1 /* Default target hook functions.
2 Copyright (C) 2003-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 /* The migration of target macros to target hooks works as follows:
22 1. Create a target hook that uses the existing target macros to
23 implement the same functionality.
25 2. Convert all the MI files to use the hook instead of the macro.
27 3. Repeat for a majority of the remaining target macros. This will
30 4. Tell target maintainers to start migrating.
32 5. Eventually convert the backends to override the hook instead of
33 defining the macros. This will take some time too.
35 6. TBD when, poison the macros. Unmigrated targets will break at
38 Note that we expect steps 1-3 to be done by the people that
39 understand what the MI does with each macro, and step 5 to be done
40 by the target maintainers for their respective targets.
42 Note that steps 1 and 2 don't have to be done together, but no
43 target can override the new hook until step 2 is complete for it.
45 Once the macros are poisoned, we will revert to the old migration
46 rules - migrate the macro, callers, and targets all at once. This
47 comment can thus be removed at that point. */
51 #include "coretypes.h"
56 #include "tree-ssa-alias.h"
57 #include "gimple-expr.h"
59 #include "stringpool.h"
60 #include "tree-ssanames.h"
64 #include "diagnostic-core.h"
65 #include "fold-const.h"
66 #include "stor-layout.h"
80 default_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED
,
81 rtx addr ATTRIBUTE_UNUSED
,
82 bool strict ATTRIBUTE_UNUSED
)
84 #ifdef GO_IF_LEGITIMATE_ADDRESS
85 /* Defer to the old implementation using a goto. */
87 return strict_memory_address_p (mode
, addr
);
89 return memory_address_p (mode
, addr
);
96 default_external_libcall (rtx fun ATTRIBUTE_UNUSED
)
98 #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL
99 ASM_OUTPUT_EXTERNAL_LIBCALL (asm_out_file
, fun
);
104 default_unspec_may_trap_p (const_rtx x
, unsigned flags
)
108 /* Any floating arithmetic may trap. */
109 if ((SCALAR_FLOAT_MODE_P (GET_MODE (x
)) && flag_trapping_math
))
112 for (i
= 0; i
< XVECLEN (x
, 0); ++i
)
114 if (may_trap_p_1 (XVECEXP (x
, 0, i
), flags
))
122 default_promote_function_mode (const_tree type ATTRIBUTE_UNUSED
,
124 int *punsignedp ATTRIBUTE_UNUSED
,
125 const_tree funtype ATTRIBUTE_UNUSED
,
126 int for_return ATTRIBUTE_UNUSED
)
128 if (type
!= NULL_TREE
&& for_return
== 2)
129 return promote_mode (type
, mode
, punsignedp
);
134 default_promote_function_mode_always_promote (const_tree type
,
137 const_tree funtype ATTRIBUTE_UNUSED
,
138 int for_return ATTRIBUTE_UNUSED
)
140 return promote_mode (type
, mode
, punsignedp
);
144 default_cc_modes_compatible (machine_mode m1
, machine_mode m2
)
152 default_return_in_memory (const_tree type
,
153 const_tree fntype ATTRIBUTE_UNUSED
)
155 return (TYPE_MODE (type
) == BLKmode
);
159 default_legitimize_address (rtx x
, rtx orig_x ATTRIBUTE_UNUSED
,
160 machine_mode mode ATTRIBUTE_UNUSED
)
166 default_legitimize_address_displacement (rtx
*disp ATTRIBUTE_UNUSED
,
167 rtx
*offset ATTRIBUTE_UNUSED
,
168 machine_mode mode ATTRIBUTE_UNUSED
)
174 default_expand_builtin_saveregs (void)
176 error ("__builtin_saveregs not supported by this target");
181 default_setup_incoming_varargs (cumulative_args_t ca ATTRIBUTE_UNUSED
,
182 machine_mode mode ATTRIBUTE_UNUSED
,
183 tree type ATTRIBUTE_UNUSED
,
184 int *pretend_arg_size ATTRIBUTE_UNUSED
,
185 int second_time ATTRIBUTE_UNUSED
)
189 /* The default implementation of TARGET_BUILTIN_SETJMP_FRAME_VALUE. */
192 default_builtin_setjmp_frame_value (void)
194 return virtual_stack_vars_rtx
;
197 /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns false. */
200 hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t ca ATTRIBUTE_UNUSED
)
206 default_pretend_outgoing_varargs_named (cumulative_args_t ca ATTRIBUTE_UNUSED
)
208 return (targetm
.calls
.setup_incoming_varargs
209 != default_setup_incoming_varargs
);
213 default_eh_return_filter_mode (void)
215 return targetm
.unwind_word_mode ();
219 default_libgcc_cmp_return_mode (void)
225 default_libgcc_shift_count_mode (void)
231 default_unwind_word_mode (void)
236 /* The default implementation of TARGET_SHIFT_TRUNCATION_MASK. */
238 unsigned HOST_WIDE_INT
239 default_shift_truncation_mask (machine_mode mode
)
241 return SHIFT_COUNT_TRUNCATED
? GET_MODE_BITSIZE (mode
) - 1 : 0;
244 /* The default implementation of TARGET_MIN_DIVISIONS_FOR_RECIP_MUL. */
247 default_min_divisions_for_recip_mul (machine_mode mode ATTRIBUTE_UNUSED
)
249 return have_insn_for (DIV
, mode
) ? 3 : 2;
252 /* The default implementation of TARGET_MODE_REP_EXTENDED. */
255 default_mode_rep_extended (machine_mode mode ATTRIBUTE_UNUSED
,
256 machine_mode mode_rep ATTRIBUTE_UNUSED
)
261 /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns true. */
264 hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t a ATTRIBUTE_UNUSED
)
269 /* Return machine mode for non-standard suffix
270 or VOIDmode if non-standard suffixes are unsupported. */
272 default_mode_for_suffix (char suffix ATTRIBUTE_UNUSED
)
277 /* The generic C++ ABI specifies this is a 64-bit value. */
279 default_cxx_guard_type (void)
281 return long_long_integer_type_node
;
284 /* Returns the size of the cookie to use when allocating an array
285 whose elements have the indicated TYPE. Assumes that it is already
286 known that a cookie is needed. */
289 default_cxx_get_cookie_size (tree type
)
293 /* We need to allocate an additional max (sizeof (size_t), alignof
294 (true_type)) bytes. */
298 sizetype_size
= size_in_bytes (sizetype
);
299 type_align
= size_int (TYPE_ALIGN_UNIT (type
));
300 if (tree_int_cst_lt (type_align
, sizetype_size
))
301 cookie_size
= sizetype_size
;
303 cookie_size
= type_align
;
308 /* Return true if a parameter must be passed by reference. This version
309 of the TARGET_PASS_BY_REFERENCE hook uses just MUST_PASS_IN_STACK. */
312 hook_pass_by_reference_must_pass_in_stack (cumulative_args_t c ATTRIBUTE_UNUSED
,
313 machine_mode mode ATTRIBUTE_UNUSED
, const_tree type ATTRIBUTE_UNUSED
,
314 bool named_arg ATTRIBUTE_UNUSED
)
316 return targetm
.calls
.must_pass_in_stack (mode
, type
);
319 /* Return true if a parameter follows callee copies conventions. This
320 version of the hook is true for all named arguments. */
323 hook_callee_copies_named (cumulative_args_t ca ATTRIBUTE_UNUSED
,
324 machine_mode mode ATTRIBUTE_UNUSED
,
325 const_tree type ATTRIBUTE_UNUSED
, bool named
)
330 /* Emit to STREAM the assembler syntax for insn operand X. */
333 default_print_operand (FILE *stream ATTRIBUTE_UNUSED
, rtx x ATTRIBUTE_UNUSED
,
334 int code ATTRIBUTE_UNUSED
)
337 PRINT_OPERAND (stream
, x
, code
);
343 /* Emit to STREAM the assembler syntax for an insn operand whose memory
347 default_print_operand_address (FILE *stream ATTRIBUTE_UNUSED
,
348 rtx x ATTRIBUTE_UNUSED
)
350 #ifdef PRINT_OPERAND_ADDRESS
351 PRINT_OPERAND_ADDRESS (stream
, x
);
357 /* Return true if CODE is a valid punctuation character for the
358 `print_operand' hook. */
361 default_print_operand_punct_valid_p (unsigned char code ATTRIBUTE_UNUSED
)
363 #ifdef PRINT_OPERAND_PUNCT_VALID_P
364 return PRINT_OPERAND_PUNCT_VALID_P (code
);
370 /* The default implementation of TARGET_MANGLE_ASSEMBLER_NAME. */
372 default_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED
)
374 const char *skipped
= name
+ (*name
== '*' ? 1 : 0);
375 const char *stripped
= targetm
.strip_name_encoding (skipped
);
376 if (*name
!= '*' && user_label_prefix
[0])
377 stripped
= ACONCAT ((user_label_prefix
, stripped
, NULL
));
378 return get_identifier (stripped
);
381 /* True if MODE is valid for the target. By "valid", we mean able to
382 be manipulated in non-trivial ways. In particular, this means all
383 the arithmetic is supported.
385 By default we guess this means that any C type is supported. If
386 we can't map the mode back to a type that would be available in C,
387 then reject it. Special case, here, is the double-word arithmetic
388 supported by optabs.c. */
391 default_scalar_mode_supported_p (machine_mode mode
)
393 int precision
= GET_MODE_PRECISION (mode
);
395 switch (GET_MODE_CLASS (mode
))
397 case MODE_PARTIAL_INT
:
399 if (precision
== CHAR_TYPE_SIZE
)
401 if (precision
== SHORT_TYPE_SIZE
)
403 if (precision
== INT_TYPE_SIZE
)
405 if (precision
== LONG_TYPE_SIZE
)
407 if (precision
== LONG_LONG_TYPE_SIZE
)
409 if (precision
== 2 * BITS_PER_WORD
)
414 if (precision
== FLOAT_TYPE_SIZE
)
416 if (precision
== DOUBLE_TYPE_SIZE
)
418 if (precision
== LONG_DOUBLE_TYPE_SIZE
)
422 case MODE_DECIMAL_FLOAT
:
434 /* Return true if libgcc supports floating-point mode MODE (known to
435 be supported as a scalar mode). */
438 default_libgcc_floating_mode_supported_p (machine_mode mode
)
461 /* Make some target macros useable by target-independent code. */
463 targhook_words_big_endian (void)
465 return !!WORDS_BIG_ENDIAN
;
469 targhook_float_words_big_endian (void)
471 return !!FLOAT_WORDS_BIG_ENDIAN
;
474 /* True if the target supports floating-point exceptions and rounding
478 default_float_exceptions_rounding_supported_p (void)
487 /* True if the target supports decimal floating point. */
490 default_decimal_float_supported_p (void)
492 return ENABLE_DECIMAL_FLOAT
;
495 /* True if the target supports fixed-point arithmetic. */
498 default_fixed_point_supported_p (void)
500 return ENABLE_FIXED_POINT
;
503 /* True if the target supports GNU indirect functions. */
506 default_has_ifunc_p (void)
508 return HAVE_GNU_INDIRECT_FUNCTION
;
511 /* NULL if INSN insn is valid within a low-overhead loop, otherwise returns
514 This function checks whether a given INSN is valid within a low-overhead
515 loop. If INSN is invalid it returns the reason for that, otherwise it
516 returns NULL. A called function may clobber any special registers required
517 for low-overhead looping. Additionally, some targets (eg, PPC) use the count
518 register for branch on table instructions. We reject the doloop pattern in
522 default_invalid_within_doloop (const rtx_insn
*insn
)
525 return "Function call in loop.";
527 if (tablejump_p (insn
, NULL
, NULL
) || computed_jump_p (insn
))
528 return "Computed branch in the loop.";
533 /* Mapping of builtin functions to vectorized variants. */
536 default_builtin_vectorized_function (tree fndecl ATTRIBUTE_UNUSED
,
537 tree type_out ATTRIBUTE_UNUSED
,
538 tree type_in ATTRIBUTE_UNUSED
)
543 /* Vectorized conversion. */
546 default_builtin_vectorized_conversion (unsigned int code ATTRIBUTE_UNUSED
,
547 tree dest_type ATTRIBUTE_UNUSED
,
548 tree src_type ATTRIBUTE_UNUSED
)
553 /* Default vectorizer cost model values. */
556 default_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost
,
558 int misalign ATTRIBUTE_UNUSED
)
562 switch (type_of_cost
)
572 case cond_branch_not_taken
:
574 case vec_promote_demote
:
578 case unaligned_store
:
581 case cond_branch_taken
:
585 elements
= TYPE_VECTOR_SUBPARTS (vectype
);
586 return elements
/ 2 + 1;
596 default_builtin_reciprocal (unsigned int fn ATTRIBUTE_UNUSED
,
597 bool md_fn ATTRIBUTE_UNUSED
,
598 bool sqrt ATTRIBUTE_UNUSED
)
604 hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false (
605 cumulative_args_t ca ATTRIBUTE_UNUSED
,
606 machine_mode mode ATTRIBUTE_UNUSED
,
607 const_tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
613 hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true (
614 cumulative_args_t ca ATTRIBUTE_UNUSED
,
615 machine_mode mode ATTRIBUTE_UNUSED
,
616 const_tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
622 hook_int_CUMULATIVE_ARGS_mode_tree_bool_0 (
623 cumulative_args_t ca ATTRIBUTE_UNUSED
,
624 machine_mode mode ATTRIBUTE_UNUSED
,
625 tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
631 default_function_arg_advance (cumulative_args_t ca ATTRIBUTE_UNUSED
,
632 machine_mode mode ATTRIBUTE_UNUSED
,
633 const_tree type ATTRIBUTE_UNUSED
,
634 bool named ATTRIBUTE_UNUSED
)
640 default_function_arg (cumulative_args_t ca ATTRIBUTE_UNUSED
,
641 machine_mode mode ATTRIBUTE_UNUSED
,
642 const_tree type ATTRIBUTE_UNUSED
,
643 bool named ATTRIBUTE_UNUSED
)
649 default_function_incoming_arg (cumulative_args_t ca ATTRIBUTE_UNUSED
,
650 machine_mode mode ATTRIBUTE_UNUSED
,
651 const_tree type ATTRIBUTE_UNUSED
,
652 bool named ATTRIBUTE_UNUSED
)
658 default_function_arg_boundary (machine_mode mode ATTRIBUTE_UNUSED
,
659 const_tree type ATTRIBUTE_UNUSED
)
661 return PARM_BOUNDARY
;
665 default_function_arg_round_boundary (machine_mode mode ATTRIBUTE_UNUSED
,
666 const_tree type ATTRIBUTE_UNUSED
)
668 return PARM_BOUNDARY
;
672 hook_void_bitmap (bitmap regs ATTRIBUTE_UNUSED
)
677 hook_invalid_arg_for_unprototyped_fn (
678 const_tree typelist ATTRIBUTE_UNUSED
,
679 const_tree funcdecl ATTRIBUTE_UNUSED
,
680 const_tree val ATTRIBUTE_UNUSED
)
685 /* Initialize the stack protection decls. */
687 /* Stack protection related decls living in libgcc. */
688 static GTY(()) tree stack_chk_guard_decl
;
691 default_stack_protect_guard (void)
693 tree t
= stack_chk_guard_decl
;
699 t
= build_decl (UNKNOWN_LOCATION
,
700 VAR_DECL
, get_identifier ("__stack_chk_guard"),
704 DECL_EXTERNAL (t
) = 1;
706 TREE_THIS_VOLATILE (t
) = 1;
707 DECL_ARTIFICIAL (t
) = 1;
708 DECL_IGNORED_P (t
) = 1;
710 /* Do not share RTL as the declaration is visible outside of
713 RTX_FLAG (x
, used
) = 1;
715 stack_chk_guard_decl
= t
;
721 static GTY(()) tree stack_chk_fail_decl
;
724 default_external_stack_protect_fail (void)
726 tree t
= stack_chk_fail_decl
;
730 t
= build_function_type_list (void_type_node
, NULL_TREE
);
731 t
= build_decl (UNKNOWN_LOCATION
,
732 FUNCTION_DECL
, get_identifier ("__stack_chk_fail"), t
);
735 DECL_EXTERNAL (t
) = 1;
737 TREE_THIS_VOLATILE (t
) = 1;
738 TREE_NOTHROW (t
) = 1;
739 DECL_ARTIFICIAL (t
) = 1;
740 DECL_IGNORED_P (t
) = 1;
741 DECL_VISIBILITY (t
) = VISIBILITY_DEFAULT
;
742 DECL_VISIBILITY_SPECIFIED (t
) = 1;
744 stack_chk_fail_decl
= t
;
747 return build_call_expr (t
, 0);
751 default_hidden_stack_protect_fail (void)
753 #ifndef HAVE_GAS_HIDDEN
754 return default_external_stack_protect_fail ();
756 tree t
= stack_chk_fail_decl
;
759 return default_external_stack_protect_fail ();
763 t
= build_function_type_list (void_type_node
, NULL_TREE
);
764 t
= build_decl (UNKNOWN_LOCATION
, FUNCTION_DECL
,
765 get_identifier ("__stack_chk_fail_local"), t
);
768 DECL_EXTERNAL (t
) = 1;
770 TREE_THIS_VOLATILE (t
) = 1;
771 TREE_NOTHROW (t
) = 1;
772 DECL_ARTIFICIAL (t
) = 1;
773 DECL_IGNORED_P (t
) = 1;
774 DECL_VISIBILITY_SPECIFIED (t
) = 1;
775 DECL_VISIBILITY (t
) = VISIBILITY_HIDDEN
;
777 stack_chk_fail_decl
= t
;
780 return build_call_expr (t
, 0);
785 hook_bool_const_rtx_commutative_p (const_rtx x
,
786 int outer_code ATTRIBUTE_UNUSED
)
788 return COMMUTATIVE_P (x
);
792 default_function_value (const_tree ret_type ATTRIBUTE_UNUSED
,
793 const_tree fn_decl_or_type
,
794 bool outgoing ATTRIBUTE_UNUSED
)
796 /* The old interface doesn't handle receiving the function type. */
798 && !DECL_P (fn_decl_or_type
))
799 fn_decl_or_type
= NULL
;
801 #ifdef FUNCTION_VALUE
802 return FUNCTION_VALUE (ret_type
, fn_decl_or_type
);
809 default_libcall_value (machine_mode mode ATTRIBUTE_UNUSED
,
810 const_rtx fun ATTRIBUTE_UNUSED
)
813 return LIBCALL_VALUE (mode
);
819 /* The default hook for TARGET_FUNCTION_VALUE_REGNO_P. */
822 default_function_value_regno_p (const unsigned int regno ATTRIBUTE_UNUSED
)
824 #ifdef FUNCTION_VALUE_REGNO_P
825 return FUNCTION_VALUE_REGNO_P (regno
);
832 default_internal_arg_pointer (void)
834 /* If the reg that the virtual arg pointer will be translated into is
835 not a fixed reg or is the stack pointer, make a copy of the virtual
836 arg pointer, and address parms via the copy. The frame pointer is
837 considered fixed even though it is not marked as such. */
838 if ((ARG_POINTER_REGNUM
== STACK_POINTER_REGNUM
839 || ! (fixed_regs
[ARG_POINTER_REGNUM
]
840 || ARG_POINTER_REGNUM
== FRAME_POINTER_REGNUM
)))
841 return copy_to_reg (virtual_incoming_args_rtx
);
843 return virtual_incoming_args_rtx
;
847 default_static_chain (const_tree
ARG_UNUSED (fndecl_or_type
), bool incoming_p
)
851 #ifdef STATIC_CHAIN_INCOMING_REGNUM
852 return gen_rtx_REG (Pmode
, STATIC_CHAIN_INCOMING_REGNUM
);
856 #ifdef STATIC_CHAIN_REGNUM
857 return gen_rtx_REG (Pmode
, STATIC_CHAIN_REGNUM
);
861 static bool issued_error
;
865 sorry ("nested functions not supported on this target");
868 /* It really doesn't matter what we return here, so long at it
869 doesn't cause the rest of the compiler to crash. */
870 return gen_rtx_MEM (Pmode
, stack_pointer_rtx
);
875 default_trampoline_init (rtx
ARG_UNUSED (m_tramp
), tree
ARG_UNUSED (t_func
),
876 rtx
ARG_UNUSED (r_chain
))
878 sorry ("nested function trampolines not supported on this target");
882 default_return_pops_args (tree fundecl ATTRIBUTE_UNUSED
,
883 tree funtype ATTRIBUTE_UNUSED
,
884 int size ATTRIBUTE_UNUSED
)
890 default_branch_target_register_class (void)
896 default_ira_change_pseudo_allocno_class (int regno ATTRIBUTE_UNUSED
,
909 default_register_priority (int hard_regno ATTRIBUTE_UNUSED
)
915 default_register_usage_leveling_p (void)
921 default_different_addr_displacement_p (void)
927 default_secondary_reload (bool in_p ATTRIBUTE_UNUSED
, rtx x ATTRIBUTE_UNUSED
,
928 reg_class_t reload_class_i ATTRIBUTE_UNUSED
,
929 machine_mode reload_mode ATTRIBUTE_UNUSED
,
930 secondary_reload_info
*sri
)
932 enum reg_class rclass
= NO_REGS
;
933 enum reg_class reload_class
= (enum reg_class
) reload_class_i
;
935 if (sri
->prev_sri
&& sri
->prev_sri
->t_icode
!= CODE_FOR_nothing
)
937 sri
->icode
= sri
->prev_sri
->t_icode
;
940 #ifdef SECONDARY_INPUT_RELOAD_CLASS
942 rclass
= SECONDARY_INPUT_RELOAD_CLASS (reload_class
, reload_mode
, x
);
944 #ifdef SECONDARY_OUTPUT_RELOAD_CLASS
946 rclass
= SECONDARY_OUTPUT_RELOAD_CLASS (reload_class
, reload_mode
, x
);
948 if (rclass
!= NO_REGS
)
951 = direct_optab_handler (in_p
? reload_in_optab
: reload_out_optab
,
954 if (icode
!= CODE_FOR_nothing
955 && !insn_operand_matches (icode
, in_p
, x
))
956 icode
= CODE_FOR_nothing
;
957 else if (icode
!= CODE_FOR_nothing
)
959 const char *insn_constraint
, *scratch_constraint
;
960 enum reg_class insn_class
, scratch_class
;
962 gcc_assert (insn_data
[(int) icode
].n_operands
== 3);
963 insn_constraint
= insn_data
[(int) icode
].operand
[!in_p
].constraint
;
964 if (!*insn_constraint
)
965 insn_class
= ALL_REGS
;
970 gcc_assert (*insn_constraint
== '=');
973 insn_class
= (reg_class_for_constraint
974 (lookup_constraint (insn_constraint
)));
975 gcc_assert (insn_class
!= NO_REGS
);
978 scratch_constraint
= insn_data
[(int) icode
].operand
[2].constraint
;
979 /* The scratch register's constraint must start with "=&",
980 except for an input reload, where only "=" is necessary,
981 and where it might be beneficial to re-use registers from
983 gcc_assert (scratch_constraint
[0] == '='
984 && (in_p
|| scratch_constraint
[1] == '&'));
985 scratch_constraint
++;
986 if (*scratch_constraint
== '&')
987 scratch_constraint
++;
988 scratch_class
= (reg_class_for_constraint
989 (lookup_constraint (scratch_constraint
)));
991 if (reg_class_subset_p (reload_class
, insn_class
))
993 gcc_assert (scratch_class
== rclass
);
1000 if (rclass
== NO_REGS
)
1003 sri
->t_icode
= icode
;
1008 /* By default, if flag_pic is true, then neither local nor global relocs
1009 should be placed in readonly memory. */
1012 default_reloc_rw_mask (void)
1014 return flag_pic
? 3 : 0;
1017 /* By default, do no modification. */
1018 tree
default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED
,
1024 /* Default to natural alignment for vector types. */
1026 default_vector_alignment (const_tree type
)
1028 return tree_to_shwi (TYPE_SIZE (type
));
1032 default_builtin_vector_alignment_reachable (const_tree type
, bool is_packed
)
1037 /* Assuming that types whose size is > pointer-size are not guaranteed to be
1038 naturally aligned. */
1039 if (tree_int_cst_compare (TYPE_SIZE (type
), bitsize_int (POINTER_SIZE
)) > 0)
1042 /* Assuming that types whose size is <= pointer-size
1043 are naturally aligned. */
1047 /* By default, assume that a target supports any factor of misalignment
1048 memory access if it supports movmisalign patten.
1049 is_packed is true if the memory access is defined in a packed struct. */
1051 default_builtin_support_vector_misalignment (machine_mode mode
,
1059 if (optab_handler (movmisalign_optab
, mode
) != CODE_FOR_nothing
)
1064 /* By default, only attempt to parallelize bitwise operations, and
1065 possibly adds/subtracts using bit-twiddling. */
1068 default_preferred_simd_mode (machine_mode mode ATTRIBUTE_UNUSED
)
1073 /* By default only the size derived from the preferred vector mode
1077 default_autovectorize_vector_sizes (void)
1082 /* By defaults a vector of integers is used as a mask. */
1085 default_get_mask_mode (unsigned nunits
, unsigned vector_size
)
1087 unsigned elem_size
= vector_size
/ nunits
;
1088 machine_mode elem_mode
1089 = smallest_mode_for_size (elem_size
* BITS_PER_UNIT
, MODE_INT
);
1091 gcc_assert (elem_size
* nunits
== vector_size
);
1093 return mode_for_vector (elem_mode
, nunits
);
1096 /* By default, the cost model accumulates three separate costs (prologue,
1097 loop body, and epilogue) for a vectorized loop or block. So allocate an
1098 array of three unsigned ints, set it to zero, and return its address. */
1101 default_init_cost (struct loop
*loop_info ATTRIBUTE_UNUSED
)
1103 unsigned *cost
= XNEWVEC (unsigned, 3);
1104 cost
[vect_prologue
] = cost
[vect_body
] = cost
[vect_epilogue
] = 0;
1108 /* By default, the cost model looks up the cost of the given statement
1109 kind and mode, multiplies it by the occurrence count, accumulates
1110 it into the cost specified by WHERE, and returns the cost added. */
1113 default_add_stmt_cost (void *data
, int count
, enum vect_cost_for_stmt kind
,
1114 struct _stmt_vec_info
*stmt_info
, int misalign
,
1115 enum vect_cost_model_location where
)
1117 unsigned *cost
= (unsigned *) data
;
1118 unsigned retval
= 0;
1120 tree vectype
= stmt_info
? stmt_vectype (stmt_info
) : NULL_TREE
;
1121 int stmt_cost
= targetm
.vectorize
.builtin_vectorization_cost (kind
, vectype
,
1123 /* Statements in an inner loop relative to the loop being
1124 vectorized are weighted more heavily. The value here is
1125 arbitrary and could potentially be improved with analysis. */
1126 if (where
== vect_body
&& stmt_info
&& stmt_in_inner_loop_p (stmt_info
))
1127 count
*= 50; /* FIXME. */
1129 retval
= (unsigned) (count
* stmt_cost
);
1130 cost
[where
] += retval
;
1135 /* By default, the cost model just returns the accumulated costs. */
1138 default_finish_cost (void *data
, unsigned *prologue_cost
,
1139 unsigned *body_cost
, unsigned *epilogue_cost
)
1141 unsigned *cost
= (unsigned *) data
;
1142 *prologue_cost
= cost
[vect_prologue
];
1143 *body_cost
= cost
[vect_body
];
1144 *epilogue_cost
= cost
[vect_epilogue
];
1147 /* Free the cost data. */
1150 default_destroy_cost_data (void *data
)
1155 /* Determine whether or not a pointer mode is valid. Assume defaults
1156 of ptr_mode or Pmode - can be overridden. */
1158 default_valid_pointer_mode (machine_mode mode
)
1160 return (mode
== ptr_mode
|| mode
== Pmode
);
1163 /* Determine whether the memory reference specified by REF may alias
1164 the C libraries errno location. */
1166 default_ref_may_alias_errno (ao_ref
*ref
)
1168 tree base
= ao_ref_base (ref
);
1169 /* The default implementation assumes the errno location is
1170 a declaration of type int or is always accessed via a
1171 pointer to int. We assume that accesses to errno are
1172 not deliberately obfuscated (even in conforming ways). */
1173 if (TYPE_UNSIGNED (TREE_TYPE (base
))
1174 || TYPE_MODE (TREE_TYPE (base
)) != TYPE_MODE (integer_type_node
))
1176 /* The default implementation assumes an errno location
1177 declaration is never defined in the current compilation unit. */
1179 && !TREE_STATIC (base
))
1181 else if (TREE_CODE (base
) == MEM_REF
1182 && TREE_CODE (TREE_OPERAND (base
, 0)) == SSA_NAME
)
1184 struct ptr_info_def
*pi
= SSA_NAME_PTR_INFO (TREE_OPERAND (base
, 0));
1185 return !pi
|| pi
->pt
.anything
|| pi
->pt
.nonlocal
;
1190 /* Return the mode for a pointer to a given ADDRSPACE,
1191 defaulting to ptr_mode for all address spaces. */
1194 default_addr_space_pointer_mode (addr_space_t addrspace ATTRIBUTE_UNUSED
)
1199 /* Return the mode for an address in a given ADDRSPACE,
1200 defaulting to Pmode for all address spaces. */
1203 default_addr_space_address_mode (addr_space_t addrspace ATTRIBUTE_UNUSED
)
1208 /* Named address space version of valid_pointer_mode.
1209 To match the above, the same modes apply to all address spaces. */
1212 default_addr_space_valid_pointer_mode (machine_mode mode
,
1213 addr_space_t as ATTRIBUTE_UNUSED
)
1215 return targetm
.valid_pointer_mode (mode
);
1218 /* Some places still assume that all pointer or address modes are the
1219 standard Pmode and ptr_mode. These optimizations become invalid if
1220 the target actually supports multiple different modes. For now,
1221 we disable such optimizations on such targets, using this function. */
1224 target_default_pointer_address_modes_p (void)
1226 if (targetm
.addr_space
.address_mode
!= default_addr_space_address_mode
)
1228 if (targetm
.addr_space
.pointer_mode
!= default_addr_space_pointer_mode
)
1234 /* Named address space version of legitimate_address_p.
1235 By default, all address spaces have the same form. */
1238 default_addr_space_legitimate_address_p (machine_mode mode
, rtx mem
,
1240 addr_space_t as ATTRIBUTE_UNUSED
)
1242 return targetm
.legitimate_address_p (mode
, mem
, strict
);
1245 /* Named address space version of LEGITIMIZE_ADDRESS.
1246 By default, all address spaces have the same form. */
1249 default_addr_space_legitimize_address (rtx x
, rtx oldx
, machine_mode mode
,
1250 addr_space_t as ATTRIBUTE_UNUSED
)
1252 return targetm
.legitimize_address (x
, oldx
, mode
);
1255 /* The default hook for determining if one named address space is a subset of
1256 another and to return which address space to use as the common address
1260 default_addr_space_subset_p (addr_space_t subset
, addr_space_t superset
)
1262 return (subset
== superset
);
1265 /* The default hook for TARGET_ADDR_SPACE_CONVERT. This hook should never be
1266 called for targets with only a generic address space. */
1269 default_addr_space_convert (rtx op ATTRIBUTE_UNUSED
,
1270 tree from_type ATTRIBUTE_UNUSED
,
1271 tree to_type ATTRIBUTE_UNUSED
)
1277 default_hard_regno_scratch_ok (unsigned int regno ATTRIBUTE_UNUSED
)
1282 /* The default implementation of TARGET_MODE_DEPENDENT_ADDRESS_P. */
1285 default_mode_dependent_address_p (const_rtx addr ATTRIBUTE_UNUSED
,
1286 addr_space_t addrspace ATTRIBUTE_UNUSED
)
1292 default_target_option_valid_attribute_p (tree
ARG_UNUSED (fndecl
),
1293 tree
ARG_UNUSED (name
),
1294 tree
ARG_UNUSED (args
),
1295 int ARG_UNUSED (flags
))
1297 warning (OPT_Wattributes
,
1298 "target attribute is not supported on this machine");
1304 default_target_option_pragma_parse (tree
ARG_UNUSED (args
),
1305 tree
ARG_UNUSED (pop_target
))
1307 /* If args is NULL the caller is handle_pragma_pop_options (). In that case,
1308 emit no warning because "#pragma GCC pop_target" is valid on targets that
1309 do not have the "target" pragma. */
1311 warning (OPT_Wpragmas
,
1312 "#pragma GCC target is not supported for this machine");
1318 default_target_can_inline_p (tree caller
, tree callee
)
1321 tree callee_opts
= DECL_FUNCTION_SPECIFIC_TARGET (callee
);
1322 tree caller_opts
= DECL_FUNCTION_SPECIFIC_TARGET (caller
);
1324 /* If callee has no option attributes, then it is ok to inline */
1328 /* If caller has no option attributes, but callee does then it is not ok to
1330 else if (!caller_opts
)
1333 /* If both caller and callee have attributes, assume that if the
1334 pointer is different, the two functions have different target
1335 options since build_target_option_node uses a hash table for the
1338 ret
= (callee_opts
== caller_opts
);
1343 /* If the machine does not have a case insn that compares the bounds,
1344 this means extra overhead for dispatch tables, which raises the
1345 threshold for using them. */
1348 default_case_values_threshold (void)
1350 return (targetm
.have_casesi () ? 4 : 5);
1354 default_have_conditional_execution (void)
1356 return HAVE_conditional_execution
;
1359 /* By default we assume that c99 functions are present at the runtime,
1360 but sincos is not. */
1362 default_libc_has_function (enum function_class fn_class
)
1364 if (fn_class
== function_c94
1365 || fn_class
== function_c99_misc
1366 || fn_class
== function_c99_math_complex
)
1373 gnu_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED
)
1379 no_c99_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED
)
1385 default_builtin_tm_load_store (tree
ARG_UNUSED (type
))
1390 /* Compute cost of moving registers to/from memory. */
1393 default_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED
,
1394 reg_class_t rclass ATTRIBUTE_UNUSED
,
1395 bool in ATTRIBUTE_UNUSED
)
1397 #ifndef MEMORY_MOVE_COST
1398 return (4 + memory_move_secondary_cost (mode
, (enum reg_class
) rclass
, in
));
1400 return MEMORY_MOVE_COST (mode
, (enum reg_class
) rclass
, in
);
1404 /* Compute cost of moving data from a register of class FROM to one of
1408 default_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED
,
1409 reg_class_t from ATTRIBUTE_UNUSED
,
1410 reg_class_t to ATTRIBUTE_UNUSED
)
1412 #ifndef REGISTER_MOVE_COST
1415 return REGISTER_MOVE_COST (mode
, (enum reg_class
) from
, (enum reg_class
) to
);
1419 /* For hooks which use the MOVE_RATIO macro, this gives the legacy default
1420 behaviour. SPEED_P is true if we are compiling for speed. */
1423 get_move_ratio (bool speed_p ATTRIBUTE_UNUSED
)
1425 unsigned int move_ratio
;
1427 move_ratio
= (unsigned int) MOVE_RATIO (speed_p
);
1429 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1431 #else /* No movmem patterns, pick a default. */
1432 move_ratio
= ((speed_p
) ? 15 : 3);
1438 /* Return TRUE if the move_by_pieces/set_by_pieces infrastructure should be
1439 used; return FALSE if the movmem/setmem optab should be expanded, or
1440 a call to memcpy emitted. */
1443 default_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size
,
1444 unsigned int alignment
,
1445 enum by_pieces_operation op
,
1448 unsigned int max_size
= 0;
1449 unsigned int ratio
= 0;
1453 case CLEAR_BY_PIECES
:
1454 max_size
= STORE_MAX_PIECES
;
1455 ratio
= CLEAR_RATIO (speed_p
);
1457 case MOVE_BY_PIECES
:
1458 max_size
= MOVE_MAX_PIECES
;
1459 ratio
= get_move_ratio (speed_p
);
1462 max_size
= STORE_MAX_PIECES
;
1463 ratio
= SET_RATIO (speed_p
);
1465 case STORE_BY_PIECES
:
1466 max_size
= STORE_MAX_PIECES
;
1467 ratio
= get_move_ratio (speed_p
);
1471 return move_by_pieces_ninsns (size
, alignment
, max_size
+ 1) < ratio
;
1475 default_profile_before_prologue (void)
1477 #ifdef PROFILE_BEFORE_PROLOGUE
1484 /* The default implementation of TARGET_PREFERRED_RELOAD_CLASS. */
1487 default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED
,
1490 #ifdef PREFERRED_RELOAD_CLASS
1491 return (reg_class_t
) PREFERRED_RELOAD_CLASS (x
, (enum reg_class
) rclass
);
1497 /* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS. */
1500 default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED
,
1506 /* The default implementation of TARGET_PREFERRED_RENAME_CLASS. */
1508 default_preferred_rename_class (reg_class_t rclass ATTRIBUTE_UNUSED
)
1513 /* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P. */
1516 default_class_likely_spilled_p (reg_class_t rclass
)
1518 return (reg_class_size
[(int) rclass
] == 1);
1521 /* The default implementation of TARGET_CLASS_MAX_NREGS. */
1524 default_class_max_nregs (reg_class_t rclass ATTRIBUTE_UNUSED
,
1525 machine_mode mode ATTRIBUTE_UNUSED
)
1527 #ifdef CLASS_MAX_NREGS
1528 return (unsigned char) CLASS_MAX_NREGS ((enum reg_class
) rclass
, mode
);
1530 return ((GET_MODE_SIZE (mode
) + UNITS_PER_WORD
- 1) / UNITS_PER_WORD
);
1534 /* Determine the debugging unwind mechanism for the target. */
1536 enum unwind_info_type
1537 default_debug_unwind_info (void)
1539 /* If the target wants to force the use of dwarf2 unwind info, let it. */
1540 /* ??? Change all users to the hook, then poison this. */
1541 #ifdef DWARF2_FRAME_INFO
1542 if (DWARF2_FRAME_INFO
)
1546 /* Otherwise, only turn it on if dwarf2 debugging is enabled. */
1547 #ifdef DWARF2_DEBUGGING_INFO
1548 if (write_symbols
== DWARF2_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1555 /* Determine the correct mode for a Dwarf frame register that represents
1559 default_dwarf_frame_reg_mode (int regno
)
1561 machine_mode save_mode
= reg_raw_mode
[regno
];
1563 if (HARD_REGNO_CALL_PART_CLOBBERED (regno
, save_mode
))
1564 save_mode
= choose_hard_reg_mode (regno
, 1, true);
1568 /* To be used by targets where reg_raw_mode doesn't return the right
1569 mode for registers used in apply_builtin_return and apply_builtin_arg. */
1572 default_get_reg_raw_mode (int regno
)
1574 return reg_raw_mode
[regno
];
1577 /* Return true if a leaf function should stay leaf even with profiling
1581 default_keep_leaf_when_profiled ()
1586 /* Return true if the state of option OPTION should be stored in PCH files
1587 and checked by default_pch_valid_p. Store the option's current state
1591 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1593 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1595 if ((cl_options
[option
].flags
& CL_PCH_IGNORE
) != 0)
1597 if (option_flag_var (option
, &global_options
) == &target_flags
)
1598 if (targetm
.check_pch_target_flags
)
1600 return get_option_state (&global_options
, option
, state
);
1603 /* Default version of get_pch_validity.
1604 By default, every flag difference is fatal; that will be mostly right for
1605 most targets, but completely right for very few. */
1608 default_get_pch_validity (size_t *sz
)
1610 struct cl_option_state state
;
1615 if (targetm
.check_pch_target_flags
)
1616 *sz
+= sizeof (target_flags
);
1617 for (i
= 0; i
< cl_options_count
; i
++)
1618 if (option_affects_pch_p (i
, &state
))
1621 result
= r
= XNEWVEC (char, *sz
);
1625 if (targetm
.check_pch_target_flags
)
1627 memcpy (r
, &target_flags
, sizeof (target_flags
));
1628 r
+= sizeof (target_flags
);
1631 for (i
= 0; i
< cl_options_count
; i
++)
1632 if (option_affects_pch_p (i
, &state
))
1634 memcpy (r
, state
.data
, state
.size
);
1641 /* Return a message which says that a PCH file was created with a different
1642 setting of OPTION. */
1645 pch_option_mismatch (const char *option
)
1647 return xasprintf (_("created and used with differing settings of '%s'"),
1651 /* Default version of pch_valid_p. */
1654 default_pch_valid_p (const void *data_p
, size_t len
)
1656 struct cl_option_state state
;
1657 const char *data
= (const char *)data_p
;
1660 /* -fpic and -fpie also usually make a PCH invalid. */
1661 if (data
[0] != flag_pic
)
1662 return _("created and used with different settings of -fpic");
1663 if (data
[1] != flag_pie
)
1664 return _("created and used with different settings of -fpie");
1667 /* Check target_flags. */
1668 if (targetm
.check_pch_target_flags
)
1673 memcpy (&tf
, data
, sizeof (target_flags
));
1674 data
+= sizeof (target_flags
);
1675 len
-= sizeof (target_flags
);
1676 r
= targetm
.check_pch_target_flags (tf
);
1681 for (i
= 0; i
< cl_options_count
; i
++)
1682 if (option_affects_pch_p (i
, &state
))
1684 if (memcmp (data
, state
.data
, state
.size
) != 0)
1685 return pch_option_mismatch (cl_options
[i
].opt_text
);
1693 /* Default version of cstore_mode. */
1696 default_cstore_mode (enum insn_code icode
)
1698 return insn_data
[(int) icode
].operand
[0].mode
;
1701 /* Default version of member_type_forces_blk. */
1704 default_member_type_forces_blk (const_tree
, machine_mode
)
1710 default_load_bounds_for_arg (rtx addr ATTRIBUTE_UNUSED
,
1711 rtx ptr ATTRIBUTE_UNUSED
,
1712 rtx bnd ATTRIBUTE_UNUSED
)
1718 default_store_bounds_for_arg (rtx val ATTRIBUTE_UNUSED
,
1719 rtx addr ATTRIBUTE_UNUSED
,
1720 rtx bounds ATTRIBUTE_UNUSED
,
1721 rtx to ATTRIBUTE_UNUSED
)
1727 default_load_returned_bounds (rtx slot ATTRIBUTE_UNUSED
)
1733 default_store_returned_bounds (rtx slot ATTRIBUTE_UNUSED
,
1734 rtx bounds ATTRIBUTE_UNUSED
)
1739 /* Default version of canonicalize_comparison. */
1742 default_canonicalize_comparison (int *, rtx
*, rtx
*, bool)
1746 /* Default implementation of TARGET_ATOMIC_ASSIGN_EXPAND_FENV. */
1749 default_atomic_assign_expand_fenv (tree
*, tree
*, tree
*)
1753 #ifndef PAD_VARARGS_DOWN
1754 #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN
1757 /* Build an indirect-ref expression over the given TREE, which represents a
1758 piece of a va_arg() expansion. */
1760 build_va_arg_indirect_ref (tree addr
)
1762 addr
= build_simple_mem_ref_loc (EXPR_LOCATION (addr
), addr
);
1766 /* The "standard" implementation of va_arg: read the value from the
1767 current (padded) address and increment by the (padded) size. */
1770 std_gimplify_va_arg_expr (tree valist
, tree type
, gimple_seq
*pre_p
,
1773 tree addr
, t
, type_size
, rounded_size
, valist_tmp
;
1774 unsigned HOST_WIDE_INT align
, boundary
;
1777 /* All of the alignment and movement below is for args-grow-up machines.
1778 As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all
1779 implement their own specialized gimplify_va_arg_expr routines. */
1780 if (ARGS_GROW_DOWNWARD
)
1783 indirect
= pass_by_reference (NULL
, TYPE_MODE (type
), type
, false);
1785 type
= build_pointer_type (type
);
1787 align
= PARM_BOUNDARY
/ BITS_PER_UNIT
;
1788 boundary
= targetm
.calls
.function_arg_boundary (TYPE_MODE (type
), type
);
1790 /* When we align parameter on stack for caller, if the parameter
1791 alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be
1792 aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee
1793 here with caller. */
1794 if (boundary
> MAX_SUPPORTED_STACK_ALIGNMENT
)
1795 boundary
= MAX_SUPPORTED_STACK_ALIGNMENT
;
1797 boundary
/= BITS_PER_UNIT
;
1799 /* Hoist the valist value into a temporary for the moment. */
1800 valist_tmp
= get_initialized_tmp_var (valist
, pre_p
, NULL
);
1802 /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually
1803 requires greater alignment, we must perform dynamic alignment. */
1804 if (boundary
> align
1805 && !integer_zerop (TYPE_SIZE (type
)))
1807 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist_tmp
,
1808 fold_build_pointer_plus_hwi (valist_tmp
, boundary
- 1));
1809 gimplify_and_add (t
, pre_p
);
1811 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist_tmp
,
1812 fold_build2 (BIT_AND_EXPR
, TREE_TYPE (valist
),
1814 build_int_cst (TREE_TYPE (valist
), -boundary
)));
1815 gimplify_and_add (t
, pre_p
);
1820 /* If the actual alignment is less than the alignment of the type,
1821 adjust the type accordingly so that we don't assume strict alignment
1822 when dereferencing the pointer. */
1823 boundary
*= BITS_PER_UNIT
;
1824 if (boundary
< TYPE_ALIGN (type
))
1826 type
= build_variant_type_copy (type
);
1827 TYPE_ALIGN (type
) = boundary
;
1830 /* Compute the rounded size of the type. */
1831 type_size
= size_in_bytes (type
);
1832 rounded_size
= round_up (type_size
, align
);
1834 /* Reduce rounded_size so it's sharable with the postqueue. */
1835 gimplify_expr (&rounded_size
, pre_p
, post_p
, is_gimple_val
, fb_rvalue
);
1839 if (PAD_VARARGS_DOWN
&& !integer_zerop (rounded_size
))
1841 /* Small args are padded downward. */
1842 t
= fold_build2_loc (input_location
, GT_EXPR
, sizetype
,
1843 rounded_size
, size_int (align
));
1844 t
= fold_build3 (COND_EXPR
, sizetype
, t
, size_zero_node
,
1845 size_binop (MINUS_EXPR
, rounded_size
, type_size
));
1846 addr
= fold_build_pointer_plus (addr
, t
);
1849 /* Compute new value for AP. */
1850 t
= fold_build_pointer_plus (valist_tmp
, rounded_size
);
1851 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist
, t
);
1852 gimplify_and_add (t
, pre_p
);
1854 addr
= fold_convert (build_pointer_type (type
), addr
);
1857 addr
= build_va_arg_indirect_ref (addr
);
1859 return build_va_arg_indirect_ref (addr
);
1863 default_chkp_bound_type (void)
1865 tree res
= make_node (POINTER_BOUNDS_TYPE
);
1866 TYPE_PRECISION (res
) = TYPE_PRECISION (size_type_node
) * 2;
1867 TYPE_NAME (res
) = get_identifier ("__bounds_type");
1868 SET_TYPE_MODE (res
, targetm
.chkp_bound_mode ());
1874 default_chkp_bound_mode (void)
1880 default_builtin_chkp_function (unsigned int fcode ATTRIBUTE_UNUSED
)
1886 default_chkp_function_value_bounds (const_tree ret_type ATTRIBUTE_UNUSED
,
1887 const_tree fn_decl_or_type ATTRIBUTE_UNUSED
,
1888 bool outgoing ATTRIBUTE_UNUSED
)
1894 default_chkp_make_bounds_constant (HOST_WIDE_INT lb ATTRIBUTE_UNUSED
,
1895 HOST_WIDE_INT ub ATTRIBUTE_UNUSED
)
1901 default_chkp_initialize_bounds (tree var ATTRIBUTE_UNUSED
,
1902 tree lb ATTRIBUTE_UNUSED
,
1903 tree ub ATTRIBUTE_UNUSED
,
1904 tree
*stmts ATTRIBUTE_UNUSED
)
1910 default_setup_incoming_vararg_bounds (cumulative_args_t ca ATTRIBUTE_UNUSED
,
1911 enum machine_mode mode ATTRIBUTE_UNUSED
,
1912 tree type ATTRIBUTE_UNUSED
,
1913 int *pretend_arg_size ATTRIBUTE_UNUSED
,
1914 int second_time ATTRIBUTE_UNUSED
)
1918 /* An implementation of TARGET_CAN_USE_DOLOOP_P for targets that do
1919 not support nested low-overhead loops. */
1922 can_use_doloop_if_innermost (const widest_int
&, const widest_int
&,
1923 unsigned int loop_depth
, bool)
1925 return loop_depth
== 1;
1928 #include "gt-targhooks.h"