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2b725155 | 1 | /* Lower complex number operations to scalar operations. |
c75c517d | 2 | Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
7072a650 | 3 | Free Software Foundation, Inc. |
6de9cd9a DN |
4 | |
5 | This file is part of GCC. | |
b8698a0f | 6 | |
6de9cd9a DN |
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 | |
9dcd6f09 | 9 | Free Software Foundation; either version 3, or (at your option) any |
6de9cd9a | 10 | later version. |
b8698a0f | 11 | |
6de9cd9a DN |
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. | |
b8698a0f | 16 | |
6de9cd9a | 17 | You should have received a copy of the GNU General Public License |
9dcd6f09 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a DN |
20 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
6de9cd9a | 24 | #include "tm.h" |
e41d82f5 | 25 | #include "tree.h" |
e41d82f5 | 26 | #include "flags.h" |
6de9cd9a | 27 | #include "tree-flow.h" |
726a989a | 28 | #include "gimple.h" |
6de9cd9a DN |
29 | #include "tree-iterator.h" |
30 | #include "tree-pass.h" | |
e41d82f5 RH |
31 | #include "tree-ssa-propagate.h" |
32 | ||
33 | ||
34 | /* For each complex ssa name, a lattice value. We're interested in finding | |
35 | out whether a complex number is degenerate in some way, having only real | |
36 | or only complex parts. */ | |
37 | ||
32e8bb8e | 38 | enum |
e41d82f5 RH |
39 | { |
40 | UNINITIALIZED = 0, | |
41 | ONLY_REAL = 1, | |
42 | ONLY_IMAG = 2, | |
43 | VARYING = 3 | |
32e8bb8e ILT |
44 | }; |
45 | ||
46 | /* The type complex_lattice_t holds combinations of the above | |
47 | constants. */ | |
48 | typedef int complex_lattice_t; | |
e41d82f5 RH |
49 | |
50 | #define PAIR(a, b) ((a) << 2 | (b)) | |
51 | ||
52 | DEF_VEC_I(complex_lattice_t); | |
53 | DEF_VEC_ALLOC_I(complex_lattice_t, heap); | |
54 | ||
55 | static VEC(complex_lattice_t, heap) *complex_lattice_values; | |
56 | ||
a3648cfc DB |
57 | /* For each complex variable, a pair of variables for the components exists in |
58 | the hashtable. */ | |
59 | static htab_t complex_variable_components; | |
60 | ||
95a8c155 RH |
61 | /* For each complex SSA_NAME, a pair of ssa names for the components. */ |
62 | static VEC(tree, heap) *complex_ssa_name_components; | |
63 | ||
a3648cfc DB |
64 | /* Lookup UID in the complex_variable_components hashtable and return the |
65 | associated tree. */ | |
b8698a0f | 66 | static tree |
a3648cfc DB |
67 | cvc_lookup (unsigned int uid) |
68 | { | |
69 | struct int_tree_map *h, in; | |
70 | in.uid = uid; | |
3d9a9f94 | 71 | h = (struct int_tree_map *) htab_find_with_hash (complex_variable_components, &in, uid); |
95a8c155 | 72 | return h ? h->to : NULL; |
a3648cfc | 73 | } |
b8698a0f | 74 | |
a3648cfc DB |
75 | /* Insert the pair UID, TO into the complex_variable_components hashtable. */ |
76 | ||
b8698a0f | 77 | static void |
a3648cfc | 78 | cvc_insert (unsigned int uid, tree to) |
b8698a0f | 79 | { |
a3648cfc DB |
80 | struct int_tree_map *h; |
81 | void **loc; | |
82 | ||
5ed6ace5 | 83 | h = XNEW (struct int_tree_map); |
a3648cfc DB |
84 | h->uid = uid; |
85 | h->to = to; | |
86 | loc = htab_find_slot_with_hash (complex_variable_components, h, | |
87 | uid, INSERT); | |
95a8c155 | 88 | *(struct int_tree_map **) loc = h; |
a3648cfc | 89 | } |
e41d82f5 | 90 | |
e41d82f5 RH |
91 | /* Return true if T is not a zero constant. In the case of real values, |
92 | we're only interested in +0.0. */ | |
93 | ||
94 | static int | |
95 | some_nonzerop (tree t) | |
96 | { | |
97 | int zerop = false; | |
98 | ||
2ca862e9 JM |
99 | /* Operations with real or imaginary part of a complex number zero |
100 | cannot be treated the same as operations with a real or imaginary | |
101 | operand if we care about the signs of zeros in the result. */ | |
102 | if (TREE_CODE (t) == REAL_CST && !flag_signed_zeros) | |
e41d82f5 | 103 | zerop = REAL_VALUES_IDENTICAL (TREE_REAL_CST (t), dconst0); |
325217ed CF |
104 | else if (TREE_CODE (t) == FIXED_CST) |
105 | zerop = fixed_zerop (t); | |
e41d82f5 RH |
106 | else if (TREE_CODE (t) == INTEGER_CST) |
107 | zerop = integer_zerop (t); | |
108 | ||
109 | return !zerop; | |
110 | } | |
111 | ||
726a989a RB |
112 | |
113 | /* Compute a lattice value from the components of a complex type REAL | |
114 | and IMAG. */ | |
6de9cd9a | 115 | |
e41d82f5 | 116 | static complex_lattice_t |
726a989a | 117 | find_lattice_value_parts (tree real, tree imag) |
e41d82f5 | 118 | { |
e41d82f5 RH |
119 | int r, i; |
120 | complex_lattice_t ret; | |
121 | ||
726a989a RB |
122 | r = some_nonzerop (real); |
123 | i = some_nonzerop (imag); | |
124 | ret = r * ONLY_REAL + i * ONLY_IMAG; | |
125 | ||
126 | /* ??? On occasion we could do better than mapping 0+0i to real, but we | |
127 | certainly don't want to leave it UNINITIALIZED, which eventually gets | |
128 | mapped to VARYING. */ | |
129 | if (ret == UNINITIALIZED) | |
130 | ret = ONLY_REAL; | |
131 | ||
132 | return ret; | |
133 | } | |
134 | ||
135 | ||
136 | /* Compute a lattice value from gimple_val T. */ | |
137 | ||
138 | static complex_lattice_t | |
139 | find_lattice_value (tree t) | |
140 | { | |
141 | tree real, imag; | |
142 | ||
e41d82f5 RH |
143 | switch (TREE_CODE (t)) |
144 | { | |
145 | case SSA_NAME: | |
146 | return VEC_index (complex_lattice_t, complex_lattice_values, | |
147 | SSA_NAME_VERSION (t)); | |
148 | ||
149 | case COMPLEX_CST: | |
150 | real = TREE_REALPART (t); | |
151 | imag = TREE_IMAGPART (t); | |
152 | break; | |
153 | ||
e41d82f5 RH |
154 | default: |
155 | gcc_unreachable (); | |
156 | } | |
157 | ||
726a989a | 158 | return find_lattice_value_parts (real, imag); |
e41d82f5 RH |
159 | } |
160 | ||
161 | /* Determine if LHS is something for which we're interested in seeing | |
162 | simulation results. */ | |
163 | ||
164 | static bool | |
165 | is_complex_reg (tree lhs) | |
166 | { | |
167 | return TREE_CODE (TREE_TYPE (lhs)) == COMPLEX_TYPE && is_gimple_reg (lhs); | |
168 | } | |
169 | ||
170 | /* Mark the incoming parameters to the function as VARYING. */ | |
171 | ||
172 | static void | |
173 | init_parameter_lattice_values (void) | |
174 | { | |
f0a77246 | 175 | tree parm, ssa_name; |
e41d82f5 | 176 | |
910ad8de | 177 | for (parm = DECL_ARGUMENTS (cfun->decl); parm ; parm = DECL_CHAIN (parm)) |
f0a77246 | 178 | if (is_complex_reg (parm) |
32244553 | 179 | && (ssa_name = ssa_default_def (cfun, parm)) != NULL_TREE) |
f0a77246 RG |
180 | VEC_replace (complex_lattice_t, complex_lattice_values, |
181 | SSA_NAME_VERSION (ssa_name), VARYING); | |
e41d82f5 RH |
182 | } |
183 | ||
726a989a RB |
184 | /* Initialize simulation state for each statement. Return false if we |
185 | found no statements we want to simulate, and thus there's nothing | |
186 | for the entire pass to do. */ | |
e41d82f5 RH |
187 | |
188 | static bool | |
189 | init_dont_simulate_again (void) | |
190 | { | |
191 | basic_block bb; | |
726a989a RB |
192 | gimple_stmt_iterator gsi; |
193 | gimple phi; | |
8f8abce4 | 194 | bool saw_a_complex_op = false; |
e41d82f5 RH |
195 | |
196 | FOR_EACH_BB (bb) | |
197 | { | |
726a989a RB |
198 | for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
199 | { | |
200 | phi = gsi_stmt (gsi); | |
201 | prop_set_simulate_again (phi, | |
202 | is_complex_reg (gimple_phi_result (phi))); | |
203 | } | |
e41d82f5 | 204 | |
726a989a | 205 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
e41d82f5 | 206 | { |
726a989a RB |
207 | gimple stmt; |
208 | tree op0, op1; | |
209 | bool sim_again_p; | |
e41d82f5 | 210 | |
726a989a RB |
211 | stmt = gsi_stmt (gsi); |
212 | op0 = op1 = NULL_TREE; | |
99e6bdda | 213 | |
b8698a0f | 214 | /* Most control-altering statements must be initially |
99e6bdda | 215 | simulated, else we won't cover the entire cfg. */ |
726a989a | 216 | sim_again_p = stmt_ends_bb_p (stmt); |
99e6bdda | 217 | |
726a989a | 218 | switch (gimple_code (stmt)) |
e41d82f5 | 219 | { |
726a989a RB |
220 | case GIMPLE_CALL: |
221 | if (gimple_call_lhs (stmt)) | |
222 | sim_again_p = is_complex_reg (gimple_call_lhs (stmt)); | |
223 | break; | |
8f8abce4 | 224 | |
726a989a RB |
225 | case GIMPLE_ASSIGN: |
226 | sim_again_p = is_complex_reg (gimple_assign_lhs (stmt)); | |
227 | if (gimple_assign_rhs_code (stmt) == REALPART_EXPR | |
228 | || gimple_assign_rhs_code (stmt) == IMAGPART_EXPR) | |
229 | op0 = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0); | |
230 | else | |
231 | op0 = gimple_assign_rhs1 (stmt); | |
232 | if (gimple_num_ops (stmt) > 2) | |
233 | op1 = gimple_assign_rhs2 (stmt); | |
8f8abce4 RH |
234 | break; |
235 | ||
726a989a RB |
236 | case GIMPLE_COND: |
237 | op0 = gimple_cond_lhs (stmt); | |
238 | op1 = gimple_cond_rhs (stmt); | |
8f8abce4 RH |
239 | break; |
240 | ||
241 | default: | |
242 | break; | |
e41d82f5 RH |
243 | } |
244 | ||
726a989a RB |
245 | if (op0 || op1) |
246 | switch (gimple_expr_code (stmt)) | |
8f8abce4 RH |
247 | { |
248 | case EQ_EXPR: | |
249 | case NE_EXPR: | |
8f8abce4 RH |
250 | case PLUS_EXPR: |
251 | case MINUS_EXPR: | |
252 | case MULT_EXPR: | |
253 | case TRUNC_DIV_EXPR: | |
254 | case CEIL_DIV_EXPR: | |
255 | case FLOOR_DIV_EXPR: | |
256 | case ROUND_DIV_EXPR: | |
257 | case RDIV_EXPR: | |
726a989a RB |
258 | if (TREE_CODE (TREE_TYPE (op0)) == COMPLEX_TYPE |
259 | || TREE_CODE (TREE_TYPE (op1)) == COMPLEX_TYPE) | |
260 | saw_a_complex_op = true; | |
261 | break; | |
262 | ||
8f8abce4 RH |
263 | case NEGATE_EXPR: |
264 | case CONJ_EXPR: | |
726a989a | 265 | if (TREE_CODE (TREE_TYPE (op0)) == COMPLEX_TYPE) |
8f8abce4 RH |
266 | saw_a_complex_op = true; |
267 | break; | |
268 | ||
7b7e6ecd EB |
269 | case REALPART_EXPR: |
270 | case IMAGPART_EXPR: | |
271 | /* The total store transformation performed during | |
726a989a RB |
272 | gimplification creates such uninitialized loads |
273 | and we need to lower the statement to be able | |
274 | to fix things up. */ | |
275 | if (TREE_CODE (op0) == SSA_NAME | |
276 | && ssa_undefined_value_p (op0)) | |
7b7e6ecd EB |
277 | saw_a_complex_op = true; |
278 | break; | |
279 | ||
8f8abce4 RH |
280 | default: |
281 | break; | |
282 | } | |
283 | ||
726a989a | 284 | prop_set_simulate_again (stmt, sim_again_p); |
e41d82f5 RH |
285 | } |
286 | } | |
287 | ||
8f8abce4 | 288 | return saw_a_complex_op; |
e41d82f5 RH |
289 | } |
290 | ||
291 | ||
292 | /* Evaluate statement STMT against the complex lattice defined above. */ | |
293 | ||
294 | static enum ssa_prop_result | |
726a989a | 295 | complex_visit_stmt (gimple stmt, edge *taken_edge_p ATTRIBUTE_UNUSED, |
e41d82f5 RH |
296 | tree *result_p) |
297 | { | |
298 | complex_lattice_t new_l, old_l, op1_l, op2_l; | |
299 | unsigned int ver; | |
726a989a | 300 | tree lhs; |
e41d82f5 | 301 | |
726a989a RB |
302 | lhs = gimple_get_lhs (stmt); |
303 | /* Skip anything but GIMPLE_ASSIGN and GIMPLE_CALL with a lhs. */ | |
304 | if (!lhs) | |
99e6bdda | 305 | return SSA_PROP_VARYING; |
e41d82f5 | 306 | |
99e6bdda RH |
307 | /* These conditions should be satisfied due to the initial filter |
308 | set up in init_dont_simulate_again. */ | |
e41d82f5 RH |
309 | gcc_assert (TREE_CODE (lhs) == SSA_NAME); |
310 | gcc_assert (TREE_CODE (TREE_TYPE (lhs)) == COMPLEX_TYPE); | |
311 | ||
312 | *result_p = lhs; | |
313 | ver = SSA_NAME_VERSION (lhs); | |
314 | old_l = VEC_index (complex_lattice_t, complex_lattice_values, ver); | |
315 | ||
726a989a | 316 | switch (gimple_expr_code (stmt)) |
e41d82f5 RH |
317 | { |
318 | case SSA_NAME: | |
e41d82f5 | 319 | case COMPLEX_CST: |
726a989a RB |
320 | new_l = find_lattice_value (gimple_assign_rhs1 (stmt)); |
321 | break; | |
322 | ||
323 | case COMPLEX_EXPR: | |
324 | new_l = find_lattice_value_parts (gimple_assign_rhs1 (stmt), | |
325 | gimple_assign_rhs2 (stmt)); | |
e41d82f5 RH |
326 | break; |
327 | ||
328 | case PLUS_EXPR: | |
329 | case MINUS_EXPR: | |
726a989a RB |
330 | op1_l = find_lattice_value (gimple_assign_rhs1 (stmt)); |
331 | op2_l = find_lattice_value (gimple_assign_rhs2 (stmt)); | |
e41d82f5 RH |
332 | |
333 | /* We've set up the lattice values such that IOR neatly | |
334 | models addition. */ | |
335 | new_l = op1_l | op2_l; | |
336 | break; | |
337 | ||
338 | case MULT_EXPR: | |
339 | case RDIV_EXPR: | |
340 | case TRUNC_DIV_EXPR: | |
341 | case CEIL_DIV_EXPR: | |
342 | case FLOOR_DIV_EXPR: | |
343 | case ROUND_DIV_EXPR: | |
726a989a RB |
344 | op1_l = find_lattice_value (gimple_assign_rhs1 (stmt)); |
345 | op2_l = find_lattice_value (gimple_assign_rhs2 (stmt)); | |
e41d82f5 RH |
346 | |
347 | /* Obviously, if either varies, so does the result. */ | |
348 | if (op1_l == VARYING || op2_l == VARYING) | |
349 | new_l = VARYING; | |
350 | /* Don't prematurely promote variables if we've not yet seen | |
351 | their inputs. */ | |
352 | else if (op1_l == UNINITIALIZED) | |
353 | new_l = op2_l; | |
354 | else if (op2_l == UNINITIALIZED) | |
355 | new_l = op1_l; | |
356 | else | |
357 | { | |
358 | /* At this point both numbers have only one component. If the | |
359 | numbers are of opposite kind, the result is imaginary, | |
360 | otherwise the result is real. The add/subtract translates | |
361 | the real/imag from/to 0/1; the ^ performs the comparison. */ | |
362 | new_l = ((op1_l - ONLY_REAL) ^ (op2_l - ONLY_REAL)) + ONLY_REAL; | |
363 | ||
364 | /* Don't allow the lattice value to flip-flop indefinitely. */ | |
365 | new_l |= old_l; | |
366 | } | |
367 | break; | |
368 | ||
369 | case NEGATE_EXPR: | |
370 | case CONJ_EXPR: | |
726a989a | 371 | new_l = find_lattice_value (gimple_assign_rhs1 (stmt)); |
e41d82f5 RH |
372 | break; |
373 | ||
374 | default: | |
375 | new_l = VARYING; | |
376 | break; | |
377 | } | |
378 | ||
379 | /* If nothing changed this round, let the propagator know. */ | |
380 | if (new_l == old_l) | |
381 | return SSA_PROP_NOT_INTERESTING; | |
382 | ||
383 | VEC_replace (complex_lattice_t, complex_lattice_values, ver, new_l); | |
384 | return new_l == VARYING ? SSA_PROP_VARYING : SSA_PROP_INTERESTING; | |
385 | } | |
386 | ||
387 | /* Evaluate a PHI node against the complex lattice defined above. */ | |
388 | ||
389 | static enum ssa_prop_result | |
726a989a | 390 | complex_visit_phi (gimple phi) |
e41d82f5 RH |
391 | { |
392 | complex_lattice_t new_l, old_l; | |
393 | unsigned int ver; | |
394 | tree lhs; | |
395 | int i; | |
396 | ||
726a989a | 397 | lhs = gimple_phi_result (phi); |
e41d82f5 RH |
398 | |
399 | /* This condition should be satisfied due to the initial filter | |
400 | set up in init_dont_simulate_again. */ | |
401 | gcc_assert (TREE_CODE (TREE_TYPE (lhs)) == COMPLEX_TYPE); | |
402 | ||
403 | /* We've set up the lattice values such that IOR neatly models PHI meet. */ | |
404 | new_l = UNINITIALIZED; | |
726a989a RB |
405 | for (i = gimple_phi_num_args (phi) - 1; i >= 0; --i) |
406 | new_l |= find_lattice_value (gimple_phi_arg_def (phi, i)); | |
e41d82f5 RH |
407 | |
408 | ver = SSA_NAME_VERSION (lhs); | |
409 | old_l = VEC_index (complex_lattice_t, complex_lattice_values, ver); | |
410 | ||
411 | if (new_l == old_l) | |
412 | return SSA_PROP_NOT_INTERESTING; | |
413 | ||
414 | VEC_replace (complex_lattice_t, complex_lattice_values, ver, new_l); | |
415 | return new_l == VARYING ? SSA_PROP_VARYING : SSA_PROP_INTERESTING; | |
416 | } | |
417 | ||
95a8c155 | 418 | /* Create one backing variable for a complex component of ORIG. */ |
e41d82f5 | 419 | |
95a8c155 RH |
420 | static tree |
421 | create_one_component_var (tree type, tree orig, const char *prefix, | |
422 | const char *suffix, enum tree_code code) | |
e41d82f5 | 423 | { |
95a8c155 | 424 | tree r = create_tmp_var (type, prefix); |
e41d82f5 | 425 | |
95a8c155 RH |
426 | DECL_SOURCE_LOCATION (r) = DECL_SOURCE_LOCATION (orig); |
427 | DECL_ARTIFICIAL (r) = 1; | |
8f8abce4 | 428 | |
95a8c155 RH |
429 | if (DECL_NAME (orig) && !DECL_IGNORED_P (orig)) |
430 | { | |
431 | const char *name = IDENTIFIER_POINTER (DECL_NAME (orig)); | |
95a8c155 RH |
432 | |
433 | DECL_NAME (r) = get_identifier (ACONCAT ((name, suffix, NULL))); | |
e41d82f5 | 434 | |
95a8c155 RH |
435 | SET_DECL_DEBUG_EXPR (r, build1 (code, type, orig)); |
436 | DECL_DEBUG_EXPR_IS_FROM (r) = 1; | |
437 | DECL_IGNORED_P (r) = 0; | |
438 | TREE_NO_WARNING (r) = TREE_NO_WARNING (orig); | |
439 | } | |
440 | else | |
e41d82f5 | 441 | { |
95a8c155 RH |
442 | DECL_IGNORED_P (r) = 1; |
443 | TREE_NO_WARNING (r) = 1; | |
444 | } | |
e41d82f5 | 445 | |
95a8c155 RH |
446 | return r; |
447 | } | |
e41d82f5 | 448 | |
95a8c155 | 449 | /* Retrieve a value for a complex component of VAR. */ |
e41d82f5 | 450 | |
95a8c155 RH |
451 | static tree |
452 | get_component_var (tree var, bool imag_p) | |
453 | { | |
454 | size_t decl_index = DECL_UID (var) * 2 + imag_p; | |
455 | tree ret = cvc_lookup (decl_index); | |
456 | ||
457 | if (ret == NULL) | |
458 | { | |
459 | ret = create_one_component_var (TREE_TYPE (TREE_TYPE (var)), var, | |
460 | imag_p ? "CI" : "CR", | |
461 | imag_p ? "$imag" : "$real", | |
462 | imag_p ? IMAGPART_EXPR : REALPART_EXPR); | |
463 | cvc_insert (decl_index, ret); | |
464 | } | |
465 | ||
466 | return ret; | |
467 | } | |
e41d82f5 | 468 | |
95a8c155 | 469 | /* Retrieve a value for a complex component of SSA_NAME. */ |
e41d82f5 | 470 | |
95a8c155 RH |
471 | static tree |
472 | get_component_ssa_name (tree ssa_name, bool imag_p) | |
473 | { | |
474 | complex_lattice_t lattice = find_lattice_value (ssa_name); | |
475 | size_t ssa_name_index; | |
476 | tree ret; | |
e41d82f5 | 477 | |
95a8c155 RH |
478 | if (lattice == (imag_p ? ONLY_REAL : ONLY_IMAG)) |
479 | { | |
480 | tree inner_type = TREE_TYPE (TREE_TYPE (ssa_name)); | |
481 | if (SCALAR_FLOAT_TYPE_P (inner_type)) | |
482 | return build_real (inner_type, dconst0); | |
483 | else | |
484 | return build_int_cst (inner_type, 0); | |
485 | } | |
e41d82f5 | 486 | |
95a8c155 RH |
487 | ssa_name_index = SSA_NAME_VERSION (ssa_name) * 2 + imag_p; |
488 | ret = VEC_index (tree, complex_ssa_name_components, ssa_name_index); | |
489 | if (ret == NULL) | |
490 | { | |
491 | ret = get_component_var (SSA_NAME_VAR (ssa_name), imag_p); | |
492 | ret = make_ssa_name (ret, NULL); | |
493 | ||
494 | /* Copy some properties from the original. In particular, whether it | |
495 | is used in an abnormal phi, and whether it's uninitialized. */ | |
496 | SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ret) | |
497 | = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name); | |
498 | if (TREE_CODE (SSA_NAME_VAR (ssa_name)) == VAR_DECL | |
32244553 | 499 | && SSA_NAME_IS_DEFAULT_DEF (ssa_name)) |
95a8c155 RH |
500 | { |
501 | SSA_NAME_DEF_STMT (ret) = SSA_NAME_DEF_STMT (ssa_name); | |
32244553 | 502 | set_ssa_default_def (cfun, SSA_NAME_VAR (ret), ret); |
e41d82f5 RH |
503 | } |
504 | ||
95a8c155 | 505 | VEC_replace (tree, complex_ssa_name_components, ssa_name_index, ret); |
e41d82f5 | 506 | } |
95a8c155 RH |
507 | |
508 | return ret; | |
509 | } | |
510 | ||
726a989a RB |
511 | /* Set a value for a complex component of SSA_NAME, return a |
512 | gimple_seq of stuff that needs doing. */ | |
95a8c155 | 513 | |
726a989a | 514 | static gimple_seq |
95a8c155 RH |
515 | set_component_ssa_name (tree ssa_name, bool imag_p, tree value) |
516 | { | |
517 | complex_lattice_t lattice = find_lattice_value (ssa_name); | |
518 | size_t ssa_name_index; | |
726a989a RB |
519 | tree comp; |
520 | gimple last; | |
521 | gimple_seq list; | |
95a8c155 RH |
522 | |
523 | /* We know the value must be zero, else there's a bug in our lattice | |
524 | analysis. But the value may well be a variable known to contain | |
525 | zero. We should be safe ignoring it. */ | |
526 | if (lattice == (imag_p ? ONLY_REAL : ONLY_IMAG)) | |
527 | return NULL; | |
528 | ||
529 | /* If we've already assigned an SSA_NAME to this component, then this | |
530 | means that our walk of the basic blocks found a use before the set. | |
531 | This is fine. Now we should create an initialization for the value | |
532 | we created earlier. */ | |
533 | ssa_name_index = SSA_NAME_VERSION (ssa_name) * 2 + imag_p; | |
534 | comp = VEC_index (tree, complex_ssa_name_components, ssa_name_index); | |
535 | if (comp) | |
536 | ; | |
537 | ||
538 | /* If we've nothing assigned, and the value we're given is already stable, | |
536fa7b7 | 539 | then install that as the value for this SSA_NAME. This preemptively |
95a8c155 | 540 | copy-propagates the value, which avoids unnecessary memory allocation. */ |
35a45bd4 RH |
541 | else if (is_gimple_min_invariant (value) |
542 | && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name)) | |
95a8c155 RH |
543 | { |
544 | VEC_replace (tree, complex_ssa_name_components, ssa_name_index, value); | |
545 | return NULL; | |
546 | } | |
547 | else if (TREE_CODE (value) == SSA_NAME | |
548 | && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (ssa_name)) | |
549 | { | |
550 | /* Replace an anonymous base value with the variable from cvc_lookup. | |
551 | This should result in better debug info. */ | |
552 | if (DECL_IGNORED_P (SSA_NAME_VAR (value)) | |
553 | && !DECL_IGNORED_P (SSA_NAME_VAR (ssa_name))) | |
554 | { | |
555 | comp = get_component_var (SSA_NAME_VAR (ssa_name), imag_p); | |
db753fa1 | 556 | replace_ssa_name_symbol (value, comp); |
95a8c155 RH |
557 | } |
558 | ||
559 | VEC_replace (tree, complex_ssa_name_components, ssa_name_index, value); | |
560 | return NULL; | |
561 | } | |
562 | ||
563 | /* Finally, we need to stabilize the result by installing the value into | |
564 | a new ssa name. */ | |
565 | else | |
566 | comp = get_component_ssa_name (ssa_name, imag_p); | |
b8698a0f | 567 | |
95a8c155 | 568 | /* Do all the work to assign VALUE to COMP. */ |
726a989a | 569 | list = NULL; |
95a8c155 | 570 | value = force_gimple_operand (value, &list, false, NULL); |
726a989a RB |
571 | last = gimple_build_assign (comp, value); |
572 | gimple_seq_add_stmt (&list, last); | |
573 | gcc_assert (SSA_NAME_DEF_STMT (comp) == last); | |
95a8c155 RH |
574 | |
575 | return list; | |
e41d82f5 | 576 | } |
6de9cd9a | 577 | |
6de9cd9a DN |
578 | /* Extract the real or imaginary part of a complex variable or constant. |
579 | Make sure that it's a proper gimple_val and gimplify it if not. | |
726a989a | 580 | Emit any new code before gsi. */ |
6de9cd9a DN |
581 | |
582 | static tree | |
726a989a | 583 | extract_component (gimple_stmt_iterator *gsi, tree t, bool imagpart_p, |
e41d82f5 | 584 | bool gimple_p) |
6de9cd9a | 585 | { |
6de9cd9a DN |
586 | switch (TREE_CODE (t)) |
587 | { | |
588 | case COMPLEX_CST: | |
e41d82f5 | 589 | return imagpart_p ? TREE_IMAGPART (t) : TREE_REALPART (t); |
6de9cd9a DN |
590 | |
591 | case COMPLEX_EXPR: | |
726a989a | 592 | gcc_unreachable (); |
6de9cd9a DN |
593 | |
594 | case VAR_DECL: | |
f35a986c | 595 | case RESULT_DECL: |
6de9cd9a | 596 | case PARM_DECL: |
e41d82f5 RH |
597 | case COMPONENT_REF: |
598 | case ARRAY_REF: | |
7ec49257 | 599 | case VIEW_CONVERT_EXPR: |
70f34814 | 600 | case MEM_REF: |
e41d82f5 RH |
601 | { |
602 | tree inner_type = TREE_TYPE (TREE_TYPE (t)); | |
603 | ||
604 | t = build1 ((imagpart_p ? IMAGPART_EXPR : REALPART_EXPR), | |
605 | inner_type, unshare_expr (t)); | |
606 | ||
607 | if (gimple_p) | |
726a989a RB |
608 | t = force_gimple_operand_gsi (gsi, t, true, NULL, true, |
609 | GSI_SAME_STMT); | |
e41d82f5 RH |
610 | |
611 | return t; | |
612 | } | |
613 | ||
614 | case SSA_NAME: | |
95a8c155 | 615 | return get_component_ssa_name (t, imagpart_p); |
6de9cd9a DN |
616 | |
617 | default: | |
1e128c5f | 618 | gcc_unreachable (); |
6de9cd9a | 619 | } |
e41d82f5 RH |
620 | } |
621 | ||
622 | /* Update the complex components of the ssa name on the lhs of STMT. */ | |
6de9cd9a | 623 | |
e41d82f5 | 624 | static void |
726a989a RB |
625 | update_complex_components (gimple_stmt_iterator *gsi, gimple stmt, tree r, |
626 | tree i) | |
e41d82f5 | 627 | { |
726a989a RB |
628 | tree lhs; |
629 | gimple_seq list; | |
630 | ||
631 | lhs = gimple_get_lhs (stmt); | |
95a8c155 RH |
632 | |
633 | list = set_component_ssa_name (lhs, false, r); | |
634 | if (list) | |
726a989a | 635 | gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING); |
95a8c155 RH |
636 | |
637 | list = set_component_ssa_name (lhs, true, i); | |
638 | if (list) | |
726a989a | 639 | gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING); |
6de9cd9a DN |
640 | } |
641 | ||
5d6b3bba | 642 | static void |
95a8c155 | 643 | update_complex_components_on_edge (edge e, tree lhs, tree r, tree i) |
5d6b3bba | 644 | { |
726a989a | 645 | gimple_seq list; |
5d6b3bba | 646 | |
95a8c155 RH |
647 | list = set_component_ssa_name (lhs, false, r); |
648 | if (list) | |
726a989a | 649 | gsi_insert_seq_on_edge (e, list); |
5d6b3bba | 650 | |
95a8c155 RH |
651 | list = set_component_ssa_name (lhs, true, i); |
652 | if (list) | |
726a989a | 653 | gsi_insert_seq_on_edge (e, list); |
5d6b3bba RH |
654 | } |
655 | ||
726a989a | 656 | |
6de9cd9a DN |
657 | /* Update an assignment to a complex variable in place. */ |
658 | ||
659 | static void | |
726a989a | 660 | update_complex_assignment (gimple_stmt_iterator *gsi, tree r, tree i) |
6de9cd9a | 661 | { |
f5e5b46c | 662 | gimple stmt; |
726a989a | 663 | |
355a7673 MM |
664 | gimple_assign_set_rhs_with_ops (gsi, COMPLEX_EXPR, r, i); |
665 | stmt = gsi_stmt (*gsi); | |
f5e5b46c RG |
666 | update_stmt (stmt); |
667 | if (maybe_clean_eh_stmt (stmt)) | |
668 | gimple_purge_dead_eh_edges (gimple_bb (stmt)); | |
355a7673 MM |
669 | |
670 | if (gimple_in_ssa_p (cfun)) | |
671 | update_complex_components (gsi, gsi_stmt (*gsi), r, i); | |
e41d82f5 RH |
672 | } |
673 | ||
726a989a | 674 | |
e41d82f5 RH |
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 | ||
910ad8de | 684 | for (parm = DECL_ARGUMENTS (cfun->decl); parm ; parm = DECL_CHAIN (parm)) |
e41d82f5 RH |
685 | { |
686 | tree type = TREE_TYPE (parm); | |
5d6b3bba | 687 | tree ssa_name, r, i; |
e41d82f5 RH |
688 | |
689 | if (TREE_CODE (type) != COMPLEX_TYPE || !is_gimple_reg (parm)) | |
690 | continue; | |
691 | ||
692 | type = TREE_TYPE (type); | |
32244553 | 693 | ssa_name = ssa_default_def (cfun, parm); |
c0a3f887 RG |
694 | if (!ssa_name) |
695 | continue; | |
e41d82f5 | 696 | |
5d6b3bba RH |
697 | r = build1 (REALPART_EXPR, type, ssa_name); |
698 | i = build1 (IMAGPART_EXPR, type, ssa_name); | |
95a8c155 | 699 | update_complex_components_on_edge (entry_edge, ssa_name, r, i); |
e41d82f5 RH |
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 | { | |
726a989a | 709 | gimple_stmt_iterator gsi; |
e41d82f5 | 710 | |
726a989a RB |
711 | for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
712 | { | |
713 | gimple phi = gsi_stmt (gsi); | |
e41d82f5 | 714 | |
726a989a RB |
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; | |
95a8c155 | 720 | |
726a989a RB |
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 | } | |
e41d82f5 RH |
751 | } |
752 | ||
e41d82f5 RH |
753 | /* Expand a complex move to scalars. */ |
754 | ||
755 | static void | |
726a989a | 756 | expand_complex_move (gimple_stmt_iterator *gsi, tree type) |
e41d82f5 RH |
757 | { |
758 | tree inner_type = TREE_TYPE (type); | |
726a989a RB |
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 (); | |
e41d82f5 RH |
777 | |
778 | if (TREE_CODE (lhs) == SSA_NAME) | |
779 | { | |
726a989a | 780 | if (is_ctrl_altering_stmt (stmt)) |
5d6b3bba | 781 | { |
5d6b3bba RH |
782 | edge e; |
783 | ||
784 | /* The value is not assigned on the exception edges, so we need not | |
785 | concern ourselves there. We do need to update on the fallthru | |
786 | edge. Find it. */ | |
0fd4b31d NF |
787 | e = find_fallthru_edge (gsi_bb (*gsi)->succs); |
788 | if (!e) | |
789 | gcc_unreachable (); | |
5d6b3bba RH |
790 | |
791 | r = build1 (REALPART_EXPR, inner_type, lhs); | |
792 | i = build1 (IMAGPART_EXPR, inner_type, lhs); | |
95a8c155 | 793 | update_complex_components_on_edge (e, lhs, r, i); |
5d6b3bba | 794 | } |
726a989a RB |
795 | else if (is_gimple_call (stmt) |
796 | || gimple_has_side_effects (stmt) | |
797 | || gimple_assign_rhs_code (stmt) == PAREN_EXPR) | |
e41d82f5 | 798 | { |
5d6b3bba RH |
799 | r = build1 (REALPART_EXPR, inner_type, lhs); |
800 | i = build1 (IMAGPART_EXPR, inner_type, lhs); | |
726a989a | 801 | update_complex_components (gsi, stmt, r, i); |
e41d82f5 RH |
802 | } |
803 | else | |
804 | { | |
726a989a RB |
805 | if (gimple_assign_rhs_code (stmt) != COMPLEX_EXPR) |
806 | { | |
807 | r = extract_component (gsi, rhs, 0, true); | |
808 | i = extract_component (gsi, rhs, 1, true); | |
809 | } | |
810 | else | |
811 | { | |
812 | r = gimple_assign_rhs1 (stmt); | |
813 | i = gimple_assign_rhs2 (stmt); | |
814 | } | |
815 | update_complex_assignment (gsi, r, i); | |
e41d82f5 RH |
816 | } |
817 | } | |
726a989a | 818 | else if (rhs && TREE_CODE (rhs) == SSA_NAME && !TREE_SIDE_EFFECTS (lhs)) |
e41d82f5 RH |
819 | { |
820 | tree x; | |
726a989a | 821 | gimple t; |
e41d82f5 | 822 | |
726a989a RB |
823 | r = extract_component (gsi, rhs, 0, false); |
824 | i = extract_component (gsi, rhs, 1, false); | |
e41d82f5 RH |
825 | |
826 | x = build1 (REALPART_EXPR, inner_type, unshare_expr (lhs)); | |
726a989a RB |
827 | t = gimple_build_assign (x, r); |
828 | gsi_insert_before (gsi, t, GSI_SAME_STMT); | |
e41d82f5 | 829 | |
726a989a | 830 | if (stmt == gsi_stmt (*gsi)) |
e41d82f5 RH |
831 | { |
832 | x = build1 (IMAGPART_EXPR, inner_type, unshare_expr (lhs)); | |
726a989a RB |
833 | gimple_assign_set_lhs (stmt, x); |
834 | gimple_assign_set_rhs1 (stmt, i); | |
e41d82f5 RH |
835 | } |
836 | else | |
837 | { | |
838 | x = build1 (IMAGPART_EXPR, inner_type, unshare_expr (lhs)); | |
726a989a RB |
839 | t = gimple_build_assign (x, i); |
840 | gsi_insert_before (gsi, t, GSI_SAME_STMT); | |
e41d82f5 | 841 | |
726a989a RB |
842 | stmt = gsi_stmt (*gsi); |
843 | gcc_assert (gimple_code (stmt) == GIMPLE_RETURN); | |
844 | gimple_return_set_retval (stmt, lhs); | |
e41d82f5 RH |
845 | } |
846 | ||
e41d82f5 RH |
847 | update_stmt (stmt); |
848 | } | |
6de9cd9a DN |
849 | } |
850 | ||
851 | /* Expand complex addition to scalars: | |
852 | a + b = (ar + br) + i(ai + bi) | |
853 | a - b = (ar - br) + i(ai + bi) | |
854 | */ | |
855 | ||
856 | static void | |
726a989a | 857 | expand_complex_addition (gimple_stmt_iterator *gsi, tree inner_type, |
6de9cd9a | 858 | tree ar, tree ai, tree br, tree bi, |
e41d82f5 RH |
859 | enum tree_code code, |
860 | complex_lattice_t al, complex_lattice_t bl) | |
6de9cd9a DN |
861 | { |
862 | tree rr, ri; | |
863 | ||
e41d82f5 RH |
864 | switch (PAIR (al, bl)) |
865 | { | |
866 | case PAIR (ONLY_REAL, ONLY_REAL): | |
726a989a | 867 | rr = gimplify_build2 (gsi, code, inner_type, ar, br); |
e41d82f5 RH |
868 | ri = ai; |
869 | break; | |
870 | ||
871 | case PAIR (ONLY_REAL, ONLY_IMAG): | |
872 | rr = ar; | |
873 | if (code == MINUS_EXPR) | |
726a989a | 874 | ri = gimplify_build2 (gsi, MINUS_EXPR, inner_type, ai, bi); |
e41d82f5 RH |
875 | else |
876 | ri = bi; | |
877 | break; | |
878 | ||
879 | case PAIR (ONLY_IMAG, ONLY_REAL): | |
880 | if (code == MINUS_EXPR) | |
726a989a | 881 | rr = gimplify_build2 (gsi, MINUS_EXPR, inner_type, ar, br); |
e41d82f5 RH |
882 | else |
883 | rr = br; | |
884 | ri = ai; | |
885 | break; | |
886 | ||
887 | case PAIR (ONLY_IMAG, ONLY_IMAG): | |
888 | rr = ar; | |
726a989a | 889 | ri = gimplify_build2 (gsi, code, inner_type, ai, bi); |
e41d82f5 RH |
890 | break; |
891 | ||
892 | case PAIR (VARYING, ONLY_REAL): | |
726a989a | 893 | rr = gimplify_build2 (gsi, code, inner_type, ar, br); |
e41d82f5 RH |
894 | ri = ai; |
895 | break; | |
896 | ||
897 | case PAIR (VARYING, ONLY_IMAG): | |
898 | rr = ar; | |
726a989a | 899 | ri = gimplify_build2 (gsi, code, inner_type, ai, bi); |
e41d82f5 RH |
900 | break; |
901 | ||
902 | case PAIR (ONLY_REAL, VARYING): | |
903 | if (code == MINUS_EXPR) | |
904 | goto general; | |
726a989a | 905 | rr = gimplify_build2 (gsi, code, inner_type, ar, br); |
e41d82f5 RH |
906 | ri = bi; |
907 | break; | |
908 | ||
909 | case PAIR (ONLY_IMAG, VARYING): | |
910 | if (code == MINUS_EXPR) | |
911 | goto general; | |
912 | rr = br; | |
726a989a | 913 | ri = gimplify_build2 (gsi, code, inner_type, ai, bi); |
e41d82f5 RH |
914 | break; |
915 | ||
916 | case PAIR (VARYING, VARYING): | |
917 | general: | |
726a989a RB |
918 | rr = gimplify_build2 (gsi, code, inner_type, ar, br); |
919 | ri = gimplify_build2 (gsi, code, inner_type, ai, bi); | |
e41d82f5 RH |
920 | break; |
921 | ||
922 | default: | |
923 | gcc_unreachable (); | |
924 | } | |
6de9cd9a | 925 | |
726a989a | 926 | update_complex_assignment (gsi, rr, ri); |
6de9cd9a DN |
927 | } |
928 | ||
7e7e470f RH |
929 | /* Expand a complex multiplication or division to a libcall to the c99 |
930 | compliant routines. */ | |
931 | ||
932 | static void | |
726a989a | 933 | expand_complex_libcall (gimple_stmt_iterator *gsi, tree ar, tree ai, |
7e7e470f RH |
934 | tree br, tree bi, enum tree_code code) |
935 | { | |
936 | enum machine_mode mode; | |
937 | enum built_in_function bcode; | |
726a989a | 938 | tree fn, type, lhs; |
04be6ff5 | 939 | gimple old_stmt, stmt; |
7e7e470f | 940 | |
04be6ff5 JJ |
941 | old_stmt = gsi_stmt (*gsi); |
942 | lhs = gimple_assign_lhs (old_stmt); | |
726a989a | 943 | type = TREE_TYPE (lhs); |
7e7e470f RH |
944 | |
945 | mode = TYPE_MODE (type); | |
946 | gcc_assert (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT); | |
726a989a | 947 | |
7e7e470f | 948 | if (code == MULT_EXPR) |
32e8bb8e ILT |
949 | bcode = ((enum built_in_function) |
950 | (BUILT_IN_COMPLEX_MUL_MIN + mode - MIN_MODE_COMPLEX_FLOAT)); | |
7e7e470f | 951 | else if (code == RDIV_EXPR) |
32e8bb8e ILT |
952 | bcode = ((enum built_in_function) |
953 | (BUILT_IN_COMPLEX_DIV_MIN + mode - MIN_MODE_COMPLEX_FLOAT)); | |
7e7e470f RH |
954 | else |
955 | gcc_unreachable (); | |
e79983f4 | 956 | fn = builtin_decl_explicit (bcode); |
7e7e470f | 957 | |
726a989a RB |
958 | stmt = gimple_build_call (fn, 4, ar, ai, br, bi); |
959 | gimple_call_set_lhs (stmt, lhs); | |
f430bae8 | 960 | update_stmt (stmt); |
04be6ff5 JJ |
961 | gsi_replace (gsi, stmt, false); |
962 | ||
963 | if (maybe_clean_or_replace_eh_stmt (old_stmt, stmt)) | |
964 | gimple_purge_dead_eh_edges (gsi_bb (*gsi)); | |
e41d82f5 | 965 | |
5cd4ec7f | 966 | if (gimple_in_ssa_p (cfun)) |
e41d82f5 | 967 | { |
d5c77941 | 968 | type = TREE_TYPE (type); |
726a989a | 969 | update_complex_components (gsi, stmt, |
e41d82f5 RH |
970 | build1 (REALPART_EXPR, type, lhs), |
971 | build1 (IMAGPART_EXPR, type, lhs)); | |
726a989a | 972 | SSA_NAME_DEF_STMT (lhs) = stmt; |
e41d82f5 | 973 | } |
7e7e470f RH |
974 | } |
975 | ||
6de9cd9a DN |
976 | /* Expand complex multiplication to scalars: |
977 | a * b = (ar*br - ai*bi) + i(ar*bi + br*ai) | |
978 | */ | |
979 | ||
980 | static void | |
726a989a | 981 | expand_complex_multiplication (gimple_stmt_iterator *gsi, tree inner_type, |
e41d82f5 RH |
982 | tree ar, tree ai, tree br, tree bi, |
983 | complex_lattice_t al, complex_lattice_t bl) | |
6de9cd9a | 984 | { |
e41d82f5 | 985 | tree rr, ri; |
6de9cd9a | 986 | |
e41d82f5 | 987 | if (al < bl) |
7e7e470f | 988 | { |
e41d82f5 RH |
989 | complex_lattice_t tl; |
990 | rr = ar, ar = br, br = rr; | |
991 | ri = ai, ai = bi, bi = ri; | |
992 | tl = al, al = bl, bl = tl; | |
7e7e470f RH |
993 | } |
994 | ||
e41d82f5 RH |
995 | switch (PAIR (al, bl)) |
996 | { | |
997 | case PAIR (ONLY_REAL, ONLY_REAL): | |
726a989a | 998 | rr = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, br); |
e41d82f5 RH |
999 | ri = ai; |
1000 | break; | |
6de9cd9a | 1001 | |
e41d82f5 RH |
1002 | case PAIR (ONLY_IMAG, ONLY_REAL): |
1003 | rr = ar; | |
1004 | if (TREE_CODE (ai) == REAL_CST | |
1005 | && REAL_VALUES_IDENTICAL (TREE_REAL_CST (ai), dconst1)) | |
1006 | ri = br; | |
1007 | else | |
726a989a | 1008 | ri = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br); |
e41d82f5 | 1009 | break; |
6de9cd9a | 1010 | |
e41d82f5 | 1011 | case PAIR (ONLY_IMAG, ONLY_IMAG): |
726a989a RB |
1012 | rr = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, bi); |
1013 | rr = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, rr); | |
e41d82f5 RH |
1014 | ri = ar; |
1015 | break; | |
1016 | ||
1017 | case PAIR (VARYING, ONLY_REAL): | |
726a989a RB |
1018 | rr = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, br); |
1019 | ri = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br); | |
e41d82f5 RH |
1020 | break; |
1021 | ||
1022 | case PAIR (VARYING, ONLY_IMAG): | |
726a989a RB |
1023 | rr = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, bi); |
1024 | rr = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, rr); | |
1025 | ri = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, bi); | |
e41d82f5 RH |
1026 | break; |
1027 | ||
1028 | case PAIR (VARYING, VARYING): | |
1029 | if (flag_complex_method == 2 && SCALAR_FLOAT_TYPE_P (inner_type)) | |
1030 | { | |
726a989a | 1031 | expand_complex_libcall (gsi, ar, ai, br, bi, MULT_EXPR); |
e41d82f5 RH |
1032 | return; |
1033 | } | |
1034 | else | |
1035 | { | |
1036 | tree t1, t2, t3, t4; | |
1037 | ||
726a989a RB |
1038 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, br); |
1039 | t2 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, bi); | |
1040 | t3 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, bi); | |
e41d82f5 RH |
1041 | |
1042 | /* Avoid expanding redundant multiplication for the common | |
1043 | case of squaring a complex number. */ | |
1044 | if (ar == br && ai == bi) | |
1045 | t4 = t3; | |
1046 | else | |
726a989a | 1047 | t4 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br); |
e41d82f5 | 1048 | |
726a989a RB |
1049 | rr = gimplify_build2 (gsi, MINUS_EXPR, inner_type, t1, t2); |
1050 | ri = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t3, t4); | |
e41d82f5 RH |
1051 | } |
1052 | break; | |
1053 | ||
1054 | default: | |
1055 | gcc_unreachable (); | |
1056 | } | |
6de9cd9a | 1057 | |
726a989a | 1058 | update_complex_assignment (gsi, rr, ri); |
6de9cd9a DN |
1059 | } |
1060 | ||
e3d5405d | 1061 | /* Keep this algorithm in sync with fold-const.c:const_binop(). |
b8698a0f | 1062 | |
e3d5405d | 1063 | Expand complex division to scalars, straightforward algorithm. |
6de9cd9a DN |
1064 | a / b = ((ar*br + ai*bi)/t) + i((ai*br - ar*bi)/t) |
1065 | t = br*br + bi*bi | |
1066 | */ | |
1067 | ||
1068 | static void | |
726a989a | 1069 | expand_complex_div_straight (gimple_stmt_iterator *gsi, tree inner_type, |
6de9cd9a DN |
1070 | tree ar, tree ai, tree br, tree bi, |
1071 | enum tree_code code) | |
1072 | { | |
1073 | tree rr, ri, div, t1, t2, t3; | |
1074 | ||
726a989a RB |
1075 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, br, br); |
1076 | t2 = gimplify_build2 (gsi, MULT_EXPR, inner_type, bi, bi); | |
1077 | div = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, t2); | |
6de9cd9a | 1078 | |
726a989a RB |
1079 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, br); |
1080 | t2 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, bi); | |
1081 | t3 = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, t2); | |
1082 | rr = gimplify_build2 (gsi, code, inner_type, t3, div); | |
6de9cd9a | 1083 | |
726a989a RB |
1084 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, br); |
1085 | t2 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, bi); | |
1086 | t3 = gimplify_build2 (gsi, MINUS_EXPR, inner_type, t1, t2); | |
1087 | ri = gimplify_build2 (gsi, code, inner_type, t3, div); | |
6de9cd9a | 1088 | |
726a989a | 1089 | update_complex_assignment (gsi, rr, ri); |
6de9cd9a DN |
1090 | } |
1091 | ||
e3d5405d KG |
1092 | /* Keep this algorithm in sync with fold-const.c:const_binop(). |
1093 | ||
1094 | Expand complex division to scalars, modified algorithm to minimize | |
6de9cd9a DN |
1095 | overflow with wide input ranges. */ |
1096 | ||
1097 | static void | |
726a989a | 1098 | expand_complex_div_wide (gimple_stmt_iterator *gsi, tree inner_type, |
6de9cd9a DN |
1099 | tree ar, tree ai, tree br, tree bi, |
1100 | enum tree_code code) | |
1101 | { | |
04b03edb | 1102 | tree rr, ri, ratio, div, t1, t2, tr, ti, compare; |
c63f5a42 | 1103 | basic_block bb_cond, bb_true, bb_false, bb_join; |
726a989a | 1104 | gimple stmt; |
6de9cd9a DN |
1105 | |
1106 | /* Examine |br| < |bi|, and branch. */ | |
726a989a RB |
1107 | t1 = gimplify_build1 (gsi, ABS_EXPR, inner_type, br); |
1108 | t2 = gimplify_build1 (gsi, ABS_EXPR, inner_type, bi); | |
db3927fb | 1109 | compare = fold_build2_loc (gimple_location (gsi_stmt (*gsi)), |
b57d8e6f | 1110 | LT_EXPR, boolean_type_node, t1, t2); |
04b03edb | 1111 | STRIP_NOPS (compare); |
6de9cd9a | 1112 | |
c63f5a42 RH |
1113 | bb_cond = bb_true = bb_false = bb_join = NULL; |
1114 | rr = ri = tr = ti = NULL; | |
b57d8e6f | 1115 | if (TREE_CODE (compare) != INTEGER_CST) |
6de9cd9a | 1116 | { |
6de9cd9a | 1117 | edge e; |
726a989a | 1118 | gimple stmt; |
04b03edb | 1119 | tree cond, tmp; |
6de9cd9a | 1120 | |
04b03edb | 1121 | tmp = create_tmp_var (boolean_type_node, NULL); |
726a989a | 1122 | stmt = gimple_build_assign (tmp, compare); |
04b03edb | 1123 | if (gimple_in_ssa_p (cfun)) |
726a989a RB |
1124 | { |
1125 | tmp = make_ssa_name (tmp, stmt); | |
1126 | gimple_assign_set_lhs (stmt, tmp); | |
1127 | } | |
1128 | ||
1129 | gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
04b03edb | 1130 | |
db3927fb AH |
1131 | cond = fold_build2_loc (gimple_location (stmt), |
1132 | EQ_EXPR, boolean_type_node, tmp, boolean_true_node); | |
726a989a RB |
1133 | stmt = gimple_build_cond_from_tree (cond, NULL_TREE, NULL_TREE); |
1134 | gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
6de9cd9a | 1135 | |
6de9cd9a | 1136 | /* Split the original block, and create the TRUE and FALSE blocks. */ |
726a989a | 1137 | e = split_block (gsi_bb (*gsi), stmt); |
6de9cd9a DN |
1138 | bb_cond = e->src; |
1139 | bb_join = e->dest; | |
1140 | bb_true = create_empty_bb (bb_cond); | |
1141 | bb_false = create_empty_bb (bb_true); | |
1142 | ||
1143 | /* Wire the blocks together. */ | |
1144 | e->flags = EDGE_TRUE_VALUE; | |
1145 | redirect_edge_succ (e, bb_true); | |
1146 | make_edge (bb_cond, bb_false, EDGE_FALSE_VALUE); | |
520f34fa RH |
1147 | make_edge (bb_true, bb_join, EDGE_FALLTHRU); |
1148 | make_edge (bb_false, bb_join, EDGE_FALLTHRU); | |
6de9cd9a DN |
1149 | |
1150 | /* Update dominance info. Note that bb_join's data was | |
1151 | updated by split_block. */ | |
fce22de5 | 1152 | if (dom_info_available_p (CDI_DOMINATORS)) |
6de9cd9a DN |
1153 | { |
1154 | set_immediate_dominator (CDI_DOMINATORS, bb_true, bb_cond); | |
1155 | set_immediate_dominator (CDI_DOMINATORS, bb_false, bb_cond); | |
1156 | } | |
1157 | ||
7cc434a3 RG |
1158 | rr = create_tmp_reg (inner_type, NULL); |
1159 | ri = create_tmp_reg (inner_type, NULL); | |
6de9cd9a | 1160 | } |
c63f5a42 RH |
1161 | |
1162 | /* In the TRUE branch, we compute | |
1163 | ratio = br/bi; | |
1164 | div = (br * ratio) + bi; | |
1165 | tr = (ar * ratio) + ai; | |
1166 | ti = (ai * ratio) - ar; | |
1167 | tr = tr / div; | |
1168 | ti = ti / div; */ | |
04b03edb | 1169 | if (bb_true || integer_nonzerop (compare)) |
c63f5a42 RH |
1170 | { |
1171 | if (bb_true) | |
1172 | { | |
726a989a RB |
1173 | *gsi = gsi_last_bb (bb_true); |
1174 | gsi_insert_after (gsi, gimple_build_nop (), GSI_NEW_STMT); | |
c63f5a42 RH |
1175 | } |
1176 | ||
726a989a | 1177 | ratio = gimplify_build2 (gsi, code, inner_type, br, bi); |
c63f5a42 | 1178 | |
726a989a RB |
1179 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, br, ratio); |
1180 | div = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, bi); | |
c63f5a42 | 1181 | |
726a989a RB |
1182 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, ratio); |
1183 | tr = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, ai); | |
c63f5a42 | 1184 | |
726a989a RB |
1185 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, ratio); |
1186 | ti = gimplify_build2 (gsi, MINUS_EXPR, inner_type, t1, ar); | |
c63f5a42 | 1187 | |
726a989a RB |
1188 | tr = gimplify_build2 (gsi, code, inner_type, tr, div); |
1189 | ti = gimplify_build2 (gsi, code, inner_type, ti, div); | |
c63f5a42 RH |
1190 | |
1191 | if (bb_true) | |
1192 | { | |
726a989a RB |
1193 | stmt = gimple_build_assign (rr, tr); |
1194 | gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1195 | stmt = gimple_build_assign (ri, ti); | |
1196 | gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1197 | gsi_remove (gsi, true); | |
c63f5a42 RH |
1198 | } |
1199 | } | |
1200 | ||
1201 | /* In the FALSE branch, we compute | |
1202 | ratio = d/c; | |
1203 | divisor = (d * ratio) + c; | |
1204 | tr = (b * ratio) + a; | |
1205 | ti = b - (a * ratio); | |
1206 | tr = tr / div; | |
1207 | ti = ti / div; */ | |
04b03edb | 1208 | if (bb_false || integer_zerop (compare)) |
c63f5a42 RH |
1209 | { |
1210 | if (bb_false) | |
1211 | { | |
726a989a RB |
1212 | *gsi = gsi_last_bb (bb_false); |
1213 | gsi_insert_after (gsi, gimple_build_nop (), GSI_NEW_STMT); | |
c63f5a42 RH |
1214 | } |
1215 | ||
726a989a | 1216 | ratio = gimplify_build2 (gsi, code, inner_type, bi, br); |
c63f5a42 | 1217 | |
726a989a RB |
1218 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, bi, ratio); |
1219 | div = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, br); | |
c63f5a42 | 1220 | |
726a989a RB |
1221 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ai, ratio); |
1222 | tr = gimplify_build2 (gsi, PLUS_EXPR, inner_type, t1, ar); | |
c63f5a42 | 1223 | |
726a989a RB |
1224 | t1 = gimplify_build2 (gsi, MULT_EXPR, inner_type, ar, ratio); |
1225 | ti = gimplify_build2 (gsi, MINUS_EXPR, inner_type, ai, t1); | |
c63f5a42 | 1226 | |
726a989a RB |
1227 | tr = gimplify_build2 (gsi, code, inner_type, tr, div); |
1228 | ti = gimplify_build2 (gsi, code, inner_type, ti, div); | |
c63f5a42 RH |
1229 | |
1230 | if (bb_false) | |
1231 | { | |
726a989a RB |
1232 | stmt = gimple_build_assign (rr, tr); |
1233 | gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1234 | stmt = gimple_build_assign (ri, ti); | |
1235 | gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
1236 | gsi_remove (gsi, true); | |
c63f5a42 RH |
1237 | } |
1238 | } | |
1239 | ||
1240 | if (bb_join) | |
726a989a | 1241 | *gsi = gsi_start_bb (bb_join); |
c63f5a42 RH |
1242 | else |
1243 | rr = tr, ri = ti; | |
6de9cd9a | 1244 | |
726a989a | 1245 | update_complex_assignment (gsi, rr, ri); |
6de9cd9a DN |
1246 | } |
1247 | ||
1248 | /* Expand complex division to scalars. */ | |
1249 | ||
1250 | static void | |
726a989a | 1251 | expand_complex_division (gimple_stmt_iterator *gsi, tree inner_type, |
6de9cd9a | 1252 | tree ar, tree ai, tree br, tree bi, |
e41d82f5 RH |
1253 | enum tree_code code, |
1254 | complex_lattice_t al, complex_lattice_t bl) | |
6de9cd9a | 1255 | { |
e41d82f5 RH |
1256 | tree rr, ri; |
1257 | ||
1258 | switch (PAIR (al, bl)) | |
6de9cd9a | 1259 | { |
e41d82f5 | 1260 | case PAIR (ONLY_REAL, ONLY_REAL): |
726a989a | 1261 | rr = gimplify_build2 (gsi, code, inner_type, ar, br); |
e41d82f5 | 1262 | ri = ai; |
6de9cd9a | 1263 | break; |
7e7e470f | 1264 | |
e41d82f5 RH |
1265 | case PAIR (ONLY_REAL, ONLY_IMAG): |
1266 | rr = ai; | |
726a989a RB |
1267 | ri = gimplify_build2 (gsi, code, inner_type, ar, bi); |
1268 | ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ri); | |
e41d82f5 RH |
1269 | break; |
1270 | ||
1271 | case PAIR (ONLY_IMAG, ONLY_REAL): | |
1272 | rr = ar; | |
726a989a | 1273 | ri = gimplify_build2 (gsi, code, inner_type, ai, br); |
e41d82f5 | 1274 | break; |
7e7e470f | 1275 | |
e41d82f5 | 1276 | case PAIR (ONLY_IMAG, ONLY_IMAG): |
726a989a | 1277 | rr = gimplify_build2 (gsi, code, inner_type, ai, bi); |
e41d82f5 | 1278 | ri = ar; |
6de9cd9a | 1279 | break; |
7e7e470f | 1280 | |
e41d82f5 | 1281 | case PAIR (VARYING, ONLY_REAL): |
726a989a RB |
1282 | rr = gimplify_build2 (gsi, code, inner_type, ar, br); |
1283 | ri = gimplify_build2 (gsi, code, inner_type, ai, br); | |
e41d82f5 RH |
1284 | break; |
1285 | ||
1286 | case PAIR (VARYING, ONLY_IMAG): | |
726a989a RB |
1287 | rr = gimplify_build2 (gsi, code, inner_type, ai, bi); |
1288 | ri = gimplify_build2 (gsi, code, inner_type, ar, bi); | |
1289 | ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ri); | |
e41d82f5 RH |
1290 | |
1291 | case PAIR (ONLY_REAL, VARYING): | |
1292 | case PAIR (ONLY_IMAG, VARYING): | |
1293 | case PAIR (VARYING, VARYING): | |
1294 | switch (flag_complex_method) | |
1295 | { | |
1296 | case 0: | |
1297 | /* straightforward implementation of complex divide acceptable. */ | |
726a989a | 1298 | expand_complex_div_straight (gsi, inner_type, ar, ai, br, bi, code); |
e41d82f5 RH |
1299 | break; |
1300 | ||
1301 | case 2: | |
1302 | if (SCALAR_FLOAT_TYPE_P (inner_type)) | |
1303 | { | |
726a989a | 1304 | expand_complex_libcall (gsi, ar, ai, br, bi, code); |
e41d82f5 RH |
1305 | break; |
1306 | } | |
1307 | /* FALLTHRU */ | |
1308 | ||
1309 | case 1: | |
1310 | /* wide ranges of inputs must work for complex divide. */ | |
726a989a | 1311 | expand_complex_div_wide (gsi, inner_type, ar, ai, br, bi, code); |
e41d82f5 RH |
1312 | break; |
1313 | ||
1314 | default: | |
1315 | gcc_unreachable (); | |
1316 | } | |
1317 | return; | |
1318 | ||
6de9cd9a | 1319 | default: |
1e128c5f | 1320 | gcc_unreachable (); |
6de9cd9a | 1321 | } |
e41d82f5 | 1322 | |
726a989a | 1323 | update_complex_assignment (gsi, rr, ri); |
6de9cd9a DN |
1324 | } |
1325 | ||
1326 | /* Expand complex negation to scalars: | |
1327 | -a = (-ar) + i(-ai) | |
1328 | */ | |
1329 | ||
1330 | static void | |
726a989a | 1331 | expand_complex_negation (gimple_stmt_iterator *gsi, tree inner_type, |
6de9cd9a DN |
1332 | tree ar, tree ai) |
1333 | { | |
1334 | tree rr, ri; | |
1335 | ||
726a989a RB |
1336 | rr = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ar); |
1337 | ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ai); | |
6de9cd9a | 1338 | |
726a989a | 1339 | update_complex_assignment (gsi, rr, ri); |
6de9cd9a DN |
1340 | } |
1341 | ||
1342 | /* Expand complex conjugate to scalars: | |
1343 | ~a = (ar) + i(-ai) | |
1344 | */ | |
1345 | ||
1346 | static void | |
726a989a | 1347 | expand_complex_conjugate (gimple_stmt_iterator *gsi, tree inner_type, |
6de9cd9a DN |
1348 | tree ar, tree ai) |
1349 | { | |
1350 | tree ri; | |
1351 | ||
726a989a | 1352 | ri = gimplify_build1 (gsi, NEGATE_EXPR, inner_type, ai); |
6de9cd9a | 1353 | |
726a989a | 1354 | update_complex_assignment (gsi, ar, ri); |
6de9cd9a DN |
1355 | } |
1356 | ||
1357 | /* Expand complex comparison (EQ or NE only). */ | |
1358 | ||
1359 | static void | |
726a989a | 1360 | expand_complex_comparison (gimple_stmt_iterator *gsi, tree ar, tree ai, |
6de9cd9a DN |
1361 | tree br, tree bi, enum tree_code code) |
1362 | { | |
726a989a RB |
1363 | tree cr, ci, cc, type; |
1364 | gimple stmt; | |
6de9cd9a | 1365 | |
726a989a RB |
1366 | cr = gimplify_build2 (gsi, code, boolean_type_node, ar, br); |
1367 | ci = gimplify_build2 (gsi, code, boolean_type_node, ai, bi); | |
1368 | cc = gimplify_build2 (gsi, | |
26277d41 PB |
1369 | (code == EQ_EXPR ? TRUTH_AND_EXPR : TRUTH_OR_EXPR), |
1370 | boolean_type_node, cr, ci); | |
6de9cd9a | 1371 | |
726a989a | 1372 | stmt = gsi_stmt (*gsi); |
6de9cd9a | 1373 | |
726a989a | 1374 | switch (gimple_code (stmt)) |
6de9cd9a | 1375 | { |
726a989a RB |
1376 | case GIMPLE_RETURN: |
1377 | type = TREE_TYPE (gimple_return_retval (stmt)); | |
1378 | gimple_return_set_retval (stmt, fold_convert (type, cc)); | |
6de9cd9a | 1379 | break; |
726a989a RB |
1380 | |
1381 | case GIMPLE_ASSIGN: | |
1382 | type = TREE_TYPE (gimple_assign_lhs (stmt)); | |
1383 | gimple_assign_set_rhs_from_tree (gsi, fold_convert (type, cc)); | |
1384 | stmt = gsi_stmt (*gsi); | |
6de9cd9a | 1385 | break; |
726a989a RB |
1386 | |
1387 | case GIMPLE_COND: | |
1388 | gimple_cond_set_code (stmt, EQ_EXPR); | |
1389 | gimple_cond_set_lhs (stmt, cc); | |
1390 | gimple_cond_set_rhs (stmt, boolean_true_node); | |
1391 | break; | |
1392 | ||
6de9cd9a | 1393 | default: |
1e128c5f | 1394 | gcc_unreachable (); |
6de9cd9a | 1395 | } |
68b9f53b | 1396 | |
e41d82f5 | 1397 | update_stmt (stmt); |
6de9cd9a DN |
1398 | } |
1399 | ||
726a989a | 1400 | |
6de9cd9a DN |
1401 | /* Process one statement. If we identify a complex operation, expand it. */ |
1402 | ||
1403 | static void | |
726a989a | 1404 | expand_complex_operations_1 (gimple_stmt_iterator *gsi) |
6de9cd9a | 1405 | { |
726a989a RB |
1406 | gimple stmt = gsi_stmt (*gsi); |
1407 | tree type, inner_type, lhs; | |
6de9cd9a | 1408 | tree ac, ar, ai, bc, br, bi; |
e41d82f5 | 1409 | complex_lattice_t al, bl; |
6de9cd9a DN |
1410 | enum tree_code code; |
1411 | ||
726a989a RB |
1412 | lhs = gimple_get_lhs (stmt); |
1413 | if (!lhs && gimple_code (stmt) != GIMPLE_COND) | |
1414 | return; | |
6de9cd9a | 1415 | |
726a989a RB |
1416 | type = TREE_TYPE (gimple_op (stmt, 0)); |
1417 | code = gimple_expr_code (stmt); | |
6de9cd9a DN |
1418 | |
1419 | /* Initial filter for operations we handle. */ | |
1420 | switch (code) | |
1421 | { | |
1422 | case PLUS_EXPR: | |
1423 | case MINUS_EXPR: | |
1424 | case MULT_EXPR: | |
1425 | case TRUNC_DIV_EXPR: | |
1426 | case CEIL_DIV_EXPR: | |
1427 | case FLOOR_DIV_EXPR: | |
1428 | case ROUND_DIV_EXPR: | |
1429 | case RDIV_EXPR: | |
1430 | case NEGATE_EXPR: | |
1431 | case CONJ_EXPR: | |
1432 | if (TREE_CODE (type) != COMPLEX_TYPE) | |
1433 | return; | |
1434 | inner_type = TREE_TYPE (type); | |
1435 | break; | |
1436 | ||
1437 | case EQ_EXPR: | |
1438 | case NE_EXPR: | |
726a989a RB |
1439 | /* Note, both GIMPLE_ASSIGN and GIMPLE_COND may have an EQ_EXPR |
1440 | subocde, so we need to access the operands using gimple_op. */ | |
1441 | inner_type = TREE_TYPE (gimple_op (stmt, 1)); | |
6de9cd9a DN |
1442 | if (TREE_CODE (inner_type) != COMPLEX_TYPE) |
1443 | return; | |
1444 | break; | |
1445 | ||
1446 | default: | |
e41d82f5 | 1447 | { |
726a989a | 1448 | tree rhs; |
a9b77cd1 | 1449 | |
726a989a RB |
1450 | /* GIMPLE_COND may also fallthru here, but we do not need to |
1451 | do anything with it. */ | |
1452 | if (gimple_code (stmt) == GIMPLE_COND) | |
a9b77cd1 ZD |
1453 | return; |
1454 | ||
e41d82f5 | 1455 | if (TREE_CODE (type) == COMPLEX_TYPE) |
726a989a RB |
1456 | expand_complex_move (gsi, type); |
1457 | else if (is_gimple_assign (stmt) | |
1458 | && (gimple_assign_rhs_code (stmt) == REALPART_EXPR | |
1459 | || gimple_assign_rhs_code (stmt) == IMAGPART_EXPR) | |
1460 | && TREE_CODE (lhs) == SSA_NAME) | |
e41d82f5 | 1461 | { |
726a989a RB |
1462 | rhs = gimple_assign_rhs1 (stmt); |
1463 | rhs = extract_component (gsi, TREE_OPERAND (rhs, 0), | |
1464 | gimple_assign_rhs_code (stmt) | |
1465 | == IMAGPART_EXPR, | |
1466 | false); | |
1467 | gimple_assign_set_rhs_from_tree (gsi, rhs); | |
1468 | stmt = gsi_stmt (*gsi); | |
e41d82f5 RH |
1469 | update_stmt (stmt); |
1470 | } | |
1471 | } | |
6de9cd9a DN |
1472 | return; |
1473 | } | |
1474 | ||
1475 | /* Extract the components of the two complex values. Make sure and | |
1476 | handle the common case of the same value used twice specially. */ | |
726a989a RB |
1477 | if (is_gimple_assign (stmt)) |
1478 | { | |
1479 | ac = gimple_assign_rhs1 (stmt); | |
1480 | bc = (gimple_num_ops (stmt) > 2) ? gimple_assign_rhs2 (stmt) : NULL; | |
1481 | } | |
1482 | /* GIMPLE_CALL can not get here. */ | |
6de9cd9a DN |
1483 | else |
1484 | { | |
726a989a RB |
1485 | ac = gimple_cond_lhs (stmt); |
1486 | bc = gimple_cond_rhs (stmt); | |
1487 | } | |
1488 | ||
1489 | ar = extract_component (gsi, ac, false, true); | |
1490 | ai = extract_component (gsi, ac, true, true); | |
1491 | ||
1492 | if (ac == bc) | |
1493 | br = ar, bi = ai; | |
1494 | else if (bc) | |
1495 | { | |
1496 | br = extract_component (gsi, bc, 0, true); | |
1497 | bi = extract_component (gsi, bc, 1, true); | |
6de9cd9a | 1498 | } |
726a989a RB |
1499 | else |
1500 | br = bi = NULL_TREE; | |
6de9cd9a | 1501 | |
5cd4ec7f | 1502 | if (gimple_in_ssa_p (cfun)) |
e41d82f5 RH |
1503 | { |
1504 | al = find_lattice_value (ac); | |
1505 | if (al == UNINITIALIZED) | |
1506 | al = VARYING; | |
1507 | ||
1508 | if (TREE_CODE_CLASS (code) == tcc_unary) | |
1509 | bl = UNINITIALIZED; | |
1510 | else if (ac == bc) | |
1511 | bl = al; | |
1512 | else | |
1513 | { | |
1514 | bl = find_lattice_value (bc); | |
1515 | if (bl == UNINITIALIZED) | |
1516 | bl = VARYING; | |
1517 | } | |
1518 | } | |
1519 | else | |
1520 | al = bl = VARYING; | |
1521 | ||
6de9cd9a DN |
1522 | switch (code) |
1523 | { | |
1524 | case PLUS_EXPR: | |
1525 | case MINUS_EXPR: | |
726a989a | 1526 | expand_complex_addition (gsi, inner_type, ar, ai, br, bi, code, al, bl); |
6de9cd9a DN |
1527 | break; |
1528 | ||
1529 | case MULT_EXPR: | |
726a989a | 1530 | expand_complex_multiplication (gsi, inner_type, ar, ai, br, bi, al, bl); |
6de9cd9a DN |
1531 | break; |
1532 | ||
1533 | case TRUNC_DIV_EXPR: | |
1534 | case CEIL_DIV_EXPR: | |
1535 | case FLOOR_DIV_EXPR: | |
1536 | case ROUND_DIV_EXPR: | |
1537 | case RDIV_EXPR: | |
726a989a | 1538 | expand_complex_division (gsi, inner_type, ar, ai, br, bi, code, al, bl); |
6de9cd9a | 1539 | break; |
b8698a0f | 1540 | |
6de9cd9a | 1541 | case NEGATE_EXPR: |
726a989a | 1542 | expand_complex_negation (gsi, inner_type, ar, ai); |
6de9cd9a DN |
1543 | break; |
1544 | ||
1545 | case CONJ_EXPR: | |
726a989a | 1546 | expand_complex_conjugate (gsi, inner_type, ar, ai); |
6de9cd9a DN |
1547 | break; |
1548 | ||
1549 | case EQ_EXPR: | |
1550 | case NE_EXPR: | |
726a989a | 1551 | expand_complex_comparison (gsi, ar, ai, br, bi, code); |
6de9cd9a DN |
1552 | break; |
1553 | ||
1554 | default: | |
1e128c5f | 1555 | gcc_unreachable (); |
6de9cd9a DN |
1556 | } |
1557 | } | |
26277d41 | 1558 | |
e41d82f5 RH |
1559 | \f |
1560 | /* Entry point for complex operation lowering during optimization. */ | |
1561 | ||
c2924966 | 1562 | static unsigned int |
2b725155 | 1563 | tree_lower_complex (void) |
6de9cd9a | 1564 | { |
e41d82f5 | 1565 | int old_last_basic_block; |
726a989a | 1566 | gimple_stmt_iterator gsi; |
6de9cd9a DN |
1567 | basic_block bb; |
1568 | ||
e41d82f5 | 1569 | if (!init_dont_simulate_again ()) |
c2924966 | 1570 | return 0; |
e41d82f5 RH |
1571 | |
1572 | complex_lattice_values = VEC_alloc (complex_lattice_t, heap, num_ssa_names); | |
a590ac65 KH |
1573 | VEC_safe_grow_cleared (complex_lattice_t, heap, |
1574 | complex_lattice_values, num_ssa_names); | |
e41d82f5 | 1575 | |
95a8c155 | 1576 | init_parameter_lattice_values (); |
e41d82f5 RH |
1577 | ssa_propagate (complex_visit_stmt, complex_visit_phi); |
1578 | ||
95a8c155 RH |
1579 | complex_variable_components = htab_create (10, int_tree_map_hash, |
1580 | int_tree_map_eq, free); | |
1581 | ||
1582 | complex_ssa_name_components = VEC_alloc (tree, heap, 2*num_ssa_names); | |
a590ac65 KH |
1583 | VEC_safe_grow_cleared (tree, heap, complex_ssa_name_components, |
1584 | 2 * num_ssa_names); | |
95a8c155 | 1585 | |
e41d82f5 RH |
1586 | update_parameter_components (); |
1587 | ||
95a8c155 | 1588 | /* ??? Ideally we'd traverse the blocks in breadth-first order. */ |
e41d82f5 | 1589 | old_last_basic_block = last_basic_block; |
6de9cd9a DN |
1590 | FOR_EACH_BB (bb) |
1591 | { | |
1592 | if (bb->index >= old_last_basic_block) | |
1593 | continue; | |
726a989a | 1594 | |
e41d82f5 | 1595 | update_phi_components (bb); |
726a989a RB |
1596 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
1597 | expand_complex_operations_1 (&gsi); | |
6de9cd9a | 1598 | } |
6de9cd9a | 1599 | |
726a989a | 1600 | gsi_commit_edge_inserts (); |
e41d82f5 | 1601 | |
95a8c155 RH |
1602 | htab_delete (complex_variable_components); |
1603 | VEC_free (tree, heap, complex_ssa_name_components); | |
e41d82f5 | 1604 | VEC_free (complex_lattice_t, heap, complex_lattice_values); |
c2924966 | 1605 | return 0; |
e41d82f5 | 1606 | } |
26277d41 | 1607 | |
b8698a0f | 1608 | struct gimple_opt_pass pass_lower_complex = |
26277d41 | 1609 | { |
8ddbbcae JH |
1610 | { |
1611 | GIMPLE_PASS, | |
2b725155 | 1612 | "cplxlower", /* name */ |
26277d41 | 1613 | 0, /* gate */ |
2b725155 | 1614 | tree_lower_complex, /* execute */ |
26277d41 PB |
1615 | NULL, /* sub */ |
1616 | NULL, /* next */ | |
1617 | 0, /* static_pass_number */ | |
7072a650 | 1618 | TV_NONE, /* tv_id */ |
e41d82f5 | 1619 | PROP_ssa, /* properties_required */ |
688a482d | 1620 | PROP_gimple_lcx, /* properties_provided */ |
ae07b463 | 1621 | 0, /* properties_destroyed */ |
e41d82f5 | 1622 | 0, /* todo_flags_start */ |
22c5fa5f | 1623 | TODO_ggc_collect |
706ca88e | 1624 | | TODO_update_ssa |
8ddbbcae JH |
1625 | | TODO_verify_stmts /* todo_flags_finish */ |
1626 | } | |
e41d82f5 RH |
1627 | }; |
1628 | ||
1629 | \f | |
e41d82f5 RH |
1630 | static bool |
1631 | gate_no_optimization (void) | |
1632 | { | |
1f9081d1 XDL |
1633 | /* With errors, normal optimization passes are not run. If we don't |
1634 | lower complex operations at all, rtl expansion will abort. */ | |
1635 | return !(cfun->curr_properties & PROP_gimple_lcx); | |
e41d82f5 RH |
1636 | } |
1637 | ||
b8698a0f | 1638 | struct gimple_opt_pass pass_lower_complex_O0 = |
e41d82f5 | 1639 | { |
8ddbbcae JH |
1640 | { |
1641 | GIMPLE_PASS, | |
e41d82f5 RH |
1642 | "cplxlower0", /* name */ |
1643 | gate_no_optimization, /* gate */ | |
688a482d | 1644 | tree_lower_complex, /* execute */ |
e41d82f5 RH |
1645 | NULL, /* sub */ |
1646 | NULL, /* next */ | |
1647 | 0, /* static_pass_number */ | |
7072a650 | 1648 | TV_NONE, /* tv_id */ |
26277d41 | 1649 | PROP_cfg, /* properties_required */ |
688a482d | 1650 | PROP_gimple_lcx, /* properties_provided */ |
26277d41 PB |
1651 | 0, /* properties_destroyed */ |
1652 | 0, /* todo_flags_start */ | |
22c5fa5f | 1653 | TODO_ggc_collect |
688a482d RG |
1654 | | TODO_update_ssa |
1655 | | TODO_verify_stmts /* todo_flags_finish */ | |
8ddbbcae | 1656 | } |
6de9cd9a | 1657 | }; |