it volatile. But we only
+ do this for SJLJ. */
+ if (TREE_VALUE (gnu_except_ptr_stack)
+ && TREE_CODE (gnu_result) == VAR_DECL)
+ TREE_THIS_VOLATILE (gnu_result) = TREE_SIDE_EFFECTS (gnu_result) = 1;
+
+ /* Some objects (such as parameters passed by reference, globals of
+ variable size, and renamed objects) actually represent the address
+ of the object. In that case, we must do the dereference. Likewise,
+ deal with parameters to foreign convention subprograms. Call fold
+ here since GNU_RESULT may be a CONST_DECL. */
+ if (DECL_P (gnu_result)
+ && (DECL_BY_REF_P (gnu_result)
+ || (TREE_CODE (gnu_result) == PARM_DECL
+ && DECL_BY_COMPONENT_PTR_P (gnu_result))))
+ {
+ bool ro = DECL_POINTS_TO_READONLY_P (gnu_result);
+ tree renamed_obj;
+
+ if (TREE_CODE (gnu_result) == PARM_DECL
+ && DECL_BY_COMPONENT_PTR_P (gnu_result))
+ gnu_result
+ = build_unary_op (INDIRECT_REF, NULL_TREE,
+ convert (build_pointer_type (gnu_result_type),
+ gnu_result));
+
+ /* If it's a renaming pointer and we are at the right binding level,
+ we can reference the renamed object directly, since the renamed
+ expression has been protected against multiple evaluations. */
+ else if (TREE_CODE (gnu_result) == VAR_DECL
+ && (renamed_obj = DECL_RENAMED_OBJECT (gnu_result)) != 0
+ && (! DECL_RENAMING_GLOBAL_P (gnu_result)
+ || global_bindings_p ())
+ /* Make sure it's an lvalue like INDIRECT_REF. */
+ && (DECL_P (renamed_obj) || REFERENCE_CLASS_P (renamed_obj)))
+ gnu_result = renamed_obj;
+ else
+ gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE,
+ fold (gnu_result));
- gnu_root = tree_transform (gnat_node);
+ TREE_READONLY (gnu_result) = TREE_STATIC (gnu_result) = ro;
+ }
+
+ /* The GNAT tree has the type of a function as the type of its result. Also
+ use the type of the result if the Etype is a subtype which is nominally
+ unconstrained. But remove any padding from the resulting type. */
+ if (TREE_CODE (TREE_TYPE (gnu_result)) == FUNCTION_TYPE
+ || Is_Constr_Subt_For_UN_Aliased (gnat_temp_type))
+ {
+ gnu_result_type = TREE_TYPE (gnu_result);
+ if (TREE_CODE (gnu_result_type) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (gnu_result_type))
+ gnu_result_type = TREE_TYPE (TYPE_FIELDS (gnu_result_type));
+ }
- /* If we got no code as a result, something is wrong. */
- if (gnu_root == error_mark_node && ! type_annotate_only)
- gigi_abort (303);
+ /* We always want to return the underlying INTEGER_CST for an enumeration
+ literal to avoid the need to call fold in lots of places. But don't do
+ this is the parent will be taking the address of this object. */
+ if (TREE_CODE (gnu_result) == CONST_DECL)
+ {
+ gnat_temp = Parent (gnat_node);
+ if (!DECL_CONST_CORRESPONDING_VAR (gnu_result)
+ || (Nkind (gnat_temp) != N_Reference
+ && !(Nkind (gnat_temp) == N_Attribute_Reference
+ && ((Get_Attribute_Id (Attribute_Name (gnat_temp))
+ == Attr_Address)
+ || (Get_Attribute_Id (Attribute_Name (gnat_temp))
+ == Attr_Access)
+ || (Get_Attribute_Id (Attribute_Name (gnat_temp))
+ == Attr_Unchecked_Access)
+ || (Get_Attribute_Id (Attribute_Name (gnat_temp))
+ == Attr_Unrestricted_Access)))))
+ gnu_result = DECL_INITIAL (gnu_result);
+ }
- return gnu_root;
+ *gnu_result_type_p = gnu_result_type;
+ return gnu_result;
}
\f
-/* This function is the driver of the GNAT to GCC tree transformation process.
- It is the entry point of the tree transformer. GNAT_NODE is the root of
- some GNAT tree. Return the root of the corresponding GCC tree or
- error_mark_node to signal that there is no GCC tree to return.
-
- The latter is the case if only code generation actions have to be performed
- like in the case of if statements, loops, etc. This routine is wrapped
- in the above two routines for most purposes. */
+/* Subroutine of gnat_to_gnu to process gnat_node, an N_Pragma. Return
+ any statements we generate. */
static tree
-tree_transform (gnat_node)
- Node_Id gnat_node;
+Pragma_to_gnu (Node_Id gnat_node)
{
- tree gnu_result = error_mark_node; /* Default to no value. */
- tree gnu_result_type = void_type_node;
- tree gnu_expr;
- tree gnu_lhs, gnu_rhs;
Node_Id gnat_temp;
- Entity_Id gnat_temp_type;
+ tree gnu_result = alloc_stmt_list ();
- /* Set input_file_name and lineno from the Sloc in the GNAT tree. */
- set_lineno (gnat_node, 0);
+ /* Check for (and ignore) unrecognized pragma and do nothing if we are just
+ annotating types. */
+ if (type_annotate_only || !Is_Pragma_Name (Chars (gnat_node)))
+ return gnu_result;
- /* If this is a Statement and we are at top level, we add the statement
- as an elaboration for a null tree. That will cause it to be placed
- in the elaboration procedure. */
- if (global_bindings_p ()
- && ((IN (Nkind (gnat_node), N_Statement_Other_Than_Procedure_Call)
- && Nkind (gnat_node) != N_Null_Statement)
- || Nkind (gnat_node) == N_Procedure_Call_Statement
- || Nkind (gnat_node) == N_Label
- || (Nkind (gnat_node) == N_Handled_Sequence_Of_Statements
- && (Present (Exception_Handlers (gnat_node))
- || Present (At_End_Proc (gnat_node))))
- || ((Nkind (gnat_node) == N_Raise_Constraint_Error
- || Nkind (gnat_node) == N_Raise_Storage_Error
- || Nkind (gnat_node) == N_Raise_Program_Error)
- && (Ekind (Etype (gnat_node)) == E_Void))))
+ switch (Get_Pragma_Id (Chars (gnat_node)))
{
- add_pending_elaborations (NULL_TREE, make_transform_expr (gnat_node));
+ case Pragma_Inspection_Point:
+ /* Do nothing at top level: all such variables are already viewable. */
+ if (global_bindings_p ())
+ break;
- return error_mark_node;
+ for (gnat_temp = First (Pragma_Argument_Associations (gnat_node));
+ Present (gnat_temp);
+ gnat_temp = Next (gnat_temp))
+ {
+ tree gnu_expr = gnat_to_gnu (Expression (gnat_temp));
+
+ if (TREE_CODE (gnu_expr) == UNCONSTRAINED_ARRAY_REF)
+ gnu_expr = TREE_OPERAND (gnu_expr, 0);
+
+ gnu_expr = build1 (USE_STMT, void_type_node, gnu_expr);
+ annotate_with_node (gnu_expr, gnat_node);
+ append_to_statement_list (gnu_expr, &gnu_result);
+ }
+ break;
+
+ case Pragma_Optimize:
+ switch (Chars (Expression
+ (First (Pragma_Argument_Associations (gnat_node)))))
+ {
+ case Name_Time: case Name_Space:
+ if (optimize == 0)
+ post_error ("insufficient -O value?", gnat_node);
+ break;
+
+ case Name_Off:
+ if (optimize != 0)
+ post_error ("must specify -O0?", gnat_node);
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ break;
+
+ case Pragma_Reviewable:
+ if (write_symbols == NO_DEBUG)
+ post_error ("must specify -g?", gnat_node);
+ break;
}
- /* If this node is a non-static subexpression and we are only
- annotating types, make this into a NULL_EXPR for non-VOID types
- and error_mark_node for void return types. But allow
- N_Identifier since we use it for lots of things, including
- getting trees for discriminants. */
+ return gnu_result;
+}
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Attribute,
+ to a GCC tree, which is returned. GNU_RESULT_TYPE_P is a pointer to
+ where we should place the result type. ATTRIBUTE is the attribute ID. */
- if (type_annotate_only
- && IN (Nkind (gnat_node), N_Subexpr)
- && Nkind (gnat_node) != N_Identifier
- && ! Compile_Time_Known_Value (gnat_node))
- {
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
+static tree
+Attribute_to_gnu (Node_Id gnat_node, tree *gnu_result_type_p, int attribute)
+{
+ tree gnu_result = error_mark_node;
+ tree gnu_result_type;
+ tree gnu_expr;
+ bool prefix_unused = false;
+ tree gnu_prefix = gnat_to_gnu (Prefix (gnat_node));
+ tree gnu_type = TREE_TYPE (gnu_prefix);
- if (TREE_CODE (gnu_result_type) == VOID_TYPE)
- return error_mark_node;
- else
- return build1 (NULL_EXPR, gnu_result_type,
- build_call_raise (raise_constraint_error_decl));
+ /* If the input is a NULL_EXPR, make a new one. */
+ if (TREE_CODE (gnu_prefix) == NULL_EXPR)
+ {
+ *gnu_result_type_p = get_unpadded_type (Etype (gnat_node));
+ return build1 (NULL_EXPR, *gnu_result_type_p,
+ TREE_OPERAND (gnu_prefix, 0));
}
- switch (Nkind (gnat_node))
+ switch (attribute)
{
- /********************************/
- /* Chapter 2: Lexical Elements: */
- /********************************/
+ case Attr_Pos:
+ case Attr_Val:
+ /* These are just conversions until since representation clauses for
+ enumerations are handled in the front end. */
+ {
+ bool checkp = Do_Range_Check (First (Expressions (gnat_node)));
- case N_Identifier:
- case N_Expanded_Name:
- case N_Operator_Symbol:
- case N_Defining_Identifier:
+ gnu_result = gnat_to_gnu (First (Expressions (gnat_node)));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result = convert_with_check (Etype (gnat_node), gnu_result,
+ checkp, checkp, true);
+ }
+ break;
- /* If the Etype of this node does not equal the Etype of the
- Entity, something is wrong with the entity map, probably in
- generic instantiation. However, this does not apply to
- types. Since we sometime have strange Ekind's, just do
- this test for objects. Also, if the Etype of the Entity
- is private, the Etype of the N_Identifier is allowed to be the
- full type and also we consider a packed array type to be the
- same as the original type. Finally, if the types are Itypes,
- one may be a copy of the other, which is also legal. */
-
- gnat_temp = (Nkind (gnat_node) == N_Defining_Identifier
- ? gnat_node : Entity (gnat_node));
- gnat_temp_type = Etype (gnat_temp);
+ case Attr_Pred:
+ case Attr_Succ:
+ /* These just add or subject the constant 1. Representation clauses for
+ enumerations are handled in the front-end. */
+ gnu_expr = gnat_to_gnu (First (Expressions (gnat_node)));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
- if (Etype (gnat_node) != gnat_temp_type
- && ! (Is_Packed (gnat_temp_type)
- && Etype (gnat_node) == Packed_Array_Type (gnat_temp_type))
- && ! (IN (Ekind (gnat_temp_type), Private_Kind)
- && Present (Full_View (gnat_temp_type))
- && ((Etype (gnat_node) == Full_View (gnat_temp_type))
- || (Is_Packed (Full_View (gnat_temp_type))
- && Etype (gnat_node) ==
- Packed_Array_Type (Full_View (gnat_temp_type)))))
- && (!Is_Itype (Etype (gnat_node)) || !Is_Itype (gnat_temp_type))
- && (Ekind (gnat_temp) == E_Variable
- || Ekind (gnat_temp) == E_Component
- || Ekind (gnat_temp) == E_Constant
- || Ekind (gnat_temp) == E_Loop_Parameter
- || IN (Ekind (gnat_temp), Formal_Kind)))
- gigi_abort (304);
-
- /* If this is a reference to a deferred constant whose partial view
- is an unconstrained private type, the proper type is on the full
- view of the constant, not on the full view of the type, which may
- be unconstrained.
-
- This may be a reference to a type, for example in the prefix of the
- attribute Position, generated for dispatching code (see Make_DT in
- exp_disp,adb). In that case we need the type itself, not is parent,
- in particular if it is a derived type */
-
- if (Is_Private_Type (gnat_temp_type)
- && Has_Unknown_Discriminants (gnat_temp_type)
- && Present (Full_View (gnat_temp))
- && ! Is_Type (gnat_temp))
+ if (Do_Range_Check (First (Expressions (gnat_node))))
{
- gnat_temp = Full_View (gnat_temp);
- gnat_temp_type = Etype (gnat_temp);
- gnu_result_type = get_unpadded_type (gnat_temp_type);
+ gnu_expr = protect_multiple_eval (gnu_expr);
+ gnu_expr
+ = emit_check
+ (build_binary_op (EQ_EXPR, integer_type_node,
+ gnu_expr,
+ attribute == Attr_Pred
+ ? TYPE_MIN_VALUE (gnu_result_type)
+ : TYPE_MAX_VALUE (gnu_result_type)),
+ gnu_expr, CE_Range_Check_Failed);
}
- else
- {
- /* Expand the type of this identitier first, in case it is
- an enumeral literal, which only get made when the type
- is expanded. There is no order-of-elaboration issue here.
- We want to use the Actual_Subtype if it has already been
- elaborated, otherwise the Etype. Avoid using Actual_Subtype
- for packed arrays to simplify things. */
- if ((Ekind (gnat_temp) == E_Constant
- || Ekind (gnat_temp) == E_Variable || Is_Formal (gnat_temp))
- && ! (Is_Array_Type (Etype (gnat_temp))
- && Present (Packed_Array_Type (Etype (gnat_temp))))
- && Present (Actual_Subtype (gnat_temp))
- && present_gnu_tree (Actual_Subtype (gnat_temp)))
- gnat_temp_type = Actual_Subtype (gnat_temp);
- else
- gnat_temp_type = Etype (gnat_node);
- gnu_result_type = get_unpadded_type (gnat_temp_type);
- }
+ gnu_result
+ = build_binary_op (attribute == Attr_Pred
+ ? MINUS_EXPR : PLUS_EXPR,
+ gnu_result_type, gnu_expr,
+ convert (gnu_result_type, integer_one_node));
+ break;
+
+ case Attr_Address:
+ case Attr_Unrestricted_Access:
+ /* Conversions don't change something's address but can cause us to miss
+ the COMPONENT_REF case below, so strip them off. */
+ gnu_prefix = remove_conversions (gnu_prefix,
+ !Must_Be_Byte_Aligned (gnat_node));
- gnu_result = gnat_to_gnu_entity (gnat_temp, NULL_TREE, 0);
+ /* If we are taking 'Address of an unconstrained object, this is the
+ pointer to the underlying array. */
+ gnu_prefix = maybe_unconstrained_array (gnu_prefix);
- /* If we are in an exception handler, force this variable into memory
- to ensure optimization does not remove stores that appear
- redundant but are actually needed in case an exception occurs.
+ /* ... fall through ... */
- ??? Note that we need not do this if the variable is declared within
- the handler, only if it is referenced in the handler and declared
- in an enclosing block, but we have no way of testing that
- right now. */
- if (TREE_VALUE (gnu_except_ptr_stack) != 0)
+ case Attr_Access:
+ case Attr_Unchecked_Access:
+ case Attr_Code_Address:
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result
+ = build_unary_op (((attribute == Attr_Address
+ || attribute == Attr_Unrestricted_Access)
+ && !Must_Be_Byte_Aligned (gnat_node))
+ ? ATTR_ADDR_EXPR : ADDR_EXPR,
+ gnu_result_type, gnu_prefix);
+
+ /* For 'Code_Address, find an inner ADDR_EXPR and mark it so that we
+ don't try to build a trampoline. */
+ if (attribute == Attr_Code_Address)
{
- mark_addressable (gnu_result);
- flush_addressof (gnu_result);
+ for (gnu_expr = gnu_result;
+ TREE_CODE (gnu_expr) == NOP_EXPR
+ || TREE_CODE (gnu_expr) == CONVERT_EXPR;
+ gnu_expr = TREE_OPERAND (gnu_expr, 0))
+ TREE_CONSTANT (gnu_expr) = 1;
+
+ if (TREE_CODE (gnu_expr) == ADDR_EXPR)
+ TREE_STATIC (gnu_expr) = TREE_CONSTANT (gnu_expr) = 1;
}
+ break;
- /* Some objects (such as parameters passed by reference, globals of
- variable size, and renamed objects) actually represent the address
- of the object. In that case, we must do the dereference. Likewise,
- deal with parameters to foreign convention subprograms. Call fold
- here since GNU_RESULT may be a CONST_DECL. */
- if (DECL_P (gnu_result)
- && (DECL_BY_REF_P (gnu_result)
- || DECL_BY_COMPONENT_PTR_P (gnu_result)))
- {
- int ro = DECL_POINTS_TO_READONLY_P (gnu_result);
+ case Attr_Pool_Address:
+ {
+ tree gnu_obj_type;
+ tree gnu_ptr = gnu_prefix;
- if (DECL_BY_COMPONENT_PTR_P (gnu_result))
- gnu_result = convert (build_pointer_type (gnu_result_type),
- gnu_result);
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE,
- fold (gnu_result));
- TREE_READONLY (gnu_result) = TREE_STATIC (gnu_result) = ro;
- }
+ /* If this is an unconstrained array, we know the object must have been
+ allocated with the template in front of the object. So compute the
+ template address.*/
+ if (TYPE_FAT_POINTER_P (TREE_TYPE (gnu_ptr)))
+ gnu_ptr
+ = convert (build_pointer_type
+ (TYPE_OBJECT_RECORD_TYPE
+ (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (gnu_ptr)))),
+ gnu_ptr);
+
+ gnu_obj_type = TREE_TYPE (TREE_TYPE (gnu_ptr));
+ if (TREE_CODE (gnu_obj_type) == RECORD_TYPE
+ && TYPE_CONTAINS_TEMPLATE_P (gnu_obj_type))
+ {
+ tree gnu_char_ptr_type = build_pointer_type (char_type_node);
+ tree gnu_pos = byte_position (TYPE_FIELDS (gnu_obj_type));
+ tree gnu_byte_offset
+ = convert (gnu_char_ptr_type,
+ size_diffop (size_zero_node, gnu_pos));
+
+ gnu_ptr = convert (gnu_char_ptr_type, gnu_ptr);
+ gnu_ptr = build_binary_op (MINUS_EXPR, gnu_char_ptr_type,
+ gnu_ptr, gnu_byte_offset);
+ }
- /* The GNAT tree has the type of a function as the type of its result.
- Also use the type of the result if the Etype is a subtype which
- is nominally unconstrained. But remove any padding from the
- resulting type. */
- if (TREE_CODE (TREE_TYPE (gnu_result)) == FUNCTION_TYPE
- || Is_Constr_Subt_For_UN_Aliased (gnat_temp_type))
+ gnu_result = convert (gnu_result_type, gnu_ptr);
+ }
+ break;
+
+ case Attr_Size:
+ case Attr_Object_Size:
+ case Attr_Value_Size:
+ case Attr_Max_Size_In_Storage_Elements:
+ gnu_expr = gnu_prefix;
+
+ /* Remove NOPS from gnu_expr and conversions from gnu_prefix.
+ We only use GNU_EXPR to see if a COMPONENT_REF was involved. */
+ while (TREE_CODE (gnu_expr) == NOP_EXPR)
+ gnu_expr = TREE_OPERAND (gnu_expr, 0)
+ ;
+
+ gnu_prefix = remove_conversions (gnu_prefix, true);
+ prefix_unused = true;
+ gnu_type = TREE_TYPE (gnu_prefix);
+
+ /* Replace an unconstrained array type with the type of the underlying
+ array. We can't do this with a call to maybe_unconstrained_array
+ since we may have a TYPE_DECL. For 'Max_Size_In_Storage_Elements,
+ use the record type that will be used to allocate the object and its
+ template. */
+ if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE)
{
- gnu_result_type = TREE_TYPE (gnu_result);
- if (TREE_CODE (gnu_result_type) == RECORD_TYPE
- && TYPE_IS_PADDING_P (gnu_result_type))
- gnu_result_type = TREE_TYPE (TYPE_FIELDS (gnu_result_type));
+ gnu_type = TYPE_OBJECT_RECORD_TYPE (gnu_type);
+ if (attribute != Attr_Max_Size_In_Storage_Elements)
+ gnu_type = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_type)));
}
- /* We always want to return the underlying INTEGER_CST for an
- enumeration literal to avoid the need to call fold in lots
- of places. But don't do this is the parent will be taking
- the address of this object. */
- if (TREE_CODE (gnu_result) == CONST_DECL)
+ /* If we're looking for the size of a field, return the field size.
+ Otherwise, if the prefix is an object, or if 'Object_Size or
+ 'Max_Size_In_Storage_Elements has been specified, the result is the
+ GCC size of the type. Otherwise, the result is the RM_Size of the
+ type. */
+ if (TREE_CODE (gnu_prefix) == COMPONENT_REF)
+ gnu_result = DECL_SIZE (TREE_OPERAND (gnu_prefix, 1));
+ else if (TREE_CODE (gnu_prefix) != TYPE_DECL
+ || attribute == Attr_Object_Size
+ || attribute == Attr_Max_Size_In_Storage_Elements)
{
- gnat_temp = Parent (gnat_node);
- if (DECL_CONST_CORRESPONDING_VAR (gnu_result) == 0
- || (Nkind (gnat_temp) != N_Reference
- && ! (Nkind (gnat_temp) == N_Attribute_Reference
- && ((Get_Attribute_Id (Attribute_Name (gnat_temp))
- == Attr_Address)
- || (Get_Attribute_Id (Attribute_Name (gnat_temp))
- == Attr_Access)
- || (Get_Attribute_Id (Attribute_Name (gnat_temp))
- == Attr_Unchecked_Access)
- || (Get_Attribute_Id (Attribute_Name (gnat_temp))
- == Attr_Unrestricted_Access)))))
- gnu_result = DECL_INITIAL (gnu_result);
+ /* If this is a padded type, the GCC size isn't relevant to the
+ programmer. Normally, what we want is the RM_Size, which was set
+ from the specified size, but if it was not set, we want the size
+ of the relevant field. Using the MAX of those two produces the
+ right result in all case. Don't use the size of the field if it's
+ a self-referential type, since that's never what's wanted. */
+ if (TREE_CODE (gnu_type) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (gnu_type)
+ && TREE_CODE (gnu_expr) == COMPONENT_REF)
+ {
+ gnu_result = rm_size (gnu_type);
+ if (!(CONTAINS_PLACEHOLDER_P
+ (DECL_SIZE (TREE_OPERAND (gnu_expr, 1)))))
+ gnu_result
+ = size_binop (MAX_EXPR, gnu_result,
+ DECL_SIZE (TREE_OPERAND (gnu_expr, 1)));
+ }
+ else
+ gnu_result = TYPE_SIZE (gnu_type);
}
- break;
+ else
+ gnu_result = rm_size (gnu_type);
- case N_Integer_Literal:
- {
- tree gnu_type;
+ gcc_assert (gnu_result);
- /* Get the type of the result, looking inside any padding and
- left-justified modular types. Then get the value in that type. */
- gnu_type = gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ /* Deal with a self-referential size by returning the maximum size for a
+ type and by qualifying the size with the object for 'Size of an
+ object. */
+ if (CONTAINS_PLACEHOLDER_P (gnu_result))
+ {
+ if (TREE_CODE (gnu_prefix) != TYPE_DECL)
+ gnu_result = substitute_placeholder_in_expr (gnu_result, gnu_expr);
+ else
+ gnu_result = max_size (gnu_result, true);
+ }
- if (TREE_CODE (gnu_type) == RECORD_TYPE
- && TYPE_LEFT_JUSTIFIED_MODULAR_P (gnu_type))
- gnu_type = TREE_TYPE (TYPE_FIELDS (gnu_type));
+ /* If the type contains a template, subtract its size. */
+ if (TREE_CODE (gnu_type) == RECORD_TYPE
+ && TYPE_CONTAINS_TEMPLATE_P (gnu_type))
+ gnu_result = size_binop (MINUS_EXPR, gnu_result,
+ DECL_SIZE (TYPE_FIELDS (gnu_type)));
- gnu_result = UI_To_gnu (Intval (gnat_node), gnu_type);
- /* Get the type of the result, looking inside any padding and
- left-justified modular types. Then get the value in that type. */
- gnu_type = gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
- if (TREE_CODE (gnu_type) == RECORD_TYPE
- && TYPE_LEFT_JUSTIFIED_MODULAR_P (gnu_type))
- gnu_type = TREE_TYPE (TYPE_FIELDS (gnu_type));
+ /* Always perform division using unsigned arithmetic as the size cannot
+ be negative, but may be an overflowed positive value. This provides
+ correct results for sizes up to 512 MB.
- gnu_result = UI_To_gnu (Intval (gnat_node), gnu_type);
+ ??? Size should be calculated in storage elements directly. */
- /* If the result overflows (meaning it doesn't fit in its base type)
- or is outside of the range of the subtype, we have an illegal tree
- entry, so abort. Note that the test for of types with biased
- representation is harder, so we don't test in that case. */
- if (TREE_CONSTANT_OVERFLOW (gnu_result)
- || (TREE_CODE (TYPE_MIN_VALUE (gnu_result_type)) == INTEGER_CST
- && ! TYPE_BIASED_REPRESENTATION_P (gnu_result_type)
- && tree_int_cst_lt (gnu_result,
- TYPE_MIN_VALUE (gnu_result_type)))
- || (TREE_CODE (TYPE_MAX_VALUE (gnu_result_type)) == INTEGER_CST
- && ! TYPE_BIASED_REPRESENTATION_P (gnu_result_type)
- && tree_int_cst_lt (TYPE_MAX_VALUE (gnu_result_type),
- gnu_result)))
- gigi_abort (305);
- }
+ if (attribute == Attr_Max_Size_In_Storage_Elements)
+ gnu_result = convert (sizetype,
+ fold (build2 (CEIL_DIV_EXPR, bitsizetype,
+ gnu_result, bitsize_unit_node)));
break;
- case N_Character_Literal:
- /* If a Entity is present, it means that this was one of the
- literals in a user-defined character type. In that case,
- just return the value in the CONST_DECL. Otherwise, use the
- character code. In that case, the base type should be an
- INTEGER_TYPE, but we won't bother checking for that. */
+ case Attr_Alignment:
+ if (TREE_CODE (gnu_prefix) == COMPONENT_REF
+ && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))
+ == RECORD_TYPE)
+ && (TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))))
+ gnu_prefix = TREE_OPERAND (gnu_prefix, 0);
+
+ gnu_type = TREE_TYPE (gnu_prefix);
gnu_result_type = get_unpadded_type (Etype (gnat_node));
- if (Present (Entity (gnat_node)))
- gnu_result = DECL_INITIAL (get_gnu_tree (Entity (gnat_node)));
+ prefix_unused = true;
+
+ if (TREE_CODE (gnu_prefix) == COMPONENT_REF)
+ gnu_result = size_int (DECL_ALIGN (TREE_OPERAND (gnu_prefix, 1)));
else
- gnu_result = convert (gnu_result_type,
- build_int_2 (Char_Literal_Value (gnat_node), 0));
+ gnu_result = size_int (TYPE_ALIGN (gnu_type) / BITS_PER_UNIT);
break;
- case N_Real_Literal:
- /* If this is of a fixed-point type, the value we want is the
- value of the corresponding integer. */
- if (IN (Ekind (Underlying_Type (Etype (gnat_node))), Fixed_Point_Kind))
+ case Attr_First:
+ case Attr_Last:
+ case Attr_Range_Length:
+ prefix_unused = true;
+
+ if (INTEGRAL_TYPE_P (gnu_type) || TREE_CODE (gnu_type) == REAL_TYPE)
{
gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result = UI_To_gnu (Corresponding_Integer_Value (gnat_node),
- gnu_result_type);
- if (TREE_CONSTANT_OVERFLOW (gnu_result)
-#if 0
- || (TREE_CODE (TYPE_MIN_VALUE (gnu_result_type)) == INTEGER_CST
- && tree_int_cst_lt (gnu_result,
- TYPE_MIN_VALUE (gnu_result_type)))
- || (TREE_CODE (TYPE_MAX_VALUE (gnu_result_type)) == INTEGER_CST
- && tree_int_cst_lt (TYPE_MAX_VALUE (gnu_result_type),
- gnu_result))
-#endif
- )
- gigi_abort (305);
+
+ if (attribute == Attr_First)
+ gnu_result = TYPE_MIN_VALUE (gnu_type);
+ else if (attribute == Attr_Last)
+ gnu_result = TYPE_MAX_VALUE (gnu_type);
+ else
+ gnu_result
+ = build_binary_op
+ (MAX_EXPR, get_base_type (gnu_result_type),
+ build_binary_op
+ (PLUS_EXPR, get_base_type (gnu_result_type),
+ build_binary_op (MINUS_EXPR,
+ get_base_type (gnu_result_type),
+ convert (gnu_result_type,
+ TYPE_MAX_VALUE (gnu_type)),
+ convert (gnu_result_type,
+ TYPE_MIN_VALUE (gnu_type))),
+ convert (gnu_result_type, integer_one_node)),
+ convert (gnu_result_type, integer_zero_node));
+
+ break;
}
- /* We should never see a Vax_Float type literal, since the front end
- is supposed to transform these using appropriate conversions */
- else if (Vax_Float (Underlying_Type (Etype (gnat_node))))
- gigi_abort (334);
- else
- {
- Ureal ur_realval = Realval (gnat_node);
+ /* ... fall through ... */
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ case Attr_Length:
+ {
+ int Dimension = (Present (Expressions (gnat_node))
+ ? UI_To_Int (Intval (First (Expressions (gnat_node))))
+ : 1);
- /* If the real value is zero, so is the result. Otherwise,
- convert it to a machine number if it isn't already. That
- forces BASE to 0 or 2 and simplifies the rest of our logic. */
- if (UR_Is_Zero (ur_realval))
- gnu_result = convert (gnu_result_type, integer_zero_node);
- else
- {
- if (! Is_Machine_Number (gnat_node))
- ur_realval =
- Machine (Base_Type (Underlying_Type (Etype (gnat_node))),
- ur_realval);
+ /* Make sure any implicit dereference gets done. */
+ gnu_prefix = maybe_implicit_deref (gnu_prefix);
+ gnu_prefix = maybe_unconstrained_array (gnu_prefix);
+ gnu_type = TREE_TYPE (gnu_prefix);
+ prefix_unused = true;
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result
- = UI_To_gnu (Numerator (ur_realval), gnu_result_type);
+ if (TYPE_CONVENTION_FORTRAN_P (gnu_type))
+ {
+ int ndim;
+ tree gnu_type_temp;
- /* If we have a base of zero, divide by the denominator.
- Otherwise, the base must be 2 and we scale the value, which
- we know can fit in the mantissa of the type (hence the use
- of that type above). */
- if (Rbase (ur_realval) == 0)
- gnu_result
- = build_binary_op (RDIV_EXPR,
- get_base_type (gnu_result_type),
- gnu_result,
- UI_To_gnu (Denominator (ur_realval),
- gnu_result_type));
- else if (Rbase (ur_realval) != 2)
- gigi_abort (336);
+ for (ndim = 1, gnu_type_temp = gnu_type;
+ TREE_CODE (TREE_TYPE (gnu_type_temp)) == ARRAY_TYPE
+ && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type_temp));
+ ndim++, gnu_type_temp = TREE_TYPE (gnu_type_temp))
+ ;
- else
- gnu_result
- = build_real (gnu_result_type,
- REAL_VALUE_LDEXP
- (TREE_REAL_CST (gnu_result),
- - UI_To_Int (Denominator (ur_realval))));
- }
+ Dimension = ndim + 1 - Dimension;
+ }
+
+ for (; Dimension > 1; Dimension--)
+ gnu_type = TREE_TYPE (gnu_type);
+
+ gcc_assert (TREE_CODE (gnu_type) == ARRAY_TYPE);
+ if (attribute == Attr_First)
+ gnu_result
+ = TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)));
+ else if (attribute == Attr_Last)
+ gnu_result
+ = TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)));
+ else
+ /* 'Length or 'Range_Length. */
+ {
+ tree gnu_compute_type
+ = gnat_signed_or_unsigned_type (0,
+ get_base_type (gnu_result_type));
- /* Now see if we need to negate the result. Do it this way to
- properly handle -0. */
- if (UR_Is_Negative (Realval (gnat_node)))
gnu_result
- = build_unary_op (NEGATE_EXPR, get_base_type (gnu_result_type),
- gnu_result);
- }
+ = build_binary_op
+ (MAX_EXPR, gnu_compute_type,
+ build_binary_op
+ (PLUS_EXPR, gnu_compute_type,
+ build_binary_op
+ (MINUS_EXPR, gnu_compute_type,
+ convert (gnu_compute_type,
+ TYPE_MAX_VALUE
+ (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)))),
+ convert (gnu_compute_type,
+ TYPE_MIN_VALUE
+ (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))))),
+ convert (gnu_compute_type, integer_one_node)),
+ convert (gnu_compute_type, integer_zero_node));
+ }
- break;
+ /* If this has a PLACEHOLDER_EXPR, qualify it by the object we are
+ handling. Note that these attributes could not have been used on
+ an unconstrained array type. */
+ gnu_result = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_result,
+ gnu_prefix);
+ break;
+ }
- case N_String_Literal:
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- if (TYPE_PRECISION (TREE_TYPE (gnu_result_type)) == HOST_BITS_PER_CHAR)
- {
- /* We assume here that all strings are of type standard.string.
- "Weird" types of string have been converted to an aggregate
- by the expander. */
- String_Id gnat_string = Strval (gnat_node);
- int length = String_Length (gnat_string);
- char *string = (char *) alloca (length + 1);
- int i;
-
- /* Build the string with the characters in the literal. Note
- that Ada strings are 1-origin. */
- for (i = 0; i < length; i++)
- string[i] = Get_String_Char (gnat_string, i + 1);
-
- /* Put a null at the end of the string in case it's in a context
- where GCC will want to treat it as a C string. */
- string[i] = 0;
-
- gnu_result = build_string (length, string);
+ case Attr_Bit_Position:
+ case Attr_Position:
+ case Attr_First_Bit:
+ case Attr_Last_Bit:
+ case Attr_Bit:
+ {
+ HOST_WIDE_INT bitsize;
+ HOST_WIDE_INT bitpos;
+ tree gnu_offset;
+ tree gnu_field_bitpos;
+ tree gnu_field_offset;
+ tree gnu_inner;
+ enum machine_mode mode;
+ int unsignedp, volatilep;
- /* Strings in GCC don't normally have types, but we want
- this to not be converted to the array type. */
- TREE_TYPE (gnu_result) = gnu_result_type;
- }
- else
- {
- /* Build a list consisting of each character, then make
- the aggregate. */
- String_Id gnat_string = Strval (gnat_node);
- int length = String_Length (gnat_string);
- int i;
- tree gnu_list = NULL_TREE;
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_prefix = remove_conversions (gnu_prefix, true);
+ prefix_unused = true;
+
+ /* We can have 'Bit on any object, but if it isn't a COMPONENT_REF,
+ the result is 0. Don't allow 'Bit on a bare component, though. */
+ if (attribute == Attr_Bit
+ && TREE_CODE (gnu_prefix) != COMPONENT_REF
+ && TREE_CODE (gnu_prefix) != FIELD_DECL)
+ {
+ gnu_result = integer_zero_node;
+ break;
+ }
- for (i = 0; i < length; i++)
- gnu_list
- = tree_cons (NULL_TREE,
- convert (TREE_TYPE (gnu_result_type),
- build_int_2 (Get_String_Char (gnat_string,
- i + 1),
- 0)),
- gnu_list);
+ else
+ gcc_assert (TREE_CODE (gnu_prefix) == COMPONENT_REF
+ || (attribute == Attr_Bit_Position
+ && TREE_CODE (gnu_prefix) == FIELD_DECL));
- gnu_result
- = build_constructor (gnu_result_type, nreverse (gnu_list));
- }
- break;
+ get_inner_reference (gnu_prefix, &bitsize, &bitpos, &gnu_offset,
+ &mode, &unsignedp, &volatilep, false);
- case N_Pragma:
- if (type_annotate_only)
- break;
+ if (TREE_CODE (gnu_prefix) == COMPONENT_REF)
+ {
+ gnu_field_bitpos = bit_position (TREE_OPERAND (gnu_prefix, 1));
+ gnu_field_offset = byte_position (TREE_OPERAND (gnu_prefix, 1));
- /* Check for (and ignore) unrecognized pragma */
- if (! Is_Pragma_Name (Chars (gnat_node)))
- break;
+ for (gnu_inner = TREE_OPERAND (gnu_prefix, 0);
+ TREE_CODE (gnu_inner) == COMPONENT_REF
+ && DECL_INTERNAL_P (TREE_OPERAND (gnu_inner, 1));
+ gnu_inner = TREE_OPERAND (gnu_inner, 0))
+ {
+ gnu_field_bitpos
+ = size_binop (PLUS_EXPR, gnu_field_bitpos,
+ bit_position (TREE_OPERAND (gnu_inner, 1)));
+ gnu_field_offset
+ = size_binop (PLUS_EXPR, gnu_field_offset,
+ byte_position (TREE_OPERAND (gnu_inner, 1)));
+ }
+ }
+ else if (TREE_CODE (gnu_prefix) == FIELD_DECL)
+ {
+ gnu_field_bitpos = bit_position (gnu_prefix);
+ gnu_field_offset = byte_position (gnu_prefix);
+ }
+ else
+ {
+ gnu_field_bitpos = bitsize_zero_node;
+ gnu_field_offset = size_zero_node;
+ }
- switch (Get_Pragma_Id (Chars (gnat_node)))
- {
- case Pragma_Inspection_Point:
- /* Do nothing at top level: all such variables are already
- viewable. */
- if (global_bindings_p ())
+ switch (attribute)
+ {
+ case Attr_Position:
+ gnu_result = gnu_field_offset;
break;
- set_lineno (gnat_node, 1);
- for (gnat_temp = First (Pragma_Argument_Associations (gnat_node));
- Present (gnat_temp);
- gnat_temp = Next (gnat_temp))
- {
- gnu_expr = gnat_to_gnu (Expression (gnat_temp));
- if (TREE_CODE (gnu_expr) == UNCONSTRAINED_ARRAY_REF)
- gnu_expr = TREE_OPERAND (gnu_expr, 0);
+ case Attr_First_Bit:
+ case Attr_Bit:
+ gnu_result = size_int (bitpos % BITS_PER_UNIT);
+ break;
- gnu_expr = build1 (USE_EXPR, void_type_node, gnu_expr);
- TREE_SIDE_EFFECTS (gnu_expr) = 1;
- expand_expr_stmt (gnu_expr);
- }
- break;
+ case Attr_Last_Bit:
+ gnu_result = bitsize_int (bitpos % BITS_PER_UNIT);
+ gnu_result = size_binop (PLUS_EXPR, gnu_result,
+ TYPE_SIZE (TREE_TYPE (gnu_prefix)));
+ gnu_result = size_binop (MINUS_EXPR, gnu_result,
+ bitsize_one_node);
+ break;
- case Pragma_Optimize:
- switch (Chars (Expression
- (First (Pragma_Argument_Associations (gnat_node)))))
- {
- case Name_Time: case Name_Space:
- if (optimize == 0)
- post_error ("insufficient -O value?", gnat_node);
- break;
+ case Attr_Bit_Position:
+ gnu_result = gnu_field_bitpos;
+ break;
+ }
- case Name_Off:
- if (optimize != 0)
- post_error ("must specify -O0?", gnat_node);
- break;
+ /* If this has a PLACEHOLDER_EXPR, qualify it by the object
+ we are handling. */
+ gnu_result = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_result, gnu_prefix);
+ break;
+ }
- default:
- gigi_abort (331);
- break;
- }
- break;
+ case Attr_Min:
+ case Attr_Max:
+ {
+ tree gnu_lhs = gnat_to_gnu (First (Expressions (gnat_node)));
+ tree gnu_rhs = gnat_to_gnu (Next (First (Expressions (gnat_node))));
- case Pragma_Reviewable:
- if (write_symbols == NO_DEBUG)
- post_error ("must specify -g?", gnat_node);
- break;
- }
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result = build_binary_op (attribute == Attr_Min
+ ? MIN_EXPR : MAX_EXPR,
+ gnu_result_type, gnu_lhs, gnu_rhs);
+ }
break;
- /**************************************/
- /* Chapter 3: Declarations and Types: */
- /**************************************/
-
- case N_Subtype_Declaration:
- case N_Full_Type_Declaration:
- case N_Incomplete_Type_Declaration:
- case N_Private_Type_Declaration:
- case N_Private_Extension_Declaration:
- case N_Task_Type_Declaration:
- process_type (Defining_Entity (gnat_node));
+ case Attr_Passed_By_Reference:
+ gnu_result = size_int (default_pass_by_ref (gnu_type)
+ || must_pass_by_ref (gnu_type));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
break;
- case N_Object_Declaration:
- case N_Exception_Declaration:
- gnat_temp = Defining_Entity (gnat_node);
+ case Attr_Component_Size:
+ if (TREE_CODE (gnu_prefix) == COMPONENT_REF
+ && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))
+ == RECORD_TYPE)
+ && (TYPE_IS_PADDING_P (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))))
+ gnu_prefix = TREE_OPERAND (gnu_prefix, 0);
- /* If we are just annotating types and this object has an unconstrained
- or task type, don't elaborate it. */
- if (type_annotate_only
- && (((Is_Array_Type (Etype (gnat_temp))
- || Is_Record_Type (Etype (gnat_temp)))
- && ! Is_Constrained (Etype (gnat_temp)))
- || Is_Concurrent_Type (Etype (gnat_temp))))
- break;
+ gnu_prefix = maybe_implicit_deref (gnu_prefix);
+ gnu_type = TREE_TYPE (gnu_prefix);
- if (Present (Expression (gnat_node))
- && ! (Nkind (gnat_node) == N_Object_Declaration
- && No_Initialization (gnat_node))
- && (! type_annotate_only
- || Compile_Time_Known_Value (Expression (gnat_node))))
- {
- gnu_expr = gnat_to_gnu (Expression (gnat_node));
- if (Do_Range_Check (Expression (gnat_node)))
- gnu_expr = emit_range_check (gnu_expr, Etype (gnat_temp));
+ if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE)
+ gnu_type = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_type))));
- /* If this object has its elaboration delayed, we must force
- evaluation of GNU_EXPR right now and save it for when the object
- is frozen. */
- if (Present (Freeze_Node (gnat_temp)))
- {
- if ((Is_Public (gnat_temp) || global_bindings_p ())
- && ! TREE_CONSTANT (gnu_expr))
- gnu_expr
- = create_var_decl (create_concat_name (gnat_temp, "init"),
- NULL_TREE, TREE_TYPE (gnu_expr), gnu_expr,
- 0, Is_Public (gnat_temp), 0, 0, 0);
- else
- gnu_expr = maybe_variable (gnu_expr, Expression (gnat_node));
+ while (TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE
+ && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type)))
+ gnu_type = TREE_TYPE (gnu_type);
- save_gnu_tree (gnat_node, gnu_expr, 1);
- }
- }
- else
- gnu_expr = 0;
+ gcc_assert (TREE_CODE (gnu_type) == ARRAY_TYPE);
- if (type_annotate_only && gnu_expr != 0
- && TREE_CODE (gnu_expr) == ERROR_MARK)
- gnu_expr = 0;
+ /* Note this size cannot be self-referential. */
+ gnu_result = TYPE_SIZE (TREE_TYPE (gnu_type));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ prefix_unused = true;
+ break;
- if (No (Freeze_Node (gnat_temp)))
- gnat_to_gnu_entity (gnat_temp, gnu_expr, 1);
+ case Attr_Null_Parameter:
+ /* This is just a zero cast to the pointer type for
+ our prefix and dereferenced. */
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result
+ = build_unary_op (INDIRECT_REF, NULL_TREE,
+ convert (build_pointer_type (gnu_result_type),
+ integer_zero_node));
+ TREE_PRIVATE (gnu_result) = 1;
break;
- case N_Object_Renaming_Declaration:
+ case Attr_Mechanism_Code:
+ {
+ int code;
+ Entity_Id gnat_obj = Entity (Prefix (gnat_node));
- gnat_temp = Defining_Entity (gnat_node);
+ prefix_unused = true;
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ if (Present (Expressions (gnat_node)))
+ {
+ int i = UI_To_Int (Intval (First (Expressions (gnat_node))));
- /* Don't do anything if this renaming handled by the front end.
- or if we are just annotating types and this object has an
- unconstrained or task type, don't elaborate it. */
- if (! Is_Renaming_Of_Object (gnat_temp)
- && ! (type_annotate_only
- && (((Is_Array_Type (Etype (gnat_temp))
- || Is_Record_Type (Etype (gnat_temp)))
- && ! Is_Constrained (Etype (gnat_temp)))
- || Is_Concurrent_Type (Etype (gnat_temp)))))
- {
- gnu_expr = gnat_to_gnu (Renamed_Object (gnat_temp));
- gnat_to_gnu_entity (gnat_temp, gnu_expr, 1);
- }
- break;
+ for (gnat_obj = First_Formal (gnat_obj); i > 1;
+ i--, gnat_obj = Next_Formal (gnat_obj))
+ ;
+ }
- case N_Implicit_Label_Declaration:
- gnat_to_gnu_entity (Defining_Entity (gnat_node), NULL_TREE, 1);
+ code = Mechanism (gnat_obj);
+ if (code == Default)
+ code = ((present_gnu_tree (gnat_obj)
+ && (DECL_BY_REF_P (get_gnu_tree (gnat_obj))
+ || ((TREE_CODE (get_gnu_tree (gnat_obj))
+ == PARM_DECL)
+ && (DECL_BY_COMPONENT_PTR_P
+ (get_gnu_tree (gnat_obj))))))
+ ? By_Reference : By_Copy);
+ gnu_result = convert (gnu_result_type, size_int (- code));
+ }
break;
- case N_Subprogram_Renaming_Declaration:
- case N_Package_Renaming_Declaration:
- case N_Exception_Renaming_Declaration:
- case N_Number_Declaration:
- /* These are fully handled in the front end. */
+ default:
+ /* Say we have an unimplemented attribute. Then set the value to be
+ returned to be a zero and hope that's something we can convert to the
+ type of this attribute. */
+ post_error ("unimplemented attribute", gnat_node);
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result = integer_zero_node;
break;
+ }
- /*************************************/
- /* Chapter 4: Names and Expressions: */
- /*************************************/
+ /* If this is an attribute where the prefix was unused, force a use of it if
+ it has a side-effect. But don't do it if the prefix is just an entity
+ name. However, if an access check is needed, we must do it. See second
+ example in AARM 11.6(5.e). */
+ if (prefix_unused && TREE_SIDE_EFFECTS (gnu_prefix)
+ && !Is_Entity_Name (Prefix (gnat_node)))
+ gnu_result = fold (build2 (COMPOUND_EXPR, TREE_TYPE (gnu_result),
+ gnu_prefix, gnu_result));
- case N_Explicit_Dereference:
- gnu_result = gnat_to_gnu (Prefix (gnat_node));
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ *gnu_result_type_p = gnu_result_type;
+ return gnu_result;
+}
+\f
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Case_Statement,
+ to a GCC tree, which is returned. */
- /* Emit access check if necessary */
- if (Do_Access_Check (gnat_node))
- gnu_result = emit_access_check (gnu_result);
+static tree
+Case_Statement_to_gnu (Node_Id gnat_node)
+{
+ tree gnu_result;
+ tree gnu_expr;
+ Node_Id gnat_when;
+
+ gnu_expr = gnat_to_gnu (Expression (gnat_node));
+ gnu_expr = convert (get_base_type (TREE_TYPE (gnu_expr)), gnu_expr);
+
+ /* The range of values in a case statement is determined by the rules in
+ RM 5.4(7-9). In almost all cases, this range is represented by the Etype
+ of the expression. One exception arises in the case of a simple name that
+ is parenthesized. This still has the Etype of the name, but since it is
+ not a name, para 7 does not apply, and we need to go to the base type.
+ This is the only case where parenthesization affects the dynamic
+ semantics (i.e. the range of possible values at runtime that is covered
+ by the others alternative.
+
+ Another exception is if the subtype of the expression is non-static. In
+ that case, we also have to use the base type. */
+ if (Paren_Count (Expression (gnat_node)) != 0
+ || !Is_OK_Static_Subtype (Underlying_Type
+ (Etype (Expression (gnat_node)))))
+ gnu_expr = convert (get_base_type (TREE_TYPE (gnu_expr)), gnu_expr);
+
+ /* We build a SWITCH_EXPR that contains the code with interspersed
+ CASE_LABEL_EXPRs for each label. */
+
+ push_stack (&gnu_switch_label_stack, NULL_TREE, create_artificial_label ());
+ start_stmt_group ();
+ for (gnat_when = First_Non_Pragma (Alternatives (gnat_node));
+ Present (gnat_when);
+ gnat_when = Next_Non_Pragma (gnat_when))
+ {
+ Node_Id gnat_choice;
- gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_result);
- break;
+ /* First compile all the different case choices for the current WHEN
+ alternative. */
+ for (gnat_choice = First (Discrete_Choices (gnat_when));
+ Present (gnat_choice); gnat_choice = Next (gnat_choice))
+ {
+ tree gnu_low = NULL_TREE, gnu_high = NULL_TREE;
- case N_Indexed_Component:
- {
- tree gnu_array_object = gnat_to_gnu (Prefix (gnat_node));
- tree gnu_type;
- int ndim;
- int i;
- Node_Id *gnat_expr_array;
+ switch (Nkind (gnat_choice))
+ {
+ case N_Range:
+ gnu_low = gnat_to_gnu (Low_Bound (gnat_choice));
+ gnu_high = gnat_to_gnu (High_Bound (gnat_choice));
+ break;
- /* Emit access check if necessary */
- if (Do_Access_Check (gnat_node))
- gnu_array_object = emit_access_check (gnu_array_object);
+ case N_Subtype_Indication:
+ gnu_low = gnat_to_gnu (Low_Bound (Range_Expression
+ (Constraint (gnat_choice))));
+ gnu_high = gnat_to_gnu (High_Bound (Range_Expression
+ (Constraint (gnat_choice))));
+ break;
- gnu_array_object = maybe_implicit_deref (gnu_array_object);
- gnu_array_object = maybe_unconstrained_array (gnu_array_object);
+ case N_Identifier:
+ case N_Expanded_Name:
+ /* This represents either a subtype range or a static value of
+ some kind; Ekind says which. If a static value, fall through
+ to the next case. */
+ if (IN (Ekind (Entity (gnat_choice)), Type_Kind))
+ {
+ tree gnu_type = get_unpadded_type (Entity (gnat_choice));
- /* If we got a padded type, remove it too. */
- if (TREE_CODE (TREE_TYPE (gnu_array_object)) == RECORD_TYPE
- && TYPE_IS_PADDING_P (TREE_TYPE (gnu_array_object)))
- gnu_array_object
- = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_array_object))),
- gnu_array_object);
+ gnu_low = fold (TYPE_MIN_VALUE (gnu_type));
+ gnu_high = fold (TYPE_MAX_VALUE (gnu_type));
+ break;
+ }
- gnu_result = gnu_array_object;
+ /* ... fall through ... */
- /* First compute the number of dimensions of the array, then
- fill the expression array, the order depending on whether
- this is a Convention_Fortran array or not. */
- for (ndim = 1, gnu_type = TREE_TYPE (gnu_array_object);
- TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE
- && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type));
- ndim++, gnu_type = TREE_TYPE (gnu_type))
- ;
+ case N_Character_Literal:
+ case N_Integer_Literal:
+ gnu_low = gnat_to_gnu (gnat_choice);
+ break;
- gnat_expr_array = (Node_Id *) alloca (ndim * sizeof (Node_Id));
+ case N_Others_Choice:
+ break;
- if (TYPE_CONVENTION_FORTRAN_P (TREE_TYPE (gnu_array_object)))
- for (i = ndim - 1, gnat_temp = First (Expressions (gnat_node));
- i >= 0;
- i--, gnat_temp = Next (gnat_temp))
- gnat_expr_array[i] = gnat_temp;
- else
- for (i = 0, gnat_temp = First (Expressions (gnat_node));
- i < ndim;
- i++, gnat_temp = Next (gnat_temp))
- gnat_expr_array[i] = gnat_temp;
+ default:
+ gcc_unreachable ();
+ }
- for (i = 0, gnu_type = TREE_TYPE (gnu_array_object);
- i < ndim; i++, gnu_type = TREE_TYPE (gnu_type))
- {
- if (TREE_CODE (gnu_type) != ARRAY_TYPE)
- gigi_abort (307);
+ add_stmt_with_node (build3 (CASE_LABEL_EXPR, void_type_node,
+ gnu_low, gnu_high,
+ create_artificial_label ()),
+ gnat_choice);
+ }
- gnat_temp = gnat_expr_array[i];
- gnu_expr = gnat_to_gnu (gnat_temp);
+ /* Push a binding level here in case variables are declared since we want
+ them to be local to this set of statements instead of the block
+ containing the Case statement. */
+ add_stmt (build_stmt_group (Statements (gnat_when), true));
+ add_stmt (build1 (GOTO_EXPR, void_type_node,
+ TREE_VALUE (gnu_switch_label_stack)));
+ }
- if (Do_Range_Check (gnat_temp))
- gnu_expr
- = emit_index_check
- (gnu_array_object, gnu_expr,
- TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))),
- TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))));
+ /* Now emit a definition of the label all the cases branched to. */
+ add_stmt (build1 (LABEL_EXPR, void_type_node,
+ TREE_VALUE (gnu_switch_label_stack)));
+ gnu_result = build3 (SWITCH_EXPR, TREE_TYPE (gnu_expr), gnu_expr,
+ end_stmt_group (), NULL_TREE);
+ pop_stack (&gnu_switch_label_stack);
- gnu_result = build_binary_op (ARRAY_REF, NULL_TREE,
- gnu_result, gnu_expr);
- }
- }
+ return gnu_result;
+}
+\f
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Loop_Statement,
+ to a GCC tree, which is returned. */
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- break;
+static tree
+Loop_Statement_to_gnu (Node_Id gnat_node)
+{
+ /* ??? It would be nice to use "build" here, but there's no build5. */
+ tree gnu_loop_stmt = build_nt (LOOP_STMT, NULL_TREE, NULL_TREE,
+ NULL_TREE, NULL_TREE, NULL_TREE);
+ tree gnu_loop_var = NULL_TREE;
+ Node_Id gnat_iter_scheme = Iteration_Scheme (gnat_node);
+ tree gnu_cond_expr = NULL_TREE;
+ tree gnu_result;
+
+ TREE_TYPE (gnu_loop_stmt) = void_type_node;
+ TREE_SIDE_EFFECTS (gnu_loop_stmt) = 1;
+ LOOP_STMT_LABEL (gnu_loop_stmt) = create_artificial_label ();
+ annotate_with_node (gnu_loop_stmt, gnat_node);
+
+ /* Save the end label of this LOOP_STMT in a stack so that the corresponding
+ N_Exit_Statement can find it. */
+ push_stack (&gnu_loop_label_stack, NULL_TREE,
+ LOOP_STMT_LABEL (gnu_loop_stmt));
+
+ /* Set the condition that under which the loop should continue.
+ For "LOOP .... END LOOP;" the condition is always true. */
+ if (No (gnat_iter_scheme))
+ ;
+ /* The case "WHILE condition LOOP ..... END LOOP;" */
+ else if (Present (Condition (gnat_iter_scheme)))
+ LOOP_STMT_TOP_COND (gnu_loop_stmt)
+ = gnat_to_gnu (Condition (gnat_iter_scheme));
+ else
+ {
+ /* We have an iteration scheme. */
+ Node_Id gnat_loop_spec = Loop_Parameter_Specification (gnat_iter_scheme);
+ Entity_Id gnat_loop_var = Defining_Entity (gnat_loop_spec);
+ Entity_Id gnat_type = Etype (gnat_loop_var);
+ tree gnu_type = get_unpadded_type (gnat_type);
+ tree gnu_low = TYPE_MIN_VALUE (gnu_type);
+ tree gnu_high = TYPE_MAX_VALUE (gnu_type);
+ bool reversep = Reverse_Present (gnat_loop_spec);
+ tree gnu_first = reversep ? gnu_high : gnu_low;
+ tree gnu_last = reversep ? gnu_low : gnu_high;
+ enum tree_code end_code = reversep ? GE_EXPR : LE_EXPR;
+ tree gnu_base_type = get_base_type (gnu_type);
+ tree gnu_limit = (reversep ? TYPE_MIN_VALUE (gnu_base_type)
+ : TYPE_MAX_VALUE (gnu_base_type));
+
+ /* We know the loop variable will not overflow if GNU_LAST is a constant
+ and is not equal to GNU_LIMIT. If it might overflow, we have to move
+ the limit test to the end of the loop. In that case, we have to test
+ for an empty loop outside the loop. */
+ if (TREE_CODE (gnu_last) != INTEGER_CST
+ || TREE_CODE (gnu_limit) != INTEGER_CST
+ || tree_int_cst_equal (gnu_last, gnu_limit))
+ {
+ gnu_cond_expr
+ = build3 (COND_EXPR, void_type_node,
+ build_binary_op (LE_EXPR, integer_type_node,
+ gnu_low, gnu_high),
+ NULL_TREE, alloc_stmt_list ());
+ annotate_with_node (gnu_cond_expr, gnat_loop_spec);
+ }
- case N_Slice:
- {
- tree gnu_type;
- Node_Id gnat_range_node = Discrete_Range (gnat_node);
+ /* Open a new nesting level that will surround the loop to declare the
+ loop index variable. */
+ start_stmt_group ();
+ gnat_pushlevel ();
+
+ /* Declare the loop index and set it to its initial value. */
+ gnu_loop_var = gnat_to_gnu_entity (gnat_loop_var, gnu_first, 1);
+ if (DECL_BY_REF_P (gnu_loop_var))
+ gnu_loop_var = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_loop_var);
+
+ /* The loop variable might be a padded type, so use `convert' to get a
+ reference to the inner variable if so. */
+ gnu_loop_var = convert (get_base_type (gnu_type), gnu_loop_var);
+
+ /* Set either the top or bottom exit condition as appropriate depending
+ on whether or not we know an overflow cannot occur. */
+ if (gnu_cond_expr)
+ LOOP_STMT_BOT_COND (gnu_loop_stmt)
+ = build_binary_op (NE_EXPR, integer_type_node,
+ gnu_loop_var, gnu_last);
+ else
+ LOOP_STMT_TOP_COND (gnu_loop_stmt)
+ = build_binary_op (end_code, integer_type_node,
+ gnu_loop_var, gnu_last);
+
+ LOOP_STMT_UPDATE (gnu_loop_stmt)
+ = build_binary_op (reversep ? PREDECREMENT_EXPR
+ : PREINCREMENT_EXPR,
+ TREE_TYPE (gnu_loop_var),
+ gnu_loop_var,
+ convert (TREE_TYPE (gnu_loop_var),
+ integer_one_node));
+ annotate_with_node (LOOP_STMT_UPDATE (gnu_loop_stmt),
+ gnat_iter_scheme);
+ }
- gnu_result = gnat_to_gnu (Prefix (gnat_node));
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ /* If the loop was named, have the name point to this loop. In this case,
+ the association is not a ..._DECL node, but the end label from this
+ LOOP_STMT. */
+ if (Present (Identifier (gnat_node)))
+ save_gnu_tree (Entity (Identifier (gnat_node)),
+ LOOP_STMT_LABEL (gnu_loop_stmt), true);
+
+ /* Make the loop body into its own block, so any allocated storage will be
+ released every iteration. This is needed for stack allocation. */
+ LOOP_STMT_BODY (gnu_loop_stmt)
+ = build_stmt_group (Statements (gnat_node), true);
+
+ /* If we declared a variable, then we are in a statement group for that
+ declaration. Add the LOOP_STMT to it and make that the "loop". */
+ if (gnu_loop_var)
+ {
+ add_stmt (gnu_loop_stmt);
+ gnat_poplevel ();
+ gnu_loop_stmt = end_stmt_group ();
+ }
- /* Emit access check if necessary */
- if (Do_Access_Check (gnat_node))
- gnu_result = emit_access_check (gnu_result);
+ /* If we have an outer COND_EXPR, that's our result and this loop is its
+ "true" statement. Otherwise, the result is the LOOP_STMT. */
+ if (gnu_cond_expr)
+ {
+ COND_EXPR_THEN (gnu_cond_expr) = gnu_loop_stmt;
+ gnu_result = gnu_cond_expr;
+ recalculate_side_effects (gnu_cond_expr);
+ }
+ else
+ gnu_result = gnu_loop_stmt;
- /* Do any implicit dereferences of the prefix and do any needed
- range check. */
- gnu_result = maybe_implicit_deref (gnu_result);
- gnu_result = maybe_unconstrained_array (gnu_result);
- gnu_type = TREE_TYPE (gnu_result);
- if (Do_Range_Check (gnat_range_node))
- {
- /* Get the bounds of the slice. */
- tree gnu_index_type
- = TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_result_type));
- tree gnu_min_expr = TYPE_MIN_VALUE (gnu_index_type);
- tree gnu_max_expr = TYPE_MAX_VALUE (gnu_index_type);
- tree gnu_expr_l, gnu_expr_h, gnu_expr_type;
-
- /* Check to see that the minimum slice value is in range */
- gnu_expr_l
- = emit_index_check
- (gnu_result, gnu_min_expr,
- TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))),
- TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))));
-
- /* Check to see that the maximum slice value is in range */
- gnu_expr_h
- = emit_index_check
- (gnu_result, gnu_max_expr,
- TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))),
- TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))));
-
- /* Derive a good type to convert everything too */
- gnu_expr_type = get_base_type (TREE_TYPE (gnu_expr_l));
+ pop_stack (&gnu_loop_label_stack);
- /* Build a compound expression that does the range checks */
- gnu_expr
- = build_binary_op (COMPOUND_EXPR, gnu_expr_type,
- convert (gnu_expr_type, gnu_expr_h),
- convert (gnu_expr_type, gnu_expr_l));
+ return gnu_result;
+}
+\f
+/* Subroutine of gnat_to_gnu to process gnat_node, an N_Subprogram_Body. We
+ don't return anything. */
- /* Build a conditional expression that returns the range checks
- expression if the slice range is not null (max >= min) or
- returns the min if the slice range is null */
- gnu_expr
- = fold (build (COND_EXPR, gnu_expr_type,
- build_binary_op (GE_EXPR, gnu_expr_type,
- convert (gnu_expr_type,
- gnu_max_expr),
- convert (gnu_expr_type,
- gnu_min_expr)),
- gnu_expr, gnu_min_expr));
- }
- else
- gnu_expr = TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_result_type));
+static void
+Subprogram_Body_to_gnu (Node_Id gnat_node)
+{
+ /* Save debug output mode in case it is reset. */
+ enum debug_info_type save_write_symbols = write_symbols;
+ const struct gcc_debug_hooks *const save_debug_hooks = debug_hooks;
+ /* Defining identifier of a parameter to the subprogram. */
+ Entity_Id gnat_param;
+ /* The defining identifier for the subprogram body. Note that if a
+ specification has appeared before for this body, then the identifier
+ occurring in that specification will also be a defining identifier and all
+ the calls to this subprogram will point to that specification. */
+ Entity_Id gnat_subprog_id
+ = (Present (Corresponding_Spec (gnat_node))
+ ? Corresponding_Spec (gnat_node) : Defining_Entity (gnat_node));
+ /* The FUNCTION_DECL node corresponding to the subprogram spec. */
+ tree gnu_subprog_decl;
+ /* The FUNCTION_TYPE node corresponding to the subprogram spec. */
+ tree gnu_subprog_type;
+ tree gnu_cico_list;
+ tree gnu_result;
+
+ /* If this is a generic object or if it has been eliminated,
+ ignore it. */
+ if (Ekind (gnat_subprog_id) == E_Generic_Procedure
+ || Ekind (gnat_subprog_id) == E_Generic_Function
+ || Is_Eliminated (gnat_subprog_id))
+ return;
- gnu_result = build_binary_op (ARRAY_RANGE_REF, gnu_result_type,
- gnu_result, gnu_expr);
- }
- break;
+ /* If debug information is suppressed for the subprogram, turn debug
+ mode off for the duration of processing. */
+ if (!Needs_Debug_Info (gnat_subprog_id))
+ {
+ write_symbols = NO_DEBUG;
+ debug_hooks = &do_nothing_debug_hooks;
+ }
- case N_Selected_Component:
+ /* If this subprogram acts as its own spec, define it. Otherwise, just get
+ the already-elaborated tree node. However, if this subprogram had its
+ elaboration deferred, we will already have made a tree node for it. So
+ treat it as not being defined in that case. Such a subprogram cannot
+ have an address clause or a freeze node, so this test is safe, though it
+ does disable some otherwise-useful error checking. */
+ gnu_subprog_decl
+ = gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE,
+ Acts_As_Spec (gnat_node)
+ && !present_gnu_tree (gnat_subprog_id));
+
+ gnu_subprog_type = TREE_TYPE (gnu_subprog_decl);
+
+ /* Set the line number in the decl to correspond to that of the body so that
+ the line number notes are written
+ correctly. */
+ Sloc_to_locus (Sloc (gnat_node), &DECL_SOURCE_LOCATION (gnu_subprog_decl));
+
+ begin_subprog_body (gnu_subprog_decl);
+ gnu_cico_list = TYPE_CI_CO_LIST (gnu_subprog_type);
+
+ /* If there are OUT parameters, we need to ensure that the return statement
+ properly copies them out. We do this by making a new block and converting
+ any inner return into a goto to a label at the end of the block. */
+ push_stack (&gnu_return_label_stack, NULL_TREE,
+ gnu_cico_list ? create_artificial_label () : NULL_TREE);
+
+ /* Get a tree corresponding to the code for the subprogram. */
+ start_stmt_group ();
+ gnat_pushlevel ();
+
+ /* See if there are any parameters for which we don't yet have GCC entities.
+ These must be for OUT parameters for which we will be making VAR_DECL
+ nodes here. Fill them in to TYPE_CI_CO_LIST, which must contain the empty
+ entry as well. We can match up the entries because TYPE_CI_CO_LIST is in
+ the order of the parameters. */
+ for (gnat_param = First_Formal (gnat_subprog_id);
+ Present (gnat_param);
+ gnat_param = Next_Formal_With_Extras (gnat_param))
+ if (!present_gnu_tree (gnat_param))
{
- tree gnu_prefix = gnat_to_gnu (Prefix (gnat_node));
- Entity_Id gnat_field = Entity (Selector_Name (gnat_node));
- Entity_Id gnat_pref_type = Etype (Prefix (gnat_node));
- tree gnu_field;
+ /* Skip any entries that have been already filled in; they must
+ correspond to IN OUT parameters. */
+ for (; gnu_cico_list && TREE_VALUE (gnu_cico_list);
+ gnu_cico_list = TREE_CHAIN (gnu_cico_list))
+ ;
- while (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind)
- || IN (Ekind (gnat_pref_type), Access_Kind))
- {
- if (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind))
- gnat_pref_type = Underlying_Type (gnat_pref_type);
- else if (IN (Ekind (gnat_pref_type), Access_Kind))
- gnat_pref_type = Designated_Type (gnat_pref_type);
- }
+ /* Do any needed references for padded types. */
+ TREE_VALUE (gnu_cico_list)
+ = convert (TREE_TYPE (TREE_PURPOSE (gnu_cico_list)),
+ gnat_to_gnu_entity (gnat_param, NULL_TREE, 1));
+ }
- if (Do_Access_Check (gnat_node))
- gnu_prefix = emit_access_check (gnu_prefix);
+ process_decls (Declarations (gnat_node), Empty, Empty, true, true);
- gnu_prefix = maybe_implicit_deref (gnu_prefix);
+ /* Generate the code of the subprogram itself. A return statement will be
+ present and any OUT parameters will be handled there. */
+ add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node)));
+ gnat_poplevel ();
+ gnu_result = end_stmt_group ();
- /* For discriminant references in tagged types always substitute the
- corresponding discriminant as the actual selected component. */
+ /* If we made a special return label, we need to make a block that contains
+ the definition of that label and the copying to the return value. That
+ block first contains the function, then the label and copy statement. */
+ if (TREE_VALUE (gnu_return_label_stack))
+ {
+ tree gnu_retval;
- if (Is_Tagged_Type (gnat_pref_type))
- while (Present (Corresponding_Discriminant (gnat_field)))
- gnat_field = Corresponding_Discriminant (gnat_field);
+ start_stmt_group ();
+ gnat_pushlevel ();
+ add_stmt (gnu_result);
+ add_stmt (build1 (LABEL_EXPR, void_type_node,
+ TREE_VALUE (gnu_return_label_stack)));
- /* For discriminant references of untagged types always substitute the
- corresponding girder discriminant. */
+ gnu_cico_list = TYPE_CI_CO_LIST (gnu_subprog_type);
+ if (list_length (gnu_cico_list) == 1)
+ gnu_retval = TREE_VALUE (gnu_cico_list);
+ else
+ gnu_retval = gnat_build_constructor (TREE_TYPE (gnu_subprog_type),
+ gnu_cico_list);
+
+ if (DECL_P (gnu_retval) && DECL_BY_REF_P (gnu_retval))
+ gnu_retval = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_retval);
+
+ add_stmt_with_node
+ (build1 (RETURN_EXPR, void_type_node,
+ build2 (MODIFY_EXPR, TREE_TYPE (gnu_retval),
+ DECL_RESULT (current_function_decl), gnu_retval)),
+ gnat_node);
+ gnat_poplevel ();
+ gnu_result = end_stmt_group ();
+ }
- else if (Present (Corresponding_Discriminant (gnat_field)))
- gnat_field = Original_Record_Component (gnat_field);
+ pop_stack (&gnu_return_label_stack);
+
+ /* Initialize the information node for the function and set the
+ end location. */
+ allocate_struct_function (current_function_decl);
+ Sloc_to_locus
+ ((Present (End_Label (Handled_Statement_Sequence (gnat_node)))
+ ? Sloc (End_Label (Handled_Statement_Sequence (gnat_node)))
+ : Sloc (gnat_node)),
+ &cfun->function_end_locus);
+
+ end_subprog_body (gnu_result);
+
+ /* Disconnect the trees for parameters that we made variables for from the
+ GNAT entities since these are unusable after we end the function. */
+ for (gnat_param = First_Formal (gnat_subprog_id);
+ Present (gnat_param);
+ gnat_param = Next_Formal_With_Extras (gnat_param))
+ if (TREE_CODE (get_gnu_tree (gnat_param)) == VAR_DECL)
+ save_gnu_tree (gnat_param, NULL_TREE, false);
+
+ mark_out_of_scope (Defining_Unit_Name (Specification (gnat_node)));
+ write_symbols = save_write_symbols;
+ debug_hooks = save_debug_hooks;
+}
+\f
+/* Subroutine of gnat_to_gnu to translate gnat_node, either an N_Function_Call
+ or an N_Procedure_Call_Statement, to a GCC tree, which is returned.
+ GNU_RESULT_TYPE_P is a pointer to where we should place the result type.
+ If GNU_TARGET is non-null, this must be a function call and the result
+ of the call is to be placed into that object. */
- /* Handle extracting the real or imaginary part of a complex.
- The real part is the first field and the imaginary the last. */
+static tree
+call_to_gnu (Node_Id gnat_node, tree *gnu_result_type_p, tree gnu_target)
+{
+ tree gnu_result;
+ /* The GCC node corresponding to the GNAT subprogram name. This can either
+ be a FUNCTION_DECL node if we are dealing with a standard subprogram call,
+ or an indirect reference expression (an INDIRECT_REF node) pointing to a
+ subprogram. */
+ tree gnu_subprog_node = gnat_to_gnu (Name (gnat_node));
+ /* The FUNCTION_TYPE node giving the GCC type of the subprogram. */
+ tree gnu_subprog_type = TREE_TYPE (gnu_subprog_node);
+ tree gnu_subprog_addr = build_unary_op (ADDR_EXPR, NULL_TREE,
+ gnu_subprog_node);
+ Entity_Id gnat_formal;
+ Node_Id gnat_actual;
+ tree gnu_actual_list = NULL_TREE;
+ tree gnu_name_list = NULL_TREE;
+ tree gnu_before_list = NULL_TREE;
+ tree gnu_after_list = NULL_TREE;
+ tree gnu_subprog_call;
- if (TREE_CODE (TREE_TYPE (gnu_prefix)) == COMPLEX_TYPE)
- gnu_result = build_unary_op (Present (Next_Entity (gnat_field))
- ? REALPART_EXPR : IMAGPART_EXPR,
- NULL_TREE, gnu_prefix);
- else
- {
- gnu_field = gnat_to_gnu_entity (gnat_field, NULL_TREE, 0);
+ switch (Nkind (Name (gnat_node)))
+ {
+ case N_Identifier:
+ case N_Operator_Symbol:
+ case N_Expanded_Name:
+ case N_Attribute_Reference:
+ if (Is_Eliminated (Entity (Name (gnat_node))))
+ Eliminate_Error_Msg (gnat_node, Entity (Name (gnat_node)));
+ }
- /* If there are discriminants, the prefix might be
- evaluated more than once, which is a problem if it has
- side-effects. */
+ gcc_assert (TREE_CODE (gnu_subprog_type) == FUNCTION_TYPE);
- if (Has_Discriminants (Is_Access_Type (Etype (Prefix (gnat_node)))
- ? Designated_Type (Etype
- (Prefix (gnat_node)))
- : Etype (Prefix (gnat_node)))
- && TREE_SIDE_EFFECTS (gnu_prefix))
- gnu_prefix = make_save_expr (gnu_prefix);
+ /* If we are calling a stubbed function, make this into a raise of
+ Program_Error. Elaborate all our args first. */
+ if (TREE_CODE (gnu_subprog_node) == FUNCTION_DECL
+ && DECL_STUBBED_P (gnu_subprog_node))
+ {
+ for (gnat_actual = First_Actual (gnat_node);
+ Present (gnat_actual);
+ gnat_actual = Next_Actual (gnat_actual))
+ add_stmt (gnat_to_gnu (gnat_actual));
- /* Emit discriminant check if necessary. */
- if (Do_Discriminant_Check (gnat_node))
- gnu_prefix = emit_discriminant_check (gnu_prefix, gnat_node);
- gnu_result
- = build_component_ref (gnu_prefix, NULL_TREE, gnu_field);
- }
+ if (Nkind (gnat_node) == N_Function_Call && !gnu_target)
+ {
+ *gnu_result_type_p = TREE_TYPE (gnu_subprog_type);
+ return build1 (NULL_EXPR, *gnu_result_type_p,
+ build_call_raise (PE_Stubbed_Subprogram_Called));
+ }
+ else
+ return build_call_raise (PE_Stubbed_Subprogram_Called);
+ }
- if (gnu_result == 0)
- gigi_abort (308);
+ /* If we are calling by supplying a pointer to a target, set up that
+ pointer as the first argument. Use GNU_TARGET if one was passed;
+ otherwise, make a target by building a variable of the maximum size
+ of the type. */
+ if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type))
+ {
+ tree gnu_real_ret_type
+ = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (gnu_subprog_type)));
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- }
- break;
+ if (!gnu_target)
+ {
+ tree gnu_obj_type
+ = maybe_pad_type (gnu_real_ret_type,
+ max_size (TYPE_SIZE (gnu_real_ret_type), true),
+ 0, Etype (Name (gnat_node)), "PAD", false,
+ false, false);
+
+ gnu_target = create_tmp_var_raw (gnu_obj_type, "LR");
+ gnat_pushdecl (gnu_target, gnat_node);
+ }
- case N_Attribute_Reference:
- {
- /* The attribute designator (like an enumeration value). */
- int attribute = Get_Attribute_Id (Attribute_Name (gnat_node));
- int prefix_unused = 0;
- tree gnu_prefix;
- tree gnu_type;
+ gnu_actual_list
+ = tree_cons (NULL_TREE,
+ build_unary_op (ADDR_EXPR, NULL_TREE,
+ unchecked_convert (gnu_real_ret_type,
+ gnu_target,
+ false)),
+ NULL_TREE);
- /* The Elab_Spec and Elab_Body attributes are special in that
- Prefix is a unit, not an object with a GCC equivalent. Similarly
- for Elaborated, since that variable isn't otherwise known. */
- if (attribute == Attr_Elab_Body || attribute == Attr_Elab_Spec)
- {
- gnu_prefix
- = create_subprog_decl
- (create_concat_name (Entity (Prefix (gnat_node)),
- attribute == Attr_Elab_Body
- ? "elabb" : "elabs"),
- NULL_TREE, void_ftype, NULL_TREE, 0, 1, 1, 0);
- return gnu_prefix;
- }
+ }
- gnu_prefix = gnat_to_gnu (Prefix (gnat_node));
- gnu_type = TREE_TYPE (gnu_prefix);
+ /* The only way we can be making a call via an access type is if Name is an
+ explicit dereference. In that case, get the list of formal args from the
+ type the access type is pointing to. Otherwise, get the formals from
+ entity being called. */
+ if (Nkind (Name (gnat_node)) == N_Explicit_Dereference)
+ gnat_formal = First_Formal (Etype (Name (gnat_node)));
+ else if (Nkind (Name (gnat_node)) == N_Attribute_Reference)
+ /* Assume here that this must be 'Elab_Body or 'Elab_Spec. */
+ gnat_formal = 0;
+ else
+ gnat_formal = First_Formal (Entity (Name (gnat_node)));
+
+ /* Create the list of the actual parameters as GCC expects it, namely a chain
+ of TREE_LIST nodes in which the TREE_VALUE field of each node is a
+ parameter-expression and the TREE_PURPOSE field is null. Skip OUT
+ parameters not passed by reference and don't need to be copied in. */
+ for (gnat_actual = First_Actual (gnat_node);
+ Present (gnat_actual);
+ gnat_formal = Next_Formal_With_Extras (gnat_formal),
+ gnat_actual = Next_Actual (gnat_actual))
+ {
+ tree gnu_formal
+ = (present_gnu_tree (gnat_formal)
+ ? get_gnu_tree (gnat_formal) : NULL_TREE);
+ /* We treat a conversion between aggregate types as if it is an
+ unchecked conversion. */
+ bool unchecked_convert_p
+ = (Nkind (gnat_actual) == N_Unchecked_Type_Conversion
+ || (Nkind (gnat_actual) == N_Type_Conversion
+ && Is_Composite_Type (Underlying_Type (Etype (gnat_formal)))));
+ Node_Id gnat_name = (unchecked_convert_p
+ ? Expression (gnat_actual) : gnat_actual);
+ tree gnu_name = gnat_to_gnu (gnat_name);
+ tree gnu_name_type = gnat_to_gnu_type (Etype (gnat_name));
+ tree gnu_actual;
+ tree gnu_formal_type;
+
+ /* If it's possible we may need to use this expression twice, make sure
+ than any side-effects are handled via SAVE_EXPRs. Likewise if we need
+ to force side-effects before the call.
+
+ ??? This is more conservative than we need since we don't need to do
+ this for pass-by-ref with no conversion. If we are passing a
+ non-addressable Out or In Out parameter by reference, pass the address
+ of a copy and set up to copy back out after the call. */
+ if (Ekind (gnat_formal) != E_In_Parameter)
+ {
+ gnu_name = gnat_stabilize_reference (gnu_name, true);
+ if (!addressable_p (gnu_name)
+ && gnu_formal
+ && (DECL_BY_REF_P (gnu_formal)
+ || (TREE_CODE (gnu_formal) == PARM_DECL
+ && (DECL_BY_COMPONENT_PTR_P (gnu_formal)
+ || (DECL_BY_DESCRIPTOR_P (gnu_formal))))))
+ {
+ tree gnu_copy = gnu_name;
+ tree gnu_temp;
+
+ /* Remove any unpadding on the actual and make a copy. But if
+ the actual is a justified modular type, first convert
+ to it. */
+ if (TREE_CODE (gnu_name) == COMPONENT_REF
+ && ((TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_name, 0)))
+ == RECORD_TYPE)
+ && (TYPE_IS_PADDING_P
+ (TREE_TYPE (TREE_OPERAND (gnu_name, 0))))))
+ gnu_name = gnu_copy = TREE_OPERAND (gnu_name, 0);
+ else if (TREE_CODE (gnu_name_type) == RECORD_TYPE
+ && (TYPE_JUSTIFIED_MODULAR_P (gnu_name_type)))
+ gnu_name = convert (gnu_name_type, gnu_name);
+
+ gnu_actual = save_expr (gnu_name);
+
+ /* Since we're going to take the address of the SAVE_EXPR, we
+ don't want it to be marked as unchanging. So set
+ TREE_ADDRESSABLE. */
+ gnu_temp = skip_simple_arithmetic (gnu_actual);
+ if (TREE_CODE (gnu_temp) == SAVE_EXPR)
+ {
+ TREE_ADDRESSABLE (gnu_temp) = 1;
+ TREE_READONLY (gnu_temp) = 0;
+ }
- /* If the input is a NULL_EXPR, make a new one. */
- if (TREE_CODE (gnu_prefix) == NULL_EXPR)
- {
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result = build1 (NULL_EXPR, gnu_result_type,
- TREE_OPERAND (gnu_prefix, 0));
- break;
- }
+ /* Set up to move the copy back to the original. */
+ gnu_temp = build2 (MODIFY_EXPR, TREE_TYPE (gnu_copy),
+ gnu_copy, gnu_actual);
+ annotate_with_node (gnu_temp, gnat_actual);
+ append_to_statement_list (gnu_temp, &gnu_after_list);
+ }
+ }
- switch (attribute)
- {
- case Attr_Pos:
- case Attr_Val:
- /* These are just conversions until since representation
- clauses for enumerations are handled in the front end. */
+ /* If this was a procedure call, we may not have removed any padding.
+ So do it here for the part we will use as an input, if any. */
+ gnu_actual = gnu_name;
+ if (Ekind (gnat_formal) != E_Out_Parameter
+ && TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual)))
+ gnu_actual = convert (get_unpadded_type (Etype (gnat_actual)),
+ gnu_actual);
+
+ /* Unless this is an In parameter, we must remove any LJM building
+ from GNU_NAME. */
+ if (Ekind (gnat_formal) != E_In_Parameter
+ && TREE_CODE (gnu_name) == CONSTRUCTOR
+ && TREE_CODE (TREE_TYPE (gnu_name)) == RECORD_TYPE
+ && TYPE_JUSTIFIED_MODULAR_P (TREE_TYPE (gnu_name)))
+ gnu_name = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_name))),
+ gnu_name);
+
+ if (Ekind (gnat_formal) != E_Out_Parameter
+ && !unchecked_convert_p
+ && Do_Range_Check (gnat_actual))
+ gnu_actual = emit_range_check (gnu_actual, Etype (gnat_formal));
+
+ /* Do any needed conversions. We need only check for unchecked
+ conversion since normal conversions will be handled by just
+ converting to the formal type. */
+ if (unchecked_convert_p)
+ {
+ gnu_actual
+ = unchecked_convert (gnat_to_gnu_type (Etype (gnat_actual)),
+ gnu_actual,
+ (Nkind (gnat_actual)
+ == N_Unchecked_Type_Conversion)
+ && No_Truncation (gnat_actual));
+
+ /* One we've done the unchecked conversion, we still must ensure that
+ the object is in range of the formal's type. */
+ if (Ekind (gnat_formal) != E_Out_Parameter
+ && Do_Range_Check (gnat_actual))
+ gnu_actual = emit_range_check (gnu_actual,
+ Etype (gnat_formal));
+ }
+ else if (TREE_CODE (gnu_actual) != SAVE_EXPR)
+ /* We may have suppressed a conversion to the Etype of the actual since
+ the parent is a procedure call. So add the conversion here. */
+ gnu_actual = convert (gnat_to_gnu_type (Etype (gnat_actual)),
+ gnu_actual);
+
+ /* If we have not saved a GCC object for the formal, it means it is an
+ OUT parameter not passed by reference and that does not need to be
+ copied in. Otherwise, look at the PARM_DECL to see if it is passed by
+ reference. */
+ if (gnu_formal
+ && TREE_CODE (gnu_formal) == PARM_DECL && DECL_BY_REF_P (gnu_formal))
+ {
+ if (Ekind (gnat_formal) != E_In_Parameter)
{
- int check_p = Do_Range_Check (First (Expressions (gnat_node)));
-
- gnu_result = gnat_to_gnu (First (Expressions (gnat_node)));
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result = convert_with_check (Etype (gnat_node), gnu_result,
- check_p, check_p, 1);
+ gnu_actual = gnu_name;
+
+ /* If we have a padded type, be sure we've removed padding. */
+ if (TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual))
+ && TREE_CODE (gnu_actual) != SAVE_EXPR)
+ gnu_actual = convert (get_unpadded_type (Etype (gnat_actual)),
+ gnu_actual);
+
+ /* If we have the constructed subtype of an aliased object
+ with an unconstrained nominal subtype, the type of the
+ actual includes the template, although it is formally
+ constrained. So we need to convert it back to the real
+ constructed subtype to retrieve the constrained part
+ and takes its address. */
+ if (TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE
+ && TYPE_CONTAINS_TEMPLATE_P (TREE_TYPE (gnu_actual))
+ && TREE_CODE (gnu_actual) != SAVE_EXPR
+ && Is_Constr_Subt_For_UN_Aliased (Etype (gnat_actual))
+ && Is_Array_Type (Etype (gnat_actual)))
+ gnu_actual = convert (gnat_to_gnu_type (Etype (gnat_actual)),
+ gnu_actual);
}
- break;
- case Attr_Pred:
- case Attr_Succ:
- /* These just add or subject the constant 1. Representation
- clauses for enumerations are handled in the front-end. */
- gnu_expr = gnat_to_gnu (First (Expressions (gnat_node)));
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ /* Otherwise, if we have a non-addressable COMPONENT_REF of a
+ variable-size type see if it's doing a unpadding operation. If
+ so, remove that operation since we have no way of allocating the
+ required temporary. */
+ if (TREE_CODE (gnu_actual) == COMPONENT_REF
+ && !TREE_CONSTANT (TYPE_SIZE (TREE_TYPE (gnu_actual)))
+ && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_actual, 0)))
+ == RECORD_TYPE)
+ && TYPE_IS_PADDING_P (TREE_TYPE
+ (TREE_OPERAND (gnu_actual, 0)))
+ && !addressable_p (gnu_actual))
+ gnu_actual = TREE_OPERAND (gnu_actual, 0);
+
+ /* The symmetry of the paths to the type of an entity is broken here
+ since arguments don't know that they will be passed by ref. */
+ gnu_formal_type = TREE_TYPE (get_gnu_tree (gnat_formal));
+ gnu_actual = build_unary_op (ADDR_EXPR, gnu_formal_type, gnu_actual);
+ }
+ else if (gnu_formal && TREE_CODE (gnu_formal) == PARM_DECL
+ && DECL_BY_COMPONENT_PTR_P (gnu_formal))
+ {
+ gnu_formal_type = TREE_TYPE (get_gnu_tree (gnat_formal));
+ gnu_actual = maybe_implicit_deref (gnu_actual);
+ gnu_actual = maybe_unconstrained_array (gnu_actual);
- if (Do_Range_Check (First (Expressions (gnat_node))))
- {
- gnu_expr = make_save_expr (gnu_expr);
- gnu_expr
- = emit_check
- (build_binary_op (EQ_EXPR, integer_type_node,
- gnu_expr,
- attribute == Attr_Pred
- ? TYPE_MIN_VALUE (gnu_result_type)
- : TYPE_MAX_VALUE (gnu_result_type)),
- gnu_expr);
- }
+ if (TREE_CODE (gnu_formal_type) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (gnu_formal_type))
+ {
+ gnu_formal_type = TREE_TYPE (TYPE_FIELDS (gnu_formal_type));
+ gnu_actual = convert (gnu_formal_type, gnu_actual);
+ }
- gnu_result
- = build_binary_op (attribute == Attr_Pred
- ? MINUS_EXPR : PLUS_EXPR,
- gnu_result_type, gnu_expr,
- convert (gnu_result_type, integer_one_node));
- break;
+ /* Take the address of the object and convert to the proper pointer
+ type. We'd like to actually compute the address of the beginning
+ of the array using an ADDR_EXPR of an ARRAY_REF, but there's a
+ possibility that the ARRAY_REF might return a constant and we'd be
+ getting the wrong address. Neither approach is exactly correct,
+ but this is the most likely to work in all cases. */
+ gnu_actual = convert (gnu_formal_type,
+ build_unary_op (ADDR_EXPR, NULL_TREE,
+ gnu_actual));
+ }
+ else if (gnu_formal && TREE_CODE (gnu_formal) == PARM_DECL
+ && DECL_BY_DESCRIPTOR_P (gnu_formal))
+ {
+ /* If arg is 'Null_Parameter, pass zero descriptor. */
+ if ((TREE_CODE (gnu_actual) == INDIRECT_REF
+ || TREE_CODE (gnu_actual) == UNCONSTRAINED_ARRAY_REF)
+ && TREE_PRIVATE (gnu_actual))
+ gnu_actual = convert (DECL_ARG_TYPE (get_gnu_tree (gnat_formal)),
+ integer_zero_node);
+ else
+ gnu_actual = build_unary_op (ADDR_EXPR, NULL_TREE,
+ fill_vms_descriptor (gnu_actual,
+ gnat_formal));
+ }
+ else
+ {
+ tree gnu_actual_size = TYPE_SIZE (TREE_TYPE (gnu_actual));
- case Attr_Address:
- case Attr_Unrestricted_Access:
+ if (Ekind (gnat_formal) != E_In_Parameter)
+ gnu_name_list = tree_cons (NULL_TREE, gnu_name, gnu_name_list);
- /* Conversions don't change something's address but can cause
- us to miss the COMPONENT_REF case below, so strip them off. */
- gnu_prefix = remove_conversions (gnu_prefix);
+ if (!gnu_formal || TREE_CODE (gnu_formal) != PARM_DECL)
+ continue;
- /* If we are taking 'Address of an unconstrained object,
- this is the pointer to the underlying array. */
- gnu_prefix = maybe_unconstrained_array (gnu_prefix);
+ /* If this is 'Null_Parameter, pass a zero even though we are
+ dereferencing it. */
+ else if (TREE_CODE (gnu_actual) == INDIRECT_REF
+ && TREE_PRIVATE (gnu_actual)
+ && host_integerp (gnu_actual_size, 1)
+ && 0 >= compare_tree_int (gnu_actual_size,
+ BITS_PER_WORD))
+ gnu_actual
+ = unchecked_convert (DECL_ARG_TYPE (gnu_formal),
+ convert (gnat_type_for_size
+ (tree_low_cst (gnu_actual_size, 1),
+ 1),
+ integer_zero_node),
+ false);
+ else
+ gnu_actual = convert (DECL_ARG_TYPE (gnu_formal), gnu_actual);
+ }
- /* ... fall through ... */
+ gnu_actual_list = tree_cons (NULL_TREE, gnu_actual, gnu_actual_list);
+ }
- case Attr_Access:
- case Attr_Unchecked_Access:
- case Attr_Code_Address:
+ gnu_subprog_call = build3 (CALL_EXPR, TREE_TYPE (gnu_subprog_type),
+ gnu_subprog_addr, nreverse (gnu_actual_list),
+ NULL_TREE);
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result
- = build_unary_op (attribute == Attr_Address
- || attribute == Attr_Unrestricted_Access
- ? ATTR_ADDR_EXPR : ADDR_EXPR,
- gnu_result_type, gnu_prefix);
-
- /* For 'Code_Address, find an inner ADDR_EXPR and mark it
- so that we don't try to build a trampoline. */
- if (attribute == Attr_Code_Address)
- {
- for (gnu_expr = gnu_result;
- TREE_CODE (gnu_expr) == NOP_EXPR
- || TREE_CODE (gnu_expr) == CONVERT_EXPR;
- gnu_expr = TREE_OPERAND (gnu_expr, 0))
- TREE_CONSTANT (gnu_expr) = 1;
- ;
-
- if (TREE_CODE (gnu_expr) == ADDR_EXPR)
- TREE_STATIC (gnu_expr) = TREE_CONSTANT (gnu_expr) = 1;
- }
+ /* If we return by passing a target, we emit the call and return the target
+ as our result. */
+ if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type))
+ {
+ add_stmt_with_node (gnu_subprog_call, gnat_node);
+ *gnu_result_type_p
+ = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (gnu_subprog_type)));
+ return unchecked_convert (*gnu_result_type_p, gnu_target, false);
+ }
- break;
+ /* If it is a function call, the result is the call expression unless
+ a target is specified, in which case we copy the result into the target
+ and return the assignment statement. */
+ else if (Nkind (gnat_node) == N_Function_Call)
+ {
+ gnu_result = gnu_subprog_call;
- case Attr_Size:
- case Attr_Object_Size:
- case Attr_Value_Size:
- case Attr_Max_Size_In_Storage_Elements:
+ /* If the function returns an unconstrained array or by reference,
+ we have to de-dereference the pointer. */
+ if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type)
+ || TYPE_RETURNS_BY_REF_P (gnu_subprog_type))
+ gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_result);
- gnu_expr = gnu_prefix;
+ if (gnu_target)
+ gnu_result = build_binary_op (MODIFY_EXPR, NULL_TREE,
+ gnu_target, gnu_result);
+ else
+ *gnu_result_type_p = get_unpadded_type (Etype (gnat_node));
- /* Remove NOPS from gnu_expr and conversions from gnu_prefix.
- We only use GNU_EXPR to see if a COMPONENT_REF was involved. */
- while (TREE_CODE (gnu_expr) == NOP_EXPR)
- gnu_expr = TREE_OPERAND (gnu_expr, 0);
+ return gnu_result;
+ }
- gnu_prefix = remove_conversions (gnu_prefix);
- prefix_unused = 1;
- gnu_type = TREE_TYPE (gnu_prefix);
+ /* If this is the case where the GNAT tree contains a procedure call
+ but the Ada procedure has copy in copy out parameters, the special
+ parameter passing mechanism must be used. */
+ else if (TYPE_CI_CO_LIST (gnu_subprog_type) != NULL_TREE)
+ {
+ /* List of FIELD_DECLs associated with the PARM_DECLs of the copy
+ in copy out parameters. */
+ tree scalar_return_list = TYPE_CI_CO_LIST (gnu_subprog_type);
+ int length = list_length (scalar_return_list);
- /* Replace an unconstrained array type with the type of the
- underlying array. We can't do this with a call to
- maybe_unconstrained_array since we may have a TYPE_DECL.
- For 'Max_Size_In_Storage_Elements, use the record type
- that will be used to allocate the object and its template. */
+ if (length > 1)
+ {
+ tree gnu_name;
+
+ gnu_subprog_call = save_expr (gnu_subprog_call);
+ gnu_name_list = nreverse (gnu_name_list);
+
+ /* If any of the names had side-effects, ensure they are all
+ evaluated before the call. */
+ for (gnu_name = gnu_name_list; gnu_name;
+ gnu_name = TREE_CHAIN (gnu_name))
+ if (TREE_SIDE_EFFECTS (TREE_VALUE (gnu_name)))
+ append_to_statement_list (TREE_VALUE (gnu_name),
+ &gnu_before_list);
+ }
- if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE)
+ if (Nkind (Name (gnat_node)) == N_Explicit_Dereference)
+ gnat_formal = First_Formal (Etype (Name (gnat_node)));
+ else
+ gnat_formal = First_Formal (Entity (Name (gnat_node)));
+
+ for (gnat_actual = First_Actual (gnat_node);
+ Present (gnat_actual);
+ gnat_formal = Next_Formal_With_Extras (gnat_formal),
+ gnat_actual = Next_Actual (gnat_actual))
+ /* If we are dealing with a copy in copy out parameter, we must
+ retrieve its value from the record returned in the call. */
+ if (!(present_gnu_tree (gnat_formal)
+ && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL
+ && (DECL_BY_REF_P (get_gnu_tree (gnat_formal))
+ || (TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL
+ && ((DECL_BY_COMPONENT_PTR_P (get_gnu_tree (gnat_formal))
+ || (DECL_BY_DESCRIPTOR_P
+ (get_gnu_tree (gnat_formal))))))))
+ && Ekind (gnat_formal) != E_In_Parameter)
+ {
+ /* Get the value to assign to this OUT or IN OUT parameter. It is
+ either the result of the function if there is only a single such
+ parameter or the appropriate field from the record returned. */
+ tree gnu_result
+ = length == 1 ? gnu_subprog_call
+ : build_component_ref (gnu_subprog_call, NULL_TREE,
+ TREE_PURPOSE (scalar_return_list),
+ false);
+ bool unchecked_conversion = (Nkind (gnat_actual)
+ == N_Unchecked_Type_Conversion);
+ /* If the actual is a conversion, get the inner expression, which
+ will be the real destination, and convert the result to the
+ type of the actual parameter. */
+ tree gnu_actual
+ = maybe_unconstrained_array (TREE_VALUE (gnu_name_list));
+
+ /* If the result is a padded type, remove the padding. */
+ if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result)))
+ gnu_result = convert (TREE_TYPE (TYPE_FIELDS
+ (TREE_TYPE (gnu_result))),
+ gnu_result);
+
+ /* If the result is a type conversion, do it. */
+ if (Nkind (gnat_actual) == N_Type_Conversion)
+ gnu_result
+ = convert_with_check
+ (Etype (Expression (gnat_actual)), gnu_result,
+ Do_Overflow_Check (gnat_actual),
+ Do_Range_Check (Expression (gnat_actual)),
+ Float_Truncate (gnat_actual));
+
+ else if (unchecked_conversion)
+ gnu_result = unchecked_convert (TREE_TYPE (gnu_actual),
+ gnu_result,
+ No_Truncation (gnat_actual));
+ else
{
- gnu_type = TYPE_OBJECT_RECORD_TYPE (gnu_type);
- if (attribute != Attr_Max_Size_In_Storage_Elements)
- gnu_type = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_type)));
- }
+ if (Do_Range_Check (gnat_actual))
+ gnu_result = emit_range_check (gnu_result,
+ Etype (gnat_actual));
- /* If we are looking for the size of a field, return the
- field size. Otherwise, if the prefix is an object,
- or if 'Object_Size or 'Max_Size_In_Storage_Elements has
- been specified, the result is the GCC size of the type.
- Otherwise, the result is the RM_Size of the type. */
- if (TREE_CODE (gnu_prefix) == COMPONENT_REF)
- gnu_result = DECL_SIZE (TREE_OPERAND (gnu_prefix, 1));
- else if (TREE_CODE (gnu_prefix) != TYPE_DECL
- || attribute == Attr_Object_Size
- || attribute == Attr_Max_Size_In_Storage_Elements)
- {
- /* If this is a padded type, the GCC size isn't relevant
- to the programmer. Normally, what we want is the RM_Size,
- which was set from the specified size, but if it was not
- set, we want the size of the relevant field. Using the MAX
- of those two produces the right result in all case. Don't
- use the size of the field if it's a self-referential type,
- since that's never what's wanted. */
- if (TREE_CODE (gnu_type) == RECORD_TYPE
- && TYPE_IS_PADDING_P (gnu_type)
- && TREE_CODE (gnu_expr) == COMPONENT_REF)
- {
- gnu_result = rm_size (gnu_type);
- if (! (contains_placeholder_p
- (DECL_SIZE (TREE_OPERAND (gnu_expr, 1)))))
- gnu_result
- = size_binop (MAX_EXPR, gnu_result,
- DECL_SIZE (TREE_OPERAND (gnu_expr, 1)));
- }
- else
- gnu_result = TYPE_SIZE (gnu_type);
+ if (!(!TREE_CONSTANT (TYPE_SIZE (TREE_TYPE (gnu_actual)))
+ && TREE_CONSTANT (TYPE_SIZE (TREE_TYPE (gnu_result)))))
+ gnu_result = convert (TREE_TYPE (gnu_actual), gnu_result);
}
- else
- gnu_result = rm_size (gnu_type);
+
+ gnu_result = build_binary_op (MODIFY_EXPR, NULL_TREE,
+ gnu_actual, gnu_result);
+ annotate_with_node (gnu_result, gnat_actual);
+ append_to_statement_list (gnu_result, &gnu_before_list);
+ scalar_return_list = TREE_CHAIN (scalar_return_list);
+ gnu_name_list = TREE_CHAIN (gnu_name_list);
+ }
+ }
+ else
+ {
+ annotate_with_node (gnu_subprog_call, gnat_node);
+ append_to_statement_list (gnu_subprog_call, &gnu_before_list);
+ }
- if (gnu_result == 0)
- gigi_abort (325);
+ append_to_statement_list (gnu_after_list, &gnu_before_list);
+ return gnu_before_list;
+}
+\f
+/* Subroutine of gnat_to_gnu to translate gnat_node, an
+ N_Handled_Sequence_Of_Statements, to a GCC tree, which is returned. */
- /* Deal with a self-referential size by returning the maximum
- size for a type and by qualifying the size with
- the object for 'Size of an object. */
+static tree
+Handled_Sequence_Of_Statements_to_gnu (Node_Id gnat_node)
+{
+ tree gnu_jmpsave_decl = NULL_TREE;
+ tree gnu_jmpbuf_decl = NULL_TREE;
+ /* If just annotating, ignore all EH and cleanups. */
+ bool gcc_zcx = (!type_annotate_only
+ && Present (Exception_Handlers (gnat_node))
+ && Exception_Mechanism == GCC_ZCX);
+ bool setjmp_longjmp
+ = (!type_annotate_only && Present (Exception_Handlers (gnat_node))
+ && Exception_Mechanism == Setjmp_Longjmp);
+ bool at_end = !type_annotate_only && Present (At_End_Proc (gnat_node));
+ bool binding_for_block = (at_end || gcc_zcx || setjmp_longjmp);
+ tree gnu_inner_block; /* The statement(s) for the block itself. */
+ tree gnu_result;
+ tree gnu_expr;
+ Node_Id gnat_temp;
- if (TREE_CODE (gnu_result) != INTEGER_CST
- && contains_placeholder_p (gnu_result))
- {
- if (TREE_CODE (gnu_prefix) != TYPE_DECL)
- gnu_result = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_result),
- gnu_result, gnu_prefix);
- else
- gnu_result = max_size (gnu_result, 1);
- }
+ /* The GCC exception handling mechanism can handle both ZCX and SJLJ schemes
+ and we have our own SJLJ mechanism. To call the GCC mechanism, we call
+ add_cleanup, and when we leave the binding, end_stmt_group will create
+ the TRY_FINALLY_EXPR.
+
+ ??? The region level calls down there have been specifically put in place
+ for a ZCX context and currently the order in which things are emitted
+ (region/handlers) is different from the SJLJ case. Instead of putting
+ other calls with different conditions at other places for the SJLJ case,
+ it seems cleaner to reorder things for the SJLJ case and generalize the
+ condition to make it not ZCX specific.
+
+ If there are any exceptions or cleanup processing involved, we need an
+ outer statement group (for Setjmp_Longjmp) and binding level. */
+ if (binding_for_block)
+ {
+ start_stmt_group ();
+ gnat_pushlevel ();
+ }
- /* If the type contains a template, subtract the size of the
- template. */
- if (TREE_CODE (gnu_type) == RECORD_TYPE
- && TYPE_CONTAINS_TEMPLATE_P (gnu_type))
- gnu_result = size_binop (MINUS_EXPR, gnu_result,
- DECL_SIZE (TYPE_FIELDS (gnu_type)));
-
- /* If the type contains a template, subtract the size of the
- template. */
- if (TREE_CODE (gnu_type) == RECORD_TYPE
- && TYPE_CONTAINS_TEMPLATE_P (gnu_type))
- gnu_result = size_binop (MINUS_EXPR, gnu_result,
- DECL_SIZE (TYPE_FIELDS (gnu_type)));
-
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
-
- /* Always perform division using unsigned arithmetic as the
- size cannot be negative, but may be an overflowed positive
- value. This provides correct results for sizes up to 512 MB.
- ??? Size should be calculated in storage elements directly. */
-
- if (attribute == Attr_Max_Size_In_Storage_Elements)
- gnu_result = convert (sizetype,
- fold (build (CEIL_DIV_EXPR, bitsizetype,
- gnu_result,
- bitsize_unit_node)));
- break;
+ /* If we are to call a function when exiting this block add a cleanup
+ to the binding level we made above. */
+ if (at_end)
+ add_cleanup (build_call_0_expr (gnat_to_gnu (At_End_Proc (gnat_node))));
- case Attr_Alignment:
- if (TREE_CODE (gnu_prefix) == COMPONENT_REF
- && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))
- == RECORD_TYPE)
- && (TYPE_IS_PADDING_P
- (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))))
- gnu_prefix = TREE_OPERAND (gnu_prefix, 0);
+ /* If using setjmp_longjmp, make the variables for the setjmp buffer and save
+ area for address of previous buffer. Do this first since we need to have
+ the setjmp buf known for any decls in this block. */
+ if (setjmp_longjmp)
+ {
+ gnu_jmpsave_decl = create_var_decl (get_identifier ("JMPBUF_SAVE"),
+ NULL_TREE, jmpbuf_ptr_type,
+ build_call_0_expr (get_jmpbuf_decl),
+ false, false, false, false, NULL,
+ gnat_node);
+ gnu_jmpbuf_decl = create_var_decl (get_identifier ("JMP_BUF"),
+ NULL_TREE, jmpbuf_type,
+ NULL_TREE, false, false, false, false,
+ NULL, gnat_node);
+
+ set_block_jmpbuf_decl (gnu_jmpbuf_decl);
+
+ /* When we exit this block, restore the saved value. */
+ add_cleanup (build_call_1_expr (set_jmpbuf_decl, gnu_jmpsave_decl));
+ }
- gnu_type = TREE_TYPE (gnu_prefix);
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- prefix_unused = 1;
+ /* Now build the tree for the declarations and statements inside this block.
+ If this is SJLJ, set our jmp_buf as the current buffer. */
+ start_stmt_group ();
+
+ if (setjmp_longjmp)
+ add_stmt (build_call_1_expr (set_jmpbuf_decl,
+ build_unary_op (ADDR_EXPR, NULL_TREE,
+ gnu_jmpbuf_decl)));
+
+ if (Present (First_Real_Statement (gnat_node)))
+ process_decls (Statements (gnat_node), Empty,
+ First_Real_Statement (gnat_node), true, true);
+
+ /* Generate code for each statement in the block. */
+ for (gnat_temp = (Present (First_Real_Statement (gnat_node))
+ ? First_Real_Statement (gnat_node)
+ : First (Statements (gnat_node)));
+ Present (gnat_temp); gnat_temp = Next (gnat_temp))
+ add_stmt (gnat_to_gnu (gnat_temp));
+ gnu_inner_block = end_stmt_group ();
+
+ /* Now generate code for the two exception models, if either is relevant for
+ this block. */
+ if (setjmp_longjmp)
+ {
+ tree *gnu_else_ptr = 0;
+ tree gnu_handler;
+
+ /* Make a binding level for the exception handling declarations and code
+ and set up gnu_except_ptr_stack for the handlers to use. */
+ start_stmt_group ();
+ gnat_pushlevel ();
+
+ push_stack (&gnu_except_ptr_stack, NULL_TREE,
+ create_var_decl (get_identifier ("EXCEPT_PTR"),
+ NULL_TREE,
+ build_pointer_type (except_type_node),
+ build_call_0_expr (get_excptr_decl), false,
+ false, false, false, NULL, gnat_node));
+
+ /* Generate code for each handler. The N_Exception_Handler case does the
+ real work and returns a COND_EXPR for each handler, which we chain
+ together here. */
+ for (gnat_temp = First_Non_Pragma (Exception_Handlers (gnat_node));
+ Present (gnat_temp); gnat_temp = Next_Non_Pragma (gnat_temp))
+ {
+ gnu_expr = gnat_to_gnu (gnat_temp);
- if (TREE_CODE (gnu_prefix) == COMPONENT_REF)
- gnu_result
- = size_int (DECL_ALIGN (TREE_OPERAND (gnu_prefix, 1)));
- else
- gnu_result = size_int (TYPE_ALIGN (gnu_type) / BITS_PER_UNIT);
- break;
+ /* If this is the first one, set it as the outer one. Otherwise,
+ point the "else" part of the previous handler to us. Then point
+ to our "else" part. */
+ if (!gnu_else_ptr)
+ add_stmt (gnu_expr);
+ else
+ *gnu_else_ptr = gnu_expr;
- case Attr_First:
- case Attr_Last:
- case Attr_Range_Length:
- prefix_unused = 1;
+ gnu_else_ptr = &COND_EXPR_ELSE (gnu_expr);
+ }
- if (INTEGRAL_TYPE_P (gnu_type)
- || TREE_CODE (gnu_type) == REAL_TYPE)
- {
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ /* If none of the exception handlers did anything, re-raise but do not
+ defer abortion. */
+ gnu_expr = build_call_1_expr (raise_nodefer_decl,
+ TREE_VALUE (gnu_except_ptr_stack));
+ annotate_with_node (gnu_expr, gnat_node);
- if (attribute == Attr_First)
- gnu_result = TYPE_MIN_VALUE (gnu_type);
- else if (attribute == Attr_Last)
- gnu_result = TYPE_MAX_VALUE (gnu_type);
- else
- gnu_result
- = build_binary_op
- (MAX_EXPR, get_base_type (gnu_result_type),
- build_binary_op
- (PLUS_EXPR, get_base_type (gnu_result_type),
- build_binary_op (MINUS_EXPR,
- get_base_type (gnu_result_type),
- convert (gnu_result_type,
- TYPE_MAX_VALUE (gnu_type)),
- convert (gnu_result_type,
- TYPE_MIN_VALUE (gnu_type))),
- convert (gnu_result_type, integer_one_node)),
- convert (gnu_result_type, integer_zero_node));
-
- break;
- }
- /* ... fall through ... */
- case Attr_Length:
- {
- int Dimension
- = (Present (Expressions (gnat_node))
- ? UI_To_Int (Intval (First (Expressions (gnat_node))))
- : 1);
-
- /* Emit access check if necessary */
- if (Do_Access_Check (gnat_node))
- gnu_prefix = emit_access_check (gnu_prefix);
-
- /* Make sure any implicit dereference gets done. */
- gnu_prefix = maybe_implicit_deref (gnu_prefix);
- gnu_prefix = maybe_unconstrained_array (gnu_prefix);
- gnu_type = TREE_TYPE (gnu_prefix);
- prefix_unused = 1;
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
-
- if (TYPE_CONVENTION_FORTRAN_P (gnu_type))
- {
- int ndim;
- tree gnu_type_temp;
+ if (gnu_else_ptr)
+ *gnu_else_ptr = gnu_expr;
+ else
+ add_stmt (gnu_expr);
+
+ /* End the binding level dedicated to the exception handlers and get the
+ whole statement group. */
+ pop_stack (&gnu_except_ptr_stack);
+ gnat_poplevel ();
+ gnu_handler = end_stmt_group ();
+
+ /* If the setjmp returns 1, we restore our incoming longjmp value and
+ then check the handlers. */
+ start_stmt_group ();
+ add_stmt_with_node (build_call_1_expr (set_jmpbuf_decl,
+ gnu_jmpsave_decl),
+ gnat_node);
+ add_stmt (gnu_handler);
+ gnu_handler = end_stmt_group ();
+
+ /* This block is now "if (setjmp) ... <handlers> else <block>". */
+ gnu_result = build3 (COND_EXPR, void_type_node,
+ (build_call_1_expr
+ (setjmp_decl,
+ build_unary_op (ADDR_EXPR, NULL_TREE,
+ gnu_jmpbuf_decl))),
+ gnu_handler, gnu_inner_block);
+ }
+ else if (gcc_zcx)
+ {
+ tree gnu_handlers;
- for (ndim = 1, gnu_type_temp = gnu_type;
- TREE_CODE (TREE_TYPE (gnu_type_temp)) == ARRAY_TYPE
- && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type_temp));
- ndim++, gnu_type_temp = TREE_TYPE (gnu_type_temp))
- ;
+ /* First make a block containing the handlers. */
+ start_stmt_group ();
+ for (gnat_temp = First_Non_Pragma (Exception_Handlers (gnat_node));
+ Present (gnat_temp);
+ gnat_temp = Next_Non_Pragma (gnat_temp))
+ add_stmt (gnat_to_gnu (gnat_temp));
+ gnu_handlers = end_stmt_group ();
- Dimension = ndim + 1 - Dimension;
- }
+ /* Now make the TRY_CATCH_EXPR for the block. */
+ gnu_result = build2 (TRY_CATCH_EXPR, void_type_node,
+ gnu_inner_block, gnu_handlers);
+ }
+ else
+ gnu_result = gnu_inner_block;
- for (; Dimension > 1; Dimension--)
- gnu_type = TREE_TYPE (gnu_type);
+ /* Now close our outer block, if we had to make one. */
+ if (binding_for_block)
+ {
+ add_stmt (gnu_result);
+ gnat_poplevel ();
+ gnu_result = end_stmt_group ();
+ }
- if (TREE_CODE (gnu_type) != ARRAY_TYPE)
- gigi_abort (309);
+ return gnu_result;
+}
+\f
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Exception_Handler,
+ to a GCC tree, which is returned. This is the variant for Setjmp_Longjmp
+ exception handling. */
- if (attribute == Attr_First)
- gnu_result
- = TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)));
- else if (attribute == Attr_Last)
- gnu_result
- = TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)));
- else
- /* 'Length or 'Range_Length. */
- {
- tree gnu_compute_type
- = signed_or_unsigned_type
- (0, get_base_type (gnu_result_type));
-
- gnu_result
- = build_binary_op
- (MAX_EXPR, gnu_compute_type,
- build_binary_op
- (PLUS_EXPR, gnu_compute_type,
- build_binary_op
- (MINUS_EXPR, gnu_compute_type,
- convert (gnu_compute_type,
- TYPE_MAX_VALUE
- (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type)))),
- convert (gnu_compute_type,
- TYPE_MIN_VALUE
- (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))))),
- convert (gnu_compute_type, integer_one_node)),
- convert (gnu_compute_type, integer_zero_node));
- }
+static tree
+Exception_Handler_to_gnu_sjlj (Node_Id gnat_node)
+{
+ /* Unless this is "Others" or the special "Non-Ada" exception for Ada, make
+ an "if" statement to select the proper exceptions. For "Others", exclude
+ exceptions where Handled_By_Others is nonzero unless the All_Others flag
+ is set. For "Non-ada", accept an exception if "Lang" is 'V'. */
+ tree gnu_choice = integer_zero_node;
+ tree gnu_body = build_stmt_group (Statements (gnat_node), false);
+ Node_Id gnat_temp;
- /* If this has a PLACEHOLDER_EXPR, qualify it by the object
- we are handling. Note that these attributes could not
- have been used on an unconstrained array type. */
- if (TREE_CODE (gnu_result) != INTEGER_CST
- && contains_placeholder_p (gnu_result))
- gnu_result = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_result),
- gnu_result, gnu_prefix);
+ for (gnat_temp = First (Exception_Choices (gnat_node));
+ gnat_temp; gnat_temp = Next (gnat_temp))
+ {
+ tree this_choice;
- break;
- }
+ if (Nkind (gnat_temp) == N_Others_Choice)
+ {
+ if (All_Others (gnat_temp))
+ this_choice = integer_one_node;
+ else
+ this_choice
+ = build_binary_op
+ (EQ_EXPR, integer_type_node,
+ convert
+ (integer_type_node,
+ build_component_ref
+ (build_unary_op
+ (INDIRECT_REF, NULL_TREE,
+ TREE_VALUE (gnu_except_ptr_stack)),
+ get_identifier ("not_handled_by_others"), NULL_TREE,
+ false)),
+ integer_zero_node);
+ }
- case Attr_Bit_Position:
- case Attr_Position:
- case Attr_First_Bit:
- case Attr_Last_Bit:
- case Attr_Bit:
- {
- HOST_WIDE_INT bitsize;
- HOST_WIDE_INT bitpos;
- tree gnu_offset;
- tree gnu_field_bitpos;
- tree gnu_field_offset;
- tree gnu_inner;
- enum machine_mode mode;
- int unsignedp, volatilep;
- unsigned int alignment;
-
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_prefix = remove_conversions (gnu_prefix);
- prefix_unused = 1;
-
- /* We can have 'Bit on any object, but if it isn't a
- COMPONENT_REF, the result is zero. Do not allow
- 'Bit on a bare component, though. */
- if (attribute == Attr_Bit
- && TREE_CODE (gnu_prefix) != COMPONENT_REF
- && TREE_CODE (gnu_prefix) != FIELD_DECL)
- {
- gnu_result = integer_zero_node;
- break;
- }
+ else if (Nkind (gnat_temp) == N_Identifier
+ || Nkind (gnat_temp) == N_Expanded_Name)
+ {
+ Entity_Id gnat_ex_id = Entity (gnat_temp);
+ tree gnu_expr;
- else if (TREE_CODE (gnu_prefix) != COMPONENT_REF
- && ! (attribute == Attr_Bit_Position
- && TREE_CODE (gnu_prefix) == FIELD_DECL))
- gigi_abort (310);
+ /* Exception may be a renaming. Recover original exception which is
+ the one elaborated and registered. */
+ if (Present (Renamed_Object (gnat_ex_id)))
+ gnat_ex_id = Renamed_Object (gnat_ex_id);
- get_inner_reference (gnu_prefix, &bitsize, &bitpos, &gnu_offset,
- &mode, &unsignedp, &volatilep, &alignment);
+ gnu_expr = gnat_to_gnu_entity (gnat_ex_id, NULL_TREE, 0);
+ this_choice
+ = build_binary_op
+ (EQ_EXPR, integer_type_node, TREE_VALUE (gnu_except_ptr_stack),
+ convert (TREE_TYPE (TREE_VALUE (gnu_except_ptr_stack)),
+ build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr)));
+
+ /* If this is the distinguished exception "Non_Ada_Error" (and we are
+ in VMS mode), also allow a non-Ada exception (a VMS condition) t
+ match. */
+ if (Is_Non_Ada_Error (Entity (gnat_temp)))
+ {
+ tree gnu_comp
+ = build_component_ref
+ (build_unary_op (INDIRECT_REF, NULL_TREE,
+ TREE_VALUE (gnu_except_ptr_stack)),
+ get_identifier ("lang"), NULL_TREE, false);
- if (TREE_CODE (gnu_prefix) == COMPONENT_REF)
- {
- gnu_field_bitpos
- = bit_position (TREE_OPERAND (gnu_prefix, 1));
- gnu_field_offset
- = byte_position (TREE_OPERAND (gnu_prefix, 1));
-
- for (gnu_inner = TREE_OPERAND (gnu_prefix, 0);
- TREE_CODE (gnu_inner) == COMPONENT_REF
- && DECL_INTERNAL_P (TREE_OPERAND (gnu_inner, 1));
- gnu_inner = TREE_OPERAND (gnu_inner, 0))
- {
- gnu_field_bitpos
- = size_binop (PLUS_EXPR, gnu_field_bitpos,
- bit_position (TREE_OPERAND (gnu_inner,
- 1)));
- gnu_field_offset
- = size_binop (PLUS_EXPR, gnu_field_offset,
- byte_position (TREE_OPERAND (gnu_inner,
- 1)));
- }
- }
- else if (TREE_CODE (gnu_prefix) == FIELD_DECL)
- {
- gnu_field_bitpos = bit_position (gnu_prefix);
- gnu_field_offset = byte_position (gnu_prefix);
- }
- else
- {
- gnu_field_bitpos = bitsize_zero_node;
- gnu_field_offset = size_zero_node;
- }
+ this_choice
+ = build_binary_op
+ (TRUTH_ORIF_EXPR, integer_type_node,
+ build_binary_op (EQ_EXPR, integer_type_node, gnu_comp,
+ build_int_cst (TREE_TYPE (gnu_comp), 'V')),
+ this_choice);
+ }
+ }
+ else
+ gcc_unreachable ();
- switch (attribute)
- {
- case Attr_Position:
- gnu_result = gnu_field_offset;
- break;
+ gnu_choice = build_binary_op (TRUTH_ORIF_EXPR, integer_type_node,
+ gnu_choice, this_choice);
+ }
+ return build3 (COND_EXPR, void_type_node, gnu_choice, gnu_body, NULL_TREE);
+}
+\f
+/* Subroutine of gnat_to_gnu to translate gnat_node, an N_Exception_Handler,
+ to a GCC tree, which is returned. This is the variant for ZCX. */
- case Attr_First_Bit:
- case Attr_Bit:
- gnu_result = size_int (bitpos % BITS_PER_UNIT);
- break;
+static tree
+Exception_Handler_to_gnu_zcx (Node_Id gnat_node)
+{
+ tree gnu_etypes_list = NULL_TREE;
+ tree gnu_expr;
+ tree gnu_etype;
+ tree gnu_current_exc_ptr;
+ tree gnu_incoming_exc_ptr;
+ Node_Id gnat_temp;
+ /* We build a TREE_LIST of nodes representing what exception types this
+ handler can catch, with special cases for others and all others cases.
- case Attr_Last_Bit:
- gnu_result = bitsize_int (bitpos % BITS_PER_UNIT);
- gnu_result
- = size_binop (PLUS_EXPR, gnu_result,
- TYPE_SIZE (TREE_TYPE (gnu_prefix)));
- gnu_result = size_binop (MINUS_EXPR, gnu_result,
- bitsize_one_node);
- break;
+ Each exception type is actually identified by a pointer to the exception
+ id, or to a dummy object for "others" and "all others".
- case Attr_Bit_Position:
- gnu_result = gnu_field_bitpos;
- break;
- }
+ Care should be taken to ensure that the control flow impact of "others"
+ and "all others" is known to GCC. lang_eh_type_covers is doing the trick
+ currently. */
+ for (gnat_temp = First (Exception_Choices (gnat_node));
+ gnat_temp; gnat_temp = Next (gnat_temp))
+ {
+ if (Nkind (gnat_temp) == N_Others_Choice)
+ {
+ tree gnu_expr
+ = All_Others (gnat_temp) ? all_others_decl : others_decl;
- /* If this has a PLACEHOLDER_EXPR, qualify it by the object
- we are handling. */
- if (TREE_CODE (gnu_result) != INTEGER_CST
- && contains_placeholder_p (gnu_result))
- gnu_result = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_result),
- gnu_result, gnu_prefix);
+ gnu_etype
+ = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr);
+ }
+ else if (Nkind (gnat_temp) == N_Identifier
+ || Nkind (gnat_temp) == N_Expanded_Name)
+ {
+ Entity_Id gnat_ex_id = Entity (gnat_temp);
- break;
- }
+ /* Exception may be a renaming. Recover original exception which is
+ the one elaborated and registered. */
+ if (Present (Renamed_Object (gnat_ex_id)))
+ gnat_ex_id = Renamed_Object (gnat_ex_id);
- case Attr_Min:
- case Attr_Max:
- gnu_lhs = gnat_to_gnu (First (Expressions (gnat_node)));
- gnu_rhs = gnat_to_gnu (Next (First (Expressions (gnat_node))));
+ gnu_expr = gnat_to_gnu_entity (gnat_ex_id, NULL_TREE, 0);
+ gnu_etype = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr);
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result = build_binary_op (attribute == Attr_Min
- ? MIN_EXPR : MAX_EXPR,
- gnu_result_type, gnu_lhs, gnu_rhs);
- break;
+ /* The Non_Ada_Error case for VMS exceptions is handled
+ by the personality routine. */
+ }
+ else
+ gcc_unreachable ();
+
+ /* The GCC interface expects NULL to be passed for catch all handlers, so
+ it would be quite tempting to set gnu_etypes_list to NULL if gnu_etype
+ is integer_zero_node. It would not work, however, because GCC's
+ notion of "catch all" is stronger than our notion of "others". Until
+ we correctly use the cleanup interface as well, doing that would
+ prevent the "all others" handlers from beeing seen, because nothing
+ can be caught beyond a catch all from GCC's point of view. */
+ gnu_etypes_list = tree_cons (NULL_TREE, gnu_etype, gnu_etypes_list);
+ }
- case Attr_Passed_By_Reference:
- gnu_result = size_int (default_pass_by_ref (gnu_type)
- || must_pass_by_ref (gnu_type));
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- break;
+ start_stmt_group ();
+ gnat_pushlevel ();
+
+ /* Expand a call to the begin_handler hook at the beginning of the handler,
+ and arrange for a call to the end_handler hook to occur on every possible
+ exit path.
+
+ The hooks expect a pointer to the low level occurrence. This is required
+ for our stack management scheme because a raise inside the handler pushes
+ a new occurrence on top of the stack, which means that this top does not
+ necessarily match the occurrence this handler was dealing with.
+
+ The EXC_PTR_EXPR object references the exception occurrence being
+ propagated. Upon handler entry, this is the exception for which the
+ handler is triggered. This might not be the case upon handler exit,
+ however, as we might have a new occurrence propagated by the handler's
+ body, and the end_handler hook called as a cleanup in this context.
+
+ We use a local variable to retrieve the incoming value at handler entry
+ time, and reuse it to feed the end_handler hook's argument at exit. */
+ gnu_current_exc_ptr = build0 (EXC_PTR_EXPR, ptr_type_node);
+ gnu_incoming_exc_ptr = create_var_decl (get_identifier ("EXPTR"), NULL_TREE,
+ ptr_type_node, gnu_current_exc_ptr,
+ false, false, false, false, NULL,
+ gnat_node);
+
+ add_stmt_with_node (build_call_1_expr (begin_handler_decl,
+ gnu_incoming_exc_ptr),
+ gnat_node);
+ add_cleanup (build_call_1_expr (end_handler_decl, gnu_incoming_exc_ptr));
+ add_stmt_list (Statements (gnat_node));
+ gnat_poplevel ();
+
+ return build2 (CATCH_EXPR, void_type_node, gnu_etypes_list,
+ end_stmt_group ());
+}
+\f
+/* Subroutine of gnat_to_gnu to generate code for an N_Compilation unit. */
- case Attr_Component_Size:
- if (TREE_CODE (gnu_prefix) == COMPONENT_REF
- && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))
- == RECORD_TYPE)
- && (TYPE_IS_PADDING_P
- (TREE_TYPE (TREE_OPERAND (gnu_prefix, 0)))))
- gnu_prefix = TREE_OPERAND (gnu_prefix, 0);
+static void
+Compilation_Unit_to_gnu (Node_Id gnat_node)
+{
+ /* Make the decl for the elaboration procedure. */
+ bool body_p = (Defining_Entity (Unit (gnat_node)),
+ Nkind (Unit (gnat_node)) == N_Package_Body
+ || Nkind (Unit (gnat_node)) == N_Subprogram_Body);
+ Entity_Id gnat_unit_entity = Defining_Entity (Unit (gnat_node));
+ tree gnu_elab_proc_decl
+ = create_subprog_decl
+ (create_concat_name (gnat_unit_entity,
+ body_p ? "elabb" : "elabs"),
+ NULL_TREE, void_ftype, NULL_TREE, false, true, false, NULL,
+ gnat_unit_entity);
+ struct elab_info *info;
+
+ push_stack (&gnu_elab_proc_stack, NULL_TREE, gnu_elab_proc_decl);
+
+ DECL_ELABORATION_PROC_P (gnu_elab_proc_decl) = 1;
+ allocate_struct_function (gnu_elab_proc_decl);
+ Sloc_to_locus (Sloc (gnat_unit_entity), &cfun->function_end_locus);
+ cfun = 0;
- gnu_prefix = maybe_implicit_deref (gnu_prefix);
- gnu_type = TREE_TYPE (gnu_prefix);
+ /* For a body, first process the spec if there is one. */
+ if (Nkind (Unit (gnat_node)) == N_Package_Body
+ || (Nkind (Unit (gnat_node)) == N_Subprogram_Body
+ && !Acts_As_Spec (gnat_node)))
+ add_stmt (gnat_to_gnu (Library_Unit (gnat_node)));
- if (TREE_CODE (gnu_type) == UNCONSTRAINED_ARRAY_TYPE)
- gnu_type
- = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_type))));
+ process_inlined_subprograms (gnat_node);
- while (TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE
- && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type)))
- gnu_type = TREE_TYPE (gnu_type);
+ if (type_annotate_only)
+ {
+ elaborate_all_entities (gnat_node);
- if (TREE_CODE (gnu_type) != ARRAY_TYPE)
- gigi_abort (330);
+ if (Nkind (Unit (gnat_node)) == N_Subprogram_Declaration
+ || Nkind (Unit (gnat_node)) == N_Generic_Package_Declaration
+ || Nkind (Unit (gnat_node)) == N_Generic_Subprogram_Declaration)
+ return;
+ }
- /* Note this size cannot be self-referential. */
- gnu_result = TYPE_SIZE (TREE_TYPE (gnu_type));
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- prefix_unused = 1;
- break;
+ process_decls (Declarations (Aux_Decls_Node (gnat_node)), Empty, Empty,
+ true, true);
+ add_stmt (gnat_to_gnu (Unit (gnat_node)));
+
+ /* Process any pragmas and actions following the unit. */
+ add_stmt_list (Pragmas_After (Aux_Decls_Node (gnat_node)));
+ add_stmt_list (Actions (Aux_Decls_Node (gnat_node)));
+
+ /* Save away what we've made so far and record this potential elaboration
+ procedure. */
+ info = (struct elab_info *) ggc_alloc (sizeof (struct elab_info));
+ set_current_block_context (gnu_elab_proc_decl);
+ gnat_poplevel ();
+ DECL_SAVED_TREE (gnu_elab_proc_decl) = end_stmt_group ();
+ info->next = elab_info_list;
+ info->elab_proc = gnu_elab_proc_decl;
+ info->gnat_node = gnat_node;
+ elab_info_list = info;
+
+ /* Generate elaboration code for this unit, if necessary, and say whether
+ we did or not. */
+ pop_stack (&gnu_elab_proc_stack);
+}
+\f
+/* This function is the driver of the GNAT to GCC tree transformation
+ process. It is the entry point of the tree transformer. GNAT_NODE is the
+ root of some GNAT tree. Return the root of the corresponding GCC tree.
+ If this is an expression, return the GCC equivalent of the expression. If
+ it is a statement, return the statement. In the case when called for a
+ statement, it may also add statements to the current statement group, in
+ which case anything it returns is to be interpreted as occuring after
+ anything `it already added. */
- case Attr_Null_Parameter:
- /* This is just a zero cast to the pointer type for
- our prefix and dereferenced. */
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result
- = build_unary_op (INDIRECT_REF, NULL_TREE,
- convert (build_pointer_type (gnu_result_type),
- integer_zero_node));
- TREE_PRIVATE (gnu_result) = 1;
- break;
+tree
+gnat_to_gnu (Node_Id gnat_node)
+{
+ bool went_into_elab_proc = false;
+ tree gnu_result = error_mark_node; /* Default to no value. */
+ tree gnu_result_type = void_type_node;
+ tree gnu_expr;
+ tree gnu_lhs, gnu_rhs;
+ Node_Id gnat_temp;
- case Attr_Mechanism_Code:
- {
- int code;
- Entity_Id gnat_obj = Entity (Prefix (gnat_node));
+ /* Save node number for error message and set location information. */
+ error_gnat_node = gnat_node;
+ Sloc_to_locus (Sloc (gnat_node), &input_location);
- prefix_unused = 1;
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- if (Present (Expressions (gnat_node)))
- {
- int i = UI_To_Int (Intval (First (Expressions (gnat_node))));
+ if (type_annotate_only
+ && IN (Nkind (gnat_node), N_Statement_Other_Than_Procedure_Call))
+ return alloc_stmt_list ();
- for (gnat_obj = First_Formal (gnat_obj); i > 1;
- i--, gnat_obj = Next_Formal (gnat_obj))
- ;
- }
+ /* If this node is a non-static subexpression and we are only
+ annotating types, make this into a NULL_EXPR. */
+ if (type_annotate_only
+ && IN (Nkind (gnat_node), N_Subexpr)
+ && Nkind (gnat_node) != N_Identifier
+ && !Compile_Time_Known_Value (gnat_node))
+ return build1 (NULL_EXPR, get_unpadded_type (Etype (gnat_node)),
+ build_call_raise (CE_Range_Check_Failed));
+
+ /* If this is a Statement and we are at top level, it must be part of
+ the elaboration procedure, so mark us as being in that procedure
+ and push our context. */
+ if (!current_function_decl
+ && ((IN (Nkind (gnat_node), N_Statement_Other_Than_Procedure_Call)
+ && Nkind (gnat_node) != N_Null_Statement)
+ || Nkind (gnat_node) == N_Procedure_Call_Statement
+ || Nkind (gnat_node) == N_Label
+ || Nkind (gnat_node) == N_Implicit_Label_Declaration
+ || Nkind (gnat_node) == N_Handled_Sequence_Of_Statements
+ || ((Nkind (gnat_node) == N_Raise_Constraint_Error
+ || Nkind (gnat_node) == N_Raise_Storage_Error
+ || Nkind (gnat_node) == N_Raise_Program_Error)
+ && (Ekind (Etype (gnat_node)) == E_Void))))
+ {
+ current_function_decl = TREE_VALUE (gnu_elab_proc_stack);
+ start_stmt_group ();
+ gnat_pushlevel ();
+ went_into_elab_proc = true;
+ }
- code = Mechanism (gnat_obj);
- if (code == Default)
- code = ((present_gnu_tree (gnat_obj)
- && (DECL_BY_REF_P (get_gnu_tree (gnat_obj))
- || (DECL_BY_COMPONENT_PTR_P
- (get_gnu_tree (gnat_obj)))))
- ? By_Reference : By_Copy);
- gnu_result = convert (gnu_result_type, size_int (- code));
- }
- break;
+ switch (Nkind (gnat_node))
+ {
+ /********************************/
+ /* Chapter 2: Lexical Elements: */
+ /********************************/
+
+ case N_Identifier:
+ case N_Expanded_Name:
+ case N_Operator_Symbol:
+ case N_Defining_Identifier:
+ gnu_result = Identifier_to_gnu (gnat_node, &gnu_result_type);
+ break;
- default:
- /* Say we have an unimplemented attribute. Then set the
- value to be returned to be a zero and hope that's something
- we can convert to the type of this attribute. */
+ case N_Integer_Literal:
+ {
+ tree gnu_type;
- post_error ("unimplemented attribute", gnat_node);
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result = integer_zero_node;
- break;
- }
+ /* Get the type of the result, looking inside any padding and
+ justified modular types. Then get the value in that type. */
+ gnu_type = gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+ if (TREE_CODE (gnu_type) == RECORD_TYPE
+ && TYPE_JUSTIFIED_MODULAR_P (gnu_type))
+ gnu_type = TREE_TYPE (TYPE_FIELDS (gnu_type));
- /* If this is an attribute where the prefix was unused,
- force a use of it if it has a side-effect. */
- if (prefix_unused && TREE_SIDE_EFFECTS (gnu_prefix))
- gnu_result = fold (build (COMPOUND_EXPR, TREE_TYPE (gnu_result),
- gnu_prefix, gnu_result));
+ gnu_result = UI_To_gnu (Intval (gnat_node), gnu_type);
+
+ /* If the result overflows (meaning it doesn't fit in its base type),
+ abort. We would like to check that the value is within the range
+ of the subtype, but that causes problems with subtypes whose usage
+ will raise Constraint_Error and with biased representation, so
+ we don't. */
+ gcc_assert (!TREE_CONSTANT_OVERFLOW (gnu_result));
}
break;
- case N_Reference:
- /* Like 'Access as far as we are concerned. */
- gnu_result = gnat_to_gnu (Prefix (gnat_node));
- gnu_result = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_result);
+ case N_Character_Literal:
+ /* If a Entity is present, it means that this was one of the
+ literals in a user-defined character type. In that case,
+ just return the value in the CONST_DECL. Otherwise, use the
+ character code. In that case, the base type should be an
+ INTEGER_TYPE, but we won't bother checking for that. */
gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ if (Present (Entity (gnat_node)))
+ gnu_result = DECL_INITIAL (get_gnu_tree (Entity (gnat_node)));
+ else
+ gnu_result
+ = force_fit_type
+ (build_int_cst
+ (gnu_result_type, UI_To_CC (Char_Literal_Value (gnat_node))),
+ false, false, false);
break;
- case N_Aggregate:
- case N_Extension_Aggregate:
- {
- tree gnu_aggr_type;
+ case N_Real_Literal:
+ /* If this is of a fixed-point type, the value we want is the
+ value of the corresponding integer. */
+ if (IN (Ekind (Underlying_Type (Etype (gnat_node))), Fixed_Point_Kind))
+ {
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result = UI_To_gnu (Corresponding_Integer_Value (gnat_node),
+ gnu_result_type);
+ gcc_assert (!TREE_CONSTANT_OVERFLOW (gnu_result));
+ }
- /* ??? It is wrong to evaluate the type now, but there doesn't
- seem to be any other practical way of doing it. */
+ /* We should never see a Vax_Float type literal, since the front end
+ is supposed to transform these using appropriate conversions */
+ else if (Vax_Float (Underlying_Type (Etype (gnat_node))))
+ gcc_unreachable ();
- gnu_aggr_type = gnu_result_type
- = get_unpadded_type (Etype (gnat_node));
+ else
+ {
+ Ureal ur_realval = Realval (gnat_node);
- if (TREE_CODE (gnu_result_type) == RECORD_TYPE
- && TYPE_CONTAINS_TEMPLATE_P (gnu_result_type))
- gnu_aggr_type
- = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_result_type)));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
- if (Null_Record_Present (gnat_node))
- gnu_result = build_constructor (gnu_aggr_type, NULL_TREE);
+ /* If the real value is zero, so is the result. Otherwise,
+ convert it to a machine number if it isn't already. That
+ forces BASE to 0 or 2 and simplifies the rest of our logic. */
+ if (UR_Is_Zero (ur_realval))
+ gnu_result = convert (gnu_result_type, integer_zero_node);
+ else
+ {
+ if (!Is_Machine_Number (gnat_node))
+ ur_realval
+ = Machine (Base_Type (Underlying_Type (Etype (gnat_node))),
+ ur_realval, Round_Even, gnat_node);
- else if (TREE_CODE (gnu_aggr_type) == RECORD_TYPE)
- gnu_result
- = assoc_to_constructor (First (Component_Associations (gnat_node)),
- gnu_aggr_type);
- else if (TREE_CODE (gnu_aggr_type) == UNION_TYPE)
- {
- /* The first element is the discrimant, which we ignore. The
- next is the field we're building. Convert the expression
- to the type of the field and then to the union type. */
- Node_Id gnat_assoc
- = Next (First (Component_Associations (gnat_node)));
- Entity_Id gnat_field = Entity (First (Choices (gnat_assoc)));
- tree gnu_field_type
- = TREE_TYPE (gnat_to_gnu_entity (gnat_field, NULL_TREE, 0));
+ gnu_result
+ = UI_To_gnu (Numerator (ur_realval), gnu_result_type);
- gnu_result = convert (gnu_field_type,
- gnat_to_gnu (Expression (gnat_assoc)));
- }
- else if (TREE_CODE (gnu_aggr_type) == ARRAY_TYPE)
- gnu_result = pos_to_constructor (First (Expressions (gnat_node)),
- gnu_aggr_type,
- Component_Type (Etype (gnat_node)));
- else if (TREE_CODE (gnu_aggr_type) == COMPLEX_TYPE)
- gnu_result
- = build_binary_op
- (COMPLEX_EXPR, gnu_aggr_type,
- gnat_to_gnu (Expression (First
- (Component_Associations (gnat_node)))),
- gnat_to_gnu (Expression
- (Next
- (First (Component_Associations (gnat_node))))));
- else
- gigi_abort (312);
+ /* If we have a base of zero, divide by the denominator.
+ Otherwise, the base must be 2 and we scale the value, which
+ we know can fit in the mantissa of the type (hence the use
+ of that type above). */
+ if (No (Rbase (ur_realval)))
+ gnu_result
+ = build_binary_op (RDIV_EXPR,
+ get_base_type (gnu_result_type),
+ gnu_result,
+ UI_To_gnu (Denominator (ur_realval),
+ gnu_result_type));
+ else
+ {
+ REAL_VALUE_TYPE tmp;
- gnu_result = convert (gnu_result_type, gnu_result);
- }
- break;
+ gcc_assert (Rbase (ur_realval) == 2);
+ real_ldexp (&tmp, &TREE_REAL_CST (gnu_result),
+ - UI_To_Int (Denominator (ur_realval)));
+ gnu_result = build_real (gnu_result_type, tmp);
+ }
+ }
+
+ /* Now see if we need to negate the result. Do it this way to
+ properly handle -0. */
+ if (UR_Is_Negative (Realval (gnat_node)))
+ gnu_result
+ = build_unary_op (NEGATE_EXPR, get_base_type (gnu_result_type),
+ gnu_result);
+ }
- case N_Null:
- gnu_result = null_pointer_node;
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
break;
- case N_Type_Conversion:
- case N_Qualified_Expression:
- /* Get the operand expression. */
- gnu_result = gnat_to_gnu (Expression (gnat_node));
+ case N_String_Literal:
gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ if (TYPE_PRECISION (TREE_TYPE (gnu_result_type)) == HOST_BITS_PER_CHAR)
+ {
+ String_Id gnat_string = Strval (gnat_node);
+ int length = String_Length (gnat_string);
+ char *string = (char *) alloca (length + 1);
+ int i;
- gnu_result
- = convert_with_check (Etype (gnat_node), gnu_result,
- Do_Overflow_Check (gnat_node),
- Do_Range_Check (Expression (gnat_node)),
- Nkind (gnat_node) == N_Type_Conversion
- && Float_Truncate (gnat_node));
- break;
+ /* Build the string with the characters in the literal. Note
+ that Ada strings are 1-origin. */
+ for (i = 0; i < length; i++)
+ string[i] = Get_String_Char (gnat_string, i + 1);
- case N_Unchecked_Type_Conversion:
- gnu_result = gnat_to_gnu (Expression (gnat_node));
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ /* Put a null at the end of the string in case it's in a context
+ where GCC will want to treat it as a C string. */
+ string[i] = 0;
- /* If the result is a pointer type, see if we are improperly
- converting to a stricter alignment. */
+ gnu_result = build_string (length, string);
- if (STRICT_ALIGNMENT && POINTER_TYPE_P (gnu_result_type)
- && IN (Ekind (Etype (gnat_node)), Access_Kind))
+ /* Strings in GCC don't normally have types, but we want
+ this to not be converted to the array type. */
+ TREE_TYPE (gnu_result) = gnu_result_type;
+ }
+ else
{
- unsigned int align = known_alignment (gnu_result);
- tree gnu_obj_type = TREE_TYPE (gnu_result_type);
- unsigned int oalign
- = TREE_CODE (gnu_obj_type) == FUNCTION_TYPE
- ? FUNCTION_BOUNDARY : TYPE_ALIGN (gnu_obj_type);
+ /* Build a list consisting of each character, then make
+ the aggregate. */
+ String_Id gnat_string = Strval (gnat_node);
+ int length = String_Length (gnat_string);
+ int i;
+ tree gnu_list = NULL_TREE;
+ tree gnu_idx = TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_result_type));
- if (align != 0 && align < oalign && ! TYPE_ALIGN_OK_P (gnu_obj_type))
- post_error_ne_tree_2
- ("?source alignment (^) < alignment of & (^)",
- gnat_node, Designated_Type (Etype (gnat_node)),
- size_int (align / BITS_PER_UNIT), oalign / BITS_PER_UNIT);
- }
+ for (i = 0; i < length; i++)
+ {
+ gnu_list
+ = tree_cons (gnu_idx,
+ build_int_cst (TREE_TYPE (gnu_result_type),
+ Get_String_Char (gnat_string,
+ i + 1)),
+ gnu_list);
+
+ gnu_idx = int_const_binop (PLUS_EXPR, gnu_idx, integer_one_node,
+ 0);
+ }
- gnu_result = unchecked_convert (gnu_result_type, gnu_result);
+ gnu_result
+ = gnat_build_constructor (gnu_result_type, nreverse (gnu_list));
+ }
+ break;
+
+ case N_Pragma:
+ gnu_result = Pragma_to_gnu (gnat_node);
+ break;
+
+ /**************************************/
+ /* Chapter 3: Declarations and Types: */
+ /**************************************/
+
+ case N_Subtype_Declaration:
+ case N_Full_Type_Declaration:
+ case N_Incomplete_Type_Declaration:
+ case N_Private_Type_Declaration:
+ case N_Private_Extension_Declaration:
+ case N_Task_Type_Declaration:
+ process_type (Defining_Entity (gnat_node));
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ case N_Object_Declaration:
+ case N_Exception_Declaration:
+ gnat_temp = Defining_Entity (gnat_node);
+ gnu_result = alloc_stmt_list ();
+
+ /* If we are just annotating types and this object has an unconstrained
+ or task type, don't elaborate it. */
+ if (type_annotate_only
+ && (((Is_Array_Type (Etype (gnat_temp))
+ || Is_Record_Type (Etype (gnat_temp)))
+ && !Is_Constrained (Etype (gnat_temp)))
+ || Is_Concurrent_Type (Etype (gnat_temp))))
+ break;
+
+ if (Present (Expression (gnat_node))
+ && !(Nkind (gnat_node) == N_Object_Declaration
+ && No_Initialization (gnat_node))
+ && (!type_annotate_only
+ || Compile_Time_Known_Value (Expression (gnat_node))))
+ {
+ gnu_expr = gnat_to_gnu (Expression (gnat_node));
+ if (Do_Range_Check (Expression (gnat_node)))
+ gnu_expr = emit_range_check (gnu_expr, Etype (gnat_temp));
+
+ /* If this object has its elaboration delayed, we must force
+ evaluation of GNU_EXPR right now and save it for when the object
+ is frozen. */
+ if (Present (Freeze_Node (gnat_temp)))
+ {
+ if ((Is_Public (gnat_temp) || global_bindings_p ())
+ && !TREE_CONSTANT (gnu_expr))
+ gnu_expr
+ = create_var_decl (create_concat_name (gnat_temp, "init"),
+ NULL_TREE, TREE_TYPE (gnu_expr),
+ gnu_expr, false, Is_Public (gnat_temp),
+ false, false, NULL, gnat_temp);
+ else
+ gnu_expr = maybe_variable (gnu_expr);
+
+ save_gnu_tree (gnat_node, gnu_expr, true);
+ }
+ }
+ else
+ gnu_expr = NULL_TREE;
+
+ if (type_annotate_only && gnu_expr && TREE_CODE (gnu_expr) == ERROR_MARK)
+ gnu_expr = NULL_TREE;
+
+ if (No (Freeze_Node (gnat_temp)))
+ gnat_to_gnu_entity (gnat_temp, gnu_expr, 1);
+ break;
+
+ case N_Object_Renaming_Declaration:
+ gnat_temp = Defining_Entity (gnat_node);
+
+ /* Don't do anything if this renaming is handled by the front end or if
+ we are just annotating types and this object has a composite or task
+ type, don't elaborate it. We return the result in case it has any
+ SAVE_EXPRs in it that need to be evaluated here. */
+ if (!Is_Renaming_Of_Object (gnat_temp)
+ && ! (type_annotate_only
+ && (Is_Array_Type (Etype (gnat_temp))
+ || Is_Record_Type (Etype (gnat_temp))
+ || Is_Concurrent_Type (Etype (gnat_temp)))))
+ gnu_result
+ = gnat_to_gnu_entity (gnat_temp,
+ gnat_to_gnu (Renamed_Object (gnat_temp)), 1);
+ else
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ case N_Implicit_Label_Declaration:
+ gnat_to_gnu_entity (Defining_Entity (gnat_node), NULL_TREE, 1);
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ case N_Exception_Renaming_Declaration:
+ case N_Number_Declaration:
+ case N_Package_Renaming_Declaration:
+ case N_Subprogram_Renaming_Declaration:
+ /* These are fully handled in the front end. */
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ /*************************************/
+ /* Chapter 4: Names and Expressions: */
+ /*************************************/
+
+ case N_Explicit_Dereference:
+ gnu_result = gnat_to_gnu (Prefix (gnat_node));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_result);
+ break;
+
+ case N_Indexed_Component:
+ {
+ tree gnu_array_object = gnat_to_gnu (Prefix (gnat_node));
+ tree gnu_type;
+ int ndim;
+ int i;
+ Node_Id *gnat_expr_array;
+
+ gnu_array_object = maybe_implicit_deref (gnu_array_object);
+ gnu_array_object = maybe_unconstrained_array (gnu_array_object);
+
+ /* If we got a padded type, remove it too. */
+ if (TREE_CODE (TREE_TYPE (gnu_array_object)) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (TREE_TYPE (gnu_array_object)))
+ gnu_array_object
+ = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_array_object))),
+ gnu_array_object);
+
+ gnu_result = gnu_array_object;
+
+ /* First compute the number of dimensions of the array, then
+ fill the expression array, the order depending on whether
+ this is a Convention_Fortran array or not. */
+ for (ndim = 1, gnu_type = TREE_TYPE (gnu_array_object);
+ TREE_CODE (TREE_TYPE (gnu_type)) == ARRAY_TYPE
+ && TYPE_MULTI_ARRAY_P (TREE_TYPE (gnu_type));
+ ndim++, gnu_type = TREE_TYPE (gnu_type))
+ ;
+
+ gnat_expr_array = (Node_Id *) alloca (ndim * sizeof (Node_Id));
+
+ if (TYPE_CONVENTION_FORTRAN_P (TREE_TYPE (gnu_array_object)))
+ for (i = ndim - 1, gnat_temp = First (Expressions (gnat_node));
+ i >= 0;
+ i--, gnat_temp = Next (gnat_temp))
+ gnat_expr_array[i] = gnat_temp;
+ else
+ for (i = 0, gnat_temp = First (Expressions (gnat_node));
+ i < ndim;
+ i++, gnat_temp = Next (gnat_temp))
+ gnat_expr_array[i] = gnat_temp;
+
+ for (i = 0, gnu_type = TREE_TYPE (gnu_array_object);
+ i < ndim; i++, gnu_type = TREE_TYPE (gnu_type))
+ {
+ gcc_assert (TREE_CODE (gnu_type) == ARRAY_TYPE);
+ gnat_temp = gnat_expr_array[i];
+ gnu_expr = gnat_to_gnu (gnat_temp);
+
+ if (Do_Range_Check (gnat_temp))
+ gnu_expr
+ = emit_index_check
+ (gnu_array_object, gnu_expr,
+ TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))),
+ TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))));
+
+ gnu_result = build_binary_op (ARRAY_REF, NULL_TREE,
+ gnu_result, gnu_expr);
+ }
+ }
+
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ break;
+
+ case N_Slice:
+ {
+ tree gnu_type;
+ Node_Id gnat_range_node = Discrete_Range (gnat_node);
+
+ gnu_result = gnat_to_gnu (Prefix (gnat_node));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+ /* Do any implicit dereferences of the prefix and do any needed
+ range check. */
+ gnu_result = maybe_implicit_deref (gnu_result);
+ gnu_result = maybe_unconstrained_array (gnu_result);
+ gnu_type = TREE_TYPE (gnu_result);
+ if (Do_Range_Check (gnat_range_node))
+ {
+ /* Get the bounds of the slice. */
+ tree gnu_index_type
+ = TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_result_type));
+ tree gnu_min_expr = TYPE_MIN_VALUE (gnu_index_type);
+ tree gnu_max_expr = TYPE_MAX_VALUE (gnu_index_type);
+ tree gnu_expr_l, gnu_expr_h, gnu_expr_type;
+
+ /* Check to see that the minimum slice value is in range */
+ gnu_expr_l
+ = emit_index_check
+ (gnu_result, gnu_min_expr,
+ TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))),
+ TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))));
+
+ /* Check to see that the maximum slice value is in range */
+ gnu_expr_h
+ = emit_index_check
+ (gnu_result, gnu_max_expr,
+ TYPE_MIN_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))),
+ TYPE_MAX_VALUE (TYPE_INDEX_TYPE (TYPE_DOMAIN (gnu_type))));
+
+ /* Derive a good type to convert everything too */
+ gnu_expr_type = get_base_type (TREE_TYPE (gnu_expr_l));
+
+ /* Build a compound expression that does the range checks */
+ gnu_expr
+ = build_binary_op (COMPOUND_EXPR, gnu_expr_type,
+ convert (gnu_expr_type, gnu_expr_h),
+ convert (gnu_expr_type, gnu_expr_l));
+
+ /* Build a conditional expression that returns the range checks
+ expression if the slice range is not null (max >= min) or
+ returns the min if the slice range is null */
+ gnu_expr
+ = fold (build3 (COND_EXPR, gnu_expr_type,
+ build_binary_op (GE_EXPR, gnu_expr_type,
+ convert (gnu_expr_type,
+ gnu_max_expr),
+ convert (gnu_expr_type,
+ gnu_min_expr)),
+ gnu_expr, gnu_min_expr));
+ }
+ else
+ gnu_expr = TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_result_type));
+
+ gnu_result = build_binary_op (ARRAY_RANGE_REF, gnu_result_type,
+ gnu_result, gnu_expr);
+ }
+ break;
+
+ case N_Selected_Component:
+ {
+ tree gnu_prefix = gnat_to_gnu (Prefix (gnat_node));
+ Entity_Id gnat_field = Entity (Selector_Name (gnat_node));
+ Entity_Id gnat_pref_type = Etype (Prefix (gnat_node));
+ tree gnu_field;
+
+ while (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind)
+ || IN (Ekind (gnat_pref_type), Access_Kind))
+ {
+ if (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind))
+ gnat_pref_type = Underlying_Type (gnat_pref_type);
+ else if (IN (Ekind (gnat_pref_type), Access_Kind))
+ gnat_pref_type = Designated_Type (gnat_pref_type);
+ }
+
+ gnu_prefix = maybe_implicit_deref (gnu_prefix);
+
+ /* For discriminant references in tagged types always substitute the
+ corresponding discriminant as the actual selected component. */
+
+ if (Is_Tagged_Type (gnat_pref_type))
+ while (Present (Corresponding_Discriminant (gnat_field)))
+ gnat_field = Corresponding_Discriminant (gnat_field);
+
+ /* For discriminant references of untagged types always substitute the
+ corresponding stored discriminant. */
+
+ else if (Present (Corresponding_Discriminant (gnat_field)))
+ gnat_field = Original_Record_Component (gnat_field);
+
+ /* Handle extracting the real or imaginary part of a complex.
+ The real part is the first field and the imaginary the last. */
+
+ if (TREE_CODE (TREE_TYPE (gnu_prefix)) == COMPLEX_TYPE)
+ gnu_result = build_unary_op (Present (Next_Entity (gnat_field))
+ ? REALPART_EXPR : IMAGPART_EXPR,
+ NULL_TREE, gnu_prefix);
+ else
+ {
+ gnu_field = gnat_to_gnu_field_decl (gnat_field);
+
+ /* If there are discriminants, the prefix might be
+ evaluated more than once, which is a problem if it has
+ side-effects. */
+ if (Has_Discriminants (Is_Access_Type (Etype (Prefix (gnat_node)))
+ ? Designated_Type (Etype
+ (Prefix (gnat_node)))
+ : Etype (Prefix (gnat_node))))
+ gnu_prefix = gnat_stabilize_reference (gnu_prefix, 0);
+
+ gnu_result
+ = build_component_ref (gnu_prefix, NULL_TREE, gnu_field,
+ (Nkind (Parent (gnat_node))
+ == N_Attribute_Reference));
+ }
+
+ gcc_assert (gnu_result);
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ }
+ break;
+
+ case N_Attribute_Reference:
+ {
+ /* The attribute designator (like an enumeration value). */
+ int attribute = Get_Attribute_Id (Attribute_Name (gnat_node));
+
+ /* The Elab_Spec and Elab_Body attributes are special in that
+ Prefix is a unit, not an object with a GCC equivalent. Similarly
+ for Elaborated, since that variable isn't otherwise known. */
+ if (attribute == Attr_Elab_Body || attribute == Attr_Elab_Spec)
+ return (create_subprog_decl
+ (create_concat_name (Entity (Prefix (gnat_node)),
+ attribute == Attr_Elab_Body
+ ? "elabb" : "elabs"),
+ NULL_TREE, void_ftype, NULL_TREE, false, true, true, NULL,
+ gnat_node));
+
+ gnu_result = Attribute_to_gnu (gnat_node, &gnu_result_type, attribute);
+ }
+ break;
+
+ case N_Reference:
+ /* Like 'Access as far as we are concerned. */
+ gnu_result = gnat_to_gnu (Prefix (gnat_node));
+ gnu_result = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_result);
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ break;
+
+ case N_Aggregate:
+ case N_Extension_Aggregate:
+ {
+ tree gnu_aggr_type;
+
+ /* ??? It is wrong to evaluate the type now, but there doesn't
+ seem to be any other practical way of doing it. */
+
+ gcc_assert (!Expansion_Delayed (gnat_node));
+
+ gnu_aggr_type = gnu_result_type
+ = get_unpadded_type (Etype (gnat_node));
+
+ if (TREE_CODE (gnu_result_type) == RECORD_TYPE
+ && TYPE_CONTAINS_TEMPLATE_P (gnu_result_type))
+ gnu_aggr_type
+ = TREE_TYPE (TREE_CHAIN (TYPE_FIELDS (gnu_result_type)));
+
+ if (Null_Record_Present (gnat_node))
+ gnu_result = gnat_build_constructor (gnu_aggr_type, NULL_TREE);
+
+ else if (TREE_CODE (gnu_aggr_type) == UNION_TYPE
+ && TYPE_UNCHECKED_UNION_P (gnu_aggr_type))
+ {
+ /* The first element is the discrimant, which we ignore. The
+ next is the field we're building. Convert the expression
+ to the type of the field and then to the union type. */
+ Node_Id gnat_assoc
+ = Next (First (Component_Associations (gnat_node)));
+ Entity_Id gnat_field = Entity (First (Choices (gnat_assoc)));
+ tree gnu_field_type
+ = TREE_TYPE (gnat_to_gnu_entity (gnat_field, NULL_TREE, 0));
+
+ gnu_result = convert (gnu_field_type,
+ gnat_to_gnu (Expression (gnat_assoc)));
+ }
+ else if (TREE_CODE (gnu_aggr_type) == RECORD_TYPE
+ || TREE_CODE (gnu_aggr_type) == UNION_TYPE)
+ gnu_result
+ = assoc_to_constructor (First (Component_Associations (gnat_node)),
+ gnu_aggr_type);
+ else if (TREE_CODE (gnu_aggr_type) == ARRAY_TYPE)
+ gnu_result = pos_to_constructor (First (Expressions (gnat_node)),
+ gnu_aggr_type,
+ Component_Type (Etype (gnat_node)));
+ else if (TREE_CODE (gnu_aggr_type) == COMPLEX_TYPE)
+ gnu_result
+ = build_binary_op
+ (COMPLEX_EXPR, gnu_aggr_type,
+ gnat_to_gnu (Expression (First
+ (Component_Associations (gnat_node)))),
+ gnat_to_gnu (Expression
+ (Next
+ (First (Component_Associations (gnat_node))))));
+ else
+ gcc_unreachable ();
+
+ gnu_result = convert (gnu_result_type, gnu_result);
+ }
+ break;
+
+ case N_Null:
+ gnu_result = null_pointer_node;
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ break;
+
+ case N_Type_Conversion:
+ case N_Qualified_Expression:
+ /* Get the operand expression. */
+ gnu_result = gnat_to_gnu (Expression (gnat_node));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+ gnu_result
+ = convert_with_check (Etype (gnat_node), gnu_result,
+ Do_Overflow_Check (gnat_node),
+ Do_Range_Check (Expression (gnat_node)),
+ Nkind (gnat_node) == N_Type_Conversion
+ && Float_Truncate (gnat_node));
+ break;
+
+ case N_Unchecked_Type_Conversion:
+ gnu_result = gnat_to_gnu (Expression (gnat_node));
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+
+ /* If the result is a pointer type, see if we are improperly
+ converting to a stricter alignment. */
+
+ if (STRICT_ALIGNMENT && POINTER_TYPE_P (gnu_result_type)
+ && IN (Ekind (Etype (gnat_node)), Access_Kind))
+ {
+ unsigned int align = known_alignment (gnu_result);
+ tree gnu_obj_type = TREE_TYPE (gnu_result_type);
+ unsigned int oalign = TYPE_ALIGN (gnu_obj_type);
+
+ if (align != 0 && align < oalign && !TYPE_ALIGN_OK (gnu_obj_type))
+ post_error_ne_tree_2
+ ("?source alignment (^) < alignment of & (^)",
+ gnat_node, Designated_Type (Etype (gnat_node)),
+ size_int (align / BITS_PER_UNIT), oalign / BITS_PER_UNIT);
+ }
+
+ gnu_result = unchecked_convert (gnu_result_type, gnu_result,
+ No_Truncation (gnat_node));
break;
case N_In:
gnu_high = TYPE_MAX_VALUE (gnu_range_type);
}
else
- gigi_abort (313);
+ gcc_unreachable ();
gnu_result_type = get_unpadded_type (Etype (gnat_node));
gnu_object, gnu_low);
else
{
- gnu_object = make_save_expr (gnu_object);
+ gnu_object = protect_multiple_eval (gnu_object);
gnu_result
= build_binary_op (TRUTH_ANDIF_EXPR, gnu_result_type,
build_binary_op (GE_EXPR, gnu_result_type,
gnu_result_type, gnu_lhs, gnu_rhs);
break;
- case N_And_Then: case N_Or_Else:
- {
- enum tree_code code = gnu_codes[Nkind (gnat_node)];
- tree gnu_rhs_side;
-
- /* The elaboration of the RHS may generate code. If so,
- we need to make sure it gets executed after the LHS. */
- gnu_lhs = gnat_to_gnu (Left_Opnd (gnat_node));
- clear_last_expr ();
- gnu_rhs_side = expand_start_stmt_expr ();
- gnu_rhs = gnat_to_gnu (Right_Opnd (gnat_node));
- expand_end_stmt_expr (gnu_rhs_side);
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
-
- if (RTL_EXPR_SEQUENCE (gnu_rhs_side) != 0)
- gnu_rhs = build (COMPOUND_EXPR, gnu_result_type, gnu_rhs_side,
- gnu_rhs);
-
- gnu_result = build_binary_op (code, gnu_result_type, gnu_lhs, gnu_rhs);
- }
- break;
-
case N_Op_Or: case N_Op_And: case N_Op_Xor:
/* These can either be operations on booleans or on modular types.
Fall through for boolean types since that's the way GNU_CODES is
case N_Op_Shift_Left:
case N_Op_Shift_Right:
case N_Op_Shift_Right_Arithmetic:
+ case N_And_Then: case N_Or_Else:
{
enum tree_code code = gnu_codes[Nkind (gnat_node)];
tree gnu_type;
/* If this is a comparison operator, convert any references to
an unconstrained array value into a reference to the
actual array. */
- if (TREE_CODE_CLASS (code) == '<')
+ if (TREE_CODE_CLASS (code) == tcc_comparison)
{
gnu_lhs = maybe_unconstrained_array (gnu_lhs);
gnu_rhs = maybe_unconstrained_array (gnu_rhs);
}
+ /* If the result type is a private type, its full view may be a
+ numeric subtype. The representation we need is that of its base
+ type, given that it is the result of an arithmetic operation. */
+ else if (Is_Private_Type (Etype (gnat_node)))
+ gnu_type = gnu_result_type
+ = get_unpadded_type (Base_Type (Full_View (Etype (gnat_node))));
+
/* If this is a shift whose count is not guaranteed to be correct,
we need to adjust the shift count. */
if (IN (Nkind (gnat_node), N_Op_Shift)
- && ! Shift_Count_OK (gnat_node))
+ && !Shift_Count_OK (gnat_node))
{
tree gnu_count_type = get_base_type (TREE_TYPE (gnu_rhs));
tree gnu_max_shift
/* For right shifts, the type says what kind of shift to do,
so we may need to choose a different type. */
if (Nkind (gnat_node) == N_Op_Shift_Right
- && ! TREE_UNSIGNED (gnu_type))
- gnu_type = unsigned_type (gnu_type);
+ && !TYPE_UNSIGNED (gnu_type))
+ gnu_type = gnat_unsigned_type (gnu_type);
else if (Nkind (gnat_node) == N_Op_Shift_Right_Arithmetic
- && TREE_UNSIGNED (gnu_type))
- gnu_type = signed_type (gnu_type);
+ && TYPE_UNSIGNED (gnu_type))
+ gnu_type = gnat_signed_type (gnu_type);
if (gnu_type != gnu_result_type)
{
above in this case. */
if ((Nkind (gnat_node) == N_Op_Shift_Left
|| Nkind (gnat_node) == N_Op_Shift_Right)
- && ! Shift_Count_OK (gnat_node))
+ && !Shift_Count_OK (gnat_node))
gnu_result
= build_cond_expr
- (gnu_type,
+ (gnu_type,
build_binary_op (GE_EXPR, integer_type_node,
gnu_rhs,
convert (TREE_TYPE (gnu_rhs),
gnu_result_type = get_unpadded_type (Etype (gnat_node));
gnu_result = build_cond_expr (gnu_result_type,
- truthvalue_conversion (gnu_cond),
+ gnat_truthvalue_conversion (gnu_cond),
gnu_true, gnu_false);
}
break;
case N_Op_Minus: case N_Op_Abs:
gnu_expr = gnat_to_gnu (Right_Opnd (gnat_node));
- if (Ekind (Etype (gnat_node)) != E_Private_Type)
+ if (Ekind (Etype (gnat_node)) != E_Private_Type)
gnu_result_type = get_unpadded_type (Etype (gnat_node));
else
gnu_result_type = get_unpadded_type (Base_Type
}
}
else
- gigi_abort (315);
+ gcc_unreachable ();
gnu_result_type = get_unpadded_type (Etype (gnat_node));
return build_allocator (gnu_type, gnu_init, gnu_result_type,
Procedure_To_Call (gnat_node),
- Storage_Pool (gnat_node));
+ Storage_Pool (gnat_node), gnat_node);
}
break;
/***************************/
case N_Label:
- if (! type_annotate_only)
- {
- tree gnu_label = gnat_to_gnu (Identifier (gnat_node));
- Node_Id gnat_parent = Parent (gnat_node);
-
- expand_label (gnu_label);
-
- /* If this is the first label of an exception handler, we must
- mark that any CALL_INSN can jump to it. */
- if (Present (gnat_parent)
- && Nkind (gnat_parent) == N_Exception_Handler
- && First (Statements (gnat_parent)) == gnat_node)
- nonlocal_goto_handler_labels
- = gen_rtx_EXPR_LIST (VOIDmode, label_rtx (gnu_label),
- nonlocal_goto_handler_labels);
- }
+ gnu_result = build1 (LABEL_EXPR, void_type_node,
+ gnat_to_gnu (Identifier (gnat_node)));
break;
case N_Null_Statement:
+ gnu_result = alloc_stmt_list ();
break;
case N_Assignment_Statement:
- if (type_annotate_only)
- break;
-
/* Get the LHS and RHS of the statement and convert any reference to an
- unconstrained array into a reference to the underlying array. */
+ unconstrained array into a reference to the underlying array.
+ If we are not to do range checking and the RHS is an N_Function_Call,
+ pass the LHS to the call function. */
gnu_lhs = maybe_unconstrained_array (gnat_to_gnu (Name (gnat_node)));
- gnu_rhs
- = maybe_unconstrained_array (gnat_to_gnu (Expression (gnat_node)));
- /* If range check is needed, emit code to generate it */
- if (Do_Range_Check (Expression (gnat_node)))
- gnu_rhs = emit_range_check (gnu_rhs, Etype (Name (gnat_node)));
-
- set_lineno (gnat_node, 1);
-
- /* If either side's type has a size that overflows, convert this
- into raise of Storage_Error: execution shouldn't have gotten
- here anyway. */
- if ((TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_lhs))) == INTEGER_CST
+ /* If the type has a size that overflows, convert this into raise of
+ Storage_Error: execution shouldn't have gotten here anyway. */
+ if (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_lhs))) == INTEGER_CST
&& TREE_OVERFLOW (TYPE_SIZE (TREE_TYPE (gnu_lhs))))
- || (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_rhs))) == INTEGER_CST
- && TREE_OVERFLOW (TYPE_SIZE (TREE_TYPE (gnu_rhs)))))
- expand_expr_stmt (build_call_raise (raise_storage_error_decl));
+ gnu_result = build_call_raise (SE_Object_Too_Large);
+ else if (Nkind (Expression (gnat_node)) == N_Function_Call
+ && !Do_Range_Check (Expression (gnat_node)))
+ gnu_result = call_to_gnu (Expression (gnat_node),
+ &gnu_result_type, gnu_lhs);
else
- expand_expr_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE,
- gnu_lhs, gnu_rhs));
- break;
-
- case N_If_Statement:
- /* Start an IF statement giving the condition. */
- gnu_expr = gnat_to_gnu (Condition (gnat_node));
- set_lineno (gnat_node, 1);
- expand_start_cond (gnu_expr, 0);
+ {
+ gnu_rhs
+ = maybe_unconstrained_array (gnat_to_gnu (Expression (gnat_node)));
- /* Generate code for the statements to be executed if the condition
- is true. */
+ /* If range check is needed, emit code to generate it */
+ if (Do_Range_Check (Expression (gnat_node)))
+ gnu_rhs = emit_range_check (gnu_rhs, Etype (Name (gnat_node)));
- for (gnat_temp = First (Then_Statements (gnat_node));
- Present (gnat_temp);
- gnat_temp = Next (gnat_temp))
- gnat_to_code (gnat_temp);
+ gnu_result
+ = build_binary_op (MODIFY_EXPR, NULL_TREE, gnu_lhs, gnu_rhs);
+ }
+ break;
- /* Generate each of the "else if" parts. */
- if (Present (Elsif_Parts (gnat_node)))
- {
+ case N_If_Statement:
+ {
+ tree *gnu_else_ptr; /* Point to put next "else if" or "else". */
+
+ /* Make the outer COND_EXPR. Avoid non-determinism. */
+ gnu_result = build3 (COND_EXPR, void_type_node,
+ gnat_to_gnu (Condition (gnat_node)),
+ NULL_TREE, NULL_TREE);
+ COND_EXPR_THEN (gnu_result)
+ = build_stmt_group (Then_Statements (gnat_node), false);
+ TREE_SIDE_EFFECTS (gnu_result) = 1;
+ gnu_else_ptr = &COND_EXPR_ELSE (gnu_result);
+
+ /* Now make a COND_EXPR for each of the "else if" parts. Put each
+ into the previous "else" part and point to where to put any
+ outer "else". Also avoid non-determinism. */
+ if (Present (Elsif_Parts (gnat_node)))
for (gnat_temp = First (Elsif_Parts (gnat_node));
- Present (gnat_temp);
- gnat_temp = Next (gnat_temp))
+ Present (gnat_temp); gnat_temp = Next (gnat_temp))
{
- Node_Id gnat_statement;
-
- expand_start_else ();
-
- /* Set up the line numbers for each condition we test. */
- set_lineno (Condition (gnat_temp), 1);
- expand_elseif (gnat_to_gnu (Condition (gnat_temp)));
-
- for (gnat_statement = First (Then_Statements (gnat_temp));
- Present (gnat_statement);
- gnat_statement = Next (gnat_statement))
- gnat_to_code (gnat_statement);
+ gnu_expr = build3 (COND_EXPR, void_type_node,
+ gnat_to_gnu (Condition (gnat_temp)),
+ NULL_TREE, NULL_TREE);
+ COND_EXPR_THEN (gnu_expr)
+ = build_stmt_group (Then_Statements (gnat_temp), false);
+ TREE_SIDE_EFFECTS (gnu_expr) = 1;
+ annotate_with_node (gnu_expr, gnat_temp);
+ *gnu_else_ptr = gnu_expr;
+ gnu_else_ptr = &COND_EXPR_ELSE (gnu_expr);
}
- }
-
- /* Finally, handle any statements in the "else" part. */
- if (Present (Else_Statements (gnat_node)))
- {
- expand_start_else ();
-
- for (gnat_temp = First (Else_Statements (gnat_node));
- Present (gnat_temp);
- gnat_temp = Next (gnat_temp))
- gnat_to_code (gnat_temp);
- }
- expand_end_cond ();
+ *gnu_else_ptr = build_stmt_group (Else_Statements (gnat_node), false);
+ }
break;
case N_Case_Statement:
- {
- Node_Id gnat_when;
- Node_Id gnat_choice;
- tree gnu_label;
- Node_Id gnat_statement;
-
- gnu_expr = gnat_to_gnu (Expression (gnat_node));
- gnu_expr = convert (get_base_type (TREE_TYPE (gnu_expr)), gnu_expr);
-
- set_lineno (gnat_node, 1);
- expand_start_case (1, gnu_expr, TREE_TYPE (gnu_expr), "case");
-
- for (gnat_when = First_Non_Pragma (Alternatives (gnat_node));
- Present (gnat_when);
- gnat_when = Next_Non_Pragma (gnat_when))
- {
- /* First compile all the different case choices for the current
- WHEN alternative. */
-
- for (gnat_choice = First (Discrete_Choices (gnat_when));
- Present (gnat_choice); gnat_choice = Next (gnat_choice))
- {
- int error_code;
-
- gnu_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
-
- set_lineno (gnat_choice, 1);
- switch (Nkind (gnat_choice))
- {
- case N_Range:
- /* Abort on all errors except range empty, which
- means we ignore this alternative. */
- error_code
- = pushcase_range (gnat_to_gnu (Low_Bound (gnat_choice)),
- gnat_to_gnu (High_Bound (gnat_choice)),
- convert, gnu_label, 0);
-
- if (error_code != 0 && error_code != 4)
- gigi_abort (332);
- break;
-
- case N_Subtype_Indication:
- error_code
- = pushcase_range
- (gnat_to_gnu (Low_Bound (Range_Expression
- (Constraint (gnat_choice)))),
- gnat_to_gnu (High_Bound (Range_Expression
- (Constraint (gnat_choice)))),
- convert, gnu_label, 0);
-
- if (error_code != 0 && error_code != 4)
- gigi_abort (332);
- break;
-
- case N_Identifier:
- case N_Expanded_Name:
- /* This represents either a subtype range or a static value
- of some kind; Ekind says which. If a static value,
- fall through to the next case. */
- if (IN (Ekind (Entity (gnat_choice)), Type_Kind))
- {
- tree type = get_unpadded_type (Entity (gnat_choice));
-
- error_code
- = pushcase_range (fold (TYPE_MIN_VALUE (type)),
- fold (TYPE_MAX_VALUE (type)),
- convert, gnu_label, 0);
-
- if (error_code != 0 && error_code != 4)
- gigi_abort (332);
- break;
- }
- /* ... fall through ... */
- case N_Character_Literal:
- case N_Integer_Literal:
- if (pushcase (gnat_to_gnu (gnat_choice), convert,
- gnu_label, 0))
- gigi_abort (332);
- break;
-
- case N_Others_Choice:
- if (pushcase (NULL_TREE, convert, gnu_label, 0))
- gigi_abort (332);
- break;
-
- default:
- gigi_abort (316);
- }
- }
-
- /* After compiling the choices attached to the WHEN compile the
- body of statements that have to be executed, should the
- "WHEN ... =>" be taken. */
- for (gnat_statement = First (Statements (gnat_when));
- Present (gnat_statement);
- gnat_statement = Next (gnat_statement))
- gnat_to_code (gnat_statement);
-
- /* Communicate to GCC that we are done with the current WHEN,
- i.e. insert a "break" statement. */
- expand_exit_something ();
- }
-
- expand_end_case (gnu_expr);
- }
+ gnu_result = Case_Statement_to_gnu (gnat_node);
break;
case N_Loop_Statement:
- {
- /* The loop variable in GCC form, if any. */
- tree gnu_loop_var = NULL_TREE;
- /* PREINCREMENT_EXPR or PREDECREMENT_EXPR. */
- enum tree_code gnu_update = ERROR_MARK;
- /* Used if this is a named loop for so EXIT can work. */
- struct nesting *loop_id;
- /* Condition to continue loop tested at top of loop. */
- tree gnu_top_condition = integer_one_node;
- /* Similar, but tested at bottom of loop. */
- tree gnu_bottom_condition = integer_one_node;
- Node_Id gnat_statement;
- Node_Id gnat_iter_scheme = Iteration_Scheme (gnat_node);
- Node_Id gnat_top_condition = Empty;
- int enclosing_if_p = 0;
-
- /* Set the condition that under which the loop should continue.
- For "LOOP .... END LOOP;" the condition is always true. */
- if (No (gnat_iter_scheme))
- ;
- /* The case "WHILE condition LOOP ..... END LOOP;" */
- else if (Present (Condition (gnat_iter_scheme)))
- gnat_top_condition = Condition (gnat_iter_scheme);
- else
- {
- /* We have an iteration scheme. */
- Node_Id gnat_loop_spec
- = Loop_Parameter_Specification (gnat_iter_scheme);
- Entity_Id gnat_loop_var = Defining_Entity (gnat_loop_spec);
- Entity_Id gnat_type = Etype (gnat_loop_var);
- tree gnu_type = get_unpadded_type (gnat_type);
- tree gnu_low = TYPE_MIN_VALUE (gnu_type);
- tree gnu_high = TYPE_MAX_VALUE (gnu_type);
- int reversep = Reverse_Present (gnat_loop_spec);
- tree gnu_first = reversep ? gnu_high : gnu_low;
- tree gnu_last = reversep ? gnu_low : gnu_high;
- enum tree_code end_code = reversep ? GE_EXPR : LE_EXPR;
- tree gnu_base_type = get_base_type (gnu_type);
- tree gnu_limit
- = (reversep ? TYPE_MIN_VALUE (gnu_base_type)
- : TYPE_MAX_VALUE (gnu_base_type));
-
- /* We know the loop variable will not overflow if GNU_LAST is
- a constant and is not equal to GNU_LIMIT. If it might
- overflow, we have to move the limit test to the end of
- the loop. In that case, we have to test for an
- empty loop outside the loop. */
- if (TREE_CODE (gnu_last) != INTEGER_CST
- || TREE_CODE (gnu_limit) != INTEGER_CST
- || tree_int_cst_equal (gnu_last, gnu_limit))
- {
- gnu_expr = build_binary_op (LE_EXPR, integer_type_node,
- gnu_low, gnu_high);
- set_lineno (gnat_loop_spec, 1);
- expand_start_cond (gnu_expr, 0);
- enclosing_if_p = 1;
- }
-
- /* Open a new nesting level that will surround the loop to declare
- the loop index variable. */
- pushlevel (0);
- expand_start_bindings (0);
-
- /* Declare the loop index and set it to its initial value. */
- gnu_loop_var = gnat_to_gnu_entity (gnat_loop_var, gnu_first, 1);
- if (DECL_BY_REF_P (gnu_loop_var))
- gnu_loop_var = build_unary_op (INDIRECT_REF, NULL_TREE,
- gnu_loop_var);
-
- /* The loop variable might be a padded type, so use `convert' to
- get a reference to the inner variable if so. */
- gnu_loop_var = convert (get_base_type (gnu_type), gnu_loop_var);
-
- /* Set either the top or bottom exit condition as
- appropriate depending on whether we know an overflow
- cannot occur or not. */
- if (enclosing_if_p)
- gnu_bottom_condition
- = build_binary_op (NE_EXPR, integer_type_node,
- gnu_loop_var, gnu_last);
- else
- gnu_top_condition
- = build_binary_op (end_code, integer_type_node,
- gnu_loop_var, gnu_last);
-
- gnu_update = reversep ? PREDECREMENT_EXPR : PREINCREMENT_EXPR;
- }
-
- set_lineno (gnat_node, 1);
- if (gnu_loop_var)
- loop_id = expand_start_loop_continue_elsewhere (1);
- else
- loop_id = expand_start_loop (1);
-
- /* If the loop was named, have the name point to this loop. In this
- case, the association is not a ..._DECL node; in fact, it isn't
- a GCC tree node at all. Since this name is referenced inside
- the loop, do it before we process the statements of the loop. */
- if (Present (Identifier (gnat_node)))
- {
- tree gnu_loop_id = make_node (GNAT_LOOP_ID);
-
- TREE_LOOP_ID (gnu_loop_id) = (rtx) loop_id;
- save_gnu_tree (Entity (Identifier (gnat_node)), gnu_loop_id, 1);
- }
-
- set_lineno (gnat_node, 1);
-
- /* We must evaluate the condition after we've entered the
- loop so that any expression actions get done in the right
- place. */
- if (Present (gnat_top_condition))
- gnu_top_condition = gnat_to_gnu (gnat_top_condition);
-
- expand_exit_loop_if_false (0, gnu_top_condition);
-
- /* Make the loop body into its own block, so any allocated
- storage will be released every iteration. This is needed
- for stack allocation. */
-
- pushlevel (0);
- gnu_block_stack
- = tree_cons (gnu_bottom_condition, NULL_TREE, gnu_block_stack);
- expand_start_bindings (0);
-
- for (gnat_statement = First (Statements (gnat_node));
- Present (gnat_statement);
- gnat_statement = Next (gnat_statement))
- gnat_to_code (gnat_statement);
-
- expand_end_bindings (getdecls (), kept_level_p (), 0);
- poplevel (kept_level_p (), 1, 0);
- gnu_block_stack = TREE_CHAIN (gnu_block_stack);
-
- set_lineno (gnat_node, 1);
- expand_exit_loop_if_false (0, gnu_bottom_condition);
-
- if (gnu_loop_var)
- {
- expand_loop_continue_here ();
- gnu_expr = build_binary_op (gnu_update, TREE_TYPE (gnu_loop_var),
- gnu_loop_var,
- convert (TREE_TYPE (gnu_loop_var),
- integer_one_node));
- set_lineno (gnat_iter_scheme, 1);
- expand_expr_stmt (gnu_expr);
- }
-
- set_lineno (gnat_node, 1);
- expand_end_loop ();
-
- if (gnu_loop_var)
- {
- /* Close the nesting level that sourround the loop that was used to
- declare the loop index variable. */
- set_lineno (gnat_node, 1);
- expand_end_bindings (getdecls (), 1, 0);
- poplevel (1, 1, 0);
- }
-
- if (enclosing_if_p)
- {
- set_lineno (gnat_node, 1);
- expand_end_cond ();
- }
- }
+ gnu_result = Loop_Statement_to_gnu (gnat_node);
break;
case N_Block_Statement:
- pushlevel (0);
- gnu_block_stack = tree_cons (NULL_TREE, NULL_TREE, gnu_block_stack);
- expand_start_bindings (0);
- process_decls (Declarations (gnat_node), Empty, Empty, 1, 1);
- gnat_to_code (Handled_Statement_Sequence (gnat_node));
- expand_end_bindings (getdecls (), kept_level_p (), 0);
- poplevel (kept_level_p (), 1, 0);
- gnu_block_stack = TREE_CHAIN (gnu_block_stack);
+ start_stmt_group ();
+ gnat_pushlevel ();
+ process_decls (Declarations (gnat_node), Empty, Empty, true, true);
+ add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node)));
+ gnat_poplevel ();
+ gnu_result = end_stmt_group ();
+
if (Present (Identifier (gnat_node)))
mark_out_of_scope (Entity (Identifier (gnat_node)));
break;
case N_Exit_Statement:
- {
- /* Which loop to exit, NULL if the current loop. */
- struct nesting *loop_id = 0;
- /* The GCC version of the optional GNAT condition node attached to the
- exit statement. Exit the loop if this is false. */
- tree gnu_cond = integer_zero_node;
-
- if (Present (Name (gnat_node)))
- loop_id
- = (struct nesting *)
- TREE_LOOP_ID (get_gnu_tree (Entity (Name (gnat_node))));
-
- if (Present (Condition (gnat_node)))
- gnu_cond
- = invert_truthvalue
- (truthvalue_conversion (gnat_to_gnu (Condition (gnat_node))));
-
- set_lineno (gnat_node, 1);
- expand_exit_loop_if_false (loop_id, gnu_cond);
- }
+ gnu_result
+ = build2 (EXIT_STMT, void_type_node,
+ (Present (Condition (gnat_node))
+ ? gnat_to_gnu (Condition (gnat_node)) : NULL_TREE),
+ (Present (Name (gnat_node))
+ ? get_gnu_tree (Entity (Name (gnat_node)))
+ : TREE_VALUE (gnu_loop_label_stack)));
break;
case N_Return_Statement:
- if (type_annotate_only)
- break;
-
{
/* The gnu function type of the subprogram currently processed. */
tree gnu_subprog_type = TREE_TYPE (current_function_decl);
/* The return value from the subprogram. */
- tree gnu_ret_val = 0;
+ tree gnu_ret_val = NULL_TREE;
+ /* The place to put the return value. */
+ tree gnu_lhs;
+ /* Avoid passing error_mark_node to RETURN_EXPR. */
+ gnu_result = NULL_TREE;
/* If we are dealing with a "return;" from an Ada procedure with
parameters passed by copy in copy out, we need to return a record
But if we have a return label defined, convert this into
a branch to that label. */
- if (TREE_VALUE (gnu_return_label_stack) != 0)
- expand_goto (TREE_VALUE (gnu_return_label_stack));
+ if (TREE_VALUE (gnu_return_label_stack))
+ {
+ gnu_result = build1 (GOTO_EXPR, void_type_node,
+ TREE_VALUE (gnu_return_label_stack));
+ break;
+ }
- else if (TYPE_CI_CO_LIST (gnu_subprog_type) != NULL_TREE)
+ else if (TYPE_CI_CO_LIST (gnu_subprog_type))
{
+ gnu_lhs = DECL_RESULT (current_function_decl);
if (list_length (TYPE_CI_CO_LIST (gnu_subprog_type)) == 1)
gnu_ret_val = TREE_VALUE (TYPE_CI_CO_LIST (gnu_subprog_type));
else
gnu_ret_val
- = build_constructor (TREE_TYPE (gnu_subprog_type),
- TYPE_CI_CO_LIST (gnu_subprog_type));
+ = gnat_build_constructor (TREE_TYPE (gnu_subprog_type),
+ TYPE_CI_CO_LIST (gnu_subprog_type));
}
/* If the Ada subprogram is a function, we just need to return the
else if (Present (Expression (gnat_node)))
{
- gnu_ret_val = gnat_to_gnu (Expression (gnat_node));
-
- /* Do not remove the padding from GNU_RET_VAL if the inner
- type is self-referential since we want to allocate the fixed
- size in that case. */
- if (TREE_CODE (gnu_ret_val) == COMPONENT_REF
- && (TYPE_IS_PADDING_P
- (TREE_TYPE (TREE_OPERAND (gnu_ret_val, 0))))
- && contains_placeholder_p
- (TYPE_SIZE (TREE_TYPE (gnu_ret_val))))
- gnu_ret_val = TREE_OPERAND (gnu_ret_val, 0);
-
- if (TYPE_RETURNS_BY_REF_P (gnu_subprog_type)
- || By_Ref (gnat_node))
- gnu_ret_val = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_ret_val);
-
- else if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type))
+ /* If the current function returns by target pointer and we
+ are doing a call, pass that target to the call. */
+ if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type)
+ && Nkind (Expression (gnat_node)) == N_Function_Call)
{
- gnu_ret_val = maybe_unconstrained_array (gnu_ret_val);
-
- /* We have two cases: either the function returns with
- depressed stack or not. If not, we allocate on the
- secondary stack. If so, we allocate in the stack frame.
- if no copy is needed, the front end will set By_Ref,
- which we handle in the case above. */
- if (TYPE_RETURNS_STACK_DEPRESSED (gnu_subprog_type))
- gnu_ret_val
- = build_allocator (TREE_TYPE (gnu_ret_val), gnu_ret_val,
- TREE_TYPE (gnu_subprog_type), 0, -1);
+ gnu_lhs
+ = build_unary_op (INDIRECT_REF, NULL_TREE,
+ DECL_ARGUMENTS (current_function_decl));
+ gnu_result = call_to_gnu (Expression (gnat_node),
+ &gnu_result_type, gnu_lhs);
+ }
+ else
+ {
+ gnu_ret_val = gnat_to_gnu (Expression (gnat_node));
+
+ if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type))
+ /* The original return type was unconstrained so dereference
+ the TARGET pointer in the actual return value's type. */
+ gnu_lhs
+ = build_unary_op (INDIRECT_REF, TREE_TYPE (gnu_ret_val),
+ DECL_ARGUMENTS (current_function_decl));
else
+ gnu_lhs = DECL_RESULT (current_function_decl);
+
+ /* Do not remove the padding from GNU_RET_VAL if the inner
+ type is self-referential since we want to allocate the fixed
+ size in that case. */
+ if (TREE_CODE (gnu_ret_val) == COMPONENT_REF
+ && (TREE_CODE (TREE_TYPE (TREE_OPERAND (gnu_ret_val, 0)))
+ == RECORD_TYPE)
+ && (TYPE_IS_PADDING_P
+ (TREE_TYPE (TREE_OPERAND (gnu_ret_val, 0))))
+ && (CONTAINS_PLACEHOLDER_P
+ (TYPE_SIZE (TREE_TYPE (gnu_ret_val)))))
+ gnu_ret_val = TREE_OPERAND (gnu_ret_val, 0);
+
+ if (TYPE_RETURNS_BY_REF_P (gnu_subprog_type)
+ || By_Ref (gnat_node))
gnu_ret_val
- = build_allocator (TREE_TYPE (gnu_ret_val), gnu_ret_val,
- TREE_TYPE (gnu_subprog_type),
- Procedure_To_Call (gnat_node),
- Storage_Pool (gnat_node));
+ = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_ret_val);
+
+ else if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type))
+ {
+ gnu_ret_val = maybe_unconstrained_array (gnu_ret_val);
+
+ /* We have two cases: either the function returns with
+ depressed stack or not. If not, we allocate on the
+ secondary stack. If so, we allocate in the stack frame.
+ if no copy is needed, the front end will set By_Ref,
+ which we handle in the case above. */
+ if (TYPE_RETURNS_STACK_DEPRESSED (gnu_subprog_type))
+ gnu_ret_val
+ = build_allocator (TREE_TYPE (gnu_ret_val),
+ gnu_ret_val,
+ TREE_TYPE (gnu_subprog_type),
+ 0, -1, gnat_node);
+ else
+ gnu_ret_val
+ = build_allocator (TREE_TYPE (gnu_ret_val),
+ gnu_ret_val,
+ TREE_TYPE (gnu_subprog_type),
+ Procedure_To_Call (gnat_node),
+ Storage_Pool (gnat_node),
+ gnat_node);
+ }
}
}
- set_lineno (gnat_node, 1);
if (gnu_ret_val)
- expand_return (build_binary_op (MODIFY_EXPR, NULL_TREE,
- DECL_RESULT (current_function_decl),
- gnu_ret_val));
- else
- expand_null_return ();
+ gnu_result = build2 (MODIFY_EXPR, TREE_TYPE (gnu_ret_val),
+ gnu_lhs, gnu_ret_val);
+
+ if (TYPE_RETURNS_BY_TARGET_PTR_P (gnu_subprog_type))
+ {
+ add_stmt_with_node (gnu_result, gnat_node);
+ gnu_result = NULL_TREE;
+ }
+ gnu_result = build1 (RETURN_EXPR, void_type_node, gnu_result);
}
break;
case N_Goto_Statement:
- if (type_annotate_only)
- break;
-
- gnu_expr = gnat_to_gnu (Name (gnat_node));
- TREE_USED (gnu_expr) = 1;
- set_lineno (gnat_node, 1);
- expand_goto (gnu_expr);
+ gnu_result = build1 (GOTO_EXPR, void_type_node,
+ gnat_to_gnu (Name (gnat_node)));
break;
/****************************/
if (No (Freeze_Node (Defining_Entity (Specification (gnat_node)))))
gnat_to_gnu_entity (Defining_Entity (Specification (gnat_node)),
NULL_TREE, 1);
-
+ gnu_result = alloc_stmt_list ();
break;
case N_Abstract_Subprogram_Declaration:
&& !From_With_Type (Etype (gnat_temp)))
gnat_to_gnu_entity (Etype (gnat_temp), NULL_TREE, 0);
+ gnu_result = alloc_stmt_list ();
break;
case N_Defining_Program_Unit_Name:
/* For a child unit identifier go up a level to get the
- specificaton. We get this when we try to find the spec of
+ specification. We get this when we try to find the spec of
a child unit package that is the compilation unit being compiled. */
- gnat_to_code (Parent (gnat_node));
+ gnu_result = gnat_to_gnu (Parent (gnat_node));
break;
case N_Subprogram_Body:
- {
- /* Save debug output mode in case it is reset. */
- enum debug_info_type save_write_symbols = write_symbols;
- struct gcc_debug_hooks *save_debug_hooks = debug_hooks;
- /* Definining identifier of a parameter to the subprogram. */
- Entity_Id gnat_param;
- /* The defining identifier for the subprogram body. Note that if a
- specification has appeared before for this body, then the identifier
- occurring in that specification will also be a defining identifier
- and all the calls to this subprogram will point to that
- specification. */
- Entity_Id gnat_subprog_id
- = (Present (Corresponding_Spec (gnat_node))
- ? Corresponding_Spec (gnat_node) : Defining_Entity (gnat_node));
-
- /* The FUNCTION_DECL node corresponding to the subprogram spec. */
- tree gnu_subprog_decl;
- /* The FUNCTION_TYPE node corresponding to the subprogram spec. */
- tree gnu_subprog_type;
- tree gnu_cico_list;
-
- /* If this is a generic object or if it has been eliminated,
- ignore it. */
-
- if (Ekind (gnat_subprog_id) == E_Generic_Procedure
- || Ekind (gnat_subprog_id) == E_Generic_Function
- || Is_Eliminated (gnat_subprog_id))
+ Subprogram_Body_to_gnu (gnat_node);
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ case N_Function_Call:
+ case N_Procedure_Call_Statement:
+ gnu_result = call_to_gnu (gnat_node, &gnu_result_type, NULL_TREE);
+ break;
+
+ /*************************/
+ /* Chapter 7: Packages: */
+ /*************************/
+
+ case N_Package_Declaration:
+ gnu_result = gnat_to_gnu (Specification (gnat_node));
+ break;
+
+ case N_Package_Specification:
+
+ start_stmt_group ();
+ process_decls (Visible_Declarations (gnat_node),
+ Private_Declarations (gnat_node), Empty, true, true);
+ gnu_result = end_stmt_group ();
+ break;
+
+ case N_Package_Body:
+
+ /* If this is the body of a generic package - do nothing */
+ if (Ekind (Corresponding_Spec (gnat_node)) == E_Generic_Package)
+ {
+ gnu_result = alloc_stmt_list ();
break;
+ }
- /* If debug information is suppressed for the subprogram,
- turn debug mode off for the duration of processing. */
- if (Debug_Info_Off (gnat_subprog_id))
- {
- write_symbols = NO_DEBUG;
- debug_hooks = &do_nothing_debug_hooks;
- }
+ start_stmt_group ();
+ process_decls (Declarations (gnat_node), Empty, Empty, true, true);
- /* If this subprogram acts as its own spec, define it. Otherwise,
- just get the already-elaborated tree node. However, if this
- subprogram had its elaboration deferred, we will already have
- made a tree node for it. So treat it as not being defined in
- that case. Such a subprogram cannot have an address clause or
- a freeze node, so this test is safe, though it does disable
- some otherwise-useful error checking. */
- gnu_subprog_decl
- = gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE,
- Acts_As_Spec (gnat_node)
- && ! present_gnu_tree (gnat_subprog_id));
-
- gnu_subprog_type = TREE_TYPE (gnu_subprog_decl);
-
- /* Set the line number in the decl to correspond to that of
- the body so that the line number notes are written
- correctly. */
- set_lineno (gnat_node, 0);
- DECL_SOURCE_FILE (gnu_subprog_decl) = input_filename;
- DECL_SOURCE_LINE (gnu_subprog_decl) = lineno;
-
- begin_subprog_body (gnu_subprog_decl);
- set_lineno (gnat_node, 1);
-
- pushlevel (0);
- gnu_block_stack = tree_cons (NULL_TREE, NULL_TREE, gnu_block_stack);
- expand_start_bindings (0);
-
- gnu_cico_list = TYPE_CI_CO_LIST (gnu_subprog_type);
-
- /* If there are OUT parameters, we need to ensure that the
- return statement properly copies them out. We do this by
- making a new block and converting any inner return into a goto
- to a label at the end of the block. */
-
- if (gnu_cico_list != 0)
- {
- gnu_return_label_stack
- = tree_cons (NULL_TREE,
- build_decl (LABEL_DECL, NULL_TREE, NULL_TREE),
- gnu_return_label_stack);
- pushlevel (0);
- expand_start_bindings (0);
- }
- else
- gnu_return_label_stack
- = tree_cons (NULL_TREE, NULL_TREE, gnu_return_label_stack);
-
- /* See if there are any parameters for which we don't yet have
- GCC entities. These must be for OUT parameters for which we
- will be making VAR_DECL nodes here. Fill them in to
- TYPE_CI_CO_LIST, which must contain the empty entry as well.
- We can match up the entries because TYPE_CI_CO_LIST is in the
- order of the parameters. */
-
- for (gnat_param = First_Formal (gnat_subprog_id);
- Present (gnat_param);
- gnat_param = Next_Formal_With_Extras (gnat_param))
- if (present_gnu_tree (gnat_param))
- adjust_decl_rtl (get_gnu_tree (gnat_param));
- else
- {
- /* Skip any entries that have been already filled in; they
- must correspond to IN OUT parameters. */
- for (; gnu_cico_list != 0 && TREE_VALUE (gnu_cico_list) != 0;
- gnu_cico_list = TREE_CHAIN (gnu_cico_list))
- ;
+ if (Present (Handled_Statement_Sequence (gnat_node)))
+ add_stmt (gnat_to_gnu (Handled_Statement_Sequence (gnat_node)));
- /* Do any needed references for padded types. */
- TREE_VALUE (gnu_cico_list)
- = convert (TREE_TYPE (TREE_PURPOSE (gnu_cico_list)),
- gnat_to_gnu_entity (gnat_param, NULL_TREE, 1));
- }
+ gnu_result = end_stmt_group ();
+ break;
+
+ /*********************************/
+ /* Chapter 8: Visibility Rules: */
+ /*********************************/
+
+ case N_Use_Package_Clause:
+ case N_Use_Type_Clause:
+ /* Nothing to do here - but these may appear in list of declarations */
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ /***********************/
+ /* Chapter 9: Tasks: */
+ /***********************/
+
+ case N_Protected_Type_Declaration:
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ case N_Single_Task_Declaration:
+ gnat_to_gnu_entity (Defining_Entity (gnat_node), NULL_TREE, 1);
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ /***********************************************************/
+ /* Chapter 10: Program Structure and Compilation Issues: */
+ /***********************************************************/
+
+ case N_Compilation_Unit:
+
+ /* This is not called for the main unit, which is handled in function
+ gigi above. */
+ start_stmt_group ();
+ gnat_pushlevel ();
+
+ Compilation_Unit_to_gnu (gnat_node);
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ case N_Subprogram_Body_Stub:
+ case N_Package_Body_Stub:
+ case N_Protected_Body_Stub:
+ case N_Task_Body_Stub:
+ /* Simply process whatever unit is being inserted. */
+ gnu_result = gnat_to_gnu (Unit (Library_Unit (gnat_node)));
+ break;
+
+ case N_Subunit:
+ gnu_result = gnat_to_gnu (Proper_Body (gnat_node));
+ break;
+
+ /***************************/
+ /* Chapter 11: Exceptions: */
+ /***************************/
+
+ case N_Handled_Sequence_Of_Statements:
+ /* If there is an At_End procedure attached to this node, and the EH
+ mechanism is SJLJ, we must have at least a corresponding At_End
+ handler, unless the No_Exception_Handlers restriction is set. */
+ gcc_assert (type_annotate_only
+ || Exception_Mechanism != Setjmp_Longjmp
+ || No (At_End_Proc (gnat_node))
+ || Present (Exception_Handlers (gnat_node))
+ || No_Exception_Handlers_Set ());
+
+ gnu_result = Handled_Sequence_Of_Statements_to_gnu (gnat_node);
+ break;
+
+ case N_Exception_Handler:
+ if (Exception_Mechanism == Setjmp_Longjmp)
+ gnu_result = Exception_Handler_to_gnu_sjlj (gnat_node);
+ else if (Exception_Mechanism == GCC_ZCX)
+ gnu_result = Exception_Handler_to_gnu_zcx (gnat_node);
+ else
+ gcc_unreachable ();
+
+ break;
+
+ /*******************************/
+ /* Chapter 12: Generic Units: */
+ /*******************************/
+
+ case N_Generic_Function_Renaming_Declaration:
+ case N_Generic_Package_Renaming_Declaration:
+ case N_Generic_Procedure_Renaming_Declaration:
+ case N_Generic_Package_Declaration:
+ case N_Generic_Subprogram_Declaration:
+ case N_Package_Instantiation:
+ case N_Procedure_Instantiation:
+ case N_Function_Instantiation:
+ /* These nodes can appear on a declaration list but there is nothing to
+ to be done with them. */
+ gnu_result = alloc_stmt_list ();
+ break;
+
+ /***************************************************/
+ /* Chapter 13: Representation Clauses and */
+ /* Implementation-Dependent Features: */
+ /***************************************************/
- process_decls (Declarations (gnat_node), Empty, Empty, 1, 1);
+ case N_Attribute_Definition_Clause:
- /* Generate the code of the subprogram itself. A return statement
- will be present and any OUT parameters will be handled there. */
- gnat_to_code (Handled_Statement_Sequence (gnat_node));
+ gnu_result = alloc_stmt_list ();
- expand_end_bindings (getdecls (), kept_level_p (), 0);
- poplevel (kept_level_p (), 1, 0);
- gnu_block_stack = TREE_CHAIN (gnu_block_stack);
+ /* The only one we need deal with is for 'Address. For the others, SEM
+ puts the information elsewhere. We need only deal with 'Address
+ if the object has a Freeze_Node (which it never will currently). */
+ if (Get_Attribute_Id (Chars (gnat_node)) != Attr_Address
+ || No (Freeze_Node (Entity (Name (gnat_node)))))
+ break;
- if (TREE_VALUE (gnu_return_label_stack) != 0)
- {
- tree gnu_retval;
+ /* Get the value to use as the address and save it as the
+ equivalent for GNAT_TEMP. When the object is frozen,
+ gnat_to_gnu_entity will do the right thing. */
+ save_gnu_tree (Entity (Name (gnat_node)),
+ gnat_to_gnu (Expression (gnat_node)), true);
+ break;
- expand_end_bindings (NULL_TREE, kept_level_p (), 0);
- poplevel (kept_level_p (), 1, 0);
- expand_label (TREE_VALUE (gnu_return_label_stack));
+ case N_Enumeration_Representation_Clause:
+ case N_Record_Representation_Clause:
+ case N_At_Clause:
+ /* We do nothing with these. SEM puts the information elsewhere. */
+ gnu_result = alloc_stmt_list ();
+ break;
- gnu_cico_list = TYPE_CI_CO_LIST (gnu_subprog_type);
- set_lineno (gnat_node, 1);
- if (list_length (gnu_cico_list) == 1)
- gnu_retval = TREE_VALUE (gnu_cico_list);
- else
- gnu_retval = build_constructor (TREE_TYPE (gnu_subprog_type),
- gnu_cico_list);
+ case N_Code_Statement:
+ if (!type_annotate_only)
+ {
+ tree gnu_template = gnat_to_gnu (Asm_Template (gnat_node));
+ tree gnu_input_list = NULL_TREE, gnu_output_list = NULL_TREE;
+ tree gnu_clobber_list = NULL_TREE;
+ char *clobber;
- if (DECL_P (gnu_retval) && DECL_BY_REF_P (gnu_retval))
- gnu_retval
- = build_unary_op (INDIRECT_REF, NULL_TREE, gnu_retval);
+ /* First process inputs, then outputs, then clobbers. */
+ Setup_Asm_Inputs (gnat_node);
+ while (Present (gnat_temp = Asm_Input_Value ()))
+ {
+ tree gnu_value = gnat_to_gnu (gnat_temp);
+ tree gnu_constr = build_tree_list (NULL_TREE, gnat_to_gnu
+ (Asm_Input_Constraint ()));
- expand_return
- (build_binary_op (MODIFY_EXPR, NULL_TREE,
- DECL_RESULT (current_function_decl),
- gnu_retval));
+ gnu_input_list
+ = tree_cons (gnu_constr, gnu_value, gnu_input_list);
+ Next_Asm_Input ();
+ }
- }
+ Setup_Asm_Outputs (gnat_node);
+ while (Present (gnat_temp = Asm_Output_Variable ()))
+ {
+ tree gnu_value = gnat_to_gnu (gnat_temp);
+ tree gnu_constr = build_tree_list (NULL_TREE, gnat_to_gnu
+ (Asm_Output_Constraint ()));
- gnu_return_label_stack = TREE_CHAIN (gnu_return_label_stack);
-
- /* Disconnect the trees for parameters that we made variables for
- from the GNAT entities since these will become unusable after
- we end the function. */
- for (gnat_param = First_Formal (gnat_subprog_id);
- Present (gnat_param);
- gnat_param = Next_Formal_With_Extras (gnat_param))
- if (TREE_CODE (get_gnu_tree (gnat_param)) == VAR_DECL)
- save_gnu_tree (gnat_param, NULL_TREE, 0);
-
- end_subprog_body ();
- mark_out_of_scope (Defining_Unit_Name (Specification (gnat_node)));
- write_symbols = save_write_symbols;
- debug_hooks = save_debug_hooks;
- }
- break;
+ gnu_output_list
+ = tree_cons (gnu_constr, gnu_value, gnu_output_list);
+ Next_Asm_Output ();
+ }
- case N_Function_Call:
- case N_Procedure_Call_Statement:
+ Clobber_Setup (gnat_node);
+ while ((clobber = Clobber_Get_Next ()))
+ gnu_clobber_list
+ = tree_cons (NULL_TREE,
+ build_string (strlen (clobber) + 1, clobber),
+ gnu_clobber_list);
- if (type_annotate_only)
- break;
+ gnu_input_list = nreverse (gnu_input_list);
+ gnu_output_list = nreverse (gnu_output_list);
+ gnu_result = build4 (ASM_EXPR, void_type_node,
+ gnu_template, gnu_output_list,
+ gnu_input_list, gnu_clobber_list);
+ ASM_VOLATILE_P (gnu_result) = Is_Asm_Volatile (gnat_node);
+ }
+ else
+ gnu_result = alloc_stmt_list ();
- {
- /* The GCC node corresponding to the GNAT subprogram name. This can
- either be a FUNCTION_DECL node if we are dealing with a standard
- subprogram call, or an indirect reference expression (an
- INDIRECT_REF node) pointing to a subprogram. */
- tree gnu_subprog_node = gnat_to_gnu (Name (gnat_node));
- /* The FUNCTION_TYPE node giving the GCC type of the subprogram. */
- tree gnu_subprog_type = TREE_TYPE (gnu_subprog_node);
- tree gnu_subprog_addr
- = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_subprog_node);
- Entity_Id gnat_formal;
- Node_Id gnat_actual;
- tree gnu_actual_list = NULL_TREE;
- tree gnu_name_list = NULL_TREE;
- tree gnu_after_list = NULL_TREE;
- tree gnu_subprog_call;
-
- switch (Nkind (Name (gnat_node)))
- {
- case N_Identifier:
- case N_Operator_Symbol:
- case N_Expanded_Name:
- case N_Attribute_Reference:
- if (Is_Eliminated (Entity (Name (gnat_node))))
- post_error_ne ("cannot call eliminated subprogram &!",
- gnat_node, Entity (Name (gnat_node)));
- }
+ break;
- if (TREE_CODE (gnu_subprog_type) != FUNCTION_TYPE)
- gigi_abort (317);
+ /***************************************************/
+ /* Added Nodes */
+ /***************************************************/
- /* If we are calling a stubbed function, make this into a
- raise of Program_Error. Elaborate all our args first. */
+ case N_Freeze_Entity:
+ start_stmt_group ();
+ process_freeze_entity (gnat_node);
+ process_decls (Actions (gnat_node), Empty, Empty, true, true);
+ gnu_result = end_stmt_group ();
+ break;
- if (TREE_CODE (gnu_subprog_node) == FUNCTION_DECL
- && DECL_STUBBED_P (gnu_subprog_node))
- {
- for (gnat_actual = First_Actual (gnat_node);
- Present (gnat_actual);
- gnat_actual = Next_Actual (gnat_actual))
- expand_expr_stmt (gnat_to_gnu (gnat_actual));
+ case N_Itype_Reference:
+ if (!present_gnu_tree (Itype (gnat_node)))
+ process_type (Itype (gnat_node));
- if (Nkind (gnat_node) == N_Function_Call)
- {
- gnu_result_type = TREE_TYPE (gnu_subprog_type);
- gnu_result
- = build1 (NULL_EXPR, gnu_result_type,
- build_call_raise (raise_program_error_decl));
- }
- else
- expand_expr_stmt (build_call_raise (raise_program_error_decl));
- break;
- }
+ gnu_result = alloc_stmt_list ();
+ break;
- /* The only way we can be making a call via an access type is
- if Name is an explicit dereference. In that case, get the
- list of formal args from the type the access type is pointing
- to. Otherwise, get the formals from entity being called. */
- if (Nkind (Name (gnat_node)) == N_Explicit_Dereference)
- gnat_formal = First_Formal (Etype (Name (gnat_node)));
- else if (Nkind (Name (gnat_node)) == N_Attribute_Reference)
- /* Assume here that this must be 'Elab_Body or 'Elab_Spec. */
- gnat_formal = 0;
- else
- gnat_formal = First_Formal (Entity (Name (gnat_node)));
+ case N_Free_Statement:
+ if (!type_annotate_only)
+ {
+ tree gnu_ptr = gnat_to_gnu (Expression (gnat_node));
+ tree gnu_obj_type;
+ tree gnu_obj_size;
+ int align;
- /* Create the list of the actual parameters as GCC expects it, namely
- a chain of TREE_LIST nodes in which the TREE_VALUE field of each
- node is a parameter-expression and the TREE_PURPOSE field is
- null. Skip OUT parameters that are not passed by reference. */
+ /* If this is a thin pointer, we must dereference it to create
+ a fat pointer, then go back below to a thin pointer. The
+ reason for this is that we need a fat pointer someplace in
+ order to properly compute the size. */
+ if (TYPE_THIN_POINTER_P (TREE_TYPE (gnu_ptr)))
+ gnu_ptr = build_unary_op (ADDR_EXPR, NULL_TREE,
+ build_unary_op (INDIRECT_REF, NULL_TREE,
+ gnu_ptr));
- for (gnat_actual = First_Actual (gnat_node);
- Present (gnat_actual);
- gnat_formal = Next_Formal_With_Extras (gnat_formal),
- gnat_actual = Next_Actual (gnat_actual))
- {
- tree gnu_formal_type = gnat_to_gnu_type (Etype (gnat_formal));
- Node_Id gnat_name
- = ((Nkind (gnat_actual) == N_Unchecked_Type_Conversion)
- ? Expression (gnat_actual) : gnat_actual);
- tree gnu_name = gnat_to_gnu (gnat_name);
- tree gnu_name_type = gnat_to_gnu_type (Etype (gnat_name));
- tree gnu_actual;
-
- /* If it's possible we may need to use this expression twice,
- make sure than any side-effects are handled via SAVE_EXPRs.
- Likewise if we need to force side-effects before the call.
- ??? This is more conservative than we need since we don't
- need to do this for pass-by-ref with no conversion.
- If we are passing a non-addressable Out or In Out parameter by
- reference, pass the address of a copy and set up to copy back
- out after the call. */
-
- if (Ekind (gnat_formal) != E_In_Parameter)
- {
- gnu_name = gnat_stabilize_reference (gnu_name, 1);
- if (! addressable_p (gnu_name)
- && present_gnu_tree (gnat_formal)
- && (DECL_BY_REF_P (get_gnu_tree (gnat_formal))
- || DECL_BY_COMPONENT_PTR_P (get_gnu_tree (gnat_formal))
- || DECL_BY_DESCRIPTOR_P (get_gnu_tree (gnat_formal))))
- {
- tree gnu_copy = gnu_name;
-
- /* Remove any unpadding on the actual and make a copy.
- But if the actual is a left-justified modular type,
- first convert to it. */
- if (TREE_CODE (gnu_name) == COMPONENT_REF
- && (TYPE_IS_PADDING_P
- (TREE_TYPE (TREE_OPERAND (gnu_name, 0)))))
- gnu_name = gnu_copy = TREE_OPERAND (gnu_name, 0);
- else if (TREE_CODE (gnu_name_type) == RECORD_TYPE
- && (TYPE_LEFT_JUSTIFIED_MODULAR_P
- (gnu_name_type)))
- gnu_name = convert (gnu_name_type, gnu_name);
-
- gnu_actual = save_expr (gnu_name);
-
- /* Set up to move the copy back to the original. */
- gnu_after_list = tree_cons (gnu_copy, gnu_actual,
- gnu_after_list);
-
- gnu_name = gnu_actual;
- }
- }
+ /* If this is an unconstrained array, we know the object must
+ have been allocated with the template in front of the object.
+ So pass the template address, but get the total size. Do this
+ by converting to a thin pointer. */
+ if (TYPE_FAT_POINTER_P (TREE_TYPE (gnu_ptr)))
+ gnu_ptr
+ = convert (build_pointer_type
+ (TYPE_OBJECT_RECORD_TYPE
+ (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (gnu_ptr)))),
+ gnu_ptr);
- /* If this was a procedure call, we may not have removed any
- padding. So do it here for the part we will use as an
- input, if any. */
- gnu_actual = gnu_name;
- if (Ekind (gnat_formal) != E_Out_Parameter
- && TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE
- && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual)))
- gnu_actual = convert (get_unpadded_type (Etype (gnat_actual)),
- gnu_actual);
-
- if (Ekind (gnat_formal) != E_Out_Parameter
- && Nkind (gnat_actual) != N_Unchecked_Type_Conversion
- && Do_Range_Check (gnat_actual))
- gnu_actual = emit_range_check (gnu_actual, Etype (gnat_formal));
-
- /* Do any needed conversions. We need only check for
- unchecked conversion since normal conversions will be handled
- by just converting to the formal type. */
- if (Nkind (gnat_actual) == N_Unchecked_Type_Conversion)
- {
- gnu_actual
- = unchecked_convert (gnat_to_gnu_type (Etype (gnat_actual)),
- gnu_actual);
-
- /* One we've done the unchecked conversion, we still
- must ensure that the object is in range of the formal's
- type. */
- if (Ekind (gnat_formal) != E_Out_Parameter
- && Do_Range_Check (gnat_actual))
- gnu_actual = emit_range_check (gnu_actual,
- Etype (gnat_formal));
- }
- else
- /* We may have suppressed a conversion to the Etype of the
- actual since the parent is a procedure call. So add the
- conversion here. */
- gnu_actual = convert (gnat_to_gnu_type (Etype (gnat_actual)),
- gnu_actual);
-
- gnu_actual = convert (gnu_formal_type, gnu_actual);
-
- /* If we have not saved a GCC object for the formal, it means
- it is an OUT parameter not passed by reference. Otherwise,
- look at the PARM_DECL to see if it is passed by reference. */
- if (present_gnu_tree (gnat_formal)
- && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL
- && DECL_BY_REF_P (get_gnu_tree (gnat_formal)))
- {
- if (Ekind (gnat_formal) != E_In_Parameter)
- {
- gnu_actual = gnu_name;
-
- /* If we have a padded type, be sure we've removed the
- padding. */
- if (TREE_CODE (TREE_TYPE (gnu_actual)) == RECORD_TYPE
- && TYPE_IS_PADDING_P (TREE_TYPE (gnu_actual)))
- gnu_actual
- = convert (get_unpadded_type (Etype (gnat_actual)),
- gnu_actual);
- }
+ gnu_obj_type = TREE_TYPE (TREE_TYPE (gnu_ptr));
+ gnu_obj_size = TYPE_SIZE_UNIT (gnu_obj_type);
+ align = TYPE_ALIGN (gnu_obj_type);
- /* The symmetry of the paths to the type of an entity is
- broken here since arguments don't know that they will
- be passed by ref. */
- gnu_formal_type = TREE_TYPE (get_gnu_tree (gnat_formal));
- gnu_actual = build_unary_op (ADDR_EXPR, gnu_formal_type,
- gnu_actual);
- }
- else if (present_gnu_tree (gnat_formal)
- && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL
- && DECL_BY_COMPONENT_PTR_P (get_gnu_tree (gnat_formal)))
- {
- gnu_formal_type = TREE_TYPE (get_gnu_tree (gnat_formal));
- gnu_actual = maybe_implicit_deref (gnu_actual);
- gnu_actual = maybe_unconstrained_array (gnu_actual);
+ if (TREE_CODE (gnu_obj_type) == RECORD_TYPE
+ && TYPE_CONTAINS_TEMPLATE_P (gnu_obj_type))
+ {
+ tree gnu_char_ptr_type = build_pointer_type (char_type_node);
+ tree gnu_pos = byte_position (TYPE_FIELDS (gnu_obj_type));
+ tree gnu_byte_offset
+ = convert (gnu_char_ptr_type,
+ size_diffop (size_zero_node, gnu_pos));
- if (TREE_CODE (gnu_formal_type) == RECORD_TYPE
- && TYPE_IS_PADDING_P (gnu_formal_type))
- {
- gnu_formal_type
- = TREE_TYPE (TYPE_FIELDS (gnu_formal_type));
- gnu_actual = convert (gnu_formal_type, gnu_actual);
- }
+ gnu_ptr = convert (gnu_char_ptr_type, gnu_ptr);
+ gnu_ptr = build_binary_op (MINUS_EXPR, gnu_char_ptr_type,
+ gnu_ptr, gnu_byte_offset);
+ }
- /* Take the address of the object and convert to the
- proper pointer type. We'd like to actually compute
- the address of the beginning of the array using
- an ADDR_EXPR of an ARRAY_REF, but there's a possibility
- that the ARRAY_REF might return a constant and we'd
- be getting the wrong address. Neither approach is
- exactly correct, but this is the most likely to work
- in all cases. */
- gnu_actual = convert (gnu_formal_type,
- build_unary_op (ADDR_EXPR, NULL_TREE,
- gnu_actual));
- }
- else if (present_gnu_tree (gnat_formal)
- && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL
- && DECL_BY_DESCRIPTOR_P (get_gnu_tree (gnat_formal)))
- {
- /* If arg is 'Null_Parameter, pass zero descriptor. */
- if ((TREE_CODE (gnu_actual) == INDIRECT_REF
- || TREE_CODE (gnu_actual) == UNCONSTRAINED_ARRAY_REF)
- && TREE_PRIVATE (gnu_actual))
- gnu_actual
- = convert (DECL_ARG_TYPE (get_gnu_tree (gnat_formal)),
- integer_zero_node);
- else
- gnu_actual
- = build_unary_op (ADDR_EXPR, NULL_TREE,
- fill_vms_descriptor (gnu_actual,
- gnat_formal));
- }
- else
- {
- tree gnu_actual_size = TYPE_SIZE (TREE_TYPE (gnu_actual));
-
- if (Ekind (gnat_formal) != E_In_Parameter)
- gnu_name_list
- = chainon (gnu_name_list,
- build_tree_list (NULL_TREE, gnu_name));
-
- if (! present_gnu_tree (gnat_formal)
- || TREE_CODE (get_gnu_tree (gnat_formal)) != PARM_DECL)
- continue;
-
- /* If this is 'Null_Parameter, pass a zero even though we are
- dereferencing it. */
- else if (TREE_CODE (gnu_actual) == INDIRECT_REF
- && TREE_PRIVATE (gnu_actual)
- && host_integerp (gnu_actual_size, 1)
- && 0 >= compare_tree_int (gnu_actual_size,
- BITS_PER_WORD))
- gnu_actual
- = unchecked_convert
- (DECL_ARG_TYPE (get_gnu_tree (gnat_formal)),
- convert (type_for_size
- (tree_low_cst (gnu_actual_size, 1), 1),
- integer_zero_node));
- else
- gnu_actual
- = convert (TYPE_MAIN_VARIANT
- (DECL_ARG_TYPE (get_gnu_tree (gnat_formal))),
- gnu_actual);
- }
+ gnu_result = build_call_alloc_dealloc (gnu_ptr, gnu_obj_size, align,
+ Procedure_To_Call (gnat_node),
+ Storage_Pool (gnat_node),
+ gnat_node);
+ }
+ break;
- gnu_actual_list
- = chainon (gnu_actual_list,
- build_tree_list (NULL_TREE, gnu_actual));
- }
+ case N_Raise_Constraint_Error:
+ case N_Raise_Program_Error:
+ case N_Raise_Storage_Error:
+ if (type_annotate_only)
+ {
+ gnu_result = alloc_stmt_list ();
+ break;
+ }
- gnu_subprog_call = build (CALL_EXPR, TREE_TYPE (gnu_subprog_type),
- gnu_subprog_addr, gnu_actual_list,
- NULL_TREE);
- TREE_SIDE_EFFECTS (gnu_subprog_call) = 1;
+ gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ gnu_result = build_call_raise (UI_To_Int (Reason (gnat_node)));
- /* If it is a function call, the result is the call expression. */
- if (Nkind (gnat_node) == N_Function_Call)
- {
- gnu_result = gnu_subprog_call;
+ /* If the type is VOID, this is a statement, so we need to
+ generate the code for the call. Handle a Condition, if there
+ is one. */
+ if (TREE_CODE (gnu_result_type) == VOID_TYPE)
+ {
+ annotate_with_node (gnu_result, gnat_node);
- /* If the function returns an unconstrained array or by reference,
- we have to de-dereference the pointer. */
- if (TYPE_RETURNS_UNCONSTRAINED_P (gnu_subprog_type)
- || TYPE_RETURNS_BY_REF_P (gnu_subprog_type))
- gnu_result = build_unary_op (INDIRECT_REF, NULL_TREE,
- gnu_result);
+ if (Present (Condition (gnat_node)))
+ gnu_result = build3 (COND_EXPR, void_type_node,
+ gnat_to_gnu (Condition (gnat_node)),
+ gnu_result, alloc_stmt_list ());
+ }
+ else
+ gnu_result = build1 (NULL_EXPR, gnu_result_type, gnu_result);
+ break;
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
+ case N_Validate_Unchecked_Conversion:
+ /* If the result is a pointer type, see if we are either converting
+ from a non-pointer or from a pointer to a type with a different
+ alias set and warn if so. If the result defined in the same unit as
+ this unchecked conversion, we can allow this because we can know to
+ make that type have alias set 0. */
+ {
+ tree gnu_source_type = gnat_to_gnu_type (Source_Type (gnat_node));
+ tree gnu_target_type = gnat_to_gnu_type (Target_Type (gnat_node));
+
+ if (POINTER_TYPE_P (gnu_target_type)
+ && !In_Same_Source_Unit (Target_Type (gnat_node), gnat_node)
+ && get_alias_set (TREE_TYPE (gnu_target_type)) != 0
+ && !No_Strict_Aliasing (Underlying_Type (Target_Type (gnat_node)))
+ && (!POINTER_TYPE_P (gnu_source_type)
+ || (get_alias_set (TREE_TYPE (gnu_source_type))
+ != get_alias_set (TREE_TYPE (gnu_target_type)))))
+ {
+ post_error_ne
+ ("?possible aliasing problem for type&",
+ gnat_node, Target_Type (gnat_node));
+ post_error
+ ("\\?use -fno-strict-aliasing switch for references",
+ gnat_node);
+ post_error_ne
+ ("\\?or use `pragma No_Strict_Aliasing (&);`",
+ gnat_node, Target_Type (gnat_node));
}
- /* If this is the case where the GNAT tree contains a procedure call
- but the Ada procedure has copy in copy out parameters, the special
- parameter passing mechanism must be used. */
- else if (TYPE_CI_CO_LIST (gnu_subprog_type) != NULL_TREE)
+ /* The No_Strict_Aliasing flag is not propagated to the back-end for
+ fat pointers so unconditionally warn in problematic cases. */
+ else if (TYPE_FAT_POINTER_P (gnu_target_type))
{
- /* List of FIELD_DECLs associated with the PARM_DECLs of the copy
- in copy out parameters. */
- tree scalar_return_list = TYPE_CI_CO_LIST (gnu_subprog_type);
- int length = list_length (scalar_return_list);
+ tree array_type
+ = TREE_TYPE (TREE_TYPE (TYPE_FIELDS (gnu_target_type)));
- if (length > 1)
+ if (get_alias_set (array_type) != 0
+ && (!TYPE_FAT_POINTER_P (gnu_source_type)
+ || (get_alias_set (TREE_TYPE (TREE_TYPE (TYPE_FIELDS (gnu_source_type))))
+ != get_alias_set (array_type))))
{
- tree gnu_name;
-
- gnu_subprog_call = make_save_expr (gnu_subprog_call);
-
- /* If any of the names had side-effects, ensure they are
- all evaluated before the call. */
- for (gnu_name = gnu_name_list; gnu_name;
- gnu_name = TREE_CHAIN (gnu_name))
- if (TREE_SIDE_EFFECTS (TREE_VALUE (gnu_name)))
- gnu_subprog_call
- = build (COMPOUND_EXPR, TREE_TYPE (gnu_subprog_call),
- TREE_VALUE (gnu_name), gnu_subprog_call);
+ post_error_ne
+ ("?possible aliasing problem for type&",
+ gnat_node, Target_Type (gnat_node));
+ post_error
+ ("\\?use -fno-strict-aliasing switch for references",
+ gnat_node);
}
-
- if (Nkind (Name (gnat_node)) == N_Explicit_Dereference)
- gnat_formal = First_Formal (Etype (Name (gnat_node)));
- else
- gnat_formal = First_Formal (Entity (Name (gnat_node)));
-
- for (gnat_actual = First_Actual (gnat_node);
- Present (gnat_actual);
- gnat_formal = Next_Formal_With_Extras (gnat_formal),
- gnat_actual = Next_Actual (gnat_actual))
- /* If we are dealing with a copy in copy out parameter, we must
- retrieve its value from the record returned in the function
- call. */
- if (! (present_gnu_tree (gnat_formal)
- && TREE_CODE (get_gnu_tree (gnat_formal)) == PARM_DECL
- && (DECL_BY_REF_P (get_gnu_tree (gnat_formal))
- || (DECL_BY_COMPONENT_PTR_P
- (get_gnu_tree (gnat_formal)))
- || DECL_BY_DESCRIPTOR_P (get_gnu_tree (gnat_formal))))
- && Ekind (gnat_formal) != E_In_Parameter)
- {
- /* Get the value to assign to this OUT or IN OUT
- parameter. It is either the result of the function if
- there is only a single such parameter or the appropriate
- field from the record returned. */
- tree gnu_result
- = length == 1 ? gnu_subprog_call
- : build_component_ref
- (gnu_subprog_call, NULL_TREE,
- TREE_PURPOSE (scalar_return_list));
- int unchecked_conversion
- = Nkind (gnat_actual) == N_Unchecked_Type_Conversion;
- /* If the actual is a conversion, get the inner expression,
- which will be the real destination, and convert the
- result to the type of the actual parameter. */
- tree gnu_actual
- = maybe_unconstrained_array (TREE_VALUE (gnu_name_list));
-
- /* If the result is a padded type, remove the padding. */
- if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
- && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result)))
- gnu_result
- = convert (TREE_TYPE (TYPE_FIELDS
- (TREE_TYPE (gnu_result))),
- gnu_result);
-
- /* If the result is a type conversion, do it. */
- if (Nkind (gnat_actual) == N_Type_Conversion)
- gnu_result
- = convert_with_check
- (Etype (Expression (gnat_actual)), gnu_result,
- Do_Overflow_Check (gnat_actual),
- Do_Range_Check (Expression (gnat_actual)),
- Float_Truncate (gnat_actual));
-
- else if (unchecked_conversion)
- gnu_result
- = unchecked_convert (TREE_TYPE (gnu_actual), gnu_result);
- else
- {
- if (Do_Range_Check (gnat_actual))
- gnu_result = emit_range_check (gnu_result,
- Etype (gnat_actual));
-
- if (! (! TREE_CONSTANT (TYPE_SIZE
- (TREE_TYPE (gnu_actual)))
- && TREE_CONSTANT (TYPE_SIZE
- (TREE_TYPE (gnu_result)))))
- gnu_result = convert (TREE_TYPE (gnu_actual),
- gnu_result);
- }
-
- set_lineno (gnat_node, 1);
- expand_expr_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE,
- gnu_actual, gnu_result));
- scalar_return_list = TREE_CHAIN (scalar_return_list);
- gnu_name_list = TREE_CHAIN (gnu_name_list);
- }
- }
- else
- {
- set_lineno (gnat_node, 1);
- expand_expr_stmt (gnu_subprog_call);
}
-
- /* Handle anything we need to assign back. */
- for (gnu_expr = gnu_after_list;
- gnu_expr;
- gnu_expr = TREE_CHAIN (gnu_expr))
- expand_expr_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE,
- TREE_PURPOSE (gnu_expr),
- TREE_VALUE (gnu_expr)));
}
+ gnu_result = alloc_stmt_list ();
break;
- /*************************/
- /* Chapter 7: Packages: */
- /*************************/
-
- case N_Package_Declaration:
- gnat_to_code (Specification (gnat_node));
- break;
-
- case N_Package_Specification:
-
- process_decls (Visible_Declarations (gnat_node),
- Private_Declarations (gnat_node), Empty, 1, 1);
- break;
-
- case N_Package_Body:
+ case N_Raise_Statement:
+ case N_Function_Specification:
+ case N_Procedure_Specification:
+ case N_Op_Concat:
+ case N_Component_Association:
+ case N_Task_Body:
+ default:
+ gcc_assert (type_annotate_only);
+ gnu_result = alloc_stmt_list ();
+ }
- /* If this is the body of a generic package - do nothing */
- if (Ekind (Corresponding_Spec (gnat_node)) == E_Generic_Package)
- break;
+ /* If we pushed our level as part of processing the elaboration routine,
+ pop it back now. */
+ if (went_into_elab_proc)
+ {
+ add_stmt (gnu_result);
+ gnat_poplevel ();
+ gnu_result = end_stmt_group ();
+ current_function_decl = NULL_TREE;
+ }
- process_decls (Declarations (gnat_node), Empty, Empty, 1, 1);
+ /* Set the location information into the result. Note that we may have
+ no result if we tried to build a CALL_EXPR node to a procedure with
+ no side-effects and optimization is enabled. */
+ if (gnu_result && EXPR_P (gnu_result))
+ annotate_with_node (gnu_result, gnat_node);
- if (Present (Handled_Statement_Sequence (gnat_node)))
- {
- gnu_block_stack = tree_cons (NULL_TREE, NULL_TREE, gnu_block_stack);
- gnat_to_code (Handled_Statement_Sequence (gnat_node));
- gnu_block_stack = TREE_CHAIN (gnu_block_stack);
- }
- break;
+ /* If we're supposed to return something of void_type, it means we have
+ something we're elaborating for effect, so just return. */
+ if (TREE_CODE (gnu_result_type) == VOID_TYPE)
+ return gnu_result;
- /*********************************/
- /* Chapter 8: Visibility Rules: */
- /*********************************/
+ /* If the result is a constant that overflows, raise constraint error. */
+ else if (TREE_CODE (gnu_result) == INTEGER_CST
+ && TREE_CONSTANT_OVERFLOW (gnu_result))
+ {
+ post_error ("Constraint_Error will be raised at run-time?", gnat_node);
- case N_Use_Package_Clause:
- case N_Use_Type_Clause:
- /* Nothing to do here - but these may appear in list of declarations */
- break;
+ gnu_result
+ = build1 (NULL_EXPR, gnu_result_type,
+ build_call_raise (CE_Overflow_Check_Failed));
+ }
- /***********************/
- /* Chapter 9: Tasks: */
- /***********************/
+ /* If our result has side-effects and is of an unconstrained type,
+ make a SAVE_EXPR so that we can be sure it will only be referenced
+ once. Note we must do this before any conversions. */
+ if (TREE_SIDE_EFFECTS (gnu_result)
+ && (TREE_CODE (gnu_result_type) == UNCONSTRAINED_ARRAY_TYPE
+ || CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type))))
+ gnu_result = gnat_stabilize_reference (gnu_result, 0);
- case N_Protected_Type_Declaration:
- break;
+ /* Now convert the result to the proper type. If the type is void or if
+ we have no result, return error_mark_node to show we have no result.
+ If the type of the result is correct or if we have a label (which doesn't
+ have any well-defined type), return our result. Also don't do the
+ conversion if the "desired" type involves a PLACEHOLDER_EXPR in its size
+ since those are the cases where the front end may have the type wrong due
+ to "instantiating" the unconstrained record with discriminant values
+ or if this is a FIELD_DECL. If this is the Name of an assignment
+ statement or a parameter of a procedure call, return what we have since
+ the RHS has to be converted to our type there in that case, unless
+ GNU_RESULT_TYPE has a simpler size. Similarly, if the two types are
+ record types with the same name, the expression type has integral mode,
+ and GNU_RESULT_TYPE BLKmode, don't convert. This will be the case when
+ we are converting from a packable type to its actual type and we need
+ those conversions to be NOPs in order for assignments into these types to
+ work properly if the inner object is a bitfield and hence can't have
+ its address taken. Finally, don't convert integral types that are the
+ operand of an unchecked conversion since we need to ignore those
+ conversions (for 'Valid). Otherwise, convert the result to the proper
+ type. */
- case N_Single_Task_Declaration:
- gnat_to_gnu_entity (Defining_Entity (gnat_node), NULL_TREE, 1);
- break;
+ if (Present (Parent (gnat_node))
+ && ((Nkind (Parent (gnat_node)) == N_Assignment_Statement
+ && Name (Parent (gnat_node)) == gnat_node)
+ || (Nkind (Parent (gnat_node)) == N_Procedure_Call_Statement
+ && Name (Parent (gnat_node)) != gnat_node)
+ || (Nkind (Parent (gnat_node)) == N_Unchecked_Type_Conversion
+ && !AGGREGATE_TYPE_P (gnu_result_type)
+ && !AGGREGATE_TYPE_P (TREE_TYPE (gnu_result)))
+ || Nkind (Parent (gnat_node)) == N_Parameter_Association)
+ && !(TYPE_SIZE (gnu_result_type)
+ && TYPE_SIZE (TREE_TYPE (gnu_result))
+ && (AGGREGATE_TYPE_P (gnu_result_type)
+ == AGGREGATE_TYPE_P (TREE_TYPE (gnu_result)))
+ && ((TREE_CODE (TYPE_SIZE (gnu_result_type)) == INTEGER_CST
+ && (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_result)))
+ != INTEGER_CST))
+ || (TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST
+ && !CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type))
+ && (CONTAINS_PLACEHOLDER_P
+ (TYPE_SIZE (TREE_TYPE (gnu_result))))))
+ && !(TREE_CODE (gnu_result_type) == RECORD_TYPE
+ && TYPE_JUSTIFIED_MODULAR_P (gnu_result_type))))
+ {
+ /* In this case remove padding only if the inner object is of
+ self-referential size: in that case it must be an object of
+ unconstrained type with a default discriminant. In other cases,
+ we want to avoid copying too much data. */
+ if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result))
+ && CONTAINS_PLACEHOLDER_P (TYPE_SIZE
+ (TREE_TYPE (TYPE_FIELDS
+ (TREE_TYPE (gnu_result))))))
+ gnu_result = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result))),
+ gnu_result);
+ }
- /***********************************************************/
- /* Chapter 10: Program Structure and Compilation Issues: */
- /***********************************************************/
+ else if (TREE_CODE (gnu_result) == LABEL_DECL
+ || TREE_CODE (gnu_result) == FIELD_DECL
+ || TREE_CODE (gnu_result) == ERROR_MARK
+ || (TYPE_SIZE (gnu_result_type)
+ && TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST
+ && TREE_CODE (gnu_result) != INDIRECT_REF
+ && CONTAINS_PLACEHOLDER_P (TYPE_SIZE (gnu_result_type)))
+ || ((TYPE_NAME (gnu_result_type)
+ == TYPE_NAME (TREE_TYPE (gnu_result)))
+ && TREE_CODE (gnu_result_type) == RECORD_TYPE
+ && TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
+ && TYPE_MODE (gnu_result_type) == BLKmode
+ && (GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (gnu_result)))
+ == MODE_INT)))
+ {
+ /* Remove any padding record, but do nothing more in this case. */
+ if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result)))
+ gnu_result = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result))),
+ gnu_result);
+ }
- case N_Compilation_Unit:
+ else if (gnu_result == error_mark_node
+ || gnu_result_type == void_type_node)
+ gnu_result = error_mark_node;
+ else if (gnu_result_type != TREE_TYPE (gnu_result))
+ gnu_result = convert (gnu_result_type, gnu_result);
- /* For a body, first process the spec if there is one. */
- if (Nkind (Unit (gnat_node)) == N_Package_Body
- || (Nkind (Unit (gnat_node)) == N_Subprogram_Body
- && ! Acts_As_Spec (gnat_node)))
- gnat_to_code (Library_Unit (gnat_node));
+ /* We don't need any NOP_EXPR or NON_LVALUE_EXPR on GNU_RESULT. */
+ while ((TREE_CODE (gnu_result) == NOP_EXPR
+ || TREE_CODE (gnu_result) == NON_LVALUE_EXPR)
+ && TREE_TYPE (TREE_OPERAND (gnu_result, 0)) == TREE_TYPE (gnu_result))
+ gnu_result = TREE_OPERAND (gnu_result, 0);
- process_inlined_subprograms (gnat_node);
+ return gnu_result;
+}
+\f
+/* Record the current code position in GNAT_NODE. */
- if (type_annotate_only && gnat_node == Cunit (Main_Unit))
- {
- elaborate_all_entities (gnat_node);
+static void
+record_code_position (Node_Id gnat_node)
+{
+ tree stmt_stmt = build1 (STMT_STMT, void_type_node, NULL_TREE);
- if (Nkind (Unit (gnat_node)) == N_Subprogram_Declaration
- || Nkind (Unit (gnat_node)) == N_Generic_Package_Declaration
- || Nkind (Unit (gnat_node)) == N_Generic_Subprogram_Declaration)
- break;
- };
-
- process_decls (Declarations (Aux_Decls_Node (gnat_node)),
- Empty, Empty, 1, 1);
-
- gnat_to_code (Unit (gnat_node));
-
- /* Process any pragmas following the unit. */
- if (Present (Pragmas_After (Aux_Decls_Node (gnat_node))))
- for (gnat_temp = First (Pragmas_After (Aux_Decls_Node (gnat_node)));
- gnat_temp; gnat_temp = Next (gnat_temp))
- gnat_to_code (gnat_temp);
-
- /* Put all the Actions into the elaboration routine if we already had
- elaborations. This will happen anyway if they are statements, but we
- want to force declarations there too due to order-of-elaboration
- issues. Most should have Is_Statically_Allocated set. If we
- have had no elaborations, we have no order-of-elaboration issue and
- don't want to create elaborations here. */
- if (Is_Non_Empty_List (Actions (Aux_Decls_Node (gnat_node))))
- for (gnat_temp = First (Actions (Aux_Decls_Node (gnat_node)));
- Present (gnat_temp); gnat_temp = Next (gnat_temp))
- {
- if (pending_elaborations_p ())
- add_pending_elaborations (NULL_TREE,
- make_transform_expr (gnat_temp));
- else
- gnat_to_code (gnat_temp);
- }
+ add_stmt_with_node (stmt_stmt, gnat_node);
+ save_gnu_tree (gnat_node, stmt_stmt, true);
+}
- /* Generate elaboration code for this unit, if necessary, and
- say whether we did or not. */
- Set_Has_No_Elaboration_Code
- (gnat_node,
- build_unit_elab
- (Defining_Entity (Unit (gnat_node)),
- Nkind (Unit (gnat_node)) == N_Package_Body
- || Nkind (Unit (gnat_node)) == N_Subprogram_Body,
- get_pending_elaborations ()));
+/* Insert the code for GNAT_NODE at the position saved for that node. */
- break;
+static void
+insert_code_for (Node_Id gnat_node)
+{
+ STMT_STMT_STMT (get_gnu_tree (gnat_node)) = gnat_to_gnu (gnat_node);
+ save_gnu_tree (gnat_node, NULL_TREE, true);
+}
+\f
+/* Start a new statement group chained to the previous group. */
- case N_Subprogram_Body_Stub:
- case N_Package_Body_Stub:
- case N_Protected_Body_Stub:
- case N_Task_Body_Stub:
- /* Simply process whatever unit is being inserted. */
- gnat_to_code (Unit (Library_Unit (gnat_node)));
- break;
+static void
+start_stmt_group ()
+{
+ struct stmt_group *group = stmt_group_free_list;
- case N_Subunit:
- gnat_to_code (Proper_Body (gnat_node));
- break;
+ /* First see if we can get one from the free list. */
+ if (group)
+ stmt_group_free_list = group->previous;
+ else
+ group = (struct stmt_group *) ggc_alloc (sizeof (struct stmt_group));
- /***************************/
- /* Chapter 11: Exceptions: */
- /***************************/
+ group->previous = current_stmt_group;
+ group->stmt_list = group->block = group->cleanups = NULL_TREE;
+ current_stmt_group = group;
+}
- case N_Handled_Sequence_Of_Statements:
- /* If there are exception handlers, start a new binding level that
- we can exit (since each exception handler will do so). Then
- declare a variable to save the old __gnat_jmpbuf value and a
- variable for our jmpbuf. Call setjmp and handle each of the
- possible exceptions if it returns one. */
+/* Add GNU_STMT to the current statement group. */
- if (! type_annotate_only && Present (Exception_Handlers (gnat_node)))
- {
- tree gnu_jmpsave_decl = 0;
- tree gnu_jmpbuf_decl = 0;
- tree gnu_cleanup_call = 0;
- tree gnu_cleanup_decl;
+void
+add_stmt (tree gnu_stmt)
+{
+ append_to_statement_list (gnu_stmt, ¤t_stmt_group->stmt_list);
- pushlevel (0);
- expand_start_bindings (1);
+ /* If we're at top level, show everything in here is in use in case
+ any of it is shared by a subprogram. */
+ if (global_bindings_p ())
+ walk_tree (&gnu_stmt, mark_visited, NULL, NULL);
- if (! Zero_Cost_Handling (gnat_node))
- {
- gnu_jmpsave_decl
- = create_var_decl (get_identifier ("JMPBUF_SAVE"), NULL_TREE,
- jmpbuf_ptr_type,
- build_call_0_expr (get_jmpbuf_decl),
- 0, 0, 0, 0, 0);
-
- gnu_jmpbuf_decl = create_var_decl (get_identifier ("JMP_BUF"),
- NULL_TREE, jmpbuf_type,
- NULL_TREE, 0, 0, 0, 0,
- 0);
- TREE_VALUE (gnu_block_stack) = gnu_jmpbuf_decl;
- }
+}
- /* See if we are to call a function when exiting this block. */
- if (Present (At_End_Proc (gnat_node)))
- {
- gnu_cleanup_call
- = build_call_0_expr (gnat_to_gnu (At_End_Proc (gnat_node)));
+/* Similar, but set the location of GNU_STMT to that of GNAT_NODE. */
- gnu_cleanup_decl
- = create_var_decl (get_identifier ("CLEANUP"), NULL_TREE,
- integer_type_node, NULL_TREE, 0, 0, 0, 0,
- 0);
+void
+add_stmt_with_node (tree gnu_stmt, Node_Id gnat_node)
+{
+ if (Present (gnat_node))
+ annotate_with_node (gnu_stmt, gnat_node);
+ add_stmt (gnu_stmt);
+}
- expand_decl_cleanup (gnu_cleanup_decl, gnu_cleanup_call);
- }
+/* Add a declaration statement for GNU_DECL to the current statement group.
+ Get SLOC from Entity_Id. */
- if (! Zero_Cost_Handling (gnat_node))
- {
- /* When we exit this block, restore the saved value. */
- expand_decl_cleanup (gnu_jmpsave_decl,
- build_call_1_expr (set_jmpbuf_decl,
- gnu_jmpsave_decl));
-
- /* Call setjmp and handle exceptions if it returns one. */
- set_lineno (gnat_node, 1);
- expand_start_cond
- (build_call_1_expr (setjmp_decl,
- build_unary_op (ADDR_EXPR, NULL_TREE,
- gnu_jmpbuf_decl)),
- 0);
-
- /* Restore our incoming longjmp value before we do anything. */
- expand_expr_stmt (build_call_1_expr (set_jmpbuf_decl,
- gnu_jmpsave_decl));
-
- pushlevel (0);
- expand_start_bindings (0);
-
- gnu_except_ptr_stack
- = tree_cons (NULL_TREE,
- create_var_decl
- (get_identifier ("EXCEPT_PTR"), NULL_TREE,
- build_pointer_type (except_type_node),
- build_call_0_expr (get_excptr_decl),
- 0, 0, 0, 0, 0),
- gnu_except_ptr_stack);
-
- /* Generate code for each exception handler. The code at
- N_Exception_Handler below does the real work. Note that
- we ignore the dummy exception handler for the identifier
- case, this is used only by the front end */
- if (Present (Exception_Handlers (gnat_node)))
- for (gnat_temp
- = First_Non_Pragma (Exception_Handlers (gnat_node));
- Present (gnat_temp);
- gnat_temp = Next_Non_Pragma (gnat_temp))
- gnat_to_code (gnat_temp);
-
- /* If none of the exception handlers did anything, re-raise
- but do not defer abortion. */
- set_lineno (gnat_node, 1);
- expand_expr_stmt
- (build_call_1_expr (raise_nodefer_decl,
- TREE_VALUE (gnu_except_ptr_stack)));
-
- gnu_except_ptr_stack = TREE_CHAIN (gnu_except_ptr_stack);
- expand_end_bindings (getdecls (), kept_level_p (), 0);
- poplevel (kept_level_p (), 1, 0);
-
- /* End the "if" on setjmp. Note that we have arranged things so
- control never returns here. */
- expand_end_cond ();
-
- /* This is now immediately before the body proper. Set
- our jmp_buf as the current buffer. */
- expand_expr_stmt
- (build_call_1_expr (set_jmpbuf_decl,
- build_unary_op (ADDR_EXPR, NULL_TREE,
- gnu_jmpbuf_decl)));
- }
- }
+void
+add_decl_expr (tree gnu_decl, Entity_Id gnat_entity)
+{
+ tree gnu_stmt;
+
+ /* If this is a variable that Gigi is to ignore, we may have been given
+ an ERROR_MARK. So test for it. We also might have been given a
+ reference for a renaming. So only do something for a decl. Also
+ ignore a TYPE_DECL for an UNCONSTRAINED_ARRAY_TYPE. */
+ if (!DECL_P (gnu_decl)
+ || (TREE_CODE (gnu_decl) == TYPE_DECL
+ && TREE_CODE (TREE_TYPE (gnu_decl)) == UNCONSTRAINED_ARRAY_TYPE))
+ return;
- /* If there are no exception handlers, we must not have an at end
- cleanup identifier, since the cleanup identifier should always
- generate a corresponding exception handler. */
- else if (! type_annotate_only && Present (At_End_Proc (gnat_node)))
- gigi_abort (335);
-
- /* Generate code and declarations for the prefix of this block,
- if any. */
- if (Present (First_Real_Statement (gnat_node)))
- process_decls (Statements (gnat_node), Empty,
- First_Real_Statement (gnat_node), 1, 1);
-
- /* Generate code for each statement in the block. */
- for (gnat_temp = (Present (First_Real_Statement (gnat_node))
- ? First_Real_Statement (gnat_node)
- : First (Statements (gnat_node)));
- Present (gnat_temp); gnat_temp = Next (gnat_temp))
- gnat_to_code (gnat_temp);
-
- /* For zero-cost exceptions, exit the block and then compile
- the handlers. */
- if (! type_annotate_only && Zero_Cost_Handling (gnat_node)
- && Present (Exception_Handlers (gnat_node)))
+ /* If we are global, we don't want to actually output the DECL_EXPR for
+ this decl since we already have evaluated the expressions in the
+ sizes and positions as globals and doing it again would be wrong.
+ But we do have to mark everything as used. */
+ gnu_stmt = build1 (DECL_EXPR, void_type_node, gnu_decl);
+ if (!global_bindings_p ())
+ add_stmt_with_node (gnu_stmt, gnat_entity);
+ else
+ {
+ walk_tree (&gnu_stmt, mark_visited, NULL, NULL);
+ if (TREE_CODE (gnu_decl) == VAR_DECL
+ || TREE_CODE (gnu_decl) == CONST_DECL)
{
- expand_exit_something ();
- gnu_except_ptr_stack
- = tree_cons (NULL_TREE, error_mark_node, gnu_except_ptr_stack);
-
- for (gnat_temp = First_Non_Pragma (Exception_Handlers (gnat_node));
- Present (gnat_temp);
- gnat_temp = Next_Non_Pragma (gnat_temp))
- gnat_to_code (gnat_temp);
-
- gnu_except_ptr_stack = TREE_CHAIN (gnu_except_ptr_stack);
+ walk_tree (&DECL_SIZE (gnu_decl), mark_visited, NULL, NULL);
+ walk_tree (&DECL_SIZE_UNIT (gnu_decl), mark_visited, NULL, NULL);
+ walk_tree (&DECL_INITIAL (gnu_decl), mark_visited, NULL, NULL);
}
+ }
- /* If we have handlers, close the block we made. */
- if (! type_annotate_only && Present (Exception_Handlers (gnat_node)))
+ /* If this is a DECL_EXPR for a variable with DECL_INITIAl set,
+ there are two cases we need to handle here. */
+ if (TREE_CODE (gnu_decl) == VAR_DECL && DECL_INITIAL (gnu_decl))
+ {
+ tree gnu_init = DECL_INITIAL (gnu_decl);
+ tree gnu_lhs = NULL_TREE;
+
+ /* If this is a DECL_EXPR for a variable with DECL_INITIAL set
+ and decl has a padded type, convert it to the unpadded type so the
+ assignment is done properly. */
+ if (TREE_CODE (TREE_TYPE (gnu_decl)) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (TREE_TYPE (gnu_decl)))
+ gnu_lhs
+ = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_decl))), gnu_decl);
+
+ /* Otherwise, if this is going into memory and the initializer isn't
+ valid for the assembler and loader. Gimplification could do this,
+ but would be run too late if -fno-unit-at-a-time. */
+ else if (TREE_STATIC (gnu_decl)
+ && !initializer_constant_valid_p (gnu_init,
+ TREE_TYPE (gnu_decl)))
+ gnu_lhs = gnu_decl;
+
+ if (gnu_lhs)
{
- expand_end_bindings (getdecls (), kept_level_p (), 0);
- poplevel (kept_level_p (), 1, 0);
+ tree gnu_assign_stmt
+ = build_binary_op (MODIFY_EXPR, NULL_TREE,
+ gnu_lhs, DECL_INITIAL (gnu_decl));
+
+ DECL_INITIAL (gnu_decl) = 0;
+ TREE_READONLY (gnu_decl) = 0;
+ annotate_with_locus (gnu_assign_stmt,
+ DECL_SOURCE_LOCATION (gnu_decl));
+ add_stmt (gnu_assign_stmt);
}
+ }
+}
- break;
-
- case N_Exception_Handler:
- if (! Zero_Cost_Handling (gnat_node))
- {
- /* Unless this is "Others" or the special "Non-Ada" exception
- for Ada, make an "if" statement to select the proper
- exceptions. For "Others", exclude exceptions where
- Handled_By_Others is nonzero unless the All_Others flag is set.
- For "Non-ada", accept an exception if "Lang" is 'V'. */
- tree gnu_choice = integer_zero_node;
-
- for (gnat_temp = First (Exception_Choices (gnat_node));
- gnat_temp; gnat_temp = Next (gnat_temp))
- {
- tree this_choice;
-
- if (Nkind (gnat_temp) == N_Others_Choice)
- {
- if (All_Others (gnat_temp))
- this_choice = integer_one_node;
- else
- this_choice
- = build_binary_op
- (EQ_EXPR, integer_type_node,
- convert
- (integer_type_node,
- build_component_ref
- (build_unary_op
- (INDIRECT_REF, NULL_TREE,
- TREE_VALUE (gnu_except_ptr_stack)),
- get_identifier ("not_handled_by_others"), NULL_TREE)),
- integer_zero_node);
- }
-
- else if (Nkind (gnat_temp) == N_Identifier
- || Nkind (gnat_temp) == N_Expanded_Name)
- {
- /* ??? Note that we have to use gnat_to_gnu_entity here
- since the type of the exception will be wrong in the
- VMS case and that's exactly what this test is for. */
- gnu_expr
- = gnat_to_gnu_entity (Entity (gnat_temp), NULL_TREE, 0);
-
- /* If this was a VMS exception, check import_code
- against the value of the exception. */
- if (TREE_CODE (TREE_TYPE (gnu_expr)) == INTEGER_TYPE)
- this_choice
- = build_binary_op
- (EQ_EXPR, integer_type_node,
- build_component_ref
- (build_unary_op
- (INDIRECT_REF, NULL_TREE,
- TREE_VALUE (gnu_except_ptr_stack)),
- get_identifier ("import_code"), NULL_TREE),
- gnu_expr);
- else
- this_choice
- = build_binary_op
- (EQ_EXPR, integer_type_node,
- TREE_VALUE (gnu_except_ptr_stack),
- convert
- (TREE_TYPE (TREE_VALUE (gnu_except_ptr_stack)),
- build_unary_op (ADDR_EXPR, NULL_TREE, gnu_expr)));
-
- /* If this is the distinguished exception "Non_Ada_Error"
- (and we are in VMS mode), also allow a non-Ada
- exception (a VMS condition) to match. */
- if (Is_Non_Ada_Error (Entity (gnat_temp)))
- {
- tree gnu_comp
- = build_component_ref
- (build_unary_op
- (INDIRECT_REF, NULL_TREE,
- TREE_VALUE (gnu_except_ptr_stack)),
- get_identifier ("lang"), NULL_TREE);
-
- this_choice
- = build_binary_op
- (TRUTH_ORIF_EXPR, integer_type_node,
- build_binary_op
- (EQ_EXPR, integer_type_node, gnu_comp,
- convert (TREE_TYPE (gnu_comp),
- build_int_2 ('V', 0))),
- this_choice);
- }
- }
- else
- gigi_abort (318);
-
- gnu_choice = build_binary_op (TRUTH_ORIF_EXPR, integer_type_node,
- gnu_choice, this_choice);
- }
+/* Utility function to mark nodes with TREE_VISITED and types as having their
+ sized gimplified. Called from walk_tree. We use this to indicate all
+ variable sizes and positions in global types may not be shared by any
+ subprogram. */
- set_lineno (gnat_node, 1);
+static tree
+mark_visited (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
+{
+ if (TREE_VISITED (*tp))
+ *walk_subtrees = 0;
- expand_start_cond (gnu_choice, 0);
- }
+ /* Don't mark a dummy type as visited because we want to mark its sizes
+ and fields once it's filled in. */
+ else if (!TYPE_IS_DUMMY_P (*tp))
+ TREE_VISITED (*tp) = 1;
- for (gnat_temp = First (Statements (gnat_node));
- gnat_temp; gnat_temp = Next (gnat_temp))
- gnat_to_code (gnat_temp);
+ if (TYPE_P (*tp))
+ TYPE_SIZES_GIMPLIFIED (*tp) = 1;
- /* At the end of the handler, exit the block. We made this block
- in N_Handled_Sequence_Of_Statements. */
- expand_exit_something ();
+ return NULL_TREE;
+}
- if (! Zero_Cost_Handling (gnat_node))
- expand_end_cond ();
+/* Likewise, but to mark as unvisited. */
- break;
+static tree
+mark_unvisited (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
+ void *data ATTRIBUTE_UNUSED)
+{
+ TREE_VISITED (*tp) = 0;
- /*******************************/
- /* Chapter 12: Generic Units: */
- /*******************************/
+ return NULL_TREE;
+}
- case N_Generic_Function_Renaming_Declaration:
- case N_Generic_Package_Renaming_Declaration:
- case N_Generic_Procedure_Renaming_Declaration:
- case N_Generic_Package_Declaration:
- case N_Generic_Subprogram_Declaration:
- case N_Package_Instantiation:
- case N_Procedure_Instantiation:
- case N_Function_Instantiation:
- /* These nodes can appear on a declaration list but there is nothing to
- to be done with them. */
- break;
+/* Add GNU_CLEANUP, a cleanup action, to the current code group. */
+static void
+add_cleanup (tree gnu_cleanup)
+{
+ append_to_statement_list (gnu_cleanup, ¤t_stmt_group->cleanups);
+}
- /***************************************************/
- /* Chapter 13: Representation Clauses and */
- /* Implementation-Dependent Features: */
- /***************************************************/
+/* Set the BLOCK node corresponding to the current code group to GNU_BLOCK. */
- case N_Attribute_Definition_Clause:
+void
+set_block_for_group (tree gnu_block)
+{
+ gcc_assert (!current_stmt_group->block);
+ current_stmt_group->block = gnu_block;
+}
- /* The only one we need deal with is for 'Address. For the others, SEM
- puts the information elsewhere. We need only deal with 'Address
- if the object has a Freeze_Node (which it never will currently). */
- if (Get_Attribute_Id (Chars (gnat_node)) != Attr_Address
- || No (Freeze_Node (Entity (Name (gnat_node)))))
- break;
+/* Return code corresponding to the current code group. It is normally
+ a STATEMENT_LIST, but may also be a BIND_EXPR or TRY_FINALLY_EXPR if
+ BLOCK or cleanups were set. */
- /* Get the value to use as the address and save it as the
- equivalent for GNAT_TEMP. When the object is frozen,
- gnat_to_gnu_entity will do the right thing. */
- gnu_expr = gnat_to_gnu (Expression (gnat_node));
- save_gnu_tree (Entity (Name (gnat_node)), gnu_expr, 1);
- break;
+static tree
+end_stmt_group ()
+{
+ struct stmt_group *group = current_stmt_group;
+ tree gnu_retval = group->stmt_list;
+
+ /* If this is a null list, allocate a new STATEMENT_LIST. Then, if there
+ are cleanups, make a TRY_FINALLY_EXPR. Last, if there is a BLOCK,
+ make a BIND_EXPR. Note that we nest in that because the cleanup may
+ reference variables in the block. */
+ if (gnu_retval == NULL_TREE)
+ gnu_retval = alloc_stmt_list ();
+
+ if (group->cleanups)
+ gnu_retval = build2 (TRY_FINALLY_EXPR, void_type_node, gnu_retval,
+ group->cleanups);
+
+ if (current_stmt_group->block)
+ gnu_retval = build3 (BIND_EXPR, void_type_node, BLOCK_VARS (group->block),
+ gnu_retval, group->block);
+
+ /* Remove this group from the stack and add it to the free list. */
+ current_stmt_group = group->previous;
+ group->previous = stmt_group_free_list;
+ stmt_group_free_list = group;
+
+ return gnu_retval;
+}
- case N_Enumeration_Representation_Clause:
- case N_Record_Representation_Clause:
- case N_At_Clause:
- /* We do nothing with these. SEM puts the information elsewhere. */
- break;
+/* Add a list of statements from GNAT_LIST, a possibly-empty list of
+ statements.*/
- case N_Code_Statement:
- if (! type_annotate_only)
- {
- tree gnu_template = gnat_to_gnu (Asm_Template (gnat_node));
- tree gnu_input_list = 0, gnu_output_list = 0, gnu_orig_out_list = 0;
- tree gnu_clobber_list = 0;
- char *clobber;
+static void
+add_stmt_list (List_Id gnat_list)
+{
+ Node_Id gnat_node;
- /* First process inputs, then outputs, then clobbers. */
- Setup_Asm_Inputs (gnat_node);
- while (Present (gnat_temp = Asm_Input_Value ()))
- {
- tree gnu_value = gnat_to_gnu (gnat_temp);
- tree gnu_constr = build_tree_list (NULL_TREE, gnat_to_gnu
- (Asm_Input_Constraint ()));
+ if (Present (gnat_list))
+ for (gnat_node = First (gnat_list); Present (gnat_node);
+ gnat_node = Next (gnat_node))
+ add_stmt (gnat_to_gnu (gnat_node));
+}
- gnu_input_list
- = tree_cons (gnu_constr, gnu_value, gnu_input_list);
- Next_Asm_Input ();
- }
+/* Build a tree from GNAT_LIST, a possibly-empty list of statements.
+ If BINDING_P is true, push and pop a binding level around the list. */
- Setup_Asm_Outputs (gnat_node);
- while (Present (gnat_temp = Asm_Output_Variable ()))
- {
- tree gnu_value = gnat_to_gnu (gnat_temp);
- tree gnu_constr = build_tree_list (NULL_TREE, gnat_to_gnu
- (Asm_Output_Constraint ()));
+static tree
+build_stmt_group (List_Id gnat_list, bool binding_p)
+{
+ start_stmt_group ();
+ if (binding_p)
+ gnat_pushlevel ();
- gnu_orig_out_list
- = tree_cons (gnu_constr, gnu_value, gnu_orig_out_list);
- gnu_output_list
- = tree_cons (gnu_constr, gnu_value, gnu_output_list);
- Next_Asm_Output ();
- }
+ add_stmt_list (gnat_list);
+ if (binding_p)
+ gnat_poplevel ();
- Clobber_Setup (gnat_node);
- while ((clobber = Clobber_Get_Next ()) != 0)
- gnu_clobber_list
- = tree_cons (NULL_TREE,
- build_string (strlen (clobber) + 1, clobber),
- gnu_clobber_list);
+ return end_stmt_group ();
+}
+\f
+/* Push and pop routines for stacks. We keep a free list around so we
+ don't waste tree nodes. */
- expand_asm_operands (gnu_template, nreverse (gnu_output_list),
- nreverse (gnu_input_list), gnu_clobber_list,
- Is_Asm_Volatile (gnat_node),
- input_filename, lineno);
+static void
+push_stack (tree *gnu_stack_ptr, tree gnu_purpose, tree gnu_value)
+{
+ tree gnu_node = gnu_stack_free_list;
- /* Copy all the intermediate outputs into the specified outputs. */
- for (; gnu_output_list;
- (gnu_output_list = TREE_CHAIN (gnu_output_list),
- gnu_orig_out_list = TREE_CHAIN (gnu_orig_out_list)))
- if (TREE_VALUE (gnu_orig_out_list) != TREE_VALUE (gnu_output_list))
- {
- expand_expr_stmt
- (build_binary_op (MODIFY_EXPR, NULL_TREE,
- TREE_VALUE (gnu_orig_out_list),
- TREE_VALUE (gnu_output_list)));
- free_temp_slots ();
- }
- }
- break;
+ if (gnu_node)
+ {
+ gnu_stack_free_list = TREE_CHAIN (gnu_node);
+ TREE_CHAIN (gnu_node) = *gnu_stack_ptr;
+ TREE_PURPOSE (gnu_node) = gnu_purpose;
+ TREE_VALUE (gnu_node) = gnu_value;
+ }
+ else
+ gnu_node = tree_cons (gnu_purpose, gnu_value, *gnu_stack_ptr);
- /***************************************************/
- /* Added Nodes */
- /***************************************************/
+ *gnu_stack_ptr = gnu_node;
+}
- case N_Freeze_Entity:
- process_freeze_entity (gnat_node);
- process_decls (Actions (gnat_node), Empty, Empty, 1, 1);
- break;
+static void
+pop_stack (tree *gnu_stack_ptr)
+{
+ tree gnu_node = *gnu_stack_ptr;
- case N_Itype_Reference:
- if (! present_gnu_tree (Itype (gnat_node)))
- process_type (Itype (gnat_node));
- break;
+ *gnu_stack_ptr = TREE_CHAIN (gnu_node);
+ TREE_CHAIN (gnu_node) = gnu_stack_free_list;
+ gnu_stack_free_list = gnu_node;
+}
+\f
+/* GNU_STMT is a statement. We generate code for that statement. */
- case N_Free_Statement:
- if (! type_annotate_only)
- {
- tree gnu_ptr = gnat_to_gnu (Expression (gnat_node));
- tree gnu_obj_type;
- tree gnu_obj_size;
- int align;
+void
+gnat_expand_stmt (tree gnu_stmt)
+{
+#if 0
+ tree gnu_elmt, gnu_elmt_2;
+#endif
- /* If this is an unconstrained array, we know the object must
- have been allocated with the template in front of the object.
- So pass the template address, but get the total size. Do this
- by converting to a thin pointer. */
- if (TYPE_FAT_POINTER_P (TREE_TYPE (gnu_ptr)))
- gnu_ptr
- = convert (build_pointer_type
- (TYPE_OBJECT_RECORD_TYPE
- (TYPE_UNCONSTRAINED_ARRAY (TREE_TYPE (gnu_ptr)))),
- gnu_ptr);
+ switch (TREE_CODE (gnu_stmt))
+ {
+#if 0
+ case USE_STMT:
+ /* First write a volatile ASM_INPUT to prevent anything from being
+ moved. */
+ gnu_elmt = gen_rtx_ASM_INPUT (VOIDmode, "");
+ MEM_VOLATILE_P (gnu_elmt) = 1;
+ emit_insn (gnu_elmt);
+
+ gnu_elmt = expand_expr (TREE_OPERAND (gnu_stmt, 0), NULL_RTX, VOIDmode,
+ modifier);
+ emit_insn (gen_rtx_USE (VOIDmode, ));
+ return target;
+#endif
- gnu_obj_type = TREE_TYPE (TREE_TYPE (gnu_ptr));
- gnu_obj_size = TYPE_SIZE_UNIT (gnu_obj_type);
- align = TYPE_ALIGN (gnu_obj_type);
+ default:
+ gcc_unreachable ();
+ }
+}
+\f
+/* Generate GIMPLE in place for the expression at *EXPR_P. */
- if (TREE_CODE (gnu_obj_type) == RECORD_TYPE
- && TYPE_CONTAINS_TEMPLATE_P (gnu_obj_type))
- {
- tree gnu_char_ptr_type = build_pointer_type (char_type_node);
- tree gnu_pos = byte_position (TYPE_FIELDS (gnu_obj_type));
- tree gnu_byte_offset
- = convert (gnu_char_ptr_type,
- size_diffop (size_zero_node, gnu_pos));
+int
+gnat_gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p ATTRIBUTE_UNUSED)
+{
+ tree expr = *expr_p;
- gnu_ptr = convert (gnu_char_ptr_type, gnu_ptr);
- gnu_ptr = build_binary_op (MINUS_EXPR, gnu_char_ptr_type,
- gnu_ptr, gnu_byte_offset);
- }
+ if (IS_ADA_STMT (expr))
+ return gnat_gimplify_stmt (expr_p);
- set_lineno (gnat_node, 1);
- expand_expr_stmt
- (build_call_alloc_dealloc (gnu_ptr, gnu_obj_size, align,
- Procedure_To_Call (gnat_node),
- Storage_Pool (gnat_node)));
+ switch (TREE_CODE (expr))
+ {
+ case NULL_EXPR:
+ /* If this is for a scalar, just make a VAR_DECL for it. If for
+ an aggregate, get a null pointer of the appropriate type and
+ dereference it. */
+ if (AGGREGATE_TYPE_P (TREE_TYPE (expr)))
+ *expr_p = build1 (INDIRECT_REF, TREE_TYPE (expr),
+ convert (build_pointer_type (TREE_TYPE (expr)),
+ integer_zero_node));
+ else
+ {
+ *expr_p = create_tmp_var (TREE_TYPE (expr), NULL);
+ TREE_NO_WARNING (*expr_p) = 1;
}
- break;
-
- case N_Raise_Constraint_Error:
- case N_Raise_Program_Error:
- case N_Raise_Storage_Error:
- if (type_annotate_only)
- break;
+ append_to_statement_list (TREE_OPERAND (expr, 0), pre_p);
+ return GS_OK;
- gnu_result_type = get_unpadded_type (Etype (gnat_node));
- gnu_result
- = build_call_raise
- (Nkind (gnat_node) == N_Raise_Constraint_Error
- ? raise_constraint_error_decl
- : Nkind (gnat_node) == N_Raise_Program_Error
- ? raise_program_error_decl : raise_storage_error_decl);
+ case UNCONSTRAINED_ARRAY_REF:
+ /* We should only do this if we are just elaborating for side-effects,
+ but we can't know that yet. */
+ *expr_p = TREE_OPERAND (*expr_p, 0);
+ return GS_OK;
- /* If the type is VOID, this is a statement, so we need to
- generate the code for the call. Handle a Condition, if there
- is one. */
- if (TREE_CODE (gnu_result_type) == VOID_TYPE)
+ case ADDR_EXPR:
+ /* If we're taking the address of a constant CONSTRUCTOR, force it to
+ be put into static memory. We know it's going to be readonly given
+ the semantics we have and it's required to be static memory in
+ the case when the reference is in an elaboration procedure. */
+ if (TREE_CODE (TREE_OPERAND (expr, 0)) == CONSTRUCTOR
+ && TREE_CONSTANT (TREE_OPERAND (expr, 0)))
{
- set_lineno (gnat_node, 1);
+ tree new_var
+ = create_tmp_var (TREE_TYPE (TREE_OPERAND (expr, 0)), "C");
- if (Present (Condition (gnat_node)))
- expand_start_cond (gnat_to_gnu (Condition (gnat_node)), 0);
+ TREE_READONLY (new_var) = 1;
+ TREE_STATIC (new_var) = 1;
+ TREE_ADDRESSABLE (new_var) = 1;
+ DECL_INITIAL (new_var) = TREE_OPERAND (expr, 0);
- expand_expr_stmt (gnu_result);
- if (Present (Condition (gnat_node)))
- expand_end_cond ();
- gnu_result = error_mark_node;
+ TREE_OPERAND (expr, 0) = new_var;
+ return GS_ALL_DONE;
}
- else
- gnu_result = build1 (NULL_EXPR, gnu_result_type, gnu_result);
- break;
+ return GS_UNHANDLED;
- /* Nothing to do, since front end does all validation using the
- values that Gigi back-annotates. */
- case N_Validate_Unchecked_Conversion:
- break;
-
- case N_Raise_Statement:
- case N_Function_Specification:
- case N_Procedure_Specification:
- case N_Op_Concat:
- case N_Component_Association:
- case N_Task_Body:
- default:
- if (! type_annotate_only)
- gigi_abort (321);
- }
+ case COMPONENT_REF:
+ /* We have a kludge here. If the FIELD_DECL is from a fat pointer and is
+ from an early dummy type, replace it with the proper FIELD_DECL. */
+ if (TYPE_FAT_POINTER_P (TREE_TYPE (TREE_OPERAND (*expr_p, 0)))
+ && DECL_ORIGINAL_FIELD (TREE_OPERAND (*expr_p, 1)))
+ {
+ TREE_OPERAND (*expr_p, 1)
+ = DECL_ORIGINAL_FIELD (TREE_OPERAND (*expr_p, 1));
+ return GS_OK;
+ }
- /* If the result is a constant that overflows, raise constraint error. */
- if (TREE_CODE (gnu_result) == INTEGER_CST
- && TREE_CONSTANT_OVERFLOW (gnu_result))
- {
- post_error ("Constraint_Error will be raised at run-time?", gnat_node);
+ /* ... fall through ... */
- gnu_result
- = build1 (NULL_EXPR, gnu_result_type,
- build_call_raise (raise_constraint_error_decl));
+ default:
+ return GS_UNHANDLED;
}
+}
- /* If our result has side-effects and is of an unconstrained type,
- make a SAVE_EXPR so that we can be sure it will only be referenced
- once. Note we must do this before any conversions. */
- if (TREE_SIDE_EFFECTS (gnu_result)
- && (TREE_CODE (gnu_result_type) == UNCONSTRAINED_ARRAY_TYPE
- || (TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST
- && contains_placeholder_p (TYPE_SIZE (gnu_result_type)))))
- gnu_result = gnat_stabilize_reference (gnu_result, 0);
+/* Generate GIMPLE in place for the statement at *STMT_P. */
- /* Now convert the result to the proper type. If the type is void or if
- we have no result, return error_mark_node to show we have no result.
- If the type of the result is correct or if we have a label (which doesn't
- have any well-defined type), return our result. Also don't do the
- conversion if the "desired" type involves a PLACEHOLDER_EXPR in its size
- since those are the cases where the front end may have the type wrong due
- to "instantiating" the unconstrained record with discriminant values
- or if this is a FIELD_DECL. If this is the Name of an assignment
- statement or a parameter of a procedure call, return what we have since
- the RHS has to be converted to our type there in that case, unless
- GNU_RESULT_TYPE has a simpler size. Similarly, if the two types are
- record types with the same name, the expression type has integral mode,
- and GNU_RESULT_TYPE BLKmode, don't convert. This will be the case when
- we are converting from a packable type to its actual type and we need
- those conversions to be NOPs in order for assignments into these types to
- work properly if the inner object is a bitfield and hence can't have
- its address taken. Finally, don't convert integral types that are the
- operand of an unchecked conversion since we need to ignore those
- conversions (for 'Valid). Otherwise, convert the result to the proper
- type. */
+static enum gimplify_status
+gnat_gimplify_stmt (tree *stmt_p)
+{
+ tree stmt = *stmt_p;
- if (Present (Parent (gnat_node))
- && ((Nkind (Parent (gnat_node)) == N_Assignment_Statement
- && Name (Parent (gnat_node)) == gnat_node)
- || (Nkind (Parent (gnat_node)) == N_Procedure_Call_Statement
- && Name (Parent (gnat_node)) != gnat_node)
- || (Nkind (Parent (gnat_node)) == N_Unchecked_Type_Conversion
- && ! AGGREGATE_TYPE_P (gnu_result_type)
- && ! AGGREGATE_TYPE_P (TREE_TYPE (gnu_result)))
- || Nkind (Parent (gnat_node)) == N_Parameter_Association)
- && ! (TYPE_SIZE (gnu_result_type) != 0
- && TYPE_SIZE (TREE_TYPE (gnu_result)) != 0
- && (AGGREGATE_TYPE_P (gnu_result_type)
- == AGGREGATE_TYPE_P (TREE_TYPE (gnu_result)))
- && ((TREE_CODE (TYPE_SIZE (gnu_result_type)) == INTEGER_CST
- && (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_result)))
- != INTEGER_CST))
- || (TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST
- && (TREE_CODE (TYPE_SIZE (TREE_TYPE (gnu_result)))
- != INTEGER_CST)
- && ! (contains_placeholder_p (TYPE_SIZE (gnu_result_type)))
- && (contains_placeholder_p
- (TYPE_SIZE (TREE_TYPE (gnu_result))))))
- && ! (TREE_CODE (gnu_result_type) == RECORD_TYPE
- && TYPE_LEFT_JUSTIFIED_MODULAR_P (gnu_result_type))))
+ switch (TREE_CODE (stmt))
{
- /* In this case remove padding only if the inner object is of
- self-referential size: in that case it must be an object of
- unconstrained type with a default discriminant. In other cases,
- we want to avoid copying too much data. */
- if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
- && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result))
- && contains_placeholder_p (TYPE_SIZE
- (TREE_TYPE (TYPE_FIELDS
- (TREE_TYPE (gnu_result))))))
- gnu_result = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result))),
- gnu_result);
- }
+ case STMT_STMT:
+ *stmt_p = STMT_STMT_STMT (stmt);
+ return GS_OK;
- else if (TREE_CODE (gnu_result) == LABEL_DECL
- || TREE_CODE (gnu_result) == FIELD_DECL
- || TREE_CODE (gnu_result) == ERROR_MARK
- || (TYPE_SIZE (gnu_result_type) != 0
- && TREE_CODE (TYPE_SIZE (gnu_result_type)) != INTEGER_CST
- && TREE_CODE (gnu_result) != INDIRECT_REF
- && contains_placeholder_p (TYPE_SIZE (gnu_result_type)))
- || ((TYPE_NAME (gnu_result_type)
- == TYPE_NAME (TREE_TYPE (gnu_result)))
- && TREE_CODE (gnu_result_type) == RECORD_TYPE
- && TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
- && TYPE_MODE (gnu_result_type) == BLKmode
- && (GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (gnu_result)))
- == MODE_INT)))
- {
- /* Remove any padding record, but do nothing more in this case. */
- if (TREE_CODE (TREE_TYPE (gnu_result)) == RECORD_TYPE
- && TYPE_IS_PADDING_P (TREE_TYPE (gnu_result)))
- gnu_result = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (gnu_result))),
- gnu_result);
- }
+ case USE_STMT:
+ *stmt_p = NULL_TREE;
+ return GS_ALL_DONE;
- else if (gnu_result == error_mark_node
- || gnu_result_type == void_type_node)
- gnu_result = error_mark_node;
- else if (gnu_result_type != TREE_TYPE (gnu_result))
- gnu_result = convert (gnu_result_type, gnu_result);
+ case LOOP_STMT:
+ {
+ tree gnu_start_label = create_artificial_label ();
+ tree gnu_end_label = LOOP_STMT_LABEL (stmt);
+
+ /* Set to emit the statements of the loop. */
+ *stmt_p = NULL_TREE;
+
+ /* We first emit the start label and then a conditional jump to
+ the end label if there's a top condition, then the body of the
+ loop, then a conditional branch to the end label, then the update,
+ if any, and finally a jump to the start label and the definition
+ of the end label. */
+ append_to_statement_list (build1 (LABEL_EXPR, void_type_node,
+ gnu_start_label),
+ stmt_p);
+
+ if (LOOP_STMT_TOP_COND (stmt))
+ append_to_statement_list (build3 (COND_EXPR, void_type_node,
+ LOOP_STMT_TOP_COND (stmt),
+ alloc_stmt_list (),
+ build1 (GOTO_EXPR,
+ void_type_node,
+ gnu_end_label)),
+ stmt_p);
+
+ append_to_statement_list (LOOP_STMT_BODY (stmt), stmt_p);
+
+ if (LOOP_STMT_BOT_COND (stmt))
+ append_to_statement_list (build3 (COND_EXPR, void_type_node,
+ LOOP_STMT_BOT_COND (stmt),
+ alloc_stmt_list (),
+ build1 (GOTO_EXPR,
+ void_type_node,
+ gnu_end_label)),
+ stmt_p);
+
+ if (LOOP_STMT_UPDATE (stmt))
+ append_to_statement_list (LOOP_STMT_UPDATE (stmt), stmt_p);
+
+ append_to_statement_list (build1 (GOTO_EXPR, void_type_node,
+ gnu_start_label),
+ stmt_p);
+ append_to_statement_list (build1 (LABEL_EXPR, void_type_node,
+ gnu_end_label),
+ stmt_p);
+ return GS_OK;
+ }
- /* We don't need any NOP_EXPR or NON_LVALUE_EXPR on GNU_RESULT. */
- while ((TREE_CODE (gnu_result) == NOP_EXPR
- || TREE_CODE (gnu_result) == NON_LVALUE_EXPR)
- && TREE_TYPE (TREE_OPERAND (gnu_result, 0)) == TREE_TYPE (gnu_result))
- gnu_result = TREE_OPERAND (gnu_result, 0);
+ case EXIT_STMT:
+ /* Build a statement to jump to the corresponding end label, then
+ see if it needs to be conditional. */
+ *stmt_p = build1 (GOTO_EXPR, void_type_node, EXIT_STMT_LABEL (stmt));
+ if (EXIT_STMT_COND (stmt))
+ *stmt_p = build3 (COND_EXPR, void_type_node,
+ EXIT_STMT_COND (stmt), *stmt_p, alloc_stmt_list ());
+ return GS_OK;
- return gnu_result;
+ default:
+ gcc_unreachable ();
+ }
}
\f
/* Force references to each of the entities in packages GNAT_NODE with's
packages are elaborated on demand, and if clients have different usage
patterns, the normal case, then the order and selection of entities
will differ. In most cases however, it seems that linkers do not know
- how to eliminate duplicate debugging information, even if it is
+ how to eliminate duplicate debugging information, even if it is
identical, so the use of this routine would increase the total amount
of debugging information in the final executable.
information for types in withed units, for ASIS use */
static void
-elaborate_all_entities (gnat_node)
- Node_Id gnat_node;
+elaborate_all_entities (Node_Id gnat_node)
{
Entity_Id gnat_with_clause, gnat_entity;
- save_gnu_tree (gnat_node, integer_zero_node, 1);
+ /* Process each unit only once. As we trace the context of all relevant
+ units transitively, including generic bodies, we may encounter the
+ same generic unit repeatedly */
+
+ if (!present_gnu_tree (gnat_node))
+ save_gnu_tree (gnat_node, integer_zero_node, true);
/* Save entities in all context units. A body may have an implicit_with
on its own spec, if the context includes a child unit, so don't save
Present (gnat_with_clause);
gnat_with_clause = Next (gnat_with_clause))
if (Nkind (gnat_with_clause) == N_With_Clause
- && ! present_gnu_tree (Library_Unit (gnat_with_clause))
+ && !present_gnu_tree (Library_Unit (gnat_with_clause))
&& Library_Unit (gnat_with_clause) != Library_Unit (Cunit (Main_Unit)))
{
elaborate_all_entities (Library_Unit (gnat_with_clause));
if (Ekind (Entity (Name (gnat_with_clause))) == E_Package)
- for (gnat_entity = First_Entity (Entity (Name (gnat_with_clause)));
- Present (gnat_entity);
- gnat_entity = Next_Entity (gnat_entity))
- if (Is_Public (gnat_entity)
- && Convention (gnat_entity) != Convention_Intrinsic
- && Ekind (gnat_entity) != E_Package
- && Ekind (gnat_entity) != E_Package_Body
- && Ekind (gnat_entity) != E_Operator
- && ! (IN (Ekind (gnat_entity), Type_Kind)
- && ! Is_Frozen (gnat_entity))
- && ! ((Ekind (gnat_entity) == E_Procedure
- || Ekind (gnat_entity) == E_Function)
- && Is_Intrinsic_Subprogram (gnat_entity))
- && ! IN (Ekind (gnat_entity), Named_Kind)
- && ! IN (Ekind (gnat_entity), Generic_Unit_Kind))
- gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0);
+ {
+ for (gnat_entity = First_Entity (Entity (Name (gnat_with_clause)));
+ Present (gnat_entity);
+ gnat_entity = Next_Entity (gnat_entity))
+ if (Is_Public (gnat_entity)
+ && Convention (gnat_entity) != Convention_Intrinsic
+ && Ekind (gnat_entity) != E_Package
+ && Ekind (gnat_entity) != E_Package_Body
+ && Ekind (gnat_entity) != E_Operator
+ && !(IN (Ekind (gnat_entity), Type_Kind)
+ && !Is_Frozen (gnat_entity))
+ && !((Ekind (gnat_entity) == E_Procedure
+ || Ekind (gnat_entity) == E_Function)
+ && Is_Intrinsic_Subprogram (gnat_entity))
+ && !IN (Ekind (gnat_entity), Named_Kind)
+ && !IN (Ekind (gnat_entity), Generic_Unit_Kind))
+ gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0);
+ }
+ else if (Ekind (Entity (Name (gnat_with_clause))) == E_Generic_Package)
+ {
+ Node_Id gnat_body
+ = Corresponding_Body (Unit (Library_Unit (gnat_with_clause)));
+
+ /* Retrieve compilation unit node of generic body. */
+ while (Present (gnat_body)
+ && Nkind (gnat_body) != N_Compilation_Unit)
+ gnat_body = Parent (gnat_body);
+
+ /* If body is available, elaborate its context. */
+ if (Present (gnat_body))
+ elaborate_all_entities (gnat_body);
+ }
}
if (Nkind (Unit (gnat_node)) == N_Package_Body && type_annotate_only)
/* Do the processing of N_Freeze_Entity, GNAT_NODE. */
static void
-process_freeze_entity (gnat_node)
- Node_Id gnat_node;
+process_freeze_entity (Node_Id gnat_node)
{
Entity_Id gnat_entity = Entity (gnat_node);
tree gnu_old;
&& Present (Equivalent_Type (gnat_entity))))
return;
+ /* Don't do anything for subprograms that may have been elaborated before
+ their freeze nodes. This can happen, for example because of an inner call
+ in an instance body. */
+ if (gnu_old
+ && TREE_CODE (gnu_old) == FUNCTION_DECL
+ && (Ekind (gnat_entity) == E_Function
+ || Ekind (gnat_entity) == E_Procedure))
+ return;
+
/* If we have a non-dummy type old tree, we have nothing to do. Unless
this is the public view of a private type whose full view was not
delayed, this node was never delayed as it should have been.
Also allow this to happen for concurrent types since we may have
frozen both the Corresponding_Record_Type and this type. */
- if (gnu_old != 0
- && ! (TREE_CODE (gnu_old) == TYPE_DECL
- && TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old))))
+ if (gnu_old
+ && !(TREE_CODE (gnu_old) == TYPE_DECL
+ && TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old))))
{
- if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
- && Present (Full_View (gnat_entity))
- && No (Freeze_Node (Full_View (gnat_entity))))
- return;
- else if (Is_Concurrent_Type (gnat_entity))
- return;
- else
- gigi_abort (320);
+ gcc_assert ((IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
+ && Present (Full_View (gnat_entity))
+ && No (Freeze_Node (Full_View (gnat_entity))))
+ || Is_Concurrent_Type (gnat_entity));
+ return;
}
/* Reset the saved tree, if any, and elaborate the object or type for real.
If there is a full declaration, elaborate it and copy the type to
GNAT_ENTITY. Likewise if this is the record subtype corresponding to
a class wide type or subtype. */
- if (gnu_old != 0)
+ if (gnu_old)
{
- save_gnu_tree (gnat_entity, NULL_TREE, 0);
+ save_gnu_tree (gnat_entity, NULL_TREE, false);
if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
&& Present (Full_View (gnat_entity))
&& present_gnu_tree (Full_View (gnat_entity)))
- save_gnu_tree (Full_View (gnat_entity), NULL_TREE, 0);
+ save_gnu_tree (Full_View (gnat_entity), NULL_TREE, false);
if (Present (Class_Wide_Type (gnat_entity))
&& Class_Wide_Type (gnat_entity) != gnat_entity)
- save_gnu_tree (Class_Wide_Type (gnat_entity), NULL_TREE, 0);
+ save_gnu_tree (Class_Wide_Type (gnat_entity), NULL_TREE, false);
}
if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
/* The above call may have defined this entity (the simplest example
of this is when we have a private enumeral type since the bounds
will have the public view. */
- if (! present_gnu_tree (gnat_entity))
- save_gnu_tree (gnat_entity, gnu_new, 0);
+ if (!present_gnu_tree (gnat_entity))
+ save_gnu_tree (gnat_entity, gnu_new, false);
if (Present (Class_Wide_Type (gnat_entity))
&& Class_Wide_Type (gnat_entity) != gnat_entity)
- save_gnu_tree (Class_Wide_Type (gnat_entity), gnu_new, 0);
+ save_gnu_tree (Class_Wide_Type (gnat_entity), gnu_new, false);
}
else
gnu_new = gnat_to_gnu_entity (gnat_entity, gnu_init, 1);
/* If we've made any pointers to the old version of this type, we
- have to update them. Also copy the name of the old object to
- the new one. */
-
- if (gnu_old != 0)
- {
- DECL_NAME (gnu_new) = DECL_NAME (gnu_old);
- update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old)),
- TREE_TYPE (gnu_new));
- }
+ have to update them. */
+ if (gnu_old)
+ update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old)),
+ TREE_TYPE (gnu_new));
}
\f
/* Process the list of inlined subprograms of GNAT_NODE, which is an
N_Compilation_Unit. */
static void
-process_inlined_subprograms (gnat_node)
- Node_Id gnat_node;
+process_inlined_subprograms (Node_Id gnat_node)
{
Entity_Id gnat_entity;
Node_Id gnat_body;
/* If we can inline, generate RTL for all the inlined subprograms.
Define the entity first so we set DECL_EXTERNAL. */
- if (optimize > 0 && ! flag_no_inline)
+ if (optimize > 0 && !flag_really_no_inline)
for (gnat_entity = First_Inlined_Subprogram (gnat_node);
Present (gnat_entity);
gnat_entity = Next_Inlined_Subprogram (gnat_entity))
if (Present (gnat_body))
{
gnat_to_gnu_entity (gnat_entity, NULL_TREE, 0);
- gnat_to_code (gnat_body);
+ add_stmt (gnat_to_gnu (gnat_body));
}
}
}
correspond to the public and private parts of a package. */
static void
-process_decls (gnat_decls, gnat_decls2, gnat_end_list, pass1p, pass2p)
- List_Id gnat_decls, gnat_decls2;
- Node_Id gnat_end_list;
- int pass1p, pass2p;
+process_decls (List_Id gnat_decls, List_Id gnat_decls2,
+ Node_Id gnat_end_list, bool pass1p, bool pass2p)
{
List_Id gnat_decl_array[2];
Node_Id gnat_decl;
for (gnat_decl = First (gnat_decl_array[i]);
gnat_decl != gnat_end_list; gnat_decl = Next (gnat_decl))
{
- set_lineno (gnat_decl, 0);
-
/* For package specs, we recurse inside the declarations,
thus taking the two pass approach inside the boundary. */
if (Nkind (gnat_decl) == N_Package_Declaration
== N_Package_Specification)))
process_decls (Visible_Declarations (Specification (gnat_decl)),
Private_Declarations (Specification (gnat_decl)),
- Empty, 1, 0);
+ Empty, true, false);
/* Similarly for any declarations in the actions of a
freeze node. */
else if (Nkind (gnat_decl) == N_Freeze_Entity)
{
process_freeze_entity (gnat_decl);
- process_decls (Actions (gnat_decl), Empty, Empty, 1, 0);
+ process_decls (Actions (gnat_decl), Empty, Empty, true, false);
}
/* Package bodies with freeze nodes get their elaboration deferred
record_code_position
(Proper_Body (Unit (Library_Unit (gnat_decl))));
- /* We defer most subprogram bodies to the second pass.
- However, Init_Proc subprograms cannot be defered, but luckily
- don't need to be. */
- else if ((Nkind (gnat_decl) == N_Subprogram_Body
- && (Chars (Defining_Entity (gnat_decl))
- != Name_uInit_Proc)))
+ /* We defer most subprogram bodies to the second pass. */
+ else if (Nkind (gnat_decl) == N_Subprogram_Body)
{
if (Acts_As_Spec (gnat_decl))
{
Node_Id gnat_subprog_id =
Defining_Entity (Specification (gnat_decl));
- if (Ekind (gnat_subprog_id) != E_Subprogram_Body
+ if (Ekind (gnat_subprog_id) != E_Subprogram_Body
&& Ekind (gnat_subprog_id) != E_Generic_Procedure
&& Ekind (gnat_subprog_id) != E_Generic_Function)
gnat_to_gnu_entity (gnat_subprog_id, NULL_TREE, 1);
/* Concurrent stubs stand for the corresponding subprogram bodies,
which are deferred like other bodies. */
- else if (Nkind (gnat_decl) == N_Task_Body_Stub
- || Nkind (gnat_decl) == N_Protected_Body_Stub)
- ;
-
+ else if (Nkind (gnat_decl) == N_Task_Body_Stub
+ || Nkind (gnat_decl) == N_Protected_Body_Stub)
+ ;
else
- gnat_to_code (gnat_decl);
+ add_stmt (gnat_to_gnu (gnat_decl));
}
/* Here we elaborate everything we deferred above except for package bodies,
for (gnat_decl = First (gnat_decl_array[i]);
gnat_decl != gnat_end_list; gnat_decl = Next (gnat_decl))
{
- if ((Nkind (gnat_decl) == N_Subprogram_Body
- && (Chars (Defining_Entity (gnat_decl))
- != Name_uInit_Proc))
+ if (Nkind (gnat_decl) == N_Subprogram_Body
|| Nkind (gnat_decl) == N_Subprogram_Body_Stub
|| Nkind (gnat_decl) == N_Task_Body_Stub
|| Nkind (gnat_decl) == N_Protected_Body_Stub)
- gnat_to_code (gnat_decl);
+ add_stmt (gnat_to_gnu (gnat_decl));
else if (Nkind (gnat_decl) == N_Package_Declaration
&& (Nkind (Specification (gnat_decl)
== N_Package_Specification)))
process_decls (Visible_Declarations (Specification (gnat_decl)),
Private_Declarations (Specification (gnat_decl)),
- Empty, 0, 1);
+ Empty, false, true);
else if (Nkind (gnat_decl) == N_Freeze_Entity)
- process_decls (Actions (gnat_decl), Empty, Empty, 0, 1);
+ process_decls (Actions (gnat_decl), Empty, Empty, false, true);
}
}
\f
-/* Emits an access check. GNU_EXPR is the expression that needs to be
- checked against the NULL pointer. */
-
-static tree
-emit_access_check (gnu_expr)
- tree gnu_expr;
-{
- tree gnu_type = TREE_TYPE (gnu_expr);
-
- /* This only makes sense if GNU_TYPE is a pointer of some sort. */
- if (! POINTER_TYPE_P (gnu_type) && ! TYPE_FAT_POINTER_P (gnu_type))
- gigi_abort (322);
-
- /* Checked expressions must be evaluated only once. */
- gnu_expr = make_save_expr (gnu_expr);
-
- return emit_check (build_binary_op (EQ_EXPR, integer_type_node,
- gnu_expr,
- convert (TREE_TYPE (gnu_expr),
- integer_zero_node)),
- gnu_expr);
-}
-
-/* Emits a discriminant check. GNU_EXPR is the expression to be checked and
- GNAT_NODE a N_Selected_Component node. */
-
-static tree
-emit_discriminant_check (gnu_expr, gnat_node)
- tree gnu_expr;
- Node_Id gnat_node;
-{
- Entity_Id orig_comp
- = Original_Record_Component (Entity (Selector_Name (gnat_node)));
- Entity_Id gnat_discr_fct = Discriminant_Checking_Func (orig_comp);
- tree gnu_discr_fct;
- Entity_Id gnat_discr;
- tree gnu_actual_list = NULL_TREE;
- tree gnu_cond;
- Entity_Id gnat_pref_type;
- tree gnu_pref_type;
-
- if (Is_Tagged_Type (Scope (orig_comp)))
- gnat_pref_type = Scope (orig_comp);
- else
- gnat_pref_type = Etype (Prefix (gnat_node));
-
- if (! Present (gnat_discr_fct))
- return gnu_expr;
-
- gnu_discr_fct = gnat_to_gnu (gnat_discr_fct);
-
- /* Checked expressions must be evaluated only once. */
- gnu_expr = make_save_expr (gnu_expr);
-
- /* Create the list of the actual parameters as GCC expects it.
- This list is the list of the discriminant fields of the
- record expression to be discriminant checked. For documentation
- on what is the GCC format for this list see under the
- N_Function_Call case */
-
- while (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind)
- || IN (Ekind (gnat_pref_type), Access_Kind))
- {
- if (IN (Ekind (gnat_pref_type), Incomplete_Or_Private_Kind))
- gnat_pref_type = Underlying_Type (gnat_pref_type);
- else if (IN (Ekind (gnat_pref_type), Access_Kind))
- gnat_pref_type = Designated_Type (gnat_pref_type);
- }
-
- gnu_pref_type
- = TREE_TYPE (gnat_to_gnu_entity (gnat_pref_type, NULL_TREE, 0));
-
- for (gnat_discr = First_Discriminant (gnat_pref_type);
- Present (gnat_discr); gnat_discr = Next_Discriminant (gnat_discr))
- {
- Entity_Id gnat_real_discr
- = ((Present (Corresponding_Discriminant (gnat_discr))
- && Present (Parent_Subtype (gnat_pref_type)))
- ? Corresponding_Discriminant (gnat_discr) : gnat_discr);
- tree gnu_discr = gnat_to_gnu_entity (gnat_real_discr, NULL_TREE, 0);
-
- gnu_actual_list
- = chainon (gnu_actual_list,
- build_tree_list (NULL_TREE,
- build_component_ref
- (convert (gnu_pref_type, gnu_expr),
- NULL_TREE, gnu_discr)));
- }
-
- gnu_cond = build (CALL_EXPR,
- TREE_TYPE (TREE_TYPE (gnu_discr_fct)),
- build_unary_op (ADDR_EXPR, NULL_TREE, gnu_discr_fct),
- gnu_actual_list,
- NULL_TREE);
- TREE_SIDE_EFFECTS (gnu_cond) = 1;
-
- return
- build_unary_op
- (INDIRECT_REF, NULL_TREE,
- emit_check (gnu_cond,
- build_unary_op (ADDR_EXPR,
- build_reference_type (TREE_TYPE (gnu_expr)),
- gnu_expr)));
-}
-\f
/* Emit code for a range check. GNU_EXPR is the expression to be checked,
GNAT_RANGE_TYPE the gnat type or subtype containing the bounds against
which we have to check. */
static tree
-emit_range_check (gnu_expr, gnat_range_type)
- tree gnu_expr;
- Entity_Id gnat_range_type;
+emit_range_check (tree gnu_expr, Entity_Id gnat_range_type)
{
tree gnu_range_type = get_unpadded_type (gnat_range_type);
tree gnu_low = TYPE_MIN_VALUE (gnu_range_type);
return gnu_expr;
/* Checked expressions must be evaluated only once. */
- gnu_expr = make_save_expr (gnu_expr);
+ gnu_expr = protect_multiple_eval (gnu_expr);
/* There's no good type to use here, so we might as well use
integer_type_node. Note that the form of the check is
convert (gnu_compare_type, gnu_expr),
convert (gnu_compare_type,
gnu_high)))),
- gnu_expr);
+ gnu_expr, CE_Range_Check_Failed);
}
\f
/* Emit code for an index check. GNU_ARRAY_OBJECT is the array object
subprograms having unconstrained array formal parameters */
static tree
-emit_index_check (gnu_array_object, gnu_expr, gnu_low, gnu_high)
- tree gnu_array_object;
- tree gnu_expr;
- tree gnu_low;
- tree gnu_high;
+emit_index_check (tree gnu_array_object,
+ tree gnu_expr,
+ tree gnu_low,
+ tree gnu_high)
{
tree gnu_expr_check;
/* Checked expressions must be evaluated only once. */
- gnu_expr = make_save_expr (gnu_expr);
+ gnu_expr = protect_multiple_eval (gnu_expr);
/* Must do this computation in the base type in case the expression's
type is an unsigned subtypes. */
/* If GNU_LOW or GNU_HIGH are a PLACEHOLDER_EXPR, qualify them by
the object we are handling. */
- if (TREE_CODE (gnu_low) != INTEGER_CST && contains_placeholder_p (gnu_low))
- gnu_low = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_low),
- gnu_low, gnu_array_object);
-
- if (TREE_CODE (gnu_high) != INTEGER_CST && contains_placeholder_p (gnu_high))
- gnu_high = build (WITH_RECORD_EXPR, TREE_TYPE (gnu_high),
- gnu_high, gnu_array_object);
+ gnu_low = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_low, gnu_array_object);
+ gnu_high = SUBSTITUTE_PLACEHOLDER_IN_EXPR (gnu_high, gnu_array_object);
/* There's no good type to use here, so we might as well use
integer_type_node. */
gnu_expr_check,
convert (TREE_TYPE (gnu_expr_check),
gnu_high))),
- gnu_expr);
+ gnu_expr, CE_Index_Check_Failed);
}
\f
-/* Given GNU_COND which contains the condition corresponding to an access,
- discriminant or range check, of value GNU_EXPR, build a COND_EXPR
- that returns GNU_EXPR if GNU_COND is false and raises a
- CONSTRAINT_ERROR if GNU_COND is true. */
+/* GNU_COND contains the condition corresponding to an access, discriminant or
+ range check of value GNU_EXPR. Build a COND_EXPR that returns GNU_EXPR if
+ GNU_COND is false and raises a CONSTRAINT_ERROR if GNU_COND is true.
+ REASON is the code that says why the exception was raised. */
static tree
-emit_check (gnu_cond, gnu_expr)
- tree gnu_cond;
- tree gnu_expr;
+emit_check (tree gnu_cond, tree gnu_expr, int reason)
{
tree gnu_call;
+ tree gnu_result;
+
+ gnu_call = build_call_raise (reason);
+
+ /* Use an outer COMPOUND_EXPR to make sure that GNU_EXPR will get evaluated
+ in front of the comparison in case it ends up being a SAVE_EXPR. Put the
+ whole thing inside its own SAVE_EXPR so the inner SAVE_EXPR doesn't leak
+ out. */
+ gnu_result = fold (build3 (COND_EXPR, TREE_TYPE (gnu_expr), gnu_cond,
+ build2 (COMPOUND_EXPR, TREE_TYPE (gnu_expr),
+ gnu_call, gnu_expr),
+ gnu_expr));
+
+ /* If GNU_EXPR has side effects, make the outer COMPOUND_EXPR and
+ protect it. Otherwise, show GNU_RESULT has no side effects: we
+ don't need to evaluate it just for the check. */
+ if (TREE_SIDE_EFFECTS (gnu_expr))
+ gnu_result
+ = build2 (COMPOUND_EXPR, TREE_TYPE (gnu_expr), gnu_expr, gnu_result);
+ else
+ TREE_SIDE_EFFECTS (gnu_result) = 0;
- gnu_call = build_call_raise (raise_constraint_error_decl);
-
- /* Use an outer COMPOUND_EXPR to make sure that GNU_EXPR will
- get evaluated in front of the comparison in case it ends
- up being a SAVE_EXPR. Put the whole thing inside its own
- SAVE_EXPR do the inner SAVE_EXPR doesn't leak out. */
-
- return make_save_expr (build (COMPOUND_EXPR, TREE_TYPE (gnu_expr), gnu_expr,
- fold (build (COND_EXPR, TREE_TYPE (gnu_expr),
- gnu_cond,
- build (COMPOUND_EXPR,
- TREE_TYPE (gnu_expr),
- gnu_call, gnu_expr),
- gnu_expr))));
+ /* ??? Unfortunately, if we don't put a SAVE_EXPR around this whole thing,
+ we will repeatedly do the test. It would be nice if GCC was able
+ to optimize this and only do it once. */
+ return save_expr (gnu_result);
}
\f
/* Return an expression that converts GNU_EXPR to GNAT_TYPE, doing
truncation; otherwise round. */
static tree
-convert_with_check (gnat_type, gnu_expr, overflow_p, range_p, truncate_p)
- Entity_Id gnat_type;
- tree gnu_expr;
- int overflow_p;
- int range_p;
- int truncate_p;
+convert_with_check (Entity_Id gnat_type, tree gnu_expr, bool overflowp,
+ bool rangep, bool truncatep)
{
tree gnu_type = get_unpadded_type (gnat_type);
tree gnu_in_type = TREE_TYPE (gnu_expr);
tree gnu_in_basetype = get_base_type (gnu_in_type);
tree gnu_base_type = get_base_type (gnu_type);
tree gnu_ada_base_type = get_ada_base_type (gnu_type);
- tree gnu_in_lb = TYPE_MIN_VALUE (gnu_in_basetype);
- tree gnu_in_ub = TYPE_MAX_VALUE (gnu_in_basetype);
- tree gnu_out_lb = TYPE_MIN_VALUE (gnu_base_type);
- tree gnu_out_ub = TYPE_MAX_VALUE (gnu_base_type);
tree gnu_result = gnu_expr;
/* If we are not doing any checks, the output is an integral type, and
the input is not a floating type, just do the conversion. This
shortcut is required to avoid problems with packed array types
and simplifies code in all cases anyway. */
- if (! range_p && ! overflow_p && INTEGRAL_TYPE_P (gnu_base_type)
- && ! FLOAT_TYPE_P (gnu_in_type))
+ if (!rangep && !overflowp && INTEGRAL_TYPE_P (gnu_base_type)
+ && !FLOAT_TYPE_P (gnu_in_type))
return convert (gnu_type, gnu_expr);
/* First convert the expression to its base type. This
- will never generate code, but makes the tests below much simpler.
+ will never generate code, but makes the tests below much simpler.
But don't do this if converting from an integer type to an unconstrained
array type since then we need to get the bounds from the original
(unpacked) type. */
/* If overflow checks are requested, we need to be sure the result will
fit in the output base type. But don't do this if the input
is integer and the output floating-point. */
- if (overflow_p
- && ! (FLOAT_TYPE_P (gnu_base_type) && INTEGRAL_TYPE_P (gnu_in_basetype)))
+ if (overflowp
+ && !(FLOAT_TYPE_P (gnu_base_type) && INTEGRAL_TYPE_P (gnu_in_basetype)))
{
/* Ensure GNU_EXPR only gets evaluated once. */
- tree gnu_input = make_save_expr (gnu_result);
+ tree gnu_input = protect_multiple_eval (gnu_result);
tree gnu_cond = integer_zero_node;
+ tree gnu_in_lb = TYPE_MIN_VALUE (gnu_in_basetype);
+ tree gnu_in_ub = TYPE_MAX_VALUE (gnu_in_basetype);
+ tree gnu_out_lb = TYPE_MIN_VALUE (gnu_base_type);
+ tree gnu_out_ub = TYPE_MAX_VALUE (gnu_base_type);
/* Convert the lower bounds to signed types, so we're sure we're
comparing them properly. Likewise, convert the upper bounds
to unsigned types. */
- if (INTEGRAL_TYPE_P (gnu_in_basetype) && TREE_UNSIGNED (gnu_in_basetype))
- gnu_in_lb = convert (signed_type (gnu_in_basetype), gnu_in_lb);
+ if (INTEGRAL_TYPE_P (gnu_in_basetype) && TYPE_UNSIGNED (gnu_in_basetype))
+ gnu_in_lb = convert (gnat_signed_type (gnu_in_basetype), gnu_in_lb);
if (INTEGRAL_TYPE_P (gnu_in_basetype)
- && ! TREE_UNSIGNED (gnu_in_basetype))
- gnu_in_ub = convert (unsigned_type (gnu_in_basetype), gnu_in_ub);
+ && !TYPE_UNSIGNED (gnu_in_basetype))
+ gnu_in_ub = convert (gnat_unsigned_type (gnu_in_basetype), gnu_in_ub);
- if (INTEGRAL_TYPE_P (gnu_base_type) && TREE_UNSIGNED (gnu_base_type))
- gnu_out_lb = convert (signed_type (gnu_base_type), gnu_out_lb);
+ if (INTEGRAL_TYPE_P (gnu_base_type) && TYPE_UNSIGNED (gnu_base_type))
+ gnu_out_lb = convert (gnat_signed_type (gnu_base_type), gnu_out_lb);
- if (INTEGRAL_TYPE_P (gnu_base_type) && ! TREE_UNSIGNED (gnu_base_type))
- gnu_out_ub = convert (unsigned_type (gnu_base_type), gnu_out_ub);
+ if (INTEGRAL_TYPE_P (gnu_base_type) && !TYPE_UNSIGNED (gnu_base_type))
+ gnu_out_ub = convert (gnat_unsigned_type (gnu_base_type), gnu_out_ub);
/* Check each bound separately and only if the result bound
is tighter than the bound on the input type. Note that all the
the comparison is done in the base type of the input, which
always has the proper signedness. First check for input
integer (which means output integer), output float (which means
- both float), or mixed, in which case we always compare.
+ both float), or mixed, in which case we always compare.
Note that we have to do the comparison which would *fail* in the
case of an error since if it's an FP comparison and one of the
values is a NaN or Inf, the comparison will fail. */
convert (gnu_in_basetype,
gnu_out_ub))));
- if (! integer_zerop (gnu_cond))
- gnu_result = emit_check (gnu_cond, gnu_input);
+ if (!integer_zerop (gnu_cond))
+ gnu_result = emit_check (gnu_cond, gnu_input,
+ CE_Overflow_Check_Failed);
}
/* Now convert to the result base type. If this is a non-truncating
float-to-integer conversion, round. */
if (INTEGRAL_TYPE_P (gnu_ada_base_type) && FLOAT_TYPE_P (gnu_in_basetype)
- && ! truncate_p)
+ && !truncatep)
{
- tree gnu_point_5 = build_real (gnu_in_basetype, dconstp5);
- tree gnu_minus_point_5 = build_real (gnu_in_basetype, dconstmp5);
- tree gnu_zero = convert (gnu_in_basetype, integer_zero_node);
- tree gnu_saved_result = save_expr (gnu_result);
- tree gnu_comp = build (GE_EXPR, integer_type_node,
- gnu_saved_result, gnu_zero);
- tree gnu_adjust = build (COND_EXPR, gnu_in_basetype, gnu_comp,
- gnu_point_5, gnu_minus_point_5);
-
- gnu_result
- = build (PLUS_EXPR, gnu_in_basetype, gnu_saved_result, gnu_adjust);
+ REAL_VALUE_TYPE half_minus_pred_half, pred_half;
+ tree gnu_conv, gnu_zero, gnu_comp, gnu_saved_result, calc_type;
+ tree gnu_pred_half, gnu_add_pred_half, gnu_subtract_pred_half;
+ const struct real_format *fmt;
+
+ /* The following calculations depend on proper rounding to even
+ of each arithmetic operation. In order to prevent excess
+ precision from spoiling this property, use the widest hardware
+ floating-point type.
+
+ FIXME: For maximum efficiency, this should only be done for machines
+ and types where intermediates may have extra precision. */
+
+ calc_type = longest_float_type_node;
+ /* FIXME: Should not have padding in the first place */
+ if (TREE_CODE (calc_type) == RECORD_TYPE
+ && TYPE_IS_PADDING_P (calc_type))
+ calc_type = TREE_TYPE (TYPE_FIELDS (calc_type));
+
+ /* Compute the exact value calc_type'Pred (0.5) at compile time. */
+ fmt = REAL_MODE_FORMAT (TYPE_MODE (calc_type));
+ real_2expN (&half_minus_pred_half, -(fmt->p) - 1);
+ REAL_ARITHMETIC (pred_half, MINUS_EXPR, dconsthalf,
+ half_minus_pred_half);
+ gnu_pred_half = build_real (calc_type, pred_half);
+
+ /* If the input is strictly negative, subtract this value
+ and otherwise add it from the input. For 0.5, the result
+ is exactly between 1.0 and the machine number preceding 1.0
+ (for calc_type). Since the last bit of 1.0 is even, this 0.5
+ will round to 1.0, while all other number with an absolute
+ value less than 0.5 round to 0.0. For larger numbers exactly
+ halfway between integers, rounding will always be correct as
+ the true mathematical result will be closer to the higher
+ integer compared to the lower one. So, this constant works
+ for all floating-point numbers.
+
+ The reason to use the same constant with subtract/add instead
+ of a positive and negative constant is to allow the comparison
+ to be scheduled in parallel with retrieval of the constant and
+ conversion of the input to the calc_type (if necessary).
+ */
+
+ gnu_zero = convert (gnu_in_basetype, integer_zero_node);
+ gnu_saved_result = save_expr (gnu_result);
+ gnu_conv = convert (calc_type, gnu_saved_result);
+ gnu_comp = build2 (GE_EXPR, integer_type_node,
+ gnu_saved_result, gnu_zero);
+ gnu_add_pred_half
+ = build2 (PLUS_EXPR, calc_type, gnu_conv, gnu_pred_half);
+ gnu_subtract_pred_half
+ = build2 (MINUS_EXPR, calc_type, gnu_conv, gnu_pred_half);
+ gnu_result = build3 (COND_EXPR, calc_type, gnu_comp,
+ gnu_add_pred_half, gnu_subtract_pred_half);
}
if (TREE_CODE (gnu_ada_base_type) == INTEGER_TYPE
&& TYPE_HAS_ACTUAL_BOUNDS_P (gnu_ada_base_type)
&& TREE_CODE (gnu_result) == UNCONSTRAINED_ARRAY_REF)
- gnu_result = unchecked_convert (gnu_ada_base_type, gnu_result);
+ gnu_result = unchecked_convert (gnu_ada_base_type, gnu_result, false);
else
gnu_result = convert (gnu_ada_base_type, gnu_result);
result type is a modular type, the range check is actually
an overflow check. */
- if (range_p
+ if (rangep
|| (TREE_CODE (gnu_base_type) == INTEGER_TYPE
- && TYPE_MODULAR_P (gnu_base_type) && overflow_p))
+ && TYPE_MODULAR_P (gnu_base_type) && overflowp))
gnu_result = emit_range_check (gnu_result, gnat_type);
return convert (gnu_type, gnu_result);
\f
/* Return 1 if GNU_EXPR can be directly addressed. This is the case unless
it is an expression involving computation or if it involves a bitfield
- reference. This returns the same as mark_addressable in most cases. */
+ reference. This returns the same as gnat_mark_addressable in most
+ cases. */
-static int
-addressable_p (gnu_expr)
- tree gnu_expr;
+static bool
+addressable_p (tree gnu_expr)
{
switch (TREE_CODE (gnu_expr))
{
- case UNCONSTRAINED_ARRAY_REF:
- case INDIRECT_REF:
case VAR_DECL:
case PARM_DECL:
case FUNCTION_DECL:
case RESULT_DECL:
+ /* All DECLs are addressable: if they are in a register, we can force
+ them to memory. */
+ return true;
+
+ case UNCONSTRAINED_ARRAY_REF:
+ case INDIRECT_REF:
case CONSTRUCTOR:
case NULL_EXPR:
- return 1;
+ case SAVE_EXPR:
+ return true;
case COMPONENT_REF:
- return (! DECL_BIT_FIELD (TREE_OPERAND (gnu_expr, 1))
+ return (!DECL_BIT_FIELD (TREE_OPERAND (gnu_expr, 1))
+ && (!DECL_NONADDRESSABLE_P (TREE_OPERAND (gnu_expr, 1))
+ || !flag_strict_aliasing)
&& addressable_p (TREE_OPERAND (gnu_expr, 0)));
case ARRAY_REF: case ARRAY_RANGE_REF:
return (AGGREGATE_TYPE_P (TREE_TYPE (gnu_expr))
&& addressable_p (TREE_OPERAND (gnu_expr, 0)));
- case UNCHECKED_CONVERT_EXPR:
+ case VIEW_CONVERT_EXPR:
{
- /* This is addressable if the code in gnat_expand_expr can do
- it by either just taking the operand or by pointer punning. */
- tree inner = TREE_OPERAND (gnu_expr, 0);
+ /* This is addressable if we can avoid a copy. */
tree type = TREE_TYPE (gnu_expr);
- tree inner_type = TREE_TYPE (inner);
-
- return ((TYPE_MODE (type) == TYPE_MODE (inner_type)
- && (TYPE_ALIGN (type) <= TYPE_ALIGN (inner_type)
- || TYPE_ALIGN (inner_type) >= BIGGEST_ALIGNMENT))
- || ((TYPE_MODE (type) == BLKmode
- || TYPE_MODE (inner_type) == BLKmode)
- && (TYPE_ALIGN (type) <= TYPE_ALIGN (inner_type)
- || TYPE_ALIGN (inner_type) >= BIGGEST_ALIGNMENT
- || TYPE_ALIGN_OK_P (type)
- || TYPE_ALIGN_OK_P (inner_type))));
+ tree inner_type = TREE_TYPE (TREE_OPERAND (gnu_expr, 0));
+
+ return (((TYPE_MODE (type) == TYPE_MODE (inner_type)
+ && (TYPE_ALIGN (type) <= TYPE_ALIGN (inner_type)
+ || TYPE_ALIGN (inner_type) >= BIGGEST_ALIGNMENT))
+ || ((TYPE_MODE (type) == BLKmode
+ || TYPE_MODE (inner_type) == BLKmode)
+ && (TYPE_ALIGN (type) <= TYPE_ALIGN (inner_type)
+ || TYPE_ALIGN (inner_type) >= BIGGEST_ALIGNMENT
+ || TYPE_ALIGN_OK (type)
+ || TYPE_ALIGN_OK (inner_type))))
+ && addressable_p (TREE_OPERAND (gnu_expr, 0)));
}
default:
- return 0;
+ return false;
}
}
\f
/* Do the processing for the declaration of a GNAT_ENTITY, a type. If
a separate Freeze node exists, delay the bulk of the processing. Otherwise
- make a GCC type for GNAT_ENTITY and set up the correspondance. */
+ make a GCC type for GNAT_ENTITY and set up the correspondence. */
void
-process_type (gnat_entity)
- Entity_Id gnat_entity;
+process_type (Entity_Id gnat_entity)
{
tree gnu_old
= present_gnu_tree (gnat_entity) ? get_gnu_tree (gnat_entity) : 0;
|| (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
&& Present (Full_View (gnat_entity))
&& Freeze_Node (Full_View (gnat_entity))
- && ! present_gnu_tree (Full_View (gnat_entity))))
+ && !present_gnu_tree (Full_View (gnat_entity))))
{
elaborate_entity (gnat_entity);
- if (gnu_old == 0)
+ if (!gnu_old)
{
tree gnu_decl = create_type_decl (get_entity_name (gnat_entity),
make_dummy_type (gnat_entity),
- 0, 0, 0);
+ NULL, false, false, gnat_entity);
- save_gnu_tree (gnat_entity, gnu_decl, 0);
+ save_gnu_tree (gnat_entity, gnu_decl, false);
if (IN (Ekind (gnat_entity), Incomplete_Or_Private_Kind)
&& Present (Full_View (gnat_entity)))
- save_gnu_tree (Full_View (gnat_entity), gnu_decl, 0);
+ save_gnu_tree (Full_View (gnat_entity), gnu_decl, false);
}
return;
made the type that corresponds to the full type of an incomplete
type. Clear that type for now and then update the type in the
pointers. */
- if (gnu_old != 0)
+ if (gnu_old)
{
if (TREE_CODE (gnu_old) != TYPE_DECL
- || ! TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old)))
+ || !TYPE_IS_DUMMY_P (TREE_TYPE (gnu_old)))
{
/* If this was a withed access type, this is not an error
and merely indicates we've already elaborated the type
already. */
- if (Is_Type (gnat_entity) && From_With_Type (gnat_entity))
- return;
-
- gigi_abort (323);
+ gcc_assert (Is_Type (gnat_entity) && From_With_Type (gnat_entity));
+ return;
}
- save_gnu_tree (gnat_entity, NULL_TREE, 0);
+ save_gnu_tree (gnat_entity, NULL_TREE, false);
}
/* Now fully elaborate the type. */
gnu_new = gnat_to_gnu_entity (gnat_entity, NULL_TREE, 1);
- if (TREE_CODE (gnu_new) != TYPE_DECL)
- gigi_abort (324);
+ gcc_assert (TREE_CODE (gnu_new) == TYPE_DECL);
/* If we have an old type and we've made pointers to this type,
update those pointers. */
- if (gnu_old != 0)
+ if (gnu_old)
update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_old)),
TREE_TYPE (gnu_new));
- /* If this is a record type corresponding to a task or protected type
+ /* If this is a record type corresponding to a task or protected type
that is a completion of an incomplete type, perform a similar update
on the type. */
/* ??? Including protected types here is a guess. */
= get_gnu_tree (Corresponding_Concurrent_Type (gnat_entity));
save_gnu_tree (Corresponding_Concurrent_Type (gnat_entity),
- NULL_TREE, 0);
+ NULL_TREE, false);
save_gnu_tree (Corresponding_Concurrent_Type (gnat_entity),
- gnu_new, 0);
+ gnu_new, false);
update_pointer_to (TYPE_MAIN_VARIANT (TREE_TYPE (gnu_task_old)),
TREE_TYPE (gnu_new));
}
\f
/* GNAT_ASSOC is the front of the Component_Associations of an N_Aggregate.
- GNU_TYPE is the GCC type of the corresponding record.
+ GNU_TYPE is the GCC type of the corresponding record.
Return a CONSTRUCTOR to build the record. */
static tree
-assoc_to_constructor (gnat_assoc, gnu_type)
- Node_Id gnat_assoc;
- tree gnu_type;
+assoc_to_constructor (Node_Id gnat_assoc, tree gnu_type)
{
- tree gnu_field, gnu_list, gnu_result;
+ tree gnu_list, gnu_result;
/* We test for GNU_FIELD being empty in the case where a variant
was the last thing since we don't take things off GNAT_ASSOC in
gnat_assoc = Next (gnat_assoc))
{
Node_Id gnat_field = First (Choices (gnat_assoc));
- tree gnu_field = gnat_to_gnu_entity (Entity (gnat_field), NULL_TREE, 0);
+ tree gnu_field = gnat_to_gnu_field_decl (Entity (gnat_field));
tree gnu_expr = gnat_to_gnu (Expression (gnat_assoc));
/* The expander is supposed to put a single component selector name
in every record component association */
- if (Next (gnat_field))
- gigi_abort (328);
+ gcc_assert (No (Next (gnat_field)));
+
+ /* Ignore fields that have Corresponding_Discriminants since we'll
+ be setting that field in the parent. */
+ if (Present (Corresponding_Discriminant (Entity (gnat_field)))
+ && Is_Tagged_Type (Scope (Entity (gnat_field))))
+ continue;
/* Before assigning a value in an aggregate make sure range checks
are done if required. Then convert to the type of the field. */
gnu_result = extract_values (gnu_list, gnu_type);
- /* Verify every enty in GNU_LIST was used. */
- for (gnu_field = gnu_list; gnu_field; gnu_field = TREE_CHAIN (gnu_field))
- if (! TREE_ADDRESSABLE (gnu_field))
- gigi_abort (311);
+#ifdef ENABLE_CHECKING
+ {
+ tree gnu_field;
+
+ /* Verify every enty in GNU_LIST was used. */
+ for (gnu_field = gnu_list; gnu_field; gnu_field = TREE_CHAIN (gnu_field))
+ gcc_assert (TREE_ADDRESSABLE (gnu_field));
+ }
+#endif
return gnu_result;
}
of the array component. It is needed for range checking. */
static tree
-pos_to_constructor (gnat_expr, gnu_array_type, gnat_component_type)
- Node_Id gnat_expr;
- tree gnu_array_type;
- Entity_Id gnat_component_type;
+pos_to_constructor (Node_Id gnat_expr, tree gnu_array_type,
+ Entity_Id gnat_component_type)
{
- tree gnu_expr;
tree gnu_expr_list = NULL_TREE;
+ tree gnu_index = TYPE_MIN_VALUE (TYPE_DOMAIN (gnu_array_type));
+ tree gnu_expr;
for ( ; Present (gnat_expr); gnat_expr = Next (gnat_expr))
{
}
gnu_expr_list
- = tree_cons (NULL_TREE, convert (TREE_TYPE (gnu_array_type), gnu_expr),
+ = tree_cons (gnu_index, convert (TREE_TYPE (gnu_array_type), gnu_expr),
gnu_expr_list);
+
+ gnu_index = int_const_binop (PLUS_EXPR, gnu_index, integer_one_node, 0);
}
- return build_constructor (gnu_array_type, nreverse (gnu_expr_list));
+ return gnat_build_constructor (gnu_array_type, nreverse (gnu_expr_list));
}
\f
/* Subroutine of assoc_to_constructor: VALUES is a list of field associations,
record, make a recursive call to fill it in as well. */
static tree
-extract_values (values, record_type)
- tree values;
- tree record_type;
+extract_values (tree values, tree record_type)
{
tree result = NULL_TREE;
tree field, tem;
/* _Parent is an internal field, but may have values in the aggregate,
so check for values first. */
- if ((tem = purpose_member (field, values)) != 0)
+ if ((tem = purpose_member (field, values)))
{
value = TREE_VALUE (tem);
TREE_ADDRESSABLE (tem) = 1;
else if (DECL_INTERNAL_P (field))
{
value = extract_values (values, TREE_TYPE (field));
- if (TREE_CODE (value) == CONSTRUCTOR
- && CONSTRUCTOR_ELTS (value) == 0)
+ if (TREE_CODE (value) == CONSTRUCTOR && !CONSTRUCTOR_ELTS (value))
value = 0;
}
else
TREE_ADDRESSABLE (tem) = 1;
}
- if (value == 0)
+ if (!value)
continue;
result = tree_cons (field, value, result);
}
- return build_constructor (record_type, nreverse (result));
+ return gnat_build_constructor (record_type, nreverse (result));
}
\f
/* EXP is to be treated as an array or record. Handle the cases when it is
an access object and perform the required dereferences. */
static tree
-maybe_implicit_deref (exp)
- tree exp;
+maybe_implicit_deref (tree exp)
{
/* If the type is a pointer, dereference it. */
return exp;
}
\f
-/* Surround EXP with a SAVE_EXPR, but handle unconstrained objects specially
- since it doesn't make any sense to put them in a SAVE_EXPR. */
+/* Protect EXP from multiple evaluation. This may make a SAVE_EXPR. */
tree
-make_save_expr (exp)
- tree exp;
+protect_multiple_eval (tree exp)
{
tree type = TREE_TYPE (exp);
- /* If this is an unchecked conversion, save the input since we may need to
- handle this expression separately if it's the operand of a component
- reference. */
- if (TREE_CODE (exp) == UNCHECKED_CONVERT_EXPR)
- return build1 (UNCHECKED_CONVERT_EXPR, type,
- make_save_expr (TREE_OPERAND (exp, 0)));
-
- /* If this is an aggregate type, we may be doing a dereference of it in
- the LHS side of an assignment. In that case, we need to evaluate
- it , take its address, make a SAVE_EXPR of that, then do the indirect
- reference. Note that for an unconstrained array, the effect will be
- to make a SAVE_EXPR of the fat pointer.
-
- ??? This is an efficiency problem in the case of a type that can be
- placed into memory, but until we can deal with the LHS issue,
- we have to take that hit. This really should test for BLKmode. */
- else if (TREE_CODE (type) == UNCONSTRAINED_ARRAY_TYPE
- || (AGGREGATE_TYPE_P (type) && ! TYPE_FAT_POINTER_P (type)))
+ /* If this has no side effects, we don't need to do anything. */
+ if (!TREE_SIDE_EFFECTS (exp))
+ return exp;
+
+ /* If it is a conversion, protect what's inside the conversion.
+ Similarly, if we're indirectly referencing something, we only
+ actually need to protect the address since the data itself can't
+ change in these situations. */
+ else if (TREE_CODE (exp) == NON_LVALUE_EXPR
+ || TREE_CODE (exp) == NOP_EXPR || TREE_CODE (exp) == CONVERT_EXPR
+ || TREE_CODE (exp) == VIEW_CONVERT_EXPR
+ || TREE_CODE (exp) == INDIRECT_REF
+ || TREE_CODE (exp) == UNCONSTRAINED_ARRAY_REF)
+ return build1 (TREE_CODE (exp), type,
+ protect_multiple_eval (TREE_OPERAND (exp, 0)));
+
+ /* If EXP is a fat pointer or something that can be placed into a register,
+ just make a SAVE_EXPR. */
+ if (TYPE_FAT_POINTER_P (type) || TYPE_MODE (type) != BLKmode)
+ return save_expr (exp);
+
+ /* Otherwise, dereference, protect the address, and re-reference. */
+ else
return
build_unary_op (INDIRECT_REF, type,
save_expr (build_unary_op (ADDR_EXPR,
build_reference_type (type),
exp)));
-
- /* Otherwise, just do the usual thing. */
- return save_expr (exp);
}
\f
/* This is equivalent to stabilize_reference in GCC's tree.c, but we know
- how to handle our new nodes and we take an extra argument that says
+ how to handle our new nodes and we take an extra argument that says
whether to force evaluation of everything. */
tree
-gnat_stabilize_reference (ref, force)
- tree ref;
- int force;
+gnat_stabilize_reference (tree ref, bool force)
{
- register tree type = TREE_TYPE (ref);
- register enum tree_code code = TREE_CODE (ref);
- register tree result;
+ tree type = TREE_TYPE (ref);
+ enum tree_code code = TREE_CODE (ref);
+ tree result;
switch (code)
{
case FIX_FLOOR_EXPR:
case FIX_ROUND_EXPR:
case FIX_CEIL_EXPR:
- case UNCHECKED_CONVERT_EXPR:
+ case VIEW_CONVERT_EXPR:
case ADDR_EXPR:
result
= build1 (code, type,
break;
case COMPONENT_REF:
- result = build (COMPONENT_REF, type,
- gnat_stabilize_reference (TREE_OPERAND (ref, 0),
- force),
- TREE_OPERAND (ref, 1));
+ result = build3 (COMPONENT_REF, type,
+ gnat_stabilize_reference (TREE_OPERAND (ref, 0),
+ force),
+ TREE_OPERAND (ref, 1), NULL_TREE);
break;
case BIT_FIELD_REF:
- result = build (BIT_FIELD_REF, type,
- gnat_stabilize_reference (TREE_OPERAND (ref, 0), force),
- gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1),
- force),
- gnat_stabilize_reference_1 (TREE_OPERAND (ref, 2),
- force));
+ result = build3 (BIT_FIELD_REF, type,
+ gnat_stabilize_reference (TREE_OPERAND (ref, 0), force),
+ gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1),
+ force),
+ gnat_stabilize_reference_1 (TREE_OPERAND (ref, 2),
+ force));
break;
case ARRAY_REF:
- result = build (ARRAY_REF, type,
- gnat_stabilize_reference (TREE_OPERAND (ref, 0), force),
- gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1),
- force));
- break;
-
case ARRAY_RANGE_REF:
- result = build (ARRAY_RANGE_REF, type,
- gnat_stabilize_reference (TREE_OPERAND (ref, 0), force),
- gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1),
- force));
+ result = build4 (code, type,
+ gnat_stabilize_reference (TREE_OPERAND (ref, 0), force),
+ gnat_stabilize_reference_1 (TREE_OPERAND (ref, 1),
+ force),
+ NULL_TREE, NULL_TREE);
break;
case COMPOUND_EXPR:
- result = build (COMPOUND_EXPR, type,
- gnat_stabilize_reference_1 (TREE_OPERAND (ref, 0),
- force),
- gnat_stabilize_reference (TREE_OPERAND (ref, 1),
- force));
- break;
-
- case RTL_EXPR:
- result = build1 (INDIRECT_REF, type,
- save_expr (build1 (ADDR_EXPR,
- build_reference_type (type), ref)));
+ result = build2 (COMPOUND_EXPR, type,
+ gnat_stabilize_reference_1 (TREE_OPERAND (ref, 0),
+ force),
+ gnat_stabilize_reference (TREE_OPERAND (ref, 1),
+ force));
break;
/* If arg isn't a kind of lvalue we recognize, make no change.
}
TREE_READONLY (result) = TREE_READONLY (ref);
+
+ /* TREE_THIS_VOLATILE and TREE_SIDE_EFFECTS attached to the initial
+ expression may not be sustained across some paths, such as the way via
+ build1 for INDIRECT_REF. We re-populate those flags here for the general
+ case, which is consistent with the GCC version of this routine.
+
+ Special care should be taken regarding TREE_SIDE_EFFECTS, because some
+ paths introduce side effects where there was none initially (e.g. calls
+ to save_expr), and we also want to keep track of that. */
+
+ TREE_THIS_VOLATILE (result) = TREE_THIS_VOLATILE (ref);
+ TREE_SIDE_EFFECTS (result) |= TREE_SIDE_EFFECTS (ref);
+
return result;
}
arg to force a SAVE_EXPR for everything. */
static tree
-gnat_stabilize_reference_1 (e, force)
- tree e;
- int force;
+gnat_stabilize_reference_1 (tree e, bool force)
{
- register enum tree_code code = TREE_CODE (e);
- register tree type = TREE_TYPE (e);
- register tree result;
+ enum tree_code code = TREE_CODE (e);
+ tree type = TREE_TYPE (e);
+ tree result;
/* We cannot ignore const expressions because it might be a reference
to a const array but whose index contains side-effects. But we can
switch (TREE_CODE_CLASS (code))
{
- case 'x':
- case 't':
- case 'd':
- case 'b':
- case '<':
- case 's':
- case 'e':
- case 'r':
- if (TREE_SIDE_EFFECTS (e) || force)
+ case tcc_exceptional:
+ case tcc_type:
+ case tcc_declaration:
+ case tcc_comparison:
+ case tcc_statement:
+ case tcc_expression:
+ case tcc_reference:
+ /* If this is a COMPONENT_REF of a fat pointer, save the entire
+ fat pointer. This may be more efficient, but will also allow
+ us to more easily find the match for the PLACEHOLDER_EXPR. */
+ if (code == COMPONENT_REF
+ && TYPE_FAT_POINTER_P (TREE_TYPE (TREE_OPERAND (e, 0))))
+ result = build3 (COMPONENT_REF, type,
+ gnat_stabilize_reference_1 (TREE_OPERAND (e, 0),
+ force),
+ TREE_OPERAND (e, 1), TREE_OPERAND (e, 2));
+ else if (TREE_SIDE_EFFECTS (e) || force)
return save_expr (e);
- return e;
+ else
+ return e;
+ break;
- case 'c':
+ case tcc_constant:
/* Constants need no processing. In fact, we should never reach
here. */
return e;
- case '2':
- /* Division is slow and tends to be compiled with jumps,
- especially the division by powers of 2 that is often
- found inside of an array reference. So do it just once. */
- if (code == TRUNC_DIV_EXPR || code == TRUNC_MOD_EXPR
- || code == FLOOR_DIV_EXPR || code == FLOOR_MOD_EXPR
- || code == CEIL_DIV_EXPR || code == CEIL_MOD_EXPR
- || code == ROUND_DIV_EXPR || code == ROUND_MOD_EXPR)
- return save_expr (e);
+ case tcc_binary:
/* Recursively stabilize each operand. */
- result = build (code, type,
- gnat_stabilize_reference_1 (TREE_OPERAND (e, 0), force),
- gnat_stabilize_reference_1 (TREE_OPERAND (e, 1), force));
+ result = build2 (code, type,
+ gnat_stabilize_reference_1 (TREE_OPERAND (e, 0), force),
+ gnat_stabilize_reference_1 (TREE_OPERAND (e, 1),
+ force));
break;
- case '1':
+ case tcc_unary:
/* Recursively stabilize each operand. */
result = build1 (code, type,
gnat_stabilize_reference_1 (TREE_OPERAND (e, 0),
break;
default:
- abort ();
+ gcc_unreachable ();
}
TREE_READONLY (result) = TREE_READONLY (e);
- return result;
-}
-\f
-/* GNAT_UNIT is the Defining_Identifier for some package or subprogram,
- either a spec or a body, BODY_P says which. If needed, make a function
- to be the elaboration routine for that object and perform the elaborations
- in GNU_ELAB_LIST.
-
- Return 1 if we didn't need an elaboration function, zero otherwise. */
-
-static int
-build_unit_elab (gnat_unit, body_p, gnu_elab_list)
- Entity_Id gnat_unit;
- int body_p;
- tree gnu_elab_list;
-{
- tree gnu_decl;
- rtx insn;
- int result = 1;
-
- /* If we have nothing to do, return. */
- if (gnu_elab_list == 0)
- return 1;
-
- /* Set our file and line number to that of the object and set up the
- elaboration routine. */
- gnu_decl = create_subprog_decl (create_concat_name (gnat_unit,
- body_p ?
- "elabb" : "elabs"),
- NULL_TREE, void_ftype, NULL_TREE, 0, 1, 0,
- 0);
- DECL_ELABORATION_PROC_P (gnu_decl) = 1;
-
- begin_subprog_body (gnu_decl);
- set_lineno (gnat_unit, 1);
- pushlevel (0);
- gnu_block_stack = tree_cons (NULL_TREE, NULL_TREE, gnu_block_stack);
- expand_start_bindings (0);
-
- /* Emit the assignments for the elaborations we have to do. If there
- is no destination, this is just a call to execute some statement
- that was placed within the declarative region. But first save a
- pointer so we can see if any insns were generated. */
-
- insn = get_last_insn ();
-
- for (; gnu_elab_list; gnu_elab_list = TREE_CHAIN (gnu_elab_list))
- if (TREE_PURPOSE (gnu_elab_list) == NULL_TREE)
- {
- if (TREE_VALUE (gnu_elab_list) != 0)
- expand_expr_stmt (TREE_VALUE (gnu_elab_list));
- }
- else
- {
- tree lhs = TREE_PURPOSE (gnu_elab_list);
-
- input_filename = DECL_SOURCE_FILE (lhs);
- lineno = DECL_SOURCE_LINE (lhs);
-
- /* If LHS has a padded type, convert it to the unpadded type
- so the assignment is done properly. */
- if (TREE_CODE (TREE_TYPE (lhs)) == RECORD_TYPE
- && TYPE_IS_PADDING_P (TREE_TYPE (lhs)))
- lhs = convert (TREE_TYPE (TYPE_FIELDS (TREE_TYPE (lhs))), lhs);
-
- emit_line_note (input_filename, lineno);
- expand_expr_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE,
- TREE_PURPOSE (gnu_elab_list),
- TREE_VALUE (gnu_elab_list)));
- }
-
- /* See if any non-NOTE insns were generated. */
- for (insn = NEXT_INSN (insn); insn; insn = NEXT_INSN (insn))
- if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
- {
- result = 0;
- break;
- }
-
- expand_end_bindings (getdecls (), kept_level_p (), 0);
- poplevel (kept_level_p (), 1, 0);
- gnu_block_stack = TREE_CHAIN (gnu_block_stack);
- end_subprog_body ();
- /* If there were no insns, we don't need an elab routine. It would
- be nice to not output this one, but there's no good way to do that. */
+ TREE_THIS_VOLATILE (result) = TREE_THIS_VOLATILE (e);
+ TREE_SIDE_EFFECTS (result) |= TREE_SIDE_EFFECTS (e);
return result;
}
\f
-extern char *__gnat_to_canonical_file_spec PARAMS ((char *));
+extern char *__gnat_to_canonical_file_spec (char *);
-/* Determine the input_filename and the lineno from the source location
- (Sloc) of GNAT_NODE node. Set the global variable input_filename and
- lineno. If WRITE_NOTE_P is true, emit a line number note. */
+/* Convert Sloc into *LOCUS (a location_t). Return true if this Sloc
+ corresponds to a source code location and false if it doesn't. In the
+ latter case, we don't update *LOCUS. We also set the Gigi global variable
+ REF_FILENAME to the reference file name as given by sinput (i.e no
+ directory). */
-void
-set_lineno (gnat_node, write_note_p)
- Node_Id gnat_node;
- int write_note_p;
+bool
+Sloc_to_locus (Source_Ptr Sloc, location_t *locus)
{
- Source_Ptr source_location = Sloc (gnat_node);
-
/* If node not from source code, ignore. */
- if (source_location < 0)
- return;
+ if (Sloc < 0)
+ return false;
/* Use the identifier table to make a hashed, permanent copy of the filename,
since the name table gets reallocated after Gigi returns but before all
- the debugging information is output. The call to
- __gnat_to_canonical_file_spec translates filenames from pragmas
- Source_Reference that contain host style syntax not understood by gdb. */
- input_filename
+ the debugging information is output. The __gnat_to_canonical_file_spec
+ call translates filenames from pragmas Source_Reference that contain host
+ style syntax not understood by gdb. */
+ locus->file
= IDENTIFIER_POINTER
(get_identifier
(__gnat_to_canonical_file_spec
- (Get_Name_String
- (Debug_Source_Name (Get_Source_File_Index (source_location))))));
+ (Get_Name_String (Full_Debug_Name (Get_Source_File_Index (Sloc))))));
+
+ locus->line = Get_Logical_Line_Number (Sloc);
- /* ref_filename is the reference file name as given by sinput (i.e no
- directory) */
ref_filename
= IDENTIFIER_POINTER
(get_identifier
- (Get_Name_String
- (Reference_Name (Get_Source_File_Index (source_location)))));;
- lineno = Get_Logical_Line_Number (source_location);
+ (Get_Name_String (Debug_Source_Name (Get_Source_File_Index (Sloc)))));;
+
+ return true;
+}
+
+/* Similar to annotate_with_locus, but start with the Sloc of GNAT_NODE and
+ don't do anything if it doesn't correspond to a source location. */
+
+static void
+annotate_with_node (tree node, Node_Id gnat_node)
+{
+ location_t locus;
- if (write_note_p)
- emit_line_note (input_filename, lineno);
+ if (!Sloc_to_locus (Sloc (gnat_node), &locus))
+ return;
+
+ annotate_with_locus (node, locus);
}
\f
/* Post an error message. MSG is the error message, properly annotated.
"&" substitution. */
void
-post_error (msg, node)
- const char *msg;
- Node_Id node;
+post_error (const char *msg, Node_Id node)
{
String_Template temp;
Fat_Pointer fp;
is the node to use for the "&" substitution. */
void
-post_error_ne (msg, node, ent)
- const char *msg;
- Node_Id node;
- Entity_Id ent;
+post_error_ne (const char *msg, Node_Id node, Entity_Id ent)
{
String_Template temp;
Fat_Pointer fp;
to use for the "&" substitution, and N is the number to use for the ^. */
void
-post_error_ne_num (msg, node, ent, n)
- const char *msg;
- Node_Id node;
- Entity_Id ent;
- int n;
+post_error_ne_num (const char *msg, Node_Id node, Entity_Id ent, int n)
{
String_Template temp;
Fat_Pointer fp;
and the text inside square brackets will be output instead. */
void
-post_error_ne_tree (msg, node, ent, t)
- const char *msg;
- Node_Id node;
- Entity_Id ent;
- tree t;
+post_error_ne_tree (const char *msg, Node_Id node, Entity_Id ent, tree t)
{
char *newmsg = alloca (strlen (msg) + 1);
String_Template temp = {1, 0};
if (host_integerp (t, 1)
#if HOST_BITS_PER_WIDE_INT > HOST_BITS_PER_INT
- && compare_tree_int (t, 1 << (HOST_BITS_PER_INT - 2)) < 0
+ &&
+ compare_tree_int
+ (t, (((unsigned HOST_WIDE_INT) 1 << (HOST_BITS_PER_INT - 1)) - 1)) < 0
#endif
)
{
else
start_yes = '[', end_yes = ']', start_no = '{', end_no = '}';
- for (p = msg, q = newmsg; *p != 0; p++)
+ for (p = msg, q = newmsg; *p; p++)
{
if (*p == start_yes)
for (p++; *p != end_yes; p++)
integer to write in the message. */
void
-post_error_ne_tree_2 (msg, node, ent, t, num)
- const char *msg;
- Node_Id node;
- Entity_Id ent;
- tree t;
- int num;
+post_error_ne_tree_2 (const char *msg,
+ Node_Id node,
+ Entity_Id ent,
+ tree t,
+ int num)
{
Error_Msg_Uint_2 = UI_From_Int (num);
post_error_ne_tree (msg, node, ent, t);
}
-
-/* Set the node for a second '&' in the error message. */
-
-void
-set_second_error_entity (e)
- Entity_Id e;
-{
- Error_Msg_Node_2 = e;
-}
-\f
-/* Signal abort, with "Gigi abort" as the error label, and error_gnat_node
- as the relevant node that provides the location info for the error */
-
-void
-gigi_abort (code)
- int code;
-{
- String_Template temp = {1, 10};
- Fat_Pointer fp;
-
- fp.Array = "Gigi abort", fp.Bounds = &temp;
-
- Current_Error_Node = error_gnat_node;
- Compiler_Abort (fp, code);
-}
\f
/* Initialize the table that maps GNAT codes to GCC codes for simple
binary and unary operations. */
void
-init_code_table ()
+init_code_table (void)
{
gnu_codes[N_And_Then] = TRUTH_ANDIF_EXPR;
gnu_codes[N_Or_Else] = TRUTH_ORIF_EXPR;
gnu_codes[N_Op_Shift_Right] = RSHIFT_EXPR;
gnu_codes[N_Op_Shift_Right_Arithmetic] = RSHIFT_EXPR;
}
+
+#include "gt-ada-trans.h"
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