/* Language-specific hook definitions for C front end.
Copyright (C) 1991, 1995, 1997, 1998,
- 1999, 2000, 2001 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
+#include "c-tree.h"
+#include "c-common.h"
+#include "ggc.h"
+#include "langhooks.h"
+#include "langhooks-def.h"
#include "tree-inline.h"
-#include "function.h"
-#include "input.h"
-#include "toplev.h"
#include "diagnostic.h"
-#include "output.h"
-#include "flags.h"
-#include "ggc.h"
-#include "rtl.h"
-#include "expr.h"
-#include "c-tree.h"
-#include "c-lex.h"
-#include "cpplib.h"
-#include "insn-config.h"
-#include "integrate.h"
-
-static int c_tree_printer PARAMS ((output_buffer *));
-static int c_missing_noreturn_ok_p PARAMS ((tree));
-static void c_init PARAMS ((void));
-static void c_init_options PARAMS ((void));
-static void c_post_options PARAMS ((void));
-static int c_disregard_inline_limits PARAMS ((tree));
-static int c_cannot_inline_tree_fn PARAMS ((tree *));
+#include "c-pretty-print.h"
+
+static void c_initialize_diagnostics (diagnostic_context *);
+
+enum c_language_kind c_language = clk_c;
+
+/* ### When changing hooks, consider if ObjC needs changing too!! ### */
+
+#undef LANG_HOOKS_NAME
+#define LANG_HOOKS_NAME "GNU C"
+#undef LANG_HOOKS_IDENTIFIER_SIZE
+#define LANG_HOOKS_IDENTIFIER_SIZE C_SIZEOF_STRUCT_LANG_IDENTIFIER
+#undef LANG_HOOKS_INIT
+#define LANG_HOOKS_INIT c_objc_common_init
+#undef LANG_HOOKS_FINISH
+#define LANG_HOOKS_FINISH c_common_finish
+#undef LANG_HOOKS_INIT_OPTIONS
+#define LANG_HOOKS_INIT_OPTIONS c_common_init_options
+#undef LANG_HOOKS_INITIALIZE_DIAGNOSTICS
+#define LANG_HOOKS_INITIALIZE_DIAGNOSTICS c_initialize_diagnostics
+#undef LANG_HOOKS_HANDLE_OPTION
+#define LANG_HOOKS_HANDLE_OPTION c_common_handle_option
+#undef LANG_HOOKS_MISSING_ARGUMENT
+#define LANG_HOOKS_MISSING_ARGUMENT c_common_missing_argument
+#undef LANG_HOOKS_POST_OPTIONS
+#define LANG_HOOKS_POST_OPTIONS c_common_post_options
+#undef LANG_HOOKS_GET_ALIAS_SET
+#define LANG_HOOKS_GET_ALIAS_SET c_common_get_alias_set
+#undef LANG_HOOKS_SAFE_FROM_P
+#define LANG_HOOKS_SAFE_FROM_P c_safe_from_p
+#undef LANG_HOOKS_EXPAND_EXPR
+#define LANG_HOOKS_EXPAND_EXPR c_expand_expr
+#undef LANG_HOOKS_EXPAND_DECL
+#define LANG_HOOKS_EXPAND_DECL c_expand_decl
+#undef LANG_HOOKS_MARK_ADDRESSABLE
+#define LANG_HOOKS_MARK_ADDRESSABLE c_mark_addressable
+#undef LANG_HOOKS_PARSE_FILE
+#define LANG_HOOKS_PARSE_FILE c_common_parse_file
+#undef LANG_HOOKS_CLEAR_BINDING_STACK
+#define LANG_HOOKS_CLEAR_BINDING_STACK lhd_do_nothing
+#undef LANG_HOOKS_TRUTHVALUE_CONVERSION
+#define LANG_HOOKS_TRUTHVALUE_CONVERSION c_objc_common_truthvalue_conversion
+#undef LANG_HOOKS_FINISH_INCOMPLETE_DECL
+#define LANG_HOOKS_FINISH_INCOMPLETE_DECL c_finish_incomplete_decl
+#undef LANG_HOOKS_UNSAFE_FOR_REEVAL
+#define LANG_HOOKS_UNSAFE_FOR_REEVAL c_common_unsafe_for_reeval
+#undef LANG_HOOKS_STATICP
+#define LANG_HOOKS_STATICP c_staticp
+#undef LANG_HOOKS_SET_DECL_ASSEMBLER_NAME
+#define LANG_HOOKS_SET_DECL_ASSEMBLER_NAME c_static_assembler_name
+#undef LANG_HOOKS_NO_BODY_BLOCKS
+#define LANG_HOOKS_NO_BODY_BLOCKS true
+#undef LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL
+#define LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL c_warn_unused_global_decl
+#undef LANG_HOOKS_PRINT_IDENTIFIER
+#define LANG_HOOKS_PRINT_IDENTIFIER c_print_identifier
+#undef LANG_HOOKS_FUNCTION_ENTER_NESTED
+#define LANG_HOOKS_FUNCTION_ENTER_NESTED c_push_function_context
+#undef LANG_HOOKS_FUNCTION_LEAVE_NESTED
+#define LANG_HOOKS_FUNCTION_LEAVE_NESTED c_pop_function_context
+#undef LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P
+#define LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P c_missing_noreturn_ok_p
+#undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
+#define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL c_dup_lang_specific_decl
+
+/* Attribute hooks. */
+#undef LANG_HOOKS_COMMON_ATTRIBUTE_TABLE
+#define LANG_HOOKS_COMMON_ATTRIBUTE_TABLE c_common_attribute_table
+#undef LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE
+#define LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE c_common_format_attribute_table
+
+#undef LANG_HOOKS_TREE_INLINING_WALK_SUBTREES
+#define LANG_HOOKS_TREE_INLINING_WALK_SUBTREES \
+ c_walk_subtrees
+#undef LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN
+#define LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN \
+ c_cannot_inline_tree_fn
+#undef LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS
+#define LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS \
+ c_disregard_inline_limits
+#undef LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P
+#define LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P \
+ c_tree_chain_matters_p
+#undef LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P
+#define LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P \
+ anon_aggr_type_p
+#undef LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING
+#define LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING \
+ c_convert_parm_for_inlining
+#undef LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN
+#define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN c_dump_tree
+
+#undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
+#define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION c_expand_body
+
+#undef LANG_HOOKS_TYPE_FOR_MODE
+#define LANG_HOOKS_TYPE_FOR_MODE c_common_type_for_mode
+#undef LANG_HOOKS_TYPE_FOR_SIZE
+#define LANG_HOOKS_TYPE_FOR_SIZE c_common_type_for_size
+#undef LANG_HOOKS_SIGNED_TYPE
+#define LANG_HOOKS_SIGNED_TYPE c_common_signed_type
+#undef LANG_HOOKS_UNSIGNED_TYPE
+#define LANG_HOOKS_UNSIGNED_TYPE c_common_unsigned_type
+#undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
+#define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE c_common_signed_or_unsigned_type
+#undef LANG_HOOKS_INCOMPLETE_TYPE_ERROR
+#define LANG_HOOKS_INCOMPLETE_TYPE_ERROR c_incomplete_type_error
+#undef LANG_HOOKS_TYPE_PROMOTES_TO
+#define LANG_HOOKS_TYPE_PROMOTES_TO c_type_promotes_to
+#undef LANG_HOOKS_REGISTER_BUILTIN_TYPE
+#define LANG_HOOKS_REGISTER_BUILTIN_TYPE c_register_builtin_type
+
+/* The C front end's scoping structure is very different from
+ that expected by the language-independent code; it is best
+ to disable all of pushlevel, poplevel, set_block, and getdecls.
+ This means it must also provide its own write_globals. */
+
+#undef LANG_HOOKS_PUSHLEVEL
+#define LANG_HOOKS_PUSHLEVEL lhd_do_nothing_i
+#undef LANG_HOOKS_POPLEVEL
+#define LANG_HOOKS_POPLEVEL lhd_do_nothing_iii_return_null_tree
+#undef LANG_HOOKS_SET_BLOCK
+#define LANG_HOOKS_SET_BLOCK lhd_do_nothing_t
+#undef LANG_HOOKS_GETDECLS
+#define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
+#undef LANG_HOOKS_WRITE_GLOBALS
+#define LANG_HOOKS_WRITE_GLOBALS c_write_global_declarations
+
+/* Hooks for tree gimplification. */
+#undef LANG_HOOKS_GIMPLIFY_EXPR
+#define LANG_HOOKS_GIMPLIFY_EXPR c_gimplify_expr
+
+#undef LANG_HOOKS_TYPES_COMPATIBLE_P
+#define LANG_HOOKS_TYPES_COMPATIBLE_P c_types_compatible_p
+
+/* ### When changing hooks, consider if ObjC needs changing too!! ### */
/* Each front end provides its own. */
-struct lang_hooks lang_hooks = {c_init,
- NULL, /* c_finish */
- c_init_options,
- c_decode_option,
- c_post_options};
+const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
-/* Post-switch processing. */
-static void
-c_post_options ()
-{
- cpp_post_options (parse_in);
-
- /* Use tree inlining if possible. Function instrumentation is only
- done in the RTL level, so we disable tree inlining. */
- if (! flag_instrument_function_entry_exit)
- {
- if (!flag_no_inline)
- {
- flag_inline_trees = 1;
- flag_no_inline = 1;
- }
- if (flag_inline_functions)
- {
- flag_inline_trees = 2;
- flag_inline_functions = 0;
- }
- }
-}
+/* Tree code classes. */
-static void
-c_init_options ()
-{
- /* Make identifier nodes long enough for the language-specific slots. */
- set_identifier_size (sizeof (struct lang_identifier));
+#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
- parse_in = cpp_create_reader (ident_hash, CLK_GNUC89);
+const char tree_code_type[] = {
+#include "tree.def"
+ 'x',
+#include "c-common.def"
+};
+#undef DEFTREECODE
- /* Mark as "unspecified". */
- flag_bounds_check = -1;
-}
+/* Table indexed by tree code giving number of expression
+ operands beyond the fixed part of the node structure.
+ Not used for types or decls. */
-static void
-c_init ()
-{
- c_common_lang_init ();
-
- /* If still unspecified, make it match -std=c99
- (allowing for -pedantic-errors). */
- if (mesg_implicit_function_declaration < 0)
- {
- if (flag_isoc99)
- mesg_implicit_function_declaration = flag_pedantic_errors ? 2 : 1;
- else
- mesg_implicit_function_declaration = 0;
- }
-
- save_lang_status = &push_c_function_context;
- restore_lang_status = &pop_c_function_context;
- mark_lang_status = &mark_c_function_context;
- lang_expand_expr = &c_expand_expr;
- lang_safe_from_p = &c_safe_from_p;
- diagnostic_format_decoder (global_dc) = &c_tree_printer;
- lang_expand_decl_stmt = &c_expand_decl_stmt;
- lang_missing_noreturn_ok_p = &c_missing_noreturn_ok_p;
- lang_disregard_inline_limits = &c_disregard_inline_limits;
- lang_cannot_inline_tree_fn = &c_cannot_inline_tree_fn;
-
- c_parse_init ();
-}
+#define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
-const char *
-lang_identify ()
-{
- return "c";
-}
+const unsigned char tree_code_length[] = {
+#include "tree.def"
+ 0,
+#include "c-common.def"
+};
+#undef DEFTREECODE
-void
-print_lang_statistics ()
-{
-}
+/* Names of tree components.
+ Used for printing out the tree and error messages. */
+#define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
-/* used by print-tree.c */
+const char *const tree_code_name[] = {
+#include "tree.def"
+ "@@dummy",
+#include "c-common.def"
+};
+#undef DEFTREECODE
void
-lang_print_xnode (file, node, indent)
- FILE *file ATTRIBUTE_UNUSED;
- tree node ATTRIBUTE_UNUSED;
- int indent ATTRIBUTE_UNUSED;
-{
-}
-
-/* Used by c-lex.c, but only for objc. */
-
-tree
-lookup_interface (arg)
- tree arg ATTRIBUTE_UNUSED;
-{
- return 0;
-}
-
-tree
-is_class_name (arg)
- tree arg ATTRIBUTE_UNUSED;
-{
- return 0;
-}
-
-void
-maybe_objc_check_decl (decl)
- tree decl ATTRIBUTE_UNUSED;
+finish_file (void)
{
+ c_objc_common_finish_file ();
}
int
-maybe_objc_comptypes (lhs, rhs, reflexive)
- tree lhs ATTRIBUTE_UNUSED;
- tree rhs ATTRIBUTE_UNUSED;
- int reflexive ATTRIBUTE_UNUSED;
-{
- return -1;
-}
-
-tree
-maybe_building_objc_message_expr ()
-{
- return 0;
-}
-
-int
-recognize_objc_keyword ()
-{
- return 0;
-}
-
-/* Used by c-typeck.c (build_external_ref), but only for objc. */
-
-tree
-lookup_objc_ivar (id)
- tree id ATTRIBUTE_UNUSED;
+c_types_compatible_p (tree x, tree y)
{
- return 0;
+ return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
}
-
-#if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
-extern tree static_ctors;
-extern tree static_dtors;
-
-static tree start_cdtor PARAMS ((int));
-static void finish_cdtor PARAMS ((tree));
-
-static tree
-start_cdtor (method_type)
- int method_type;
-{
- tree fnname = get_file_function_name (method_type);
- tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node);
- tree body;
-
- start_function (void_list_node_1,
- build_nt (CALL_EXPR, fnname,
- tree_cons (NULL_TREE, NULL_TREE, void_list_node_1),
- NULL_TREE),
- NULL_TREE);
- store_parm_decls ();
-
- current_function_cannot_inline
- = "static constructors and destructors cannot be inlined";
-
- body = c_begin_compound_stmt ();
-
- pushlevel (0);
- clear_last_expr ();
- add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
-
- return body;
-}
-
static void
-finish_cdtor (body)
- tree body;
+c_initialize_diagnostics (diagnostic_context *context)
{
- tree scope;
- tree block;
-
- scope = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
- block = poplevel (0, 0, 0);
- SCOPE_STMT_BLOCK (TREE_PURPOSE (scope)) = block;
- SCOPE_STMT_BLOCK (TREE_VALUE (scope)) = block;
+ pretty_printer *base = context->printer;
+ c_pretty_printer *pp = xmalloc (sizeof (c_pretty_printer));
+ memcpy (pp_base (pp), base, sizeof (pretty_printer));
+ pp_c_pretty_printer_init (pp);
+ context->printer = (pretty_printer *) pp;
- RECHAIN_STMTS (body, COMPOUND_BODY (body));
-
- finish_function (0);
+ /* It is safe to free this object because it was previously malloc()'d. */
+ free (base);
}
-#endif
-
-/* Called at end of parsing, but before end-of-file processing. */
-void
-finish_file ()
-{
-#ifndef ASM_OUTPUT_CONSTRUCTOR
- if (static_ctors)
- {
- tree body = start_cdtor ('I');
-
- for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
- c_expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
- NULL_TREE));
-
- finish_cdtor (body);
- }
-#endif
-#ifndef ASM_OUTPUT_DESTRUCTOR
- if (static_dtors)
- {
- tree body = start_cdtor ('D');
-
- for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
- c_expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
- NULL_TREE));
-
- finish_cdtor (body);
- }
-#endif
-
- if (back_end_hook)
- (*back_end_hook) (getdecls ());
-
- {
- int flags;
- FILE *stream = dump_begin (TDI_all, &flags);
-
- if (stream)
- {
- dump_node (getdecls (), flags & ~TDF_SLIM, stream);
- dump_end (TDI_all, stream);
- }
- }
-}
-
-/* Called during diagnostic message formatting process to print a
- source-level entity onto BUFFER. The meaning of the format specifiers
- is as follows:
- %D: a general decl,
- %F: a function declaration,
- %T: a type.
-
- These format specifiers form a subset of the format specifiers set used
- by the C++ front-end.
- Please notice when called, the `%' part was already skipped by the
- diagnostic machinery. */
-static int
-c_tree_printer (buffer)
- output_buffer *buffer;
-{
- tree t = va_arg (output_buffer_format_args (buffer), tree);
-
- switch (*output_buffer_text_cursor (buffer))
- {
- case 'D':
- case 'F':
- case 'T':
- {
- const char *n = DECL_NAME (t)
- ? (*decl_printable_name) (t, 2)
- : "({anonymous})";
- output_add_string (buffer, n);
- }
- return 1;
-
- default:
- return 0;
- }
-}
-
-static int
-c_missing_noreturn_ok_p (decl)
- tree decl;
-{
- /* A missing noreturn is not ok for freestanding implementations and
- ok for the `main' function in hosted implementations. */
- return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl));
-}
-
-/* We want to inline `extern inline' functions even if this would
- violate inlining limits. Some glibc and linux constructs depend on
- such functions always being inlined when optimizing. */
-
-static int
-c_disregard_inline_limits (fn)
- tree fn;
-{
- return DECL_DECLARED_INLINE_P (fn) && DECL_EXTERNAL (fn);
-}
-
-static tree inline_forbidden_p PARAMS ((tree *, int *, void *));
-
-static tree
-inline_forbidden_p (nodep, walk_subtrees, fn)
- tree *nodep;
- int *walk_subtrees ATTRIBUTE_UNUSED;
- void *fn;
-{
- tree node = *nodep;
- tree t;
-
- switch (TREE_CODE (node))
- {
- case CALL_EXPR:
- t = get_callee_fndecl (node);
-
- if (! t)
- break;
-
- /* We cannot inline functions that call setjmp. */
- if (setjmp_call_p (t))
- return node;
-
- switch (DECL_FUNCTION_CODE (t))
- {
- /* We cannot inline functions that take a variable number of
- arguments. */
- case BUILT_IN_VARARGS_START:
- case BUILT_IN_STDARG_START:
-#if 0
- /* Functions that need information about the address of the
- caller can't (shouldn't?) be inlined. */
- case BUILT_IN_RETURN_ADDRESS:
-#endif
- return node;
-
- default:
- break;
- }
-
- break;
-
- case DECL_STMT:
- /* We cannot inline functions that contain other functions. */
- if (TREE_CODE (TREE_OPERAND (node, 0)) == FUNCTION_DECL
- && DECL_INITIAL (TREE_OPERAND (node, 0)))
- return node;
- break;
-
- case GOTO_STMT:
- case GOTO_EXPR:
- t = TREE_OPERAND (node, 0);
-
- /* We will not inline a function which uses computed goto. The
- addresses of its local labels, which may be tucked into
- global storage, are of course not constant across
- instantiations, which causes unexpected behaviour. */
- if (TREE_CODE (t) != LABEL_DECL)
- return node;
-
- /* We cannot inline a nested function that jumps to a nonlocal
- label. */
- if (TREE_CODE (t) == LABEL_DECL
- && DECL_CONTEXT (t) && DECL_CONTEXT (t) != fn)
- return node;
-
- break;
-
- default:
- break;
- }
-
- return NULL_TREE;
-}
-
-static int
-c_cannot_inline_tree_fn (fnp)
- tree *fnp;
-{
- tree fn = *fnp;
- tree t;
-
- if (! function_attribute_inlinable_p (fn))
- {
- DECL_UNINLINABLE (fn) = 1;
- return 1;
- }
-
- /* If a function has pending sizes, we must not defer its
- compilation, and we can't inline it as a tree. */
- if (fn == current_function_decl)
- {
- t = get_pending_sizes ();
- put_pending_sizes (t);
-
- if (t)
- {
- DECL_UNINLINABLE (fn) = 1;
- return 1;
- }
- }
-
- if (DECL_CONTEXT (fn))
- {
- /* If a nested function has pending sizes, we may have already
- saved them. */
- if (DECL_LANG_SPECIFIC (fn)->pending_sizes)
- {
- DECL_UNINLINABLE (fn) = 1;
- return 1;
- }
- }
- else
- {
- /* We rely on the fact that this function is called upfront,
- just before we start expanding a function. If FN is active
- (i.e., it's the current_function_decl or a parent thereof),
- we have to walk FN's saved tree. Otherwise, we can safely
- assume we have done it before and, if we didn't mark it as
- uninlinable (in which case we wouldn't have been called), it
- is inlinable. Unfortunately, this strategy doesn't work for
- nested functions, because they're only expanded as part of
- their enclosing functions, so the inlinability test comes in
- late. */
- t = current_function_decl;
-
- while (t && t != fn)
- t = DECL_CONTEXT (t);
- if (! t)
- return 0;
- }
-
- if (walk_tree (&DECL_SAVED_TREE (fn), inline_forbidden_p, fn, NULL))
- {
- DECL_UNINLINABLE (fn) = 1;
- return 1;
- }
-
- return 0;
-}
+#include "gtype-c.h"
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