Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-complex.c @ 63:b7f97abdc517 gcc-4.6-20100522
update gcc from gcc-4.5.0 to gcc-4.6
author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
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date | Mon, 24 May 2010 12:47:05 +0900 |
parents | 77e2b8dfacca |
children | f6334be47118 |
rev | line source |
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0 | 1 /* Lower complex number operations to scalar operations. |
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2 Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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3 Free Software Foundation, Inc. |
0 | 4 |
5 This file is part of GCC. | |
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6 |
0 | 7 GCC is free software; you can redistribute it and/or modify it |
8 under the terms of the GNU General Public License as published by the | |
9 Free Software Foundation; either version 3, or (at your option) any | |
10 later version. | |
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11 |
0 | 12 GCC is distributed in the hope that it will be useful, but WITHOUT |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
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16 |
0 | 17 You should have received a copy of the GNU General Public License |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 #include "config.h" | |
22 #include "system.h" | |
23 #include "coretypes.h" | |
24 #include "tm.h" | |
25 #include "tree.h" | |
26 #include "flags.h" | |
27 #include "tree-flow.h" | |
28 #include "gimple.h" | |
29 #include "tree-iterator.h" | |
30 #include "tree-pass.h" | |
31 #include "tree-ssa-propagate.h" | |
32 #include "diagnostic.h" | |
33 | |
34 | |
35 /* For each complex ssa name, a lattice value. We're interested in finding | |
36 out whether a complex number is degenerate in some way, having only real | |
37 or only complex parts. */ | |
38 | |
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39 enum |
0 | 40 { |
41 UNINITIALIZED = 0, | |
42 ONLY_REAL = 1, | |
43 ONLY_IMAG = 2, | |
44 VARYING = 3 | |
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45 }; |
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46 |
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47 /* The type complex_lattice_t holds combinations of the above |
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48 constants. */ |
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49 typedef int complex_lattice_t; |
0 | 50 |
51 #define PAIR(a, b) ((a) << 2 | (b)) | |
52 | |
53 DEF_VEC_I(complex_lattice_t); | |
54 DEF_VEC_ALLOC_I(complex_lattice_t, heap); | |
55 | |
56 static VEC(complex_lattice_t, heap) *complex_lattice_values; | |
57 | |
58 /* For each complex variable, a pair of variables for the components exists in | |
59 the hashtable. */ | |
60 static htab_t complex_variable_components; | |
61 | |
62 /* For each complex SSA_NAME, a pair of ssa names for the components. */ | |
63 static VEC(tree, heap) *complex_ssa_name_components; | |
64 | |
65 /* Lookup UID in the complex_variable_components hashtable and return the | |
66 associated tree. */ | |
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67 static tree |
0 | 68 cvc_lookup (unsigned int uid) |
69 { | |
70 struct int_tree_map *h, in; | |
71 in.uid = uid; | |
72 h = (struct int_tree_map *) htab_find_with_hash (complex_variable_components, &in, uid); | |
73 return h ? h->to : NULL; | |
74 } | |
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75 |
0 | 76 /* Insert the pair UID, TO into the complex_variable_components hashtable. */ |
77 | |
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78 static void |
0 | 79 cvc_insert (unsigned int uid, tree to) |
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80 { |
0 | 81 struct int_tree_map *h; |
82 void **loc; | |
83 | |
84 h = XNEW (struct int_tree_map); | |
85 h->uid = uid; | |
86 h->to = to; | |
87 loc = htab_find_slot_with_hash (complex_variable_components, h, | |
88 uid, INSERT); | |
89 *(struct int_tree_map **) loc = h; | |
90 } | |
91 | |
92 /* Return true if T is not a zero constant. In the case of real values, | |
93 we're only interested in +0.0. */ | |
94 | |
95 static int | |
96 some_nonzerop (tree t) | |
97 { | |
98 int zerop = false; | |
99 | |
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100 /* Operations with real or imaginary part of a complex number zero |
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101 cannot be treated the same as operations with a real or imaginary |
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102 operand if we care about the signs of zeros in the result. */ |
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103 if (TREE_CODE (t) == REAL_CST && !flag_signed_zeros) |
0 | 104 zerop = REAL_VALUES_IDENTICAL (TREE_REAL_CST (t), dconst0); |
105 else if (TREE_CODE (t) == FIXED_CST) | |
106 zerop = fixed_zerop (t); | |
107 else if (TREE_CODE (t) == INTEGER_CST) | |
108 zerop = integer_zerop (t); | |
109 | |
110 return !zerop; | |
111 } | |
112 | |
113 | |
114 /* Compute a lattice value from the components of a complex type REAL | |
115 and IMAG. */ | |
116 | |
117 static complex_lattice_t | |
118 find_lattice_value_parts (tree real, tree imag) | |
119 { | |
120 int r, i; | |
121 complex_lattice_t ret; | |
122 | |
123 r = some_nonzerop (real); | |
124 i = some_nonzerop (imag); | |
125 ret = r * ONLY_REAL + i * ONLY_IMAG; | |
126 | |
127 /* ??? On occasion we could do better than mapping 0+0i to real, but we | |
128 certainly don't want to leave it UNINITIALIZED, which eventually gets | |
129 mapped to VARYING. */ | |
130 if (ret == UNINITIALIZED) | |
131 ret = ONLY_REAL; | |
132 | |
133 return ret; | |
134 } | |
135 | |
136 | |
137 /* Compute a lattice value from gimple_val T. */ | |
138 | |
139 static complex_lattice_t | |
140 find_lattice_value (tree t) | |
141 { | |
142 tree real, imag; | |
143 | |
144 switch (TREE_CODE (t)) | |
145 { | |
146 case SSA_NAME: | |
147 return VEC_index (complex_lattice_t, complex_lattice_values, | |
148 SSA_NAME_VERSION (t)); | |
149 | |
150 case COMPLEX_CST: | |
151 real = TREE_REALPART (t); | |
152 imag = TREE_IMAGPART (t); | |
153 break; | |
154 | |
155 default: | |
156 gcc_unreachable (); | |
157 } | |
158 | |
159 return find_lattice_value_parts (real, imag); | |
160 } | |
161 | |
162 /* Determine if LHS is something for which we're interested in seeing | |
163 simulation results. */ | |
164 | |
165 static bool | |
166 is_complex_reg (tree lhs) | |
167 { | |
168 return TREE_CODE (TREE_TYPE (lhs)) == COMPLEX_TYPE && is_gimple_reg (lhs); | |
169 } | |
170 | |
171 /* Mark the incoming parameters to the function as VARYING. */ | |
172 | |
173 static void | |
174 init_parameter_lattice_values (void) | |
175 { | |
176 tree parm, ssa_name; | |
177 | |
178 for (parm = DECL_ARGUMENTS (cfun->decl); parm ; parm = TREE_CHAIN (parm)) | |
179 if (is_complex_reg (parm) | |
180 && var_ann (parm) != NULL | |
181 && (ssa_name = gimple_default_def (cfun, parm)) != NULL_TREE) | |
182 VEC_replace (complex_lattice_t, complex_lattice_values, | |
183 SSA_NAME_VERSION (ssa_name), VARYING); | |
184 } | |
185 | |
186 /* Initialize simulation state for each statement. Return false if we | |
187 found no statements we want to simulate, and thus there's nothing | |
188 for the entire pass to do. */ | |
189 | |
190 static bool | |
191 init_dont_simulate_again (void) | |
192 { | |
193 basic_block bb; | |
194 gimple_stmt_iterator gsi; | |
195 gimple phi; | |
196 bool saw_a_complex_op = false; | |
197 | |
198 FOR_EACH_BB (bb) | |
199 { | |
200 for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
201 { | |
202 phi = gsi_stmt (gsi); | |
203 prop_set_simulate_again (phi, | |
204 is_complex_reg (gimple_phi_result (phi))); | |
205 } | |
206 | |
207 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
208 { | |
209 gimple stmt; | |
210 tree op0, op1; | |
211 bool sim_again_p; | |
212 | |
213 stmt = gsi_stmt (gsi); | |
214 op0 = op1 = NULL_TREE; | |
215 | |
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216 /* Most control-altering statements must be initially |
0 | 217 simulated, else we won't cover the entire cfg. */ |
218 sim_again_p = stmt_ends_bb_p (stmt); | |
219 | |
220 switch (gimple_code (stmt)) | |
221 { | |
222 case GIMPLE_CALL: | |
223 if (gimple_call_lhs (stmt)) | |
224 sim_again_p = is_complex_reg (gimple_call_lhs (stmt)); | |
225 break; | |
226 | |
227 case GIMPLE_ASSIGN: | |
228 sim_again_p = is_complex_reg (gimple_assign_lhs (stmt)); | |
229 if (gimple_assign_rhs_code (stmt) == REALPART_EXPR | |
230 || gimple_assign_rhs_code (stmt) == IMAGPART_EXPR) | |
231 op0 = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0); | |
232 else | |
233 op0 = gimple_assign_rhs1 (stmt); | |
234 if (gimple_num_ops (stmt) > 2) | |
235 op1 = gimple_assign_rhs2 (stmt); | |
236 break; | |
237 | |
238 case GIMPLE_COND: | |
239 op0 = gimple_cond_lhs (stmt); | |
240 op1 = gimple_cond_rhs (stmt); | |
241 break; | |
242 | |
243 default: | |
244 break; | |
245 } | |
246 | |
247 if (op0 || op1) | |
248 switch (gimple_expr_code (stmt)) | |
249 { | |
250 case EQ_EXPR: | |
251 case NE_EXPR: | |
252 case PLUS_EXPR: | |
253 case MINUS_EXPR: | |
254 case MULT_EXPR: | |
255 case TRUNC_DIV_EXPR: | |
256 case CEIL_DIV_EXPR: | |
257 case FLOOR_DIV_EXPR: | |
258 case ROUND_DIV_EXPR: | |
259 case RDIV_EXPR: | |
260 if (TREE_CODE (TREE_TYPE (op0)) == COMPLEX_TYPE | |
261 || TREE_CODE (TREE_TYPE (op1)) == COMPLEX_TYPE) | |
262 saw_a_complex_op = true; | |
263 break; | |
264 | |
265 case NEGATE_EXPR: | |
266 case CONJ_EXPR: | |
267 if (TREE_CODE (TREE_TYPE (op0)) == COMPLEX_TYPE) | |
268 saw_a_complex_op = true; | |
269 break; | |
270 | |
271 case REALPART_EXPR: | |
272 case IMAGPART_EXPR: | |
273 /* The total store transformation performed during | |
274 gimplification creates such uninitialized loads | |
275 and we need to lower the statement to be able | |
276 to fix things up. */ | |
277 if (TREE_CODE (op0) == SSA_NAME | |
278 && ssa_undefined_value_p (op0)) | |
279 saw_a_complex_op = true; | |
280 break; | |
281 | |
282 default: | |
283 break; | |
284 } | |
285 | |
286 prop_set_simulate_again (stmt, sim_again_p); | |
287 } | |
288 } | |
289 | |
290 return saw_a_complex_op; | |
291 } | |
292 | |
293 | |
294 /* Evaluate statement STMT against the complex lattice defined above. */ | |
295 | |
296 static enum ssa_prop_result | |
297 complex_visit_stmt (gimple stmt, edge *taken_edge_p ATTRIBUTE_UNUSED, | |
298 tree *result_p) | |
299 { | |
300 complex_lattice_t new_l, old_l, op1_l, op2_l; | |
301 unsigned int ver; | |
302 tree lhs; | |
303 | |
304 lhs = gimple_get_lhs (stmt); | |
305 /* Skip anything but GIMPLE_ASSIGN and GIMPLE_CALL with a lhs. */ | |
306 if (!lhs) | |
307 return SSA_PROP_VARYING; | |
308 | |
309 /* These conditions should be satisfied due to the initial filter | |
310 set up in init_dont_simulate_again. */ | |
311 gcc_assert (TREE_CODE (lhs) == SSA_NAME); | |
312 gcc_assert (TREE_CODE (TREE_TYPE (lhs)) == COMPLEX_TYPE); | |
313 | |
314 *result_p = lhs; | |
315 ver = SSA_NAME_VERSION (lhs); | |
316 old_l = VEC_index (complex_lattice_t, complex_lattice_values, ver); | |
317 | |
318 switch (gimple_expr_code (stmt)) | |
319 { | |
320 case SSA_NAME: | |
321 case COMPLEX_CST: | |
322 new_l = find_lattice_value (gimple_assign_rhs1 (stmt)); | |
323 break; | |
324 | |
325 case COMPLEX_EXPR: | |
326 new_l = find_lattice_value_parts (gimple_assign_rhs1 (stmt), | |
327 gimple_assign_rhs2 (stmt)); | |
328 break; | |
329 | |
330 case PLUS_EXPR: | |
331 case MINUS_EXPR: | |
332 op1_l = find_lattice_value (gimple_assign_rhs1 (stmt)); | |
333 op2_l = find_lattice_value (gimple_assign_rhs2 (stmt)); | |
334 | |
335 /* We've set up the lattice values such that IOR neatly | |
336 models addition. */ | |
337 new_l = op1_l | op2_l; | |
338 break; | |
339 | |
340 case MULT_EXPR: | |
341 case RDIV_EXPR: | |
342 case TRUNC_DIV_EXPR: | |
343 case CEIL_DIV_EXPR: | |
344 case FLOOR_DIV_EXPR: | |
345 case ROUND_DIV_EXPR: | |
346 op1_l = find_lattice_value (gimple_assign_rhs1 (stmt)); | |
347 op2_l = find_lattice_value (gimple_assign_rhs2 (stmt)); | |
348 | |
349 /* Obviously, if either varies, so does the result. */ | |
350 if (op1_l == VARYING || op2_l == VARYING) | |
351 new_l = VARYING; | |
352 /* Don't prematurely promote variables if we've not yet seen | |
353 their inputs. */ | |
354 else if (op1_l == UNINITIALIZED) | |
355 new_l = op2_l; | |
356 else if (op2_l == UNINITIALIZED) | |
357 new_l = op1_l; | |
358 else | |
359 { | |
360 /* At this point both numbers have only one component. If the | |
361 numbers are of opposite kind, the result is imaginary, | |
362 otherwise the result is real. The add/subtract translates | |
363 the real/imag from/to 0/1; the ^ performs the comparison. */ | |
364 new_l = ((op1_l - ONLY_REAL) ^ (op2_l - ONLY_REAL)) + ONLY_REAL; | |
365 | |
366 /* Don't allow the lattice value to flip-flop indefinitely. */ | |
367 new_l |= old_l; | |
368 } | |
369 break; | |
370 | |
371 case NEGATE_EXPR: | |
372 case CONJ_EXPR: | |
373 new_l = find_lattice_value (gimple_assign_rhs1 (stmt)); | |
374 break; | |
375 | |
376 default: | |
377 new_l = VARYING; | |
378 break; | |
379 } | |
380 | |
381 /* If nothing changed this round, let the propagator know. */ | |
382 if (new_l == old_l) | |
383 return SSA_PROP_NOT_INTERESTING; | |
384 | |
385 VEC_replace (complex_lattice_t, complex_lattice_values, ver, new_l); | |
386 return new_l == VARYING ? SSA_PROP_VARYING : SSA_PROP_INTERESTING; | |
387 } | |
388 | |
389 /* Evaluate a PHI node against the complex lattice defined above. */ | |
390 | |
391 static enum ssa_prop_result | |
392 complex_visit_phi (gimple phi) | |
393 { | |
394 complex_lattice_t new_l, old_l; | |
395 unsigned int ver; | |
396 tree lhs; | |
397 int i; | |
398 | |
399 lhs = gimple_phi_result (phi); | |
400 | |
401 /* This condition should be satisfied due to the initial filter | |
402 set up in init_dont_simulate_again. */ | |
403 gcc_assert (TREE_CODE (TREE_TYPE (lhs)) == COMPLEX_TYPE); | |
404 | |
405 /* We've set up the lattice values such that IOR neatly models PHI meet. */ | |
406 new_l = UNINITIALIZED; | |
407 for (i = gimple_phi_num_args (phi) - 1; i >= 0; --i) | |
408 new_l |= find_lattice_value (gimple_phi_arg_def (phi, i)); | |
409 | |
410 ver = SSA_NAME_VERSION (lhs); | |
411 old_l = VEC_index (complex_lattice_t, complex_lattice_values, ver); | |
412 | |
413 if (new_l == old_l) | |
414 return SSA_PROP_NOT_INTERESTING; | |
415 | |
416 VEC_replace (complex_lattice_t, complex_lattice_values, ver, new_l); | |
417 return new_l == VARYING ? SSA_PROP_VARYING : SSA_PROP_INTERESTING; | |
418 } | |
419 | |
420 /* Create one backing variable for a complex component of ORIG. */ | |
421 | |
422 static tree | |
423 create_one_component_var (tree type, tree orig, const char *prefix, | |
424 const char *suffix, enum tree_code code) | |
425 { | |
426 tree r = create_tmp_var (type, prefix); | |
427 add_referenced_var (r); | |
428 | |
429 DECL_SOURCE_LOCATION (r) = DECL_SOURCE_LOCATION (orig); | |
430 DECL_ARTIFICIAL (r) = 1; | |
431 | |
432 if (DECL_NAME (orig) && !DECL_IGNORED_P (orig)) | |
433 { | |
434 const char *name = IDENTIFIER_POINTER (DECL_NAME (orig)); | |
435 | |
436 DECL_NAME (r) = get_identifier (ACONCAT ((name, suffix, NULL))); | |
437 | |
438 SET_DECL_DEBUG_EXPR (r, build1 (code, type, orig)); | |
439 DECL_DEBUG_EXPR_IS_FROM (r) = 1; | |
440 DECL_IGNORED_P (r) = 0; | |
441 TREE_NO_WARNING (r) = TREE_NO_WARNING (orig); | |
442 } | |
443 else | |
444 { | |
445 DECL_IGNORED_P (r) = 1; | |
446 TREE_NO_WARNING (r) = 1; | |
447 } | |
448 | |
449 return r; | |
450 } | |
451 | |
452 /* Retrieve a value for a complex component of VAR. */ | |
453 | |
454 static tree | |
455 get_component_var (tree var, bool imag_p) | |
456 { | |
457 size_t decl_index = DECL_UID (var) * 2 + imag_p; | |
458 tree ret = cvc_lookup (decl_index); | |
459 | |
460 if (ret == NULL) | |
461 { | |
462 ret = create_one_component_var (TREE_TYPE (TREE_TYPE (var)), var, | |
463 imag_p ? "CI" : "CR", | |
464 imag_p ? "$imag" : "$real", | |
465 imag_p ? IMAGPART_EXPR : REALPART_EXPR); | |
466 cvc_insert (decl_index, ret); | |
467 } | |
468 | |
469 return ret; | |
470 } | |
471 | |
472 /* Retrieve a value for a complex component of SSA_NAME. */ | |
473 | |
474 static tree | |
475 get_component_ssa_name (tree ssa_name, bool imag_p) | |
476 { | |
477 complex_lattice_t lattice = find_lattice_value (ssa_name); | |
478 size_t ssa_name_index; | |
479 tree ret; | |
480 | |
481 if (lattice == (imag_p ? ONLY_REAL : ONLY_IMAG)) | |
482 { | |
483 tree inner_type = TREE_TYPE (TREE_TYPE (ssa_name)); | |
484 if (SCALAR_FLOAT_TYPE_P (inner_type)) | |
485 return build_real (inner_type, dconst0); | |
486 else | |
487 return build_int_cst (inner_type, 0); | |
488 } | |
489 | |
490 ssa_name_index = SSA_NAME_VERSION (ssa_name) * 2 + imag_p; | |
491 ret = VEC_index (tree, complex_ssa_name_components, ssa_name_index); | |
492 if (ret == NULL) | |
493 { | |
494 ret = get_component_var (SSA_NAME_VAR (ssa_name), imag_p); | |
495 ret = make_ssa_name (ret, NULL); | |
496 | |
497 /* Copy some properties from the original. In particular, whether it | |
498 is used in an abnormal phi, and whether it's uninitialized. */ | |
499 SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ret) | |
500 = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name); | |
501 if (TREE_CODE (SSA_NAME_VAR (ssa_name)) == VAR_DECL | |
502 && gimple_nop_p (SSA_NAME_DEF_STMT (ssa_name))) | |
503 { | |
504 SSA_NAME_DEF_STMT (ret) = SSA_NAME_DEF_STMT (ssa_name); | |
505 set_default_def (SSA_NAME_VAR (ret), ret); | |
506 } | |
507 | |
508 VEC_replace (tree, complex_ssa_name_components, ssa_name_index, ret); | |
509 } | |
510 | |
511 return ret; | |
512 } | |
513 | |
514 /* Set a value for a complex component of SSA_NAME, return a | |
515 gimple_seq of stuff that needs doing. */ | |
516 | |
517 static gimple_seq | |
518 set_component_ssa_name (tree ssa_name, bool imag_p, tree value) | |
519 { | |
520 complex_lattice_t lattice = find_lattice_value (ssa_name); | |
521 size_t ssa_name_index; | |
522 tree comp; | |
523 gimple last; | |
524 gimple_seq list; | |
525 | |
526 /* We know the value must be zero, else there's a bug in our lattice | |
527 analysis. But the value may well be a variable known to contain | |
528 zero. We should be safe ignoring it. */ | |
529 if (lattice == (imag_p ? ONLY_REAL : ONLY_IMAG)) | |
530 return NULL; | |
531 | |
532 /* If we've already assigned an SSA_NAME to this component, then this | |
533 means that our walk of the basic blocks found a use before the set. | |
534 This is fine. Now we should create an initialization for the value | |
535 we created earlier. */ | |
536 ssa_name_index = SSA_NAME_VERSION (ssa_name) * 2 + imag_p; | |
537 comp = VEC_index (tree, complex_ssa_name_components, ssa_name_index); | |
538 if (comp) | |
539 ; | |
540 | |
541 /* If we've nothing assigned, and the value we're given is already stable, | |
542 then install that as the value for this SSA_NAME. This preemptively | |
543 copy-propagates the value, which avoids unnecessary memory allocation. */ | |
544 else if (is_gimple_min_invariant (value) | |
545 && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name)) | |
546 { | |
547 VEC_replace (tree, complex_ssa_name_components, ssa_name_index, value); | |
548 return NULL; | |
549 } | |
550 else if (TREE_CODE (value) == SSA_NAME | |
551 && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name)) | |
552 { | |
553 /* Replace an anonymous base value with the variable from cvc_lookup. | |
554 This should result in better debug info. */ | |
555 if (DECL_IGNORED_P (SSA_NAME_VAR (value)) | |
556 && !DECL_IGNORED_P (SSA_NAME_VAR (ssa_name))) | |
557 { | |
558 comp = get_component_var (SSA_NAME_VAR (ssa_name), imag_p); | |
559 replace_ssa_name_symbol (value, comp); | |
560 } | |
561 | |
562 VEC_replace (tree, complex_ssa_name_components, ssa_name_index, value); | |
563 return NULL; | |
564 } | |
565 | |
566 /* Finally, we need to stabilize the result by installing the value into | |
567 a new ssa name. */ | |
568 else | |
569 comp = get_component_ssa_name (ssa_name, imag_p); | |
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570 |
0 | 571 /* Do all the work to assign VALUE to COMP. */ |
572 list = NULL; | |
573 value = force_gimple_operand (value, &list, false, NULL); | |
574 last = gimple_build_assign (comp, value); | |
575 gimple_seq_add_stmt (&list, last); | |
576 gcc_assert (SSA_NAME_DEF_STMT (comp) == last); | |
577 | |
578 return list; | |
579 } | |
580 | |
581 /* Extract the real or imaginary part of a complex variable or constant. | |
582 Make sure that it's a proper gimple_val and gimplify it if not. | |
583 Emit any new code before gsi. */ | |
584 | |
585 static tree | |
586 extract_component (gimple_stmt_iterator *gsi, tree t, bool imagpart_p, | |
587 bool gimple_p) | |
588 { | |
589 switch (TREE_CODE (t)) | |
590 { | |
591 case COMPLEX_CST: | |
592 return imagpart_p ? TREE_IMAGPART (t) : TREE_REALPART (t); | |
593 | |
594 case COMPLEX_EXPR: | |
595 gcc_unreachable (); | |
596 | |
597 case VAR_DECL: | |
598 case RESULT_DECL: | |
599 case PARM_DECL: | |
600 case INDIRECT_REF: | |
601 case COMPONENT_REF: | |
602 case ARRAY_REF: | |
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603 case VIEW_CONVERT_EXPR: |
0 | 604 { |
605 tree inner_type = TREE_TYPE (TREE_TYPE (t)); | |
606 | |
607 t = build1 ((imagpart_p ? IMAGPART_EXPR : REALPART_EXPR), | |
608 inner_type, unshare_expr (t)); | |
609 | |
610 if (gimple_p) | |
611 t = force_gimple_operand_gsi (gsi, t, true, NULL, true, | |
612 GSI_SAME_STMT); | |
613 | |
614 return t; | |
615 } | |
616 | |
617 case SSA_NAME: | |
618 return get_component_ssa_name (t, imagpart_p); | |
619 | |
620 default: | |
621 gcc_unreachable (); | |
622 } | |
623 } | |
624 | |
625 /* Update the complex components of the ssa name on the lhs of STMT. */ | |
626 | |
627 static void | |
628 update_complex_components (gimple_stmt_iterator *gsi, gimple stmt, tree r, | |
629 tree i) | |
630 { | |
631 tree lhs; | |
632 gimple_seq list; | |
633 | |
634 lhs = gimple_get_lhs (stmt); | |
635 | |
636 list = set_component_ssa_name (lhs, false, r); | |
637 if (list) | |
638 gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING); | |
639 | |
640 list = set_component_ssa_name (lhs, true, i); | |
641 if (list) | |
642 gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING); | |
643 } | |
644 | |
645 static void | |
646 update_complex_components_on_edge (edge e, tree lhs, tree r, tree i) | |
647 { | |
648 gimple_seq list; | |
649 | |
650 list = set_component_ssa_name (lhs, false, r); | |
651 if (list) | |
652 gsi_insert_seq_on_edge (e, list); | |
653 | |
654 list = set_component_ssa_name (lhs, true, i); | |
655 if (list) | |
656 gsi_insert_seq_on_edge (e, list); | |
657 } | |
658 | |
659 | |
660 /* Update an assignment to a complex variable in place. */ | |
661 | |
662 static void | |
663 update_complex_assignment (gimple_stmt_iterator *gsi, tree r, tree i) | |
664 { | |
665 gimple_stmt_iterator orig_si = *gsi; | |
666 | |
667 if (gimple_in_ssa_p (cfun)) | |
668 update_complex_components (gsi, gsi_stmt (*gsi), r, i); | |
669 | |
670 gimple_assign_set_rhs_with_ops (&orig_si, COMPLEX_EXPR, r, i); | |
671 update_stmt (gsi_stmt (orig_si)); | |
672 } | |
673 | |
674 | |
675 /* Generate code at the entry point of the function to initialize the | |
676 component variables for a complex parameter. */ | |
677 | |
678 static void | |
679 update_parameter_components (void) | |
680 { | |
681 edge entry_edge = single_succ_edge (ENTRY_BLOCK_PTR); | |
682 tree parm; | |
683 | |
684 for (parm = DECL_ARGUMENTS (cfun->decl); parm ; parm = TREE_CHAIN (parm)) | |
685 { | |
686 tree type = TREE_TYPE (parm); | |
687 tree ssa_name, r, i; | |
688 | |
689 if (TREE_CODE (type) != COMPLEX_TYPE || !is_gimple_reg (parm)) | |
690 continue; | |
691 | |
692 type = TREE_TYPE (type); | |
693 ssa_name = gimple_default_def (cfun, parm); | |
694 if (!ssa_name) | |
695 continue; | |
696 | |
697 r = build1 (REALPART_EXPR, type, ssa_name); | |
698 i = build1 (IMAGPART_EXPR, type, ssa_name); | |
699 update_complex_components_on_edge (entry_edge, ssa_name, r, i); | |
700 } | |
701 } | |
702 | |
703 /* Generate code to set the component variables of a complex variable | |
704 to match the PHI statements in block BB. */ | |
705 | |
706 static void | |
707 update_phi_components (basic_block bb) | |
708 { | |
709 gimple_stmt_iterator gsi; | |
710 | |
711 for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
712 { | |
713 gimple phi = gsi_stmt (gsi); | |
714 | |
715 if (is_complex_reg (gimple_phi_result (phi))) | |
716 { | |
717 tree lr, li; | |
718 gimple pr = NULL, pi = NULL; | |
719 unsigned int i, n; | |
720 | |
721 lr = get_component_ssa_name (gimple_phi_result (phi), false); | |
722 if (TREE_CODE (lr) == SSA_NAME) | |
723 { | |
724 pr = create_phi_node (lr, bb); | |
725 SSA_NAME_DEF_STMT (lr) = pr; | |
726 } | |
727 | |
728 li = get_component_ssa_name (gimple_phi_result (phi), true); | |
729 if (TREE_CODE (li) == SSA_NAME) | |
730 { | |
731 pi = create_phi_node (li, bb); | |
732 SSA_NAME_DEF_STMT (li) = pi; | |
733 } | |
734 | |
735 for (i = 0, n = gimple_phi_num_args (phi); i < n; ++i) | |
736 { | |
737 tree comp, arg = gimple_phi_arg_def (phi, i); | |
738 if (pr) | |
739 { | |
740 comp = extract_component (NULL, arg, false, false); | |
741 SET_PHI_ARG_DEF (pr, i, comp); | |
742 } | |
743 if (pi) | |
744 { | |
745 comp = extract_component (NULL, arg, true, false); | |
746 SET_PHI_ARG_DEF (pi, i, comp); | |
747 } | |
748 } | |
749 } | |
750 } | |
751 } | |
752 | |
753 /* Expand a complex move to scalars. */ | |
754 | |
755 static void | |
756 expand_complex_move (gimple_stmt_iterator *gsi, tree type) | |
757 { | |
758 tree inner_type = TREE_TYPE (type); | |
759 tree r, i, lhs, rhs; | |
760 gimple stmt = gsi_stmt (*gsi); | |
761 | |
762 if (is_gimple_assign (stmt)) | |
763 { | |
764 lhs = gimple_assign_lhs (stmt); | |
765 if (gimple_num_ops (stmt) == 2) | |
766 rhs = gimple_assign_rhs1 (stmt); | |
767 else | |
768 rhs = NULL_TREE; | |
769 } | |
770 else if (is_gimple_call (stmt)) | |
771 { | |
772 lhs = gimple_call_lhs (stmt); | |
773 rhs = NULL_TREE; | |
774 } | |
775 else | |
776 gcc_unreachable (); | |
777 | |
778 if (TREE_CODE (lhs) == SSA_NAME) | |
779 { | |
780 if (is_ctrl_altering_stmt (stmt)) | |
781 { | |
782 edge_iterator ei; | |
783 edge e; | |
784 | |
785 /* The value is not assigned on the exception edges, so we need not | |
786 concern ourselves there. We do need to update on the fallthru | |
787 edge. Find it. */ | |
788 FOR_EACH_EDGE (e, ei, gsi_bb (*gsi)->succs) | |
789 if (e->flags & EDGE_FALLTHRU) | |
790 goto found_fallthru; | |
791 gcc_unreachable (); | |
792 found_fallthru: | |
793 | |
794 r = build1 (REALPART_EXPR, inner_type, lhs); | |
795 i = build1 (IMAGPART_EXPR, inner_type, lhs); | |
796 update_complex_components_on_edge (e, lhs, r, i); | |
797 } | |
798 else if (is_gimple_call (stmt) | |
799 || gimple_has_side_effects (stmt) | |
800 || gimple_assign_rhs_code (stmt) == PAREN_EXPR) | |
801 { | |
802 r = build1 (REALPART_EXPR, inner_type, lhs); | |
803 i = build1 (IMAGPART_EXPR, inner_type, lhs); | |
804 update_complex_components (gsi, stmt, r, i); | |
805 } | |
806 else | |
807 { | |
808 if (gimple_assign_rhs_code (stmt) != COMPLEX_EXPR) | |
809 { | |
810 r = extract_component (gsi, rhs, 0, true); | |
811 i = extract_component (gsi, rhs, 1, true); | |
812 } | |
813 else | |
814 { | |
815 r = gimple_assign_rhs1 (stmt); | |
816 i = gimple_assign_rhs2 (stmt); | |
817 } | |
818 update_complex_assignment (gsi, r, i); | |
819 } | |
820 } | |
821 else if (rhs && TREE_CODE (rhs) == SSA_NAME && !TREE_SIDE_EFFECTS (lhs)) | |
822 { | |
823 tree x; | |
824 gimple t; | |
825 | |
826 r = extract_component (gsi, rhs, 0, false); | |
827 i = extract_component (gsi, rhs, 1, false); | |
828 | |
829 x = build1 (REALPART_EXPR, inner_type, unshare_expr (lhs)); | |
830 t = gimple_build_assign (x, r); | |
831 gsi_insert_before (gsi, t, GSI_SAME_STMT); | |
832 | |
833 if (stmt == gsi_stmt (*gsi)) | |
834 { | |
835 x = build1 (IMAGPART_EXPR, inner_type, unshare_expr (lhs)); | |
836 gimple_assign_set_lhs (stmt, x); | |
837 gimple_assign_set_rhs1 (stmt, i); | |
838 } | |
839 else | |
840 { | |
841 x = build1 (IMAGPART_EXPR, inner_type, unshare_expr (lhs)); | |
842 t = gimple_build_assign (x, i); | |
843 gsi_insert_before (gsi, t, GSI_SAME_STMT); | |
844 | |
845 stmt = gsi_stmt (*gsi); | |
846 gcc_assert (gimple_code (stmt) == GIMPLE_RETURN); | |
847 gimple_return_set_retval (stmt, lhs); | |
848 } | |
849 | |
850 update_stmt (stmt); | |
851 } | |
852 } | |
853 | |
854 /* Expand complex addition to scalars: | |
855 a + b = (ar + br) + i(ai + bi) | |
856 a - b = (ar - br) + i(ai + bi) | |
857 */ | |
858 | |
859 static void | |
860 expand_complex_addition (gimple_stmt_iterator *gsi, tree inner_type, | |
861 tree ar, tree ai, tree br, tree bi, | |
862 enum tree_code code, | |
863 complex_lattice_t al, complex_lattice_t bl) | |
864 { | |
865 tree rr, ri; | |
866 | |
867 switch (PAIR (al, bl)) | |
868 { | |
869 case PAIR (ONLY_REAL, ONLY_REAL): | |
870 rr = gimplify_build2 (gsi, code, inner_type, ar, br); | |
871 ri = ai; | |
872 break; | |
873 | |
874 case PAIR (ONLY_REAL, ONLY_IMAG): | |
875 rr = ar; | |
876 if (code == MINUS_EXPR) | |
877 ri = gimplify_build2 (gsi, MINUS_EXPR, inner_type, ai, bi); | |
878 else | |
879 ri = bi; | |
880 break; | |
881 | |
882 case PAIR (ONLY_IMAG, ONLY_REAL): | |
883 if (code == MINUS_EXPR) | |
884 rr = gimplify_build2 (gsi, MINUS_EXPR, inner_type, ar, br); | |
885 else | |
886 rr = br; | |
887 ri = ai; | |
888 break; | |
889 | |
890 case PAIR (ONLY_IMAG, ONLY_IMAG): | |
891 rr = ar; | |
892 ri = gimplify_build2 (gsi, code, inner_type, ai, bi); | |
893 break; | |
894 | |
895 case PAIR (VARYING, ONLY_REAL): | |
896 rr = gimplify_build2 (gsi, code, inner_type, ar, br); | |
897 ri = ai; | |
898 break; | |
899 | |
900 case PAIR (VARYING, ONLY_IMAG): | |
901 rr = ar; | |
902 ri = gimplify_build2 (gsi, code, inner_type, ai, bi); | |
903 break; | |
904 | |
905 case PAIR (ONLY_REAL, VARYING): | |
906 if (code == MINUS_EXPR) | |
907 goto general; | |
908 rr = gimplify_build2 (gsi, code, inner_type, ar, br); | |
909 ri = bi; | |
910 break; | |
911 | |
912 case PAIR (ONLY_IMAG, VARYING): | |
913 if (code == MINUS_EXPR) | |
914 goto general; | |
915 rr = br; | |
916 ri = gimplify_build2 (gsi, code, inner_type, ai, bi); | |
917 break; | |
918 | |
919 case PAIR (VARYING, VARYING): | |
920 general: | |
921 rr = gimplify_build2 (gsi, code, inner_type, ar, br); | |
922 ri = gimplify_build2 (gsi, code, inner_type, ai, bi); | |
923 break; | |
924 | |
925 default: | |
926 gcc_unreachable (); | |
927 } | |
928 | |
929 update_complex_assignment (gsi, rr, ri); | |
930 } | |
931 | |
932 /* Expand a complex multiplication or division to a libcall to the c99 | |
933 compliant routines. */ | |
934 | |
935 static void | |
936 expand_complex_libcall (gimple_stmt_iterator *gsi, tree ar, tree ai, | |
937 tree br, tree bi, enum tree_code code) | |
938 { | |
939 enum machine_mode mode; | |
940 enum built_in_function bcode; | |
941 tree fn, type, lhs; | |
942 gimple old_stmt, stmt; | |
943 | |
944 old_stmt = gsi_stmt (*gsi); | |
945 lhs = gimple_assign_lhs (old_stmt); | |
946 type = TREE_TYPE (lhs); | |
947 | |
948 mode = TYPE_MODE (type); | |
949 gcc_assert (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT); | |
950 | |
951 if (code == MULT_EXPR) | |
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952 bcode = ((enum built_in_function) |
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953 (BUILT_IN_COMPLEX_MUL_MIN + mode - MIN_MODE_COMPLEX_FLOAT)); |
0 | 954 else if (code == RDIV_EXPR) |
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955 bcode = ((enum built_in_function) |
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956 (BUILT_IN_COMPLEX_DIV_MIN + mode - MIN_MODE_COMPLEX_FLOAT)); |
0 | 957 else |
958 gcc_unreachable (); | |
959 fn = built_in_decls[bcode]; | |
960 | |
961 stmt = gimple_build_call (fn, 4, ar, ai, br, bi); | |
962 gimple_call_set_lhs (stmt, lhs); | |
963 update_stmt (stmt); | |
964 gsi_replace (gsi, stmt, false); | |
965 | |
966 if (maybe_clean_or_replace_eh_stmt (old_stmt, stmt)) | |
967 gimple_purge_dead_eh_edges (gsi_bb (*gsi)); | |
968 | |
969 if (gimple_in_ssa_p (cfun)) | |
970 { | |
971 type = TREE_TYPE (type); | |
972 update_complex_components (gsi, stmt, | |
973 build1 (REALPART_EXPR, type, lhs), | |
974 build1 (IMAGPART_EXPR, type, lhs)); | |
975 SSA_NAME_DEF_STMT (lhs) = stmt; | |
976 } | |
977 } | |
978 | |
979 /* Expand complex multiplication to scalars: | |
980 a * b = (ar*br - ai*bi) + i(ar*bi + br*ai) | |
981 */ | |
982 | |
983 static void | |
984 expand_complex_multiplication (gimple_stmt_iterator *gsi, tree inner_type, | |
985 tree ar, tree ai, tree br, tree bi, | |
986 complex_lattice_t al, complex_lattice_t bl) | |
987 { | |
988 tree rr, ri; | |
989 | |
990 if (al < bl) | |
991 { | |
992 complex_lattice_t tl; | |
993 rr = ar, ar = br, br = rr; | |
994 ri = ai, ai = bi, bi = ri; | |
995 tl = al, al = bl, bl = tl; | |
996 } | |
997 | |
998 switch (PAIR (al, bl)) | |
999 { | |
1000 case PAIR (ONLY_REAL, ONLY_REAL): | |
1001 rr = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, br); | |
1002 ri = ai; | |
1003 break; | |
1004 | |
1005 case PAIR (ONLY_IMAG, ONLY_REAL): | |
1006 rr = ar; | |
1007 if (TREE_CODE (ai) == REAL_CST | |
1008 && REAL_VALUES_IDENTICAL (TREE_REAL_CST (ai), dconst1)) | |
1009 ri = br; | |
1010 else | |
1011 ri = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br); | |
1012 break; | |
1013 | |
1014 case PAIR (ONLY_IMAG, ONLY_IMAG): | |
1015 rr = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, bi); | |
1016 rr = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, rr); | |
1017 ri = ar; | |
1018 break; | |
1019 | |
1020 case PAIR (VARYING, ONLY_REAL): | |
1021 rr = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, br); | |
1022 ri = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br); | |
1023 break; | |
1024 | |
1025 case PAIR (VARYING, ONLY_IMAG): | |
1026 rr = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, bi); | |
1027 rr = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, rr); | |
1028 ri = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, bi); | |
1029 break; | |
1030 | |
1031 case PAIR (VARYING, VARYING): | |
1032 if (flag_complex_method == 2 && SCALAR_FLOAT_TYPE_P (inner_type)) | |
1033 { | |
1034 expand_complex_libcall (gsi, ar, ai, br, bi, MULT_EXPR); | |
1035 return; | |
1036 } | |
1037 else | |
1038 { | |
1039 tree t1, t2, t3, t4; | |
1040 | |
1041 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, br); | |
1042 t2 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, bi); | |
1043 t3 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, bi); | |
1044 | |
1045 /* Avoid expanding redundant multiplication for the common | |
1046 case of squaring a complex number. */ | |
1047 if (ar == br && ai == bi) | |
1048 t4 = t3; | |
1049 else | |
1050 t4 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br); | |
1051 | |
1052 rr = gimplify_build2 (gsi, MINUS_EXPR, inner_type, t1, t2); | |
1053 ri = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t3, t4); | |
1054 } | |
1055 break; | |
1056 | |
1057 default: | |
1058 gcc_unreachable (); | |
1059 } | |
1060 | |
1061 update_complex_assignment (gsi, rr, ri); | |
1062 } | |
1063 | |
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1064 /* Keep this algorithm in sync with fold-const.c:const_binop(). |
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1065 |
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1066 Expand complex division to scalars, straightforward algorithm. |
0 | 1067 a / b = ((ar*br + ai*bi)/t) + i((ai*br - ar*bi)/t) |
1068 t = br*br + bi*bi | |
1069 */ | |
1070 | |
1071 static void | |
1072 expand_complex_div_straight (gimple_stmt_iterator *gsi, tree inner_type, | |
1073 tree ar, tree ai, tree br, tree bi, | |
1074 enum tree_code code) | |
1075 { | |
1076 tree rr, ri, div, t1, t2, t3; | |
1077 | |
1078 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, br, br); | |
1079 t2 = gimplify_build2 (gsi, MULT_EXPR, inner_type, bi, bi); | |
1080 div = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, t2); | |
1081 | |
1082 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, br); | |
1083 t2 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, bi); | |
1084 t3 = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, t2); | |
1085 rr = gimplify_build2 (gsi, code, inner_type, t3, div); | |
1086 | |
1087 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br); | |
1088 t2 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, bi); | |
1089 t3 = gimplify_build2 (gsi, MINUS_EXPR, inner_type, t1, t2); | |
1090 ri = gimplify_build2 (gsi, code, inner_type, t3, div); | |
1091 | |
1092 update_complex_assignment (gsi, rr, ri); | |
1093 } | |
1094 | |
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1095 /* Keep this algorithm in sync with fold-const.c:const_binop(). |
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1096 |
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1097 Expand complex division to scalars, modified algorithm to minimize |
0 | 1098 overflow with wide input ranges. */ |
1099 | |
1100 static void | |
1101 expand_complex_div_wide (gimple_stmt_iterator *gsi, tree inner_type, | |
1102 tree ar, tree ai, tree br, tree bi, | |
1103 enum tree_code code) | |
1104 { | |
1105 tree rr, ri, ratio, div, t1, t2, tr, ti, compare; | |
1106 basic_block bb_cond, bb_true, bb_false, bb_join; | |
1107 gimple stmt; | |
1108 | |
1109 /* Examine |br| < |bi|, and branch. */ | |
1110 t1 = gimplify_build1 (gsi, ABS_EXPR, inner_type, br); | |
1111 t2 = gimplify_build1 (gsi, ABS_EXPR, inner_type, bi); | |
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1112 compare = fold_build2_loc (gimple_location (gsi_stmt (*gsi)), |
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1113 LT_EXPR, boolean_type_node, t1, t2); |
0 | 1114 STRIP_NOPS (compare); |
1115 | |
1116 bb_cond = bb_true = bb_false = bb_join = NULL; | |
1117 rr = ri = tr = ti = NULL; | |
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1118 if (TREE_CODE (compare) != INTEGER_CST) |
0 | 1119 { |
1120 edge e; | |
1121 gimple stmt; | |
1122 tree cond, tmp; | |
1123 | |
1124 tmp = create_tmp_var (boolean_type_node, NULL); | |
1125 stmt = gimple_build_assign (tmp, compare); | |
1126 if (gimple_in_ssa_p (cfun)) | |
1127 { | |
1128 tmp = make_ssa_name (tmp, stmt); | |
1129 gimple_assign_set_lhs (stmt, tmp); | |
1130 } | |
1131 | |
1132 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1133 | |
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1134 cond = fold_build2_loc (gimple_location (stmt), |
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1135 EQ_EXPR, boolean_type_node, tmp, boolean_true_node); |
0 | 1136 stmt = gimple_build_cond_from_tree (cond, NULL_TREE, NULL_TREE); |
1137 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1138 | |
1139 /* Split the original block, and create the TRUE and FALSE blocks. */ | |
1140 e = split_block (gsi_bb (*gsi), stmt); | |
1141 bb_cond = e->src; | |
1142 bb_join = e->dest; | |
1143 bb_true = create_empty_bb (bb_cond); | |
1144 bb_false = create_empty_bb (bb_true); | |
1145 | |
1146 /* Wire the blocks together. */ | |
1147 e->flags = EDGE_TRUE_VALUE; | |
1148 redirect_edge_succ (e, bb_true); | |
1149 make_edge (bb_cond, bb_false, EDGE_FALSE_VALUE); | |
1150 make_edge (bb_true, bb_join, EDGE_FALLTHRU); | |
1151 make_edge (bb_false, bb_join, EDGE_FALLTHRU); | |
1152 | |
1153 /* Update dominance info. Note that bb_join's data was | |
1154 updated by split_block. */ | |
1155 if (dom_info_available_p (CDI_DOMINATORS)) | |
1156 { | |
1157 set_immediate_dominator (CDI_DOMINATORS, bb_true, bb_cond); | |
1158 set_immediate_dominator (CDI_DOMINATORS, bb_false, bb_cond); | |
1159 } | |
1160 | |
1161 rr = make_rename_temp (inner_type, NULL); | |
1162 ri = make_rename_temp (inner_type, NULL); | |
1163 } | |
1164 | |
1165 /* In the TRUE branch, we compute | |
1166 ratio = br/bi; | |
1167 div = (br * ratio) + bi; | |
1168 tr = (ar * ratio) + ai; | |
1169 ti = (ai * ratio) - ar; | |
1170 tr = tr / div; | |
1171 ti = ti / div; */ | |
1172 if (bb_true || integer_nonzerop (compare)) | |
1173 { | |
1174 if (bb_true) | |
1175 { | |
1176 *gsi = gsi_last_bb (bb_true); | |
1177 gsi_insert_after (gsi, gimple_build_nop (), GSI_NEW_STMT); | |
1178 } | |
1179 | |
1180 ratio = gimplify_build2 (gsi, code, inner_type, br, bi); | |
1181 | |
1182 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, br, ratio); | |
1183 div = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, bi); | |
1184 | |
1185 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, ratio); | |
1186 tr = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, ai); | |
1187 | |
1188 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, ratio); | |
1189 ti = gimplify_build2 (gsi, MINUS_EXPR, inner_type, t1, ar); | |
1190 | |
1191 tr = gimplify_build2 (gsi, code, inner_type, tr, div); | |
1192 ti = gimplify_build2 (gsi, code, inner_type, ti, div); | |
1193 | |
1194 if (bb_true) | |
1195 { | |
1196 stmt = gimple_build_assign (rr, tr); | |
1197 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1198 stmt = gimple_build_assign (ri, ti); | |
1199 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1200 gsi_remove (gsi, true); | |
1201 } | |
1202 } | |
1203 | |
1204 /* In the FALSE branch, we compute | |
1205 ratio = d/c; | |
1206 divisor = (d * ratio) + c; | |
1207 tr = (b * ratio) + a; | |
1208 ti = b - (a * ratio); | |
1209 tr = tr / div; | |
1210 ti = ti / div; */ | |
1211 if (bb_false || integer_zerop (compare)) | |
1212 { | |
1213 if (bb_false) | |
1214 { | |
1215 *gsi = gsi_last_bb (bb_false); | |
1216 gsi_insert_after (gsi, gimple_build_nop (), GSI_NEW_STMT); | |
1217 } | |
1218 | |
1219 ratio = gimplify_build2 (gsi, code, inner_type, bi, br); | |
1220 | |
1221 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, bi, ratio); | |
1222 div = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, br); | |
1223 | |
1224 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, ratio); | |
1225 tr = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, ar); | |
1226 | |
1227 t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, ratio); | |
1228 ti = gimplify_build2 (gsi, MINUS_EXPR, inner_type, ai, t1); | |
1229 | |
1230 tr = gimplify_build2 (gsi, code, inner_type, tr, div); | |
1231 ti = gimplify_build2 (gsi, code, inner_type, ti, div); | |
1232 | |
1233 if (bb_false) | |
1234 { | |
1235 stmt = gimple_build_assign (rr, tr); | |
1236 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1237 stmt = gimple_build_assign (ri, ti); | |
1238 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1239 gsi_remove (gsi, true); | |
1240 } | |
1241 } | |
1242 | |
1243 if (bb_join) | |
1244 *gsi = gsi_start_bb (bb_join); | |
1245 else | |
1246 rr = tr, ri = ti; | |
1247 | |
1248 update_complex_assignment (gsi, rr, ri); | |
1249 } | |
1250 | |
1251 /* Expand complex division to scalars. */ | |
1252 | |
1253 static void | |
1254 expand_complex_division (gimple_stmt_iterator *gsi, tree inner_type, | |
1255 tree ar, tree ai, tree br, tree bi, | |
1256 enum tree_code code, | |
1257 complex_lattice_t al, complex_lattice_t bl) | |
1258 { | |
1259 tree rr, ri; | |
1260 | |
1261 switch (PAIR (al, bl)) | |
1262 { | |
1263 case PAIR (ONLY_REAL, ONLY_REAL): | |
1264 rr = gimplify_build2 (gsi, code, inner_type, ar, br); | |
1265 ri = ai; | |
1266 break; | |
1267 | |
1268 case PAIR (ONLY_REAL, ONLY_IMAG): | |
1269 rr = ai; | |
1270 ri = gimplify_build2 (gsi, code, inner_type, ar, bi); | |
1271 ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ri); | |
1272 break; | |
1273 | |
1274 case PAIR (ONLY_IMAG, ONLY_REAL): | |
1275 rr = ar; | |
1276 ri = gimplify_build2 (gsi, code, inner_type, ai, br); | |
1277 break; | |
1278 | |
1279 case PAIR (ONLY_IMAG, ONLY_IMAG): | |
1280 rr = gimplify_build2 (gsi, code, inner_type, ai, bi); | |
1281 ri = ar; | |
1282 break; | |
1283 | |
1284 case PAIR (VARYING, ONLY_REAL): | |
1285 rr = gimplify_build2 (gsi, code, inner_type, ar, br); | |
1286 ri = gimplify_build2 (gsi, code, inner_type, ai, br); | |
1287 break; | |
1288 | |
1289 case PAIR (VARYING, ONLY_IMAG): | |
1290 rr = gimplify_build2 (gsi, code, inner_type, ai, bi); | |
1291 ri = gimplify_build2 (gsi, code, inner_type, ar, bi); | |
1292 ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ri); | |
1293 | |
1294 case PAIR (ONLY_REAL, VARYING): | |
1295 case PAIR (ONLY_IMAG, VARYING): | |
1296 case PAIR (VARYING, VARYING): | |
1297 switch (flag_complex_method) | |
1298 { | |
1299 case 0: | |
1300 /* straightforward implementation of complex divide acceptable. */ | |
1301 expand_complex_div_straight (gsi, inner_type, ar, ai, br, bi, code); | |
1302 break; | |
1303 | |
1304 case 2: | |
1305 if (SCALAR_FLOAT_TYPE_P (inner_type)) | |
1306 { | |
1307 expand_complex_libcall (gsi, ar, ai, br, bi, code); | |
1308 break; | |
1309 } | |
1310 /* FALLTHRU */ | |
1311 | |
1312 case 1: | |
1313 /* wide ranges of inputs must work for complex divide. */ | |
1314 expand_complex_div_wide (gsi, inner_type, ar, ai, br, bi, code); | |
1315 break; | |
1316 | |
1317 default: | |
1318 gcc_unreachable (); | |
1319 } | |
1320 return; | |
1321 | |
1322 default: | |
1323 gcc_unreachable (); | |
1324 } | |
1325 | |
1326 update_complex_assignment (gsi, rr, ri); | |
1327 } | |
1328 | |
1329 /* Expand complex negation to scalars: | |
1330 -a = (-ar) + i(-ai) | |
1331 */ | |
1332 | |
1333 static void | |
1334 expand_complex_negation (gimple_stmt_iterator *gsi, tree inner_type, | |
1335 tree ar, tree ai) | |
1336 { | |
1337 tree rr, ri; | |
1338 | |
1339 rr = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ar); | |
1340 ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ai); | |
1341 | |
1342 update_complex_assignment (gsi, rr, ri); | |
1343 } | |
1344 | |
1345 /* Expand complex conjugate to scalars: | |
1346 ~a = (ar) + i(-ai) | |
1347 */ | |
1348 | |
1349 static void | |
1350 expand_complex_conjugate (gimple_stmt_iterator *gsi, tree inner_type, | |
1351 tree ar, tree ai) | |
1352 { | |
1353 tree ri; | |
1354 | |
1355 ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ai); | |
1356 | |
1357 update_complex_assignment (gsi, ar, ri); | |
1358 } | |
1359 | |
1360 /* Expand complex comparison (EQ or NE only). */ | |
1361 | |
1362 static void | |
1363 expand_complex_comparison (gimple_stmt_iterator *gsi, tree ar, tree ai, | |
1364 tree br, tree bi, enum tree_code code) | |
1365 { | |
1366 tree cr, ci, cc, type; | |
1367 gimple stmt; | |
1368 | |
1369 cr = gimplify_build2 (gsi, code, boolean_type_node, ar, br); | |
1370 ci = gimplify_build2 (gsi, code, boolean_type_node, ai, bi); | |
1371 cc = gimplify_build2 (gsi, | |
1372 (code == EQ_EXPR ? TRUTH_AND_EXPR : TRUTH_OR_EXPR), | |
1373 boolean_type_node, cr, ci); | |
1374 | |
1375 stmt = gsi_stmt (*gsi); | |
1376 | |
1377 switch (gimple_code (stmt)) | |
1378 { | |
1379 case GIMPLE_RETURN: | |
1380 type = TREE_TYPE (gimple_return_retval (stmt)); | |
1381 gimple_return_set_retval (stmt, fold_convert (type, cc)); | |
1382 break; | |
1383 | |
1384 case GIMPLE_ASSIGN: | |
1385 type = TREE_TYPE (gimple_assign_lhs (stmt)); | |
1386 gimple_assign_set_rhs_from_tree (gsi, fold_convert (type, cc)); | |
1387 stmt = gsi_stmt (*gsi); | |
1388 break; | |
1389 | |
1390 case GIMPLE_COND: | |
1391 gimple_cond_set_code (stmt, EQ_EXPR); | |
1392 gimple_cond_set_lhs (stmt, cc); | |
1393 gimple_cond_set_rhs (stmt, boolean_true_node); | |
1394 break; | |
1395 | |
1396 default: | |
1397 gcc_unreachable (); | |
1398 } | |
1399 | |
1400 update_stmt (stmt); | |
1401 } | |
1402 | |
1403 | |
1404 /* Process one statement. If we identify a complex operation, expand it. */ | |
1405 | |
1406 static void | |
1407 expand_complex_operations_1 (gimple_stmt_iterator *gsi) | |
1408 { | |
1409 gimple stmt = gsi_stmt (*gsi); | |
1410 tree type, inner_type, lhs; | |
1411 tree ac, ar, ai, bc, br, bi; | |
1412 complex_lattice_t al, bl; | |
1413 enum tree_code code; | |
1414 | |
1415 lhs = gimple_get_lhs (stmt); | |
1416 if (!lhs && gimple_code (stmt) != GIMPLE_COND) | |
1417 return; | |
1418 | |
1419 type = TREE_TYPE (gimple_op (stmt, 0)); | |
1420 code = gimple_expr_code (stmt); | |
1421 | |
1422 /* Initial filter for operations we handle. */ | |
1423 switch (code) | |
1424 { | |
1425 case PLUS_EXPR: | |
1426 case MINUS_EXPR: | |
1427 case MULT_EXPR: | |
1428 case TRUNC_DIV_EXPR: | |
1429 case CEIL_DIV_EXPR: | |
1430 case FLOOR_DIV_EXPR: | |
1431 case ROUND_DIV_EXPR: | |
1432 case RDIV_EXPR: | |
1433 case NEGATE_EXPR: | |
1434 case CONJ_EXPR: | |
1435 if (TREE_CODE (type) != COMPLEX_TYPE) | |
1436 return; | |
1437 inner_type = TREE_TYPE (type); | |
1438 break; | |
1439 | |
1440 case EQ_EXPR: | |
1441 case NE_EXPR: | |
1442 /* Note, both GIMPLE_ASSIGN and GIMPLE_COND may have an EQ_EXPR | |
1443 subocde, so we need to access the operands using gimple_op. */ | |
1444 inner_type = TREE_TYPE (gimple_op (stmt, 1)); | |
1445 if (TREE_CODE (inner_type) != COMPLEX_TYPE) | |
1446 return; | |
1447 break; | |
1448 | |
1449 default: | |
1450 { | |
1451 tree rhs; | |
1452 | |
1453 /* GIMPLE_COND may also fallthru here, but we do not need to | |
1454 do anything with it. */ | |
1455 if (gimple_code (stmt) == GIMPLE_COND) | |
1456 return; | |
1457 | |
1458 if (TREE_CODE (type) == COMPLEX_TYPE) | |
1459 expand_complex_move (gsi, type); | |
1460 else if (is_gimple_assign (stmt) | |
1461 && (gimple_assign_rhs_code (stmt) == REALPART_EXPR | |
1462 || gimple_assign_rhs_code (stmt) == IMAGPART_EXPR) | |
1463 && TREE_CODE (lhs) == SSA_NAME) | |
1464 { | |
1465 rhs = gimple_assign_rhs1 (stmt); | |
1466 rhs = extract_component (gsi, TREE_OPERAND (rhs, 0), | |
1467 gimple_assign_rhs_code (stmt) | |
1468 == IMAGPART_EXPR, | |
1469 false); | |
1470 gimple_assign_set_rhs_from_tree (gsi, rhs); | |
1471 stmt = gsi_stmt (*gsi); | |
1472 update_stmt (stmt); | |
1473 } | |
1474 } | |
1475 return; | |
1476 } | |
1477 | |
1478 /* Extract the components of the two complex values. Make sure and | |
1479 handle the common case of the same value used twice specially. */ | |
1480 if (is_gimple_assign (stmt)) | |
1481 { | |
1482 ac = gimple_assign_rhs1 (stmt); | |
1483 bc = (gimple_num_ops (stmt) > 2) ? gimple_assign_rhs2 (stmt) : NULL; | |
1484 } | |
1485 /* GIMPLE_CALL can not get here. */ | |
1486 else | |
1487 { | |
1488 ac = gimple_cond_lhs (stmt); | |
1489 bc = gimple_cond_rhs (stmt); | |
1490 } | |
1491 | |
1492 ar = extract_component (gsi, ac, false, true); | |
1493 ai = extract_component (gsi, ac, true, true); | |
1494 | |
1495 if (ac == bc) | |
1496 br = ar, bi = ai; | |
1497 else if (bc) | |
1498 { | |
1499 br = extract_component (gsi, bc, 0, true); | |
1500 bi = extract_component (gsi, bc, 1, true); | |
1501 } | |
1502 else | |
1503 br = bi = NULL_TREE; | |
1504 | |
1505 if (gimple_in_ssa_p (cfun)) | |
1506 { | |
1507 al = find_lattice_value (ac); | |
1508 if (al == UNINITIALIZED) | |
1509 al = VARYING; | |
1510 | |
1511 if (TREE_CODE_CLASS (code) == tcc_unary) | |
1512 bl = UNINITIALIZED; | |
1513 else if (ac == bc) | |
1514 bl = al; | |
1515 else | |
1516 { | |
1517 bl = find_lattice_value (bc); | |
1518 if (bl == UNINITIALIZED) | |
1519 bl = VARYING; | |
1520 } | |
1521 } | |
1522 else | |
1523 al = bl = VARYING; | |
1524 | |
1525 switch (code) | |
1526 { | |
1527 case PLUS_EXPR: | |
1528 case MINUS_EXPR: | |
1529 expand_complex_addition (gsi, inner_type, ar, ai, br, bi, code, al, bl); | |
1530 break; | |
1531 | |
1532 case MULT_EXPR: | |
1533 expand_complex_multiplication (gsi, inner_type, ar, ai, br, bi, al, bl); | |
1534 break; | |
1535 | |
1536 case TRUNC_DIV_EXPR: | |
1537 case CEIL_DIV_EXPR: | |
1538 case FLOOR_DIV_EXPR: | |
1539 case ROUND_DIV_EXPR: | |
1540 case RDIV_EXPR: | |
1541 expand_complex_division (gsi, inner_type, ar, ai, br, bi, code, al, bl); | |
1542 break; | |
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1543 |
0 | 1544 case NEGATE_EXPR: |
1545 expand_complex_negation (gsi, inner_type, ar, ai); | |
1546 break; | |
1547 | |
1548 case CONJ_EXPR: | |
1549 expand_complex_conjugate (gsi, inner_type, ar, ai); | |
1550 break; | |
1551 | |
1552 case EQ_EXPR: | |
1553 case NE_EXPR: | |
1554 expand_complex_comparison (gsi, ar, ai, br, bi, code); | |
1555 break; | |
1556 | |
1557 default: | |
1558 gcc_unreachable (); | |
1559 } | |
1560 } | |
1561 | |
1562 | |
1563 /* Entry point for complex operation lowering during optimization. */ | |
1564 | |
1565 static unsigned int | |
1566 tree_lower_complex (void) | |
1567 { | |
1568 int old_last_basic_block; | |
1569 gimple_stmt_iterator gsi; | |
1570 basic_block bb; | |
1571 | |
1572 if (!init_dont_simulate_again ()) | |
1573 return 0; | |
1574 | |
1575 complex_lattice_values = VEC_alloc (complex_lattice_t, heap, num_ssa_names); | |
1576 VEC_safe_grow_cleared (complex_lattice_t, heap, | |
1577 complex_lattice_values, num_ssa_names); | |
1578 | |
1579 init_parameter_lattice_values (); | |
1580 ssa_propagate (complex_visit_stmt, complex_visit_phi); | |
1581 | |
1582 complex_variable_components = htab_create (10, int_tree_map_hash, | |
1583 int_tree_map_eq, free); | |
1584 | |
1585 complex_ssa_name_components = VEC_alloc (tree, heap, 2*num_ssa_names); | |
1586 VEC_safe_grow_cleared (tree, heap, complex_ssa_name_components, | |
1587 2 * num_ssa_names); | |
1588 | |
1589 update_parameter_components (); | |
1590 | |
1591 /* ??? Ideally we'd traverse the blocks in breadth-first order. */ | |
1592 old_last_basic_block = last_basic_block; | |
1593 FOR_EACH_BB (bb) | |
1594 { | |
1595 if (bb->index >= old_last_basic_block) | |
1596 continue; | |
1597 | |
1598 update_phi_components (bb); | |
1599 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
1600 expand_complex_operations_1 (&gsi); | |
1601 } | |
1602 | |
1603 gsi_commit_edge_inserts (); | |
1604 | |
1605 htab_delete (complex_variable_components); | |
1606 VEC_free (tree, heap, complex_ssa_name_components); | |
1607 VEC_free (complex_lattice_t, heap, complex_lattice_values); | |
1608 return 0; | |
1609 } | |
1610 | |
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1611 struct gimple_opt_pass pass_lower_complex = |
0 | 1612 { |
1613 { | |
1614 GIMPLE_PASS, | |
1615 "cplxlower", /* name */ | |
1616 0, /* gate */ | |
1617 tree_lower_complex, /* execute */ | |
1618 NULL, /* sub */ | |
1619 NULL, /* next */ | |
1620 0, /* static_pass_number */ | |
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1621 TV_NONE, /* tv_id */ |
0 | 1622 PROP_ssa, /* properties_required */ |
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1623 PROP_gimple_lcx, /* properties_provided */ |
0 | 1624 0, /* properties_destroyed */ |
1625 0, /* todo_flags_start */ | |
1626 TODO_dump_func | |
1627 | TODO_ggc_collect | |
1628 | TODO_update_ssa | |
1629 | TODO_verify_stmts /* todo_flags_finish */ | |
1630 } | |
1631 }; | |
1632 | |
1633 | |
1634 static bool | |
1635 gate_no_optimization (void) | |
1636 { | |
1637 /* With errors, normal optimization passes are not run. If we don't | |
1638 lower complex operations at all, rtl expansion will abort. */ | |
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1639 return !(cfun->curr_properties & PROP_gimple_lcx); |
0 | 1640 } |
1641 | |
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1642 struct gimple_opt_pass pass_lower_complex_O0 = |
0 | 1643 { |
1644 { | |
1645 GIMPLE_PASS, | |
1646 "cplxlower0", /* name */ | |
1647 gate_no_optimization, /* gate */ | |
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1648 tree_lower_complex, /* execute */ |
0 | 1649 NULL, /* sub */ |
1650 NULL, /* next */ | |
1651 0, /* static_pass_number */ | |
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1652 TV_NONE, /* tv_id */ |
0 | 1653 PROP_cfg, /* properties_required */ |
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1654 PROP_gimple_lcx, /* properties_provided */ |
0 | 1655 0, /* properties_destroyed */ |
1656 0, /* todo_flags_start */ | |
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1657 TODO_dump_func |
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1658 | TODO_ggc_collect |
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1659 | TODO_update_ssa |
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1660 | TODO_verify_stmts /* todo_flags_finish */ |
0 | 1661 } |
1662 }; |