1 | /* Definitions for code generation pass of GNU compiler. |
---|
2 | Copyright (C) 1987, 91, 92, 93, 94, 1995 Free Software Foundation, Inc. |
---|
3 | |
---|
4 | This file is part of GNU CC. |
---|
5 | |
---|
6 | GNU CC is free software; you can redistribute it and/or modify |
---|
7 | it under the terms of the GNU General Public License as published by |
---|
8 | the Free Software Foundation; either version 2, or (at your option) |
---|
9 | any later version. |
---|
10 | |
---|
11 | GNU CC is distributed in the hope that it will be useful, |
---|
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
14 | GNU General Public License for more details. |
---|
15 | |
---|
16 | You should have received a copy of the GNU General Public License |
---|
17 | along with GNU CC; see the file COPYING. If not, write to |
---|
18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
---|
19 | Boston, MA 02111-1307, USA. */ |
---|
20 | |
---|
21 | |
---|
22 | #ifndef __STDC__ |
---|
23 | #ifndef const |
---|
24 | #define const |
---|
25 | #endif |
---|
26 | #endif |
---|
27 | |
---|
28 | /* The default branch cost is 1. */ |
---|
29 | #ifndef BRANCH_COST |
---|
30 | #define BRANCH_COST 1 |
---|
31 | #endif |
---|
32 | |
---|
33 | /* Macros to access the slots of a QUEUED rtx. |
---|
34 | Here rather than in rtl.h because only the expansion pass |
---|
35 | should ever encounter a QUEUED. */ |
---|
36 | |
---|
37 | /* The variable for which an increment is queued. */ |
---|
38 | #define QUEUED_VAR(P) XEXP (P, 0) |
---|
39 | /* If the increment has been emitted, this is the insn |
---|
40 | that does the increment. It is zero before the increment is emitted. */ |
---|
41 | #define QUEUED_INSN(P) XEXP (P, 1) |
---|
42 | /* If a pre-increment copy has been generated, this is the copy |
---|
43 | (it is a temporary reg). Zero if no copy made yet. */ |
---|
44 | #define QUEUED_COPY(P) XEXP (P, 2) |
---|
45 | /* This is the body to use for the insn to do the increment. |
---|
46 | It is used to emit the increment. */ |
---|
47 | #define QUEUED_BODY(P) XEXP (P, 3) |
---|
48 | /* Next QUEUED in the queue. */ |
---|
49 | #define QUEUED_NEXT(P) XEXP (P, 4) |
---|
50 | |
---|
51 | /* This is the 4th arg to `expand_expr'. |
---|
52 | EXPAND_SUM means it is ok to return a PLUS rtx or MULT rtx. |
---|
53 | EXPAND_INITIALIZER is similar but also record any labels on forced_labels. |
---|
54 | EXPAND_CONST_ADDRESS means it is ok to return a MEM whose address |
---|
55 | is a constant that is not a legitimate address. */ |
---|
56 | enum expand_modifier {EXPAND_NORMAL, EXPAND_SUM, |
---|
57 | EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER}; |
---|
58 | |
---|
59 | /* List of labels that must never be deleted. */ |
---|
60 | extern rtx forced_labels; |
---|
61 | |
---|
62 | /* List (chain of EXPR_LISTs) of pseudo-regs of SAVE_EXPRs. |
---|
63 | So we can mark them all live at the end of the function, if stupid. */ |
---|
64 | extern rtx save_expr_regs; |
---|
65 | |
---|
66 | extern int current_function_calls_alloca; |
---|
67 | extern int current_function_outgoing_args_size; |
---|
68 | |
---|
69 | /* This is the offset from the arg pointer to the place where the first |
---|
70 | anonymous arg can be found, if there is one. */ |
---|
71 | extern rtx current_function_arg_offset_rtx; |
---|
72 | |
---|
73 | /* This is nonzero if the current function uses the constant pool. */ |
---|
74 | extern int current_function_uses_const_pool; |
---|
75 | |
---|
76 | /* This is nonzero if the current function uses pic_offset_table_rtx. */ |
---|
77 | extern int current_function_uses_pic_offset_table; |
---|
78 | |
---|
79 | /* The arg pointer hard register, or the pseudo into which it was copied. */ |
---|
80 | extern rtx current_function_internal_arg_pointer; |
---|
81 | |
---|
82 | /* Nonzero means stack pops must not be deferred, and deferred stack |
---|
83 | pops must not be output. It is nonzero inside a function call, |
---|
84 | inside a conditional expression, inside a statement expression, |
---|
85 | and in other cases as well. */ |
---|
86 | extern int inhibit_defer_pop; |
---|
87 | |
---|
88 | /* Number of function calls seen so far in current function. */ |
---|
89 | |
---|
90 | extern int function_call_count; |
---|
91 | |
---|
92 | /* RTX for stack slot that holds the current handler for nonlocal gotos. |
---|
93 | Zero when function does not have nonlocal labels. */ |
---|
94 | |
---|
95 | extern rtx nonlocal_goto_handler_slot; |
---|
96 | |
---|
97 | /* RTX for stack slot that holds the stack pointer value to restore |
---|
98 | for a nonlocal goto. |
---|
99 | Zero when function does not have nonlocal labels. */ |
---|
100 | |
---|
101 | extern rtx nonlocal_goto_stack_level; |
---|
102 | |
---|
103 | /* List (chain of TREE_LIST) of LABEL_DECLs for all nonlocal labels |
---|
104 | (labels to which there can be nonlocal gotos from nested functions) |
---|
105 | in this function. */ |
---|
106 | |
---|
107 | #ifdef TREE_CODE /* Don't lose if tree.h not included. */ |
---|
108 | extern tree nonlocal_labels; |
---|
109 | #endif |
---|
110 | |
---|
111 | #define NO_DEFER_POP (inhibit_defer_pop += 1) |
---|
112 | #define OK_DEFER_POP (inhibit_defer_pop -= 1) |
---|
113 | |
---|
114 | /* Number of units that we should eventually pop off the stack. |
---|
115 | These are the arguments to function calls that have already returned. */ |
---|
116 | extern int pending_stack_adjust; |
---|
117 | |
---|
118 | /* A list of all cleanups which belong to the arguments of |
---|
119 | function calls being expanded by expand_call. */ |
---|
120 | #ifdef TREE_CODE /* Don't lose if tree.h not included. */ |
---|
121 | extern tree cleanups_this_call; |
---|
122 | #endif |
---|
123 | |
---|
124 | /* When temporaries are created by TARGET_EXPRs, they are created at |
---|
125 | this level of temp_slot_level, so that they can remain allocated |
---|
126 | until no longer needed. CLEANUP_POINT_EXPRs define the lifetime |
---|
127 | of TARGET_EXPRs. */ |
---|
128 | extern int target_temp_slot_level; |
---|
129 | |
---|
130 | #ifdef TREE_CODE /* Don't lose if tree.h not included. */ |
---|
131 | /* Structure to record the size of a sequence of arguments |
---|
132 | as the sum of a tree-expression and a constant. */ |
---|
133 | |
---|
134 | struct args_size |
---|
135 | { |
---|
136 | int constant; |
---|
137 | tree var; |
---|
138 | }; |
---|
139 | #endif |
---|
140 | |
---|
141 | /* Add the value of the tree INC to the `struct args_size' TO. */ |
---|
142 | |
---|
143 | #define ADD_PARM_SIZE(TO, INC) \ |
---|
144 | { tree inc = (INC); \ |
---|
145 | if (TREE_CODE (inc) == INTEGER_CST) \ |
---|
146 | (TO).constant += TREE_INT_CST_LOW (inc); \ |
---|
147 | else if ((TO).var == 0) \ |
---|
148 | (TO).var = inc; \ |
---|
149 | else \ |
---|
150 | (TO).var = size_binop (PLUS_EXPR, (TO).var, inc); } |
---|
151 | |
---|
152 | #define SUB_PARM_SIZE(TO, DEC) \ |
---|
153 | { tree dec = (DEC); \ |
---|
154 | if (TREE_CODE (dec) == INTEGER_CST) \ |
---|
155 | (TO).constant -= TREE_INT_CST_LOW (dec); \ |
---|
156 | else if ((TO).var == 0) \ |
---|
157 | (TO).var = size_binop (MINUS_EXPR, integer_zero_node, dec); \ |
---|
158 | else \ |
---|
159 | (TO).var = size_binop (MINUS_EXPR, (TO).var, dec); } |
---|
160 | |
---|
161 | /* Convert the implicit sum in a `struct args_size' into an rtx. */ |
---|
162 | #define ARGS_SIZE_RTX(SIZE) \ |
---|
163 | ((SIZE).var == 0 ? GEN_INT ((SIZE).constant) \ |
---|
164 | : expand_expr (size_binop (PLUS_EXPR, (SIZE).var, \ |
---|
165 | size_int ((SIZE).constant)), \ |
---|
166 | NULL_RTX, VOIDmode, 0)) |
---|
167 | |
---|
168 | /* Convert the implicit sum in a `struct args_size' into a tree. */ |
---|
169 | #define ARGS_SIZE_TREE(SIZE) \ |
---|
170 | ((SIZE).var == 0 ? size_int ((SIZE).constant) \ |
---|
171 | : size_binop (PLUS_EXPR, (SIZE).var, size_int ((SIZE).constant))) |
---|
172 | |
---|
173 | /* Supply a default definition for FUNCTION_ARG_PADDING: |
---|
174 | usually pad upward, but pad short args downward on |
---|
175 | big-endian machines. */ |
---|
176 | |
---|
177 | enum direction {none, upward, downward}; /* Value has this type. */ |
---|
178 | |
---|
179 | #ifndef FUNCTION_ARG_PADDING |
---|
180 | #define FUNCTION_ARG_PADDING(MODE, TYPE) \ |
---|
181 | (! BYTES_BIG_ENDIAN \ |
---|
182 | ? upward \ |
---|
183 | : (((MODE) == BLKmode \ |
---|
184 | ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ |
---|
185 | && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \ |
---|
186 | : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \ |
---|
187 | ? downward : upward)) |
---|
188 | #endif |
---|
189 | |
---|
190 | /* Supply a default definition for FUNCTION_ARG_BOUNDARY. Normally, we let |
---|
191 | FUNCTION_ARG_PADDING, which also pads the length, handle any needed |
---|
192 | alignment. */ |
---|
193 | |
---|
194 | #ifndef FUNCTION_ARG_BOUNDARY |
---|
195 | #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) PARM_BOUNDARY |
---|
196 | #endif |
---|
197 | |
---|
198 | /* Nonzero if we do not know how to pass TYPE solely in registers. |
---|
199 | We cannot do so in the following cases: |
---|
200 | |
---|
201 | - if the type has variable size |
---|
202 | - if the type is marked as addressable (it is required to be constructed |
---|
203 | into the stack) |
---|
204 | - if the padding and mode of the type is such that a copy into a register |
---|
205 | would put it into the wrong part of the register. |
---|
206 | |
---|
207 | Which padding can't be supported depends on the byte endianness. |
---|
208 | |
---|
209 | A value in a register is implicitly padded at the most significant end. |
---|
210 | On a big-endian machine, that is the lower end in memory. |
---|
211 | So a value padded in memory at the upper end can't go in a register. |
---|
212 | For a little-endian machine, the reverse is true. */ |
---|
213 | |
---|
214 | #define MUST_PASS_IN_STACK(MODE,TYPE) \ |
---|
215 | ((TYPE) != 0 \ |
---|
216 | && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \ |
---|
217 | || TREE_ADDRESSABLE (TYPE) \ |
---|
218 | || ((MODE) == BLKmode \ |
---|
219 | && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ |
---|
220 | && 0 == (int_size_in_bytes (TYPE) \ |
---|
221 | % (PARM_BOUNDARY / BITS_PER_UNIT))) \ |
---|
222 | && (FUNCTION_ARG_PADDING (MODE, TYPE) \ |
---|
223 | == (BYTES_BIG_ENDIAN ? upward : downward))))) |
---|
224 | |
---|
225 | /* Nonzero if type TYPE should be returned in memory. |
---|
226 | Most machines can use the following default definition. */ |
---|
227 | |
---|
228 | #ifndef RETURN_IN_MEMORY |
---|
229 | #define RETURN_IN_MEMORY(TYPE) (TYPE_MODE (TYPE) == BLKmode) |
---|
230 | #endif |
---|
231 | |
---|
232 | /* Optabs are tables saying how to generate insn bodies |
---|
233 | for various machine modes and numbers of operands. |
---|
234 | Each optab applies to one operation. |
---|
235 | For example, add_optab applies to addition. |
---|
236 | |
---|
237 | The insn_code slot is the enum insn_code that says how to |
---|
238 | generate an insn for this operation on a particular machine mode. |
---|
239 | It is CODE_FOR_nothing if there is no such insn on the target machine. |
---|
240 | |
---|
241 | The `lib_call' slot is the name of the library function that |
---|
242 | can be used to perform the operation. |
---|
243 | |
---|
244 | A few optabs, such as move_optab and cmp_optab, are used |
---|
245 | by special code. */ |
---|
246 | |
---|
247 | /* Everything that uses expr.h needs to define enum insn_code |
---|
248 | but we don't list it in the Makefile dependencies just for that. */ |
---|
249 | #include "insn-codes.h" |
---|
250 | |
---|
251 | typedef struct optab |
---|
252 | { |
---|
253 | enum rtx_code code; |
---|
254 | struct { |
---|
255 | enum insn_code insn_code; |
---|
256 | rtx libfunc; |
---|
257 | } handlers [NUM_MACHINE_MODES]; |
---|
258 | } * optab; |
---|
259 | |
---|
260 | /* Given an enum insn_code, access the function to construct |
---|
261 | the body of that kind of insn. */ |
---|
262 | #ifdef FUNCTION_CONVERSION_BUG |
---|
263 | /* Some compilers fail to convert a function properly to a |
---|
264 | pointer-to-function when used as an argument. |
---|
265 | So produce the pointer-to-function directly. |
---|
266 | Luckily, these compilers seem to work properly when you |
---|
267 | call the pointer-to-function. */ |
---|
268 | #define GEN_FCN(CODE) (insn_gen_function[(int) (CODE)]) |
---|
269 | #else |
---|
270 | #define GEN_FCN(CODE) (*insn_gen_function[(int) (CODE)]) |
---|
271 | #endif |
---|
272 | |
---|
273 | extern rtx (*const insn_gen_function[]) (); |
---|
274 | |
---|
275 | extern optab add_optab; |
---|
276 | extern optab sub_optab; |
---|
277 | extern optab smul_optab; /* Signed and floating-point multiply */ |
---|
278 | extern optab smul_highpart_optab; /* Signed multiply, return high word */ |
---|
279 | extern optab umul_highpart_optab; |
---|
280 | extern optab smul_widen_optab; /* Signed multiply with result |
---|
281 | one machine mode wider than args */ |
---|
282 | extern optab umul_widen_optab; |
---|
283 | extern optab sdiv_optab; /* Signed divide */ |
---|
284 | extern optab sdivmod_optab; /* Signed divide-and-remainder in one */ |
---|
285 | extern optab udiv_optab; |
---|
286 | extern optab udivmod_optab; |
---|
287 | extern optab smod_optab; /* Signed remainder */ |
---|
288 | extern optab umod_optab; |
---|
289 | extern optab flodiv_optab; /* Optab for floating divide. */ |
---|
290 | extern optab ftrunc_optab; /* Convert float to integer in float fmt */ |
---|
291 | extern optab and_optab; /* Logical and */ |
---|
292 | extern optab ior_optab; /* Logical or */ |
---|
293 | extern optab xor_optab; /* Logical xor */ |
---|
294 | extern optab ashl_optab; /* Arithmetic shift left */ |
---|
295 | extern optab ashr_optab; /* Arithmetic shift right */ |
---|
296 | extern optab lshr_optab; /* Logical shift right */ |
---|
297 | extern optab rotl_optab; /* Rotate left */ |
---|
298 | extern optab rotr_optab; /* Rotate right */ |
---|
299 | extern optab smin_optab; /* Signed and floating-point minimum value */ |
---|
300 | extern optab smax_optab; /* Signed and floating-point maximum value */ |
---|
301 | extern optab umin_optab; /* Unsigned minimum value */ |
---|
302 | extern optab umax_optab; /* Unsigned maximum value */ |
---|
303 | |
---|
304 | extern optab mov_optab; /* Move instruction. */ |
---|
305 | extern optab movstrict_optab; /* Move, preserving high part of register. */ |
---|
306 | |
---|
307 | extern optab cmp_optab; /* Compare insn; two operands. */ |
---|
308 | extern optab tst_optab; /* tst insn; compare one operand against 0 */ |
---|
309 | |
---|
310 | /* Unary operations */ |
---|
311 | extern optab neg_optab; /* Negation */ |
---|
312 | extern optab abs_optab; /* Abs value */ |
---|
313 | extern optab one_cmpl_optab; /* Bitwise not */ |
---|
314 | extern optab ffs_optab; /* Find first bit set */ |
---|
315 | extern optab sqrt_optab; /* Square root */ |
---|
316 | extern optab sin_optab; /* Sine */ |
---|
317 | extern optab cos_optab; /* Cosine */ |
---|
318 | extern optab strlen_optab; /* String length */ |
---|
319 | |
---|
320 | /* Tables of patterns for extending one integer mode to another. */ |
---|
321 | extern enum insn_code extendtab[MAX_MACHINE_MODE][MAX_MACHINE_MODE][2]; |
---|
322 | |
---|
323 | /* Tables of patterns for converting between fixed and floating point. */ |
---|
324 | extern enum insn_code fixtab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2]; |
---|
325 | extern enum insn_code fixtrunctab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2]; |
---|
326 | extern enum insn_code floattab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2]; |
---|
327 | |
---|
328 | /* Contains the optab used for each rtx code. */ |
---|
329 | extern optab code_to_optab[NUM_RTX_CODE + 1]; |
---|
330 | |
---|
331 | /* Passed to expand_binop and expand_unop to say which options to try to use |
---|
332 | if the requested operation can't be open-coded on the requisite mode. |
---|
333 | Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using a library call. |
---|
334 | Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try using a wider mode. |
---|
335 | OPTAB_MUST_WIDEN says try widening and don't try anything else. */ |
---|
336 | |
---|
337 | enum optab_methods |
---|
338 | { |
---|
339 | OPTAB_DIRECT, |
---|
340 | OPTAB_LIB, |
---|
341 | OPTAB_WIDEN, |
---|
342 | OPTAB_LIB_WIDEN, |
---|
343 | OPTAB_MUST_WIDEN |
---|
344 | }; |
---|
345 | |
---|
346 | /* SYMBOL_REF rtx's for the library functions that are called |
---|
347 | implicitly and not via optabs. */ |
---|
348 | |
---|
349 | extern rtx extendsfdf2_libfunc; |
---|
350 | extern rtx extendsfxf2_libfunc; |
---|
351 | extern rtx extendsftf2_libfunc; |
---|
352 | extern rtx extenddfxf2_libfunc; |
---|
353 | extern rtx extenddftf2_libfunc; |
---|
354 | |
---|
355 | extern rtx truncdfsf2_libfunc; |
---|
356 | extern rtx truncxfsf2_libfunc; |
---|
357 | extern rtx trunctfsf2_libfunc; |
---|
358 | extern rtx truncxfdf2_libfunc; |
---|
359 | extern rtx trunctfdf2_libfunc; |
---|
360 | |
---|
361 | extern rtx memcpy_libfunc; |
---|
362 | extern rtx bcopy_libfunc; |
---|
363 | extern rtx memcmp_libfunc; |
---|
364 | extern rtx bcmp_libfunc; |
---|
365 | extern rtx memset_libfunc; |
---|
366 | extern rtx bzero_libfunc; |
---|
367 | |
---|
368 | extern rtx eqhf2_libfunc; |
---|
369 | extern rtx nehf2_libfunc; |
---|
370 | extern rtx gthf2_libfunc; |
---|
371 | extern rtx gehf2_libfunc; |
---|
372 | extern rtx lthf2_libfunc; |
---|
373 | extern rtx lehf2_libfunc; |
---|
374 | |
---|
375 | extern rtx eqsf2_libfunc; |
---|
376 | extern rtx nesf2_libfunc; |
---|
377 | extern rtx gtsf2_libfunc; |
---|
378 | extern rtx gesf2_libfunc; |
---|
379 | extern rtx ltsf2_libfunc; |
---|
380 | extern rtx lesf2_libfunc; |
---|
381 | |
---|
382 | extern rtx eqdf2_libfunc; |
---|
383 | extern rtx nedf2_libfunc; |
---|
384 | extern rtx gtdf2_libfunc; |
---|
385 | extern rtx gedf2_libfunc; |
---|
386 | extern rtx ltdf2_libfunc; |
---|
387 | extern rtx ledf2_libfunc; |
---|
388 | |
---|
389 | extern rtx eqxf2_libfunc; |
---|
390 | extern rtx nexf2_libfunc; |
---|
391 | extern rtx gtxf2_libfunc; |
---|
392 | extern rtx gexf2_libfunc; |
---|
393 | extern rtx ltxf2_libfunc; |
---|
394 | extern rtx lexf2_libfunc; |
---|
395 | |
---|
396 | extern rtx eqtf2_libfunc; |
---|
397 | extern rtx netf2_libfunc; |
---|
398 | extern rtx gttf2_libfunc; |
---|
399 | extern rtx getf2_libfunc; |
---|
400 | extern rtx lttf2_libfunc; |
---|
401 | extern rtx letf2_libfunc; |
---|
402 | |
---|
403 | extern rtx floatsisf_libfunc; |
---|
404 | extern rtx floatdisf_libfunc; |
---|
405 | extern rtx floattisf_libfunc; |
---|
406 | |
---|
407 | extern rtx floatsidf_libfunc; |
---|
408 | extern rtx floatdidf_libfunc; |
---|
409 | extern rtx floattidf_libfunc; |
---|
410 | |
---|
411 | extern rtx floatsixf_libfunc; |
---|
412 | extern rtx floatdixf_libfunc; |
---|
413 | extern rtx floattixf_libfunc; |
---|
414 | |
---|
415 | extern rtx floatsitf_libfunc; |
---|
416 | extern rtx floatditf_libfunc; |
---|
417 | extern rtx floattitf_libfunc; |
---|
418 | |
---|
419 | extern rtx fixsfsi_libfunc; |
---|
420 | extern rtx fixsfdi_libfunc; |
---|
421 | extern rtx fixsfti_libfunc; |
---|
422 | |
---|
423 | extern rtx fixdfsi_libfunc; |
---|
424 | extern rtx fixdfdi_libfunc; |
---|
425 | extern rtx fixdfti_libfunc; |
---|
426 | |
---|
427 | extern rtx fixxfsi_libfunc; |
---|
428 | extern rtx fixxfdi_libfunc; |
---|
429 | extern rtx fixxfti_libfunc; |
---|
430 | |
---|
431 | extern rtx fixtfsi_libfunc; |
---|
432 | extern rtx fixtfdi_libfunc; |
---|
433 | extern rtx fixtfti_libfunc; |
---|
434 | |
---|
435 | extern rtx fixunssfsi_libfunc; |
---|
436 | extern rtx fixunssfdi_libfunc; |
---|
437 | extern rtx fixunssfti_libfunc; |
---|
438 | |
---|
439 | extern rtx fixunsdfsi_libfunc; |
---|
440 | extern rtx fixunsdfdi_libfunc; |
---|
441 | extern rtx fixunsdfti_libfunc; |
---|
442 | |
---|
443 | extern rtx fixunsxfsi_libfunc; |
---|
444 | extern rtx fixunsxfdi_libfunc; |
---|
445 | extern rtx fixunsxfti_libfunc; |
---|
446 | |
---|
447 | extern rtx fixunstfsi_libfunc; |
---|
448 | extern rtx fixunstfdi_libfunc; |
---|
449 | extern rtx fixunstfti_libfunc; |
---|
450 | |
---|
451 | typedef rtx (*rtxfun) (); |
---|
452 | |
---|
453 | /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...) |
---|
454 | gives the gen_function to make a branch to test that condition. */ |
---|
455 | |
---|
456 | extern rtxfun bcc_gen_fctn[NUM_RTX_CODE]; |
---|
457 | |
---|
458 | /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...) |
---|
459 | gives the insn code to make a store-condition insn |
---|
460 | to test that condition. */ |
---|
461 | |
---|
462 | extern enum insn_code setcc_gen_code[NUM_RTX_CODE]; |
---|
463 | |
---|
464 | #ifdef HAVE_conditional_move |
---|
465 | /* Indexed by the the machine mode, gives the insn code to make a conditional |
---|
466 | move insn. */ |
---|
467 | |
---|
468 | extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES]; |
---|
469 | #endif |
---|
470 | |
---|
471 | /* This array records the insn_code of insns to perform block moves. */ |
---|
472 | extern enum insn_code movstr_optab[NUM_MACHINE_MODES]; |
---|
473 | |
---|
474 | /* Define functions given in optabs.c. */ |
---|
475 | |
---|
476 | /* Expand a binary operation given optab and rtx operands. */ |
---|
477 | extern rtx expand_binop PROTO((enum machine_mode, optab, rtx, rtx, rtx, |
---|
478 | int, enum optab_methods)); |
---|
479 | |
---|
480 | /* Expand a binary operation with both signed and unsigned forms. */ |
---|
481 | extern rtx sign_expand_binop PROTO((enum machine_mode, optab, optab, rtx, |
---|
482 | rtx, rtx, int, enum optab_methods)); |
---|
483 | |
---|
484 | /* Generate code to perform an operation on two operands with two results. */ |
---|
485 | extern int expand_twoval_binop PROTO((optab, rtx, rtx, rtx, rtx, int)); |
---|
486 | |
---|
487 | /* Expand a unary arithmetic operation given optab rtx operand. */ |
---|
488 | extern rtx expand_unop PROTO((enum machine_mode, optab, rtx, rtx, int)); |
---|
489 | |
---|
490 | /* Expand the absolute value operation. */ |
---|
491 | extern rtx expand_abs PROTO((enum machine_mode, rtx, rtx, int, int)); |
---|
492 | |
---|
493 | /* Expand the complex absolute value operation. */ |
---|
494 | extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int)); |
---|
495 | |
---|
496 | /* Generate an instruction with a given INSN_CODE with an output and |
---|
497 | an input. */ |
---|
498 | extern void emit_unop_insn PROTO((int, rtx, rtx, enum rtx_code)); |
---|
499 | |
---|
500 | /* Emit code to perform a series of operations on a multi-word quantity, one |
---|
501 | word at a time. */ |
---|
502 | extern rtx emit_no_conflict_block PROTO((rtx, rtx, rtx, rtx, rtx)); |
---|
503 | |
---|
504 | /* Emit code to make a call to a constant function or a library call. */ |
---|
505 | extern void emit_libcall_block PROTO((rtx, rtx, rtx, rtx)); |
---|
506 | |
---|
507 | /* Emit one rtl instruction to store zero in specified rtx. */ |
---|
508 | extern void emit_clr_insn PROTO((rtx)); |
---|
509 | |
---|
510 | /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0. */ |
---|
511 | extern void emit_0_to_1_insn PROTO((rtx)); |
---|
512 | |
---|
513 | /* Emit one rtl insn to compare two rtx's. */ |
---|
514 | extern void emit_cmp_insn PROTO((rtx, rtx, enum rtx_code, rtx, |
---|
515 | enum machine_mode, int, int)); |
---|
516 | |
---|
517 | /* Nonzero if a compare of mode MODE can be done straightforwardly |
---|
518 | (without splitting it into pieces). */ |
---|
519 | extern int can_compare_p PROTO((enum machine_mode)); |
---|
520 | |
---|
521 | /* Emit a library call comparison between floating point X and Y. |
---|
522 | COMPARISON is the rtl operator to compare with (EQ, NE, GT, etc.). */ |
---|
523 | extern void emit_float_lib_cmp PROTO((rtx, rtx, enum rtx_code)); |
---|
524 | |
---|
525 | /* Generate code to indirectly jump to a location given in the rtx LOC. */ |
---|
526 | extern void emit_indirect_jump PROTO((rtx)); |
---|
527 | |
---|
528 | #ifdef HAVE_conditional_move |
---|
529 | /* Emit a conditional move operation. */ |
---|
530 | rtx emit_conditional_move PROTO((rtx, enum rtx_code, rtx, rtx, |
---|
531 | enum machine_mode, rtx, rtx, |
---|
532 | enum machine_mode, int)); |
---|
533 | |
---|
534 | /* Return non-zero if the conditional move is supported. */ |
---|
535 | int can_conditionally_move_p PROTO((enum machine_mode mode)); |
---|
536 | #endif |
---|
537 | |
---|
538 | /* Create but don't emit one rtl instruction to add one rtx into another. |
---|
539 | Modes must match; operands must meet the operation's predicates. |
---|
540 | Likewise for subtraction and for just copying. |
---|
541 | These do not call protect_from_queue; caller must do so. */ |
---|
542 | extern rtx gen_add2_insn PROTO((rtx, rtx)); |
---|
543 | extern rtx gen_sub2_insn PROTO((rtx, rtx)); |
---|
544 | extern rtx gen_move_insn PROTO((rtx, rtx)); |
---|
545 | extern int have_add2_insn PROTO((enum machine_mode)); |
---|
546 | extern int have_sub2_insn PROTO((enum machine_mode)); |
---|
547 | |
---|
548 | /* Return the INSN_CODE to use for an extend operation. */ |
---|
549 | extern enum insn_code can_extend_p PROTO((enum machine_mode, |
---|
550 | enum machine_mode, int)); |
---|
551 | |
---|
552 | /* Generate the body of an insn to extend Y (with mode MFROM) |
---|
553 | into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */ |
---|
554 | extern rtx gen_extend_insn PROTO((rtx, rtx, enum machine_mode, |
---|
555 | enum machine_mode, int)); |
---|
556 | |
---|
557 | /* Initialize the tables that control conversion between fixed and |
---|
558 | floating values. */ |
---|
559 | extern void init_fixtab PROTO((void)); |
---|
560 | extern void init_floattab PROTO((void)); |
---|
561 | |
---|
562 | /* Generate code for a FLOAT_EXPR. */ |
---|
563 | extern void expand_float PROTO((rtx, rtx, int)); |
---|
564 | |
---|
565 | /* Generate code for a FIX_EXPR. */ |
---|
566 | extern void expand_fix PROTO((rtx, rtx, int)); |
---|
567 | |
---|
568 | /* Call this once to initialize the contents of the optabs |
---|
569 | appropriately for the current target machine. */ |
---|
570 | extern void init_optabs PROTO((void)); |
---|
571 | |
---|
572 | /* Functions from expmed.c: */ |
---|
573 | |
---|
574 | /* Arguments MODE, RTX: return an rtx for the negation of that value. |
---|
575 | May emit insns. */ |
---|
576 | extern rtx negate_rtx PROTO((enum machine_mode, rtx)); |
---|
577 | |
---|
578 | /* Expand a logical AND operation. */ |
---|
579 | extern rtx expand_and PROTO((rtx, rtx, rtx)); |
---|
580 | |
---|
581 | /* Emit a store-flag operation. */ |
---|
582 | extern rtx emit_store_flag PROTO((rtx, enum rtx_code, rtx, rtx, |
---|
583 | enum machine_mode, int, int)); |
---|
584 | |
---|
585 | /* Functions from loop.c: */ |
---|
586 | |
---|
587 | /* Given a JUMP_INSN, return a description of the test being made. */ |
---|
588 | extern rtx get_condition PROTO((rtx, rtx *)); |
---|
589 | |
---|
590 | /* Functions from expr.c: */ |
---|
591 | |
---|
592 | /* This is run once per compilation to set up which modes can be used |
---|
593 | directly in memory and to initialize the block move optab. */ |
---|
594 | extern void init_expr_once PROTO((void)); |
---|
595 | |
---|
596 | /* This is run at the start of compiling a function. */ |
---|
597 | extern void init_expr PROTO((void)); |
---|
598 | |
---|
599 | /* Use protect_from_queue to convert a QUEUED expression |
---|
600 | into something that you can put immediately into an instruction. */ |
---|
601 | extern rtx protect_from_queue PROTO((rtx, int)); |
---|
602 | |
---|
603 | /* Perform all the pending incrementations. */ |
---|
604 | extern void emit_queue PROTO((void)); |
---|
605 | |
---|
606 | /* Emit some rtl insns to move data between rtx's, converting machine modes. |
---|
607 | Both modes must be floating or both fixed. */ |
---|
608 | extern void convert_move PROTO((rtx, rtx, int)); |
---|
609 | |
---|
610 | /* Convert an rtx to specified machine mode and return the result. */ |
---|
611 | extern rtx convert_to_mode PROTO((enum machine_mode, rtx, int)); |
---|
612 | |
---|
613 | /* Convert an rtx to MODE from OLDMODE and return the result. */ |
---|
614 | extern rtx convert_modes PROTO((enum machine_mode, enum machine_mode, rtx, int)); |
---|
615 | |
---|
616 | /* Emit code to move a block Y to a block X. */ |
---|
617 | extern void emit_block_move PROTO((rtx, rtx, rtx, int)); |
---|
618 | |
---|
619 | /* Copy all or part of a value X into registers starting at REGNO. |
---|
620 | The number of registers to be filled is NREGS. */ |
---|
621 | extern void move_block_to_reg PROTO((int, rtx, int, enum machine_mode)); |
---|
622 | |
---|
623 | /* Copy all or part of a BLKmode value X out of registers starting at REGNO. |
---|
624 | The number of registers to be filled is NREGS. */ |
---|
625 | extern void move_block_from_reg PROTO((int, rtx, int, int)); |
---|
626 | |
---|
627 | /* Mark REG as holding a parameter for the next CALL_INSN. */ |
---|
628 | extern void use_reg PROTO((rtx*, rtx)); |
---|
629 | /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters |
---|
630 | for the next CALL_INSN. */ |
---|
631 | extern void use_regs PROTO((rtx*, int, int)); |
---|
632 | |
---|
633 | /* Write zeros through the storage of OBJECT. |
---|
634 | If OBJECT has BLKmode, SIZE is its length in bytes. */ |
---|
635 | extern void clear_storage PROTO((rtx, rtx)); |
---|
636 | |
---|
637 | /* Emit insns to set X from Y. */ |
---|
638 | extern rtx emit_move_insn PROTO((rtx, rtx)); |
---|
639 | |
---|
640 | /* Emit insns to set X from Y, with no frills. */ |
---|
641 | extern rtx emit_move_insn_1 PROTO ((rtx, rtx)); |
---|
642 | |
---|
643 | /* Push a block of length SIZE (perhaps variable) |
---|
644 | and return an rtx to address the beginning of the block. */ |
---|
645 | extern rtx push_block PROTO((rtx, int, int)); |
---|
646 | |
---|
647 | /* Make an operand to push something on the stack. */ |
---|
648 | extern rtx gen_push_operand PROTO((void)); |
---|
649 | |
---|
650 | #ifdef TREE_CODE |
---|
651 | /* Generate code to push something onto the stack, given its mode and type. */ |
---|
652 | extern void emit_push_insn PROTO((rtx, enum machine_mode, tree, rtx, int, |
---|
653 | int, rtx, int, rtx, rtx)); |
---|
654 | |
---|
655 | /* Emit library call. */ |
---|
656 | extern void emit_library_call PVPROTO((rtx orgfun, int no_queue, |
---|
657 | enum machine_mode outmode, int nargs, ...)); |
---|
658 | extern rtx emit_library_call_value PVPROTO((rtx orgfun, rtx value, int no_queue, |
---|
659 | enum machine_mode outmode, int nargs, ...)); |
---|
660 | |
---|
661 | /* Expand an assignment that stores the value of FROM into TO. */ |
---|
662 | extern rtx expand_assignment PROTO((tree, tree, int, int)); |
---|
663 | |
---|
664 | /* Generate code for computing expression EXP, |
---|
665 | and storing the value into TARGET. |
---|
666 | If SUGGEST_REG is nonzero, copy the value through a register |
---|
667 | and return that register, if that is possible. */ |
---|
668 | extern rtx store_expr PROTO((tree, rtx, int)); |
---|
669 | #endif |
---|
670 | |
---|
671 | /* Given an rtx that may include add and multiply operations, |
---|
672 | generate them as insns and return a pseudo-reg containing the value. |
---|
673 | Useful after calling expand_expr with 1 as sum_ok. */ |
---|
674 | extern rtx force_operand PROTO((rtx, rtx)); |
---|
675 | |
---|
676 | #ifdef TREE_CODE |
---|
677 | /* Generate code for computing expression EXP. |
---|
678 | An rtx for the computed value is returned. The value is never null. |
---|
679 | In the case of a void EXP, const0_rtx is returned. */ |
---|
680 | extern rtx expand_expr PROTO((tree, rtx, enum machine_mode, |
---|
681 | enum expand_modifier)); |
---|
682 | #endif |
---|
683 | |
---|
684 | /* At the start of a function, record that we have no previously-pushed |
---|
685 | arguments waiting to be popped. */ |
---|
686 | extern void init_pending_stack_adjust PROTO((void)); |
---|
687 | |
---|
688 | /* When exiting from function, if safe, clear out any pending stack adjust |
---|
689 | so the adjustment won't get done. */ |
---|
690 | extern void clear_pending_stack_adjust PROTO((void)); |
---|
691 | |
---|
692 | /* Pop any previously-pushed arguments that have not been popped yet. */ |
---|
693 | extern void do_pending_stack_adjust PROTO((void)); |
---|
694 | |
---|
695 | #ifdef TREE_CODE |
---|
696 | /* Expand all cleanups up to OLD_CLEANUPS. */ |
---|
697 | extern void expand_cleanups_to PROTO((tree)); |
---|
698 | |
---|
699 | /* Generate code to evaluate EXP and jump to LABEL if the value is zero. */ |
---|
700 | extern void jumpifnot PROTO((tree, rtx)); |
---|
701 | |
---|
702 | /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */ |
---|
703 | extern void jumpif PROTO((tree, rtx)); |
---|
704 | |
---|
705 | /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if |
---|
706 | the result is zero, or IF_TRUE_LABEL if the result is one. */ |
---|
707 | extern void do_jump PROTO((tree, rtx, rtx)); |
---|
708 | #endif |
---|
709 | |
---|
710 | /* Generate rtl to compare two rtx's, will call emit_cmp_insn. */ |
---|
711 | extern rtx compare_from_rtx PROTO((rtx, rtx, enum rtx_code, int, |
---|
712 | enum machine_mode, rtx, int)); |
---|
713 | |
---|
714 | /* Generate a tablejump instruction (used for switch statements). */ |
---|
715 | extern void do_tablejump PROTO((rtx, enum machine_mode, rtx, rtx, rtx)); |
---|
716 | |
---|
717 | #ifdef TREE_CODE |
---|
718 | /* rtl.h and tree.h were included. */ |
---|
719 | /* Return an rtx for the size in bytes of the value of an expr. */ |
---|
720 | extern rtx expr_size PROTO((tree)); |
---|
721 | |
---|
722 | extern rtx lookup_static_chain PROTO((tree)); |
---|
723 | |
---|
724 | /* Convert a stack slot address ADDR valid in function FNDECL |
---|
725 | into an address valid in this function (using a static chain). */ |
---|
726 | extern rtx fix_lexical_addr PROTO((rtx, tree)); |
---|
727 | |
---|
728 | /* Return the address of the trampoline for entering nested fn FUNCTION. */ |
---|
729 | extern rtx trampoline_address PROTO((tree)); |
---|
730 | |
---|
731 | /* Return an rtx that refers to the value returned by a function |
---|
732 | in its original home. This becomes invalid if any more code is emitted. */ |
---|
733 | extern rtx hard_function_value PROTO((tree, tree)); |
---|
734 | |
---|
735 | extern rtx prepare_call_address PROTO((rtx, tree, rtx *, int)); |
---|
736 | |
---|
737 | extern rtx expand_call PROTO((tree, rtx, int)); |
---|
738 | |
---|
739 | extern rtx expand_shift PROTO((enum tree_code, enum machine_mode, rtx, tree, rtx, int)); |
---|
740 | extern rtx expand_divmod PROTO((int, enum tree_code, enum machine_mode, rtx, rtx, rtx, int)); |
---|
741 | extern void locate_and_pad_parm PROTO((enum machine_mode, tree, int, tree, struct args_size *, struct args_size *, struct args_size *)); |
---|
742 | extern rtx expand_inline_function PROTO((tree, tree, rtx, int, tree, rtx)); |
---|
743 | /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary. */ |
---|
744 | extern rtx label_rtx PROTO((tree)); |
---|
745 | #endif |
---|
746 | |
---|
747 | /* Indicate how an input argument register was promoted. */ |
---|
748 | extern rtx promoted_input_arg PROTO((int, enum machine_mode *, int *)); |
---|
749 | |
---|
750 | /* Return an rtx like arg but sans any constant terms. |
---|
751 | Returns the original rtx if it has no constant terms. |
---|
752 | The constant terms are added and stored via a second arg. */ |
---|
753 | extern rtx eliminate_constant_term PROTO((rtx, rtx *)); |
---|
754 | |
---|
755 | /* Convert arg to a valid memory address for specified machine mode, |
---|
756 | by emitting insns to perform arithmetic if nec. */ |
---|
757 | extern rtx memory_address PROTO((enum machine_mode, rtx)); |
---|
758 | |
---|
759 | /* Like `memory_address' but pretent `flag_force_addr' is 0. */ |
---|
760 | extern rtx memory_address_noforce PROTO((enum machine_mode, rtx)); |
---|
761 | |
---|
762 | /* Return a memory reference like MEMREF, but with its mode changed |
---|
763 | to MODE and its address changed to ADDR. |
---|
764 | (VOIDmode means don't change the mode. |
---|
765 | NULL for ADDR means don't change the address.) */ |
---|
766 | extern rtx change_address PROTO((rtx, enum machine_mode, rtx)); |
---|
767 | |
---|
768 | /* Return a memory reference like MEMREF, but which is known to have a |
---|
769 | valid address. */ |
---|
770 | |
---|
771 | extern rtx validize_mem PROTO((rtx)); |
---|
772 | |
---|
773 | /* Assemble the static constant template for function entry trampolines. */ |
---|
774 | extern rtx assemble_trampoline_template PROTO((void)); |
---|
775 | |
---|
776 | /* Return 1 if two rtx's are equivalent in structure and elements. */ |
---|
777 | extern int rtx_equal_p PROTO((rtx, rtx)); |
---|
778 | |
---|
779 | /* Given rtx, return new rtx whose address won't be affected by |
---|
780 | any side effects. It has been copied to a new temporary reg. */ |
---|
781 | extern rtx stabilize PROTO((rtx)); |
---|
782 | |
---|
783 | /* Given an rtx, copy all regs it refers to into new temps |
---|
784 | and return a modified copy that refers to the new temps. */ |
---|
785 | extern rtx copy_all_regs PROTO((rtx)); |
---|
786 | |
---|
787 | /* Copy given rtx to a new temp reg and return that. */ |
---|
788 | extern rtx copy_to_reg PROTO((rtx)); |
---|
789 | |
---|
790 | /* Like copy_to_reg but always make the reg Pmode. */ |
---|
791 | extern rtx copy_addr_to_reg PROTO((rtx)); |
---|
792 | |
---|
793 | /* Like copy_to_reg but always make the reg the specified mode MODE. */ |
---|
794 | extern rtx copy_to_mode_reg PROTO((enum machine_mode, rtx)); |
---|
795 | |
---|
796 | /* Copy given rtx to given temp reg and return that. */ |
---|
797 | extern rtx copy_to_suggested_reg PROTO((rtx, rtx, enum machine_mode)); |
---|
798 | |
---|
799 | /* Copy a value to a register if it isn't already a register. |
---|
800 | Args are mode (in case value is a constant) and the value. */ |
---|
801 | extern rtx force_reg PROTO((enum machine_mode, rtx)); |
---|
802 | |
---|
803 | /* Return given rtx, copied into a new temp reg if it was in memory. */ |
---|
804 | extern rtx force_not_mem PROTO((rtx)); |
---|
805 | |
---|
806 | #ifdef TREE_CODE |
---|
807 | /* Return mode and signedness to use when object is promoted. */ |
---|
808 | extern enum machine_mode promote_mode PROTO((tree, enum machine_mode, |
---|
809 | int *, int)); |
---|
810 | #endif |
---|
811 | |
---|
812 | /* Remove some bytes from the stack. An rtx says how many. */ |
---|
813 | extern void adjust_stack PROTO((rtx)); |
---|
814 | |
---|
815 | /* Add some bytes to the stack. An rtx says how many. */ |
---|
816 | extern void anti_adjust_stack PROTO((rtx)); |
---|
817 | |
---|
818 | /* This enum is used for the following two functions. */ |
---|
819 | enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL}; |
---|
820 | |
---|
821 | /* Save the stack pointer at the specified level. */ |
---|
822 | extern void emit_stack_save PROTO((enum save_level, rtx *, rtx)); |
---|
823 | |
---|
824 | /* Restore the stack pointer from a save area of the specified level. */ |
---|
825 | extern void emit_stack_restore PROTO((enum save_level, rtx, rtx)); |
---|
826 | |
---|
827 | /* Allocate some space on the stack dynamically and return its address. An rtx |
---|
828 | says how many bytes. */ |
---|
829 | extern rtx allocate_dynamic_stack_space PROTO((rtx, rtx, int)); |
---|
830 | |
---|
831 | /* Emit code to copy function value to a new temp reg and return that reg. */ |
---|
832 | extern rtx function_value (); |
---|
833 | |
---|
834 | /* Return an rtx that refers to the value returned by a library call |
---|
835 | in its original home. This becomes invalid if any more code is emitted. */ |
---|
836 | extern rtx hard_libcall_value PROTO((enum machine_mode)); |
---|
837 | |
---|
838 | /* Given an rtx, return an rtx for a value rounded up to a multiple |
---|
839 | of STACK_BOUNDARY / BITS_PER_UNIT. */ |
---|
840 | extern rtx round_push PROTO((rtx)); |
---|
841 | |
---|
842 | extern void emit_block_move PROTO((rtx, rtx, rtx, int)); |
---|
843 | |
---|
844 | extern rtx store_bit_field PROTO((rtx, int, int, enum machine_mode, rtx, int, int)); |
---|
845 | extern rtx extract_bit_field PROTO((rtx, int, int, int, rtx, enum machine_mode, enum machine_mode, int, int)); |
---|
846 | extern rtx expand_mult PROTO((enum machine_mode, rtx, rtx, rtx, int)); |
---|
847 | extern rtx expand_mult_add PROTO((rtx, rtx, rtx, rtx,enum machine_mode, int)); |
---|
848 | |
---|
849 | extern rtx assemble_static_space PROTO((int)); |
---|
850 | |
---|
851 | /* Hook called by expand_expr for language-specific tree codes. |
---|
852 | It is up to the language front end to install a hook |
---|
853 | if it has any such codes that expand_expr needs to know about. */ |
---|
854 | extern rtx (*lang_expand_expr) (); |
---|