1 /* Definitions for code generation pass of GNU compiler.
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* The default branch cost is 1. */
27 /* Macros to access the slots of a QUEUED rtx.
28 Here rather than in rtl.h because only the expansion pass
29 should ever encounter a QUEUED. */
31 /* The variable for which an increment is queued. */
32 #define QUEUED_VAR(P) XEXP (P, 0)
33 /* If the increment has been emitted, this is the insn
34 that does the increment. It is zero before the increment is emitted.
35 If more than one insn is emitted, this is the first insn. */
36 #define QUEUED_INSN(P) XEXP (P, 1)
37 /* If a pre-increment copy has been generated, this is the copy
38 (it is a temporary reg). Zero if no copy made yet. */
39 #define QUEUED_COPY(P) XEXP (P, 2)
40 /* This is the body to use for the insn to do the increment.
41 It is used to emit the increment. */
42 #define QUEUED_BODY(P) XEXP (P, 3)
43 /* Next QUEUED in the queue. */
44 #define QUEUED_NEXT(P) XEXP (P, 4)
46 /* This is the 4th arg to `expand_expr'.
47 EXPAND_SUM means it is ok to return a PLUS rtx or MULT rtx.
48 EXPAND_INITIALIZER is similar but also record any labels on forced_labels.
49 EXPAND_CONST_ADDRESS means it is ok to return a MEM whose address
50 is a constant that is not a legitimate address.
51 EXPAND_MEMORY_USE_* are explained below. */
52 enum expand_modifier
{EXPAND_NORMAL
, EXPAND_SUM
,
53 EXPAND_CONST_ADDRESS
, EXPAND_INITIALIZER
,
54 EXPAND_MEMORY_USE_WO
, EXPAND_MEMORY_USE_RW
,
55 EXPAND_MEMORY_USE_BAD
, EXPAND_MEMORY_USE_DONT
};
57 /* Argument for chkr_* functions.
58 MEMORY_USE_RO: the pointer reads memory.
59 MEMORY_USE_WO: the pointer writes to memory.
60 MEMORY_USE_RW: the pointer modifies memory (ie it reads and writes). An
62 MEMORY_USE_BAD: use this if you don't know the behavior of the pointer, or
63 if you know there are no pointers. Using an INDIRECT_REF
64 with MEMORY_USE_BAD will abort.
65 MEMORY_USE_TW: just test for writing, without update. Special.
66 MEMORY_USE_DONT: the memory is neither read nor written. This is used by
68 enum memory_use_mode
{MEMORY_USE_BAD
= 0, MEMORY_USE_RO
= 1,
69 MEMORY_USE_WO
= 2, MEMORY_USE_RW
= 3,
70 MEMORY_USE_TW
= 6, MEMORY_USE_DONT
= 99};
72 /* Prevent the compiler from deferring stack pops. See
73 inhibit_defer_pop for more information. */
74 #define NO_DEFER_POP (inhibit_defer_pop += 1)
76 /* Allow the compiler to defer stack pops. See inhibit_defer_pop for
78 #define OK_DEFER_POP (inhibit_defer_pop -= 1)
80 #ifdef TREE_CODE /* Don't lose if tree.h not included. */
81 /* Structure to record the size of a sequence of arguments
82 as the sum of a tree-expression and a constant. This structure is
83 also used to store offsets from the stack, which might be negative,
84 so the variable part must be ssizetype, not sizetype. */
88 HOST_WIDE_INT constant
;
93 /* Add the value of the tree INC to the `struct args_size' TO. */
95 #define ADD_PARM_SIZE(TO, INC) \
97 if (host_integerp (inc, 0)) \
98 (TO).constant += tree_low_cst (inc, 0); \
99 else if ((TO).var == 0) \
102 (TO).var = size_binop (PLUS_EXPR, (TO).var, inc); }
104 #define SUB_PARM_SIZE(TO, DEC) \
105 { tree dec = (DEC); \
106 if (host_integerp (dec, 0)) \
107 (TO).constant -= tree_low_cst (dec, 0); \
108 else if ((TO).var == 0) \
109 (TO).var = size_binop (MINUS_EXPR, ssize_int (0), dec); \
111 (TO).var = size_binop (MINUS_EXPR, (TO).var, dec); }
113 /* Convert the implicit sum in a `struct args_size' into a tree
114 of type ssizetype. */
115 #define ARGS_SIZE_TREE(SIZE) \
116 ((SIZE).var == 0 ? ssize_int ((SIZE).constant) \
117 : size_binop (PLUS_EXPR, (SIZE).var, ssize_int ((SIZE).constant)))
119 /* Convert the implicit sum in a `struct args_size' into an rtx. */
120 #define ARGS_SIZE_RTX(SIZE) \
121 ((SIZE).var == 0 ? GEN_INT ((SIZE).constant) \
122 : expand_expr (ARGS_SIZE_TREE (SIZE), NULL_RTX, VOIDmode, \
123 EXPAND_MEMORY_USE_BAD))
125 /* Supply a default definition for FUNCTION_ARG_PADDING:
126 usually pad upward, but pad short args downward on
127 big-endian machines. */
129 enum direction
{none
, upward
, downward
}; /* Value has this type. */
131 #ifndef FUNCTION_ARG_PADDING
132 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
133 (! BYTES_BIG_ENDIAN \
135 : (((MODE) == BLKmode \
136 ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
137 && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
138 : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \
139 ? downward : upward))
142 /* Supply a default definition for FUNCTION_ARG_BOUNDARY. Normally, we let
143 FUNCTION_ARG_PADDING, which also pads the length, handle any needed
146 #ifndef FUNCTION_ARG_BOUNDARY
147 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) PARM_BOUNDARY
150 /* Provide a default value for STRICT_ARGUMENT_NAMING. */
151 #ifndef STRICT_ARGUMENT_NAMING
152 #define STRICT_ARGUMENT_NAMING 0
155 /* Provide a default value for PRETEND_OUTGOING_VARARGS_NAMED. */
156 #ifdef SETUP_INCOMING_VARARGS
157 #ifndef PRETEND_OUTGOING_VARARGS_NAMED
158 #define PRETEND_OUTGOING_VARARGS_NAMED 1
161 /* It is an error to define PRETEND_OUTGOING_VARARGS_NAMED without
162 defining SETUP_INCOMING_VARARGS. */
163 #define PRETEND_OUTGOING_VARARGS_NAMED 0
166 /* Nonzero if we do not know how to pass TYPE solely in registers.
167 We cannot do so in the following cases:
169 - if the type has variable size
170 - if the type is marked as addressable (it is required to be constructed
172 - if the padding and mode of the type is such that a copy into a register
173 would put it into the wrong part of the register.
175 Which padding can't be supported depends on the byte endianness.
177 A value in a register is implicitly padded at the most significant end.
178 On a big-endian machine, that is the lower end in memory.
179 So a value padded in memory at the upper end can't go in a register.
180 For a little-endian machine, the reverse is true. */
182 #ifndef MUST_PASS_IN_STACK
183 #define MUST_PASS_IN_STACK(MODE,TYPE) \
185 && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \
186 || TREE_ADDRESSABLE (TYPE) \
187 || ((MODE) == BLKmode \
188 && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
189 && 0 == (int_size_in_bytes (TYPE) \
190 % (PARM_BOUNDARY / BITS_PER_UNIT))) \
191 && (FUNCTION_ARG_PADDING (MODE, TYPE) \
192 == (BYTES_BIG_ENDIAN ? upward : downward)))))
195 /* Nonzero if type TYPE should be returned in memory.
196 Most machines can use the following default definition. */
198 #ifndef RETURN_IN_MEMORY
199 #define RETURN_IN_MEMORY(TYPE) (TYPE_MODE (TYPE) == BLKmode)
202 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
203 Normally move_insn, so Pmode stack pointer. */
205 #ifndef STACK_SAVEAREA_MODE
206 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
209 /* Supply a default definition of STACK_SIZE_MODE for
210 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */
212 #ifndef STACK_SIZE_MODE
213 #define STACK_SIZE_MODE word_mode
216 /* Provide default values for the macros controlling stack checking. */
218 #ifndef STACK_CHECK_BUILTIN
219 #define STACK_CHECK_BUILTIN 0
222 /* The default interval is one page. */
223 #ifndef STACK_CHECK_PROBE_INTERVAL
224 #define STACK_CHECK_PROBE_INTERVAL 4096
227 /* The default is to do a store into the stack. */
228 #ifndef STACK_CHECK_PROBE_LOAD
229 #define STACK_CHECK_PROBE_LOAD 0
232 /* This value is arbitrary, but should be sufficient for most machines. */
233 #ifndef STACK_CHECK_PROTECT
234 #define STACK_CHECK_PROTECT (75 * UNITS_PER_WORD)
237 /* Make the maximum frame size be the largest we can and still only need
238 one probe per function. */
239 #ifndef STACK_CHECK_MAX_FRAME_SIZE
240 #define STACK_CHECK_MAX_FRAME_SIZE \
241 (STACK_CHECK_PROBE_INTERVAL - UNITS_PER_WORD)
244 /* This is arbitrary, but should be large enough everywhere. */
245 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
246 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
249 /* Provide a reasonable default for the maximum size of an object to
250 allocate in the fixed frame. We may need to be able to make this
251 controllable by the user at some point. */
252 #ifndef STACK_CHECK_MAX_VAR_SIZE
253 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
256 /* Optabs are tables saying how to generate insn bodies
257 for various machine modes and numbers of operands.
258 Each optab applies to one operation.
259 For example, add_optab applies to addition.
261 The insn_code slot is the enum insn_code that says how to
262 generate an insn for this operation on a particular machine mode.
263 It is CODE_FOR_nothing if there is no such insn on the target machine.
265 The `lib_call' slot is the name of the library function that
266 can be used to perform the operation.
268 A few optabs, such as move_optab and cmp_optab, are used
275 enum insn_code insn_code
;
277 } handlers
[NUM_MACHINE_MODES
];
280 /* Given an enum insn_code, access the function to construct
281 the body of that kind of insn. */
282 #define GEN_FCN(CODE) (*insn_data[(int) (CODE)].genfun)
284 /* Enumeration of valid indexes into optab_table. */
292 /* Signed and fp multiply */
295 /* Signed multiply, return high word */
298 /* Signed multiply with result one machine mode wider than args */
305 /* Signed divide-and-remainder in one */
309 /* Signed remainder */
312 /* Optab for floating divide. */
314 /* Convert float to integer in float fmt */
324 /* Arithmetic shift left */
326 /* Logical shift right */
328 /* Arithmetic shift right */
334 /* Signed and floating-point minimum value */
336 /* Signed and floating-point maximum value */
338 /* Unsigned minimum value */
340 /* Unsigned maximum value */
343 /* Move instruction. */
345 /* Move, preserving high part of register. */
348 /* Unary operations */
357 /* Find first bit set */
366 /* Compare insn; two operands. */
368 /* Used only for libcalls for unsigned comparisons. */
370 /* tst insn; compare one operand against 0 */
376 /* Combined compare & jump/store flags/move operations. */
381 /* Push instruction. */
387 extern optab optab_table
[OTI_MAX
];
389 #define add_optab (optab_table[OTI_add])
390 #define sub_optab (optab_table[OTI_sub])
391 #define smul_optab (optab_table[OTI_smul])
392 #define addv_optab (optab_table[OTI_addv])
393 #define subv_optab (optab_table[OTI_subv])
394 #define smul_highpart_optab (optab_table[OTI_smul_highpart])
395 #define umul_highpart_optab (optab_table[OTI_umul_highpart])
396 #define smul_widen_optab (optab_table[OTI_smul_widen])
397 #define umul_widen_optab (optab_table[OTI_umul_widen])
398 #define sdiv_optab (optab_table[OTI_sdiv])
399 #define smulv_optab (optab_table[OTI_smulv])
400 #define sdivv_optab (optab_table[OTI_sdivv])
401 #define sdivmod_optab (optab_table[OTI_sdivmod])
402 #define udiv_optab (optab_table[OTI_udiv])
403 #define udivmod_optab (optab_table[OTI_udivmod])
404 #define smod_optab (optab_table[OTI_smod])
405 #define umod_optab (optab_table[OTI_umod])
406 #define flodiv_optab (optab_table[OTI_flodiv])
407 #define ftrunc_optab (optab_table[OTI_ftrunc])
408 #define and_optab (optab_table[OTI_and])
409 #define ior_optab (optab_table[OTI_ior])
410 #define xor_optab (optab_table[OTI_xor])
411 #define ashl_optab (optab_table[OTI_ashl])
412 #define lshr_optab (optab_table[OTI_lshr])
413 #define ashr_optab (optab_table[OTI_ashr])
414 #define rotl_optab (optab_table[OTI_rotl])
415 #define rotr_optab (optab_table[OTI_rotr])
416 #define smin_optab (optab_table[OTI_smin])
417 #define smax_optab (optab_table[OTI_smax])
418 #define umin_optab (optab_table[OTI_umin])
419 #define umax_optab (optab_table[OTI_umax])
421 #define mov_optab (optab_table[OTI_mov])
422 #define movstrict_optab (optab_table[OTI_movstrict])
424 #define neg_optab (optab_table[OTI_neg])
425 #define negv_optab (optab_table[OTI_negv])
426 #define abs_optab (optab_table[OTI_abs])
427 #define absv_optab (optab_table[OTI_absv])
428 #define one_cmpl_optab (optab_table[OTI_one_cmpl])
429 #define ffs_optab (optab_table[OTI_ffs])
430 #define sqrt_optab (optab_table[OTI_sqrt])
431 #define sin_optab (optab_table[OTI_sin])
432 #define cos_optab (optab_table[OTI_cos])
434 #define cmp_optab (optab_table[OTI_cmp])
435 #define ucmp_optab (optab_table[OTI_ucmp])
436 #define tst_optab (optab_table[OTI_tst])
438 #define strlen_optab (optab_table[OTI_strlen])
440 #define cbranch_optab (optab_table[OTI_cbranch])
441 #define cmov_optab (optab_table[OTI_cmov])
442 #define cstore_optab (optab_table[OTI_cstore])
443 #define push_optab (optab_table[OTI_push])
445 /* Tables of patterns for extending one integer mode to another. */
446 extern enum insn_code extendtab
[MAX_MACHINE_MODE
][MAX_MACHINE_MODE
][2];
448 /* Tables of patterns for converting between fixed and floating point. */
449 extern enum insn_code fixtab
[NUM_MACHINE_MODES
][NUM_MACHINE_MODES
][2];
450 extern enum insn_code fixtrunctab
[NUM_MACHINE_MODES
][NUM_MACHINE_MODES
][2];
451 extern enum insn_code floattab
[NUM_MACHINE_MODES
][NUM_MACHINE_MODES
][2];
453 /* Contains the optab used for each rtx code. */
454 extern optab code_to_optab
[NUM_RTX_CODE
+ 1];
456 /* Passed to expand_binop and expand_unop to say which options to try to use
457 if the requested operation can't be open-coded on the requisite mode.
458 Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using a library call.
459 Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try using a wider mode.
460 OPTAB_MUST_WIDEN says try widening and don't try anything else. */
471 /* Enumeration of indexes into libfunc_table. */
498 LTI_unwind_sjlj_register
,
499 LTI_unwind_sjlj_unregister
,
591 LTI_chkr_copy_bitmap
,
595 LTI_profile_function_entry
,
596 LTI_profile_function_exit
,
601 /* SYMBOL_REF rtx's for the library functions that are called
602 implicitly and not via optabs. */
603 extern rtx libfunc_table
[LTI_MAX
];
605 /* Accessor macros for libfunc_table. */
606 #define extendsfdf2_libfunc (libfunc_table[LTI_extendsfdf2])
607 #define extendsfxf2_libfunc (libfunc_table[LTI_extendsfxf2])
608 #define extendsftf2_libfunc (libfunc_table[LTI_extendsftf2])
609 #define extenddfxf2_libfunc (libfunc_table[LTI_extenddfxf2])
610 #define extenddftf2_libfunc (libfunc_table[LTI_extenddftf2])
612 #define truncdfsf2_libfunc (libfunc_table[LTI_truncdfsf2])
613 #define truncxfsf2_libfunc (libfunc_table[LTI_truncxfsf2])
614 #define trunctfsf2_libfunc (libfunc_table[LTI_trunctfsf2])
615 #define truncxfdf2_libfunc (libfunc_table[LTI_truncxfdf2])
616 #define trunctfdf2_libfunc (libfunc_table[LTI_trunctfdf2])
618 #define memcpy_libfunc (libfunc_table[LTI_memcpy])
619 #define memmove_libfunc (libfunc_table[LTI_memmove])
620 #define bcopy_libfunc (libfunc_table[LTI_bcopy])
621 #define memcmp_libfunc (libfunc_table[LTI_memcmp])
622 #define bcmp_libfunc (libfunc_table[LTI_bcmp])
623 #define memset_libfunc (libfunc_table[LTI_memset])
624 #define bzero_libfunc (libfunc_table[LTI_bzero])
626 #define unwind_resume_libfunc (libfunc_table[LTI_unwind_resume])
627 #define eh_personality_libfunc (libfunc_table[LTI_eh_personality])
628 #define setjmp_libfunc (libfunc_table[LTI_setjmp])
629 #define longjmp_libfunc (libfunc_table[LTI_longjmp])
630 #define unwind_sjlj_register_libfunc (libfunc_table[LTI_unwind_sjlj_register])
631 #define unwind_sjlj_unregister_libfunc \
632 (libfunc_table[LTI_unwind_sjlj_unregister])
634 #define eqhf2_libfunc (libfunc_table[LTI_eqhf2])
635 #define nehf2_libfunc (libfunc_table[LTI_nehf2])
636 #define gthf2_libfunc (libfunc_table[LTI_gthf2])
637 #define gehf2_libfunc (libfunc_table[LTI_gehf2])
638 #define lthf2_libfunc (libfunc_table[LTI_lthf2])
639 #define lehf2_libfunc (libfunc_table[LTI_lehf2])
640 #define unordhf2_libfunc (libfunc_table[LTI_unordhf2])
642 #define eqsf2_libfunc (libfunc_table[LTI_eqsf2])
643 #define nesf2_libfunc (libfunc_table[LTI_nesf2])
644 #define gtsf2_libfunc (libfunc_table[LTI_gtsf2])
645 #define gesf2_libfunc (libfunc_table[LTI_gesf2])
646 #define ltsf2_libfunc (libfunc_table[LTI_ltsf2])
647 #define lesf2_libfunc (libfunc_table[LTI_lesf2])
648 #define unordsf2_libfunc (libfunc_table[LTI_unordsf2])
650 #define eqdf2_libfunc (libfunc_table[LTI_eqdf2])
651 #define nedf2_libfunc (libfunc_table[LTI_nedf2])
652 #define gtdf2_libfunc (libfunc_table[LTI_gtdf2])
653 #define gedf2_libfunc (libfunc_table[LTI_gedf2])
654 #define ltdf2_libfunc (libfunc_table[LTI_ltdf2])
655 #define ledf2_libfunc (libfunc_table[LTI_ledf2])
656 #define unorddf2_libfunc (libfunc_table[LTI_unorddf2])
658 #define eqxf2_libfunc (libfunc_table[LTI_eqxf2])
659 #define nexf2_libfunc (libfunc_table[LTI_nexf2])
660 #define gtxf2_libfunc (libfunc_table[LTI_gtxf2])
661 #define gexf2_libfunc (libfunc_table[LTI_gexf2])
662 #define ltxf2_libfunc (libfunc_table[LTI_ltxf2])
663 #define lexf2_libfunc (libfunc_table[LTI_lexf2])
664 #define unordxf2_libfunc (libfunc_table[LTI_unordxf2])
666 #define eqtf2_libfunc (libfunc_table[LTI_eqtf2])
667 #define netf2_libfunc (libfunc_table[LTI_netf2])
668 #define gttf2_libfunc (libfunc_table[LTI_gttf2])
669 #define getf2_libfunc (libfunc_table[LTI_getf2])
670 #define lttf2_libfunc (libfunc_table[LTI_lttf2])
671 #define letf2_libfunc (libfunc_table[LTI_letf2])
672 #define unordtf2_libfunc (libfunc_table[LTI_unordtf2])
674 #define floatsisf_libfunc (libfunc_table[LTI_floatsisf])
675 #define floatdisf_libfunc (libfunc_table[LTI_floatdisf])
676 #define floattisf_libfunc (libfunc_table[LTI_floattisf])
678 #define floatsidf_libfunc (libfunc_table[LTI_floatsidf])
679 #define floatdidf_libfunc (libfunc_table[LTI_floatdidf])
680 #define floattidf_libfunc (libfunc_table[LTI_floattidf])
682 #define floatsixf_libfunc (libfunc_table[LTI_floatsixf])
683 #define floatdixf_libfunc (libfunc_table[LTI_floatdixf])
684 #define floattixf_libfunc (libfunc_table[LTI_floattixf])
686 #define floatsitf_libfunc (libfunc_table[LTI_floatsitf])
687 #define floatditf_libfunc (libfunc_table[LTI_floatditf])
688 #define floattitf_libfunc (libfunc_table[LTI_floattitf])
690 #define fixsfsi_libfunc (libfunc_table[LTI_fixsfsi])
691 #define fixsfdi_libfunc (libfunc_table[LTI_fixsfdi])
692 #define fixsfti_libfunc (libfunc_table[LTI_fixsfti])
694 #define fixdfsi_libfunc (libfunc_table[LTI_fixdfsi])
695 #define fixdfdi_libfunc (libfunc_table[LTI_fixdfdi])
696 #define fixdfti_libfunc (libfunc_table[LTI_fixdfti])
698 #define fixxfsi_libfunc (libfunc_table[LTI_fixxfsi])
699 #define fixxfdi_libfunc (libfunc_table[LTI_fixxfdi])
700 #define fixxfti_libfunc (libfunc_table[LTI_fixxfti])
702 #define fixtfsi_libfunc (libfunc_table[LTI_fixtfsi])
703 #define fixtfdi_libfunc (libfunc_table[LTI_fixtfdi])
704 #define fixtfti_libfunc (libfunc_table[LTI_fixtfti])
706 #define fixunssfsi_libfunc (libfunc_table[LTI_fixunssfsi])
707 #define fixunssfdi_libfunc (libfunc_table[LTI_fixunssfdi])
708 #define fixunssfti_libfunc (libfunc_table[LTI_fixunssfti])
710 #define fixunsdfsi_libfunc (libfunc_table[LTI_fixunsdfsi])
711 #define fixunsdfdi_libfunc (libfunc_table[LTI_fixunsdfdi])
712 #define fixunsdfti_libfunc (libfunc_table[LTI_fixunsdfti])
714 #define fixunsxfsi_libfunc (libfunc_table[LTI_fixunsxfsi])
715 #define fixunsxfdi_libfunc (libfunc_table[LTI_fixunsxfdi])
716 #define fixunsxfti_libfunc (libfunc_table[LTI_fixunsxfti])
718 #define fixunstfsi_libfunc (libfunc_table[LTI_fixunstfsi])
719 #define fixunstfdi_libfunc (libfunc_table[LTI_fixunstfdi])
720 #define fixunstfti_libfunc (libfunc_table[LTI_fixunstfti])
722 #define chkr_check_addr_libfunc (libfunc_table[LTI_chkr_check_addr])
723 #define chkr_set_right_libfunc (libfunc_table[LTI_chkr_set_right])
724 #define chkr_copy_bitmap_libfunc (libfunc_table[LTI_chkr_copy_bitmap])
725 #define chkr_check_exec_libfunc (libfunc_table[LTI_chkr_check_exec])
726 #define chkr_check_str_libfunc (libfunc_table[LTI_chkr_check_str])
728 #define profile_function_entry_libfunc (libfunc_table[LTI_profile_function_entry])
729 #define profile_function_exit_libfunc (libfunc_table[LTI_profile_function_exit])
731 typedef rtx (*rtxfun
) PARAMS ((rtx
));
733 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
734 gives the gen_function to make a branch to test that condition. */
736 extern rtxfun bcc_gen_fctn
[NUM_RTX_CODE
];
738 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
739 gives the insn code to make a store-condition insn
740 to test that condition. */
742 extern enum insn_code setcc_gen_code
[NUM_RTX_CODE
];
744 #ifdef HAVE_conditional_move
745 /* Indexed by the machine mode, gives the insn code to make a conditional
748 extern enum insn_code movcc_gen_code
[NUM_MACHINE_MODES
];
751 /* This array records the insn_code of insns to perform block moves. */
752 extern enum insn_code movstr_optab
[NUM_MACHINE_MODES
];
754 /* This array records the insn_code of insns to perform block clears. */
755 extern enum insn_code clrstr_optab
[NUM_MACHINE_MODES
];
757 /* Define functions given in optabs.c. */
759 /* Expand a binary operation given optab and rtx operands. */
760 extern rtx expand_binop
PARAMS ((enum machine_mode
, optab
, rtx
, rtx
, rtx
,
761 int, enum optab_methods
));
763 /* Expand a binary operation with both signed and unsigned forms. */
764 extern rtx sign_expand_binop
PARAMS ((enum machine_mode
, optab
, optab
, rtx
,
765 rtx
, rtx
, int, enum optab_methods
));
767 /* Generate code to perform an operation on two operands with two results. */
768 extern int expand_twoval_binop
PARAMS ((optab
, rtx
, rtx
, rtx
, rtx
, int));
770 /* Expand a unary arithmetic operation given optab rtx operand. */
771 extern rtx expand_unop
PARAMS ((enum machine_mode
, optab
, rtx
, rtx
, int));
773 /* Expand the absolute value operation. */
774 extern rtx expand_abs
PARAMS ((enum machine_mode
, rtx
, rtx
, int, int));
776 /* Expand the complex absolute value operation. */
777 extern rtx expand_complex_abs
PARAMS ((enum machine_mode
, rtx
, rtx
, int));
779 /* Generate an instruction with a given INSN_CODE with an output and
781 extern void emit_unop_insn
PARAMS ((int, rtx
, rtx
, enum rtx_code
));
783 /* Emit code to perform a series of operations on a multi-word quantity, one
785 extern rtx emit_no_conflict_block
PARAMS ((rtx
, rtx
, rtx
, rtx
, rtx
));
787 /* Emit code to make a call to a constant function or a library call. */
788 extern void emit_libcall_block
PARAMS ((rtx
, rtx
, rtx
, rtx
));
790 /* Emit one rtl instruction to store zero in specified rtx. */
791 extern void emit_clr_insn
PARAMS ((rtx
));
793 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0. */
794 extern void emit_0_to_1_insn
PARAMS ((rtx
));
796 /* Emit one rtl insn to compare two rtx's. */
797 extern void emit_cmp_insn
PARAMS ((rtx
, rtx
, enum rtx_code
, rtx
,
798 enum machine_mode
, int, unsigned int));
800 /* Emit a pair of rtl insns to compare two rtx's and to jump
801 to a label if the comparison is true. */
802 extern void emit_cmp_and_jump_insns
PARAMS ((rtx
, rtx
, enum rtx_code
, rtx
,
803 enum machine_mode
, int,
806 /* The various uses that a comparison can have; used by can_compare_p:
807 jumps, conditional moves, store flag operations. */
808 enum can_compare_purpose
815 /* Nonzero if a compare of mode MODE can be done straightforwardly
816 (without splitting it into pieces). */
817 extern int can_compare_p
PARAMS ((enum rtx_code
, enum machine_mode
,
818 enum can_compare_purpose
));
820 extern void prepare_cmp_insn
PARAMS ((rtx
*, rtx
*, enum rtx_code
*, rtx
,
821 enum machine_mode
*, int *, int,
822 enum can_compare_purpose
));
824 extern rtx prepare_operand
PARAMS ((int, rtx
, int, enum machine_mode
,
825 enum machine_mode
, int));
827 /* Generate code to indirectly jump to a location given in the rtx LOC. */
828 extern void emit_indirect_jump
PARAMS ((rtx
));
830 #ifdef HAVE_conditional_move
831 /* Emit a conditional move operation. */
832 rtx emit_conditional_move
PARAMS ((rtx
, enum rtx_code
, rtx
, rtx
,
833 enum machine_mode
, rtx
, rtx
,
834 enum machine_mode
, int));
836 /* Return non-zero if the conditional move is supported. */
837 int can_conditionally_move_p
PARAMS ((enum machine_mode mode
));
841 /* Create but don't emit one rtl instruction to add one rtx into another.
842 Modes must match; operands must meet the operation's predicates.
843 Likewise for subtraction and for just copying.
844 These do not call protect_from_queue; caller must do so. */
845 extern rtx gen_add2_insn
PARAMS ((rtx
, rtx
));
846 extern rtx gen_sub2_insn
PARAMS ((rtx
, rtx
));
847 extern rtx gen_move_insn
PARAMS ((rtx
, rtx
));
848 extern int have_add2_insn
PARAMS ((rtx
, rtx
));
849 extern int have_sub2_insn
PARAMS ((rtx
, rtx
));
851 /* Return the INSN_CODE to use for an extend operation. */
852 extern enum insn_code can_extend_p
PARAMS ((enum machine_mode
,
853 enum machine_mode
, int));
855 /* Generate the body of an insn to extend Y (with mode MFROM)
856 into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */
857 extern rtx gen_extend_insn
PARAMS ((rtx
, rtx
, enum machine_mode
,
858 enum machine_mode
, int));
860 /* Initialize the tables that control conversion between fixed and
862 extern void init_fixtab
PARAMS ((void));
863 extern void init_floattab
PARAMS ((void));
865 /* Generate code for a FLOAT_EXPR. */
866 extern void expand_float
PARAMS ((rtx
, rtx
, int));
868 /* Generate code for a FIX_EXPR. */
869 extern void expand_fix
PARAMS ((rtx
, rtx
, int));
871 /* Call this to initialize an optab function entry. */
872 extern rtx init_one_libfunc
PARAMS ((const char *));
874 /* Call this once to initialize the contents of the optabs
875 appropriately for the current target machine. */
876 extern void init_optabs
PARAMS ((void));
878 /* Functions from expmed.c: */
880 /* Arguments MODE, RTX: return an rtx for the negation of that value.
882 extern rtx negate_rtx
PARAMS ((enum machine_mode
, rtx
));
884 /* Expand a logical AND operation. */
885 extern rtx expand_and
PARAMS ((rtx
, rtx
, rtx
));
887 /* Emit a store-flag operation. */
888 extern rtx emit_store_flag
PARAMS ((rtx
, enum rtx_code
, rtx
, rtx
,
889 enum machine_mode
, int, int));
891 /* Like emit_store_flag, but always succeeds. */
892 extern rtx emit_store_flag_force
PARAMS ((rtx
, enum rtx_code
, rtx
, rtx
,
893 enum machine_mode
, int, int));
895 /* Functions from loop.c: */
897 /* Given an insn and condition, return a canonical description of
898 the test being made. */
899 extern rtx canonicalize_condition
PARAMS ((rtx
, rtx
, int, rtx
*, rtx
));
901 /* Given a JUMP_INSN, return a canonical description of the test
903 extern rtx get_condition
PARAMS ((rtx
, rtx
*));
905 /* Generate a conditional trap instruction. */
906 extern rtx gen_cond_trap
PARAMS ((enum rtx_code
, rtx
, rtx
, rtx
));
908 /* Functions from builtins.c: */
910 extern rtx expand_builtin
PARAMS ((tree
, rtx
, rtx
, enum machine_mode
, int));
911 extern void std_expand_builtin_va_start
PARAMS ((int, tree
, rtx
));
912 extern rtx std_expand_builtin_va_arg
PARAMS ((tree
, tree
));
913 extern rtx expand_builtin_va_arg
PARAMS ((tree
, tree
));
914 extern void default_init_builtins
PARAMS ((void));
915 extern rtx default_expand_builtin
PARAMS ((tree
, rtx
, rtx
,
916 enum machine_mode
, int));
919 extern void expand_builtin_setjmp_setup
PARAMS ((rtx
, rtx
));
920 extern void expand_builtin_setjmp_receiver
PARAMS ((rtx
));
921 extern void expand_builtin_longjmp
PARAMS ((rtx
, rtx
));
922 extern rtx expand_builtin_saveregs
PARAMS ((void));
923 extern HOST_WIDE_INT get_varargs_alias_set
PARAMS ((void));
924 extern HOST_WIDE_INT get_frame_alias_set
PARAMS ((void));
925 extern void record_base_value
PARAMS ((unsigned int, rtx
, int));
926 extern void record_alias_subset
PARAMS ((HOST_WIDE_INT
,
928 extern HOST_WIDE_INT new_alias_set
PARAMS ((void));
930 /* Functions from expr.c: */
932 /* This is run once per compilation to set up which modes can be used
933 directly in memory and to initialize the block move optab. */
934 extern void init_expr_once
PARAMS ((void));
936 /* This is run at the start of compiling a function. */
937 extern void init_expr
PARAMS ((void));
939 /* This function is run once to initialize stor-layout.c. */
941 extern void init_stor_layout_once
PARAMS ((void));
943 /* This is run at the end of compiling a function. */
944 extern void finish_expr_for_function
PARAMS ((void));
946 /* Use protect_from_queue to convert a QUEUED expression
947 into something that you can put immediately into an instruction. */
948 extern rtx protect_from_queue
PARAMS ((rtx
, int));
950 /* Perform all the pending incrementations. */
951 extern void emit_queue
PARAMS ((void));
953 /* Tell if something has a queued subexpression. */
954 extern int queued_subexp_p
PARAMS ((rtx
));
956 /* Emit some rtl insns to move data between rtx's, converting machine modes.
957 Both modes must be floating or both fixed. */
958 extern void convert_move
PARAMS ((rtx
, rtx
, int));
960 /* Convert an rtx to specified machine mode and return the result. */
961 extern rtx convert_to_mode
PARAMS ((enum machine_mode
, rtx
, int));
963 /* Convert an rtx to MODE from OLDMODE and return the result. */
964 extern rtx convert_modes
PARAMS ((enum machine_mode
, enum machine_mode
,
967 /* Emit code to move a block Y to a block X. */
968 extern rtx emit_block_move
PARAMS ((rtx
, rtx
, rtx
, unsigned int));
970 /* Copy all or part of a value X into registers starting at REGNO.
971 The number of registers to be filled is NREGS. */
972 extern void move_block_to_reg
PARAMS ((int, rtx
, int, enum machine_mode
));
974 /* Copy all or part of a BLKmode value X out of registers starting at REGNO.
975 The number of registers to be filled is NREGS. */
976 extern void move_block_from_reg
PARAMS ((int, rtx
, int, int));
978 /* Load a BLKmode value into non-consecutive registers represented by a
980 extern void emit_group_load
PARAMS ((rtx
, rtx
, int, unsigned int));
982 /* Store a BLKmode value from non-consecutive registers represented by a
984 extern void emit_group_store
PARAMS ((rtx
, rtx
, int, unsigned int));
987 /* Copy BLKmode object from a set of registers. */
988 extern rtx copy_blkmode_from_reg
PARAMS ((rtx
,rtx
,tree
));
991 /* Mark REG as holding a parameter for the next CALL_INSN. */
992 extern void use_reg
PARAMS ((rtx
*, rtx
));
994 /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters
995 for the next CALL_INSN. */
996 extern void use_regs
PARAMS ((rtx
*, int, int));
998 /* Mark a PARALLEL as holding a parameter for the next CALL_INSN. */
999 extern void use_group_regs
PARAMS ((rtx
*, rtx
));
1001 /* Write zeros through the storage of OBJECT.
1002 If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is its
1004 extern rtx clear_storage
PARAMS ((rtx
, rtx
, unsigned int));
1006 /* Return non-zero if it is desirable to store LEN bytes generated by
1007 CONSTFUN with several move instructions by store_by_pieces
1008 function. CONSTFUNDATA is a pointer which will be passed as argument
1009 in every CONSTFUN call.
1010 ALIGN is maximum alignment we can assume. */
1011 extern int can_store_by_pieces
PARAMS ((unsigned HOST_WIDE_INT
,
1012 rtx (*) (PTR
, HOST_WIDE_INT
,
1014 PTR
, unsigned int));
1016 /* Generate several move instructions to store LEN bytes generated by
1017 CONSTFUN to block TO. (A MEM rtx with BLKmode). CONSTFUNDATA is a
1018 pointer which will be passed as argument in every CONSTFUN call.
1019 ALIGN is maximum alignment we can assume. */
1020 extern void store_by_pieces
PARAMS ((rtx
, unsigned HOST_WIDE_INT
,
1021 rtx (*) (PTR
, HOST_WIDE_INT
,
1023 PTR
, unsigned int));
1025 /* Emit insns to set X from Y. */
1026 extern rtx emit_move_insn
PARAMS ((rtx
, rtx
));
1028 /* Emit insns to set X from Y, with no frills. */
1029 extern rtx emit_move_insn_1
PARAMS ((rtx
, rtx
));
1031 /* Push a block of length SIZE (perhaps variable)
1032 and return an rtx to address the beginning of the block. */
1033 extern rtx push_block
PARAMS ((rtx
, int, int));
1036 /* Generate code to push something onto the stack, given its mode and type. */
1037 extern void emit_push_insn
PARAMS ((rtx
, enum machine_mode
, tree
, rtx
,
1038 unsigned int, int, rtx
, int, rtx
, rtx
,
1041 /* Expand an assignment that stores the value of FROM into TO. */
1042 extern rtx expand_assignment
PARAMS ((tree
, tree
, int, int));
1044 /* Generate code for computing expression EXP,
1045 and storing the value into TARGET.
1046 If SUGGEST_REG is nonzero, copy the value through a register
1047 and return that register, if that is possible. */
1048 extern rtx store_expr
PARAMS ((tree
, rtx
, int));
1051 /* Given an rtx that may include add and multiply operations,
1052 generate them as insns and return a pseudo-reg containing the value.
1053 Useful after calling expand_expr with 1 as sum_ok. */
1054 extern rtx force_operand
PARAMS ((rtx
, rtx
));
1057 /* Generate code for computing expression EXP.
1058 An rtx for the computed value is returned. The value is never null.
1059 In the case of a void EXP, const0_rtx is returned. */
1060 extern rtx expand_expr
PARAMS ((tree
, rtx
, enum machine_mode
,
1061 enum expand_modifier
));
1064 /* At the start of a function, record that we have no previously-pushed
1065 arguments waiting to be popped. */
1066 extern void init_pending_stack_adjust
PARAMS ((void));
1068 /* When exiting from function, if safe, clear out any pending stack adjust
1069 so the adjustment won't get done. */
1070 extern void clear_pending_stack_adjust
PARAMS ((void));
1072 /* Pop any previously-pushed arguments that have not been popped yet. */
1073 extern void do_pending_stack_adjust
PARAMS ((void));
1076 /* Return the tree node and offset if a given argument corresponds to
1077 a string constant. */
1078 extern tree string_constant
PARAMS ((tree
, tree
*));
1080 /* Generate code to evaluate EXP and jump to LABEL if the value is zero. */
1081 extern void jumpifnot
PARAMS ((tree
, rtx
));
1083 /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */
1084 extern void jumpif
PARAMS ((tree
, rtx
));
1086 /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if
1087 the result is zero, or IF_TRUE_LABEL if the result is one. */
1088 extern void do_jump
PARAMS ((tree
, rtx
, rtx
));
1091 /* Generate rtl to compare two rtx's, will call emit_cmp_insn. */
1092 extern rtx compare_from_rtx
PARAMS ((rtx
, rtx
, enum rtx_code
, int,
1093 enum machine_mode
, rtx
, unsigned int));
1094 extern void do_compare_rtx_and_jump
PARAMS ((rtx
, rtx
, enum rtx_code
, int,
1095 enum machine_mode
, rtx
,
1096 unsigned int, rtx
, rtx
));
1098 /* Generate a tablejump instruction (used for switch statements). */
1099 extern void do_tablejump
PARAMS ((rtx
, enum machine_mode
, rtx
, rtx
, rtx
));
1102 /* rtl.h and tree.h were included. */
1103 /* Return an rtx for the size in bytes of the value of an expr. */
1104 extern rtx expr_size
PARAMS ((tree
));
1106 extern rtx lookup_static_chain
PARAMS ((tree
));
1108 /* Convert a stack slot address ADDR valid in function FNDECL
1109 into an address valid in this function (using a static chain). */
1110 extern rtx fix_lexical_addr
PARAMS ((rtx
, tree
));
1112 /* Return the address of the trampoline for entering nested fn FUNCTION. */
1113 extern rtx trampoline_address
PARAMS ((tree
));
1115 /* Return an rtx that refers to the value returned by a function
1116 in its original home. This becomes invalid if any more code is emitted. */
1117 extern rtx hard_function_value
PARAMS ((tree
, tree
, int));
1119 extern rtx prepare_call_address
PARAMS ((rtx
, tree
, rtx
*, int, int));
1121 extern rtx expand_call
PARAMS ((tree
, rtx
, int));
1123 extern rtx expand_shift
PARAMS ((enum tree_code
, enum machine_mode
, rtx
, tree
,
1125 extern rtx expand_divmod
PARAMS ((int, enum tree_code
, enum machine_mode
, rtx
,
1127 extern void locate_and_pad_parm
PARAMS ((enum machine_mode
, tree
, int, tree
,
1131 struct args_size
*));
1132 extern rtx expand_inline_function
PARAMS ((tree
, tree
, rtx
, int, tree
, rtx
));
1134 /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary. */
1135 extern rtx label_rtx
PARAMS ((tree
));
1138 /* Indicate how an input argument register was promoted. */
1139 extern rtx promoted_input_arg
PARAMS ((unsigned int, enum machine_mode
*,
1142 /* Return an rtx like arg but sans any constant terms.
1143 Returns the original rtx if it has no constant terms.
1144 The constant terms are added and stored via a second arg. */
1145 extern rtx eliminate_constant_term
PARAMS ((rtx
, rtx
*));
1147 /* Convert arg to a valid memory address for specified machine mode,
1148 by emitting insns to perform arithmetic if nec. */
1149 extern rtx memory_address
PARAMS ((enum machine_mode
, rtx
));
1151 /* Like `memory_address' but pretent `flag_force_addr' is 0. */
1152 extern rtx memory_address_noforce
PARAMS ((enum machine_mode
, rtx
));
1154 /* Return a memory reference like MEMREF, but with its mode changed
1155 to MODE and its address changed to ADDR.
1156 (VOIDmode means don't change the mode.
1157 NULL for ADDR means don't change the address.)
1158 VALIDATE is nonzero if the returned memory location is required to be
1160 extern rtx change_address_1
PARAMS ((rtx
, enum machine_mode
, rtx
, int));
1162 #define change_address(MEMREF, MODE, ADDR) \
1163 change_address_1 (MEMREF, MODE, ADDR, 1)
1165 /* Return a memory reference like MEMREF, but with its mode changed
1166 to MODE and its address offset by OFFSET bytes. */
1167 extern rtx adjust_address
PARAMS ((rtx
, enum machine_mode
, HOST_WIDE_INT
));
1169 /* Likewise, but the reference is not required to be valid. */
1170 extern rtx adjust_address_nv
PARAMS ((rtx
, enum machine_mode
, HOST_WIDE_INT
));
1172 /* Return a memory reference like MEMREF, but with its address changed to
1173 ADDR. The caller is asserting that the actual piece of memory pointed
1174 to is the same, just the form of the address is being changed, such as
1175 by putting something into a register. */
1176 extern rtx replace_equiv_address
PARAMS ((rtx
, rtx
));
1178 /* Likewise, but the reference is not required to be valid. */
1179 extern rtx replace_equiv_address_nv
PARAMS ((rtx
, rtx
));
1181 /* Return a memory reference like MEMREF, but which is known to have a
1183 extern rtx validize_mem
PARAMS ((rtx
));
1186 /* Given REF, either a MEM or a REG, and T, either the type of X or
1187 the expression corresponding to REF, set RTX_UNCHANGING_P if
1189 extern void maybe_set_unchanging
PARAMS ((rtx
, tree
));
1191 /* Given REF, a MEM, and T, either the type of X or the expression
1192 corresponding to REF, set the memory attributes. OBJECTP is nonzero
1193 if we are making a new object of this type. */
1194 extern void set_mem_attributes
PARAMS ((rtx
, tree
, int));
1197 /* Assemble the static constant template for function entry trampolines. */
1198 extern rtx assemble_trampoline_template
PARAMS ((void));
1200 /* Given rtx, return new rtx whose address won't be affected by
1201 any side effects. It has been copied to a new temporary reg. */
1202 extern rtx stabilize
PARAMS ((rtx
));
1204 /* Given an rtx, copy all regs it refers to into new temps
1205 and return a modified copy that refers to the new temps. */
1206 extern rtx copy_all_regs
PARAMS ((rtx
));
1208 /* Copy given rtx to a new temp reg and return that. */
1209 extern rtx copy_to_reg
PARAMS ((rtx
));
1211 /* Like copy_to_reg but always make the reg Pmode. */
1212 extern rtx copy_addr_to_reg
PARAMS ((rtx
));
1214 /* Like copy_to_reg but always make the reg the specified mode MODE. */
1215 extern rtx copy_to_mode_reg
PARAMS ((enum machine_mode
, rtx
));
1217 /* Copy given rtx to given temp reg and return that. */
1218 extern rtx copy_to_suggested_reg
PARAMS ((rtx
, rtx
, enum machine_mode
));
1220 /* Copy a value to a register if it isn't already a register.
1221 Args are mode (in case value is a constant) and the value. */
1222 extern rtx force_reg
PARAMS ((enum machine_mode
, rtx
));
1224 /* Return given rtx, copied into a new temp reg if it was in memory. */
1225 extern rtx force_not_mem
PARAMS ((rtx
));
1228 /* Return mode and signedness to use when object is promoted. */
1229 extern enum machine_mode promote_mode
PARAMS ((tree
, enum machine_mode
,
1233 /* Remove some bytes from the stack. An rtx says how many. */
1234 extern void adjust_stack
PARAMS ((rtx
));
1236 /* Add some bytes to the stack. An rtx says how many. */
1237 extern void anti_adjust_stack
PARAMS ((rtx
));
1239 /* This enum is used for the following two functions. */
1240 enum save_level
{SAVE_BLOCK
, SAVE_FUNCTION
, SAVE_NONLOCAL
};
1242 /* Save the stack pointer at the specified level. */
1243 extern void emit_stack_save
PARAMS ((enum save_level
, rtx
*, rtx
));
1245 /* Restore the stack pointer from a save area of the specified level. */
1246 extern void emit_stack_restore
PARAMS ((enum save_level
, rtx
, rtx
));
1248 /* Allocate some space on the stack dynamically and return its address. An rtx
1249 says how many bytes. */
1250 extern rtx allocate_dynamic_stack_space
PARAMS ((rtx
, rtx
, int));
1252 /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive.
1253 FIRST is a constant and size is a Pmode RTX. These are offsets from the
1254 current stack pointer. STACK_GROWS_DOWNWARD says whether to add or
1255 subtract from the stack. If SIZE is constant, this is done
1256 with a fixed number of probes. Otherwise, we must make a loop. */
1257 extern void probe_stack_range
PARAMS ((HOST_WIDE_INT
, rtx
));
1259 /* Return an rtx that refers to the value returned by a library call
1260 in its original home. This becomes invalid if any more code is emitted. */
1261 extern rtx hard_libcall_value
PARAMS ((enum machine_mode
));
1263 /* Given an rtx, return an rtx for a value rounded up to a multiple
1264 of STACK_BOUNDARY / BITS_PER_UNIT. */
1265 extern rtx round_push
PARAMS ((rtx
));
1267 extern rtx store_bit_field
PARAMS ((rtx
, unsigned HOST_WIDE_INT
,
1268 unsigned HOST_WIDE_INT
,
1269 enum machine_mode
, rtx
,
1270 unsigned int, HOST_WIDE_INT
));
1271 extern rtx extract_bit_field
PARAMS ((rtx
, unsigned HOST_WIDE_INT
,
1272 unsigned HOST_WIDE_INT
, int, rtx
,
1273 enum machine_mode
, enum machine_mode
,
1274 unsigned int, HOST_WIDE_INT
));
1275 extern rtx expand_mult
PARAMS ((enum machine_mode
, rtx
, rtx
, rtx
, int));
1276 extern rtx expand_mult_add
PARAMS ((rtx
, rtx
, rtx
, rtx
,enum machine_mode
, int));
1277 extern rtx expand_mult_highpart_adjust
PARAMS ((enum machine_mode
, rtx
, rtx
, rtx
, rtx
, int));
1279 extern rtx assemble_static_space
PARAMS ((int));
1281 /* Hook called by expand_expr for language-specific tree codes.
1282 It is up to the language front end to install a hook
1283 if it has any such codes that expand_expr needs to know about. */
1284 extern rtx (*lang_expand_expr
) PARAMS ((union tree_node
*, rtx
,
1286 enum expand_modifier modifier
));
1289 /* Hook called by output_constant for language-specific tree codes.
1290 It is up to the language front-end to install a hook if it has any
1291 such codes that output_constant needs to know about. Returns a
1292 language-independent constant equivalent to its input. */
1293 extern tree (*lang_expand_constant
) PARAMS ((tree
));
1295 extern int safe_from_p
PARAMS ((rtx
, tree
, int));
1297 /* Hook called by safe_from_p for language-specific tree codes. It is
1298 up to the language front-end to install a hook if it has any such
1299 codes that safe_from_p needs to know about. Since same_from_p will
1300 recursively explore the TREE_OPERANDs of an expression, this hook
1301 should not reexamine those pieces. This routine may recursively
1302 call safe_from_p; it should always pass `0' as the TOP_P
1304 extern int (*lang_safe_from_p
) PARAMS ((rtx
, tree
));
1307 extern void init_all_optabs
PARAMS ((void));
1308 extern void do_jump_by_parts_equality_rtx
PARAMS ((rtx
, rtx
, rtx
));
1309 extern void do_jump_by_parts_greater_rtx
PARAMS ((enum machine_mode
,
1313 #ifdef TREE_CODE /* Don't lose if tree.h not included. */
1314 extern void mark_seen_cases
PARAMS ((tree
, unsigned char *,
1315 HOST_WIDE_INT
, int));