/* Data structure definitions for a generic GCC target.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
/* This is defined in ddg.h . */
struct ddg;
+/* Assembler instructions for creating various kinds of integer object. */
+
+struct asm_int_op
+{
+ const char *hi;
+ const char *si;
+ const char *di;
+ const char *ti;
+};
+
+/* The target structure. This holds all the backend hooks. */
+
struct gcc_target
{
/* Functions that output assembler for the target. */
/* Assembler instructions for creating various kinds of integer object. */
const char *byte_op;
- struct asm_int_op
- {
- const char *hi;
- const char *si;
- const char *di;
- const char *ti;
- } aligned_op, unaligned_op;
+ struct asm_int_op aligned_op, unaligned_op;
/* Try to output the assembler code for an integer object whose
value is given by X. SIZE is the size of the object in bytes and
/* Output a DTP-relative reference to a TLS symbol. */
void (*output_dwarf_dtprel) (FILE *file, int size, rtx x);
+ /* Some target machines need to postscan each insn after it is output. */
+ void (*final_postscan_insn) (FILE *, rtx, rtx *, int);
} asm_out;
/* Functions relating to instruction scheduling. */
/* Target builtin that implements vector permute. */
tree (* builtin_vec_perm) (tree, tree*);
-} vectorize;
+ } vectorize;
/* The initial value of target_flags. */
int default_target_flags;
enum machine_mode mode, int ignore);
/* Select a replacement for a target-specific builtin. This is done
- *before* regular type checking, and so allows the target to implement
- a crude form of function overloading. The result is a complete
- expression that implements the operation. */
- tree (*resolve_overloaded_builtin) (tree decl, tree params);
+ *before* regular type checking, and so allows the target to
+ implement a crude form of function overloading. The result is a
+ complete expression that implements the operation. PARAMS really
+ has type VEC(tree,gc)*, but we don't want to include tree.h
+ here. */
+ tree (*resolve_overloaded_builtin) (unsigned int /*location_t*/,
+ tree decl, void *params);
/* Fold a target-specific builtin. */
tree (* fold_builtin) (tree fndecl, tree arglist, bool ignore);
/* Return a register class for which branch target register
optimizations should be applied. */
- int (* branch_target_register_class) (void);
+ enum reg_class (* branch_target_register_class) (void);
/* Return true if branch target register optimizations should include
callee-saved registers that are not already live during the current
/* True if X is considered to be commutative. */
bool (* commutative_p) (const_rtx, int);
+ /* Given an invalid address X for a given machine mode, try machine-specific
+ ways to make it legitimate. Return X or an invalid address on failure. */
+ rtx (* legitimize_address) (rtx, rtx, enum machine_mode);
+
/* Given an address RTX, undo the effects of LEGITIMIZE_ADDRESS. */
rtx (* delegitimize_address) (rtx);
+ /* Given an address RTX, say whether it is valid. */
+ bool (* legitimate_address_p) (enum machine_mode, rtx, bool);
+
/* True if the given constant can be put into an object_block. */
bool (* use_blocks_for_constant_p) (enum machine_mode, const_rtx);
bool (* in_small_data_p) (const_tree);
/* True if EXP names an object for which name resolution must resolve
- to the current module. */
+ to the current executable or shared library. */
bool (* binds_local_p) (const_tree);
/* Modify and return the identifier of a DECL's external name,
for further details. */
bool (* vector_mode_supported_p) (enum machine_mode mode);
- /* True if a vector is opaque. */
- bool (* vector_opaque_p) (const_tree);
-
/* Compute a (partial) cost for rtx X. Return true if the complete
cost has been computed, and false if subexpressions should be
scanned. In either case, *TOTAL contains the cost result. */
checks to handle_dll_attribute (). */
bool (* valid_dllimport_attribute_p) (const_tree decl);
+ /* If non-zero, align constant anchors in CSE to a multiple of this
+ value. */
+ unsigned HOST_WIDE_INT const_anchor;
+
/* Functions relating to calls - argument passing, returns, etc. */
struct calls {
- bool (*promote_function_args) (const_tree fntype);
- bool (*promote_function_return) (const_tree fntype);
+ enum machine_mode (*promote_function_mode) (const_tree type,
+ enum machine_mode mode,
+ int *punsignedp,
+ const_tree fntype,
+ int for_return);
bool (*promote_prototypes) (const_tree fntype);
rtx (*struct_value_rtx) (tree fndecl, int incoming);
bool (*return_in_memory) (const_tree type, const_tree fndecl);
rtx (*function_value) (const_tree ret_type, const_tree fn_decl_or_type,
bool outgoing);
+ /* Return the rtx for the result of a libcall of mode MODE,
+ calling the function FN_NAME. */
+ rtx (*libcall_value) (enum machine_mode, rtx);
+
/* Return an rtx for the argument pointer incoming to the
current function. */
rtx (*internal_arg_pointer) (void);
is not permitted on TYPE1 and TYPE2, NULL otherwise. */
const char *(*invalid_binary_op) (int op, const_tree type1, const_tree type2);
+ /* Return the diagnostic message string if TYPE is not valid as a
+ function parameter type, NULL otherwise. */
+ const char *(*invalid_parameter_type) (const_tree type);
+
+ /* Return the diagnostic message string if TYPE is not valid as a
+ function return type, NULL otherwise. */
+ const char *(*invalid_return_type) (const_tree type);
+
+ /* If values of TYPE are promoted to some other type when used in
+ expressions (analogous to the integer promotions), return that type,
+ or NULL_TREE otherwise. */
+ tree (*promoted_type) (const_tree type);
+
+ /* Convert EXPR to TYPE, if target-specific types with special conversion
+ rules are involved. Return the converted expression, or NULL to apply
+ the standard conversion rules. */
+ tree (*convert_to_type) (tree type, tree expr);
+
/* Return the array of IRA cover classes for the current target. */
const enum reg_class *(*ira_cover_classes) (void);
in peephole2. */
bool (* hard_regno_scratch_ok) (unsigned int regno);
+ /* Return the smallest number of different values for which it is best to
+ use a jump-table instead of a tree of conditional branches. */
+ unsigned int (* case_values_threshold) (void);
+
+ /* Retutn true if a function must have and use a frame pointer. */
+ bool (* frame_pointer_required) (void);
+
+ /* Returns true if the compiler is allowed to try to replace register number
+ from-reg with register number to-reg. */
+ bool (* can_eliminate) (const int, const int);
+
/* Functions specific to the C family of frontends. */
struct c {
/* Return machine mode for non-standard suffix
at the beginning of assembly output. */
bool file_start_file_directive;
- /* True if #pragma redefine_extname is to be supported. */
- bool handle_pragma_redefine_extname;
-
/* True if #pragma extern_prefix is to be supported. */
bool handle_pragma_extern_prefix;
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