1 /* Default target hook functions.
2 Copyright (C) 2003-2017 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"
60 #include "stringpool.h"
62 #include "tree-ssanames.h"
63 #include "profile-count.h"
67 #include "diagnostic-core.h"
68 #include "fold-const.h"
69 #include "stor-layout.h"
76 #include "common/common-target.h"
87 default_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED
,
88 rtx addr ATTRIBUTE_UNUSED
,
89 bool strict ATTRIBUTE_UNUSED
)
91 #ifdef GO_IF_LEGITIMATE_ADDRESS
92 /* Defer to the old implementation using a goto. */
94 return strict_memory_address_p (mode
, addr
);
96 return memory_address_p (mode
, addr
);
103 default_external_libcall (rtx fun ATTRIBUTE_UNUSED
)
105 #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL
106 ASM_OUTPUT_EXTERNAL_LIBCALL (asm_out_file
, fun
);
111 default_unspec_may_trap_p (const_rtx x
, unsigned flags
)
115 /* Any floating arithmetic may trap. */
116 if ((SCALAR_FLOAT_MODE_P (GET_MODE (x
)) && flag_trapping_math
))
119 for (i
= 0; i
< XVECLEN (x
, 0); ++i
)
121 if (may_trap_p_1 (XVECEXP (x
, 0, i
), flags
))
129 default_promote_function_mode (const_tree type ATTRIBUTE_UNUSED
,
131 int *punsignedp ATTRIBUTE_UNUSED
,
132 const_tree funtype ATTRIBUTE_UNUSED
,
133 int for_return ATTRIBUTE_UNUSED
)
135 if (type
!= NULL_TREE
&& for_return
== 2)
136 return promote_mode (type
, mode
, punsignedp
);
141 default_promote_function_mode_always_promote (const_tree type
,
144 const_tree funtype ATTRIBUTE_UNUSED
,
145 int for_return ATTRIBUTE_UNUSED
)
147 return promote_mode (type
, mode
, punsignedp
);
151 default_cc_modes_compatible (machine_mode m1
, machine_mode m2
)
159 default_return_in_memory (const_tree type
,
160 const_tree fntype ATTRIBUTE_UNUSED
)
162 return (TYPE_MODE (type
) == BLKmode
);
166 default_legitimize_address (rtx x
, rtx orig_x ATTRIBUTE_UNUSED
,
167 machine_mode mode ATTRIBUTE_UNUSED
)
173 default_legitimize_address_displacement (rtx
*disp ATTRIBUTE_UNUSED
,
174 rtx
*offset ATTRIBUTE_UNUSED
,
175 machine_mode mode ATTRIBUTE_UNUSED
)
181 default_expand_builtin_saveregs (void)
183 error ("__builtin_saveregs not supported by this target");
188 default_setup_incoming_varargs (cumulative_args_t ca ATTRIBUTE_UNUSED
,
189 machine_mode mode ATTRIBUTE_UNUSED
,
190 tree type ATTRIBUTE_UNUSED
,
191 int *pretend_arg_size ATTRIBUTE_UNUSED
,
192 int second_time ATTRIBUTE_UNUSED
)
196 /* The default implementation of TARGET_BUILTIN_SETJMP_FRAME_VALUE. */
199 default_builtin_setjmp_frame_value (void)
201 return virtual_stack_vars_rtx
;
204 /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns false. */
207 hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t ca ATTRIBUTE_UNUSED
)
213 default_pretend_outgoing_varargs_named (cumulative_args_t ca ATTRIBUTE_UNUSED
)
215 return (targetm
.calls
.setup_incoming_varargs
216 != default_setup_incoming_varargs
);
220 default_eh_return_filter_mode (void)
222 return targetm
.unwind_word_mode ();
226 default_libgcc_cmp_return_mode (void)
232 default_libgcc_shift_count_mode (void)
238 default_unwind_word_mode (void)
243 /* The default implementation of TARGET_SHIFT_TRUNCATION_MASK. */
245 unsigned HOST_WIDE_INT
246 default_shift_truncation_mask (machine_mode mode
)
248 return SHIFT_COUNT_TRUNCATED
? GET_MODE_BITSIZE (mode
) - 1 : 0;
251 /* The default implementation of TARGET_MIN_DIVISIONS_FOR_RECIP_MUL. */
254 default_min_divisions_for_recip_mul (machine_mode mode ATTRIBUTE_UNUSED
)
256 return have_insn_for (DIV
, mode
) ? 3 : 2;
259 /* The default implementation of TARGET_MODE_REP_EXTENDED. */
262 default_mode_rep_extended (scalar_int_mode
, scalar_int_mode
)
267 /* Generic hook that takes a CUMULATIVE_ARGS pointer and returns true. */
270 hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t a ATTRIBUTE_UNUSED
)
275 /* Return machine mode for non-standard suffix
276 or VOIDmode if non-standard suffixes are unsupported. */
278 default_mode_for_suffix (char suffix ATTRIBUTE_UNUSED
)
283 /* The generic C++ ABI specifies this is a 64-bit value. */
285 default_cxx_guard_type (void)
287 return long_long_integer_type_node
;
290 /* Returns the size of the cookie to use when allocating an array
291 whose elements have the indicated TYPE. Assumes that it is already
292 known that a cookie is needed. */
295 default_cxx_get_cookie_size (tree type
)
299 /* We need to allocate an additional max (sizeof (size_t), alignof
300 (true_type)) bytes. */
304 sizetype_size
= size_in_bytes (sizetype
);
305 type_align
= size_int (TYPE_ALIGN_UNIT (type
));
306 if (tree_int_cst_lt (type_align
, sizetype_size
))
307 cookie_size
= sizetype_size
;
309 cookie_size
= type_align
;
314 /* Return true if a parameter must be passed by reference. This version
315 of the TARGET_PASS_BY_REFERENCE hook uses just MUST_PASS_IN_STACK. */
318 hook_pass_by_reference_must_pass_in_stack (cumulative_args_t c ATTRIBUTE_UNUSED
,
319 machine_mode mode ATTRIBUTE_UNUSED
, const_tree type ATTRIBUTE_UNUSED
,
320 bool named_arg ATTRIBUTE_UNUSED
)
322 return targetm
.calls
.must_pass_in_stack (mode
, type
);
325 /* Return true if a parameter follows callee copies conventions. This
326 version of the hook is true for all named arguments. */
329 hook_callee_copies_named (cumulative_args_t ca ATTRIBUTE_UNUSED
,
330 machine_mode mode ATTRIBUTE_UNUSED
,
331 const_tree type ATTRIBUTE_UNUSED
, bool named
)
336 /* Emit to STREAM the assembler syntax for insn operand X. */
339 default_print_operand (FILE *stream ATTRIBUTE_UNUSED
, rtx x ATTRIBUTE_UNUSED
,
340 int code ATTRIBUTE_UNUSED
)
343 PRINT_OPERAND (stream
, x
, code
);
349 /* Emit to STREAM the assembler syntax for an insn operand whose memory
353 default_print_operand_address (FILE *stream ATTRIBUTE_UNUSED
,
354 machine_mode
/*mode*/,
355 rtx x ATTRIBUTE_UNUSED
)
357 #ifdef PRINT_OPERAND_ADDRESS
358 PRINT_OPERAND_ADDRESS (stream
, x
);
364 /* Return true if CODE is a valid punctuation character for the
365 `print_operand' hook. */
368 default_print_operand_punct_valid_p (unsigned char code ATTRIBUTE_UNUSED
)
370 #ifdef PRINT_OPERAND_PUNCT_VALID_P
371 return PRINT_OPERAND_PUNCT_VALID_P (code
);
377 /* The default implementation of TARGET_MANGLE_ASSEMBLER_NAME. */
379 default_mangle_assembler_name (const char *name ATTRIBUTE_UNUSED
)
381 const char *skipped
= name
+ (*name
== '*' ? 1 : 0);
382 const char *stripped
= targetm
.strip_name_encoding (skipped
);
383 if (*name
!= '*' && user_label_prefix
[0])
384 stripped
= ACONCAT ((user_label_prefix
, stripped
, NULL
));
385 return get_identifier (stripped
);
388 /* True if MODE is valid for the target. By "valid", we mean able to
389 be manipulated in non-trivial ways. In particular, this means all
390 the arithmetic is supported.
392 By default we guess this means that any C type is supported. If
393 we can't map the mode back to a type that would be available in C,
394 then reject it. Special case, here, is the double-word arithmetic
395 supported by optabs.c. */
398 default_scalar_mode_supported_p (scalar_mode mode
)
400 int precision
= GET_MODE_PRECISION (mode
);
402 switch (GET_MODE_CLASS (mode
))
404 case MODE_PARTIAL_INT
:
406 if (precision
== CHAR_TYPE_SIZE
)
408 if (precision
== SHORT_TYPE_SIZE
)
410 if (precision
== INT_TYPE_SIZE
)
412 if (precision
== LONG_TYPE_SIZE
)
414 if (precision
== LONG_LONG_TYPE_SIZE
)
416 if (precision
== 2 * BITS_PER_WORD
)
421 if (precision
== FLOAT_TYPE_SIZE
)
423 if (precision
== DOUBLE_TYPE_SIZE
)
425 if (precision
== LONG_DOUBLE_TYPE_SIZE
)
429 case MODE_DECIMAL_FLOAT
:
441 /* Return true if libgcc supports floating-point mode MODE (known to
442 be supported as a scalar mode). */
445 default_libgcc_floating_mode_supported_p (scalar_float_mode mode
)
468 /* Return the machine mode to use for the type _FloatN, if EXTENDED is
469 false, or _FloatNx, if EXTENDED is true, or VOIDmode if not
471 opt_scalar_float_mode
472 default_floatn_mode (int n
, bool extended
)
476 opt_scalar_float_mode cand1
, cand2
;
477 scalar_float_mode mode
;
499 /* Those are the only valid _FloatNx types. */
502 if (cand1
.exists (&mode
)
503 && REAL_MODE_FORMAT (mode
)->ieee_bits
> n
504 && targetm
.scalar_mode_supported_p (mode
)
505 && targetm
.libgcc_floating_mode_supported_p (mode
))
507 if (cand2
.exists (&mode
)
508 && REAL_MODE_FORMAT (mode
)->ieee_bits
> n
509 && targetm
.scalar_mode_supported_p (mode
)
510 && targetm
.libgcc_floating_mode_supported_p (mode
))
515 opt_scalar_float_mode cand
;
516 scalar_float_mode mode
;
520 /* Always enable _Float16 if we have basic support for the mode.
521 Targets can control the range and precision of operations on
522 the _Float16 type using TARGET_C_EXCESS_PRECISION. */
549 if (cand
.exists (&mode
)
550 && REAL_MODE_FORMAT (mode
)->ieee_bits
== n
551 && targetm
.scalar_mode_supported_p (mode
)
552 && targetm
.libgcc_floating_mode_supported_p (mode
))
555 return opt_scalar_float_mode ();
558 /* Make some target macros useable by target-independent code. */
560 targhook_words_big_endian (void)
562 return !!WORDS_BIG_ENDIAN
;
566 targhook_float_words_big_endian (void)
568 return !!FLOAT_WORDS_BIG_ENDIAN
;
571 /* True if the target supports floating-point exceptions and rounding
575 default_float_exceptions_rounding_supported_p (void)
584 /* True if the target supports decimal floating point. */
587 default_decimal_float_supported_p (void)
589 return ENABLE_DECIMAL_FLOAT
;
592 /* True if the target supports fixed-point arithmetic. */
595 default_fixed_point_supported_p (void)
597 return ENABLE_FIXED_POINT
;
600 /* True if the target supports GNU indirect functions. */
603 default_has_ifunc_p (void)
605 return HAVE_GNU_INDIRECT_FUNCTION
;
608 /* NULL if INSN insn is valid within a low-overhead loop, otherwise returns
611 This function checks whether a given INSN is valid within a low-overhead
612 loop. If INSN is invalid it returns the reason for that, otherwise it
613 returns NULL. A called function may clobber any special registers required
614 for low-overhead looping. Additionally, some targets (eg, PPC) use the count
615 register for branch on table instructions. We reject the doloop pattern in
619 default_invalid_within_doloop (const rtx_insn
*insn
)
622 return "Function call in loop.";
624 if (tablejump_p (insn
, NULL
, NULL
) || computed_jump_p (insn
))
625 return "Computed branch in the loop.";
630 /* Mapping of builtin functions to vectorized variants. */
633 default_builtin_vectorized_function (unsigned int, tree
, tree
)
638 /* Mapping of target builtin functions to vectorized variants. */
641 default_builtin_md_vectorized_function (tree
, tree
, tree
)
646 /* Vectorized conversion. */
649 default_builtin_vectorized_conversion (unsigned int code ATTRIBUTE_UNUSED
,
650 tree dest_type ATTRIBUTE_UNUSED
,
651 tree src_type ATTRIBUTE_UNUSED
)
656 /* Default vectorizer cost model values. */
659 default_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost
,
661 int misalign ATTRIBUTE_UNUSED
)
663 switch (type_of_cost
)
673 case cond_branch_not_taken
:
675 case vec_promote_demote
:
679 case unaligned_store
:
682 case cond_branch_taken
:
686 return TYPE_VECTOR_SUBPARTS (vectype
) - 1;
696 default_builtin_reciprocal (tree
)
702 hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false (
703 cumulative_args_t ca ATTRIBUTE_UNUSED
,
704 machine_mode mode ATTRIBUTE_UNUSED
,
705 const_tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
711 hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true (
712 cumulative_args_t ca ATTRIBUTE_UNUSED
,
713 machine_mode mode ATTRIBUTE_UNUSED
,
714 const_tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
720 hook_int_CUMULATIVE_ARGS_mode_tree_bool_0 (
721 cumulative_args_t ca ATTRIBUTE_UNUSED
,
722 machine_mode mode ATTRIBUTE_UNUSED
,
723 tree type ATTRIBUTE_UNUSED
, bool named ATTRIBUTE_UNUSED
)
729 default_function_arg_advance (cumulative_args_t ca ATTRIBUTE_UNUSED
,
730 machine_mode mode ATTRIBUTE_UNUSED
,
731 const_tree type ATTRIBUTE_UNUSED
,
732 bool named ATTRIBUTE_UNUSED
)
737 /* Default implementation of TARGET_FUNCTION_ARG_PADDING: usually pad
738 upward, but pad short args downward on big-endian machines. */
741 default_function_arg_padding (machine_mode mode
, const_tree type
)
743 if (!BYTES_BIG_ENDIAN
)
746 unsigned HOST_WIDE_INT size
;
749 if (!type
|| TREE_CODE (TYPE_SIZE (type
)) != INTEGER_CST
)
751 size
= int_size_in_bytes (type
);
754 size
= GET_MODE_SIZE (mode
);
756 if (size
< (PARM_BOUNDARY
/ BITS_PER_UNIT
))
763 default_function_arg (cumulative_args_t ca ATTRIBUTE_UNUSED
,
764 machine_mode mode ATTRIBUTE_UNUSED
,
765 const_tree type ATTRIBUTE_UNUSED
,
766 bool named ATTRIBUTE_UNUSED
)
772 default_function_incoming_arg (cumulative_args_t ca ATTRIBUTE_UNUSED
,
773 machine_mode mode ATTRIBUTE_UNUSED
,
774 const_tree type ATTRIBUTE_UNUSED
,
775 bool named ATTRIBUTE_UNUSED
)
781 default_function_arg_boundary (machine_mode mode ATTRIBUTE_UNUSED
,
782 const_tree type ATTRIBUTE_UNUSED
)
784 return PARM_BOUNDARY
;
788 default_function_arg_round_boundary (machine_mode mode ATTRIBUTE_UNUSED
,
789 const_tree type ATTRIBUTE_UNUSED
)
791 return PARM_BOUNDARY
;
795 hook_void_bitmap (bitmap regs ATTRIBUTE_UNUSED
)
800 hook_invalid_arg_for_unprototyped_fn (
801 const_tree typelist ATTRIBUTE_UNUSED
,
802 const_tree funcdecl ATTRIBUTE_UNUSED
,
803 const_tree val ATTRIBUTE_UNUSED
)
808 /* Initialize the stack protection decls. */
810 /* Stack protection related decls living in libgcc. */
811 static GTY(()) tree stack_chk_guard_decl
;
814 default_stack_protect_guard (void)
816 tree t
= stack_chk_guard_decl
;
822 t
= build_decl (UNKNOWN_LOCATION
,
823 VAR_DECL
, get_identifier ("__stack_chk_guard"),
827 DECL_EXTERNAL (t
) = 1;
829 TREE_THIS_VOLATILE (t
) = 1;
830 DECL_ARTIFICIAL (t
) = 1;
831 DECL_IGNORED_P (t
) = 1;
833 /* Do not share RTL as the declaration is visible outside of
836 RTX_FLAG (x
, used
) = 1;
838 stack_chk_guard_decl
= t
;
844 static GTY(()) tree stack_chk_fail_decl
;
847 default_external_stack_protect_fail (void)
849 tree t
= stack_chk_fail_decl
;
853 t
= build_function_type_list (void_type_node
, NULL_TREE
);
854 t
= build_decl (UNKNOWN_LOCATION
,
855 FUNCTION_DECL
, get_identifier ("__stack_chk_fail"), t
);
858 DECL_EXTERNAL (t
) = 1;
860 TREE_THIS_VOLATILE (t
) = 1;
861 TREE_NOTHROW (t
) = 1;
862 DECL_ARTIFICIAL (t
) = 1;
863 DECL_IGNORED_P (t
) = 1;
864 DECL_VISIBILITY (t
) = VISIBILITY_DEFAULT
;
865 DECL_VISIBILITY_SPECIFIED (t
) = 1;
867 stack_chk_fail_decl
= t
;
870 return build_call_expr (t
, 0);
874 default_hidden_stack_protect_fail (void)
876 #ifndef HAVE_GAS_HIDDEN
877 return default_external_stack_protect_fail ();
879 tree t
= stack_chk_fail_decl
;
882 return default_external_stack_protect_fail ();
886 t
= build_function_type_list (void_type_node
, NULL_TREE
);
887 t
= build_decl (UNKNOWN_LOCATION
, FUNCTION_DECL
,
888 get_identifier ("__stack_chk_fail_local"), t
);
891 DECL_EXTERNAL (t
) = 1;
893 TREE_THIS_VOLATILE (t
) = 1;
894 TREE_NOTHROW (t
) = 1;
895 DECL_ARTIFICIAL (t
) = 1;
896 DECL_IGNORED_P (t
) = 1;
897 DECL_VISIBILITY_SPECIFIED (t
) = 1;
898 DECL_VISIBILITY (t
) = VISIBILITY_HIDDEN
;
900 stack_chk_fail_decl
= t
;
903 return build_call_expr (t
, 0);
908 hook_bool_const_rtx_commutative_p (const_rtx x
,
909 int outer_code ATTRIBUTE_UNUSED
)
911 return COMMUTATIVE_P (x
);
915 default_function_value (const_tree ret_type ATTRIBUTE_UNUSED
,
916 const_tree fn_decl_or_type
,
917 bool outgoing ATTRIBUTE_UNUSED
)
919 /* The old interface doesn't handle receiving the function type. */
921 && !DECL_P (fn_decl_or_type
))
922 fn_decl_or_type
= NULL
;
924 #ifdef FUNCTION_VALUE
925 return FUNCTION_VALUE (ret_type
, fn_decl_or_type
);
932 default_libcall_value (machine_mode mode ATTRIBUTE_UNUSED
,
933 const_rtx fun ATTRIBUTE_UNUSED
)
936 return LIBCALL_VALUE (mode
);
942 /* The default hook for TARGET_FUNCTION_VALUE_REGNO_P. */
945 default_function_value_regno_p (const unsigned int regno ATTRIBUTE_UNUSED
)
947 #ifdef FUNCTION_VALUE_REGNO_P
948 return FUNCTION_VALUE_REGNO_P (regno
);
955 default_internal_arg_pointer (void)
957 /* If the reg that the virtual arg pointer will be translated into is
958 not a fixed reg or is the stack pointer, make a copy of the virtual
959 arg pointer, and address parms via the copy. The frame pointer is
960 considered fixed even though it is not marked as such. */
961 if ((ARG_POINTER_REGNUM
== STACK_POINTER_REGNUM
962 || ! (fixed_regs
[ARG_POINTER_REGNUM
]
963 || ARG_POINTER_REGNUM
== FRAME_POINTER_REGNUM
)))
964 return copy_to_reg (virtual_incoming_args_rtx
);
966 return virtual_incoming_args_rtx
;
970 default_static_chain (const_tree
ARG_UNUSED (fndecl_or_type
), bool incoming_p
)
974 #ifdef STATIC_CHAIN_INCOMING_REGNUM
975 return gen_rtx_REG (Pmode
, STATIC_CHAIN_INCOMING_REGNUM
);
979 #ifdef STATIC_CHAIN_REGNUM
980 return gen_rtx_REG (Pmode
, STATIC_CHAIN_REGNUM
);
984 static bool issued_error
;
988 sorry ("nested functions not supported on this target");
991 /* It really doesn't matter what we return here, so long at it
992 doesn't cause the rest of the compiler to crash. */
993 return gen_rtx_MEM (Pmode
, stack_pointer_rtx
);
998 default_trampoline_init (rtx
ARG_UNUSED (m_tramp
), tree
ARG_UNUSED (t_func
),
999 rtx
ARG_UNUSED (r_chain
))
1001 sorry ("nested function trampolines not supported on this target");
1005 default_return_pops_args (tree fundecl ATTRIBUTE_UNUSED
,
1006 tree funtype ATTRIBUTE_UNUSED
,
1007 int size ATTRIBUTE_UNUSED
)
1013 default_branch_target_register_class (void)
1019 default_ira_change_pseudo_allocno_class (int regno ATTRIBUTE_UNUSED
,
1021 reg_class_t best_cl ATTRIBUTE_UNUSED
)
1027 default_lra_p (void)
1033 default_register_priority (int hard_regno ATTRIBUTE_UNUSED
)
1039 default_register_usage_leveling_p (void)
1045 default_different_addr_displacement_p (void)
1051 default_secondary_reload (bool in_p ATTRIBUTE_UNUSED
, rtx x ATTRIBUTE_UNUSED
,
1052 reg_class_t reload_class_i ATTRIBUTE_UNUSED
,
1053 machine_mode reload_mode ATTRIBUTE_UNUSED
,
1054 secondary_reload_info
*sri
)
1056 enum reg_class rclass
= NO_REGS
;
1057 enum reg_class reload_class
= (enum reg_class
) reload_class_i
;
1059 if (sri
->prev_sri
&& sri
->prev_sri
->t_icode
!= CODE_FOR_nothing
)
1061 sri
->icode
= sri
->prev_sri
->t_icode
;
1064 #ifdef SECONDARY_INPUT_RELOAD_CLASS
1066 rclass
= SECONDARY_INPUT_RELOAD_CLASS (reload_class
, reload_mode
, x
);
1068 #ifdef SECONDARY_OUTPUT_RELOAD_CLASS
1070 rclass
= SECONDARY_OUTPUT_RELOAD_CLASS (reload_class
, reload_mode
, x
);
1072 if (rclass
!= NO_REGS
)
1074 enum insn_code icode
1075 = direct_optab_handler (in_p
? reload_in_optab
: reload_out_optab
,
1078 if (icode
!= CODE_FOR_nothing
1079 && !insn_operand_matches (icode
, in_p
, x
))
1080 icode
= CODE_FOR_nothing
;
1081 else if (icode
!= CODE_FOR_nothing
)
1083 const char *insn_constraint
, *scratch_constraint
;
1084 enum reg_class insn_class
, scratch_class
;
1086 gcc_assert (insn_data
[(int) icode
].n_operands
== 3);
1087 insn_constraint
= insn_data
[(int) icode
].operand
[!in_p
].constraint
;
1088 if (!*insn_constraint
)
1089 insn_class
= ALL_REGS
;
1094 gcc_assert (*insn_constraint
== '=');
1097 insn_class
= (reg_class_for_constraint
1098 (lookup_constraint (insn_constraint
)));
1099 gcc_assert (insn_class
!= NO_REGS
);
1102 scratch_constraint
= insn_data
[(int) icode
].operand
[2].constraint
;
1103 /* The scratch register's constraint must start with "=&",
1104 except for an input reload, where only "=" is necessary,
1105 and where it might be beneficial to re-use registers from
1107 gcc_assert (scratch_constraint
[0] == '='
1108 && (in_p
|| scratch_constraint
[1] == '&'));
1109 scratch_constraint
++;
1110 if (*scratch_constraint
== '&')
1111 scratch_constraint
++;
1112 scratch_class
= (reg_class_for_constraint
1113 (lookup_constraint (scratch_constraint
)));
1115 if (reg_class_subset_p (reload_class
, insn_class
))
1117 gcc_assert (scratch_class
== rclass
);
1121 rclass
= insn_class
;
1124 if (rclass
== NO_REGS
)
1127 sri
->t_icode
= icode
;
1132 /* By default, if flag_pic is true, then neither local nor global relocs
1133 should be placed in readonly memory. */
1136 default_reloc_rw_mask (void)
1138 return flag_pic
? 3 : 0;
1141 /* By default, do no modification. */
1142 tree
default_mangle_decl_assembler_name (tree decl ATTRIBUTE_UNUSED
,
1148 /* Default to natural alignment for vector types. */
1150 default_vector_alignment (const_tree type
)
1152 HOST_WIDE_INT align
= tree_to_shwi (TYPE_SIZE (type
));
1153 if (align
> MAX_OFILE_ALIGNMENT
)
1154 align
= MAX_OFILE_ALIGNMENT
;
1158 /* By default assume vectors of element TYPE require a multiple of the natural
1159 alignment of TYPE. TYPE is naturally aligned if IS_PACKED is false. */
1161 default_builtin_vector_alignment_reachable (const_tree
/*type*/, bool is_packed
)
1166 /* By default, assume that a target supports any factor of misalignment
1167 memory access if it supports movmisalign patten.
1168 is_packed is true if the memory access is defined in a packed struct. */
1170 default_builtin_support_vector_misalignment (machine_mode mode
,
1178 if (optab_handler (movmisalign_optab
, mode
) != CODE_FOR_nothing
)
1183 /* By default, only attempt to parallelize bitwise operations, and
1184 possibly adds/subtracts using bit-twiddling. */
1187 default_preferred_simd_mode (scalar_mode
)
1192 /* By default only the size derived from the preferred vector mode
1196 default_autovectorize_vector_sizes (void)
1201 /* By defaults a vector of integers is used as a mask. */
1204 default_get_mask_mode (unsigned nunits
, unsigned vector_size
)
1206 unsigned elem_size
= vector_size
/ nunits
;
1207 scalar_int_mode elem_mode
1208 = smallest_int_mode_for_size (elem_size
* BITS_PER_UNIT
);
1209 machine_mode vector_mode
;
1211 gcc_assert (elem_size
* nunits
== vector_size
);
1213 if (mode_for_vector (elem_mode
, nunits
).exists (&vector_mode
)
1214 && VECTOR_MODE_P (vector_mode
)
1215 && targetm
.vector_mode_supported_p (vector_mode
))
1218 return opt_machine_mode ();
1221 /* By default, the cost model accumulates three separate costs (prologue,
1222 loop body, and epilogue) for a vectorized loop or block. So allocate an
1223 array of three unsigned ints, set it to zero, and return its address. */
1226 default_init_cost (struct loop
*loop_info ATTRIBUTE_UNUSED
)
1228 unsigned *cost
= XNEWVEC (unsigned, 3);
1229 cost
[vect_prologue
] = cost
[vect_body
] = cost
[vect_epilogue
] = 0;
1233 /* By default, the cost model looks up the cost of the given statement
1234 kind and mode, multiplies it by the occurrence count, accumulates
1235 it into the cost specified by WHERE, and returns the cost added. */
1238 default_add_stmt_cost (void *data
, int count
, enum vect_cost_for_stmt kind
,
1239 struct _stmt_vec_info
*stmt_info
, int misalign
,
1240 enum vect_cost_model_location where
)
1242 unsigned *cost
= (unsigned *) data
;
1243 unsigned retval
= 0;
1245 tree vectype
= stmt_info
? stmt_vectype (stmt_info
) : NULL_TREE
;
1246 int stmt_cost
= targetm
.vectorize
.builtin_vectorization_cost (kind
, vectype
,
1248 /* Statements in an inner loop relative to the loop being
1249 vectorized are weighted more heavily. The value here is
1250 arbitrary and could potentially be improved with analysis. */
1251 if (where
== vect_body
&& stmt_info
&& stmt_in_inner_loop_p (stmt_info
))
1252 count
*= 50; /* FIXME. */
1254 retval
= (unsigned) (count
* stmt_cost
);
1255 cost
[where
] += retval
;
1260 /* By default, the cost model just returns the accumulated costs. */
1263 default_finish_cost (void *data
, unsigned *prologue_cost
,
1264 unsigned *body_cost
, unsigned *epilogue_cost
)
1266 unsigned *cost
= (unsigned *) data
;
1267 *prologue_cost
= cost
[vect_prologue
];
1268 *body_cost
= cost
[vect_body
];
1269 *epilogue_cost
= cost
[vect_epilogue
];
1272 /* Free the cost data. */
1275 default_destroy_cost_data (void *data
)
1280 /* Determine whether or not a pointer mode is valid. Assume defaults
1281 of ptr_mode or Pmode - can be overridden. */
1283 default_valid_pointer_mode (scalar_int_mode mode
)
1285 return (mode
== ptr_mode
|| mode
== Pmode
);
1288 /* Determine whether the memory reference specified by REF may alias
1289 the C libraries errno location. */
1291 default_ref_may_alias_errno (ao_ref
*ref
)
1293 tree base
= ao_ref_base (ref
);
1294 /* The default implementation assumes the errno location is
1295 a declaration of type int or is always accessed via a
1296 pointer to int. We assume that accesses to errno are
1297 not deliberately obfuscated (even in conforming ways). */
1298 if (TYPE_UNSIGNED (TREE_TYPE (base
))
1299 || TYPE_MODE (TREE_TYPE (base
)) != TYPE_MODE (integer_type_node
))
1301 /* The default implementation assumes an errno location
1302 declaration is never defined in the current compilation unit. */
1304 && !TREE_STATIC (base
))
1306 else if (TREE_CODE (base
) == MEM_REF
1307 && TREE_CODE (TREE_OPERAND (base
, 0)) == SSA_NAME
)
1309 struct ptr_info_def
*pi
= SSA_NAME_PTR_INFO (TREE_OPERAND (base
, 0));
1310 return !pi
|| pi
->pt
.anything
|| pi
->pt
.nonlocal
;
1315 /* Return the mode for a pointer to a given ADDRSPACE,
1316 defaulting to ptr_mode for all address spaces. */
1319 default_addr_space_pointer_mode (addr_space_t addrspace ATTRIBUTE_UNUSED
)
1324 /* Return the mode for an address in a given ADDRSPACE,
1325 defaulting to Pmode for all address spaces. */
1328 default_addr_space_address_mode (addr_space_t addrspace ATTRIBUTE_UNUSED
)
1333 /* Named address space version of valid_pointer_mode.
1334 To match the above, the same modes apply to all address spaces. */
1337 default_addr_space_valid_pointer_mode (scalar_int_mode mode
,
1338 addr_space_t as ATTRIBUTE_UNUSED
)
1340 return targetm
.valid_pointer_mode (mode
);
1343 /* Some places still assume that all pointer or address modes are the
1344 standard Pmode and ptr_mode. These optimizations become invalid if
1345 the target actually supports multiple different modes. For now,
1346 we disable such optimizations on such targets, using this function. */
1349 target_default_pointer_address_modes_p (void)
1351 if (targetm
.addr_space
.address_mode
!= default_addr_space_address_mode
)
1353 if (targetm
.addr_space
.pointer_mode
!= default_addr_space_pointer_mode
)
1359 /* Named address space version of legitimate_address_p.
1360 By default, all address spaces have the same form. */
1363 default_addr_space_legitimate_address_p (machine_mode mode
, rtx mem
,
1365 addr_space_t as ATTRIBUTE_UNUSED
)
1367 return targetm
.legitimate_address_p (mode
, mem
, strict
);
1370 /* Named address space version of LEGITIMIZE_ADDRESS.
1371 By default, all address spaces have the same form. */
1374 default_addr_space_legitimize_address (rtx x
, rtx oldx
, machine_mode mode
,
1375 addr_space_t as ATTRIBUTE_UNUSED
)
1377 return targetm
.legitimize_address (x
, oldx
, mode
);
1380 /* The default hook for determining if one named address space is a subset of
1381 another and to return which address space to use as the common address
1385 default_addr_space_subset_p (addr_space_t subset
, addr_space_t superset
)
1387 return (subset
== superset
);
1390 /* The default hook for determining if 0 within a named address
1391 space is a valid address. */
1394 default_addr_space_zero_address_valid (addr_space_t as ATTRIBUTE_UNUSED
)
1399 /* The default hook for debugging the address space is to return the
1400 address space number to indicate DW_AT_address_class. */
1402 default_addr_space_debug (addr_space_t as
)
1407 /* The default hook implementation for TARGET_ADDR_SPACE_DIAGNOSE_USAGE.
1408 Don't complain about any address space. */
1411 default_addr_space_diagnose_usage (addr_space_t
, location_t
)
1416 /* The default hook for TARGET_ADDR_SPACE_CONVERT. This hook should never be
1417 called for targets with only a generic address space. */
1420 default_addr_space_convert (rtx op ATTRIBUTE_UNUSED
,
1421 tree from_type ATTRIBUTE_UNUSED
,
1422 tree to_type ATTRIBUTE_UNUSED
)
1428 default_hard_regno_scratch_ok (unsigned int regno ATTRIBUTE_UNUSED
)
1433 /* The default implementation of TARGET_MODE_DEPENDENT_ADDRESS_P. */
1436 default_mode_dependent_address_p (const_rtx addr ATTRIBUTE_UNUSED
,
1437 addr_space_t addrspace ATTRIBUTE_UNUSED
)
1443 default_target_option_valid_attribute_p (tree
ARG_UNUSED (fndecl
),
1444 tree
ARG_UNUSED (name
),
1445 tree
ARG_UNUSED (args
),
1446 int ARG_UNUSED (flags
))
1448 warning (OPT_Wattributes
,
1449 "target attribute is not supported on this machine");
1455 default_target_option_pragma_parse (tree
ARG_UNUSED (args
),
1456 tree
ARG_UNUSED (pop_target
))
1458 /* If args is NULL the caller is handle_pragma_pop_options (). In that case,
1459 emit no warning because "#pragma GCC pop_target" is valid on targets that
1460 do not have the "target" pragma. */
1462 warning (OPT_Wpragmas
,
1463 "#pragma GCC target is not supported for this machine");
1469 default_target_can_inline_p (tree caller
, tree callee
)
1471 tree callee_opts
= DECL_FUNCTION_SPECIFIC_TARGET (callee
);
1472 tree caller_opts
= DECL_FUNCTION_SPECIFIC_TARGET (caller
);
1474 callee_opts
= target_option_default_node
;
1476 caller_opts
= target_option_default_node
;
1478 /* If both caller and callee have attributes, assume that if the
1479 pointer is different, the two functions have different target
1480 options since build_target_option_node uses a hash table for the
1482 return callee_opts
== caller_opts
;
1485 /* If the machine does not have a case insn that compares the bounds,
1486 this means extra overhead for dispatch tables, which raises the
1487 threshold for using them. */
1490 default_case_values_threshold (void)
1492 return (targetm
.have_casesi () ? 4 : 5);
1496 default_have_conditional_execution (void)
1498 return HAVE_conditional_execution
;
1501 /* By default we assume that c99 functions are present at the runtime,
1502 but sincos is not. */
1504 default_libc_has_function (enum function_class fn_class
)
1506 if (fn_class
== function_c94
1507 || fn_class
== function_c99_misc
1508 || fn_class
== function_c99_math_complex
)
1515 gnu_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED
)
1521 no_c99_libc_has_function (enum function_class fn_class ATTRIBUTE_UNUSED
)
1527 default_builtin_tm_load_store (tree
ARG_UNUSED (type
))
1532 /* Compute cost of moving registers to/from memory. */
1535 default_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED
,
1536 reg_class_t rclass ATTRIBUTE_UNUSED
,
1537 bool in ATTRIBUTE_UNUSED
)
1539 #ifndef MEMORY_MOVE_COST
1540 return (4 + memory_move_secondary_cost (mode
, (enum reg_class
) rclass
, in
));
1542 return MEMORY_MOVE_COST (mode
, (enum reg_class
) rclass
, in
);
1546 /* Compute cost of moving data from a register of class FROM to one of
1550 default_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED
,
1551 reg_class_t from ATTRIBUTE_UNUSED
,
1552 reg_class_t to ATTRIBUTE_UNUSED
)
1554 #ifndef REGISTER_MOVE_COST
1557 return REGISTER_MOVE_COST (mode
, (enum reg_class
) from
, (enum reg_class
) to
);
1561 /* For hooks which use the MOVE_RATIO macro, this gives the legacy default
1562 behavior. SPEED_P is true if we are compiling for speed. */
1565 get_move_ratio (bool speed_p ATTRIBUTE_UNUSED
)
1567 unsigned int move_ratio
;
1569 move_ratio
= (unsigned int) MOVE_RATIO (speed_p
);
1571 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1573 #else /* No movmem patterns, pick a default. */
1574 move_ratio
= ((speed_p
) ? 15 : 3);
1580 /* Return TRUE if the move_by_pieces/set_by_pieces infrastructure should be
1581 used; return FALSE if the movmem/setmem optab should be expanded, or
1582 a call to memcpy emitted. */
1585 default_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size
,
1586 unsigned int alignment
,
1587 enum by_pieces_operation op
,
1590 unsigned int max_size
= 0;
1591 unsigned int ratio
= 0;
1595 case CLEAR_BY_PIECES
:
1596 max_size
= STORE_MAX_PIECES
;
1597 ratio
= CLEAR_RATIO (speed_p
);
1599 case MOVE_BY_PIECES
:
1600 max_size
= MOVE_MAX_PIECES
;
1601 ratio
= get_move_ratio (speed_p
);
1604 max_size
= STORE_MAX_PIECES
;
1605 ratio
= SET_RATIO (speed_p
);
1607 case STORE_BY_PIECES
:
1608 max_size
= STORE_MAX_PIECES
;
1609 ratio
= get_move_ratio (speed_p
);
1611 case COMPARE_BY_PIECES
:
1612 max_size
= COMPARE_MAX_PIECES
;
1613 /* Pick a likely default, just as in get_move_ratio. */
1614 ratio
= speed_p
? 15 : 3;
1618 return by_pieces_ninsns (size
, alignment
, max_size
+ 1, op
) < ratio
;
1621 /* This hook controls code generation for expanding a memcmp operation by
1622 pieces. Return 1 for the normal pattern of compare/jump after each pair
1623 of loads, or a higher number to reduce the number of branches. */
1626 default_compare_by_pieces_branch_ratio (machine_mode
)
1631 /* Write PATCH_AREA_SIZE NOPs into the asm outfile FILE around a function
1632 entry. If RECORD_P is true and the target supports named sections,
1633 the location of the NOPs will be recorded in a special object section
1634 called "__patchable_function_entries". This routine may be called
1635 twice per function to put NOPs before and after the function
1639 default_print_patchable_function_entry (FILE *file
,
1640 unsigned HOST_WIDE_INT patch_area_size
,
1643 const char *nop_templ
= 0;
1645 rtx_insn
*my_nop
= make_insn_raw (gen_nop ());
1647 /* We use the template alone, relying on the (currently sane) assumption
1648 that the NOP template does not have variable operands. */
1649 code_num
= recog_memoized (my_nop
);
1650 nop_templ
= get_insn_template (code_num
, my_nop
);
1652 if (record_p
&& targetm_common
.have_named_sections
)
1655 static int patch_area_number
;
1656 section
*previous_section
= in_section
;
1658 patch_area_number
++;
1659 ASM_GENERATE_INTERNAL_LABEL (buf
, "LPFE", patch_area_number
);
1661 switch_to_section (get_section ("__patchable_function_entries",
1663 fputs (integer_asm_op (POINTER_SIZE_UNITS
, false), file
);
1664 assemble_name_raw (file
, buf
);
1667 switch_to_section (previous_section
);
1668 ASM_OUTPUT_LABEL (file
, buf
);
1672 for (i
= 0; i
< patch_area_size
; ++i
)
1673 fprintf (file
, "\t%s\n", nop_templ
);
1677 default_profile_before_prologue (void)
1679 #ifdef PROFILE_BEFORE_PROLOGUE
1686 /* The default implementation of TARGET_PREFERRED_RELOAD_CLASS. */
1689 default_preferred_reload_class (rtx x ATTRIBUTE_UNUSED
,
1692 #ifdef PREFERRED_RELOAD_CLASS
1693 return (reg_class_t
) PREFERRED_RELOAD_CLASS (x
, (enum reg_class
) rclass
);
1699 /* The default implementation of TARGET_OUTPUT_PREFERRED_RELOAD_CLASS. */
1702 default_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED
,
1708 /* The default implementation of TARGET_PREFERRED_RENAME_CLASS. */
1710 default_preferred_rename_class (reg_class_t rclass ATTRIBUTE_UNUSED
)
1715 /* The default implementation of TARGET_CLASS_LIKELY_SPILLED_P. */
1718 default_class_likely_spilled_p (reg_class_t rclass
)
1720 return (reg_class_size
[(int) rclass
] == 1);
1723 /* The default implementation of TARGET_CLASS_MAX_NREGS. */
1726 default_class_max_nregs (reg_class_t rclass ATTRIBUTE_UNUSED
,
1727 machine_mode mode ATTRIBUTE_UNUSED
)
1729 #ifdef CLASS_MAX_NREGS
1730 return (unsigned char) CLASS_MAX_NREGS ((enum reg_class
) rclass
, mode
);
1732 return ((GET_MODE_SIZE (mode
) + UNITS_PER_WORD
- 1) / UNITS_PER_WORD
);
1736 /* Determine the debugging unwind mechanism for the target. */
1738 enum unwind_info_type
1739 default_debug_unwind_info (void)
1741 /* If the target wants to force the use of dwarf2 unwind info, let it. */
1742 /* ??? Change all users to the hook, then poison this. */
1743 #ifdef DWARF2_FRAME_INFO
1744 if (DWARF2_FRAME_INFO
)
1748 /* Otherwise, only turn it on if dwarf2 debugging is enabled. */
1749 #ifdef DWARF2_DEBUGGING_INFO
1750 if (write_symbols
== DWARF2_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1757 /* Determine the correct mode for a Dwarf frame register that represents
1761 default_dwarf_frame_reg_mode (int regno
)
1763 machine_mode save_mode
= reg_raw_mode
[regno
];
1765 if (targetm
.hard_regno_call_part_clobbered (regno
, save_mode
))
1766 save_mode
= choose_hard_reg_mode (regno
, 1, true);
1770 /* To be used by targets where reg_raw_mode doesn't return the right
1771 mode for registers used in apply_builtin_return and apply_builtin_arg. */
1774 default_get_reg_raw_mode (int regno
)
1776 return reg_raw_mode
[regno
];
1779 /* Return true if a leaf function should stay leaf even with profiling
1783 default_keep_leaf_when_profiled ()
1788 /* Return true if the state of option OPTION should be stored in PCH files
1789 and checked by default_pch_valid_p. Store the option's current state
1793 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1795 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1797 if ((cl_options
[option
].flags
& CL_PCH_IGNORE
) != 0)
1799 if (option_flag_var (option
, &global_options
) == &target_flags
)
1800 if (targetm
.check_pch_target_flags
)
1802 return get_option_state (&global_options
, option
, state
);
1805 /* Default version of get_pch_validity.
1806 By default, every flag difference is fatal; that will be mostly right for
1807 most targets, but completely right for very few. */
1810 default_get_pch_validity (size_t *sz
)
1812 struct cl_option_state state
;
1817 if (targetm
.check_pch_target_flags
)
1818 *sz
+= sizeof (target_flags
);
1819 for (i
= 0; i
< cl_options_count
; i
++)
1820 if (option_affects_pch_p (i
, &state
))
1823 result
= r
= XNEWVEC (char, *sz
);
1827 if (targetm
.check_pch_target_flags
)
1829 memcpy (r
, &target_flags
, sizeof (target_flags
));
1830 r
+= sizeof (target_flags
);
1833 for (i
= 0; i
< cl_options_count
; i
++)
1834 if (option_affects_pch_p (i
, &state
))
1836 memcpy (r
, state
.data
, state
.size
);
1843 /* Return a message which says that a PCH file was created with a different
1844 setting of OPTION. */
1847 pch_option_mismatch (const char *option
)
1849 return xasprintf (_("created and used with differing settings of '%s'"),
1853 /* Default version of pch_valid_p. */
1856 default_pch_valid_p (const void *data_p
, size_t len
)
1858 struct cl_option_state state
;
1859 const char *data
= (const char *)data_p
;
1862 /* -fpic and -fpie also usually make a PCH invalid. */
1863 if (data
[0] != flag_pic
)
1864 return _("created and used with different settings of -fpic");
1865 if (data
[1] != flag_pie
)
1866 return _("created and used with different settings of -fpie");
1869 /* Check target_flags. */
1870 if (targetm
.check_pch_target_flags
)
1875 memcpy (&tf
, data
, sizeof (target_flags
));
1876 data
+= sizeof (target_flags
);
1877 len
-= sizeof (target_flags
);
1878 r
= targetm
.check_pch_target_flags (tf
);
1883 for (i
= 0; i
< cl_options_count
; i
++)
1884 if (option_affects_pch_p (i
, &state
))
1886 if (memcmp (data
, state
.data
, state
.size
) != 0)
1887 return pch_option_mismatch (cl_options
[i
].opt_text
);
1895 /* Default version of cstore_mode. */
1898 default_cstore_mode (enum insn_code icode
)
1900 return as_a
<scalar_int_mode
> (insn_data
[(int) icode
].operand
[0].mode
);
1903 /* Default version of member_type_forces_blk. */
1906 default_member_type_forces_blk (const_tree
, machine_mode
)
1912 default_load_bounds_for_arg (rtx addr ATTRIBUTE_UNUSED
,
1913 rtx ptr ATTRIBUTE_UNUSED
,
1914 rtx bnd ATTRIBUTE_UNUSED
)
1920 default_store_bounds_for_arg (rtx val ATTRIBUTE_UNUSED
,
1921 rtx addr ATTRIBUTE_UNUSED
,
1922 rtx bounds ATTRIBUTE_UNUSED
,
1923 rtx to ATTRIBUTE_UNUSED
)
1929 default_load_returned_bounds (rtx slot ATTRIBUTE_UNUSED
)
1935 default_store_returned_bounds (rtx slot ATTRIBUTE_UNUSED
,
1936 rtx bounds ATTRIBUTE_UNUSED
)
1941 /* Default version of canonicalize_comparison. */
1944 default_canonicalize_comparison (int *, rtx
*, rtx
*, bool)
1948 /* Default implementation of TARGET_ATOMIC_ASSIGN_EXPAND_FENV. */
1951 default_atomic_assign_expand_fenv (tree
*, tree
*, tree
*)
1955 #ifndef PAD_VARARGS_DOWN
1956 #define PAD_VARARGS_DOWN BYTES_BIG_ENDIAN
1959 /* Build an indirect-ref expression over the given TREE, which represents a
1960 piece of a va_arg() expansion. */
1962 build_va_arg_indirect_ref (tree addr
)
1964 addr
= build_simple_mem_ref_loc (EXPR_LOCATION (addr
), addr
);
1968 /* The "standard" implementation of va_arg: read the value from the
1969 current (padded) address and increment by the (padded) size. */
1972 std_gimplify_va_arg_expr (tree valist
, tree type
, gimple_seq
*pre_p
,
1975 tree addr
, t
, type_size
, rounded_size
, valist_tmp
;
1976 unsigned HOST_WIDE_INT align
, boundary
;
1979 /* All of the alignment and movement below is for args-grow-up machines.
1980 As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all
1981 implement their own specialized gimplify_va_arg_expr routines. */
1982 if (ARGS_GROW_DOWNWARD
)
1985 indirect
= pass_by_reference (NULL
, TYPE_MODE (type
), type
, false);
1987 type
= build_pointer_type (type
);
1989 align
= PARM_BOUNDARY
/ BITS_PER_UNIT
;
1990 boundary
= targetm
.calls
.function_arg_boundary (TYPE_MODE (type
), type
);
1992 /* When we align parameter on stack for caller, if the parameter
1993 alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be
1994 aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee
1995 here with caller. */
1996 if (boundary
> MAX_SUPPORTED_STACK_ALIGNMENT
)
1997 boundary
= MAX_SUPPORTED_STACK_ALIGNMENT
;
1999 boundary
/= BITS_PER_UNIT
;
2001 /* Hoist the valist value into a temporary for the moment. */
2002 valist_tmp
= get_initialized_tmp_var (valist
, pre_p
, NULL
);
2004 /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually
2005 requires greater alignment, we must perform dynamic alignment. */
2006 if (boundary
> align
2007 && !integer_zerop (TYPE_SIZE (type
)))
2009 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist_tmp
,
2010 fold_build_pointer_plus_hwi (valist_tmp
, boundary
- 1));
2011 gimplify_and_add (t
, pre_p
);
2013 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist_tmp
,
2014 fold_build2 (BIT_AND_EXPR
, TREE_TYPE (valist
),
2016 build_int_cst (TREE_TYPE (valist
), -boundary
)));
2017 gimplify_and_add (t
, pre_p
);
2022 /* If the actual alignment is less than the alignment of the type,
2023 adjust the type accordingly so that we don't assume strict alignment
2024 when dereferencing the pointer. */
2025 boundary
*= BITS_PER_UNIT
;
2026 if (boundary
< TYPE_ALIGN (type
))
2028 type
= build_variant_type_copy (type
);
2029 SET_TYPE_ALIGN (type
, boundary
);
2032 /* Compute the rounded size of the type. */
2033 type_size
= size_in_bytes (type
);
2034 rounded_size
= round_up (type_size
, align
);
2036 /* Reduce rounded_size so it's sharable with the postqueue. */
2037 gimplify_expr (&rounded_size
, pre_p
, post_p
, is_gimple_val
, fb_rvalue
);
2041 if (PAD_VARARGS_DOWN
&& !integer_zerop (rounded_size
))
2043 /* Small args are padded downward. */
2044 t
= fold_build2_loc (input_location
, GT_EXPR
, sizetype
,
2045 rounded_size
, size_int (align
));
2046 t
= fold_build3 (COND_EXPR
, sizetype
, t
, size_zero_node
,
2047 size_binop (MINUS_EXPR
, rounded_size
, type_size
));
2048 addr
= fold_build_pointer_plus (addr
, t
);
2051 /* Compute new value for AP. */
2052 t
= fold_build_pointer_plus (valist_tmp
, rounded_size
);
2053 t
= build2 (MODIFY_EXPR
, TREE_TYPE (valist
), valist
, t
);
2054 gimplify_and_add (t
, pre_p
);
2056 addr
= fold_convert (build_pointer_type (type
), addr
);
2059 addr
= build_va_arg_indirect_ref (addr
);
2061 return build_va_arg_indirect_ref (addr
);
2065 default_chkp_bound_type (void)
2067 tree res
= make_node (POINTER_BOUNDS_TYPE
);
2068 TYPE_PRECISION (res
) = TYPE_PRECISION (size_type_node
) * 2;
2069 TYPE_NAME (res
) = get_identifier ("__bounds_type");
2070 SET_TYPE_MODE (res
, targetm
.chkp_bound_mode ());
2076 default_chkp_bound_mode (void)
2082 default_builtin_chkp_function (unsigned int fcode ATTRIBUTE_UNUSED
)
2088 default_chkp_function_value_bounds (const_tree ret_type ATTRIBUTE_UNUSED
,
2089 const_tree fn_decl_or_type ATTRIBUTE_UNUSED
,
2090 bool outgoing ATTRIBUTE_UNUSED
)
2096 default_chkp_make_bounds_constant (HOST_WIDE_INT lb ATTRIBUTE_UNUSED
,
2097 HOST_WIDE_INT ub ATTRIBUTE_UNUSED
)
2103 default_chkp_initialize_bounds (tree var ATTRIBUTE_UNUSED
,
2104 tree lb ATTRIBUTE_UNUSED
,
2105 tree ub ATTRIBUTE_UNUSED
,
2106 tree
*stmts ATTRIBUTE_UNUSED
)
2112 default_setup_incoming_vararg_bounds (cumulative_args_t ca ATTRIBUTE_UNUSED
,
2113 machine_mode mode ATTRIBUTE_UNUSED
,
2114 tree type ATTRIBUTE_UNUSED
,
2115 int *pretend_arg_size ATTRIBUTE_UNUSED
,
2116 int second_time ATTRIBUTE_UNUSED
)
2120 /* An implementation of TARGET_CAN_USE_DOLOOP_P for targets that do
2121 not support nested low-overhead loops. */
2124 can_use_doloop_if_innermost (const widest_int
&, const widest_int
&,
2125 unsigned int loop_depth
, bool)
2127 return loop_depth
== 1;
2130 /* Default implementation of TARGET_OPTAB_SUPPORTED_P. */
2133 default_optab_supported_p (int, machine_mode
, machine_mode
, optimization_type
)
2138 /* Default implementation of TARGET_MAX_NOCE_IFCVT_SEQ_COST. */
2141 default_max_noce_ifcvt_seq_cost (edge e
)
2143 bool predictable_p
= predictable_edge_p (e
);
2145 enum compiler_param param
2147 ? PARAM_MAX_RTL_IF_CONVERSION_PREDICTABLE_COST
2148 : PARAM_MAX_RTL_IF_CONVERSION_UNPREDICTABLE_COST
);
2150 /* If we have a parameter set, use that, otherwise take a guess using
2152 if (global_options_set
.x_param_values
[param
])
2153 return PARAM_VALUE (param
);
2155 return BRANCH_COST (true, predictable_p
) * COSTS_N_INSNS (3);
2158 /* Default implementation of TARGET_MIN_ARITHMETIC_PRECISION. */
2161 default_min_arithmetic_precision (void)
2163 return WORD_REGISTER_OPERATIONS
? BITS_PER_WORD
: BITS_PER_UNIT
;
2166 /* Default implementation of TARGET_C_EXCESS_PRECISION. */
2168 enum flt_eval_method
2169 default_excess_precision (enum excess_precision_type ATTRIBUTE_UNUSED
)
2171 return FLT_EVAL_METHOD_PROMOTE_TO_FLOAT
;
2174 #include "gt-targhooks.h"