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dffec8eb | 1 | /* GIMPLE store merging and byte swapping passes. |
99dee823 | 2 | Copyright (C) 2009-2021 Free Software Foundation, Inc. |
f663d9ad KT |
3 | Contributed by ARM Ltd. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
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 | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | General Public License for more details. | |
16 | ||
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 | ||
c94c3532 EB |
21 | /* The purpose of the store merging pass is to combine multiple memory stores |
22 | of constant values, values loaded from memory, bitwise operations on those, | |
23 | or bit-field values, to consecutive locations, into fewer wider stores. | |
24 | ||
f663d9ad KT |
25 | For example, if we have a sequence peforming four byte stores to |
26 | consecutive memory locations: | |
27 | [p ] := imm1; | |
28 | [p + 1B] := imm2; | |
29 | [p + 2B] := imm3; | |
30 | [p + 3B] := imm4; | |
31 | we can transform this into a single 4-byte store if the target supports it: | |
c94c3532 | 32 | [p] := imm1:imm2:imm3:imm4 concatenated according to endianness. |
f663d9ad | 33 | |
245f6de1 JJ |
34 | Or: |
35 | [p ] := [q ]; | |
36 | [p + 1B] := [q + 1B]; | |
37 | [p + 2B] := [q + 2B]; | |
38 | [p + 3B] := [q + 3B]; | |
39 | if there is no overlap can be transformed into a single 4-byte | |
40 | load followed by single 4-byte store. | |
41 | ||
42 | Or: | |
43 | [p ] := [q ] ^ imm1; | |
44 | [p + 1B] := [q + 1B] ^ imm2; | |
45 | [p + 2B] := [q + 2B] ^ imm3; | |
46 | [p + 3B] := [q + 3B] ^ imm4; | |
47 | if there is no overlap can be transformed into a single 4-byte | |
48 | load, xored with imm1:imm2:imm3:imm4 and stored using a single 4-byte store. | |
49 | ||
c94c3532 EB |
50 | Or: |
51 | [p:1 ] := imm; | |
52 | [p:31] := val & 0x7FFFFFFF; | |
53 | we can transform this into a single 4-byte store if the target supports it: | |
54 | [p] := imm:(val & 0x7FFFFFFF) concatenated according to endianness. | |
55 | ||
f663d9ad KT |
56 | The algorithm is applied to each basic block in three phases: |
57 | ||
c94c3532 EB |
58 | 1) Scan through the basic block and record assignments to destinations |
59 | that can be expressed as a store to memory of a certain size at a certain | |
60 | bit offset from base expressions we can handle. For bit-fields we also | |
61 | record the surrounding bit region, i.e. bits that could be stored in | |
245f6de1 JJ |
62 | a read-modify-write operation when storing the bit-field. Record store |
63 | chains to different bases in a hash_map (m_stores) and make sure to | |
700d4cb0 | 64 | terminate such chains when appropriate (for example when the stored |
245f6de1 | 65 | values get used subsequently). |
f663d9ad KT |
66 | These stores can be a result of structure element initializers, array stores |
67 | etc. A store_immediate_info object is recorded for every such store. | |
68 | Record as many such assignments to a single base as possible until a | |
69 | statement that interferes with the store sequence is encountered. | |
c94c3532 EB |
70 | Each store has up to 2 operands, which can be a either constant, a memory |
71 | load or an SSA name, from which the value to be stored can be computed. | |
245f6de1 JJ |
72 | At most one of the operands can be a constant. The operands are recorded |
73 | in store_operand_info struct. | |
f663d9ad | 74 | |
c94c3532 | 75 | 2) Analyze the chains of stores recorded in phase 1) (i.e. the vector of |
f663d9ad | 76 | store_immediate_info objects) and coalesce contiguous stores into |
c94c3532 | 77 | merged_store_group objects. For bit-field stores, we don't need to |
245f6de1 JJ |
78 | require the stores to be contiguous, just their surrounding bit regions |
79 | have to be contiguous. If the expression being stored is different | |
80 | between adjacent stores, such as one store storing a constant and | |
81 | following storing a value loaded from memory, or if the loaded memory | |
82 | objects are not adjacent, a new merged_store_group is created as well. | |
f663d9ad KT |
83 | |
84 | For example, given the stores: | |
85 | [p ] := 0; | |
86 | [p + 1B] := 1; | |
87 | [p + 3B] := 0; | |
88 | [p + 4B] := 1; | |
89 | [p + 5B] := 0; | |
90 | [p + 6B] := 0; | |
91 | This phase would produce two merged_store_group objects, one recording the | |
92 | two bytes stored in the memory region [p : p + 1] and another | |
93 | recording the four bytes stored in the memory region [p + 3 : p + 6]. | |
94 | ||
95 | 3) The merged_store_group objects produced in phase 2) are processed | |
96 | to generate the sequence of wider stores that set the contiguous memory | |
97 | regions to the sequence of bytes that correspond to it. This may emit | |
98 | multiple stores per store group to handle contiguous stores that are not | |
99 | of a size that is a power of 2. For example it can try to emit a 40-bit | |
100 | store as a 32-bit store followed by an 8-bit store. | |
c94c3532 EB |
101 | We try to emit as wide stores as we can while respecting STRICT_ALIGNMENT |
102 | or TARGET_SLOW_UNALIGNED_ACCESS settings. | |
f663d9ad KT |
103 | |
104 | Note on endianness and example: | |
105 | Consider 2 contiguous 16-bit stores followed by 2 contiguous 8-bit stores: | |
106 | [p ] := 0x1234; | |
107 | [p + 2B] := 0x5678; | |
108 | [p + 4B] := 0xab; | |
109 | [p + 5B] := 0xcd; | |
110 | ||
111 | The memory layout for little-endian (LE) and big-endian (BE) must be: | |
112 | p |LE|BE| | |
113 | --------- | |
114 | 0 |34|12| | |
115 | 1 |12|34| | |
116 | 2 |78|56| | |
117 | 3 |56|78| | |
118 | 4 |ab|ab| | |
119 | 5 |cd|cd| | |
120 | ||
121 | To merge these into a single 48-bit merged value 'val' in phase 2) | |
122 | on little-endian we insert stores to higher (consecutive) bitpositions | |
123 | into the most significant bits of the merged value. | |
124 | The final merged value would be: 0xcdab56781234 | |
125 | ||
126 | For big-endian we insert stores to higher bitpositions into the least | |
127 | significant bits of the merged value. | |
128 | The final merged value would be: 0x12345678abcd | |
129 | ||
130 | Then, in phase 3), we want to emit this 48-bit value as a 32-bit store | |
131 | followed by a 16-bit store. Again, we must consider endianness when | |
132 | breaking down the 48-bit value 'val' computed above. | |
133 | For little endian we emit: | |
134 | [p] (32-bit) := 0x56781234; // val & 0x0000ffffffff; | |
135 | [p + 4B] (16-bit) := 0xcdab; // (val & 0xffff00000000) >> 32; | |
136 | ||
137 | Whereas for big-endian we emit: | |
138 | [p] (32-bit) := 0x12345678; // (val & 0xffffffff0000) >> 16; | |
139 | [p + 4B] (16-bit) := 0xabcd; // val & 0x00000000ffff; */ | |
140 | ||
141 | #include "config.h" | |
142 | #include "system.h" | |
143 | #include "coretypes.h" | |
144 | #include "backend.h" | |
145 | #include "tree.h" | |
146 | #include "gimple.h" | |
147 | #include "builtins.h" | |
148 | #include "fold-const.h" | |
149 | #include "tree-pass.h" | |
150 | #include "ssa.h" | |
151 | #include "gimple-pretty-print.h" | |
152 | #include "alias.h" | |
153 | #include "fold-const.h" | |
f663d9ad KT |
154 | #include "print-tree.h" |
155 | #include "tree-hash-traits.h" | |
156 | #include "gimple-iterator.h" | |
157 | #include "gimplify.h" | |
c94c3532 | 158 | #include "gimple-fold.h" |
f663d9ad KT |
159 | #include "stor-layout.h" |
160 | #include "timevar.h" | |
629387a6 EB |
161 | #include "cfganal.h" |
162 | #include "cfgcleanup.h" | |
f663d9ad | 163 | #include "tree-cfg.h" |
629387a6 | 164 | #include "except.h" |
f663d9ad KT |
165 | #include "tree-eh.h" |
166 | #include "target.h" | |
aa55dc0c | 167 | #include "gimplify-me.h" |
a62b3dc5 JJ |
168 | #include "rtl.h" |
169 | #include "expr.h" /* For get_bit_range. */ | |
dffec8eb | 170 | #include "optabs-tree.h" |
a95b474a | 171 | #include "dbgcnt.h" |
c22d8787 | 172 | #include "selftest.h" |
f663d9ad KT |
173 | |
174 | /* The maximum size (in bits) of the stores this pass should generate. */ | |
175 | #define MAX_STORE_BITSIZE (BITS_PER_WORD) | |
176 | #define MAX_STORE_BYTES (MAX_STORE_BITSIZE / BITS_PER_UNIT) | |
177 | ||
245f6de1 JJ |
178 | /* Limit to bound the number of aliasing checks for loads with the same |
179 | vuse as the corresponding store. */ | |
180 | #define MAX_STORE_ALIAS_CHECKS 64 | |
181 | ||
f663d9ad KT |
182 | namespace { |
183 | ||
bebadeca | 184 | struct bswap_stat |
dffec8eb JJ |
185 | { |
186 | /* Number of hand-written 16-bit nop / bswaps found. */ | |
187 | int found_16bit; | |
188 | ||
189 | /* Number of hand-written 32-bit nop / bswaps found. */ | |
190 | int found_32bit; | |
191 | ||
192 | /* Number of hand-written 64-bit nop / bswaps found. */ | |
193 | int found_64bit; | |
194 | } nop_stats, bswap_stats; | |
195 | ||
196 | /* A symbolic number structure is used to detect byte permutation and selection | |
197 | patterns of a source. To achieve that, its field N contains an artificial | |
198 | number consisting of BITS_PER_MARKER sized markers tracking where does each | |
199 | byte come from in the source: | |
200 | ||
201 | 0 - target byte has the value 0 | |
202 | FF - target byte has an unknown value (eg. due to sign extension) | |
203 | 1..size - marker value is the byte index in the source (0 for lsb). | |
204 | ||
205 | To detect permutations on memory sources (arrays and structures), a symbolic | |
206 | number is also associated: | |
207 | - a base address BASE_ADDR and an OFFSET giving the address of the source; | |
208 | - a range which gives the difference between the highest and lowest accessed | |
209 | memory location to make such a symbolic number; | |
210 | - the address SRC of the source element of lowest address as a convenience | |
211 | to easily get BASE_ADDR + offset + lowest bytepos; | |
212 | - number of expressions N_OPS bitwise ored together to represent | |
213 | approximate cost of the computation. | |
214 | ||
215 | Note 1: the range is different from size as size reflects the size of the | |
216 | type of the current expression. For instance, for an array char a[], | |
217 | (short) a[0] | (short) a[3] would have a size of 2 but a range of 4 while | |
218 | (short) a[0] | ((short) a[0] << 1) would still have a size of 2 but this | |
219 | time a range of 1. | |
220 | ||
221 | Note 2: for non-memory sources, range holds the same value as size. | |
222 | ||
223 | Note 3: SRC points to the SSA_NAME in case of non-memory source. */ | |
224 | ||
225 | struct symbolic_number { | |
226 | uint64_t n; | |
227 | tree type; | |
228 | tree base_addr; | |
229 | tree offset; | |
4a022c70 | 230 | poly_int64_pod bytepos; |
dffec8eb JJ |
231 | tree src; |
232 | tree alias_set; | |
233 | tree vuse; | |
234 | unsigned HOST_WIDE_INT range; | |
235 | int n_ops; | |
236 | }; | |
237 | ||
238 | #define BITS_PER_MARKER 8 | |
239 | #define MARKER_MASK ((1 << BITS_PER_MARKER) - 1) | |
240 | #define MARKER_BYTE_UNKNOWN MARKER_MASK | |
241 | #define HEAD_MARKER(n, size) \ | |
242 | ((n) & ((uint64_t) MARKER_MASK << (((size) - 1) * BITS_PER_MARKER))) | |
243 | ||
244 | /* The number which the find_bswap_or_nop_1 result should match in | |
245 | order to have a nop. The number is masked according to the size of | |
246 | the symbolic number before using it. */ | |
247 | #define CMPNOP (sizeof (int64_t) < 8 ? 0 : \ | |
248 | (uint64_t)0x08070605 << 32 | 0x04030201) | |
249 | ||
250 | /* The number which the find_bswap_or_nop_1 result should match in | |
251 | order to have a byte swap. The number is masked according to the | |
252 | size of the symbolic number before using it. */ | |
253 | #define CMPXCHG (sizeof (int64_t) < 8 ? 0 : \ | |
254 | (uint64_t)0x01020304 << 32 | 0x05060708) | |
255 | ||
256 | /* Perform a SHIFT or ROTATE operation by COUNT bits on symbolic | |
257 | number N. Return false if the requested operation is not permitted | |
258 | on a symbolic number. */ | |
259 | ||
260 | inline bool | |
261 | do_shift_rotate (enum tree_code code, | |
262 | struct symbolic_number *n, | |
263 | int count) | |
264 | { | |
265 | int i, size = TYPE_PRECISION (n->type) / BITS_PER_UNIT; | |
266 | unsigned head_marker; | |
267 | ||
444cda74 JJ |
268 | if (count < 0 |
269 | || count >= TYPE_PRECISION (n->type) | |
270 | || count % BITS_PER_UNIT != 0) | |
dffec8eb JJ |
271 | return false; |
272 | count = (count / BITS_PER_UNIT) * BITS_PER_MARKER; | |
273 | ||
274 | /* Zero out the extra bits of N in order to avoid them being shifted | |
275 | into the significant bits. */ | |
276 | if (size < 64 / BITS_PER_MARKER) | |
277 | n->n &= ((uint64_t) 1 << (size * BITS_PER_MARKER)) - 1; | |
278 | ||
279 | switch (code) | |
280 | { | |
281 | case LSHIFT_EXPR: | |
282 | n->n <<= count; | |
283 | break; | |
284 | case RSHIFT_EXPR: | |
285 | head_marker = HEAD_MARKER (n->n, size); | |
286 | n->n >>= count; | |
287 | /* Arithmetic shift of signed type: result is dependent on the value. */ | |
288 | if (!TYPE_UNSIGNED (n->type) && head_marker) | |
289 | for (i = 0; i < count / BITS_PER_MARKER; i++) | |
290 | n->n |= (uint64_t) MARKER_BYTE_UNKNOWN | |
291 | << ((size - 1 - i) * BITS_PER_MARKER); | |
292 | break; | |
293 | case LROTATE_EXPR: | |
294 | n->n = (n->n << count) | (n->n >> ((size * BITS_PER_MARKER) - count)); | |
295 | break; | |
296 | case RROTATE_EXPR: | |
297 | n->n = (n->n >> count) | (n->n << ((size * BITS_PER_MARKER) - count)); | |
298 | break; | |
299 | default: | |
300 | return false; | |
301 | } | |
302 | /* Zero unused bits for size. */ | |
303 | if (size < 64 / BITS_PER_MARKER) | |
304 | n->n &= ((uint64_t) 1 << (size * BITS_PER_MARKER)) - 1; | |
305 | return true; | |
306 | } | |
307 | ||
308 | /* Perform sanity checking for the symbolic number N and the gimple | |
309 | statement STMT. */ | |
310 | ||
311 | inline bool | |
312 | verify_symbolic_number_p (struct symbolic_number *n, gimple *stmt) | |
313 | { | |
314 | tree lhs_type; | |
315 | ||
650c70a9 | 316 | lhs_type = TREE_TYPE (gimple_get_lhs (stmt)); |
dffec8eb | 317 | |
5ea39b24 JJ |
318 | if (TREE_CODE (lhs_type) != INTEGER_TYPE |
319 | && TREE_CODE (lhs_type) != ENUMERAL_TYPE) | |
dffec8eb JJ |
320 | return false; |
321 | ||
322 | if (TYPE_PRECISION (lhs_type) != TYPE_PRECISION (n->type)) | |
323 | return false; | |
324 | ||
325 | return true; | |
326 | } | |
327 | ||
328 | /* Initialize the symbolic number N for the bswap pass from the base element | |
329 | SRC manipulated by the bitwise OR expression. */ | |
330 | ||
331 | bool | |
332 | init_symbolic_number (struct symbolic_number *n, tree src) | |
333 | { | |
334 | int size; | |
335 | ||
5b9a65ec | 336 | if (!INTEGRAL_TYPE_P (TREE_TYPE (src)) && !POINTER_TYPE_P (TREE_TYPE (src))) |
dffec8eb JJ |
337 | return false; |
338 | ||
339 | n->base_addr = n->offset = n->alias_set = n->vuse = NULL_TREE; | |
340 | n->src = src; | |
341 | ||
342 | /* Set up the symbolic number N by setting each byte to a value between 1 and | |
343 | the byte size of rhs1. The highest order byte is set to n->size and the | |
344 | lowest order byte to 1. */ | |
345 | n->type = TREE_TYPE (src); | |
346 | size = TYPE_PRECISION (n->type); | |
347 | if (size % BITS_PER_UNIT != 0) | |
348 | return false; | |
349 | size /= BITS_PER_UNIT; | |
350 | if (size > 64 / BITS_PER_MARKER) | |
351 | return false; | |
352 | n->range = size; | |
353 | n->n = CMPNOP; | |
354 | n->n_ops = 1; | |
355 | ||
356 | if (size < 64 / BITS_PER_MARKER) | |
357 | n->n &= ((uint64_t) 1 << (size * BITS_PER_MARKER)) - 1; | |
358 | ||
359 | return true; | |
360 | } | |
361 | ||
362 | /* Check if STMT might be a byte swap or a nop from a memory source and returns | |
363 | the answer. If so, REF is that memory source and the base of the memory area | |
364 | accessed and the offset of the access from that base are recorded in N. */ | |
365 | ||
366 | bool | |
367 | find_bswap_or_nop_load (gimple *stmt, tree ref, struct symbolic_number *n) | |
368 | { | |
369 | /* Leaf node is an array or component ref. Memorize its base and | |
370 | offset from base to compare to other such leaf node. */ | |
f37fac2b | 371 | poly_int64 bitsize, bitpos, bytepos; |
dffec8eb JJ |
372 | machine_mode mode; |
373 | int unsignedp, reversep, volatilep; | |
374 | tree offset, base_addr; | |
375 | ||
376 | /* Not prepared to handle PDP endian. */ | |
377 | if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN) | |
378 | return false; | |
379 | ||
380 | if (!gimple_assign_load_p (stmt) || gimple_has_volatile_ops (stmt)) | |
381 | return false; | |
382 | ||
383 | base_addr = get_inner_reference (ref, &bitsize, &bitpos, &offset, &mode, | |
384 | &unsignedp, &reversep, &volatilep); | |
385 | ||
4b84d9b8 JJ |
386 | if (TREE_CODE (base_addr) == TARGET_MEM_REF) |
387 | /* Do not rewrite TARGET_MEM_REF. */ | |
388 | return false; | |
389 | else if (TREE_CODE (base_addr) == MEM_REF) | |
dffec8eb | 390 | { |
3fed2ce9 | 391 | poly_offset_int bit_offset = 0; |
dffec8eb JJ |
392 | tree off = TREE_OPERAND (base_addr, 1); |
393 | ||
394 | if (!integer_zerop (off)) | |
395 | { | |
3fed2ce9 RS |
396 | poly_offset_int boff = mem_ref_offset (base_addr); |
397 | boff <<= LOG2_BITS_PER_UNIT; | |
dffec8eb JJ |
398 | bit_offset += boff; |
399 | } | |
400 | ||
401 | base_addr = TREE_OPERAND (base_addr, 0); | |
402 | ||
403 | /* Avoid returning a negative bitpos as this may wreak havoc later. */ | |
3fed2ce9 | 404 | if (maybe_lt (bit_offset, 0)) |
dffec8eb | 405 | { |
3fed2ce9 RS |
406 | tree byte_offset = wide_int_to_tree |
407 | (sizetype, bits_to_bytes_round_down (bit_offset)); | |
408 | bit_offset = num_trailing_bits (bit_offset); | |
dffec8eb | 409 | if (offset) |
3fed2ce9 | 410 | offset = size_binop (PLUS_EXPR, offset, byte_offset); |
dffec8eb | 411 | else |
3fed2ce9 | 412 | offset = byte_offset; |
dffec8eb JJ |
413 | } |
414 | ||
3fed2ce9 | 415 | bitpos += bit_offset.force_shwi (); |
dffec8eb | 416 | } |
4b84d9b8 JJ |
417 | else |
418 | base_addr = build_fold_addr_expr (base_addr); | |
dffec8eb | 419 | |
f37fac2b | 420 | if (!multiple_p (bitpos, BITS_PER_UNIT, &bytepos)) |
dffec8eb | 421 | return false; |
f37fac2b | 422 | if (!multiple_p (bitsize, BITS_PER_UNIT)) |
dffec8eb JJ |
423 | return false; |
424 | if (reversep) | |
425 | return false; | |
426 | ||
427 | if (!init_symbolic_number (n, ref)) | |
428 | return false; | |
429 | n->base_addr = base_addr; | |
430 | n->offset = offset; | |
f37fac2b | 431 | n->bytepos = bytepos; |
dffec8eb JJ |
432 | n->alias_set = reference_alias_ptr_type (ref); |
433 | n->vuse = gimple_vuse (stmt); | |
434 | return true; | |
435 | } | |
436 | ||
04eccbbe JJ |
437 | /* Compute the symbolic number N representing the result of a bitwise OR, |
438 | bitwise XOR or plus on 2 symbolic number N1 and N2 whose source statements | |
439 | are respectively SOURCE_STMT1 and SOURCE_STMT2. CODE is the operation. */ | |
dffec8eb JJ |
440 | |
441 | gimple * | |
442 | perform_symbolic_merge (gimple *source_stmt1, struct symbolic_number *n1, | |
443 | gimple *source_stmt2, struct symbolic_number *n2, | |
04eccbbe | 444 | struct symbolic_number *n, enum tree_code code) |
dffec8eb JJ |
445 | { |
446 | int i, size; | |
447 | uint64_t mask; | |
448 | gimple *source_stmt; | |
449 | struct symbolic_number *n_start; | |
450 | ||
451 | tree rhs1 = gimple_assign_rhs1 (source_stmt1); | |
452 | if (TREE_CODE (rhs1) == BIT_FIELD_REF | |
453 | && TREE_CODE (TREE_OPERAND (rhs1, 0)) == SSA_NAME) | |
454 | rhs1 = TREE_OPERAND (rhs1, 0); | |
455 | tree rhs2 = gimple_assign_rhs1 (source_stmt2); | |
456 | if (TREE_CODE (rhs2) == BIT_FIELD_REF | |
457 | && TREE_CODE (TREE_OPERAND (rhs2, 0)) == SSA_NAME) | |
458 | rhs2 = TREE_OPERAND (rhs2, 0); | |
459 | ||
460 | /* Sources are different, cancel bswap if they are not memory location with | |
461 | the same base (array, structure, ...). */ | |
462 | if (rhs1 != rhs2) | |
463 | { | |
464 | uint64_t inc; | |
4a022c70 | 465 | HOST_WIDE_INT start1, start2, start_sub, end_sub, end1, end2, end; |
dffec8eb JJ |
466 | struct symbolic_number *toinc_n_ptr, *n_end; |
467 | basic_block bb1, bb2; | |
468 | ||
469 | if (!n1->base_addr || !n2->base_addr | |
470 | || !operand_equal_p (n1->base_addr, n2->base_addr, 0)) | |
471 | return NULL; | |
472 | ||
473 | if (!n1->offset != !n2->offset | |
474 | || (n1->offset && !operand_equal_p (n1->offset, n2->offset, 0))) | |
475 | return NULL; | |
476 | ||
4a022c70 RS |
477 | start1 = 0; |
478 | if (!(n2->bytepos - n1->bytepos).is_constant (&start2)) | |
479 | return NULL; | |
480 | ||
481 | if (start1 < start2) | |
dffec8eb JJ |
482 | { |
483 | n_start = n1; | |
4a022c70 | 484 | start_sub = start2 - start1; |
dffec8eb JJ |
485 | } |
486 | else | |
487 | { | |
488 | n_start = n2; | |
4a022c70 | 489 | start_sub = start1 - start2; |
dffec8eb JJ |
490 | } |
491 | ||
492 | bb1 = gimple_bb (source_stmt1); | |
493 | bb2 = gimple_bb (source_stmt2); | |
494 | if (dominated_by_p (CDI_DOMINATORS, bb1, bb2)) | |
495 | source_stmt = source_stmt1; | |
496 | else | |
497 | source_stmt = source_stmt2; | |
498 | ||
499 | /* Find the highest address at which a load is performed and | |
500 | compute related info. */ | |
4a022c70 RS |
501 | end1 = start1 + (n1->range - 1); |
502 | end2 = start2 + (n2->range - 1); | |
dffec8eb JJ |
503 | if (end1 < end2) |
504 | { | |
505 | end = end2; | |
506 | end_sub = end2 - end1; | |
507 | } | |
508 | else | |
509 | { | |
510 | end = end1; | |
511 | end_sub = end1 - end2; | |
512 | } | |
513 | n_end = (end2 > end1) ? n2 : n1; | |
514 | ||
515 | /* Find symbolic number whose lsb is the most significant. */ | |
516 | if (BYTES_BIG_ENDIAN) | |
517 | toinc_n_ptr = (n_end == n1) ? n2 : n1; | |
518 | else | |
519 | toinc_n_ptr = (n_start == n1) ? n2 : n1; | |
520 | ||
4a022c70 | 521 | n->range = end - MIN (start1, start2) + 1; |
dffec8eb JJ |
522 | |
523 | /* Check that the range of memory covered can be represented by | |
524 | a symbolic number. */ | |
525 | if (n->range > 64 / BITS_PER_MARKER) | |
526 | return NULL; | |
527 | ||
528 | /* Reinterpret byte marks in symbolic number holding the value of | |
529 | bigger weight according to target endianness. */ | |
530 | inc = BYTES_BIG_ENDIAN ? end_sub : start_sub; | |
531 | size = TYPE_PRECISION (n1->type) / BITS_PER_UNIT; | |
532 | for (i = 0; i < size; i++, inc <<= BITS_PER_MARKER) | |
533 | { | |
534 | unsigned marker | |
535 | = (toinc_n_ptr->n >> (i * BITS_PER_MARKER)) & MARKER_MASK; | |
536 | if (marker && marker != MARKER_BYTE_UNKNOWN) | |
537 | toinc_n_ptr->n += inc; | |
538 | } | |
539 | } | |
540 | else | |
541 | { | |
542 | n->range = n1->range; | |
543 | n_start = n1; | |
544 | source_stmt = source_stmt1; | |
545 | } | |
546 | ||
547 | if (!n1->alias_set | |
548 | || alias_ptr_types_compatible_p (n1->alias_set, n2->alias_set)) | |
549 | n->alias_set = n1->alias_set; | |
550 | else | |
551 | n->alias_set = ptr_type_node; | |
552 | n->vuse = n_start->vuse; | |
553 | n->base_addr = n_start->base_addr; | |
554 | n->offset = n_start->offset; | |
555 | n->src = n_start->src; | |
556 | n->bytepos = n_start->bytepos; | |
557 | n->type = n_start->type; | |
558 | size = TYPE_PRECISION (n->type) / BITS_PER_UNIT; | |
531dae29 | 559 | uint64_t res_n = n1->n | n2->n; |
dffec8eb JJ |
560 | |
561 | for (i = 0, mask = MARKER_MASK; i < size; i++, mask <<= BITS_PER_MARKER) | |
562 | { | |
563 | uint64_t masked1, masked2; | |
564 | ||
565 | masked1 = n1->n & mask; | |
566 | masked2 = n2->n & mask; | |
531dae29 JJ |
567 | /* If at least one byte is 0, all of 0 | x == 0 ^ x == 0 + x == x. */ |
568 | if (masked1 && masked2) | |
569 | { | |
570 | /* + can carry into upper bits, just punt. */ | |
571 | if (code == PLUS_EXPR) | |
572 | return NULL; | |
573 | /* x | x is still x. */ | |
574 | if (code == BIT_IOR_EXPR && masked1 == masked2) | |
575 | continue; | |
576 | if (code == BIT_XOR_EXPR) | |
577 | { | |
578 | /* x ^ x is 0, but MARKER_BYTE_UNKNOWN stands for | |
579 | unknown values and unknown ^ unknown is unknown. */ | |
580 | if (masked1 == masked2 | |
581 | && masked1 != ((uint64_t) MARKER_BYTE_UNKNOWN | |
582 | << i * BITS_PER_MARKER)) | |
583 | { | |
584 | res_n &= ~mask; | |
585 | continue; | |
586 | } | |
587 | } | |
588 | /* Otherwise set the byte to unknown, it might still be | |
589 | later masked off. */ | |
590 | res_n |= mask; | |
591 | } | |
dffec8eb | 592 | } |
531dae29 | 593 | n->n = res_n; |
dffec8eb JJ |
594 | n->n_ops = n1->n_ops + n2->n_ops; |
595 | ||
596 | return source_stmt; | |
597 | } | |
598 | ||
599 | /* find_bswap_or_nop_1 invokes itself recursively with N and tries to perform | |
600 | the operation given by the rhs of STMT on the result. If the operation | |
601 | could successfully be executed the function returns a gimple stmt whose | |
602 | rhs's first tree is the expression of the source operand and NULL | |
603 | otherwise. */ | |
604 | ||
605 | gimple * | |
606 | find_bswap_or_nop_1 (gimple *stmt, struct symbolic_number *n, int limit) | |
607 | { | |
608 | enum tree_code code; | |
609 | tree rhs1, rhs2 = NULL; | |
610 | gimple *rhs1_stmt, *rhs2_stmt, *source_stmt1; | |
611 | enum gimple_rhs_class rhs_class; | |
612 | ||
613 | if (!limit || !is_gimple_assign (stmt)) | |
614 | return NULL; | |
615 | ||
616 | rhs1 = gimple_assign_rhs1 (stmt); | |
617 | ||
618 | if (find_bswap_or_nop_load (stmt, rhs1, n)) | |
619 | return stmt; | |
620 | ||
621 | /* Handle BIT_FIELD_REF. */ | |
622 | if (TREE_CODE (rhs1) == BIT_FIELD_REF | |
623 | && TREE_CODE (TREE_OPERAND (rhs1, 0)) == SSA_NAME) | |
624 | { | |
35cf3c55 KZ |
625 | if (!tree_fits_uhwi_p (TREE_OPERAND (rhs1, 1)) |
626 | || !tree_fits_uhwi_p (TREE_OPERAND (rhs1, 2))) | |
627 | return NULL; | |
628 | ||
dffec8eb JJ |
629 | unsigned HOST_WIDE_INT bitsize = tree_to_uhwi (TREE_OPERAND (rhs1, 1)); |
630 | unsigned HOST_WIDE_INT bitpos = tree_to_uhwi (TREE_OPERAND (rhs1, 2)); | |
631 | if (bitpos % BITS_PER_UNIT == 0 | |
632 | && bitsize % BITS_PER_UNIT == 0 | |
633 | && init_symbolic_number (n, TREE_OPERAND (rhs1, 0))) | |
634 | { | |
635 | /* Handle big-endian bit numbering in BIT_FIELD_REF. */ | |
636 | if (BYTES_BIG_ENDIAN) | |
637 | bitpos = TYPE_PRECISION (n->type) - bitpos - bitsize; | |
638 | ||
639 | /* Shift. */ | |
640 | if (!do_shift_rotate (RSHIFT_EXPR, n, bitpos)) | |
641 | return NULL; | |
642 | ||
643 | /* Mask. */ | |
644 | uint64_t mask = 0; | |
645 | uint64_t tmp = (1 << BITS_PER_UNIT) - 1; | |
646 | for (unsigned i = 0; i < bitsize / BITS_PER_UNIT; | |
647 | i++, tmp <<= BITS_PER_UNIT) | |
648 | mask |= (uint64_t) MARKER_MASK << (i * BITS_PER_MARKER); | |
649 | n->n &= mask; | |
650 | ||
651 | /* Convert. */ | |
652 | n->type = TREE_TYPE (rhs1); | |
653 | if (!n->base_addr) | |
654 | n->range = TYPE_PRECISION (n->type) / BITS_PER_UNIT; | |
655 | ||
656 | return verify_symbolic_number_p (n, stmt) ? stmt : NULL; | |
657 | } | |
658 | ||
659 | return NULL; | |
660 | } | |
661 | ||
662 | if (TREE_CODE (rhs1) != SSA_NAME) | |
663 | return NULL; | |
664 | ||
665 | code = gimple_assign_rhs_code (stmt); | |
666 | rhs_class = gimple_assign_rhs_class (stmt); | |
667 | rhs1_stmt = SSA_NAME_DEF_STMT (rhs1); | |
668 | ||
669 | if (rhs_class == GIMPLE_BINARY_RHS) | |
670 | rhs2 = gimple_assign_rhs2 (stmt); | |
671 | ||
672 | /* Handle unary rhs and binary rhs with integer constants as second | |
673 | operand. */ | |
674 | ||
675 | if (rhs_class == GIMPLE_UNARY_RHS | |
676 | || (rhs_class == GIMPLE_BINARY_RHS | |
677 | && TREE_CODE (rhs2) == INTEGER_CST)) | |
678 | { | |
679 | if (code != BIT_AND_EXPR | |
680 | && code != LSHIFT_EXPR | |
681 | && code != RSHIFT_EXPR | |
682 | && code != LROTATE_EXPR | |
683 | && code != RROTATE_EXPR | |
684 | && !CONVERT_EXPR_CODE_P (code)) | |
685 | return NULL; | |
686 | ||
687 | source_stmt1 = find_bswap_or_nop_1 (rhs1_stmt, n, limit - 1); | |
688 | ||
689 | /* If find_bswap_or_nop_1 returned NULL, STMT is a leaf node and | |
690 | we have to initialize the symbolic number. */ | |
691 | if (!source_stmt1) | |
692 | { | |
693 | if (gimple_assign_load_p (stmt) | |
694 | || !init_symbolic_number (n, rhs1)) | |
695 | return NULL; | |
696 | source_stmt1 = stmt; | |
697 | } | |
698 | ||
699 | switch (code) | |
700 | { | |
701 | case BIT_AND_EXPR: | |
702 | { | |
703 | int i, size = TYPE_PRECISION (n->type) / BITS_PER_UNIT; | |
704 | uint64_t val = int_cst_value (rhs2), mask = 0; | |
705 | uint64_t tmp = (1 << BITS_PER_UNIT) - 1; | |
706 | ||
707 | /* Only constants masking full bytes are allowed. */ | |
708 | for (i = 0; i < size; i++, tmp <<= BITS_PER_UNIT) | |
709 | if ((val & tmp) != 0 && (val & tmp) != tmp) | |
710 | return NULL; | |
711 | else if (val & tmp) | |
712 | mask |= (uint64_t) MARKER_MASK << (i * BITS_PER_MARKER); | |
713 | ||
714 | n->n &= mask; | |
715 | } | |
716 | break; | |
717 | case LSHIFT_EXPR: | |
718 | case RSHIFT_EXPR: | |
719 | case LROTATE_EXPR: | |
720 | case RROTATE_EXPR: | |
721 | if (!do_shift_rotate (code, n, (int) TREE_INT_CST_LOW (rhs2))) | |
722 | return NULL; | |
723 | break; | |
724 | CASE_CONVERT: | |
725 | { | |
726 | int i, type_size, old_type_size; | |
727 | tree type; | |
728 | ||
650c70a9 | 729 | type = TREE_TYPE (gimple_assign_lhs (stmt)); |
dffec8eb JJ |
730 | type_size = TYPE_PRECISION (type); |
731 | if (type_size % BITS_PER_UNIT != 0) | |
732 | return NULL; | |
733 | type_size /= BITS_PER_UNIT; | |
734 | if (type_size > 64 / BITS_PER_MARKER) | |
735 | return NULL; | |
736 | ||
737 | /* Sign extension: result is dependent on the value. */ | |
738 | old_type_size = TYPE_PRECISION (n->type) / BITS_PER_UNIT; | |
739 | if (!TYPE_UNSIGNED (n->type) && type_size > old_type_size | |
740 | && HEAD_MARKER (n->n, old_type_size)) | |
741 | for (i = 0; i < type_size - old_type_size; i++) | |
742 | n->n |= (uint64_t) MARKER_BYTE_UNKNOWN | |
743 | << ((type_size - 1 - i) * BITS_PER_MARKER); | |
744 | ||
745 | if (type_size < 64 / BITS_PER_MARKER) | |
746 | { | |
747 | /* If STMT casts to a smaller type mask out the bits not | |
748 | belonging to the target type. */ | |
749 | n->n &= ((uint64_t) 1 << (type_size * BITS_PER_MARKER)) - 1; | |
750 | } | |
751 | n->type = type; | |
752 | if (!n->base_addr) | |
753 | n->range = type_size; | |
754 | } | |
755 | break; | |
756 | default: | |
757 | return NULL; | |
758 | }; | |
759 | return verify_symbolic_number_p (n, stmt) ? source_stmt1 : NULL; | |
760 | } | |
761 | ||
762 | /* Handle binary rhs. */ | |
763 | ||
764 | if (rhs_class == GIMPLE_BINARY_RHS) | |
765 | { | |
766 | struct symbolic_number n1, n2; | |
767 | gimple *source_stmt, *source_stmt2; | |
768 | ||
a944b5de | 769 | if (!rhs2 || TREE_CODE (rhs2) != SSA_NAME) |
dffec8eb JJ |
770 | return NULL; |
771 | ||
772 | rhs2_stmt = SSA_NAME_DEF_STMT (rhs2); | |
773 | ||
774 | switch (code) | |
775 | { | |
776 | case BIT_IOR_EXPR: | |
a944b5de RS |
777 | case BIT_XOR_EXPR: |
778 | case PLUS_EXPR: | |
dffec8eb JJ |
779 | source_stmt1 = find_bswap_or_nop_1 (rhs1_stmt, &n1, limit - 1); |
780 | ||
781 | if (!source_stmt1) | |
782 | return NULL; | |
783 | ||
784 | source_stmt2 = find_bswap_or_nop_1 (rhs2_stmt, &n2, limit - 1); | |
785 | ||
786 | if (!source_stmt2) | |
787 | return NULL; | |
788 | ||
789 | if (TYPE_PRECISION (n1.type) != TYPE_PRECISION (n2.type)) | |
790 | return NULL; | |
791 | ||
4b84d9b8 | 792 | if (n1.vuse != n2.vuse) |
dffec8eb JJ |
793 | return NULL; |
794 | ||
795 | source_stmt | |
04eccbbe JJ |
796 | = perform_symbolic_merge (source_stmt1, &n1, source_stmt2, &n2, n, |
797 | code); | |
dffec8eb JJ |
798 | |
799 | if (!source_stmt) | |
800 | return NULL; | |
801 | ||
802 | if (!verify_symbolic_number_p (n, stmt)) | |
803 | return NULL; | |
804 | ||
805 | break; | |
806 | default: | |
807 | return NULL; | |
808 | } | |
809 | return source_stmt; | |
810 | } | |
811 | return NULL; | |
812 | } | |
813 | ||
4b84d9b8 JJ |
814 | /* Helper for find_bswap_or_nop and try_coalesce_bswap to compute |
815 | *CMPXCHG, *CMPNOP and adjust *N. */ | |
dffec8eb | 816 | |
4b84d9b8 JJ |
817 | void |
818 | find_bswap_or_nop_finalize (struct symbolic_number *n, uint64_t *cmpxchg, | |
b320edc0 | 819 | uint64_t *cmpnop, bool *cast64_to_32) |
dffec8eb JJ |
820 | { |
821 | unsigned rsize; | |
822 | uint64_t tmpn, mask; | |
dffec8eb | 823 | |
4b84d9b8 JJ |
824 | /* The number which the find_bswap_or_nop_1 result should match in order |
825 | to have a full byte swap. The number is shifted to the right | |
826 | according to the size of the symbolic number before using it. */ | |
827 | *cmpxchg = CMPXCHG; | |
828 | *cmpnop = CMPNOP; | |
b320edc0 | 829 | *cast64_to_32 = false; |
dffec8eb JJ |
830 | |
831 | /* Find real size of result (highest non-zero byte). */ | |
832 | if (n->base_addr) | |
833 | for (tmpn = n->n, rsize = 0; tmpn; tmpn >>= BITS_PER_MARKER, rsize++); | |
834 | else | |
835 | rsize = n->range; | |
836 | ||
837 | /* Zero out the bits corresponding to untouched bytes in original gimple | |
838 | expression. */ | |
839 | if (n->range < (int) sizeof (int64_t)) | |
840 | { | |
841 | mask = ((uint64_t) 1 << (n->range * BITS_PER_MARKER)) - 1; | |
b320edc0 JJ |
842 | if (n->base_addr == NULL |
843 | && n->range == 4 | |
844 | && int_size_in_bytes (TREE_TYPE (n->src)) == 8) | |
845 | { | |
846 | /* If all bytes in n->n are either 0 or in [5..8] range, this | |
847 | might be a candidate for (unsigned) __builtin_bswap64 (src). | |
848 | It is not worth it for (unsigned short) __builtin_bswap64 (src) | |
849 | or (unsigned short) __builtin_bswap32 (src). */ | |
850 | *cast64_to_32 = true; | |
851 | for (tmpn = n->n; tmpn; tmpn >>= BITS_PER_MARKER) | |
852 | if ((tmpn & MARKER_MASK) | |
853 | && ((tmpn & MARKER_MASK) <= 4 || (tmpn & MARKER_MASK) > 8)) | |
854 | { | |
855 | *cast64_to_32 = false; | |
856 | break; | |
857 | } | |
858 | } | |
859 | if (*cast64_to_32) | |
860 | *cmpxchg &= mask; | |
861 | else | |
862 | *cmpxchg >>= (64 / BITS_PER_MARKER - n->range) * BITS_PER_MARKER; | |
4b84d9b8 | 863 | *cmpnop &= mask; |
dffec8eb JJ |
864 | } |
865 | ||
866 | /* Zero out the bits corresponding to unused bytes in the result of the | |
867 | gimple expression. */ | |
868 | if (rsize < n->range) | |
869 | { | |
870 | if (BYTES_BIG_ENDIAN) | |
871 | { | |
872 | mask = ((uint64_t) 1 << (rsize * BITS_PER_MARKER)) - 1; | |
4b84d9b8 | 873 | *cmpxchg &= mask; |
567d5f3d JJ |
874 | if (n->range - rsize == sizeof (int64_t)) |
875 | *cmpnop = 0; | |
876 | else | |
877 | *cmpnop >>= (n->range - rsize) * BITS_PER_MARKER; | |
dffec8eb JJ |
878 | } |
879 | else | |
880 | { | |
881 | mask = ((uint64_t) 1 << (rsize * BITS_PER_MARKER)) - 1; | |
567d5f3d JJ |
882 | if (n->range - rsize == sizeof (int64_t)) |
883 | *cmpxchg = 0; | |
884 | else | |
885 | *cmpxchg >>= (n->range - rsize) * BITS_PER_MARKER; | |
4b84d9b8 | 886 | *cmpnop &= mask; |
dffec8eb JJ |
887 | } |
888 | n->range = rsize; | |
889 | } | |
890 | ||
b320edc0 JJ |
891 | if (*cast64_to_32) |
892 | n->range = 8; | |
4b84d9b8 JJ |
893 | n->range *= BITS_PER_UNIT; |
894 | } | |
895 | ||
896 | /* Check if STMT completes a bswap implementation or a read in a given | |
897 | endianness consisting of ORs, SHIFTs and ANDs and sets *BSWAP | |
898 | accordingly. It also sets N to represent the kind of operations | |
899 | performed: size of the resulting expression and whether it works on | |
900 | a memory source, and if so alias-set and vuse. At last, the | |
901 | function returns a stmt whose rhs's first tree is the source | |
902 | expression. */ | |
903 | ||
904 | gimple * | |
b320edc0 JJ |
905 | find_bswap_or_nop (gimple *stmt, struct symbolic_number *n, bool *bswap, |
906 | bool *cast64_to_32, uint64_t *mask) | |
4b84d9b8 | 907 | { |
650c70a9 | 908 | tree type_size = TYPE_SIZE_UNIT (TREE_TYPE (gimple_get_lhs (stmt))); |
7f0ce82a KT |
909 | if (!tree_fits_uhwi_p (type_size)) |
910 | return NULL; | |
911 | ||
4b84d9b8 JJ |
912 | /* The last parameter determines the depth search limit. It usually |
913 | correlates directly to the number n of bytes to be touched. We | |
0f507a36 | 914 | increase that number by 2 * (log2(n) + 1) here in order to also |
4b84d9b8 JJ |
915 | cover signed -> unsigned conversions of the src operand as can be seen |
916 | in libgcc, and for initial shift/and operation of the src operand. */ | |
7f0ce82a | 917 | int limit = tree_to_uhwi (type_size); |
0f507a36 | 918 | limit += 2 * (1 + (int) ceil_log2 ((unsigned HOST_WIDE_INT) limit)); |
4b84d9b8 JJ |
919 | gimple *ins_stmt = find_bswap_or_nop_1 (stmt, n, limit); |
920 | ||
921 | if (!ins_stmt) | |
cd676dfa JJ |
922 | { |
923 | if (gimple_assign_rhs_code (stmt) != CONSTRUCTOR | |
924 | || BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN) | |
925 | return NULL; | |
926 | unsigned HOST_WIDE_INT sz = tree_to_uhwi (type_size) * BITS_PER_UNIT; | |
927 | if (sz != 16 && sz != 32 && sz != 64) | |
928 | return NULL; | |
929 | tree rhs = gimple_assign_rhs1 (stmt); | |
9032d2b2 JJ |
930 | if (CONSTRUCTOR_NELTS (rhs) == 0) |
931 | return NULL; | |
cd676dfa JJ |
932 | tree eltype = TREE_TYPE (TREE_TYPE (rhs)); |
933 | unsigned HOST_WIDE_INT eltsz | |
934 | = int_size_in_bytes (eltype) * BITS_PER_UNIT; | |
935 | if (TYPE_PRECISION (eltype) != eltsz) | |
936 | return NULL; | |
937 | constructor_elt *elt; | |
938 | unsigned int i; | |
939 | tree type = build_nonstandard_integer_type (sz, 1); | |
940 | FOR_EACH_VEC_SAFE_ELT (CONSTRUCTOR_ELTS (rhs), i, elt) | |
941 | { | |
942 | if (TREE_CODE (elt->value) != SSA_NAME | |
943 | || !INTEGRAL_TYPE_P (TREE_TYPE (elt->value))) | |
944 | return NULL; | |
945 | struct symbolic_number n1; | |
946 | gimple *source_stmt | |
947 | = find_bswap_or_nop_1 (SSA_NAME_DEF_STMT (elt->value), &n1, | |
948 | limit - 1); | |
949 | ||
950 | if (!source_stmt) | |
951 | return NULL; | |
952 | ||
953 | n1.type = type; | |
954 | if (!n1.base_addr) | |
955 | n1.range = sz / BITS_PER_UNIT; | |
956 | ||
957 | if (i == 0) | |
958 | { | |
959 | ins_stmt = source_stmt; | |
960 | *n = n1; | |
961 | } | |
962 | else | |
963 | { | |
964 | if (n->vuse != n1.vuse) | |
965 | return NULL; | |
966 | ||
967 | struct symbolic_number n0 = *n; | |
968 | ||
969 | if (!BYTES_BIG_ENDIAN) | |
970 | { | |
971 | if (!do_shift_rotate (LSHIFT_EXPR, &n1, i * eltsz)) | |
972 | return NULL; | |
973 | } | |
974 | else if (!do_shift_rotate (LSHIFT_EXPR, &n0, eltsz)) | |
975 | return NULL; | |
976 | ins_stmt | |
04eccbbe JJ |
977 | = perform_symbolic_merge (ins_stmt, &n0, source_stmt, &n1, n, |
978 | BIT_IOR_EXPR); | |
cd676dfa JJ |
979 | |
980 | if (!ins_stmt) | |
981 | return NULL; | |
982 | } | |
983 | } | |
984 | } | |
4b84d9b8 JJ |
985 | |
986 | uint64_t cmpxchg, cmpnop; | |
b320edc0 | 987 | find_bswap_or_nop_finalize (n, &cmpxchg, &cmpnop, cast64_to_32); |
4b84d9b8 | 988 | |
dffec8eb JJ |
989 | /* A complete byte swap should make the symbolic number to start with |
990 | the largest digit in the highest order byte. Unchanged symbolic | |
991 | number indicates a read with same endianness as target architecture. */ | |
b320edc0 | 992 | *mask = ~(uint64_t) 0; |
dffec8eb JJ |
993 | if (n->n == cmpnop) |
994 | *bswap = false; | |
995 | else if (n->n == cmpxchg) | |
996 | *bswap = true; | |
997 | else | |
b320edc0 JJ |
998 | { |
999 | int set = 0; | |
1000 | for (uint64_t msk = MARKER_MASK; msk; msk <<= BITS_PER_MARKER) | |
1001 | if ((n->n & msk) == 0) | |
1002 | *mask &= ~msk; | |
1003 | else if ((n->n & msk) == (cmpxchg & msk)) | |
1004 | set++; | |
1005 | else | |
1006 | return NULL; | |
1007 | if (set < 2) | |
1008 | return NULL; | |
1009 | *bswap = true; | |
1010 | } | |
dffec8eb JJ |
1011 | |
1012 | /* Useless bit manipulation performed by code. */ | |
1013 | if (!n->base_addr && n->n == cmpnop && n->n_ops == 1) | |
1014 | return NULL; | |
1015 | ||
dffec8eb JJ |
1016 | return ins_stmt; |
1017 | } | |
1018 | ||
1019 | const pass_data pass_data_optimize_bswap = | |
1020 | { | |
1021 | GIMPLE_PASS, /* type */ | |
1022 | "bswap", /* name */ | |
1023 | OPTGROUP_NONE, /* optinfo_flags */ | |
1024 | TV_NONE, /* tv_id */ | |
1025 | PROP_ssa, /* properties_required */ | |
1026 | 0, /* properties_provided */ | |
1027 | 0, /* properties_destroyed */ | |
1028 | 0, /* todo_flags_start */ | |
1029 | 0, /* todo_flags_finish */ | |
1030 | }; | |
1031 | ||
1032 | class pass_optimize_bswap : public gimple_opt_pass | |
1033 | { | |
1034 | public: | |
1035 | pass_optimize_bswap (gcc::context *ctxt) | |
1036 | : gimple_opt_pass (pass_data_optimize_bswap, ctxt) | |
1037 | {} | |
1038 | ||
1039 | /* opt_pass methods: */ | |
1040 | virtual bool gate (function *) | |
1041 | { | |
1042 | return flag_expensive_optimizations && optimize && BITS_PER_UNIT == 8; | |
1043 | } | |
1044 | ||
1045 | virtual unsigned int execute (function *); | |
1046 | ||
1047 | }; // class pass_optimize_bswap | |
1048 | ||
d02a8b63 JJ |
1049 | /* Helper function for bswap_replace. Build VIEW_CONVERT_EXPR from |
1050 | VAL to TYPE. If VAL has different type size, emit a NOP_EXPR cast | |
1051 | first. */ | |
1052 | ||
1053 | static tree | |
45ff1251 JJ |
1054 | bswap_view_convert (gimple_stmt_iterator *gsi, tree type, tree val, |
1055 | bool before) | |
d02a8b63 | 1056 | { |
a4001578 JJ |
1057 | gcc_assert (INTEGRAL_TYPE_P (TREE_TYPE (val)) |
1058 | || POINTER_TYPE_P (TREE_TYPE (val))); | |
d02a8b63 JJ |
1059 | if (TYPE_SIZE (type) != TYPE_SIZE (TREE_TYPE (val))) |
1060 | { | |
1061 | HOST_WIDE_INT prec = TREE_INT_CST_LOW (TYPE_SIZE (type)); | |
a4001578 JJ |
1062 | if (POINTER_TYPE_P (TREE_TYPE (val))) |
1063 | { | |
1064 | gimple *g | |
1065 | = gimple_build_assign (make_ssa_name (pointer_sized_int_node), | |
1066 | NOP_EXPR, val); | |
45ff1251 JJ |
1067 | if (before) |
1068 | gsi_insert_before (gsi, g, GSI_SAME_STMT); | |
1069 | else | |
1070 | gsi_insert_after (gsi, g, GSI_NEW_STMT); | |
a4001578 JJ |
1071 | val = gimple_assign_lhs (g); |
1072 | } | |
d02a8b63 JJ |
1073 | tree itype = build_nonstandard_integer_type (prec, 1); |
1074 | gimple *g = gimple_build_assign (make_ssa_name (itype), NOP_EXPR, val); | |
45ff1251 JJ |
1075 | if (before) |
1076 | gsi_insert_before (gsi, g, GSI_SAME_STMT); | |
1077 | else | |
1078 | gsi_insert_after (gsi, g, GSI_NEW_STMT); | |
d02a8b63 JJ |
1079 | val = gimple_assign_lhs (g); |
1080 | } | |
1081 | return build1 (VIEW_CONVERT_EXPR, type, val); | |
1082 | } | |
1083 | ||
dffec8eb | 1084 | /* Perform the bswap optimization: replace the expression computed in the rhs |
4b84d9b8 JJ |
1085 | of gsi_stmt (GSI) (or if NULL add instead of replace) by an equivalent |
1086 | bswap, load or load + bswap expression. | |
dffec8eb JJ |
1087 | Which of these alternatives replace the rhs is given by N->base_addr (non |
1088 | null if a load is needed) and BSWAP. The type, VUSE and set-alias of the | |
1089 | load to perform are also given in N while the builtin bswap invoke is given | |
4b84d9b8 JJ |
1090 | in FNDEL. Finally, if a load is involved, INS_STMT refers to one of the |
1091 | load statements involved to construct the rhs in gsi_stmt (GSI) and | |
1092 | N->range gives the size of the rhs expression for maintaining some | |
1093 | statistics. | |
dffec8eb | 1094 | |
4b84d9b8 JJ |
1095 | Note that if the replacement involve a load and if gsi_stmt (GSI) is |
1096 | non-NULL, that stmt is moved just after INS_STMT to do the load with the | |
1097 | same VUSE which can lead to gsi_stmt (GSI) changing of basic block. */ | |
dffec8eb | 1098 | |
4b84d9b8 JJ |
1099 | tree |
1100 | bswap_replace (gimple_stmt_iterator gsi, gimple *ins_stmt, tree fndecl, | |
dffec8eb | 1101 | tree bswap_type, tree load_type, struct symbolic_number *n, |
b320edc0 | 1102 | bool bswap, uint64_t mask) |
dffec8eb | 1103 | { |
4b84d9b8 | 1104 | tree src, tmp, tgt = NULL_TREE; |
b320edc0 | 1105 | gimple *bswap_stmt, *mask_stmt = NULL; |
cd676dfa | 1106 | tree_code conv_code = NOP_EXPR; |
dffec8eb | 1107 | |
4b84d9b8 | 1108 | gimple *cur_stmt = gsi_stmt (gsi); |
dffec8eb | 1109 | src = n->src; |
4b84d9b8 | 1110 | if (cur_stmt) |
cd676dfa JJ |
1111 | { |
1112 | tgt = gimple_assign_lhs (cur_stmt); | |
1113 | if (gimple_assign_rhs_code (cur_stmt) == CONSTRUCTOR | |
1114 | && tgt | |
1115 | && VECTOR_TYPE_P (TREE_TYPE (tgt))) | |
1116 | conv_code = VIEW_CONVERT_EXPR; | |
1117 | } | |
dffec8eb JJ |
1118 | |
1119 | /* Need to load the value from memory first. */ | |
1120 | if (n->base_addr) | |
1121 | { | |
4b84d9b8 JJ |
1122 | gimple_stmt_iterator gsi_ins = gsi; |
1123 | if (ins_stmt) | |
1124 | gsi_ins = gsi_for_stmt (ins_stmt); | |
dffec8eb JJ |
1125 | tree addr_expr, addr_tmp, val_expr, val_tmp; |
1126 | tree load_offset_ptr, aligned_load_type; | |
4b84d9b8 JJ |
1127 | gimple *load_stmt; |
1128 | unsigned align = get_object_alignment (src); | |
4a022c70 | 1129 | poly_int64 load_offset = 0; |
dffec8eb | 1130 | |
4b84d9b8 JJ |
1131 | if (cur_stmt) |
1132 | { | |
1133 | basic_block ins_bb = gimple_bb (ins_stmt); | |
1134 | basic_block cur_bb = gimple_bb (cur_stmt); | |
1135 | if (!dominated_by_p (CDI_DOMINATORS, cur_bb, ins_bb)) | |
1136 | return NULL_TREE; | |
1137 | ||
1138 | /* Move cur_stmt just before one of the load of the original | |
1139 | to ensure it has the same VUSE. See PR61517 for what could | |
1140 | go wrong. */ | |
1141 | if (gimple_bb (cur_stmt) != gimple_bb (ins_stmt)) | |
1142 | reset_flow_sensitive_info (gimple_assign_lhs (cur_stmt)); | |
1143 | gsi_move_before (&gsi, &gsi_ins); | |
1144 | gsi = gsi_for_stmt (cur_stmt); | |
1145 | } | |
1146 | else | |
1147 | gsi = gsi_ins; | |
dffec8eb JJ |
1148 | |
1149 | /* Compute address to load from and cast according to the size | |
1150 | of the load. */ | |
4b84d9b8 | 1151 | addr_expr = build_fold_addr_expr (src); |
dffec8eb | 1152 | if (is_gimple_mem_ref_addr (addr_expr)) |
4b84d9b8 | 1153 | addr_tmp = unshare_expr (addr_expr); |
dffec8eb JJ |
1154 | else |
1155 | { | |
4b84d9b8 JJ |
1156 | addr_tmp = unshare_expr (n->base_addr); |
1157 | if (!is_gimple_mem_ref_addr (addr_tmp)) | |
1158 | addr_tmp = force_gimple_operand_gsi_1 (&gsi, addr_tmp, | |
1159 | is_gimple_mem_ref_addr, | |
1160 | NULL_TREE, true, | |
1161 | GSI_SAME_STMT); | |
1162 | load_offset = n->bytepos; | |
1163 | if (n->offset) | |
1164 | { | |
1165 | tree off | |
1166 | = force_gimple_operand_gsi (&gsi, unshare_expr (n->offset), | |
1167 | true, NULL_TREE, true, | |
1168 | GSI_SAME_STMT); | |
1169 | gimple *stmt | |
1170 | = gimple_build_assign (make_ssa_name (TREE_TYPE (addr_tmp)), | |
1171 | POINTER_PLUS_EXPR, addr_tmp, off); | |
1172 | gsi_insert_before (&gsi, stmt, GSI_SAME_STMT); | |
1173 | addr_tmp = gimple_assign_lhs (stmt); | |
1174 | } | |
dffec8eb JJ |
1175 | } |
1176 | ||
1177 | /* Perform the load. */ | |
1178 | aligned_load_type = load_type; | |
1179 | if (align < TYPE_ALIGN (load_type)) | |
1180 | aligned_load_type = build_aligned_type (load_type, align); | |
1181 | load_offset_ptr = build_int_cst (n->alias_set, load_offset); | |
1182 | val_expr = fold_build2 (MEM_REF, aligned_load_type, addr_tmp, | |
1183 | load_offset_ptr); | |
1184 | ||
1185 | if (!bswap) | |
1186 | { | |
1187 | if (n->range == 16) | |
1188 | nop_stats.found_16bit++; | |
1189 | else if (n->range == 32) | |
1190 | nop_stats.found_32bit++; | |
1191 | else | |
1192 | { | |
1193 | gcc_assert (n->range == 64); | |
1194 | nop_stats.found_64bit++; | |
1195 | } | |
1196 | ||
1197 | /* Convert the result of load if necessary. */ | |
4b84d9b8 | 1198 | if (tgt && !useless_type_conversion_p (TREE_TYPE (tgt), load_type)) |
dffec8eb JJ |
1199 | { |
1200 | val_tmp = make_temp_ssa_name (aligned_load_type, NULL, | |
1201 | "load_dst"); | |
1202 | load_stmt = gimple_build_assign (val_tmp, val_expr); | |
1203 | gimple_set_vuse (load_stmt, n->vuse); | |
1204 | gsi_insert_before (&gsi, load_stmt, GSI_SAME_STMT); | |
cd676dfa | 1205 | if (conv_code == VIEW_CONVERT_EXPR) |
45ff1251 JJ |
1206 | val_tmp = bswap_view_convert (&gsi, TREE_TYPE (tgt), val_tmp, |
1207 | true); | |
cd676dfa | 1208 | gimple_assign_set_rhs_with_ops (&gsi, conv_code, val_tmp); |
4b84d9b8 | 1209 | update_stmt (cur_stmt); |
dffec8eb | 1210 | } |
4b84d9b8 | 1211 | else if (cur_stmt) |
dffec8eb JJ |
1212 | { |
1213 | gimple_assign_set_rhs_with_ops (&gsi, MEM_REF, val_expr); | |
1214 | gimple_set_vuse (cur_stmt, n->vuse); | |
4b84d9b8 JJ |
1215 | update_stmt (cur_stmt); |
1216 | } | |
1217 | else | |
1218 | { | |
1219 | tgt = make_ssa_name (load_type); | |
1220 | cur_stmt = gimple_build_assign (tgt, MEM_REF, val_expr); | |
1221 | gimple_set_vuse (cur_stmt, n->vuse); | |
1222 | gsi_insert_before (&gsi, cur_stmt, GSI_SAME_STMT); | |
dffec8eb | 1223 | } |
dffec8eb JJ |
1224 | |
1225 | if (dump_file) | |
1226 | { | |
1227 | fprintf (dump_file, | |
1228 | "%d bit load in target endianness found at: ", | |
1229 | (int) n->range); | |
1230 | print_gimple_stmt (dump_file, cur_stmt, 0); | |
1231 | } | |
4b84d9b8 | 1232 | return tgt; |
dffec8eb JJ |
1233 | } |
1234 | else | |
1235 | { | |
1236 | val_tmp = make_temp_ssa_name (aligned_load_type, NULL, "load_dst"); | |
1237 | load_stmt = gimple_build_assign (val_tmp, val_expr); | |
1238 | gimple_set_vuse (load_stmt, n->vuse); | |
1239 | gsi_insert_before (&gsi, load_stmt, GSI_SAME_STMT); | |
1240 | } | |
1241 | src = val_tmp; | |
1242 | } | |
1243 | else if (!bswap) | |
1244 | { | |
4b84d9b8 JJ |
1245 | gimple *g = NULL; |
1246 | if (tgt && !useless_type_conversion_p (TREE_TYPE (tgt), TREE_TYPE (src))) | |
dffec8eb JJ |
1247 | { |
1248 | if (!is_gimple_val (src)) | |
4b84d9b8 | 1249 | return NULL_TREE; |
cd676dfa | 1250 | if (conv_code == VIEW_CONVERT_EXPR) |
45ff1251 | 1251 | src = bswap_view_convert (&gsi, TREE_TYPE (tgt), src, true); |
cd676dfa | 1252 | g = gimple_build_assign (tgt, conv_code, src); |
dffec8eb | 1253 | } |
4b84d9b8 | 1254 | else if (cur_stmt) |
dffec8eb | 1255 | g = gimple_build_assign (tgt, src); |
4b84d9b8 JJ |
1256 | else |
1257 | tgt = src; | |
dffec8eb JJ |
1258 | if (n->range == 16) |
1259 | nop_stats.found_16bit++; | |
1260 | else if (n->range == 32) | |
1261 | nop_stats.found_32bit++; | |
1262 | else | |
1263 | { | |
1264 | gcc_assert (n->range == 64); | |
1265 | nop_stats.found_64bit++; | |
1266 | } | |
1267 | if (dump_file) | |
1268 | { | |
1269 | fprintf (dump_file, | |
1270 | "%d bit reshuffle in target endianness found at: ", | |
1271 | (int) n->range); | |
4b84d9b8 JJ |
1272 | if (cur_stmt) |
1273 | print_gimple_stmt (dump_file, cur_stmt, 0); | |
1274 | else | |
1275 | { | |
4af78ef8 | 1276 | print_generic_expr (dump_file, tgt, TDF_NONE); |
4b84d9b8 JJ |
1277 | fprintf (dump_file, "\n"); |
1278 | } | |
dffec8eb | 1279 | } |
4b84d9b8 JJ |
1280 | if (cur_stmt) |
1281 | gsi_replace (&gsi, g, true); | |
1282 | return tgt; | |
dffec8eb JJ |
1283 | } |
1284 | else if (TREE_CODE (src) == BIT_FIELD_REF) | |
1285 | src = TREE_OPERAND (src, 0); | |
1286 | ||
1287 | if (n->range == 16) | |
1288 | bswap_stats.found_16bit++; | |
1289 | else if (n->range == 32) | |
1290 | bswap_stats.found_32bit++; | |
1291 | else | |
1292 | { | |
1293 | gcc_assert (n->range == 64); | |
1294 | bswap_stats.found_64bit++; | |
1295 | } | |
1296 | ||
1297 | tmp = src; | |
1298 | ||
1299 | /* Convert the src expression if necessary. */ | |
1300 | if (!useless_type_conversion_p (TREE_TYPE (tmp), bswap_type)) | |
1301 | { | |
1302 | gimple *convert_stmt; | |
1303 | ||
1304 | tmp = make_temp_ssa_name (bswap_type, NULL, "bswapsrc"); | |
1305 | convert_stmt = gimple_build_assign (tmp, NOP_EXPR, src); | |
1306 | gsi_insert_before (&gsi, convert_stmt, GSI_SAME_STMT); | |
1307 | } | |
1308 | ||
1309 | /* Canonical form for 16 bit bswap is a rotate expression. Only 16bit values | |
1310 | are considered as rotation of 2N bit values by N bits is generally not | |
1311 | equivalent to a bswap. Consider for instance 0x01020304 r>> 16 which | |
1312 | gives 0x03040102 while a bswap for that value is 0x04030201. */ | |
1313 | if (bswap && n->range == 16) | |
1314 | { | |
1315 | tree count = build_int_cst (NULL, BITS_PER_UNIT); | |
1316 | src = fold_build2 (LROTATE_EXPR, bswap_type, tmp, count); | |
1317 | bswap_stmt = gimple_build_assign (NULL, src); | |
1318 | } | |
1319 | else | |
1320 | bswap_stmt = gimple_build_call (fndecl, 1, tmp); | |
1321 | ||
4b84d9b8 JJ |
1322 | if (tgt == NULL_TREE) |
1323 | tgt = make_ssa_name (bswap_type); | |
dffec8eb JJ |
1324 | tmp = tgt; |
1325 | ||
b320edc0 JJ |
1326 | if (mask != ~(uint64_t) 0) |
1327 | { | |
1328 | tree m = build_int_cst (bswap_type, mask); | |
1329 | tmp = make_temp_ssa_name (bswap_type, NULL, "bswapdst"); | |
1330 | gimple_set_lhs (bswap_stmt, tmp); | |
1331 | mask_stmt = gimple_build_assign (tgt, BIT_AND_EXPR, tmp, m); | |
1332 | tmp = tgt; | |
1333 | } | |
1334 | ||
dffec8eb JJ |
1335 | /* Convert the result if necessary. */ |
1336 | if (!useless_type_conversion_p (TREE_TYPE (tgt), bswap_type)) | |
1337 | { | |
dffec8eb | 1338 | tmp = make_temp_ssa_name (bswap_type, NULL, "bswapdst"); |
cd676dfa | 1339 | tree atmp = tmp; |
45ff1251 | 1340 | gimple_stmt_iterator gsi2 = gsi; |
cd676dfa | 1341 | if (conv_code == VIEW_CONVERT_EXPR) |
45ff1251 JJ |
1342 | atmp = bswap_view_convert (&gsi2, TREE_TYPE (tgt), tmp, false); |
1343 | gimple *convert_stmt = gimple_build_assign (tgt, conv_code, atmp); | |
1344 | gsi_insert_after (&gsi2, convert_stmt, GSI_SAME_STMT); | |
dffec8eb JJ |
1345 | } |
1346 | ||
b320edc0 | 1347 | gimple_set_lhs (mask_stmt ? mask_stmt : bswap_stmt, tmp); |
dffec8eb JJ |
1348 | |
1349 | if (dump_file) | |
1350 | { | |
1351 | fprintf (dump_file, "%d bit bswap implementation found at: ", | |
1352 | (int) n->range); | |
4b84d9b8 JJ |
1353 | if (cur_stmt) |
1354 | print_gimple_stmt (dump_file, cur_stmt, 0); | |
1355 | else | |
1356 | { | |
4af78ef8 | 1357 | print_generic_expr (dump_file, tgt, TDF_NONE); |
4b84d9b8 JJ |
1358 | fprintf (dump_file, "\n"); |
1359 | } | |
dffec8eb JJ |
1360 | } |
1361 | ||
4b84d9b8 JJ |
1362 | if (cur_stmt) |
1363 | { | |
b320edc0 JJ |
1364 | if (mask_stmt) |
1365 | gsi_insert_after (&gsi, mask_stmt, GSI_SAME_STMT); | |
4b84d9b8 JJ |
1366 | gsi_insert_after (&gsi, bswap_stmt, GSI_SAME_STMT); |
1367 | gsi_remove (&gsi, true); | |
1368 | } | |
1369 | else | |
b320edc0 JJ |
1370 | { |
1371 | gsi_insert_before (&gsi, bswap_stmt, GSI_SAME_STMT); | |
1372 | if (mask_stmt) | |
1373 | gsi_insert_before (&gsi, mask_stmt, GSI_SAME_STMT); | |
1374 | } | |
4b84d9b8 | 1375 | return tgt; |
dffec8eb JJ |
1376 | } |
1377 | ||
a7553ad6 JJ |
1378 | /* Try to optimize an assignment CUR_STMT with CONSTRUCTOR on the rhs |
1379 | using bswap optimizations. CDI_DOMINATORS need to be | |
1380 | computed on entry. Return true if it has been optimized and | |
1381 | TODO_update_ssa is needed. */ | |
1382 | ||
1383 | static bool | |
1384 | maybe_optimize_vector_constructor (gimple *cur_stmt) | |
1385 | { | |
1386 | tree fndecl = NULL_TREE, bswap_type = NULL_TREE, load_type; | |
1387 | struct symbolic_number n; | |
1388 | bool bswap; | |
1389 | ||
1390 | gcc_assert (is_gimple_assign (cur_stmt) | |
1391 | && gimple_assign_rhs_code (cur_stmt) == CONSTRUCTOR); | |
1392 | ||
1393 | tree rhs = gimple_assign_rhs1 (cur_stmt); | |
1394 | if (!VECTOR_TYPE_P (TREE_TYPE (rhs)) | |
1395 | || !INTEGRAL_TYPE_P (TREE_TYPE (TREE_TYPE (rhs))) | |
1396 | || gimple_assign_lhs (cur_stmt) == NULL_TREE) | |
1397 | return false; | |
1398 | ||
1399 | HOST_WIDE_INT sz = int_size_in_bytes (TREE_TYPE (rhs)) * BITS_PER_UNIT; | |
1400 | switch (sz) | |
1401 | { | |
1402 | case 16: | |
1403 | load_type = bswap_type = uint16_type_node; | |
1404 | break; | |
1405 | case 32: | |
1406 | if (builtin_decl_explicit_p (BUILT_IN_BSWAP32) | |
1407 | && optab_handler (bswap_optab, SImode) != CODE_FOR_nothing) | |
1408 | { | |
1409 | load_type = uint32_type_node; | |
1410 | fndecl = builtin_decl_explicit (BUILT_IN_BSWAP32); | |
1411 | bswap_type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (fndecl))); | |
1412 | } | |
1413 | else | |
1414 | return false; | |
1415 | break; | |
1416 | case 64: | |
1417 | if (builtin_decl_explicit_p (BUILT_IN_BSWAP64) | |
1418 | && (optab_handler (bswap_optab, DImode) != CODE_FOR_nothing | |
1419 | || (word_mode == SImode | |
1420 | && builtin_decl_explicit_p (BUILT_IN_BSWAP32) | |
1421 | && optab_handler (bswap_optab, SImode) != CODE_FOR_nothing))) | |
1422 | { | |
1423 | load_type = uint64_type_node; | |
1424 | fndecl = builtin_decl_explicit (BUILT_IN_BSWAP64); | |
1425 | bswap_type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (fndecl))); | |
1426 | } | |
1427 | else | |
1428 | return false; | |
1429 | break; | |
1430 | default: | |
1431 | return false; | |
1432 | } | |
1433 | ||
b320edc0 JJ |
1434 | bool cast64_to_32; |
1435 | uint64_t mask; | |
1436 | gimple *ins_stmt = find_bswap_or_nop (cur_stmt, &n, &bswap, | |
1437 | &cast64_to_32, &mask); | |
1438 | if (!ins_stmt | |
1439 | || n.range != (unsigned HOST_WIDE_INT) sz | |
1440 | || cast64_to_32 | |
1441 | || mask != ~(uint64_t) 0) | |
a7553ad6 JJ |
1442 | return false; |
1443 | ||
1444 | if (bswap && !fndecl && n.range != 16) | |
1445 | return false; | |
1446 | ||
1447 | memset (&nop_stats, 0, sizeof (nop_stats)); | |
1448 | memset (&bswap_stats, 0, sizeof (bswap_stats)); | |
1449 | return bswap_replace (gsi_for_stmt (cur_stmt), ins_stmt, fndecl, | |
b320edc0 | 1450 | bswap_type, load_type, &n, bswap, mask) != NULL_TREE; |
a7553ad6 JJ |
1451 | } |
1452 | ||
dffec8eb JJ |
1453 | /* Find manual byte swap implementations as well as load in a given |
1454 | endianness. Byte swaps are turned into a bswap builtin invokation | |
1455 | while endian loads are converted to bswap builtin invokation or | |
1456 | simple load according to the target endianness. */ | |
1457 | ||
1458 | unsigned int | |
1459 | pass_optimize_bswap::execute (function *fun) | |
1460 | { | |
1461 | basic_block bb; | |
1462 | bool bswap32_p, bswap64_p; | |
1463 | bool changed = false; | |
1464 | tree bswap32_type = NULL_TREE, bswap64_type = NULL_TREE; | |
1465 | ||
1466 | bswap32_p = (builtin_decl_explicit_p (BUILT_IN_BSWAP32) | |
1467 | && optab_handler (bswap_optab, SImode) != CODE_FOR_nothing); | |
1468 | bswap64_p = (builtin_decl_explicit_p (BUILT_IN_BSWAP64) | |
1469 | && (optab_handler (bswap_optab, DImode) != CODE_FOR_nothing | |
1470 | || (bswap32_p && word_mode == SImode))); | |
1471 | ||
1472 | /* Determine the argument type of the builtins. The code later on | |
1473 | assumes that the return and argument type are the same. */ | |
1474 | if (bswap32_p) | |
1475 | { | |
1476 | tree fndecl = builtin_decl_explicit (BUILT_IN_BSWAP32); | |
1477 | bswap32_type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (fndecl))); | |
1478 | } | |
1479 | ||
1480 | if (bswap64_p) | |
1481 | { | |
1482 | tree fndecl = builtin_decl_explicit (BUILT_IN_BSWAP64); | |
1483 | bswap64_type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (fndecl))); | |
1484 | } | |
1485 | ||
1486 | memset (&nop_stats, 0, sizeof (nop_stats)); | |
1487 | memset (&bswap_stats, 0, sizeof (bswap_stats)); | |
1488 | calculate_dominance_info (CDI_DOMINATORS); | |
1489 | ||
1490 | FOR_EACH_BB_FN (bb, fun) | |
1491 | { | |
1492 | gimple_stmt_iterator gsi; | |
1493 | ||
1494 | /* We do a reverse scan for bswap patterns to make sure we get the | |
1495 | widest match. As bswap pattern matching doesn't handle previously | |
1496 | inserted smaller bswap replacements as sub-patterns, the wider | |
1497 | variant wouldn't be detected. */ | |
1498 | for (gsi = gsi_last_bb (bb); !gsi_end_p (gsi);) | |
1499 | { | |
1500 | gimple *ins_stmt, *cur_stmt = gsi_stmt (gsi); | |
1501 | tree fndecl = NULL_TREE, bswap_type = NULL_TREE, load_type; | |
1502 | enum tree_code code; | |
1503 | struct symbolic_number n; | |
b320edc0 JJ |
1504 | bool bswap, cast64_to_32; |
1505 | uint64_t mask; | |
dffec8eb JJ |
1506 | |
1507 | /* This gsi_prev (&gsi) is not part of the for loop because cur_stmt | |
1508 | might be moved to a different basic block by bswap_replace and gsi | |
1509 | must not points to it if that's the case. Moving the gsi_prev | |
1510 | there make sure that gsi points to the statement previous to | |
1511 | cur_stmt while still making sure that all statements are | |
1512 | considered in this basic block. */ | |
1513 | gsi_prev (&gsi); | |
1514 | ||
1515 | if (!is_gimple_assign (cur_stmt)) | |
1516 | continue; | |
1517 | ||
1518 | code = gimple_assign_rhs_code (cur_stmt); | |
1519 | switch (code) | |
1520 | { | |
1521 | case LROTATE_EXPR: | |
1522 | case RROTATE_EXPR: | |
1523 | if (!tree_fits_uhwi_p (gimple_assign_rhs2 (cur_stmt)) | |
1524 | || tree_to_uhwi (gimple_assign_rhs2 (cur_stmt)) | |
1525 | % BITS_PER_UNIT) | |
1526 | continue; | |
1527 | /* Fall through. */ | |
1528 | case BIT_IOR_EXPR: | |
a944b5de RS |
1529 | case BIT_XOR_EXPR: |
1530 | case PLUS_EXPR: | |
dffec8eb | 1531 | break; |
cd676dfa JJ |
1532 | case CONSTRUCTOR: |
1533 | { | |
1534 | tree rhs = gimple_assign_rhs1 (cur_stmt); | |
1535 | if (VECTOR_TYPE_P (TREE_TYPE (rhs)) | |
1536 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_TYPE (rhs)))) | |
1537 | break; | |
1538 | } | |
1539 | continue; | |
dffec8eb JJ |
1540 | default: |
1541 | continue; | |
1542 | } | |
1543 | ||
b320edc0 JJ |
1544 | ins_stmt = find_bswap_or_nop (cur_stmt, &n, &bswap, |
1545 | &cast64_to_32, &mask); | |
dffec8eb JJ |
1546 | |
1547 | if (!ins_stmt) | |
1548 | continue; | |
1549 | ||
1550 | switch (n.range) | |
1551 | { | |
1552 | case 16: | |
1553 | /* Already in canonical form, nothing to do. */ | |
1554 | if (code == LROTATE_EXPR || code == RROTATE_EXPR) | |
1555 | continue; | |
1556 | load_type = bswap_type = uint16_type_node; | |
1557 | break; | |
1558 | case 32: | |
1559 | load_type = uint32_type_node; | |
1560 | if (bswap32_p) | |
1561 | { | |
1562 | fndecl = builtin_decl_explicit (BUILT_IN_BSWAP32); | |
1563 | bswap_type = bswap32_type; | |
1564 | } | |
1565 | break; | |
1566 | case 64: | |
1567 | load_type = uint64_type_node; | |
1568 | if (bswap64_p) | |
1569 | { | |
1570 | fndecl = builtin_decl_explicit (BUILT_IN_BSWAP64); | |
1571 | bswap_type = bswap64_type; | |
1572 | } | |
1573 | break; | |
1574 | default: | |
1575 | continue; | |
1576 | } | |
1577 | ||
1578 | if (bswap && !fndecl && n.range != 16) | |
1579 | continue; | |
1580 | ||
4b84d9b8 | 1581 | if (bswap_replace (gsi_for_stmt (cur_stmt), ins_stmt, fndecl, |
b320edc0 | 1582 | bswap_type, load_type, &n, bswap, mask)) |
dffec8eb JJ |
1583 | changed = true; |
1584 | } | |
1585 | } | |
1586 | ||
1587 | statistics_counter_event (fun, "16-bit nop implementations found", | |
1588 | nop_stats.found_16bit); | |
1589 | statistics_counter_event (fun, "32-bit nop implementations found", | |
1590 | nop_stats.found_32bit); | |
1591 | statistics_counter_event (fun, "64-bit nop implementations found", | |
1592 | nop_stats.found_64bit); | |
1593 | statistics_counter_event (fun, "16-bit bswap implementations found", | |
1594 | bswap_stats.found_16bit); | |
1595 | statistics_counter_event (fun, "32-bit bswap implementations found", | |
1596 | bswap_stats.found_32bit); | |
1597 | statistics_counter_event (fun, "64-bit bswap implementations found", | |
1598 | bswap_stats.found_64bit); | |
1599 | ||
1600 | return (changed ? TODO_update_ssa : 0); | |
1601 | } | |
1602 | ||
1603 | } // anon namespace | |
1604 | ||
1605 | gimple_opt_pass * | |
1606 | make_pass_optimize_bswap (gcc::context *ctxt) | |
1607 | { | |
1608 | return new pass_optimize_bswap (ctxt); | |
1609 | } | |
1610 | ||
1611 | namespace { | |
1612 | ||
245f6de1 | 1613 | /* Struct recording one operand for the store, which is either a constant, |
c94c3532 EB |
1614 | then VAL represents the constant and all the other fields are zero, or |
1615 | a memory load, then VAL represents the reference, BASE_ADDR is non-NULL | |
1616 | and the other fields also reflect the memory load, or an SSA name, then | |
1617 | VAL represents the SSA name and all the other fields are zero, */ | |
245f6de1 | 1618 | |
6c1dae73 | 1619 | class store_operand_info |
245f6de1 | 1620 | { |
6c1dae73 | 1621 | public: |
245f6de1 JJ |
1622 | tree val; |
1623 | tree base_addr; | |
8a91d545 RS |
1624 | poly_uint64 bitsize; |
1625 | poly_uint64 bitpos; | |
1626 | poly_uint64 bitregion_start; | |
1627 | poly_uint64 bitregion_end; | |
245f6de1 | 1628 | gimple *stmt; |
383ac8dc | 1629 | bool bit_not_p; |
245f6de1 JJ |
1630 | store_operand_info (); |
1631 | }; | |
1632 | ||
1633 | store_operand_info::store_operand_info () | |
1634 | : val (NULL_TREE), base_addr (NULL_TREE), bitsize (0), bitpos (0), | |
383ac8dc | 1635 | bitregion_start (0), bitregion_end (0), stmt (NULL), bit_not_p (false) |
245f6de1 JJ |
1636 | { |
1637 | } | |
1638 | ||
f663d9ad KT |
1639 | /* Struct recording the information about a single store of an immediate |
1640 | to memory. These are created in the first phase and coalesced into | |
1641 | merged_store_group objects in the second phase. */ | |
1642 | ||
6c1dae73 | 1643 | class store_immediate_info |
f663d9ad | 1644 | { |
6c1dae73 | 1645 | public: |
f663d9ad KT |
1646 | unsigned HOST_WIDE_INT bitsize; |
1647 | unsigned HOST_WIDE_INT bitpos; | |
a62b3dc5 JJ |
1648 | unsigned HOST_WIDE_INT bitregion_start; |
1649 | /* This is one past the last bit of the bit region. */ | |
1650 | unsigned HOST_WIDE_INT bitregion_end; | |
f663d9ad KT |
1651 | gimple *stmt; |
1652 | unsigned int order; | |
e362a897 EB |
1653 | /* INTEGER_CST for constant store, STRING_CST for string store, |
1654 | MEM_REF for memory copy, BIT_*_EXPR for logical bitwise operation, | |
1655 | BIT_INSERT_EXPR for bit insertion. | |
4b84d9b8 JJ |
1656 | LROTATE_EXPR if it can be only bswap optimized and |
1657 | ops are not really meaningful. | |
1658 | NOP_EXPR if bswap optimization detected identity, ops | |
1659 | are not meaningful. */ | |
245f6de1 | 1660 | enum tree_code rhs_code; |
4b84d9b8 JJ |
1661 | /* Two fields for bswap optimization purposes. */ |
1662 | struct symbolic_number n; | |
1663 | gimple *ins_stmt; | |
127ef369 | 1664 | /* True if BIT_{AND,IOR,XOR}_EXPR result is inverted before storing. */ |
d60edaba | 1665 | bool bit_not_p; |
127ef369 JJ |
1666 | /* True if ops have been swapped and thus ops[1] represents |
1667 | rhs1 of BIT_{AND,IOR,XOR}_EXPR and ops[0] represents rhs2. */ | |
1668 | bool ops_swapped_p; | |
629387a6 EB |
1669 | /* The index number of the landing pad, or 0 if there is none. */ |
1670 | int lp_nr; | |
245f6de1 JJ |
1671 | /* Operands. For BIT_*_EXPR rhs_code both operands are used, otherwise |
1672 | just the first one. */ | |
1673 | store_operand_info ops[2]; | |
b5926e23 | 1674 | store_immediate_info (unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, |
a62b3dc5 | 1675 | unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, |
4b84d9b8 | 1676 | gimple *, unsigned int, enum tree_code, |
629387a6 | 1677 | struct symbolic_number &, gimple *, bool, int, |
245f6de1 JJ |
1678 | const store_operand_info &, |
1679 | const store_operand_info &); | |
f663d9ad KT |
1680 | }; |
1681 | ||
1682 | store_immediate_info::store_immediate_info (unsigned HOST_WIDE_INT bs, | |
b5926e23 | 1683 | unsigned HOST_WIDE_INT bp, |
a62b3dc5 JJ |
1684 | unsigned HOST_WIDE_INT brs, |
1685 | unsigned HOST_WIDE_INT bre, | |
b5926e23 | 1686 | gimple *st, |
245f6de1 JJ |
1687 | unsigned int ord, |
1688 | enum tree_code rhscode, | |
4b84d9b8 JJ |
1689 | struct symbolic_number &nr, |
1690 | gimple *ins_stmtp, | |
d60edaba | 1691 | bool bitnotp, |
629387a6 | 1692 | int nr2, |
245f6de1 JJ |
1693 | const store_operand_info &op0r, |
1694 | const store_operand_info &op1r) | |
a62b3dc5 | 1695 | : bitsize (bs), bitpos (bp), bitregion_start (brs), bitregion_end (bre), |
4b84d9b8 | 1696 | stmt (st), order (ord), rhs_code (rhscode), n (nr), |
629387a6 | 1697 | ins_stmt (ins_stmtp), bit_not_p (bitnotp), ops_swapped_p (false), |
4bc6fb21 | 1698 | lp_nr (nr2), ops { op0r, op1r } |
245f6de1 JJ |
1699 | { |
1700 | } | |
f663d9ad KT |
1701 | |
1702 | /* Struct representing a group of stores to contiguous memory locations. | |
1703 | These are produced by the second phase (coalescing) and consumed in the | |
1704 | third phase that outputs the widened stores. */ | |
1705 | ||
6c1dae73 | 1706 | class merged_store_group |
f663d9ad | 1707 | { |
6c1dae73 | 1708 | public: |
f663d9ad KT |
1709 | unsigned HOST_WIDE_INT start; |
1710 | unsigned HOST_WIDE_INT width; | |
a62b3dc5 JJ |
1711 | unsigned HOST_WIDE_INT bitregion_start; |
1712 | unsigned HOST_WIDE_INT bitregion_end; | |
1713 | /* The size of the allocated memory for val and mask. */ | |
f663d9ad | 1714 | unsigned HOST_WIDE_INT buf_size; |
a62b3dc5 | 1715 | unsigned HOST_WIDE_INT align_base; |
8a91d545 | 1716 | poly_uint64 load_align_base[2]; |
f663d9ad KT |
1717 | |
1718 | unsigned int align; | |
245f6de1 | 1719 | unsigned int load_align[2]; |
f663d9ad KT |
1720 | unsigned int first_order; |
1721 | unsigned int last_order; | |
7f5a3982 | 1722 | bool bit_insertion; |
e362a897 | 1723 | bool string_concatenation; |
18e0c3d1 | 1724 | bool only_constants; |
1b3c9813 | 1725 | bool consecutive; |
18e0c3d1 | 1726 | unsigned int first_nonmergeable_order; |
629387a6 | 1727 | int lp_nr; |
f663d9ad | 1728 | |
a62b3dc5 | 1729 | auto_vec<store_immediate_info *> stores; |
f663d9ad KT |
1730 | /* We record the first and last original statements in the sequence because |
1731 | we'll need their vuse/vdef and replacement position. It's easier to keep | |
1732 | track of them separately as 'stores' is reordered by apply_stores. */ | |
1733 | gimple *last_stmt; | |
1734 | gimple *first_stmt; | |
1735 | unsigned char *val; | |
a62b3dc5 | 1736 | unsigned char *mask; |
f663d9ad KT |
1737 | |
1738 | merged_store_group (store_immediate_info *); | |
1739 | ~merged_store_group (); | |
7f5a3982 | 1740 | bool can_be_merged_into (store_immediate_info *); |
f663d9ad KT |
1741 | void merge_into (store_immediate_info *); |
1742 | void merge_overlapping (store_immediate_info *); | |
1743 | bool apply_stores (); | |
a62b3dc5 JJ |
1744 | private: |
1745 | void do_merge (store_immediate_info *); | |
f663d9ad KT |
1746 | }; |
1747 | ||
1748 | /* Debug helper. Dump LEN elements of byte array PTR to FD in hex. */ | |
1749 | ||
1750 | static void | |
1751 | dump_char_array (FILE *fd, unsigned char *ptr, unsigned int len) | |
1752 | { | |
1753 | if (!fd) | |
1754 | return; | |
1755 | ||
1756 | for (unsigned int i = 0; i < len; i++) | |
c94c3532 | 1757 | fprintf (fd, "%02x ", ptr[i]); |
f663d9ad KT |
1758 | fprintf (fd, "\n"); |
1759 | } | |
1760 | ||
f663d9ad KT |
1761 | /* Clear out LEN bits starting from bit START in the byte array |
1762 | PTR. This clears the bits to the *right* from START. | |
1763 | START must be within [0, BITS_PER_UNIT) and counts starting from | |
1764 | the least significant bit. */ | |
1765 | ||
1766 | static void | |
1767 | clear_bit_region_be (unsigned char *ptr, unsigned int start, | |
1768 | unsigned int len) | |
1769 | { | |
1770 | if (len == 0) | |
1771 | return; | |
1772 | /* Clear len bits to the right of start. */ | |
1773 | else if (len <= start + 1) | |
1774 | { | |
1775 | unsigned char mask = (~(~0U << len)); | |
1776 | mask = mask << (start + 1U - len); | |
1777 | ptr[0] &= ~mask; | |
1778 | } | |
1779 | else if (start != BITS_PER_UNIT - 1) | |
1780 | { | |
1781 | clear_bit_region_be (ptr, start, (start % BITS_PER_UNIT) + 1); | |
1782 | clear_bit_region_be (ptr + 1, BITS_PER_UNIT - 1, | |
1783 | len - (start % BITS_PER_UNIT) - 1); | |
1784 | } | |
1785 | else if (start == BITS_PER_UNIT - 1 | |
1786 | && len > BITS_PER_UNIT) | |
1787 | { | |
1788 | unsigned int nbytes = len / BITS_PER_UNIT; | |
a62b3dc5 | 1789 | memset (ptr, 0, nbytes); |
f663d9ad KT |
1790 | if (len % BITS_PER_UNIT != 0) |
1791 | clear_bit_region_be (ptr + nbytes, BITS_PER_UNIT - 1, | |
1792 | len % BITS_PER_UNIT); | |
1793 | } | |
1794 | else | |
1795 | gcc_unreachable (); | |
1796 | } | |
1797 | ||
1798 | /* In the byte array PTR clear the bit region starting at bit | |
1799 | START and is LEN bits wide. | |
1800 | For regions spanning multiple bytes do this recursively until we reach | |
1801 | zero LEN or a region contained within a single byte. */ | |
1802 | ||
1803 | static void | |
1804 | clear_bit_region (unsigned char *ptr, unsigned int start, | |
1805 | unsigned int len) | |
1806 | { | |
1807 | /* Degenerate base case. */ | |
1808 | if (len == 0) | |
1809 | return; | |
1810 | else if (start >= BITS_PER_UNIT) | |
1811 | clear_bit_region (ptr + 1, start - BITS_PER_UNIT, len); | |
1812 | /* Second base case. */ | |
1813 | else if ((start + len) <= BITS_PER_UNIT) | |
1814 | { | |
46a61395 | 1815 | unsigned char mask = (~0U) << (unsigned char) (BITS_PER_UNIT - len); |
f663d9ad KT |
1816 | mask >>= BITS_PER_UNIT - (start + len); |
1817 | ||
1818 | ptr[0] &= ~mask; | |
1819 | ||
1820 | return; | |
1821 | } | |
1822 | /* Clear most significant bits in a byte and proceed with the next byte. */ | |
1823 | else if (start != 0) | |
1824 | { | |
1825 | clear_bit_region (ptr, start, BITS_PER_UNIT - start); | |
1f069ef5 | 1826 | clear_bit_region (ptr + 1, 0, len - (BITS_PER_UNIT - start)); |
f663d9ad KT |
1827 | } |
1828 | /* Whole bytes need to be cleared. */ | |
1829 | else if (start == 0 && len > BITS_PER_UNIT) | |
1830 | { | |
1831 | unsigned int nbytes = len / BITS_PER_UNIT; | |
a848c710 KT |
1832 | /* We could recurse on each byte but we clear whole bytes, so a simple |
1833 | memset will do. */ | |
46a61395 | 1834 | memset (ptr, '\0', nbytes); |
f663d9ad KT |
1835 | /* Clear the remaining sub-byte region if there is one. */ |
1836 | if (len % BITS_PER_UNIT != 0) | |
1837 | clear_bit_region (ptr + nbytes, 0, len % BITS_PER_UNIT); | |
1838 | } | |
1839 | else | |
1840 | gcc_unreachable (); | |
1841 | } | |
1842 | ||
1843 | /* Write BITLEN bits of EXPR to the byte array PTR at | |
1844 | bit position BITPOS. PTR should contain TOTAL_BYTES elements. | |
1845 | Return true if the operation succeeded. */ | |
1846 | ||
1847 | static bool | |
1848 | encode_tree_to_bitpos (tree expr, unsigned char *ptr, int bitlen, int bitpos, | |
46a61395 | 1849 | unsigned int total_bytes) |
f663d9ad KT |
1850 | { |
1851 | unsigned int first_byte = bitpos / BITS_PER_UNIT; | |
ad1de652 JJ |
1852 | bool sub_byte_op_p = ((bitlen % BITS_PER_UNIT) |
1853 | || (bitpos % BITS_PER_UNIT) | |
f4b31647 | 1854 | || !int_mode_for_size (bitlen, 0).exists ()); |
3afd514b JJ |
1855 | bool empty_ctor_p |
1856 | = (TREE_CODE (expr) == CONSTRUCTOR | |
1857 | && CONSTRUCTOR_NELTS (expr) == 0 | |
1858 | && TYPE_SIZE_UNIT (TREE_TYPE (expr)) | |
1859 | && tree_fits_uhwi_p (TYPE_SIZE_UNIT (TREE_TYPE (expr)))); | |
f663d9ad KT |
1860 | |
1861 | if (!sub_byte_op_p) | |
3afd514b JJ |
1862 | { |
1863 | if (first_byte >= total_bytes) | |
1864 | return false; | |
1865 | total_bytes -= first_byte; | |
1866 | if (empty_ctor_p) | |
1867 | { | |
1868 | unsigned HOST_WIDE_INT rhs_bytes | |
1869 | = tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (expr))); | |
1870 | if (rhs_bytes > total_bytes) | |
1871 | return false; | |
1872 | memset (ptr + first_byte, '\0', rhs_bytes); | |
1873 | return true; | |
1874 | } | |
1875 | return native_encode_expr (expr, ptr + first_byte, total_bytes) != 0; | |
1876 | } | |
f663d9ad KT |
1877 | |
1878 | /* LITTLE-ENDIAN | |
1879 | We are writing a non byte-sized quantity or at a position that is not | |
1880 | at a byte boundary. | |
1881 | |--------|--------|--------| ptr + first_byte | |
1882 | ^ ^ | |
1883 | xxx xxxxxxxx xxx< bp> | |
1884 | |______EXPR____| | |
1885 | ||
46a61395 | 1886 | First native_encode_expr EXPR into a temporary buffer and shift each |
f663d9ad KT |
1887 | byte in the buffer by 'bp' (carrying the bits over as necessary). |
1888 | |00000000|00xxxxxx|xxxxxxxx| << bp = |000xxxxx|xxxxxxxx|xxx00000| | |
1889 | <------bitlen---->< bp> | |
1890 | Then we clear the destination bits: | |
1891 | |---00000|00000000|000-----| ptr + first_byte | |
1892 | <-------bitlen--->< bp> | |
1893 | ||
1894 | Finally we ORR the bytes of the shifted EXPR into the cleared region: | |
1895 | |---xxxxx||xxxxxxxx||xxx-----| ptr + first_byte. | |
1896 | ||
1897 | BIG-ENDIAN | |
1898 | We are writing a non byte-sized quantity or at a position that is not | |
1899 | at a byte boundary. | |
1900 | ptr + first_byte |--------|--------|--------| | |
1901 | ^ ^ | |
1902 | <bp >xxx xxxxxxxx xxx | |
1903 | |_____EXPR_____| | |
1904 | ||
46a61395 | 1905 | First native_encode_expr EXPR into a temporary buffer and shift each |
f663d9ad KT |
1906 | byte in the buffer to the right by (carrying the bits over as necessary). |
1907 | We shift by as much as needed to align the most significant bit of EXPR | |
1908 | with bitpos: | |
1909 | |00xxxxxx|xxxxxxxx| >> 3 = |00000xxx|xxxxxxxx|xxxxx000| | |
1910 | <---bitlen----> <bp ><-----bitlen-----> | |
1911 | Then we clear the destination bits: | |
1912 | ptr + first_byte |-----000||00000000||00000---| | |
1913 | <bp ><-------bitlen-----> | |
1914 | ||
1915 | Finally we ORR the bytes of the shifted EXPR into the cleared region: | |
1916 | ptr + first_byte |---xxxxx||xxxxxxxx||xxx-----|. | |
1917 | The awkwardness comes from the fact that bitpos is counted from the | |
1918 | most significant bit of a byte. */ | |
1919 | ||
ef1d3b57 RS |
1920 | /* We must be dealing with fixed-size data at this point, since the |
1921 | total size is also fixed. */ | |
3afd514b JJ |
1922 | unsigned int byte_size; |
1923 | if (empty_ctor_p) | |
1924 | { | |
1925 | unsigned HOST_WIDE_INT rhs_bytes | |
1926 | = tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (expr))); | |
1927 | if (rhs_bytes > total_bytes) | |
1928 | return false; | |
1929 | byte_size = rhs_bytes; | |
1930 | } | |
1931 | else | |
1932 | { | |
1933 | fixed_size_mode mode | |
1934 | = as_a <fixed_size_mode> (TYPE_MODE (TREE_TYPE (expr))); | |
e362a897 EB |
1935 | byte_size |
1936 | = mode == BLKmode | |
1937 | ? tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (expr))) | |
1938 | : GET_MODE_SIZE (mode); | |
3afd514b | 1939 | } |
f663d9ad | 1940 | /* Allocate an extra byte so that we have space to shift into. */ |
3afd514b | 1941 | byte_size++; |
f663d9ad | 1942 | unsigned char *tmpbuf = XALLOCAVEC (unsigned char, byte_size); |
46a61395 | 1943 | memset (tmpbuf, '\0', byte_size); |
f663d9ad | 1944 | /* The store detection code should only have allowed constants that are |
3afd514b JJ |
1945 | accepted by native_encode_expr or empty ctors. */ |
1946 | if (!empty_ctor_p | |
1947 | && native_encode_expr (expr, tmpbuf, byte_size - 1) == 0) | |
f663d9ad KT |
1948 | gcc_unreachable (); |
1949 | ||
1950 | /* The native_encode_expr machinery uses TYPE_MODE to determine how many | |
1951 | bytes to write. This means it can write more than | |
1952 | ROUND_UP (bitlen, BITS_PER_UNIT) / BITS_PER_UNIT bytes (for example | |
1953 | write 8 bytes for a bitlen of 40). Skip the bytes that are not within | |
1954 | bitlen and zero out the bits that are not relevant as well (that may | |
1955 | contain a sign bit due to sign-extension). */ | |
1956 | unsigned int padding | |
1957 | = byte_size - ROUND_UP (bitlen, BITS_PER_UNIT) / BITS_PER_UNIT - 1; | |
ad1de652 JJ |
1958 | /* On big-endian the padding is at the 'front' so just skip the initial |
1959 | bytes. */ | |
1960 | if (BYTES_BIG_ENDIAN) | |
1961 | tmpbuf += padding; | |
1962 | ||
1963 | byte_size -= padding; | |
1964 | ||
1965 | if (bitlen % BITS_PER_UNIT != 0) | |
f663d9ad | 1966 | { |
4b2c06f4 | 1967 | if (BYTES_BIG_ENDIAN) |
ad1de652 JJ |
1968 | clear_bit_region_be (tmpbuf, BITS_PER_UNIT - 1, |
1969 | BITS_PER_UNIT - (bitlen % BITS_PER_UNIT)); | |
1970 | else | |
1971 | clear_bit_region (tmpbuf, bitlen, | |
1972 | byte_size * BITS_PER_UNIT - bitlen); | |
f663d9ad | 1973 | } |
ad1de652 JJ |
1974 | /* Left shifting relies on the last byte being clear if bitlen is |
1975 | a multiple of BITS_PER_UNIT, which might not be clear if | |
1976 | there are padding bytes. */ | |
1977 | else if (!BYTES_BIG_ENDIAN) | |
1978 | tmpbuf[byte_size - 1] = '\0'; | |
f663d9ad KT |
1979 | |
1980 | /* Clear the bit region in PTR where the bits from TMPBUF will be | |
46a61395 | 1981 | inserted into. */ |
f663d9ad KT |
1982 | if (BYTES_BIG_ENDIAN) |
1983 | clear_bit_region_be (ptr + first_byte, | |
1984 | BITS_PER_UNIT - 1 - (bitpos % BITS_PER_UNIT), bitlen); | |
1985 | else | |
1986 | clear_bit_region (ptr + first_byte, bitpos % BITS_PER_UNIT, bitlen); | |
1987 | ||
1988 | int shift_amnt; | |
1989 | int bitlen_mod = bitlen % BITS_PER_UNIT; | |
1990 | int bitpos_mod = bitpos % BITS_PER_UNIT; | |
1991 | ||
1992 | bool skip_byte = false; | |
1993 | if (BYTES_BIG_ENDIAN) | |
1994 | { | |
1995 | /* BITPOS and BITLEN are exactly aligned and no shifting | |
1996 | is necessary. */ | |
1997 | if (bitpos_mod + bitlen_mod == BITS_PER_UNIT | |
1998 | || (bitpos_mod == 0 && bitlen_mod == 0)) | |
1999 | shift_amnt = 0; | |
2000 | /* |. . . . . . . .| | |
2001 | <bp > <blen >. | |
2002 | We always shift right for BYTES_BIG_ENDIAN so shift the beginning | |
2003 | of the value until it aligns with 'bp' in the next byte over. */ | |
2004 | else if (bitpos_mod + bitlen_mod < BITS_PER_UNIT) | |
2005 | { | |
2006 | shift_amnt = bitlen_mod + bitpos_mod; | |
2007 | skip_byte = bitlen_mod != 0; | |
2008 | } | |
2009 | /* |. . . . . . . .| | |
2010 | <----bp---> | |
2011 | <---blen---->. | |
2012 | Shift the value right within the same byte so it aligns with 'bp'. */ | |
2013 | else | |
2014 | shift_amnt = bitlen_mod + bitpos_mod - BITS_PER_UNIT; | |
2015 | } | |
2016 | else | |
2017 | shift_amnt = bitpos % BITS_PER_UNIT; | |
2018 | ||
2019 | /* Create the shifted version of EXPR. */ | |
2020 | if (!BYTES_BIG_ENDIAN) | |
46a61395 | 2021 | { |
8aba425f | 2022 | shift_bytes_in_array_left (tmpbuf, byte_size, shift_amnt); |
46a61395 JJ |
2023 | if (shift_amnt == 0) |
2024 | byte_size--; | |
2025 | } | |
f663d9ad KT |
2026 | else |
2027 | { | |
2028 | gcc_assert (BYTES_BIG_ENDIAN); | |
2029 | shift_bytes_in_array_right (tmpbuf, byte_size, shift_amnt); | |
2030 | /* If shifting right forced us to move into the next byte skip the now | |
2031 | empty byte. */ | |
2032 | if (skip_byte) | |
2033 | { | |
2034 | tmpbuf++; | |
2035 | byte_size--; | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | /* Insert the bits from TMPBUF. */ | |
2040 | for (unsigned int i = 0; i < byte_size; i++) | |
2041 | ptr[first_byte + i] |= tmpbuf[i]; | |
2042 | ||
2043 | return true; | |
2044 | } | |
2045 | ||
2046 | /* Sorting function for store_immediate_info objects. | |
2047 | Sorts them by bitposition. */ | |
2048 | ||
2049 | static int | |
2050 | sort_by_bitpos (const void *x, const void *y) | |
2051 | { | |
2052 | store_immediate_info *const *tmp = (store_immediate_info * const *) x; | |
2053 | store_immediate_info *const *tmp2 = (store_immediate_info * const *) y; | |
2054 | ||
109cca3b | 2055 | if ((*tmp)->bitpos < (*tmp2)->bitpos) |
f663d9ad KT |
2056 | return -1; |
2057 | else if ((*tmp)->bitpos > (*tmp2)->bitpos) | |
2058 | return 1; | |
109cca3b | 2059 | else |
0f0027d1 KT |
2060 | /* If they are the same let's use the order which is guaranteed to |
2061 | be different. */ | |
2062 | return (*tmp)->order - (*tmp2)->order; | |
f663d9ad KT |
2063 | } |
2064 | ||
2065 | /* Sorting function for store_immediate_info objects. | |
2066 | Sorts them by the order field. */ | |
2067 | ||
2068 | static int | |
2069 | sort_by_order (const void *x, const void *y) | |
2070 | { | |
2071 | store_immediate_info *const *tmp = (store_immediate_info * const *) x; | |
2072 | store_immediate_info *const *tmp2 = (store_immediate_info * const *) y; | |
2073 | ||
2074 | if ((*tmp)->order < (*tmp2)->order) | |
2075 | return -1; | |
2076 | else if ((*tmp)->order > (*tmp2)->order) | |
2077 | return 1; | |
2078 | ||
2079 | gcc_unreachable (); | |
2080 | } | |
2081 | ||
2082 | /* Initialize a merged_store_group object from a store_immediate_info | |
2083 | object. */ | |
2084 | ||
2085 | merged_store_group::merged_store_group (store_immediate_info *info) | |
2086 | { | |
2087 | start = info->bitpos; | |
2088 | width = info->bitsize; | |
a62b3dc5 JJ |
2089 | bitregion_start = info->bitregion_start; |
2090 | bitregion_end = info->bitregion_end; | |
f663d9ad KT |
2091 | /* VAL has memory allocated for it in apply_stores once the group |
2092 | width has been finalized. */ | |
2093 | val = NULL; | |
a62b3dc5 | 2094 | mask = NULL; |
e362a897 EB |
2095 | bit_insertion = info->rhs_code == BIT_INSERT_EXPR; |
2096 | string_concatenation = info->rhs_code == STRING_CST; | |
18e0c3d1 | 2097 | only_constants = info->rhs_code == INTEGER_CST; |
1b3c9813 | 2098 | consecutive = true; |
18e0c3d1 | 2099 | first_nonmergeable_order = ~0U; |
629387a6 | 2100 | lp_nr = info->lp_nr; |
a62b3dc5 JJ |
2101 | unsigned HOST_WIDE_INT align_bitpos = 0; |
2102 | get_object_alignment_1 (gimple_assign_lhs (info->stmt), | |
2103 | &align, &align_bitpos); | |
2104 | align_base = start - align_bitpos; | |
245f6de1 JJ |
2105 | for (int i = 0; i < 2; ++i) |
2106 | { | |
2107 | store_operand_info &op = info->ops[i]; | |
2108 | if (op.base_addr == NULL_TREE) | |
2109 | { | |
2110 | load_align[i] = 0; | |
2111 | load_align_base[i] = 0; | |
2112 | } | |
2113 | else | |
2114 | { | |
2115 | get_object_alignment_1 (op.val, &load_align[i], &align_bitpos); | |
2116 | load_align_base[i] = op.bitpos - align_bitpos; | |
2117 | } | |
2118 | } | |
f663d9ad KT |
2119 | stores.create (1); |
2120 | stores.safe_push (info); | |
2121 | last_stmt = info->stmt; | |
2122 | last_order = info->order; | |
2123 | first_stmt = last_stmt; | |
2124 | first_order = last_order; | |
2125 | buf_size = 0; | |
2126 | } | |
2127 | ||
2128 | merged_store_group::~merged_store_group () | |
2129 | { | |
2130 | if (val) | |
2131 | XDELETEVEC (val); | |
2132 | } | |
2133 | ||
7f5a3982 EB |
2134 | /* Return true if the store described by INFO can be merged into the group. */ |
2135 | ||
2136 | bool | |
2137 | merged_store_group::can_be_merged_into (store_immediate_info *info) | |
2138 | { | |
2139 | /* Do not merge bswap patterns. */ | |
2140 | if (info->rhs_code == LROTATE_EXPR) | |
2141 | return false; | |
2142 | ||
629387a6 EB |
2143 | if (info->lp_nr != lp_nr) |
2144 | return false; | |
2145 | ||
7f5a3982 EB |
2146 | /* The canonical case. */ |
2147 | if (info->rhs_code == stores[0]->rhs_code) | |
2148 | return true; | |
2149 | ||
e362a897 | 2150 | /* BIT_INSERT_EXPR is compatible with INTEGER_CST if no STRING_CST. */ |
7f5a3982 | 2151 | if (info->rhs_code == BIT_INSERT_EXPR && stores[0]->rhs_code == INTEGER_CST) |
e362a897 | 2152 | return !string_concatenation; |
7f5a3982 EB |
2153 | |
2154 | if (stores[0]->rhs_code == BIT_INSERT_EXPR && info->rhs_code == INTEGER_CST) | |
e362a897 | 2155 | return !string_concatenation; |
7f5a3982 | 2156 | |
ed01d707 EB |
2157 | /* We can turn MEM_REF into BIT_INSERT_EXPR for bit-field stores, but do it |
2158 | only for small regions since this can generate a lot of instructions. */ | |
7f5a3982 EB |
2159 | if (info->rhs_code == MEM_REF |
2160 | && (stores[0]->rhs_code == INTEGER_CST | |
2161 | || stores[0]->rhs_code == BIT_INSERT_EXPR) | |
2162 | && info->bitregion_start == stores[0]->bitregion_start | |
ed01d707 | 2163 | && info->bitregion_end == stores[0]->bitregion_end |
2815558a | 2164 | && info->bitregion_end - info->bitregion_start <= MAX_FIXED_MODE_SIZE) |
e362a897 | 2165 | return !string_concatenation; |
7f5a3982 EB |
2166 | |
2167 | if (stores[0]->rhs_code == MEM_REF | |
2168 | && (info->rhs_code == INTEGER_CST | |
2169 | || info->rhs_code == BIT_INSERT_EXPR) | |
2170 | && info->bitregion_start == stores[0]->bitregion_start | |
ed01d707 | 2171 | && info->bitregion_end == stores[0]->bitregion_end |
2815558a | 2172 | && info->bitregion_end - info->bitregion_start <= MAX_FIXED_MODE_SIZE) |
e362a897 EB |
2173 | return !string_concatenation; |
2174 | ||
2175 | /* STRING_CST is compatible with INTEGER_CST if no BIT_INSERT_EXPR. */ | |
2176 | if (info->rhs_code == STRING_CST | |
2177 | && stores[0]->rhs_code == INTEGER_CST | |
2178 | && stores[0]->bitsize == CHAR_BIT) | |
2179 | return !bit_insertion; | |
2180 | ||
2181 | if (stores[0]->rhs_code == STRING_CST | |
2182 | && info->rhs_code == INTEGER_CST | |
2183 | && info->bitsize == CHAR_BIT) | |
2184 | return !bit_insertion; | |
7f5a3982 EB |
2185 | |
2186 | return false; | |
2187 | } | |
2188 | ||
a62b3dc5 JJ |
2189 | /* Helper method for merge_into and merge_overlapping to do |
2190 | the common part. */ | |
7f5a3982 | 2191 | |
f663d9ad | 2192 | void |
a62b3dc5 | 2193 | merged_store_group::do_merge (store_immediate_info *info) |
f663d9ad | 2194 | { |
a62b3dc5 JJ |
2195 | bitregion_start = MIN (bitregion_start, info->bitregion_start); |
2196 | bitregion_end = MAX (bitregion_end, info->bitregion_end); | |
2197 | ||
2198 | unsigned int this_align; | |
2199 | unsigned HOST_WIDE_INT align_bitpos = 0; | |
2200 | get_object_alignment_1 (gimple_assign_lhs (info->stmt), | |
2201 | &this_align, &align_bitpos); | |
2202 | if (this_align > align) | |
2203 | { | |
2204 | align = this_align; | |
2205 | align_base = info->bitpos - align_bitpos; | |
2206 | } | |
245f6de1 JJ |
2207 | for (int i = 0; i < 2; ++i) |
2208 | { | |
2209 | store_operand_info &op = info->ops[i]; | |
2210 | if (!op.base_addr) | |
2211 | continue; | |
2212 | ||
2213 | get_object_alignment_1 (op.val, &this_align, &align_bitpos); | |
2214 | if (this_align > load_align[i]) | |
2215 | { | |
2216 | load_align[i] = this_align; | |
2217 | load_align_base[i] = op.bitpos - align_bitpos; | |
2218 | } | |
2219 | } | |
f663d9ad | 2220 | |
f663d9ad KT |
2221 | gimple *stmt = info->stmt; |
2222 | stores.safe_push (info); | |
2223 | if (info->order > last_order) | |
2224 | { | |
2225 | last_order = info->order; | |
2226 | last_stmt = stmt; | |
2227 | } | |
2228 | else if (info->order < first_order) | |
2229 | { | |
2230 | first_order = info->order; | |
2231 | first_stmt = stmt; | |
2232 | } | |
e362a897 | 2233 | |
1b3c9813 EB |
2234 | if (info->bitpos != start + width) |
2235 | consecutive = false; | |
2236 | ||
e362a897 EB |
2237 | /* We need to use extraction if there is any bit-field. */ |
2238 | if (info->rhs_code == BIT_INSERT_EXPR) | |
2239 | { | |
2240 | bit_insertion = true; | |
2241 | gcc_assert (!string_concatenation); | |
2242 | } | |
2243 | ||
1b3c9813 | 2244 | /* We want to use concatenation if there is any string. */ |
e362a897 EB |
2245 | if (info->rhs_code == STRING_CST) |
2246 | { | |
2247 | string_concatenation = true; | |
2248 | gcc_assert (!bit_insertion); | |
2249 | } | |
2250 | ||
1b3c9813 EB |
2251 | /* But we cannot use it if we don't have consecutive stores. */ |
2252 | if (!consecutive) | |
2253 | string_concatenation = false; | |
2254 | ||
18e0c3d1 JJ |
2255 | if (info->rhs_code != INTEGER_CST) |
2256 | only_constants = false; | |
f663d9ad KT |
2257 | } |
2258 | ||
a62b3dc5 JJ |
2259 | /* Merge a store recorded by INFO into this merged store. |
2260 | The store is not overlapping with the existing recorded | |
2261 | stores. */ | |
2262 | ||
2263 | void | |
2264 | merged_store_group::merge_into (store_immediate_info *info) | |
2265 | { | |
1b3c9813 EB |
2266 | do_merge (info); |
2267 | ||
a62b3dc5 JJ |
2268 | /* Make sure we're inserting in the position we think we're inserting. */ |
2269 | gcc_assert (info->bitpos >= start + width | |
2270 | && info->bitregion_start <= bitregion_end); | |
2271 | ||
c5679c37 | 2272 | width = info->bitpos + info->bitsize - start; |
a62b3dc5 JJ |
2273 | } |
2274 | ||
f663d9ad KT |
2275 | /* Merge a store described by INFO into this merged store. |
2276 | INFO overlaps in some way with the current store (i.e. it's not contiguous | |
2277 | which is handled by merged_store_group::merge_into). */ | |
2278 | ||
2279 | void | |
2280 | merged_store_group::merge_overlapping (store_immediate_info *info) | |
2281 | { | |
1b3c9813 EB |
2282 | do_merge (info); |
2283 | ||
f663d9ad | 2284 | /* If the store extends the size of the group, extend the width. */ |
a62b3dc5 | 2285 | if (info->bitpos + info->bitsize > start + width) |
c5679c37 | 2286 | width = info->bitpos + info->bitsize - start; |
f663d9ad KT |
2287 | } |
2288 | ||
2289 | /* Go through all the recorded stores in this group in program order and | |
2290 | apply their values to the VAL byte array to create the final merged | |
2291 | value. Return true if the operation succeeded. */ | |
2292 | ||
2293 | bool | |
2294 | merged_store_group::apply_stores () | |
2295 | { | |
e362a897 EB |
2296 | store_immediate_info *info; |
2297 | unsigned int i; | |
2298 | ||
a62b3dc5 JJ |
2299 | /* Make sure we have more than one store in the group, otherwise we cannot |
2300 | merge anything. */ | |
2301 | if (bitregion_start % BITS_PER_UNIT != 0 | |
2302 | || bitregion_end % BITS_PER_UNIT != 0 | |
f663d9ad KT |
2303 | || stores.length () == 1) |
2304 | return false; | |
2305 | ||
e362a897 EB |
2306 | buf_size = (bitregion_end - bitregion_start) / BITS_PER_UNIT; |
2307 | ||
2308 | /* Really do string concatenation for large strings only. */ | |
2309 | if (buf_size <= MOVE_MAX) | |
2310 | string_concatenation = false; | |
2311 | ||
c94c3532 | 2312 | /* Create a power-of-2-sized buffer for native_encode_expr. */ |
e362a897 EB |
2313 | if (!string_concatenation) |
2314 | buf_size = 1 << ceil_log2 (buf_size); | |
2315 | ||
a62b3dc5 JJ |
2316 | val = XNEWVEC (unsigned char, 2 * buf_size); |
2317 | mask = val + buf_size; | |
2318 | memset (val, 0, buf_size); | |
2319 | memset (mask, ~0U, buf_size); | |
f663d9ad | 2320 | |
e362a897 EB |
2321 | stores.qsort (sort_by_order); |
2322 | ||
f663d9ad KT |
2323 | FOR_EACH_VEC_ELT (stores, i, info) |
2324 | { | |
a62b3dc5 | 2325 | unsigned int pos_in_buffer = info->bitpos - bitregion_start; |
c94c3532 | 2326 | tree cst; |
245f6de1 JJ |
2327 | if (info->ops[0].val && info->ops[0].base_addr == NULL_TREE) |
2328 | cst = info->ops[0].val; | |
2329 | else if (info->ops[1].val && info->ops[1].base_addr == NULL_TREE) | |
2330 | cst = info->ops[1].val; | |
c94c3532 EB |
2331 | else |
2332 | cst = NULL_TREE; | |
245f6de1 | 2333 | bool ret = true; |
e362a897 EB |
2334 | if (cst && info->rhs_code != BIT_INSERT_EXPR) |
2335 | ret = encode_tree_to_bitpos (cst, val, info->bitsize, pos_in_buffer, | |
2336 | buf_size); | |
c94c3532 EB |
2337 | unsigned char *m = mask + (pos_in_buffer / BITS_PER_UNIT); |
2338 | if (BYTES_BIG_ENDIAN) | |
2339 | clear_bit_region_be (m, (BITS_PER_UNIT - 1 | |
2340 | - (pos_in_buffer % BITS_PER_UNIT)), | |
2341 | info->bitsize); | |
2342 | else | |
2343 | clear_bit_region (m, pos_in_buffer % BITS_PER_UNIT, info->bitsize); | |
245f6de1 | 2344 | if (cst && dump_file && (dump_flags & TDF_DETAILS)) |
f663d9ad KT |
2345 | { |
2346 | if (ret) | |
2347 | { | |
c94c3532 | 2348 | fputs ("After writing ", dump_file); |
4af78ef8 | 2349 | print_generic_expr (dump_file, cst, TDF_NONE); |
f663d9ad | 2350 | fprintf (dump_file, " of size " HOST_WIDE_INT_PRINT_DEC |
c94c3532 EB |
2351 | " at position %d\n", info->bitsize, pos_in_buffer); |
2352 | fputs (" the merged value contains ", dump_file); | |
f663d9ad | 2353 | dump_char_array (dump_file, val, buf_size); |
c94c3532 EB |
2354 | fputs (" the merged mask contains ", dump_file); |
2355 | dump_char_array (dump_file, mask, buf_size); | |
2356 | if (bit_insertion) | |
2357 | fputs (" bit insertion is required\n", dump_file); | |
e362a897 EB |
2358 | if (string_concatenation) |
2359 | fputs (" string concatenation is required\n", dump_file); | |
f663d9ad KT |
2360 | } |
2361 | else | |
2362 | fprintf (dump_file, "Failed to merge stores\n"); | |
4b84d9b8 | 2363 | } |
f663d9ad KT |
2364 | if (!ret) |
2365 | return false; | |
2366 | } | |
4b84d9b8 | 2367 | stores.qsort (sort_by_bitpos); |
f663d9ad KT |
2368 | return true; |
2369 | } | |
2370 | ||
2371 | /* Structure describing the store chain. */ | |
2372 | ||
6c1dae73 | 2373 | class imm_store_chain_info |
f663d9ad | 2374 | { |
6c1dae73 | 2375 | public: |
50b6d676 AO |
2376 | /* Doubly-linked list that imposes an order on chain processing. |
2377 | PNXP (prev's next pointer) points to the head of a list, or to | |
2378 | the next field in the previous chain in the list. | |
2379 | See pass_store_merging::m_stores_head for more rationale. */ | |
2380 | imm_store_chain_info *next, **pnxp; | |
b5926e23 | 2381 | tree base_addr; |
a62b3dc5 | 2382 | auto_vec<store_immediate_info *> m_store_info; |
f663d9ad KT |
2383 | auto_vec<merged_store_group *> m_merged_store_groups; |
2384 | ||
50b6d676 AO |
2385 | imm_store_chain_info (imm_store_chain_info *&inspt, tree b_a) |
2386 | : next (inspt), pnxp (&inspt), base_addr (b_a) | |
2387 | { | |
2388 | inspt = this; | |
2389 | if (next) | |
2390 | { | |
2391 | gcc_checking_assert (pnxp == next->pnxp); | |
2392 | next->pnxp = &next; | |
2393 | } | |
2394 | } | |
2395 | ~imm_store_chain_info () | |
2396 | { | |
2397 | *pnxp = next; | |
2398 | if (next) | |
2399 | { | |
2400 | gcc_checking_assert (&next == next->pnxp); | |
2401 | next->pnxp = pnxp; | |
2402 | } | |
2403 | } | |
b5926e23 | 2404 | bool terminate_and_process_chain (); |
bd909071 JJ |
2405 | bool try_coalesce_bswap (merged_store_group *, unsigned int, unsigned int, |
2406 | unsigned int); | |
f663d9ad | 2407 | bool coalesce_immediate_stores (); |
b5926e23 RB |
2408 | bool output_merged_store (merged_store_group *); |
2409 | bool output_merged_stores (); | |
f663d9ad KT |
2410 | }; |
2411 | ||
2412 | const pass_data pass_data_tree_store_merging = { | |
2413 | GIMPLE_PASS, /* type */ | |
2414 | "store-merging", /* name */ | |
2415 | OPTGROUP_NONE, /* optinfo_flags */ | |
2416 | TV_GIMPLE_STORE_MERGING, /* tv_id */ | |
2417 | PROP_ssa, /* properties_required */ | |
2418 | 0, /* properties_provided */ | |
2419 | 0, /* properties_destroyed */ | |
2420 | 0, /* todo_flags_start */ | |
2421 | TODO_update_ssa, /* todo_flags_finish */ | |
2422 | }; | |
2423 | ||
2424 | class pass_store_merging : public gimple_opt_pass | |
2425 | { | |
2426 | public: | |
2427 | pass_store_merging (gcc::context *ctxt) | |
95d94b52 RB |
2428 | : gimple_opt_pass (pass_data_tree_store_merging, ctxt), m_stores_head (), |
2429 | m_n_chains (0), m_n_stores (0) | |
f663d9ad KT |
2430 | { |
2431 | } | |
2432 | ||
c94c3532 EB |
2433 | /* Pass not supported for PDP-endian, nor for insane hosts or |
2434 | target character sizes where native_{encode,interpret}_expr | |
a62b3dc5 | 2435 | doesn't work properly. */ |
f663d9ad KT |
2436 | virtual bool |
2437 | gate (function *) | |
2438 | { | |
a62b3dc5 | 2439 | return flag_store_merging |
c94c3532 | 2440 | && BYTES_BIG_ENDIAN == WORDS_BIG_ENDIAN |
a62b3dc5 JJ |
2441 | && CHAR_BIT == 8 |
2442 | && BITS_PER_UNIT == 8; | |
f663d9ad KT |
2443 | } |
2444 | ||
2445 | virtual unsigned int execute (function *); | |
2446 | ||
2447 | private: | |
99b1c316 | 2448 | hash_map<tree_operand_hash, class imm_store_chain_info *> m_stores; |
f663d9ad | 2449 | |
50b6d676 AO |
2450 | /* Form a doubly-linked stack of the elements of m_stores, so that |
2451 | we can iterate over them in a predictable way. Using this order | |
2452 | avoids extraneous differences in the compiler output just because | |
2453 | of tree pointer variations (e.g. different chains end up in | |
2454 | different positions of m_stores, so they are handled in different | |
2455 | orders, so they allocate or release SSA names in different | |
2456 | orders, and when they get reused, subsequent passes end up | |
2457 | getting different SSA names, which may ultimately change | |
2458 | decisions when going out of SSA). */ | |
2459 | imm_store_chain_info *m_stores_head; | |
2460 | ||
95d94b52 RB |
2461 | /* The number of store chains currently tracked. */ |
2462 | unsigned m_n_chains; | |
2463 | /* The number of stores currently tracked. */ | |
2464 | unsigned m_n_stores; | |
2465 | ||
629387a6 EB |
2466 | bool process_store (gimple *); |
2467 | bool terminate_and_process_chain (imm_store_chain_info *); | |
383ac8dc | 2468 | bool terminate_all_aliasing_chains (imm_store_chain_info **, gimple *); |
629387a6 | 2469 | bool terminate_and_process_all_chains (); |
f663d9ad KT |
2470 | }; // class pass_store_merging |
2471 | ||
2472 | /* Terminate and process all recorded chains. Return true if any changes | |
2473 | were made. */ | |
2474 | ||
2475 | bool | |
2476 | pass_store_merging::terminate_and_process_all_chains () | |
2477 | { | |
f663d9ad | 2478 | bool ret = false; |
50b6d676 | 2479 | while (m_stores_head) |
629387a6 | 2480 | ret |= terminate_and_process_chain (m_stores_head); |
b119c055 | 2481 | gcc_assert (m_stores.is_empty ()); |
f663d9ad KT |
2482 | return ret; |
2483 | } | |
2484 | ||
383ac8dc JJ |
2485 | /* Terminate all chains that are affected by the statement STMT. |
2486 | CHAIN_INFO is the chain we should ignore from the checks if | |
629387a6 | 2487 | non-NULL. Return true if any changes were made. */ |
f663d9ad KT |
2488 | |
2489 | bool | |
20770eb8 | 2490 | pass_store_merging::terminate_all_aliasing_chains (imm_store_chain_info |
b5926e23 | 2491 | **chain_info, |
f663d9ad KT |
2492 | gimple *stmt) |
2493 | { | |
2494 | bool ret = false; | |
2495 | ||
2496 | /* If the statement doesn't touch memory it can't alias. */ | |
2497 | if (!gimple_vuse (stmt)) | |
2498 | return false; | |
2499 | ||
9e875fd8 | 2500 | tree store_lhs = gimple_store_p (stmt) ? gimple_get_lhs (stmt) : NULL_TREE; |
6b412bf6 RB |
2501 | ao_ref store_lhs_ref; |
2502 | ao_ref_init (&store_lhs_ref, store_lhs); | |
383ac8dc | 2503 | for (imm_store_chain_info *next = m_stores_head, *cur = next; cur; cur = next) |
f663d9ad | 2504 | { |
383ac8dc JJ |
2505 | next = cur->next; |
2506 | ||
2507 | /* We already checked all the stores in chain_info and terminated the | |
2508 | chain if necessary. Skip it here. */ | |
2509 | if (chain_info && *chain_info == cur) | |
2510 | continue; | |
2511 | ||
245f6de1 JJ |
2512 | store_immediate_info *info; |
2513 | unsigned int i; | |
383ac8dc | 2514 | FOR_EACH_VEC_ELT (cur->m_store_info, i, info) |
f663d9ad | 2515 | { |
9e875fd8 | 2516 | tree lhs = gimple_assign_lhs (info->stmt); |
6b412bf6 RB |
2517 | ao_ref lhs_ref; |
2518 | ao_ref_init (&lhs_ref, lhs); | |
2519 | if (ref_maybe_used_by_stmt_p (stmt, &lhs_ref) | |
2520 | || stmt_may_clobber_ref_p_1 (stmt, &lhs_ref) | |
2521 | || (store_lhs && refs_may_alias_p_1 (&store_lhs_ref, | |
2522 | &lhs_ref, false))) | |
f663d9ad | 2523 | { |
245f6de1 | 2524 | if (dump_file && (dump_flags & TDF_DETAILS)) |
f663d9ad | 2525 | { |
245f6de1 JJ |
2526 | fprintf (dump_file, "stmt causes chain termination:\n"); |
2527 | print_gimple_stmt (dump_file, stmt, 0); | |
f663d9ad | 2528 | } |
629387a6 | 2529 | ret |= terminate_and_process_chain (cur); |
245f6de1 | 2530 | break; |
f663d9ad KT |
2531 | } |
2532 | } | |
2533 | } | |
2534 | ||
f663d9ad KT |
2535 | return ret; |
2536 | } | |
2537 | ||
2538 | /* Helper function. Terminate the recorded chain storing to base object | |
2539 | BASE. Return true if the merging and output was successful. The m_stores | |
2540 | entry is removed after the processing in any case. */ | |
2541 | ||
2542 | bool | |
629387a6 | 2543 | pass_store_merging::terminate_and_process_chain (imm_store_chain_info *chain_info) |
f663d9ad | 2544 | { |
95d94b52 RB |
2545 | m_n_stores -= chain_info->m_store_info.length (); |
2546 | m_n_chains--; | |
b5926e23 RB |
2547 | bool ret = chain_info->terminate_and_process_chain (); |
2548 | m_stores.remove (chain_info->base_addr); | |
2549 | delete chain_info; | |
f663d9ad KT |
2550 | return ret; |
2551 | } | |
2552 | ||
245f6de1 | 2553 | /* Return true if stmts in between FIRST (inclusive) and LAST (exclusive) |
629387a6 EB |
2554 | may clobber REF. FIRST and LAST must have non-NULL vdef. We want to |
2555 | be able to sink load of REF across stores between FIRST and LAST, up | |
2556 | to right before LAST. */ | |
245f6de1 JJ |
2557 | |
2558 | bool | |
2559 | stmts_may_clobber_ref_p (gimple *first, gimple *last, tree ref) | |
2560 | { | |
2561 | ao_ref r; | |
2562 | ao_ref_init (&r, ref); | |
2563 | unsigned int count = 0; | |
2564 | tree vop = gimple_vdef (last); | |
2565 | gimple *stmt; | |
2566 | ||
629387a6 EB |
2567 | /* Return true conservatively if the basic blocks are different. */ |
2568 | if (gimple_bb (first) != gimple_bb (last)) | |
2569 | return true; | |
2570 | ||
245f6de1 JJ |
2571 | do |
2572 | { | |
2573 | stmt = SSA_NAME_DEF_STMT (vop); | |
2574 | if (stmt_may_clobber_ref_p_1 (stmt, &r)) | |
2575 | return true; | |
4b84d9b8 JJ |
2576 | if (gimple_store_p (stmt) |
2577 | && refs_anti_dependent_p (ref, gimple_get_lhs (stmt))) | |
2578 | return true; | |
245f6de1 JJ |
2579 | /* Avoid quadratic compile time by bounding the number of checks |
2580 | we perform. */ | |
2581 | if (++count > MAX_STORE_ALIAS_CHECKS) | |
2582 | return true; | |
2583 | vop = gimple_vuse (stmt); | |
2584 | } | |
2585 | while (stmt != first); | |
629387a6 | 2586 | |
245f6de1 JJ |
2587 | return false; |
2588 | } | |
2589 | ||
2590 | /* Return true if INFO->ops[IDX] is mergeable with the | |
2591 | corresponding loads already in MERGED_STORE group. | |
2592 | BASE_ADDR is the base address of the whole store group. */ | |
2593 | ||
2594 | bool | |
2595 | compatible_load_p (merged_store_group *merged_store, | |
2596 | store_immediate_info *info, | |
2597 | tree base_addr, int idx) | |
2598 | { | |
2599 | store_immediate_info *infof = merged_store->stores[0]; | |
2600 | if (!info->ops[idx].base_addr | |
8a91d545 RS |
2601 | || maybe_ne (info->ops[idx].bitpos - infof->ops[idx].bitpos, |
2602 | info->bitpos - infof->bitpos) | |
245f6de1 JJ |
2603 | || !operand_equal_p (info->ops[idx].base_addr, |
2604 | infof->ops[idx].base_addr, 0)) | |
2605 | return false; | |
2606 | ||
2607 | store_immediate_info *infol = merged_store->stores.last (); | |
2608 | tree load_vuse = gimple_vuse (info->ops[idx].stmt); | |
2609 | /* In this case all vuses should be the same, e.g. | |
2610 | _1 = s.a; _2 = s.b; _3 = _1 | 1; t.a = _3; _4 = _2 | 2; t.b = _4; | |
2611 | or | |
2612 | _1 = s.a; _2 = s.b; t.a = _1; t.b = _2; | |
2613 | and we can emit the coalesced load next to any of those loads. */ | |
2614 | if (gimple_vuse (infof->ops[idx].stmt) == load_vuse | |
2615 | && gimple_vuse (infol->ops[idx].stmt) == load_vuse) | |
2616 | return true; | |
2617 | ||
2618 | /* Otherwise, at least for now require that the load has the same | |
2619 | vuse as the store. See following examples. */ | |
2620 | if (gimple_vuse (info->stmt) != load_vuse) | |
2621 | return false; | |
2622 | ||
2623 | if (gimple_vuse (infof->stmt) != gimple_vuse (infof->ops[idx].stmt) | |
2624 | || (infof != infol | |
2625 | && gimple_vuse (infol->stmt) != gimple_vuse (infol->ops[idx].stmt))) | |
2626 | return false; | |
2627 | ||
2628 | /* If the load is from the same location as the store, already | |
2629 | the construction of the immediate chain info guarantees no intervening | |
2630 | stores, so no further checks are needed. Example: | |
2631 | _1 = s.a; _2 = _1 & -7; s.a = _2; _3 = s.b; _4 = _3 & -7; s.b = _4; */ | |
8a91d545 | 2632 | if (known_eq (info->ops[idx].bitpos, info->bitpos) |
245f6de1 JJ |
2633 | && operand_equal_p (info->ops[idx].base_addr, base_addr, 0)) |
2634 | return true; | |
2635 | ||
2636 | /* Otherwise, we need to punt if any of the loads can be clobbered by any | |
2637 | of the stores in the group, or any other stores in between those. | |
2638 | Previous calls to compatible_load_p ensured that for all the | |
2639 | merged_store->stores IDX loads, no stmts starting with | |
2640 | merged_store->first_stmt and ending right before merged_store->last_stmt | |
2641 | clobbers those loads. */ | |
2642 | gimple *first = merged_store->first_stmt; | |
2643 | gimple *last = merged_store->last_stmt; | |
245f6de1 JJ |
2644 | /* The stores are sorted by increasing store bitpos, so if info->stmt store |
2645 | comes before the so far first load, we'll be changing | |
2646 | merged_store->first_stmt. In that case we need to give up if | |
2647 | any of the earlier processed loads clobber with the stmts in the new | |
2648 | range. */ | |
2649 | if (info->order < merged_store->first_order) | |
2650 | { | |
3f207ab3 | 2651 | for (store_immediate_info *infoc : merged_store->stores) |
245f6de1 JJ |
2652 | if (stmts_may_clobber_ref_p (info->stmt, first, infoc->ops[idx].val)) |
2653 | return false; | |
2654 | first = info->stmt; | |
2655 | } | |
2656 | /* Similarly, we could change merged_store->last_stmt, so ensure | |
2657 | in that case no stmts in the new range clobber any of the earlier | |
2658 | processed loads. */ | |
2659 | else if (info->order > merged_store->last_order) | |
2660 | { | |
3f207ab3 | 2661 | for (store_immediate_info *infoc : merged_store->stores) |
245f6de1 JJ |
2662 | if (stmts_may_clobber_ref_p (last, info->stmt, infoc->ops[idx].val)) |
2663 | return false; | |
2664 | last = info->stmt; | |
2665 | } | |
2666 | /* And finally, we'd be adding a new load to the set, ensure it isn't | |
2667 | clobbered in the new range. */ | |
2668 | if (stmts_may_clobber_ref_p (first, last, info->ops[idx].val)) | |
2669 | return false; | |
2670 | ||
2671 | /* Otherwise, we are looking for: | |
2672 | _1 = s.a; _2 = _1 ^ 15; t.a = _2; _3 = s.b; _4 = _3 ^ 15; t.b = _4; | |
2673 | or | |
2674 | _1 = s.a; t.a = _1; _2 = s.b; t.b = _2; */ | |
2675 | return true; | |
2676 | } | |
2677 | ||
4b84d9b8 JJ |
2678 | /* Add all refs loaded to compute VAL to REFS vector. */ |
2679 | ||
2680 | void | |
2681 | gather_bswap_load_refs (vec<tree> *refs, tree val) | |
2682 | { | |
2683 | if (TREE_CODE (val) != SSA_NAME) | |
2684 | return; | |
2685 | ||
2686 | gimple *stmt = SSA_NAME_DEF_STMT (val); | |
2687 | if (!is_gimple_assign (stmt)) | |
2688 | return; | |
2689 | ||
2690 | if (gimple_assign_load_p (stmt)) | |
2691 | { | |
2692 | refs->safe_push (gimple_assign_rhs1 (stmt)); | |
2693 | return; | |
2694 | } | |
2695 | ||
2696 | switch (gimple_assign_rhs_class (stmt)) | |
2697 | { | |
2698 | case GIMPLE_BINARY_RHS: | |
2699 | gather_bswap_load_refs (refs, gimple_assign_rhs2 (stmt)); | |
2700 | /* FALLTHRU */ | |
2701 | case GIMPLE_UNARY_RHS: | |
2702 | gather_bswap_load_refs (refs, gimple_assign_rhs1 (stmt)); | |
2703 | break; | |
2704 | default: | |
2705 | gcc_unreachable (); | |
2706 | } | |
2707 | } | |
2708 | ||
c5679c37 JJ |
2709 | /* Check if there are any stores in M_STORE_INFO after index I |
2710 | (where M_STORE_INFO must be sorted by sort_by_bitpos) that overlap | |
2711 | a potential group ending with END that have their order | |
4d213bf6 JJ |
2712 | smaller than LAST_ORDER. ALL_INTEGER_CST_P is true if |
2713 | all the stores already merged and the one under consideration | |
2714 | have rhs_code of INTEGER_CST. Return true if there are no such stores. | |
c5679c37 JJ |
2715 | Consider: |
2716 | MEM[(long long int *)p_28] = 0; | |
2717 | MEM[(long long int *)p_28 + 8B] = 0; | |
2718 | MEM[(long long int *)p_28 + 16B] = 0; | |
2719 | MEM[(long long int *)p_28 + 24B] = 0; | |
2720 | _129 = (int) _130; | |
2721 | MEM[(int *)p_28 + 8B] = _129; | |
2722 | MEM[(int *)p_28].a = -1; | |
2723 | We already have | |
2724 | MEM[(long long int *)p_28] = 0; | |
2725 | MEM[(int *)p_28].a = -1; | |
2726 | stmts in the current group and need to consider if it is safe to | |
2727 | add MEM[(long long int *)p_28 + 8B] = 0; store into the same group. | |
2728 | There is an overlap between that store and the MEM[(int *)p_28 + 8B] = _129; | |
2729 | store though, so if we add the MEM[(long long int *)p_28 + 8B] = 0; | |
2730 | into the group and merging of those 3 stores is successful, merged | |
2731 | stmts will be emitted at the latest store from that group, i.e. | |
2732 | LAST_ORDER, which is the MEM[(int *)p_28].a = -1; store. | |
2733 | The MEM[(int *)p_28 + 8B] = _129; store that originally follows | |
2734 | the MEM[(long long int *)p_28 + 8B] = 0; would now be before it, | |
2735 | so we need to refuse merging MEM[(long long int *)p_28 + 8B] = 0; | |
2736 | into the group. That way it will be its own store group and will | |
4d213bf6 | 2737 | not be touched. If ALL_INTEGER_CST_P and there are overlapping |
c5679c37 | 2738 | INTEGER_CST stores, those are mergeable using merge_overlapping, |
bd909071 JJ |
2739 | so don't return false for those. |
2740 | ||
2741 | Similarly, check stores from FIRST_EARLIER (inclusive) to END_EARLIER | |
2742 | (exclusive), whether they don't overlap the bitrange START to END | |
2743 | and have order in between FIRST_ORDER and LAST_ORDER. This is to | |
2744 | prevent merging in cases like: | |
2745 | MEM <char[12]> [&b + 8B] = {}; | |
2746 | MEM[(short *) &b] = 5; | |
2747 | _5 = *x_4(D); | |
2748 | MEM <long long unsigned int> [&b + 2B] = _5; | |
2749 | MEM[(char *)&b + 16B] = 88; | |
2750 | MEM[(int *)&b + 20B] = 1; | |
2751 | The = {} store comes in sort_by_bitpos before the = 88 store, and can't | |
2752 | be merged with it, because the = _5 store overlaps these and is in between | |
2753 | them in sort_by_order ordering. If it was merged, the merged store would | |
2754 | go after the = _5 store and thus change behavior. */ | |
c5679c37 JJ |
2755 | |
2756 | static bool | |
00dcc88a MS |
2757 | check_no_overlap (const vec<store_immediate_info *> &m_store_info, |
2758 | unsigned int i, | |
bd909071 JJ |
2759 | bool all_integer_cst_p, unsigned int first_order, |
2760 | unsigned int last_order, unsigned HOST_WIDE_INT start, | |
2761 | unsigned HOST_WIDE_INT end, unsigned int first_earlier, | |
2762 | unsigned end_earlier) | |
c5679c37 JJ |
2763 | { |
2764 | unsigned int len = m_store_info.length (); | |
bd909071 JJ |
2765 | for (unsigned int j = first_earlier; j < end_earlier; j++) |
2766 | { | |
2767 | store_immediate_info *info = m_store_info[j]; | |
2768 | if (info->order > first_order | |
2769 | && info->order < last_order | |
2770 | && info->bitpos + info->bitsize > start) | |
2771 | return false; | |
2772 | } | |
c5679c37 JJ |
2773 | for (++i; i < len; ++i) |
2774 | { | |
2775 | store_immediate_info *info = m_store_info[i]; | |
2776 | if (info->bitpos >= end) | |
2777 | break; | |
2778 | if (info->order < last_order | |
4d213bf6 | 2779 | && (!all_integer_cst_p || info->rhs_code != INTEGER_CST)) |
c5679c37 JJ |
2780 | return false; |
2781 | } | |
2782 | return true; | |
2783 | } | |
2784 | ||
4b84d9b8 JJ |
2785 | /* Return true if m_store_info[first] and at least one following store |
2786 | form a group which store try_size bitsize value which is byte swapped | |
2787 | from a memory load or some value, or identity from some value. | |
2788 | This uses the bswap pass APIs. */ | |
2789 | ||
2790 | bool | |
2791 | imm_store_chain_info::try_coalesce_bswap (merged_store_group *merged_store, | |
2792 | unsigned int first, | |
bd909071 JJ |
2793 | unsigned int try_size, |
2794 | unsigned int first_earlier) | |
4b84d9b8 JJ |
2795 | { |
2796 | unsigned int len = m_store_info.length (), last = first; | |
2797 | unsigned HOST_WIDE_INT width = m_store_info[first]->bitsize; | |
2798 | if (width >= try_size) | |
2799 | return false; | |
2800 | for (unsigned int i = first + 1; i < len; ++i) | |
2801 | { | |
2802 | if (m_store_info[i]->bitpos != m_store_info[first]->bitpos + width | |
cb76fcd7 | 2803 | || m_store_info[i]->lp_nr != merged_store->lp_nr |
4b84d9b8 JJ |
2804 | || m_store_info[i]->ins_stmt == NULL) |
2805 | return false; | |
2806 | width += m_store_info[i]->bitsize; | |
2807 | if (width >= try_size) | |
2808 | { | |
2809 | last = i; | |
2810 | break; | |
2811 | } | |
2812 | } | |
2813 | if (width != try_size) | |
2814 | return false; | |
2815 | ||
2816 | bool allow_unaligned | |
028d4092 | 2817 | = !STRICT_ALIGNMENT && param_store_merging_allow_unaligned; |
4b84d9b8 JJ |
2818 | /* Punt if the combined store would not be aligned and we need alignment. */ |
2819 | if (!allow_unaligned) | |
2820 | { | |
2821 | unsigned int align = merged_store->align; | |
2822 | unsigned HOST_WIDE_INT align_base = merged_store->align_base; | |
2823 | for (unsigned int i = first + 1; i <= last; ++i) | |
2824 | { | |
2825 | unsigned int this_align; | |
2826 | unsigned HOST_WIDE_INT align_bitpos = 0; | |
2827 | get_object_alignment_1 (gimple_assign_lhs (m_store_info[i]->stmt), | |
2828 | &this_align, &align_bitpos); | |
2829 | if (this_align > align) | |
2830 | { | |
2831 | align = this_align; | |
2832 | align_base = m_store_info[i]->bitpos - align_bitpos; | |
2833 | } | |
2834 | } | |
2835 | unsigned HOST_WIDE_INT align_bitpos | |
2836 | = (m_store_info[first]->bitpos - align_base) & (align - 1); | |
2837 | if (align_bitpos) | |
2838 | align = least_bit_hwi (align_bitpos); | |
2839 | if (align < try_size) | |
2840 | return false; | |
2841 | } | |
2842 | ||
2843 | tree type; | |
2844 | switch (try_size) | |
2845 | { | |
2846 | case 16: type = uint16_type_node; break; | |
2847 | case 32: type = uint32_type_node; break; | |
2848 | case 64: type = uint64_type_node; break; | |
2849 | default: gcc_unreachable (); | |
2850 | } | |
2851 | struct symbolic_number n; | |
2852 | gimple *ins_stmt = NULL; | |
2853 | int vuse_store = -1; | |
2854 | unsigned int first_order = merged_store->first_order; | |
2855 | unsigned int last_order = merged_store->last_order; | |
2856 | gimple *first_stmt = merged_store->first_stmt; | |
2857 | gimple *last_stmt = merged_store->last_stmt; | |
c5679c37 | 2858 | unsigned HOST_WIDE_INT end = merged_store->start + merged_store->width; |
4b84d9b8 JJ |
2859 | store_immediate_info *infof = m_store_info[first]; |
2860 | ||
2861 | for (unsigned int i = first; i <= last; ++i) | |
2862 | { | |
2863 | store_immediate_info *info = m_store_info[i]; | |
2864 | struct symbolic_number this_n = info->n; | |
2865 | this_n.type = type; | |
2866 | if (!this_n.base_addr) | |
2867 | this_n.range = try_size / BITS_PER_UNIT; | |
30fa8e9c JJ |
2868 | else |
2869 | /* Update vuse in case it has changed by output_merged_stores. */ | |
2870 | this_n.vuse = gimple_vuse (info->ins_stmt); | |
4b84d9b8 JJ |
2871 | unsigned int bitpos = info->bitpos - infof->bitpos; |
2872 | if (!do_shift_rotate (LSHIFT_EXPR, &this_n, | |
2873 | BYTES_BIG_ENDIAN | |
2874 | ? try_size - info->bitsize - bitpos | |
2875 | : bitpos)) | |
2876 | return false; | |
aa11164a | 2877 | if (this_n.base_addr && vuse_store) |
4b84d9b8 JJ |
2878 | { |
2879 | unsigned int j; | |
2880 | for (j = first; j <= last; ++j) | |
2881 | if (this_n.vuse == gimple_vuse (m_store_info[j]->stmt)) | |
2882 | break; | |
2883 | if (j > last) | |
2884 | { | |
2885 | if (vuse_store == 1) | |
2886 | return false; | |
2887 | vuse_store = 0; | |
2888 | } | |
2889 | } | |
2890 | if (i == first) | |
2891 | { | |
2892 | n = this_n; | |
2893 | ins_stmt = info->ins_stmt; | |
2894 | } | |
2895 | else | |
2896 | { | |
c5679c37 | 2897 | if (n.base_addr && n.vuse != this_n.vuse) |
4b84d9b8 | 2898 | { |
c5679c37 JJ |
2899 | if (vuse_store == 0) |
2900 | return false; | |
2901 | vuse_store = 1; | |
4b84d9b8 | 2902 | } |
c5679c37 JJ |
2903 | if (info->order > last_order) |
2904 | { | |
2905 | last_order = info->order; | |
2906 | last_stmt = info->stmt; | |
2907 | } | |
2908 | else if (info->order < first_order) | |
2909 | { | |
2910 | first_order = info->order; | |
2911 | first_stmt = info->stmt; | |
2912 | } | |
2913 | end = MAX (end, info->bitpos + info->bitsize); | |
4b84d9b8 JJ |
2914 | |
2915 | ins_stmt = perform_symbolic_merge (ins_stmt, &n, info->ins_stmt, | |
04eccbbe | 2916 | &this_n, &n, BIT_IOR_EXPR); |
4b84d9b8 JJ |
2917 | if (ins_stmt == NULL) |
2918 | return false; | |
2919 | } | |
2920 | } | |
2921 | ||
2922 | uint64_t cmpxchg, cmpnop; | |
b320edc0 JJ |
2923 | bool cast64_to_32; |
2924 | find_bswap_or_nop_finalize (&n, &cmpxchg, &cmpnop, &cast64_to_32); | |
4b84d9b8 JJ |
2925 | |
2926 | /* A complete byte swap should make the symbolic number to start with | |
2927 | the largest digit in the highest order byte. Unchanged symbolic | |
2928 | number indicates a read with same endianness as target architecture. */ | |
2929 | if (n.n != cmpnop && n.n != cmpxchg) | |
2930 | return false; | |
2931 | ||
b320edc0 JJ |
2932 | /* For now. */ |
2933 | if (cast64_to_32) | |
2934 | return false; | |
2935 | ||
4b84d9b8 JJ |
2936 | if (n.base_addr == NULL_TREE && !is_gimple_val (n.src)) |
2937 | return false; | |
2938 | ||
bd909071 JJ |
2939 | if (!check_no_overlap (m_store_info, last, false, first_order, last_order, |
2940 | merged_store->start, end, first_earlier, first)) | |
c5679c37 JJ |
2941 | return false; |
2942 | ||
4b84d9b8 JJ |
2943 | /* Don't handle memory copy this way if normal non-bswap processing |
2944 | would handle it too. */ | |
2945 | if (n.n == cmpnop && (unsigned) n.n_ops == last - first + 1) | |
2946 | { | |
2947 | unsigned int i; | |
2948 | for (i = first; i <= last; ++i) | |
2949 | if (m_store_info[i]->rhs_code != MEM_REF) | |
2950 | break; | |
2951 | if (i == last + 1) | |
2952 | return false; | |
2953 | } | |
2954 | ||
2955 | if (n.n == cmpxchg) | |
2956 | switch (try_size) | |
2957 | { | |
2958 | case 16: | |
2959 | /* Will emit LROTATE_EXPR. */ | |
2960 | break; | |
2961 | case 32: | |
2962 | if (builtin_decl_explicit_p (BUILT_IN_BSWAP32) | |
2963 | && optab_handler (bswap_optab, SImode) != CODE_FOR_nothing) | |
2964 | break; | |
2965 | return false; | |
2966 | case 64: | |
2967 | if (builtin_decl_explicit_p (BUILT_IN_BSWAP64) | |
2968 | && optab_handler (bswap_optab, DImode) != CODE_FOR_nothing) | |
2969 | break; | |
2970 | return false; | |
2971 | default: | |
2972 | gcc_unreachable (); | |
2973 | } | |
2974 | ||
2975 | if (!allow_unaligned && n.base_addr) | |
2976 | { | |
2977 | unsigned int align = get_object_alignment (n.src); | |
2978 | if (align < try_size) | |
2979 | return false; | |
2980 | } | |
2981 | ||
2982 | /* If each load has vuse of the corresponding store, need to verify | |
2983 | the loads can be sunk right before the last store. */ | |
2984 | if (vuse_store == 1) | |
2985 | { | |
2986 | auto_vec<tree, 64> refs; | |
2987 | for (unsigned int i = first; i <= last; ++i) | |
2988 | gather_bswap_load_refs (&refs, | |
2989 | gimple_assign_rhs1 (m_store_info[i]->stmt)); | |
2990 | ||
3f207ab3 | 2991 | for (tree ref : refs) |
4b84d9b8 JJ |
2992 | if (stmts_may_clobber_ref_p (first_stmt, last_stmt, ref)) |
2993 | return false; | |
2994 | n.vuse = NULL_TREE; | |
2995 | } | |
2996 | ||
2997 | infof->n = n; | |
2998 | infof->ins_stmt = ins_stmt; | |
2999 | for (unsigned int i = first; i <= last; ++i) | |
3000 | { | |
3001 | m_store_info[i]->rhs_code = n.n == cmpxchg ? LROTATE_EXPR : NOP_EXPR; | |
3002 | m_store_info[i]->ops[0].base_addr = NULL_TREE; | |
3003 | m_store_info[i]->ops[1].base_addr = NULL_TREE; | |
3004 | if (i != first) | |
3005 | merged_store->merge_into (m_store_info[i]); | |
3006 | } | |
3007 | ||
3008 | return true; | |
3009 | } | |
3010 | ||
f663d9ad KT |
3011 | /* Go through the candidate stores recorded in m_store_info and merge them |
3012 | into merged_store_group objects recorded into m_merged_store_groups | |
3013 | representing the widened stores. Return true if coalescing was successful | |
3014 | and the number of widened stores is fewer than the original number | |
3015 | of stores. */ | |
3016 | ||
3017 | bool | |
3018 | imm_store_chain_info::coalesce_immediate_stores () | |
3019 | { | |
3020 | /* Anything less can't be processed. */ | |
3021 | if (m_store_info.length () < 2) | |
3022 | return false; | |
3023 | ||
3024 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
c94c3532 | 3025 | fprintf (dump_file, "Attempting to coalesce %u stores in chain\n", |
f663d9ad KT |
3026 | m_store_info.length ()); |
3027 | ||
3028 | store_immediate_info *info; | |
4b84d9b8 | 3029 | unsigned int i, ignore = 0; |
bd909071 JJ |
3030 | unsigned int first_earlier = 0; |
3031 | unsigned int end_earlier = 0; | |
f663d9ad KT |
3032 | |
3033 | /* Order the stores by the bitposition they write to. */ | |
3034 | m_store_info.qsort (sort_by_bitpos); | |
3035 | ||
3036 | info = m_store_info[0]; | |
3037 | merged_store_group *merged_store = new merged_store_group (info); | |
c94c3532 EB |
3038 | if (dump_file && (dump_flags & TDF_DETAILS)) |
3039 | fputs ("New store group\n", dump_file); | |
f663d9ad KT |
3040 | |
3041 | FOR_EACH_VEC_ELT (m_store_info, i, info) | |
3042 | { | |
3afd514b JJ |
3043 | unsigned HOST_WIDE_INT new_bitregion_start, new_bitregion_end; |
3044 | ||
4b84d9b8 | 3045 | if (i <= ignore) |
c94c3532 | 3046 | goto done; |
f663d9ad | 3047 | |
bd909071 JJ |
3048 | while (first_earlier < end_earlier |
3049 | && (m_store_info[first_earlier]->bitpos | |
3050 | + m_store_info[first_earlier]->bitsize | |
3051 | <= merged_store->start)) | |
3052 | first_earlier++; | |
3053 | ||
4b84d9b8 JJ |
3054 | /* First try to handle group of stores like: |
3055 | p[0] = data >> 24; | |
3056 | p[1] = data >> 16; | |
3057 | p[2] = data >> 8; | |
3058 | p[3] = data; | |
3059 | using the bswap framework. */ | |
3060 | if (info->bitpos == merged_store->start + merged_store->width | |
3061 | && merged_store->stores.length () == 1 | |
3062 | && merged_store->stores[0]->ins_stmt != NULL | |
cb76fcd7 | 3063 | && info->lp_nr == merged_store->lp_nr |
4b84d9b8 JJ |
3064 | && info->ins_stmt != NULL) |
3065 | { | |
3066 | unsigned int try_size; | |
3067 | for (try_size = 64; try_size >= 16; try_size >>= 1) | |
bd909071 JJ |
3068 | if (try_coalesce_bswap (merged_store, i - 1, try_size, |
3069 | first_earlier)) | |
4b84d9b8 JJ |
3070 | break; |
3071 | ||
3072 | if (try_size >= 16) | |
3073 | { | |
3074 | ignore = i + merged_store->stores.length () - 1; | |
3075 | m_merged_store_groups.safe_push (merged_store); | |
3076 | if (ignore < m_store_info.length ()) | |
bd909071 JJ |
3077 | { |
3078 | merged_store = new merged_store_group (m_store_info[ignore]); | |
3079 | end_earlier = ignore; | |
3080 | } | |
4b84d9b8 JJ |
3081 | else |
3082 | merged_store = NULL; | |
c94c3532 | 3083 | goto done; |
4b84d9b8 JJ |
3084 | } |
3085 | } | |
3086 | ||
3afd514b JJ |
3087 | new_bitregion_start |
3088 | = MIN (merged_store->bitregion_start, info->bitregion_start); | |
3089 | new_bitregion_end | |
3090 | = MAX (merged_store->bitregion_end, info->bitregion_end); | |
3091 | ||
3092 | if (info->order >= merged_store->first_nonmergeable_order | |
3093 | || (((new_bitregion_end - new_bitregion_start + 1) / BITS_PER_UNIT) | |
028d4092 | 3094 | > (unsigned) param_store_merging_max_size)) |
18e0c3d1 JJ |
3095 | ; |
3096 | ||
f663d9ad KT |
3097 | /* |---store 1---| |
3098 | |---store 2---| | |
4b84d9b8 | 3099 | Overlapping stores. */ |
18e0c3d1 | 3100 | else if (IN_RANGE (info->bitpos, merged_store->start, |
4d213bf6 JJ |
3101 | merged_store->start + merged_store->width - 1) |
3102 | /* |---store 1---||---store 2---| | |
3103 | Handle also the consecutive INTEGER_CST stores case here, | |
3104 | as we have here the code to deal with overlaps. */ | |
3105 | || (info->bitregion_start <= merged_store->bitregion_end | |
3106 | && info->rhs_code == INTEGER_CST | |
3107 | && merged_store->only_constants | |
3108 | && merged_store->can_be_merged_into (info))) | |
f663d9ad | 3109 | { |
245f6de1 | 3110 | /* Only allow overlapping stores of constants. */ |
629387a6 EB |
3111 | if (info->rhs_code == INTEGER_CST |
3112 | && merged_store->only_constants | |
3113 | && info->lp_nr == merged_store->lp_nr) | |
245f6de1 | 3114 | { |
bd909071 JJ |
3115 | unsigned int first_order |
3116 | = MIN (merged_store->first_order, info->order); | |
6cd4c66e JJ |
3117 | unsigned int last_order |
3118 | = MAX (merged_store->last_order, info->order); | |
3119 | unsigned HOST_WIDE_INT end | |
3120 | = MAX (merged_store->start + merged_store->width, | |
3121 | info->bitpos + info->bitsize); | |
bd909071 JJ |
3122 | if (check_no_overlap (m_store_info, i, true, first_order, |
3123 | last_order, merged_store->start, end, | |
3124 | first_earlier, end_earlier)) | |
6cd4c66e JJ |
3125 | { |
3126 | /* check_no_overlap call above made sure there are no | |
3127 | overlapping stores with non-INTEGER_CST rhs_code | |
3128 | in between the first and last of the stores we've | |
3129 | just merged. If there are any INTEGER_CST rhs_code | |
3130 | stores in between, we need to merge_overlapping them | |
3131 | even if in the sort_by_bitpos order there are other | |
3132 | overlapping stores in between. Keep those stores as is. | |
3133 | Example: | |
3134 | MEM[(int *)p_28] = 0; | |
3135 | MEM[(char *)p_28 + 3B] = 1; | |
3136 | MEM[(char *)p_28 + 1B] = 2; | |
3137 | MEM[(char *)p_28 + 2B] = MEM[(char *)p_28 + 6B]; | |
3138 | We can't merge the zero store with the store of two and | |
3139 | not merge anything else, because the store of one is | |
3140 | in the original order in between those two, but in | |
3141 | store_by_bitpos order it comes after the last store that | |
3142 | we can't merge with them. We can merge the first 3 stores | |
3143 | and keep the last store as is though. */ | |
18e0c3d1 JJ |
3144 | unsigned int len = m_store_info.length (); |
3145 | unsigned int try_order = last_order; | |
3146 | unsigned int first_nonmergeable_order; | |
3147 | unsigned int k; | |
3148 | bool last_iter = false; | |
3149 | int attempts = 0; | |
3150 | do | |
6cd4c66e | 3151 | { |
18e0c3d1 | 3152 | unsigned int max_order = 0; |
bd909071 | 3153 | unsigned int min_order = first_order; |
18e0c3d1 JJ |
3154 | unsigned first_nonmergeable_int_order = ~0U; |
3155 | unsigned HOST_WIDE_INT this_end = end; | |
3156 | k = i; | |
3157 | first_nonmergeable_order = ~0U; | |
3158 | for (unsigned int j = i + 1; j < len; ++j) | |
6cd4c66e | 3159 | { |
18e0c3d1 JJ |
3160 | store_immediate_info *info2 = m_store_info[j]; |
3161 | if (info2->bitpos >= this_end) | |
3162 | break; | |
3163 | if (info2->order < try_order) | |
6cd4c66e | 3164 | { |
4119cd69 JJ |
3165 | if (info2->rhs_code != INTEGER_CST |
3166 | || info2->lp_nr != merged_store->lp_nr) | |
18e0c3d1 JJ |
3167 | { |
3168 | /* Normally check_no_overlap makes sure this | |
3169 | doesn't happen, but if end grows below, | |
3170 | then we need to process more stores than | |
3171 | check_no_overlap verified. Example: | |
3172 | MEM[(int *)p_5] = 0; | |
3173 | MEM[(short *)p_5 + 3B] = 1; | |
3174 | MEM[(char *)p_5 + 4B] = _9; | |
3175 | MEM[(char *)p_5 + 2B] = 2; */ | |
3176 | k = 0; | |
3177 | break; | |
3178 | } | |
3179 | k = j; | |
bd909071 | 3180 | min_order = MIN (min_order, info2->order); |
18e0c3d1 JJ |
3181 | this_end = MAX (this_end, |
3182 | info2->bitpos + info2->bitsize); | |
6cd4c66e | 3183 | } |
18e0c3d1 | 3184 | else if (info2->rhs_code == INTEGER_CST |
4119cd69 | 3185 | && info2->lp_nr == merged_store->lp_nr |
18e0c3d1 JJ |
3186 | && !last_iter) |
3187 | { | |
3188 | max_order = MAX (max_order, info2->order + 1); | |
3189 | first_nonmergeable_int_order | |
3190 | = MIN (first_nonmergeable_int_order, | |
3191 | info2->order); | |
3192 | } | |
3193 | else | |
3194 | first_nonmergeable_order | |
3195 | = MIN (first_nonmergeable_order, info2->order); | |
6cd4c66e | 3196 | } |
bd909071 JJ |
3197 | if (k > i |
3198 | && !check_no_overlap (m_store_info, len - 1, true, | |
3199 | min_order, try_order, | |
3200 | merged_store->start, this_end, | |
3201 | first_earlier, end_earlier)) | |
3202 | k = 0; | |
18e0c3d1 JJ |
3203 | if (k == 0) |
3204 | { | |
3205 | if (last_order == try_order) | |
3206 | break; | |
3207 | /* If this failed, but only because we grew | |
3208 | try_order, retry with the last working one, | |
3209 | so that we merge at least something. */ | |
3210 | try_order = last_order; | |
3211 | last_iter = true; | |
3212 | continue; | |
3213 | } | |
3214 | last_order = try_order; | |
3215 | /* Retry with a larger try_order to see if we could | |
3216 | merge some further INTEGER_CST stores. */ | |
3217 | if (max_order | |
3218 | && (first_nonmergeable_int_order | |
3219 | < first_nonmergeable_order)) | |
3220 | { | |
3221 | try_order = MIN (max_order, | |
3222 | first_nonmergeable_order); | |
3223 | try_order | |
3224 | = MIN (try_order, | |
3225 | merged_store->first_nonmergeable_order); | |
3226 | if (try_order > last_order && ++attempts < 16) | |
3227 | continue; | |
3228 | } | |
3229 | first_nonmergeable_order | |
3230 | = MIN (first_nonmergeable_order, | |
3231 | first_nonmergeable_int_order); | |
3232 | end = this_end; | |
3233 | break; | |
6cd4c66e | 3234 | } |
18e0c3d1 | 3235 | while (1); |
6cd4c66e JJ |
3236 | |
3237 | if (k != 0) | |
3238 | { | |
3239 | merged_store->merge_overlapping (info); | |
3240 | ||
18e0c3d1 JJ |
3241 | merged_store->first_nonmergeable_order |
3242 | = MIN (merged_store->first_nonmergeable_order, | |
3243 | first_nonmergeable_order); | |
3244 | ||
6cd4c66e JJ |
3245 | for (unsigned int j = i + 1; j <= k; j++) |
3246 | { | |
3247 | store_immediate_info *info2 = m_store_info[j]; | |
3248 | gcc_assert (info2->bitpos < end); | |
3249 | if (info2->order < last_order) | |
3250 | { | |
3251 | gcc_assert (info2->rhs_code == INTEGER_CST); | |
18e0c3d1 JJ |
3252 | if (info != info2) |
3253 | merged_store->merge_overlapping (info2); | |
6cd4c66e JJ |
3254 | } |
3255 | /* Other stores are kept and not merged in any | |
3256 | way. */ | |
3257 | } | |
3258 | ignore = k; | |
3259 | goto done; | |
3260 | } | |
3261 | } | |
245f6de1 | 3262 | } |
f663d9ad | 3263 | } |
245f6de1 JJ |
3264 | /* |---store 1---||---store 2---| |
3265 | This store is consecutive to the previous one. | |
3266 | Merge it into the current store group. There can be gaps in between | |
3267 | the stores, but there can't be gaps in between bitregions. */ | |
c94c3532 | 3268 | else if (info->bitregion_start <= merged_store->bitregion_end |
7f5a3982 | 3269 | && merged_store->can_be_merged_into (info)) |
f663d9ad | 3270 | { |
245f6de1 JJ |
3271 | store_immediate_info *infof = merged_store->stores[0]; |
3272 | ||
3273 | /* All the rhs_code ops that take 2 operands are commutative, | |
3274 | swap the operands if it could make the operands compatible. */ | |
3275 | if (infof->ops[0].base_addr | |
3276 | && infof->ops[1].base_addr | |
3277 | && info->ops[0].base_addr | |
3278 | && info->ops[1].base_addr | |
8a91d545 RS |
3279 | && known_eq (info->ops[1].bitpos - infof->ops[0].bitpos, |
3280 | info->bitpos - infof->bitpos) | |
245f6de1 JJ |
3281 | && operand_equal_p (info->ops[1].base_addr, |
3282 | infof->ops[0].base_addr, 0)) | |
127ef369 JJ |
3283 | { |
3284 | std::swap (info->ops[0], info->ops[1]); | |
3285 | info->ops_swapped_p = true; | |
3286 | } | |
4d213bf6 | 3287 | if (check_no_overlap (m_store_info, i, false, |
bd909071 | 3288 | MIN (merged_store->first_order, info->order), |
a7fe6482 | 3289 | MAX (merged_store->last_order, info->order), |
bd909071 | 3290 | merged_store->start, |
a7fe6482 | 3291 | MAX (merged_store->start + merged_store->width, |
bd909071 JJ |
3292 | info->bitpos + info->bitsize), |
3293 | first_earlier, end_earlier)) | |
245f6de1 | 3294 | { |
7f5a3982 EB |
3295 | /* Turn MEM_REF into BIT_INSERT_EXPR for bit-field stores. */ |
3296 | if (info->rhs_code == MEM_REF && infof->rhs_code != MEM_REF) | |
3297 | { | |
3298 | info->rhs_code = BIT_INSERT_EXPR; | |
3299 | info->ops[0].val = gimple_assign_rhs1 (info->stmt); | |
3300 | info->ops[0].base_addr = NULL_TREE; | |
3301 | } | |
3302 | else if (infof->rhs_code == MEM_REF && info->rhs_code != MEM_REF) | |
3303 | { | |
3f207ab3 | 3304 | for (store_immediate_info *infoj : merged_store->stores) |
7f5a3982 EB |
3305 | { |
3306 | infoj->rhs_code = BIT_INSERT_EXPR; | |
3307 | infoj->ops[0].val = gimple_assign_rhs1 (infoj->stmt); | |
3308 | infoj->ops[0].base_addr = NULL_TREE; | |
3309 | } | |
e362a897 | 3310 | merged_store->bit_insertion = true; |
7f5a3982 EB |
3311 | } |
3312 | if ((infof->ops[0].base_addr | |
3313 | ? compatible_load_p (merged_store, info, base_addr, 0) | |
3314 | : !info->ops[0].base_addr) | |
3315 | && (infof->ops[1].base_addr | |
3316 | ? compatible_load_p (merged_store, info, base_addr, 1) | |
3317 | : !info->ops[1].base_addr)) | |
3318 | { | |
3319 | merged_store->merge_into (info); | |
3320 | goto done; | |
3321 | } | |
245f6de1 JJ |
3322 | } |
3323 | } | |
f663d9ad | 3324 | |
245f6de1 JJ |
3325 | /* |---store 1---| <gap> |---store 2---|. |
3326 | Gap between stores or the rhs not compatible. Start a new group. */ | |
f663d9ad | 3327 | |
245f6de1 JJ |
3328 | /* Try to apply all the stores recorded for the group to determine |
3329 | the bitpattern they write and discard it if that fails. | |
3330 | This will also reject single-store groups. */ | |
c94c3532 | 3331 | if (merged_store->apply_stores ()) |
245f6de1 | 3332 | m_merged_store_groups.safe_push (merged_store); |
c94c3532 EB |
3333 | else |
3334 | delete merged_store; | |
f663d9ad | 3335 | |
245f6de1 | 3336 | merged_store = new merged_store_group (info); |
bd909071 | 3337 | end_earlier = i; |
c94c3532 EB |
3338 | if (dump_file && (dump_flags & TDF_DETAILS)) |
3339 | fputs ("New store group\n", dump_file); | |
3340 | ||
3341 | done: | |
3342 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3343 | { | |
3344 | fprintf (dump_file, "Store %u:\nbitsize:" HOST_WIDE_INT_PRINT_DEC | |
3345 | " bitpos:" HOST_WIDE_INT_PRINT_DEC " val:", | |
3346 | i, info->bitsize, info->bitpos); | |
3347 | print_generic_expr (dump_file, gimple_assign_rhs1 (info->stmt)); | |
3348 | fputc ('\n', dump_file); | |
3349 | } | |
f663d9ad KT |
3350 | } |
3351 | ||
a62b3dc5 | 3352 | /* Record or discard the last store group. */ |
4b84d9b8 JJ |
3353 | if (merged_store) |
3354 | { | |
c94c3532 | 3355 | if (merged_store->apply_stores ()) |
4b84d9b8 | 3356 | m_merged_store_groups.safe_push (merged_store); |
c94c3532 EB |
3357 | else |
3358 | delete merged_store; | |
4b84d9b8 | 3359 | } |
f663d9ad KT |
3360 | |
3361 | gcc_assert (m_merged_store_groups.length () <= m_store_info.length ()); | |
c94c3532 | 3362 | |
f663d9ad KT |
3363 | bool success |
3364 | = !m_merged_store_groups.is_empty () | |
3365 | && m_merged_store_groups.length () < m_store_info.length (); | |
3366 | ||
3367 | if (success && dump_file) | |
c94c3532 | 3368 | fprintf (dump_file, "Coalescing successful!\nMerged into %u stores\n", |
a62b3dc5 | 3369 | m_merged_store_groups.length ()); |
f663d9ad KT |
3370 | |
3371 | return success; | |
3372 | } | |
3373 | ||
245f6de1 JJ |
3374 | /* Return the type to use for the merged stores or loads described by STMTS. |
3375 | This is needed to get the alias sets right. If IS_LOAD, look for rhs, | |
3376 | otherwise lhs. Additionally set *CLIQUEP and *BASEP to MR_DEPENDENCE_* | |
3377 | of the MEM_REFs if any. */ | |
f663d9ad KT |
3378 | |
3379 | static tree | |
245f6de1 JJ |
3380 | get_alias_type_for_stmts (vec<gimple *> &stmts, bool is_load, |
3381 | unsigned short *cliquep, unsigned short *basep) | |
f663d9ad KT |
3382 | { |
3383 | gimple *stmt; | |
3384 | unsigned int i; | |
245f6de1 JJ |
3385 | tree type = NULL_TREE; |
3386 | tree ret = NULL_TREE; | |
3387 | *cliquep = 0; | |
3388 | *basep = 0; | |
f663d9ad KT |
3389 | |
3390 | FOR_EACH_VEC_ELT (stmts, i, stmt) | |
3391 | { | |
245f6de1 JJ |
3392 | tree ref = is_load ? gimple_assign_rhs1 (stmt) |
3393 | : gimple_assign_lhs (stmt); | |
3394 | tree type1 = reference_alias_ptr_type (ref); | |
3395 | tree base = get_base_address (ref); | |
f663d9ad | 3396 | |
245f6de1 JJ |
3397 | if (i == 0) |
3398 | { | |
3399 | if (TREE_CODE (base) == MEM_REF) | |
3400 | { | |
3401 | *cliquep = MR_DEPENDENCE_CLIQUE (base); | |
3402 | *basep = MR_DEPENDENCE_BASE (base); | |
3403 | } | |
3404 | ret = type = type1; | |
3405 | continue; | |
3406 | } | |
f663d9ad | 3407 | if (!alias_ptr_types_compatible_p (type, type1)) |
245f6de1 JJ |
3408 | ret = ptr_type_node; |
3409 | if (TREE_CODE (base) != MEM_REF | |
3410 | || *cliquep != MR_DEPENDENCE_CLIQUE (base) | |
3411 | || *basep != MR_DEPENDENCE_BASE (base)) | |
3412 | { | |
3413 | *cliquep = 0; | |
3414 | *basep = 0; | |
3415 | } | |
f663d9ad | 3416 | } |
245f6de1 | 3417 | return ret; |
f663d9ad KT |
3418 | } |
3419 | ||
3420 | /* Return the location_t information we can find among the statements | |
3421 | in STMTS. */ | |
3422 | ||
3423 | static location_t | |
245f6de1 | 3424 | get_location_for_stmts (vec<gimple *> &stmts) |
f663d9ad | 3425 | { |
3f207ab3 | 3426 | for (gimple *stmt : stmts) |
f663d9ad KT |
3427 | if (gimple_has_location (stmt)) |
3428 | return gimple_location (stmt); | |
3429 | ||
3430 | return UNKNOWN_LOCATION; | |
3431 | } | |
3432 | ||
3433 | /* Used to decribe a store resulting from splitting a wide store in smaller | |
3434 | regularly-sized stores in split_group. */ | |
3435 | ||
6c1dae73 | 3436 | class split_store |
f663d9ad | 3437 | { |
6c1dae73 | 3438 | public: |
f663d9ad KT |
3439 | unsigned HOST_WIDE_INT bytepos; |
3440 | unsigned HOST_WIDE_INT size; | |
3441 | unsigned HOST_WIDE_INT align; | |
245f6de1 | 3442 | auto_vec<store_immediate_info *> orig_stores; |
a62b3dc5 JJ |
3443 | /* True if there is a single orig stmt covering the whole split store. */ |
3444 | bool orig; | |
f663d9ad KT |
3445 | split_store (unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, |
3446 | unsigned HOST_WIDE_INT); | |
3447 | }; | |
3448 | ||
3449 | /* Simple constructor. */ | |
3450 | ||
3451 | split_store::split_store (unsigned HOST_WIDE_INT bp, | |
3452 | unsigned HOST_WIDE_INT sz, | |
3453 | unsigned HOST_WIDE_INT al) | |
a62b3dc5 | 3454 | : bytepos (bp), size (sz), align (al), orig (false) |
f663d9ad | 3455 | { |
245f6de1 | 3456 | orig_stores.create (0); |
f663d9ad KT |
3457 | } |
3458 | ||
245f6de1 JJ |
3459 | /* Record all stores in GROUP that write to the region starting at BITPOS and |
3460 | is of size BITSIZE. Record infos for such statements in STORES if | |
3461 | non-NULL. The stores in GROUP must be sorted by bitposition. Return INFO | |
5384a802 JJ |
3462 | if there is exactly one original store in the range (in that case ignore |
3463 | clobber stmts, unless there are only clobber stmts). */ | |
f663d9ad | 3464 | |
a62b3dc5 | 3465 | static store_immediate_info * |
99b1c316 | 3466 | find_constituent_stores (class merged_store_group *group, |
245f6de1 JJ |
3467 | vec<store_immediate_info *> *stores, |
3468 | unsigned int *first, | |
3469 | unsigned HOST_WIDE_INT bitpos, | |
3470 | unsigned HOST_WIDE_INT bitsize) | |
f663d9ad | 3471 | { |
a62b3dc5 | 3472 | store_immediate_info *info, *ret = NULL; |
f663d9ad | 3473 | unsigned int i; |
a62b3dc5 JJ |
3474 | bool second = false; |
3475 | bool update_first = true; | |
f663d9ad | 3476 | unsigned HOST_WIDE_INT end = bitpos + bitsize; |
a62b3dc5 | 3477 | for (i = *first; group->stores.iterate (i, &info); ++i) |
f663d9ad KT |
3478 | { |
3479 | unsigned HOST_WIDE_INT stmt_start = info->bitpos; | |
3480 | unsigned HOST_WIDE_INT stmt_end = stmt_start + info->bitsize; | |
a62b3dc5 JJ |
3481 | if (stmt_end <= bitpos) |
3482 | { | |
3483 | /* BITPOS passed to this function never decreases from within the | |
3484 | same split_group call, so optimize and don't scan info records | |
3485 | which are known to end before or at BITPOS next time. | |
3486 | Only do it if all stores before this one also pass this. */ | |
3487 | if (update_first) | |
3488 | *first = i + 1; | |
3489 | continue; | |
3490 | } | |
3491 | else | |
3492 | update_first = false; | |
3493 | ||
f663d9ad | 3494 | /* The stores in GROUP are ordered by bitposition so if we're past |
a62b3dc5 JJ |
3495 | the region for this group return early. */ |
3496 | if (stmt_start >= end) | |
3497 | return ret; | |
3498 | ||
5384a802 JJ |
3499 | if (gimple_clobber_p (info->stmt)) |
3500 | { | |
3501 | if (stores) | |
3502 | stores->safe_push (info); | |
3503 | if (ret == NULL) | |
3504 | ret = info; | |
3505 | continue; | |
3506 | } | |
245f6de1 | 3507 | if (stores) |
a62b3dc5 | 3508 | { |
245f6de1 | 3509 | stores->safe_push (info); |
5384a802 | 3510 | if (ret && !gimple_clobber_p (ret->stmt)) |
a62b3dc5 JJ |
3511 | { |
3512 | ret = NULL; | |
3513 | second = true; | |
3514 | } | |
3515 | } | |
5384a802 | 3516 | else if (ret && !gimple_clobber_p (ret->stmt)) |
a62b3dc5 JJ |
3517 | return NULL; |
3518 | if (!second) | |
3519 | ret = info; | |
f663d9ad | 3520 | } |
a62b3dc5 | 3521 | return ret; |
f663d9ad KT |
3522 | } |
3523 | ||
d7a9512e JJ |
3524 | /* Return how many SSA_NAMEs used to compute value to store in the INFO |
3525 | store have multiple uses. If any SSA_NAME has multiple uses, also | |
3526 | count statements needed to compute it. */ | |
3527 | ||
3528 | static unsigned | |
3529 | count_multiple_uses (store_immediate_info *info) | |
3530 | { | |
3531 | gimple *stmt = info->stmt; | |
3532 | unsigned ret = 0; | |
3533 | switch (info->rhs_code) | |
3534 | { | |
3535 | case INTEGER_CST: | |
e362a897 | 3536 | case STRING_CST: |
d7a9512e JJ |
3537 | return 0; |
3538 | case BIT_AND_EXPR: | |
3539 | case BIT_IOR_EXPR: | |
3540 | case BIT_XOR_EXPR: | |
d60edaba JJ |
3541 | if (info->bit_not_p) |
3542 | { | |
3543 | if (!has_single_use (gimple_assign_rhs1 (stmt))) | |
3544 | ret = 1; /* Fall through below to return | |
3545 | the BIT_NOT_EXPR stmt and then | |
3546 | BIT_{AND,IOR,XOR}_EXPR and anything it | |
3547 | uses. */ | |
3548 | else | |
3549 | /* stmt is after this the BIT_NOT_EXPR. */ | |
3550 | stmt = SSA_NAME_DEF_STMT (gimple_assign_rhs1 (stmt)); | |
3551 | } | |
d7a9512e JJ |
3552 | if (!has_single_use (gimple_assign_rhs1 (stmt))) |
3553 | { | |
3554 | ret += 1 + info->ops[0].bit_not_p; | |
3555 | if (info->ops[1].base_addr) | |
3556 | ret += 1 + info->ops[1].bit_not_p; | |
3557 | return ret + 1; | |
3558 | } | |
3559 | stmt = SSA_NAME_DEF_STMT (gimple_assign_rhs1 (stmt)); | |
3560 | /* stmt is now the BIT_*_EXPR. */ | |
3561 | if (!has_single_use (gimple_assign_rhs1 (stmt))) | |
127ef369 JJ |
3562 | ret += 1 + info->ops[info->ops_swapped_p].bit_not_p; |
3563 | else if (info->ops[info->ops_swapped_p].bit_not_p) | |
d7a9512e JJ |
3564 | { |
3565 | gimple *stmt2 = SSA_NAME_DEF_STMT (gimple_assign_rhs1 (stmt)); | |
3566 | if (!has_single_use (gimple_assign_rhs1 (stmt2))) | |
3567 | ++ret; | |
3568 | } | |
3569 | if (info->ops[1].base_addr == NULL_TREE) | |
127ef369 JJ |
3570 | { |
3571 | gcc_checking_assert (!info->ops_swapped_p); | |
3572 | return ret; | |
3573 | } | |
d7a9512e | 3574 | if (!has_single_use (gimple_assign_rhs2 (stmt))) |
127ef369 JJ |
3575 | ret += 1 + info->ops[1 - info->ops_swapped_p].bit_not_p; |
3576 | else if (info->ops[1 - info->ops_swapped_p].bit_not_p) | |
d7a9512e JJ |
3577 | { |
3578 | gimple *stmt2 = SSA_NAME_DEF_STMT (gimple_assign_rhs2 (stmt)); | |
3579 | if (!has_single_use (gimple_assign_rhs1 (stmt2))) | |
3580 | ++ret; | |
3581 | } | |
3582 | return ret; | |
3583 | case MEM_REF: | |
3584 | if (!has_single_use (gimple_assign_rhs1 (stmt))) | |
3585 | return 1 + info->ops[0].bit_not_p; | |
3586 | else if (info->ops[0].bit_not_p) | |
3587 | { | |
3588 | stmt = SSA_NAME_DEF_STMT (gimple_assign_rhs1 (stmt)); | |
3589 | if (!has_single_use (gimple_assign_rhs1 (stmt))) | |
3590 | return 1; | |
3591 | } | |
3592 | return 0; | |
c94c3532 EB |
3593 | case BIT_INSERT_EXPR: |
3594 | return has_single_use (gimple_assign_rhs1 (stmt)) ? 0 : 1; | |
d7a9512e JJ |
3595 | default: |
3596 | gcc_unreachable (); | |
3597 | } | |
3598 | } | |
3599 | ||
f663d9ad | 3600 | /* Split a merged store described by GROUP by populating the SPLIT_STORES |
a62b3dc5 JJ |
3601 | vector (if non-NULL) with split_store structs describing the byte offset |
3602 | (from the base), the bit size and alignment of each store as well as the | |
3603 | original statements involved in each such split group. | |
f663d9ad KT |
3604 | This is to separate the splitting strategy from the statement |
3605 | building/emission/linking done in output_merged_store. | |
a62b3dc5 | 3606 | Return number of new stores. |
245f6de1 JJ |
3607 | If ALLOW_UNALIGNED_STORE is false, then all stores must be aligned. |
3608 | If ALLOW_UNALIGNED_LOAD is false, then all loads must be aligned. | |
3afd514b JJ |
3609 | BZERO_FIRST may be true only when the first store covers the whole group |
3610 | and clears it; if BZERO_FIRST is true, keep that first store in the set | |
3611 | unmodified and emit further stores for the overrides only. | |
a62b3dc5 JJ |
3612 | If SPLIT_STORES is NULL, it is just a dry run to count number of |
3613 | new stores. */ | |
f663d9ad | 3614 | |
a62b3dc5 | 3615 | static unsigned int |
245f6de1 | 3616 | split_group (merged_store_group *group, bool allow_unaligned_store, |
3afd514b | 3617 | bool allow_unaligned_load, bool bzero_first, |
99b1c316 | 3618 | vec<split_store *> *split_stores, |
d7a9512e JJ |
3619 | unsigned *total_orig, |
3620 | unsigned *total_new) | |
f663d9ad | 3621 | { |
a62b3dc5 JJ |
3622 | unsigned HOST_WIDE_INT pos = group->bitregion_start; |
3623 | unsigned HOST_WIDE_INT size = group->bitregion_end - pos; | |
f663d9ad | 3624 | unsigned HOST_WIDE_INT bytepos = pos / BITS_PER_UNIT; |
a62b3dc5 JJ |
3625 | unsigned HOST_WIDE_INT group_align = group->align; |
3626 | unsigned HOST_WIDE_INT align_base = group->align_base; | |
245f6de1 | 3627 | unsigned HOST_WIDE_INT group_load_align = group_align; |
d7a9512e | 3628 | bool any_orig = false; |
f663d9ad | 3629 | |
f663d9ad KT |
3630 | gcc_assert ((size % BITS_PER_UNIT == 0) && (pos % BITS_PER_UNIT == 0)); |
3631 | ||
e362a897 EB |
3632 | /* For bswap framework using sets of stores, all the checking has been done |
3633 | earlier in try_coalesce_bswap and the result always needs to be emitted | |
3634 | as a single store. Likewise for string concatenation, */ | |
4b84d9b8 | 3635 | if (group->stores[0]->rhs_code == LROTATE_EXPR |
e362a897 EB |
3636 | || group->stores[0]->rhs_code == NOP_EXPR |
3637 | || group->string_concatenation) | |
4b84d9b8 | 3638 | { |
3afd514b | 3639 | gcc_assert (!bzero_first); |
4b84d9b8 JJ |
3640 | if (total_orig) |
3641 | { | |
3642 | /* Avoid the old/new stmt count heuristics. It should be | |
3643 | always beneficial. */ | |
3644 | total_new[0] = 1; | |
3645 | total_orig[0] = 2; | |
3646 | } | |
3647 | ||
3648 | if (split_stores) | |
3649 | { | |
3650 | unsigned HOST_WIDE_INT align_bitpos | |
3651 | = (group->start - align_base) & (group_align - 1); | |
3652 | unsigned HOST_WIDE_INT align = group_align; | |
3653 | if (align_bitpos) | |
3654 | align = least_bit_hwi (align_bitpos); | |
3655 | bytepos = group->start / BITS_PER_UNIT; | |
99b1c316 | 3656 | split_store *store |
4b84d9b8 JJ |
3657 | = new split_store (bytepos, group->width, align); |
3658 | unsigned int first = 0; | |
3659 | find_constituent_stores (group, &store->orig_stores, | |
3660 | &first, group->start, group->width); | |
3661 | split_stores->safe_push (store); | |
3662 | } | |
3663 | ||
3664 | return 1; | |
3665 | } | |
3666 | ||
a62b3dc5 | 3667 | unsigned int ret = 0, first = 0; |
f663d9ad | 3668 | unsigned HOST_WIDE_INT try_pos = bytepos; |
f663d9ad | 3669 | |
d7a9512e JJ |
3670 | if (total_orig) |
3671 | { | |
3672 | unsigned int i; | |
3673 | store_immediate_info *info = group->stores[0]; | |
3674 | ||
3675 | total_new[0] = 0; | |
3676 | total_orig[0] = 1; /* The orig store. */ | |
3677 | info = group->stores[0]; | |
3678 | if (info->ops[0].base_addr) | |
a6fbd154 | 3679 | total_orig[0]++; |
d7a9512e | 3680 | if (info->ops[1].base_addr) |
a6fbd154 | 3681 | total_orig[0]++; |
d7a9512e JJ |
3682 | switch (info->rhs_code) |
3683 | { | |
3684 | case BIT_AND_EXPR: | |
3685 | case BIT_IOR_EXPR: | |
3686 | case BIT_XOR_EXPR: | |
3687 | total_orig[0]++; /* The orig BIT_*_EXPR stmt. */ | |
3688 | break; | |
3689 | default: | |
3690 | break; | |
3691 | } | |
3692 | total_orig[0] *= group->stores.length (); | |
3693 | ||
3694 | FOR_EACH_VEC_ELT (group->stores, i, info) | |
a6fbd154 JJ |
3695 | { |
3696 | total_new[0] += count_multiple_uses (info); | |
3697 | total_orig[0] += (info->bit_not_p | |
3698 | + info->ops[0].bit_not_p | |
3699 | + info->ops[1].bit_not_p); | |
3700 | } | |
d7a9512e JJ |
3701 | } |
3702 | ||
245f6de1 JJ |
3703 | if (!allow_unaligned_load) |
3704 | for (int i = 0; i < 2; ++i) | |
3705 | if (group->load_align[i]) | |
3706 | group_load_align = MIN (group_load_align, group->load_align[i]); | |
3707 | ||
3afd514b JJ |
3708 | if (bzero_first) |
3709 | { | |
5384a802 JJ |
3710 | store_immediate_info *gstore; |
3711 | FOR_EACH_VEC_ELT (group->stores, first, gstore) | |
3712 | if (!gimple_clobber_p (gstore->stmt)) | |
3713 | break; | |
3714 | ++first; | |
3afd514b JJ |
3715 | ret = 1; |
3716 | if (split_stores) | |
3717 | { | |
99b1c316 | 3718 | split_store *store |
5384a802 JJ |
3719 | = new split_store (bytepos, gstore->bitsize, align_base); |
3720 | store->orig_stores.safe_push (gstore); | |
3afd514b JJ |
3721 | store->orig = true; |
3722 | any_orig = true; | |
3723 | split_stores->safe_push (store); | |
3724 | } | |
3725 | } | |
3726 | ||
f663d9ad KT |
3727 | while (size > 0) |
3728 | { | |
245f6de1 | 3729 | if ((allow_unaligned_store || group_align <= BITS_PER_UNIT) |
3afd514b JJ |
3730 | && (group->mask[try_pos - bytepos] == (unsigned char) ~0U |
3731 | || (bzero_first && group->val[try_pos - bytepos] == 0))) | |
a62b3dc5 JJ |
3732 | { |
3733 | /* Skip padding bytes. */ | |
3734 | ++try_pos; | |
3735 | size -= BITS_PER_UNIT; | |
3736 | continue; | |
3737 | } | |
3738 | ||
f663d9ad | 3739 | unsigned HOST_WIDE_INT try_bitpos = try_pos * BITS_PER_UNIT; |
a62b3dc5 JJ |
3740 | unsigned int try_size = MAX_STORE_BITSIZE, nonmasked; |
3741 | unsigned HOST_WIDE_INT align_bitpos | |
3742 | = (try_bitpos - align_base) & (group_align - 1); | |
3743 | unsigned HOST_WIDE_INT align = group_align; | |
5384a802 | 3744 | bool found_orig = false; |
a62b3dc5 JJ |
3745 | if (align_bitpos) |
3746 | align = least_bit_hwi (align_bitpos); | |
245f6de1 | 3747 | if (!allow_unaligned_store) |
a62b3dc5 | 3748 | try_size = MIN (try_size, align); |
245f6de1 JJ |
3749 | if (!allow_unaligned_load) |
3750 | { | |
3751 | /* If we can't do or don't want to do unaligned stores | |
3752 | as well as loads, we need to take the loads into account | |
3753 | as well. */ | |
3754 | unsigned HOST_WIDE_INT load_align = group_load_align; | |
3755 | align_bitpos = (try_bitpos - align_base) & (load_align - 1); | |
3756 | if (align_bitpos) | |
3757 | load_align = least_bit_hwi (align_bitpos); | |
3758 | for (int i = 0; i < 2; ++i) | |
3759 | if (group->load_align[i]) | |
3760 | { | |
8a91d545 RS |
3761 | align_bitpos |
3762 | = known_alignment (try_bitpos | |
3763 | - group->stores[0]->bitpos | |
3764 | + group->stores[0]->ops[i].bitpos | |
3765 | - group->load_align_base[i]); | |
3766 | if (align_bitpos & (group_load_align - 1)) | |
245f6de1 JJ |
3767 | { |
3768 | unsigned HOST_WIDE_INT a = least_bit_hwi (align_bitpos); | |
3769 | load_align = MIN (load_align, a); | |
3770 | } | |
3771 | } | |
3772 | try_size = MIN (try_size, load_align); | |
3773 | } | |
a62b3dc5 | 3774 | store_immediate_info *info |
245f6de1 | 3775 | = find_constituent_stores (group, NULL, &first, try_bitpos, try_size); |
5384a802 | 3776 | if (info && !gimple_clobber_p (info->stmt)) |
a62b3dc5 JJ |
3777 | { |
3778 | /* If there is just one original statement for the range, see if | |
3779 | we can just reuse the original store which could be even larger | |
3780 | than try_size. */ | |
3781 | unsigned HOST_WIDE_INT stmt_end | |
3782 | = ROUND_UP (info->bitpos + info->bitsize, BITS_PER_UNIT); | |
245f6de1 JJ |
3783 | info = find_constituent_stores (group, NULL, &first, try_bitpos, |
3784 | stmt_end - try_bitpos); | |
a62b3dc5 JJ |
3785 | if (info && info->bitpos >= try_bitpos) |
3786 | { | |
5384a802 JJ |
3787 | store_immediate_info *info2 = NULL; |
3788 | unsigned int first_copy = first; | |
3789 | if (info->bitpos > try_bitpos | |
3790 | && stmt_end - try_bitpos <= try_size) | |
3791 | { | |
3792 | info2 = find_constituent_stores (group, NULL, &first_copy, | |
3793 | try_bitpos, | |
3794 | info->bitpos - try_bitpos); | |
3795 | gcc_assert (info2 == NULL || gimple_clobber_p (info2->stmt)); | |
3796 | } | |
3797 | if (info2 == NULL && stmt_end - try_bitpos < try_size) | |
3798 | { | |
3799 | info2 = find_constituent_stores (group, NULL, &first_copy, | |
3800 | stmt_end, | |
3801 | (try_bitpos + try_size) | |
3802 | - stmt_end); | |
3803 | gcc_assert (info2 == NULL || gimple_clobber_p (info2->stmt)); | |
3804 | } | |
3805 | if (info2 == NULL) | |
3806 | { | |
3807 | try_size = stmt_end - try_bitpos; | |
3808 | found_orig = true; | |
3809 | goto found; | |
3810 | } | |
a62b3dc5 JJ |
3811 | } |
3812 | } | |
f663d9ad | 3813 | |
a62b3dc5 JJ |
3814 | /* Approximate store bitsize for the case when there are no padding |
3815 | bits. */ | |
3816 | while (try_size > size) | |
3817 | try_size /= 2; | |
3818 | /* Now look for whole padding bytes at the end of that bitsize. */ | |
3819 | for (nonmasked = try_size / BITS_PER_UNIT; nonmasked > 0; --nonmasked) | |
3820 | if (group->mask[try_pos - bytepos + nonmasked - 1] | |
3afd514b JJ |
3821 | != (unsigned char) ~0U |
3822 | && (!bzero_first | |
3823 | || group->val[try_pos - bytepos + nonmasked - 1] != 0)) | |
a62b3dc5 | 3824 | break; |
5384a802 | 3825 | if (nonmasked == 0 || (info && gimple_clobber_p (info->stmt))) |
a62b3dc5 JJ |
3826 | { |
3827 | /* If entire try_size range is padding, skip it. */ | |
3828 | try_pos += try_size / BITS_PER_UNIT; | |
3829 | size -= try_size; | |
3830 | continue; | |
3831 | } | |
3832 | /* Otherwise try to decrease try_size if second half, last 3 quarters | |
3833 | etc. are padding. */ | |
3834 | nonmasked *= BITS_PER_UNIT; | |
3835 | while (nonmasked <= try_size / 2) | |
3836 | try_size /= 2; | |
245f6de1 | 3837 | if (!allow_unaligned_store && group_align > BITS_PER_UNIT) |
a62b3dc5 JJ |
3838 | { |
3839 | /* Now look for whole padding bytes at the start of that bitsize. */ | |
3840 | unsigned int try_bytesize = try_size / BITS_PER_UNIT, masked; | |
3841 | for (masked = 0; masked < try_bytesize; ++masked) | |
3afd514b JJ |
3842 | if (group->mask[try_pos - bytepos + masked] != (unsigned char) ~0U |
3843 | && (!bzero_first | |
3844 | || group->val[try_pos - bytepos + masked] != 0)) | |
a62b3dc5 JJ |
3845 | break; |
3846 | masked *= BITS_PER_UNIT; | |
3847 | gcc_assert (masked < try_size); | |
3848 | if (masked >= try_size / 2) | |
3849 | { | |
3850 | while (masked >= try_size / 2) | |
3851 | { | |
3852 | try_size /= 2; | |
3853 | try_pos += try_size / BITS_PER_UNIT; | |
3854 | size -= try_size; | |
3855 | masked -= try_size; | |
3856 | } | |
3857 | /* Need to recompute the alignment, so just retry at the new | |
3858 | position. */ | |
3859 | continue; | |
3860 | } | |
3861 | } | |
3862 | ||
3863 | found: | |
3864 | ++ret; | |
f663d9ad | 3865 | |
a62b3dc5 JJ |
3866 | if (split_stores) |
3867 | { | |
99b1c316 | 3868 | split_store *store |
a62b3dc5 | 3869 | = new split_store (try_pos, try_size, align); |
245f6de1 JJ |
3870 | info = find_constituent_stores (group, &store->orig_stores, |
3871 | &first, try_bitpos, try_size); | |
a62b3dc5 | 3872 | if (info |
5384a802 | 3873 | && !gimple_clobber_p (info->stmt) |
a62b3dc5 | 3874 | && info->bitpos >= try_bitpos |
5384a802 JJ |
3875 | && info->bitpos + info->bitsize <= try_bitpos + try_size |
3876 | && (store->orig_stores.length () == 1 | |
3877 | || found_orig | |
3878 | || (info->bitpos == try_bitpos | |
3879 | && (info->bitpos + info->bitsize | |
3880 | == try_bitpos + try_size)))) | |
d7a9512e JJ |
3881 | { |
3882 | store->orig = true; | |
3883 | any_orig = true; | |
3884 | } | |
a62b3dc5 JJ |
3885 | split_stores->safe_push (store); |
3886 | } | |
3887 | ||
3888 | try_pos += try_size / BITS_PER_UNIT; | |
f663d9ad | 3889 | size -= try_size; |
f663d9ad | 3890 | } |
a62b3dc5 | 3891 | |
d7a9512e JJ |
3892 | if (total_orig) |
3893 | { | |
a6fbd154 | 3894 | unsigned int i; |
99b1c316 | 3895 | split_store *store; |
d7a9512e JJ |
3896 | /* If we are reusing some original stores and any of the |
3897 | original SSA_NAMEs had multiple uses, we need to subtract | |
3898 | those now before we add the new ones. */ | |
3899 | if (total_new[0] && any_orig) | |
3900 | { | |
d7a9512e JJ |
3901 | FOR_EACH_VEC_ELT (*split_stores, i, store) |
3902 | if (store->orig) | |
3903 | total_new[0] -= count_multiple_uses (store->orig_stores[0]); | |
3904 | } | |
3905 | total_new[0] += ret; /* The new store. */ | |
3906 | store_immediate_info *info = group->stores[0]; | |
3907 | if (info->ops[0].base_addr) | |
a6fbd154 | 3908 | total_new[0] += ret; |
d7a9512e | 3909 | if (info->ops[1].base_addr) |
a6fbd154 | 3910 | total_new[0] += ret; |
d7a9512e JJ |
3911 | switch (info->rhs_code) |
3912 | { | |
3913 | case BIT_AND_EXPR: | |
3914 | case BIT_IOR_EXPR: | |
3915 | case BIT_XOR_EXPR: | |
3916 | total_new[0] += ret; /* The new BIT_*_EXPR stmt. */ | |
3917 | break; | |
3918 | default: | |
3919 | break; | |
3920 | } | |
a6fbd154 JJ |
3921 | FOR_EACH_VEC_ELT (*split_stores, i, store) |
3922 | { | |
3923 | unsigned int j; | |
3924 | bool bit_not_p[3] = { false, false, false }; | |
3925 | /* If all orig_stores have certain bit_not_p set, then | |
3926 | we'd use a BIT_NOT_EXPR stmt and need to account for it. | |
3927 | If some orig_stores have certain bit_not_p set, then | |
3928 | we'd use a BIT_XOR_EXPR with a mask and need to account for | |
3929 | it. */ | |
3930 | FOR_EACH_VEC_ELT (store->orig_stores, j, info) | |
3931 | { | |
3932 | if (info->ops[0].bit_not_p) | |
3933 | bit_not_p[0] = true; | |
3934 | if (info->ops[1].bit_not_p) | |
3935 | bit_not_p[1] = true; | |
3936 | if (info->bit_not_p) | |
3937 | bit_not_p[2] = true; | |
3938 | } | |
3939 | total_new[0] += bit_not_p[0] + bit_not_p[1] + bit_not_p[2]; | |
3940 | } | |
3941 | ||
d7a9512e JJ |
3942 | } |
3943 | ||
a62b3dc5 | 3944 | return ret; |
f663d9ad KT |
3945 | } |
3946 | ||
a6fbd154 JJ |
3947 | /* Return the operation through which the operand IDX (if < 2) or |
3948 | result (IDX == 2) should be inverted. If NOP_EXPR, no inversion | |
3949 | is done, if BIT_NOT_EXPR, all bits are inverted, if BIT_XOR_EXPR, | |
3950 | the bits should be xored with mask. */ | |
3951 | ||
3952 | static enum tree_code | |
3953 | invert_op (split_store *split_store, int idx, tree int_type, tree &mask) | |
3954 | { | |
3955 | unsigned int i; | |
3956 | store_immediate_info *info; | |
3957 | unsigned int cnt = 0; | |
e215422f | 3958 | bool any_paddings = false; |
a6fbd154 JJ |
3959 | FOR_EACH_VEC_ELT (split_store->orig_stores, i, info) |
3960 | { | |
3961 | bool bit_not_p = idx < 2 ? info->ops[idx].bit_not_p : info->bit_not_p; | |
3962 | if (bit_not_p) | |
e215422f JJ |
3963 | { |
3964 | ++cnt; | |
3965 | tree lhs = gimple_assign_lhs (info->stmt); | |
3966 | if (INTEGRAL_TYPE_P (TREE_TYPE (lhs)) | |
3967 | && TYPE_PRECISION (TREE_TYPE (lhs)) < info->bitsize) | |
3968 | any_paddings = true; | |
3969 | } | |
a6fbd154 JJ |
3970 | } |
3971 | mask = NULL_TREE; | |
3972 | if (cnt == 0) | |
3973 | return NOP_EXPR; | |
e215422f | 3974 | if (cnt == split_store->orig_stores.length () && !any_paddings) |
a6fbd154 JJ |
3975 | return BIT_NOT_EXPR; |
3976 | ||
3977 | unsigned HOST_WIDE_INT try_bitpos = split_store->bytepos * BITS_PER_UNIT; | |
3978 | unsigned buf_size = split_store->size / BITS_PER_UNIT; | |
3979 | unsigned char *buf | |
3980 | = XALLOCAVEC (unsigned char, buf_size); | |
3981 | memset (buf, ~0U, buf_size); | |
3982 | FOR_EACH_VEC_ELT (split_store->orig_stores, i, info) | |
3983 | { | |
3984 | bool bit_not_p = idx < 2 ? info->ops[idx].bit_not_p : info->bit_not_p; | |
3985 | if (!bit_not_p) | |
3986 | continue; | |
3987 | /* Clear regions with bit_not_p and invert afterwards, rather than | |
3988 | clear regions with !bit_not_p, so that gaps in between stores aren't | |
3989 | set in the mask. */ | |
3990 | unsigned HOST_WIDE_INT bitsize = info->bitsize; | |
e215422f | 3991 | unsigned HOST_WIDE_INT prec = bitsize; |
a6fbd154 | 3992 | unsigned int pos_in_buffer = 0; |
e215422f JJ |
3993 | if (any_paddings) |
3994 | { | |
3995 | tree lhs = gimple_assign_lhs (info->stmt); | |
3996 | if (INTEGRAL_TYPE_P (TREE_TYPE (lhs)) | |
3997 | && TYPE_PRECISION (TREE_TYPE (lhs)) < bitsize) | |
3998 | prec = TYPE_PRECISION (TREE_TYPE (lhs)); | |
3999 | } | |
a6fbd154 JJ |
4000 | if (info->bitpos < try_bitpos) |
4001 | { | |
4002 | gcc_assert (info->bitpos + bitsize > try_bitpos); | |
e215422f JJ |
4003 | if (!BYTES_BIG_ENDIAN) |
4004 | { | |
4005 | if (prec <= try_bitpos - info->bitpos) | |
4006 | continue; | |
4007 | prec -= try_bitpos - info->bitpos; | |
4008 | } | |
4009 | bitsize -= try_bitpos - info->bitpos; | |
4010 | if (BYTES_BIG_ENDIAN && prec > bitsize) | |
4011 | prec = bitsize; | |
a6fbd154 JJ |
4012 | } |
4013 | else | |
4014 | pos_in_buffer = info->bitpos - try_bitpos; | |
e215422f JJ |
4015 | if (prec < bitsize) |
4016 | { | |
4017 | /* If this is a bool inversion, invert just the least significant | |
4018 | prec bits rather than all bits of it. */ | |
4019 | if (BYTES_BIG_ENDIAN) | |
4020 | { | |
4021 | pos_in_buffer += bitsize - prec; | |
4022 | if (pos_in_buffer >= split_store->size) | |
4023 | continue; | |
4024 | } | |
4025 | bitsize = prec; | |
4026 | } | |
a6fbd154 JJ |
4027 | if (pos_in_buffer + bitsize > split_store->size) |
4028 | bitsize = split_store->size - pos_in_buffer; | |
4029 | unsigned char *p = buf + (pos_in_buffer / BITS_PER_UNIT); | |
4030 | if (BYTES_BIG_ENDIAN) | |
4031 | clear_bit_region_be (p, (BITS_PER_UNIT - 1 | |
4032 | - (pos_in_buffer % BITS_PER_UNIT)), bitsize); | |
4033 | else | |
4034 | clear_bit_region (p, pos_in_buffer % BITS_PER_UNIT, bitsize); | |
4035 | } | |
4036 | for (unsigned int i = 0; i < buf_size; ++i) | |
4037 | buf[i] = ~buf[i]; | |
4038 | mask = native_interpret_expr (int_type, buf, buf_size); | |
4039 | return BIT_XOR_EXPR; | |
4040 | } | |
4041 | ||
f663d9ad KT |
4042 | /* Given a merged store group GROUP output the widened version of it. |
4043 | The store chain is against the base object BASE. | |
4044 | Try store sizes of at most MAX_STORE_BITSIZE bits wide and don't output | |
4045 | unaligned stores for STRICT_ALIGNMENT targets or if it's too expensive. | |
4046 | Make sure that the number of statements output is less than the number of | |
4047 | original statements. If a better sequence is possible emit it and | |
4048 | return true. */ | |
4049 | ||
4050 | bool | |
b5926e23 | 4051 | imm_store_chain_info::output_merged_store (merged_store_group *group) |
f663d9ad | 4052 | { |
e362a897 | 4053 | const unsigned HOST_WIDE_INT start_byte_pos |
a62b3dc5 | 4054 | = group->bitregion_start / BITS_PER_UNIT; |
f663d9ad KT |
4055 | unsigned int orig_num_stmts = group->stores.length (); |
4056 | if (orig_num_stmts < 2) | |
4057 | return false; | |
4058 | ||
245f6de1 | 4059 | bool allow_unaligned_store |
028d4092 | 4060 | = !STRICT_ALIGNMENT && param_store_merging_allow_unaligned; |
245f6de1 | 4061 | bool allow_unaligned_load = allow_unaligned_store; |
3afd514b | 4062 | bool bzero_first = false; |
5384a802 JJ |
4063 | store_immediate_info *store; |
4064 | unsigned int num_clobber_stmts = 0; | |
4065 | if (group->stores[0]->rhs_code == INTEGER_CST) | |
4066 | { | |
e362a897 | 4067 | unsigned int i; |
5384a802 JJ |
4068 | FOR_EACH_VEC_ELT (group->stores, i, store) |
4069 | if (gimple_clobber_p (store->stmt)) | |
4070 | num_clobber_stmts++; | |
4071 | else if (TREE_CODE (gimple_assign_rhs1 (store->stmt)) == CONSTRUCTOR | |
4072 | && CONSTRUCTOR_NELTS (gimple_assign_rhs1 (store->stmt)) == 0 | |
4073 | && group->start == store->bitpos | |
4074 | && group->width == store->bitsize | |
4075 | && (group->start % BITS_PER_UNIT) == 0 | |
4076 | && (group->width % BITS_PER_UNIT) == 0) | |
4077 | { | |
4078 | bzero_first = true; | |
4079 | break; | |
4080 | } | |
4081 | else | |
4082 | break; | |
4083 | FOR_EACH_VEC_ELT_FROM (group->stores, i, store, i) | |
4084 | if (gimple_clobber_p (store->stmt)) | |
4085 | num_clobber_stmts++; | |
4086 | if (num_clobber_stmts == orig_num_stmts) | |
4087 | return false; | |
4088 | orig_num_stmts -= num_clobber_stmts; | |
4089 | } | |
3afd514b | 4090 | if (allow_unaligned_store || bzero_first) |
a62b3dc5 JJ |
4091 | { |
4092 | /* If unaligned stores are allowed, see how many stores we'd emit | |
4093 | for unaligned and how many stores we'd emit for aligned stores. | |
3afd514b JJ |
4094 | Only use unaligned stores if it allows fewer stores than aligned. |
4095 | Similarly, if there is a whole region clear first, prefer expanding | |
4096 | it together compared to expanding clear first followed by merged | |
4097 | further stores. */ | |
21f65995 | 4098 | unsigned cnt[4] = { ~0U, ~0U, ~0U, ~0U }; |
3afd514b JJ |
4099 | int pass_min = 0; |
4100 | for (int pass = 0; pass < 4; ++pass) | |
4101 | { | |
4102 | if (!allow_unaligned_store && (pass & 1) != 0) | |
4103 | continue; | |
4104 | if (!bzero_first && (pass & 2) != 0) | |
4105 | continue; | |
4106 | cnt[pass] = split_group (group, (pass & 1) != 0, | |
4107 | allow_unaligned_load, (pass & 2) != 0, | |
4108 | NULL, NULL, NULL); | |
4109 | if (cnt[pass] < cnt[pass_min]) | |
4110 | pass_min = pass; | |
4111 | } | |
4112 | if ((pass_min & 1) == 0) | |
245f6de1 | 4113 | allow_unaligned_store = false; |
3afd514b JJ |
4114 | if ((pass_min & 2) == 0) |
4115 | bzero_first = false; | |
a62b3dc5 | 4116 | } |
e362a897 EB |
4117 | |
4118 | auto_vec<class split_store *, 32> split_stores; | |
4119 | split_store *split_store; | |
4120 | unsigned total_orig, total_new, i; | |
3afd514b | 4121 | split_group (group, allow_unaligned_store, allow_unaligned_load, bzero_first, |
d7a9512e | 4122 | &split_stores, &total_orig, &total_new); |
a62b3dc5 | 4123 | |
5384a802 JJ |
4124 | /* Determine if there is a clobber covering the whole group at the start, |
4125 | followed by proposed split stores that cover the whole group. In that | |
4126 | case, prefer the transformation even if | |
4127 | split_stores.length () == orig_num_stmts. */ | |
4128 | bool clobber_first = false; | |
4129 | if (num_clobber_stmts | |
4130 | && gimple_clobber_p (group->stores[0]->stmt) | |
4131 | && group->start == group->stores[0]->bitpos | |
4132 | && group->width == group->stores[0]->bitsize | |
4133 | && (group->start % BITS_PER_UNIT) == 0 | |
4134 | && (group->width % BITS_PER_UNIT) == 0) | |
4135 | { | |
4136 | clobber_first = true; | |
4137 | unsigned HOST_WIDE_INT pos = group->start / BITS_PER_UNIT; | |
4138 | FOR_EACH_VEC_ELT (split_stores, i, split_store) | |
4139 | if (split_store->bytepos != pos) | |
4140 | { | |
4141 | clobber_first = false; | |
4142 | break; | |
4143 | } | |
4144 | else | |
4145 | pos += split_store->size / BITS_PER_UNIT; | |
4146 | if (pos != (group->start + group->width) / BITS_PER_UNIT) | |
4147 | clobber_first = false; | |
4148 | } | |
4149 | ||
4150 | if (split_stores.length () >= orig_num_stmts + clobber_first) | |
a62b3dc5 | 4151 | { |
5384a802 | 4152 | |
a62b3dc5 JJ |
4153 | /* We didn't manage to reduce the number of statements. Bail out. */ |
4154 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
d7a9512e JJ |
4155 | fprintf (dump_file, "Exceeded original number of stmts (%u)." |
4156 | " Not profitable to emit new sequence.\n", | |
4157 | orig_num_stmts); | |
dd172744 RB |
4158 | FOR_EACH_VEC_ELT (split_stores, i, split_store) |
4159 | delete split_store; | |
a62b3dc5 JJ |
4160 | return false; |
4161 | } | |
d7a9512e JJ |
4162 | if (total_orig <= total_new) |
4163 | { | |
4164 | /* If number of estimated new statements is above estimated original | |
4165 | statements, bail out too. */ | |
4166 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
4167 | fprintf (dump_file, "Estimated number of original stmts (%u)" | |
4168 | " not larger than estimated number of new" | |
4169 | " stmts (%u).\n", | |
4170 | total_orig, total_new); | |
dd172744 RB |
4171 | FOR_EACH_VEC_ELT (split_stores, i, split_store) |
4172 | delete split_store; | |
4b84d9b8 | 4173 | return false; |
d7a9512e | 4174 | } |
5384a802 JJ |
4175 | if (group->stores[0]->rhs_code == INTEGER_CST) |
4176 | { | |
4177 | bool all_orig = true; | |
4178 | FOR_EACH_VEC_ELT (split_stores, i, split_store) | |
4179 | if (!split_store->orig) | |
4180 | { | |
4181 | all_orig = false; | |
4182 | break; | |
4183 | } | |
4184 | if (all_orig) | |
4185 | { | |
4186 | unsigned int cnt = split_stores.length (); | |
4187 | store_immediate_info *store; | |
4188 | FOR_EACH_VEC_ELT (group->stores, i, store) | |
4189 | if (gimple_clobber_p (store->stmt)) | |
4190 | ++cnt; | |
4191 | /* Punt if we wouldn't make any real changes, i.e. keep all | |
4192 | orig stmts + all clobbers. */ | |
4193 | if (cnt == group->stores.length ()) | |
4194 | { | |
4195 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
4196 | fprintf (dump_file, "Exceeded original number of stmts (%u)." | |
4197 | " Not profitable to emit new sequence.\n", | |
4198 | orig_num_stmts); | |
4199 | FOR_EACH_VEC_ELT (split_stores, i, split_store) | |
4200 | delete split_store; | |
4201 | return false; | |
4202 | } | |
4203 | } | |
4204 | } | |
f663d9ad KT |
4205 | |
4206 | gimple_stmt_iterator last_gsi = gsi_for_stmt (group->last_stmt); | |
4207 | gimple_seq seq = NULL; | |
f663d9ad KT |
4208 | tree last_vdef, new_vuse; |
4209 | last_vdef = gimple_vdef (group->last_stmt); | |
4210 | new_vuse = gimple_vuse (group->last_stmt); | |
4b84d9b8 JJ |
4211 | tree bswap_res = NULL_TREE; |
4212 | ||
5384a802 JJ |
4213 | /* Clobbers are not removed. */ |
4214 | if (gimple_clobber_p (group->last_stmt)) | |
4215 | { | |
4216 | new_vuse = make_ssa_name (gimple_vop (cfun), group->last_stmt); | |
4217 | gimple_set_vdef (group->last_stmt, new_vuse); | |
4218 | } | |
4219 | ||
4b84d9b8 JJ |
4220 | if (group->stores[0]->rhs_code == LROTATE_EXPR |
4221 | || group->stores[0]->rhs_code == NOP_EXPR) | |
4222 | { | |
4223 | tree fndecl = NULL_TREE, bswap_type = NULL_TREE, load_type; | |
4224 | gimple *ins_stmt = group->stores[0]->ins_stmt; | |
4225 | struct symbolic_number *n = &group->stores[0]->n; | |
4226 | bool bswap = group->stores[0]->rhs_code == LROTATE_EXPR; | |
4227 | ||
4228 | switch (n->range) | |
4229 | { | |
4230 | case 16: | |
4231 | load_type = bswap_type = uint16_type_node; | |
4232 | break; | |
4233 | case 32: | |
4234 | load_type = uint32_type_node; | |
4235 | if (bswap) | |
4236 | { | |
4237 | fndecl = builtin_decl_explicit (BUILT_IN_BSWAP32); | |
4238 | bswap_type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (fndecl))); | |
4239 | } | |
4240 | break; | |
4241 | case 64: | |
4242 | load_type = uint64_type_node; | |
4243 | if (bswap) | |
4244 | { | |
4245 | fndecl = builtin_decl_explicit (BUILT_IN_BSWAP64); | |
4246 | bswap_type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (fndecl))); | |
4247 | } | |
4248 | break; | |
4249 | default: | |
4250 | gcc_unreachable (); | |
4251 | } | |
4252 | ||
4253 | /* If the loads have each vuse of the corresponding store, | |
4254 | we've checked the aliasing already in try_coalesce_bswap and | |
4255 | we want to sink the need load into seq. So need to use new_vuse | |
4256 | on the load. */ | |
30fa8e9c | 4257 | if (n->base_addr) |
4b84d9b8 | 4258 | { |
30fa8e9c JJ |
4259 | if (n->vuse == NULL) |
4260 | { | |
4261 | n->vuse = new_vuse; | |
4262 | ins_stmt = NULL; | |
4263 | } | |
4264 | else | |
4265 | /* Update vuse in case it has changed by output_merged_stores. */ | |
4266 | n->vuse = gimple_vuse (ins_stmt); | |
4b84d9b8 JJ |
4267 | } |
4268 | bswap_res = bswap_replace (gsi_start (seq), ins_stmt, fndecl, | |
b320edc0 JJ |
4269 | bswap_type, load_type, n, bswap, |
4270 | ~(uint64_t) 0); | |
4b84d9b8 JJ |
4271 | gcc_assert (bswap_res); |
4272 | } | |
f663d9ad KT |
4273 | |
4274 | gimple *stmt = NULL; | |
245f6de1 | 4275 | auto_vec<gimple *, 32> orig_stmts; |
4b84d9b8 JJ |
4276 | gimple_seq this_seq; |
4277 | tree addr = force_gimple_operand_1 (unshare_expr (base_addr), &this_seq, | |
aa55dc0c | 4278 | is_gimple_mem_ref_addr, NULL_TREE); |
4b84d9b8 | 4279 | gimple_seq_add_seq_without_update (&seq, this_seq); |
245f6de1 JJ |
4280 | |
4281 | tree load_addr[2] = { NULL_TREE, NULL_TREE }; | |
4282 | gimple_seq load_seq[2] = { NULL, NULL }; | |
4283 | gimple_stmt_iterator load_gsi[2] = { gsi_none (), gsi_none () }; | |
4284 | for (int j = 0; j < 2; ++j) | |
4285 | { | |
4286 | store_operand_info &op = group->stores[0]->ops[j]; | |
4287 | if (op.base_addr == NULL_TREE) | |
4288 | continue; | |
4289 | ||
4290 | store_immediate_info *infol = group->stores.last (); | |
4291 | if (gimple_vuse (op.stmt) == gimple_vuse (infol->ops[j].stmt)) | |
4292 | { | |
97031af7 JJ |
4293 | /* We can't pick the location randomly; while we've verified |
4294 | all the loads have the same vuse, they can be still in different | |
4295 | basic blocks and we need to pick the one from the last bb: | |
4296 | int x = q[0]; | |
4297 | if (x == N) return; | |
4298 | int y = q[1]; | |
4299 | p[0] = x; | |
4300 | p[1] = y; | |
4301 | otherwise if we put the wider load at the q[0] load, we might | |
4302 | segfault if q[1] is not mapped. */ | |
4303 | basic_block bb = gimple_bb (op.stmt); | |
4304 | gimple *ostmt = op.stmt; | |
4305 | store_immediate_info *info; | |
4306 | FOR_EACH_VEC_ELT (group->stores, i, info) | |
4307 | { | |
4308 | gimple *tstmt = info->ops[j].stmt; | |
4309 | basic_block tbb = gimple_bb (tstmt); | |
4310 | if (dominated_by_p (CDI_DOMINATORS, tbb, bb)) | |
4311 | { | |
4312 | ostmt = tstmt; | |
4313 | bb = tbb; | |
4314 | } | |
4315 | } | |
4316 | load_gsi[j] = gsi_for_stmt (ostmt); | |
245f6de1 JJ |
4317 | load_addr[j] |
4318 | = force_gimple_operand_1 (unshare_expr (op.base_addr), | |
4319 | &load_seq[j], is_gimple_mem_ref_addr, | |
4320 | NULL_TREE); | |
4321 | } | |
4322 | else if (operand_equal_p (base_addr, op.base_addr, 0)) | |
4323 | load_addr[j] = addr; | |
4324 | else | |
3e2927a1 | 4325 | { |
3e2927a1 JJ |
4326 | load_addr[j] |
4327 | = force_gimple_operand_1 (unshare_expr (op.base_addr), | |
4328 | &this_seq, is_gimple_mem_ref_addr, | |
4329 | NULL_TREE); | |
4330 | gimple_seq_add_seq_without_update (&seq, this_seq); | |
4331 | } | |
245f6de1 JJ |
4332 | } |
4333 | ||
f663d9ad KT |
4334 | FOR_EACH_VEC_ELT (split_stores, i, split_store) |
4335 | { | |
e362a897 EB |
4336 | const unsigned HOST_WIDE_INT try_size = split_store->size; |
4337 | const unsigned HOST_WIDE_INT try_pos = split_store->bytepos; | |
4338 | const unsigned HOST_WIDE_INT try_bitpos = try_pos * BITS_PER_UNIT; | |
4339 | const unsigned HOST_WIDE_INT try_align = split_store->align; | |
4340 | const unsigned HOST_WIDE_INT try_offset = try_pos - start_byte_pos; | |
a62b3dc5 JJ |
4341 | tree dest, src; |
4342 | location_t loc; | |
e362a897 | 4343 | |
a62b3dc5 JJ |
4344 | if (split_store->orig) |
4345 | { | |
5384a802 JJ |
4346 | /* If there is just a single non-clobber constituent store |
4347 | which covers the whole area, just reuse the lhs and rhs. */ | |
4348 | gimple *orig_stmt = NULL; | |
4349 | store_immediate_info *store; | |
4350 | unsigned int j; | |
4351 | FOR_EACH_VEC_ELT (split_store->orig_stores, j, store) | |
4352 | if (!gimple_clobber_p (store->stmt)) | |
4353 | { | |
4354 | orig_stmt = store->stmt; | |
4355 | break; | |
4356 | } | |
245f6de1 JJ |
4357 | dest = gimple_assign_lhs (orig_stmt); |
4358 | src = gimple_assign_rhs1 (orig_stmt); | |
4359 | loc = gimple_location (orig_stmt); | |
a62b3dc5 JJ |
4360 | } |
4361 | else | |
4362 | { | |
245f6de1 JJ |
4363 | store_immediate_info *info; |
4364 | unsigned short clique, base; | |
4365 | unsigned int k; | |
4366 | FOR_EACH_VEC_ELT (split_store->orig_stores, k, info) | |
4367 | orig_stmts.safe_push (info->stmt); | |
a62b3dc5 | 4368 | tree offset_type |
245f6de1 | 4369 | = get_alias_type_for_stmts (orig_stmts, false, &clique, &base); |
e362a897 | 4370 | tree dest_type; |
245f6de1 JJ |
4371 | loc = get_location_for_stmts (orig_stmts); |
4372 | orig_stmts.truncate (0); | |
a62b3dc5 | 4373 | |
e362a897 EB |
4374 | if (group->string_concatenation) |
4375 | dest_type | |
4376 | = build_array_type_nelts (char_type_node, | |
4377 | try_size / BITS_PER_UNIT); | |
4378 | else | |
4379 | { | |
4380 | dest_type = build_nonstandard_integer_type (try_size, UNSIGNED); | |
4381 | dest_type = build_aligned_type (dest_type, try_align); | |
4382 | } | |
4383 | dest = fold_build2 (MEM_REF, dest_type, addr, | |
a62b3dc5 | 4384 | build_int_cst (offset_type, try_pos)); |
245f6de1 JJ |
4385 | if (TREE_CODE (dest) == MEM_REF) |
4386 | { | |
4387 | MR_DEPENDENCE_CLIQUE (dest) = clique; | |
4388 | MR_DEPENDENCE_BASE (dest) = base; | |
4389 | } | |
4390 | ||
c94c3532 | 4391 | tree mask; |
e362a897 | 4392 | if (bswap_res || group->string_concatenation) |
c94c3532 EB |
4393 | mask = integer_zero_node; |
4394 | else | |
e362a897 EB |
4395 | mask = native_interpret_expr (dest_type, |
4396 | group->mask + try_offset, | |
4b84d9b8 | 4397 | group->buf_size); |
245f6de1 JJ |
4398 | |
4399 | tree ops[2]; | |
4400 | for (int j = 0; | |
4401 | j < 1 + (split_store->orig_stores[0]->ops[1].val != NULL_TREE); | |
4402 | ++j) | |
4403 | { | |
4404 | store_operand_info &op = split_store->orig_stores[0]->ops[j]; | |
4b84d9b8 JJ |
4405 | if (bswap_res) |
4406 | ops[j] = bswap_res; | |
e362a897 EB |
4407 | else if (group->string_concatenation) |
4408 | { | |
4409 | ops[j] = build_string (try_size / BITS_PER_UNIT, | |
4410 | (const char *) group->val + try_offset); | |
4411 | TREE_TYPE (ops[j]) = dest_type; | |
4412 | } | |
4b84d9b8 | 4413 | else if (op.base_addr) |
245f6de1 JJ |
4414 | { |
4415 | FOR_EACH_VEC_ELT (split_store->orig_stores, k, info) | |
4416 | orig_stmts.safe_push (info->ops[j].stmt); | |
4417 | ||
4418 | offset_type = get_alias_type_for_stmts (orig_stmts, true, | |
4419 | &clique, &base); | |
4420 | location_t load_loc = get_location_for_stmts (orig_stmts); | |
4421 | orig_stmts.truncate (0); | |
4422 | ||
4423 | unsigned HOST_WIDE_INT load_align = group->load_align[j]; | |
4424 | unsigned HOST_WIDE_INT align_bitpos | |
c94c3532 | 4425 | = known_alignment (try_bitpos |
8a91d545 RS |
4426 | - split_store->orig_stores[0]->bitpos |
4427 | + op.bitpos); | |
4428 | if (align_bitpos & (load_align - 1)) | |
245f6de1 JJ |
4429 | load_align = least_bit_hwi (align_bitpos); |
4430 | ||
4431 | tree load_int_type | |
4432 | = build_nonstandard_integer_type (try_size, UNSIGNED); | |
4433 | load_int_type | |
4434 | = build_aligned_type (load_int_type, load_align); | |
4435 | ||
8a91d545 | 4436 | poly_uint64 load_pos |
c94c3532 | 4437 | = exact_div (try_bitpos |
8a91d545 RS |
4438 | - split_store->orig_stores[0]->bitpos |
4439 | + op.bitpos, | |
4440 | BITS_PER_UNIT); | |
245f6de1 JJ |
4441 | ops[j] = fold_build2 (MEM_REF, load_int_type, load_addr[j], |
4442 | build_int_cst (offset_type, load_pos)); | |
4443 | if (TREE_CODE (ops[j]) == MEM_REF) | |
4444 | { | |
4445 | MR_DEPENDENCE_CLIQUE (ops[j]) = clique; | |
4446 | MR_DEPENDENCE_BASE (ops[j]) = base; | |
4447 | } | |
4448 | if (!integer_zerop (mask)) | |
e9e2bad7 MS |
4449 | { |
4450 | /* The load might load some bits (that will be masked | |
4451 | off later on) uninitialized, avoid -W*uninitialized | |
4452 | warnings in that case. */ | |
4453 | suppress_warning (ops[j], OPT_Wuninitialized); | |
4454 | } | |
245f6de1 | 4455 | |
e362a897 | 4456 | stmt = gimple_build_assign (make_ssa_name (dest_type), ops[j]); |
245f6de1 JJ |
4457 | gimple_set_location (stmt, load_loc); |
4458 | if (gsi_bb (load_gsi[j])) | |
4459 | { | |
4460 | gimple_set_vuse (stmt, gimple_vuse (op.stmt)); | |
4461 | gimple_seq_add_stmt_without_update (&load_seq[j], stmt); | |
4462 | } | |
4463 | else | |
4464 | { | |
4465 | gimple_set_vuse (stmt, new_vuse); | |
4466 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4467 | } | |
4468 | ops[j] = gimple_assign_lhs (stmt); | |
a6fbd154 JJ |
4469 | tree xor_mask; |
4470 | enum tree_code inv_op | |
e362a897 | 4471 | = invert_op (split_store, j, dest_type, xor_mask); |
a6fbd154 | 4472 | if (inv_op != NOP_EXPR) |
383ac8dc | 4473 | { |
e362a897 | 4474 | stmt = gimple_build_assign (make_ssa_name (dest_type), |
a6fbd154 | 4475 | inv_op, ops[j], xor_mask); |
383ac8dc JJ |
4476 | gimple_set_location (stmt, load_loc); |
4477 | ops[j] = gimple_assign_lhs (stmt); | |
4478 | ||
4479 | if (gsi_bb (load_gsi[j])) | |
4480 | gimple_seq_add_stmt_without_update (&load_seq[j], | |
4481 | stmt); | |
4482 | else | |
4483 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4484 | } | |
245f6de1 JJ |
4485 | } |
4486 | else | |
e362a897 EB |
4487 | ops[j] = native_interpret_expr (dest_type, |
4488 | group->val + try_offset, | |
245f6de1 JJ |
4489 | group->buf_size); |
4490 | } | |
4491 | ||
4492 | switch (split_store->orig_stores[0]->rhs_code) | |
4493 | { | |
4494 | case BIT_AND_EXPR: | |
4495 | case BIT_IOR_EXPR: | |
4496 | case BIT_XOR_EXPR: | |
4497 | FOR_EACH_VEC_ELT (split_store->orig_stores, k, info) | |
4498 | { | |
4499 | tree rhs1 = gimple_assign_rhs1 (info->stmt); | |
4500 | orig_stmts.safe_push (SSA_NAME_DEF_STMT (rhs1)); | |
4501 | } | |
4502 | location_t bit_loc; | |
4503 | bit_loc = get_location_for_stmts (orig_stmts); | |
4504 | orig_stmts.truncate (0); | |
4505 | ||
4506 | stmt | |
e362a897 | 4507 | = gimple_build_assign (make_ssa_name (dest_type), |
245f6de1 JJ |
4508 | split_store->orig_stores[0]->rhs_code, |
4509 | ops[0], ops[1]); | |
4510 | gimple_set_location (stmt, bit_loc); | |
4511 | /* If there is just one load and there is a separate | |
4512 | load_seq[0], emit the bitwise op right after it. */ | |
4513 | if (load_addr[1] == NULL_TREE && gsi_bb (load_gsi[0])) | |
4514 | gimple_seq_add_stmt_without_update (&load_seq[0], stmt); | |
4515 | /* Otherwise, if at least one load is in seq, we need to | |
4516 | emit the bitwise op right before the store. If there | |
4517 | are two loads and are emitted somewhere else, it would | |
4518 | be better to emit the bitwise op as early as possible; | |
4519 | we don't track where that would be possible right now | |
4520 | though. */ | |
4521 | else | |
4522 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4523 | src = gimple_assign_lhs (stmt); | |
a6fbd154 JJ |
4524 | tree xor_mask; |
4525 | enum tree_code inv_op; | |
e362a897 | 4526 | inv_op = invert_op (split_store, 2, dest_type, xor_mask); |
a6fbd154 | 4527 | if (inv_op != NOP_EXPR) |
d60edaba | 4528 | { |
e362a897 | 4529 | stmt = gimple_build_assign (make_ssa_name (dest_type), |
a6fbd154 | 4530 | inv_op, src, xor_mask); |
d60edaba JJ |
4531 | gimple_set_location (stmt, bit_loc); |
4532 | if (load_addr[1] == NULL_TREE && gsi_bb (load_gsi[0])) | |
4533 | gimple_seq_add_stmt_without_update (&load_seq[0], stmt); | |
4534 | else | |
4535 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4536 | src = gimple_assign_lhs (stmt); | |
4537 | } | |
245f6de1 | 4538 | break; |
4b84d9b8 JJ |
4539 | case LROTATE_EXPR: |
4540 | case NOP_EXPR: | |
4541 | src = ops[0]; | |
4542 | if (!is_gimple_val (src)) | |
4543 | { | |
4544 | stmt = gimple_build_assign (make_ssa_name (TREE_TYPE (src)), | |
4545 | src); | |
4546 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4547 | src = gimple_assign_lhs (stmt); | |
4548 | } | |
e362a897 | 4549 | if (!useless_type_conversion_p (dest_type, TREE_TYPE (src))) |
4b84d9b8 | 4550 | { |
e362a897 | 4551 | stmt = gimple_build_assign (make_ssa_name (dest_type), |
4b84d9b8 JJ |
4552 | NOP_EXPR, src); |
4553 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4554 | src = gimple_assign_lhs (stmt); | |
4555 | } | |
e362a897 | 4556 | inv_op = invert_op (split_store, 2, dest_type, xor_mask); |
be52ac73 JJ |
4557 | if (inv_op != NOP_EXPR) |
4558 | { | |
e362a897 | 4559 | stmt = gimple_build_assign (make_ssa_name (dest_type), |
be52ac73 JJ |
4560 | inv_op, src, xor_mask); |
4561 | gimple_set_location (stmt, loc); | |
4562 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4563 | src = gimple_assign_lhs (stmt); | |
4564 | } | |
4b84d9b8 | 4565 | break; |
245f6de1 JJ |
4566 | default: |
4567 | src = ops[0]; | |
4568 | break; | |
4569 | } | |
4570 | ||
c94c3532 EB |
4571 | /* If bit insertion is required, we use the source as an accumulator |
4572 | into which the successive bit-field values are manually inserted. | |
4573 | FIXME: perhaps use BIT_INSERT_EXPR instead in some cases? */ | |
4574 | if (group->bit_insertion) | |
4575 | FOR_EACH_VEC_ELT (split_store->orig_stores, k, info) | |
4576 | if (info->rhs_code == BIT_INSERT_EXPR | |
4577 | && info->bitpos < try_bitpos + try_size | |
4578 | && info->bitpos + info->bitsize > try_bitpos) | |
4579 | { | |
4580 | /* Mask, truncate, convert to final type, shift and ior into | |
4581 | the accumulator. Note that every step can be a no-op. */ | |
4582 | const HOST_WIDE_INT start_gap = info->bitpos - try_bitpos; | |
4583 | const HOST_WIDE_INT end_gap | |
4584 | = (try_bitpos + try_size) - (info->bitpos + info->bitsize); | |
4585 | tree tem = info->ops[0].val; | |
ed01d707 EB |
4586 | if (!INTEGRAL_TYPE_P (TREE_TYPE (tem))) |
4587 | { | |
4588 | const unsigned HOST_WIDE_INT size | |
4589 | = tree_to_uhwi (TYPE_SIZE (TREE_TYPE (tem))); | |
4590 | tree integer_type | |
4591 | = build_nonstandard_integer_type (size, UNSIGNED); | |
4592 | tem = gimple_build (&seq, loc, VIEW_CONVERT_EXPR, | |
4593 | integer_type, tem); | |
4594 | } | |
c14add82 EB |
4595 | if (TYPE_PRECISION (TREE_TYPE (tem)) <= info->bitsize) |
4596 | { | |
4597 | tree bitfield_type | |
4598 | = build_nonstandard_integer_type (info->bitsize, | |
4599 | UNSIGNED); | |
4600 | tem = gimple_convert (&seq, loc, bitfield_type, tem); | |
4601 | } | |
4602 | else if ((BYTES_BIG_ENDIAN ? start_gap : end_gap) > 0) | |
c94c3532 EB |
4603 | { |
4604 | const unsigned HOST_WIDE_INT imask | |
4605 | = (HOST_WIDE_INT_1U << info->bitsize) - 1; | |
4606 | tem = gimple_build (&seq, loc, | |
4607 | BIT_AND_EXPR, TREE_TYPE (tem), tem, | |
4608 | build_int_cst (TREE_TYPE (tem), | |
4609 | imask)); | |
4610 | } | |
4611 | const HOST_WIDE_INT shift | |
4612 | = (BYTES_BIG_ENDIAN ? end_gap : start_gap); | |
4613 | if (shift < 0) | |
4614 | tem = gimple_build (&seq, loc, | |
4615 | RSHIFT_EXPR, TREE_TYPE (tem), tem, | |
4616 | build_int_cst (NULL_TREE, -shift)); | |
e362a897 | 4617 | tem = gimple_convert (&seq, loc, dest_type, tem); |
c94c3532 EB |
4618 | if (shift > 0) |
4619 | tem = gimple_build (&seq, loc, | |
e362a897 | 4620 | LSHIFT_EXPR, dest_type, tem, |
c94c3532 EB |
4621 | build_int_cst (NULL_TREE, shift)); |
4622 | src = gimple_build (&seq, loc, | |
e362a897 | 4623 | BIT_IOR_EXPR, dest_type, tem, src); |
c94c3532 EB |
4624 | } |
4625 | ||
a62b3dc5 JJ |
4626 | if (!integer_zerop (mask)) |
4627 | { | |
e362a897 | 4628 | tree tem = make_ssa_name (dest_type); |
a62b3dc5 JJ |
4629 | tree load_src = unshare_expr (dest); |
4630 | /* The load might load some or all bits uninitialized, | |
4631 | avoid -W*uninitialized warnings in that case. | |
4632 | As optimization, it would be nice if all the bits are | |
4633 | provably uninitialized (no stores at all yet or previous | |
4634 | store a CLOBBER) we'd optimize away the load and replace | |
4635 | it e.g. with 0. */ | |
e9e2bad7 | 4636 | suppress_warning (load_src, OPT_Wuninitialized); |
a62b3dc5 JJ |
4637 | stmt = gimple_build_assign (tem, load_src); |
4638 | gimple_set_location (stmt, loc); | |
4639 | gimple_set_vuse (stmt, new_vuse); | |
4640 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4641 | ||
4642 | /* FIXME: If there is a single chunk of zero bits in mask, | |
4643 | perhaps use BIT_INSERT_EXPR instead? */ | |
e362a897 | 4644 | stmt = gimple_build_assign (make_ssa_name (dest_type), |
a62b3dc5 JJ |
4645 | BIT_AND_EXPR, tem, mask); |
4646 | gimple_set_location (stmt, loc); | |
4647 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4648 | tem = gimple_assign_lhs (stmt); | |
4649 | ||
245f6de1 | 4650 | if (TREE_CODE (src) == INTEGER_CST) |
e362a897 | 4651 | src = wide_int_to_tree (dest_type, |
245f6de1 JJ |
4652 | wi::bit_and_not (wi::to_wide (src), |
4653 | wi::to_wide (mask))); | |
4654 | else | |
4655 | { | |
4656 | tree nmask | |
e362a897 | 4657 | = wide_int_to_tree (dest_type, |
245f6de1 | 4658 | wi::bit_not (wi::to_wide (mask))); |
e362a897 | 4659 | stmt = gimple_build_assign (make_ssa_name (dest_type), |
245f6de1 JJ |
4660 | BIT_AND_EXPR, src, nmask); |
4661 | gimple_set_location (stmt, loc); | |
4662 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4663 | src = gimple_assign_lhs (stmt); | |
4664 | } | |
e362a897 | 4665 | stmt = gimple_build_assign (make_ssa_name (dest_type), |
a62b3dc5 JJ |
4666 | BIT_IOR_EXPR, tem, src); |
4667 | gimple_set_location (stmt, loc); | |
4668 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4669 | src = gimple_assign_lhs (stmt); | |
4670 | } | |
4671 | } | |
f663d9ad KT |
4672 | |
4673 | stmt = gimple_build_assign (dest, src); | |
4674 | gimple_set_location (stmt, loc); | |
4675 | gimple_set_vuse (stmt, new_vuse); | |
4676 | gimple_seq_add_stmt_without_update (&seq, stmt); | |
4677 | ||
629387a6 EB |
4678 | if (group->lp_nr && stmt_could_throw_p (cfun, stmt)) |
4679 | add_stmt_to_eh_lp (stmt, group->lp_nr); | |
4680 | ||
f663d9ad KT |
4681 | tree new_vdef; |
4682 | if (i < split_stores.length () - 1) | |
a62b3dc5 | 4683 | new_vdef = make_ssa_name (gimple_vop (cfun), stmt); |
f663d9ad KT |
4684 | else |
4685 | new_vdef = last_vdef; | |
4686 | ||
4687 | gimple_set_vdef (stmt, new_vdef); | |
4688 | SSA_NAME_DEF_STMT (new_vdef) = stmt; | |
4689 | new_vuse = new_vdef; | |
4690 | } | |
4691 | ||
4692 | FOR_EACH_VEC_ELT (split_stores, i, split_store) | |
4693 | delete split_store; | |
4694 | ||
f663d9ad KT |
4695 | gcc_assert (seq); |
4696 | if (dump_file) | |
4697 | { | |
4698 | fprintf (dump_file, | |
c94c3532 | 4699 | "New sequence of %u stores to replace old one of %u stores\n", |
a62b3dc5 | 4700 | split_stores.length (), orig_num_stmts); |
f663d9ad KT |
4701 | if (dump_flags & TDF_DETAILS) |
4702 | print_gimple_seq (dump_file, seq, 0, TDF_VOPS | TDF_MEMSYMS); | |
4703 | } | |
629387a6 | 4704 | |
5384a802 JJ |
4705 | if (gimple_clobber_p (group->last_stmt)) |
4706 | update_stmt (group->last_stmt); | |
4707 | ||
629387a6 EB |
4708 | if (group->lp_nr > 0) |
4709 | { | |
4710 | /* We're going to insert a sequence of (potentially) throwing stores | |
4711 | into an active EH region. This means that we're going to create | |
4712 | new basic blocks with EH edges pointing to the post landing pad | |
4713 | and, therefore, to have to update its PHI nodes, if any. For the | |
4714 | virtual PHI node, we're going to use the VDEFs created above, but | |
4715 | for the other nodes, we need to record the original reaching defs. */ | |
4716 | eh_landing_pad lp = get_eh_landing_pad_from_number (group->lp_nr); | |
4717 | basic_block lp_bb = label_to_block (cfun, lp->post_landing_pad); | |
4718 | basic_block last_bb = gimple_bb (group->last_stmt); | |
4719 | edge last_edge = find_edge (last_bb, lp_bb); | |
4720 | auto_vec<tree, 16> last_defs; | |
4721 | gphi_iterator gpi; | |
4722 | for (gpi = gsi_start_phis (lp_bb); !gsi_end_p (gpi); gsi_next (&gpi)) | |
4723 | { | |
4724 | gphi *phi = gpi.phi (); | |
4725 | tree last_def; | |
4726 | if (virtual_operand_p (gimple_phi_result (phi))) | |
4727 | last_def = NULL_TREE; | |
4728 | else | |
4729 | last_def = gimple_phi_arg_def (phi, last_edge->dest_idx); | |
4730 | last_defs.safe_push (last_def); | |
4731 | } | |
4732 | ||
4733 | /* Do the insertion. Then, if new basic blocks have been created in the | |
4734 | process, rewind the chain of VDEFs create above to walk the new basic | |
4735 | blocks and update the corresponding arguments of the PHI nodes. */ | |
4736 | update_modified_stmts (seq); | |
4737 | if (gimple_find_sub_bbs (seq, &last_gsi)) | |
4738 | while (last_vdef != gimple_vuse (group->last_stmt)) | |
4739 | { | |
4740 | gimple *stmt = SSA_NAME_DEF_STMT (last_vdef); | |
4741 | if (stmt_could_throw_p (cfun, stmt)) | |
4742 | { | |
4743 | edge new_edge = find_edge (gimple_bb (stmt), lp_bb); | |
4744 | unsigned int i; | |
4745 | for (gpi = gsi_start_phis (lp_bb), i = 0; | |
4746 | !gsi_end_p (gpi); | |
4747 | gsi_next (&gpi), i++) | |
4748 | { | |
4749 | gphi *phi = gpi.phi (); | |
4750 | tree new_def; | |
4751 | if (virtual_operand_p (gimple_phi_result (phi))) | |
4752 | new_def = last_vdef; | |
4753 | else | |
4754 | new_def = last_defs[i]; | |
4755 | add_phi_arg (phi, new_def, new_edge, UNKNOWN_LOCATION); | |
4756 | } | |
4757 | } | |
4758 | last_vdef = gimple_vuse (stmt); | |
4759 | } | |
4760 | } | |
4761 | else | |
4762 | gsi_insert_seq_after (&last_gsi, seq, GSI_SAME_STMT); | |
4763 | ||
245f6de1 JJ |
4764 | for (int j = 0; j < 2; ++j) |
4765 | if (load_seq[j]) | |
4766 | gsi_insert_seq_after (&load_gsi[j], load_seq[j], GSI_SAME_STMT); | |
f663d9ad KT |
4767 | |
4768 | return true; | |
4769 | } | |
4770 | ||
4771 | /* Process the merged_store_group objects created in the coalescing phase. | |
4772 | The stores are all against the base object BASE. | |
4773 | Try to output the widened stores and delete the original statements if | |
4774 | successful. Return true iff any changes were made. */ | |
4775 | ||
4776 | bool | |
b5926e23 | 4777 | imm_store_chain_info::output_merged_stores () |
f663d9ad KT |
4778 | { |
4779 | unsigned int i; | |
4780 | merged_store_group *merged_store; | |
4781 | bool ret = false; | |
4782 | FOR_EACH_VEC_ELT (m_merged_store_groups, i, merged_store) | |
4783 | { | |
a95b474a ML |
4784 | if (dbg_cnt (store_merging) |
4785 | && output_merged_store (merged_store)) | |
f663d9ad KT |
4786 | { |
4787 | unsigned int j; | |
4788 | store_immediate_info *store; | |
4789 | FOR_EACH_VEC_ELT (merged_store->stores, j, store) | |
4790 | { | |
4791 | gimple *stmt = store->stmt; | |
4792 | gimple_stmt_iterator gsi = gsi_for_stmt (stmt); | |
5384a802 JJ |
4793 | /* Don't remove clobbers, they are still useful even if |
4794 | everything is overwritten afterwards. */ | |
4795 | if (gimple_clobber_p (stmt)) | |
4796 | continue; | |
f663d9ad | 4797 | gsi_remove (&gsi, true); |
629387a6 EB |
4798 | if (store->lp_nr) |
4799 | remove_stmt_from_eh_lp (stmt); | |
f663d9ad KT |
4800 | if (stmt != merged_store->last_stmt) |
4801 | { | |
4802 | unlink_stmt_vdef (stmt); | |
4803 | release_defs (stmt); | |
4804 | } | |
4805 | } | |
4806 | ret = true; | |
4807 | } | |
4808 | } | |
4809 | if (ret && dump_file) | |
4810 | fprintf (dump_file, "Merging successful!\n"); | |
4811 | ||
4812 | return ret; | |
4813 | } | |
4814 | ||
4815 | /* Coalesce the store_immediate_info objects recorded against the base object | |
4816 | BASE in the first phase and output them. | |
4817 | Delete the allocated structures. | |
4818 | Return true if any changes were made. */ | |
4819 | ||
4820 | bool | |
b5926e23 | 4821 | imm_store_chain_info::terminate_and_process_chain () |
f663d9ad | 4822 | { |
95d94b52 RB |
4823 | if (dump_file && (dump_flags & TDF_DETAILS)) |
4824 | fprintf (dump_file, "Terminating chain with %u stores\n", | |
4825 | m_store_info.length ()); | |
f663d9ad KT |
4826 | /* Process store chain. */ |
4827 | bool ret = false; | |
4828 | if (m_store_info.length () > 1) | |
4829 | { | |
4830 | ret = coalesce_immediate_stores (); | |
4831 | if (ret) | |
b5926e23 | 4832 | ret = output_merged_stores (); |
f663d9ad KT |
4833 | } |
4834 | ||
4835 | /* Delete all the entries we allocated ourselves. */ | |
4836 | store_immediate_info *info; | |
4837 | unsigned int i; | |
4838 | FOR_EACH_VEC_ELT (m_store_info, i, info) | |
4839 | delete info; | |
4840 | ||
4841 | merged_store_group *merged_info; | |
4842 | FOR_EACH_VEC_ELT (m_merged_store_groups, i, merged_info) | |
4843 | delete merged_info; | |
4844 | ||
4845 | return ret; | |
4846 | } | |
4847 | ||
4848 | /* Return true iff LHS is a destination potentially interesting for | |
4849 | store merging. In practice these are the codes that get_inner_reference | |
4850 | can process. */ | |
4851 | ||
4852 | static bool | |
4853 | lhs_valid_for_store_merging_p (tree lhs) | |
4854 | { | |
629387a6 | 4855 | if (DECL_P (lhs)) |
f663d9ad KT |
4856 | return true; |
4857 | ||
629387a6 EB |
4858 | switch (TREE_CODE (lhs)) |
4859 | { | |
4860 | case ARRAY_REF: | |
4861 | case ARRAY_RANGE_REF: | |
4862 | case BIT_FIELD_REF: | |
4863 | case COMPONENT_REF: | |
4864 | case MEM_REF: | |
e362a897 | 4865 | case VIEW_CONVERT_EXPR: |
629387a6 EB |
4866 | return true; |
4867 | default: | |
4868 | return false; | |
4869 | } | |
f663d9ad KT |
4870 | } |
4871 | ||
4872 | /* Return true if the tree RHS is a constant we want to consider | |
4873 | during store merging. In practice accept all codes that | |
4874 | native_encode_expr accepts. */ | |
4875 | ||
4876 | static bool | |
4877 | rhs_valid_for_store_merging_p (tree rhs) | |
4878 | { | |
cf098191 | 4879 | unsigned HOST_WIDE_INT size; |
3afd514b | 4880 | if (TREE_CODE (rhs) == CONSTRUCTOR |
3afd514b JJ |
4881 | && CONSTRUCTOR_NELTS (rhs) == 0 |
4882 | && TYPE_SIZE_UNIT (TREE_TYPE (rhs)) | |
4883 | && tree_fits_uhwi_p (TYPE_SIZE_UNIT (TREE_TYPE (rhs)))) | |
4884 | return true; | |
cf098191 RS |
4885 | return (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (rhs))).is_constant (&size) |
4886 | && native_encode_expr (rhs, NULL, size) != 0); | |
f663d9ad KT |
4887 | } |
4888 | ||
629387a6 EB |
4889 | /* Adjust *PBITPOS, *PBITREGION_START and *PBITREGION_END by BYTE_OFF bytes |
4890 | and return true on success or false on failure. */ | |
4891 | ||
4892 | static bool | |
4893 | adjust_bit_pos (poly_offset_int byte_off, | |
4894 | poly_int64 *pbitpos, | |
4895 | poly_uint64 *pbitregion_start, | |
4896 | poly_uint64 *pbitregion_end) | |
4897 | { | |
4898 | poly_offset_int bit_off = byte_off << LOG2_BITS_PER_UNIT; | |
4899 | bit_off += *pbitpos; | |
4900 | ||
4901 | if (known_ge (bit_off, 0) && bit_off.to_shwi (pbitpos)) | |
4902 | { | |
4903 | if (maybe_ne (*pbitregion_end, 0U)) | |
4904 | { | |
4905 | bit_off = byte_off << LOG2_BITS_PER_UNIT; | |
4906 | bit_off += *pbitregion_start; | |
4907 | if (bit_off.to_uhwi (pbitregion_start)) | |
4908 | { | |
4909 | bit_off = byte_off << LOG2_BITS_PER_UNIT; | |
4910 | bit_off += *pbitregion_end; | |
4911 | if (!bit_off.to_uhwi (pbitregion_end)) | |
4912 | *pbitregion_end = 0; | |
4913 | } | |
4914 | else | |
4915 | *pbitregion_end = 0; | |
4916 | } | |
4917 | return true; | |
4918 | } | |
4919 | else | |
4920 | return false; | |
4921 | } | |
4922 | ||
245f6de1 JJ |
4923 | /* If MEM is a memory reference usable for store merging (either as |
4924 | store destination or for loads), return the non-NULL base_addr | |
4925 | and set *PBITSIZE, *PBITPOS, *PBITREGION_START and *PBITREGION_END. | |
4926 | Otherwise return NULL, *PBITPOS should be still valid even for that | |
4927 | case. */ | |
4928 | ||
4929 | static tree | |
8a91d545 RS |
4930 | mem_valid_for_store_merging (tree mem, poly_uint64 *pbitsize, |
4931 | poly_uint64 *pbitpos, | |
4932 | poly_uint64 *pbitregion_start, | |
4933 | poly_uint64 *pbitregion_end) | |
245f6de1 | 4934 | { |
8a91d545 RS |
4935 | poly_int64 bitsize, bitpos; |
4936 | poly_uint64 bitregion_start = 0, bitregion_end = 0; | |
245f6de1 JJ |
4937 | machine_mode mode; |
4938 | int unsignedp = 0, reversep = 0, volatilep = 0; | |
4939 | tree offset; | |
4940 | tree base_addr = get_inner_reference (mem, &bitsize, &bitpos, &offset, &mode, | |
4941 | &unsignedp, &reversep, &volatilep); | |
4942 | *pbitsize = bitsize; | |
8a91d545 | 4943 | if (known_eq (bitsize, 0)) |
245f6de1 JJ |
4944 | return NULL_TREE; |
4945 | ||
4946 | if (TREE_CODE (mem) == COMPONENT_REF | |
4947 | && DECL_BIT_FIELD_TYPE (TREE_OPERAND (mem, 1))) | |
4948 | { | |
4949 | get_bit_range (&bitregion_start, &bitregion_end, mem, &bitpos, &offset); | |
8a91d545 RS |
4950 | if (maybe_ne (bitregion_end, 0U)) |
4951 | bitregion_end += 1; | |
245f6de1 JJ |
4952 | } |
4953 | ||
4954 | if (reversep) | |
4955 | return NULL_TREE; | |
4956 | ||
4957 | /* We do not want to rewrite TARGET_MEM_REFs. */ | |
4958 | if (TREE_CODE (base_addr) == TARGET_MEM_REF) | |
4959 | return NULL_TREE; | |
4960 | /* In some cases get_inner_reference may return a | |
4961 | MEM_REF [ptr + byteoffset]. For the purposes of this pass | |
4962 | canonicalize the base_addr to MEM_REF [ptr] and take | |
4963 | byteoffset into account in the bitpos. This occurs in | |
4964 | PR 23684 and this way we can catch more chains. */ | |
4965 | else if (TREE_CODE (base_addr) == MEM_REF) | |
4966 | { | |
629387a6 EB |
4967 | if (!adjust_bit_pos (mem_ref_offset (base_addr), &bitpos, |
4968 | &bitregion_start, &bitregion_end)) | |
245f6de1 JJ |
4969 | return NULL_TREE; |
4970 | base_addr = TREE_OPERAND (base_addr, 0); | |
4971 | } | |
4972 | /* get_inner_reference returns the base object, get at its | |
4973 | address now. */ | |
4974 | else | |
4975 | { | |
8a91d545 | 4976 | if (maybe_lt (bitpos, 0)) |
245f6de1 JJ |
4977 | return NULL_TREE; |
4978 | base_addr = build_fold_addr_expr (base_addr); | |
4979 | } | |
4980 | ||
629387a6 | 4981 | if (offset) |
245f6de1 JJ |
4982 | { |
4983 | /* If the access is variable offset then a base decl has to be | |
4984 | address-taken to be able to emit pointer-based stores to it. | |
4985 | ??? We might be able to get away with re-using the original | |
4986 | base up to the first variable part and then wrapping that inside | |
4987 | a BIT_FIELD_REF. */ | |
4988 | tree base = get_base_address (base_addr); | |
629387a6 | 4989 | if (!base || (DECL_P (base) && !TREE_ADDRESSABLE (base))) |
245f6de1 JJ |
4990 | return NULL_TREE; |
4991 | ||
629387a6 EB |
4992 | /* Similarly to above for the base, remove constant from the offset. */ |
4993 | if (TREE_CODE (offset) == PLUS_EXPR | |
4994 | && TREE_CODE (TREE_OPERAND (offset, 1)) == INTEGER_CST | |
4995 | && adjust_bit_pos (wi::to_poly_offset (TREE_OPERAND (offset, 1)), | |
4996 | &bitpos, &bitregion_start, &bitregion_end)) | |
4997 | offset = TREE_OPERAND (offset, 0); | |
4998 | ||
245f6de1 JJ |
4999 | base_addr = build2 (POINTER_PLUS_EXPR, TREE_TYPE (base_addr), |
5000 | base_addr, offset); | |
5001 | } | |
5002 | ||
629387a6 EB |
5003 | if (known_eq (bitregion_end, 0U)) |
5004 | { | |
5005 | bitregion_start = round_down_to_byte_boundary (bitpos); | |
5006 | bitregion_end = round_up_to_byte_boundary (bitpos + bitsize); | |
5007 | } | |
5008 | ||
245f6de1 JJ |
5009 | *pbitsize = bitsize; |
5010 | *pbitpos = bitpos; | |
5011 | *pbitregion_start = bitregion_start; | |
5012 | *pbitregion_end = bitregion_end; | |
5013 | return base_addr; | |
5014 | } | |
5015 | ||
5016 | /* Return true if STMT is a load that can be used for store merging. | |
5017 | In that case fill in *OP. BITSIZE, BITPOS, BITREGION_START and | |
5018 | BITREGION_END are properties of the corresponding store. */ | |
5019 | ||
5020 | static bool | |
5021 | handled_load (gimple *stmt, store_operand_info *op, | |
8a91d545 RS |
5022 | poly_uint64 bitsize, poly_uint64 bitpos, |
5023 | poly_uint64 bitregion_start, poly_uint64 bitregion_end) | |
245f6de1 | 5024 | { |
383ac8dc | 5025 | if (!is_gimple_assign (stmt)) |
245f6de1 | 5026 | return false; |
383ac8dc JJ |
5027 | if (gimple_assign_rhs_code (stmt) == BIT_NOT_EXPR) |
5028 | { | |
5029 | tree rhs1 = gimple_assign_rhs1 (stmt); | |
5030 | if (TREE_CODE (rhs1) == SSA_NAME | |
383ac8dc JJ |
5031 | && handled_load (SSA_NAME_DEF_STMT (rhs1), op, bitsize, bitpos, |
5032 | bitregion_start, bitregion_end)) | |
5033 | { | |
d60edaba JJ |
5034 | /* Don't allow _1 = load; _2 = ~1; _3 = ~_2; which should have |
5035 | been optimized earlier, but if allowed here, would confuse the | |
5036 | multiple uses counting. */ | |
5037 | if (op->bit_not_p) | |
5038 | return false; | |
383ac8dc JJ |
5039 | op->bit_not_p = !op->bit_not_p; |
5040 | return true; | |
5041 | } | |
5042 | return false; | |
5043 | } | |
5044 | if (gimple_vuse (stmt) | |
5045 | && gimple_assign_load_p (stmt) | |
36bbc05d | 5046 | && !stmt_can_throw_internal (cfun, stmt) |
245f6de1 JJ |
5047 | && !gimple_has_volatile_ops (stmt)) |
5048 | { | |
5049 | tree mem = gimple_assign_rhs1 (stmt); | |
5050 | op->base_addr | |
5051 | = mem_valid_for_store_merging (mem, &op->bitsize, &op->bitpos, | |
5052 | &op->bitregion_start, | |
5053 | &op->bitregion_end); | |
5054 | if (op->base_addr != NULL_TREE | |
8a91d545 RS |
5055 | && known_eq (op->bitsize, bitsize) |
5056 | && multiple_p (op->bitpos - bitpos, BITS_PER_UNIT) | |
5057 | && known_ge (op->bitpos - op->bitregion_start, | |
5058 | bitpos - bitregion_start) | |
5059 | && known_ge (op->bitregion_end - op->bitpos, | |
5060 | bitregion_end - bitpos)) | |
245f6de1 JJ |
5061 | { |
5062 | op->stmt = stmt; | |
5063 | op->val = mem; | |
383ac8dc | 5064 | op->bit_not_p = false; |
245f6de1 JJ |
5065 | return true; |
5066 | } | |
5067 | } | |
5068 | return false; | |
5069 | } | |
5070 | ||
629387a6 EB |
5071 | /* Return the index number of the landing pad for STMT, if any. */ |
5072 | ||
5073 | static int | |
5074 | lp_nr_for_store (gimple *stmt) | |
5075 | { | |
5076 | if (!cfun->can_throw_non_call_exceptions || !cfun->eh) | |
5077 | return 0; | |
5078 | ||
5079 | if (!stmt_could_throw_p (cfun, stmt)) | |
5080 | return 0; | |
5081 | ||
5082 | return lookup_stmt_eh_lp (stmt); | |
5083 | } | |
5084 | ||
245f6de1 | 5085 | /* Record the store STMT for store merging optimization if it can be |
629387a6 | 5086 | optimized. Return true if any changes were made. */ |
245f6de1 | 5087 | |
629387a6 | 5088 | bool |
245f6de1 JJ |
5089 | pass_store_merging::process_store (gimple *stmt) |
5090 | { | |
5091 | tree lhs = gimple_assign_lhs (stmt); | |
5092 | tree rhs = gimple_assign_rhs1 (stmt); | |
2c832ffe SSF |
5093 | poly_uint64 bitsize, bitpos = 0; |
5094 | poly_uint64 bitregion_start = 0, bitregion_end = 0; | |
245f6de1 JJ |
5095 | tree base_addr |
5096 | = mem_valid_for_store_merging (lhs, &bitsize, &bitpos, | |
5097 | &bitregion_start, &bitregion_end); | |
8a91d545 | 5098 | if (known_eq (bitsize, 0U)) |
629387a6 | 5099 | return false; |
245f6de1 JJ |
5100 | |
5101 | bool invalid = (base_addr == NULL_TREE | |
8a91d545 RS |
5102 | || (maybe_gt (bitsize, |
5103 | (unsigned int) MAX_BITSIZE_MODE_ANY_INT) | |
3afd514b JJ |
5104 | && TREE_CODE (rhs) != INTEGER_CST |
5105 | && (TREE_CODE (rhs) != CONSTRUCTOR | |
5106 | || CONSTRUCTOR_NELTS (rhs) != 0))); | |
245f6de1 | 5107 | enum tree_code rhs_code = ERROR_MARK; |
d60edaba | 5108 | bool bit_not_p = false; |
4b84d9b8 JJ |
5109 | struct symbolic_number n; |
5110 | gimple *ins_stmt = NULL; | |
245f6de1 JJ |
5111 | store_operand_info ops[2]; |
5112 | if (invalid) | |
5113 | ; | |
e362a897 EB |
5114 | else if (TREE_CODE (rhs) == STRING_CST) |
5115 | { | |
5116 | rhs_code = STRING_CST; | |
5117 | ops[0].val = rhs; | |
5118 | } | |
245f6de1 JJ |
5119 | else if (rhs_valid_for_store_merging_p (rhs)) |
5120 | { | |
5121 | rhs_code = INTEGER_CST; | |
5122 | ops[0].val = rhs; | |
5123 | } | |
e362a897 | 5124 | else if (TREE_CODE (rhs) == SSA_NAME) |
245f6de1 JJ |
5125 | { |
5126 | gimple *def_stmt = SSA_NAME_DEF_STMT (rhs), *def_stmt1, *def_stmt2; | |
5127 | if (!is_gimple_assign (def_stmt)) | |
5128 | invalid = true; | |
5129 | else if (handled_load (def_stmt, &ops[0], bitsize, bitpos, | |
5130 | bitregion_start, bitregion_end)) | |
5131 | rhs_code = MEM_REF; | |
d60edaba JJ |
5132 | else if (gimple_assign_rhs_code (def_stmt) == BIT_NOT_EXPR) |
5133 | { | |
5134 | tree rhs1 = gimple_assign_rhs1 (def_stmt); | |
5135 | if (TREE_CODE (rhs1) == SSA_NAME | |
5136 | && is_gimple_assign (SSA_NAME_DEF_STMT (rhs1))) | |
5137 | { | |
5138 | bit_not_p = true; | |
5139 | def_stmt = SSA_NAME_DEF_STMT (rhs1); | |
5140 | } | |
5141 | } | |
c94c3532 | 5142 | |
d60edaba | 5143 | if (rhs_code == ERROR_MARK && !invalid) |
245f6de1 JJ |
5144 | switch ((rhs_code = gimple_assign_rhs_code (def_stmt))) |
5145 | { | |
5146 | case BIT_AND_EXPR: | |
5147 | case BIT_IOR_EXPR: | |
5148 | case BIT_XOR_EXPR: | |
5149 | tree rhs1, rhs2; | |
5150 | rhs1 = gimple_assign_rhs1 (def_stmt); | |
5151 | rhs2 = gimple_assign_rhs2 (def_stmt); | |
5152 | invalid = true; | |
d7a9512e | 5153 | if (TREE_CODE (rhs1) != SSA_NAME) |
245f6de1 JJ |
5154 | break; |
5155 | def_stmt1 = SSA_NAME_DEF_STMT (rhs1); | |
5156 | if (!is_gimple_assign (def_stmt1) | |
5157 | || !handled_load (def_stmt1, &ops[0], bitsize, bitpos, | |
5158 | bitregion_start, bitregion_end)) | |
5159 | break; | |
5160 | if (rhs_valid_for_store_merging_p (rhs2)) | |
5161 | ops[1].val = rhs2; | |
d7a9512e | 5162 | else if (TREE_CODE (rhs2) != SSA_NAME) |
245f6de1 JJ |
5163 | break; |
5164 | else | |
5165 | { | |
5166 | def_stmt2 = SSA_NAME_DEF_STMT (rhs2); | |
5167 | if (!is_gimple_assign (def_stmt2)) | |
5168 | break; | |
5169 | else if (!handled_load (def_stmt2, &ops[1], bitsize, bitpos, | |
5170 | bitregion_start, bitregion_end)) | |
5171 | break; | |
5172 | } | |
5173 | invalid = false; | |
5174 | break; | |
5175 | default: | |
5176 | invalid = true; | |
5177 | break; | |
5178 | } | |
c94c3532 | 5179 | |
8a91d545 RS |
5180 | unsigned HOST_WIDE_INT const_bitsize; |
5181 | if (bitsize.is_constant (&const_bitsize) | |
c94c3532 | 5182 | && (const_bitsize % BITS_PER_UNIT) == 0 |
8a91d545 | 5183 | && const_bitsize <= 64 |
c94c3532 | 5184 | && multiple_p (bitpos, BITS_PER_UNIT)) |
4b84d9b8 JJ |
5185 | { |
5186 | ins_stmt = find_bswap_or_nop_1 (def_stmt, &n, 12); | |
5187 | if (ins_stmt) | |
5188 | { | |
5189 | uint64_t nn = n.n; | |
5190 | for (unsigned HOST_WIDE_INT i = 0; | |
8a91d545 RS |
5191 | i < const_bitsize; |
5192 | i += BITS_PER_UNIT, nn >>= BITS_PER_MARKER) | |
4b84d9b8 JJ |
5193 | if ((nn & MARKER_MASK) == 0 |
5194 | || (nn & MARKER_MASK) == MARKER_BYTE_UNKNOWN) | |
5195 | { | |
5196 | ins_stmt = NULL; | |
5197 | break; | |
5198 | } | |
5199 | if (ins_stmt) | |
5200 | { | |
5201 | if (invalid) | |
5202 | { | |
5203 | rhs_code = LROTATE_EXPR; | |
5204 | ops[0].base_addr = NULL_TREE; | |
5205 | ops[1].base_addr = NULL_TREE; | |
5206 | } | |
5207 | invalid = false; | |
5208 | } | |
5209 | } | |
5210 | } | |
c94c3532 EB |
5211 | |
5212 | if (invalid | |
5213 | && bitsize.is_constant (&const_bitsize) | |
5214 | && ((const_bitsize % BITS_PER_UNIT) != 0 | |
5215 | || !multiple_p (bitpos, BITS_PER_UNIT)) | |
ed01d707 | 5216 | && const_bitsize <= MAX_FIXED_MODE_SIZE) |
c94c3532 | 5217 | { |
c14add82 | 5218 | /* Bypass a conversion to the bit-field type. */ |
31a5d8c5 EB |
5219 | if (!bit_not_p |
5220 | && is_gimple_assign (def_stmt) | |
5221 | && CONVERT_EXPR_CODE_P (rhs_code)) | |
c94c3532 EB |
5222 | { |
5223 | tree rhs1 = gimple_assign_rhs1 (def_stmt); | |
5224 | if (TREE_CODE (rhs1) == SSA_NAME | |
c14add82 | 5225 | && INTEGRAL_TYPE_P (TREE_TYPE (rhs1))) |
c94c3532 EB |
5226 | rhs = rhs1; |
5227 | } | |
5228 | rhs_code = BIT_INSERT_EXPR; | |
31a5d8c5 | 5229 | bit_not_p = false; |
c94c3532 EB |
5230 | ops[0].val = rhs; |
5231 | ops[0].base_addr = NULL_TREE; | |
5232 | ops[1].base_addr = NULL_TREE; | |
5233 | invalid = false; | |
5234 | } | |
245f6de1 | 5235 | } |
e362a897 EB |
5236 | else |
5237 | invalid = true; | |
245f6de1 | 5238 | |
8a91d545 RS |
5239 | unsigned HOST_WIDE_INT const_bitsize, const_bitpos; |
5240 | unsigned HOST_WIDE_INT const_bitregion_start, const_bitregion_end; | |
5241 | if (invalid | |
5242 | || !bitsize.is_constant (&const_bitsize) | |
5243 | || !bitpos.is_constant (&const_bitpos) | |
5244 | || !bitregion_start.is_constant (&const_bitregion_start) | |
5245 | || !bitregion_end.is_constant (&const_bitregion_end)) | |
629387a6 | 5246 | return terminate_all_aliasing_chains (NULL, stmt); |
245f6de1 | 5247 | |
4b84d9b8 JJ |
5248 | if (!ins_stmt) |
5249 | memset (&n, 0, sizeof (n)); | |
5250 | ||
99b1c316 | 5251 | class imm_store_chain_info **chain_info = NULL; |
629387a6 | 5252 | bool ret = false; |
383ac8dc JJ |
5253 | if (base_addr) |
5254 | chain_info = m_stores.get (base_addr); | |
5255 | ||
245f6de1 JJ |
5256 | store_immediate_info *info; |
5257 | if (chain_info) | |
5258 | { | |
5259 | unsigned int ord = (*chain_info)->m_store_info.length (); | |
8a91d545 RS |
5260 | info = new store_immediate_info (const_bitsize, const_bitpos, |
5261 | const_bitregion_start, | |
5262 | const_bitregion_end, | |
5263 | stmt, ord, rhs_code, n, ins_stmt, | |
629387a6 EB |
5264 | bit_not_p, lp_nr_for_store (stmt), |
5265 | ops[0], ops[1]); | |
245f6de1 JJ |
5266 | if (dump_file && (dump_flags & TDF_DETAILS)) |
5267 | { | |
5268 | fprintf (dump_file, "Recording immediate store from stmt:\n"); | |
5269 | print_gimple_stmt (dump_file, stmt, 0); | |
5270 | } | |
5271 | (*chain_info)->m_store_info.safe_push (info); | |
95d94b52 | 5272 | m_n_stores++; |
629387a6 | 5273 | ret |= terminate_all_aliasing_chains (chain_info, stmt); |
245f6de1 JJ |
5274 | /* If we reach the limit of stores to merge in a chain terminate and |
5275 | process the chain now. */ | |
5276 | if ((*chain_info)->m_store_info.length () | |
028d4092 | 5277 | == (unsigned int) param_max_stores_to_merge) |
245f6de1 JJ |
5278 | { |
5279 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5280 | fprintf (dump_file, | |
5281 | "Reached maximum number of statements to merge:\n"); | |
629387a6 | 5282 | ret |= terminate_and_process_chain (*chain_info); |
245f6de1 | 5283 | } |
245f6de1 | 5284 | } |
95d94b52 RB |
5285 | else |
5286 | { | |
5287 | /* Store aliases any existing chain? */ | |
5288 | ret |= terminate_all_aliasing_chains (NULL, stmt); | |
245f6de1 | 5289 | |
95d94b52 RB |
5290 | /* Start a new chain. */ |
5291 | class imm_store_chain_info *new_chain | |
5292 | = new imm_store_chain_info (m_stores_head, base_addr); | |
5293 | info = new store_immediate_info (const_bitsize, const_bitpos, | |
5294 | const_bitregion_start, | |
5295 | const_bitregion_end, | |
5296 | stmt, 0, rhs_code, n, ins_stmt, | |
5297 | bit_not_p, lp_nr_for_store (stmt), | |
5298 | ops[0], ops[1]); | |
5299 | new_chain->m_store_info.safe_push (info); | |
5300 | m_n_stores++; | |
5301 | m_stores.put (base_addr, new_chain); | |
5302 | m_n_chains++; | |
5303 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5304 | { | |
5305 | fprintf (dump_file, "Starting active chain number %u with statement:\n", | |
5306 | m_n_chains); | |
5307 | print_gimple_stmt (dump_file, stmt, 0); | |
5308 | fprintf (dump_file, "The base object is:\n"); | |
5309 | print_generic_expr (dump_file, base_addr); | |
5310 | fprintf (dump_file, "\n"); | |
5311 | } | |
5312 | } | |
5313 | ||
5314 | /* Prune oldest chains so that after adding the chain or store above | |
5315 | we're again within the limits set by the params. */ | |
5316 | if (m_n_chains > (unsigned)param_max_store_chains_to_track | |
5317 | || m_n_stores > (unsigned)param_max_stores_to_track) | |
245f6de1 | 5318 | { |
95d94b52 RB |
5319 | if (dump_file && (dump_flags & TDF_DETAILS)) |
5320 | fprintf (dump_file, "Too many chains (%u > %d) or stores (%u > %d), " | |
5321 | "terminating oldest chain(s).\n", m_n_chains, | |
5322 | param_max_store_chains_to_track, m_n_stores, | |
5323 | param_max_stores_to_track); | |
5324 | imm_store_chain_info **e = &m_stores_head; | |
5325 | unsigned idx = 0; | |
5326 | unsigned n_stores = 0; | |
5327 | while (*e) | |
5328 | { | |
5329 | if (idx >= (unsigned)param_max_store_chains_to_track | |
5330 | || (n_stores + (*e)->m_store_info.length () | |
5331 | > (unsigned)param_max_stores_to_track)) | |
8a8eee6b | 5332 | ret |= terminate_and_process_chain (*e); |
95d94b52 RB |
5333 | else |
5334 | { | |
5335 | n_stores += (*e)->m_store_info.length (); | |
5336 | e = &(*e)->next; | |
5337 | ++idx; | |
5338 | } | |
5339 | } | |
245f6de1 | 5340 | } |
95d94b52 | 5341 | |
629387a6 EB |
5342 | return ret; |
5343 | } | |
5344 | ||
5345 | /* Return true if STMT is a store valid for store merging. */ | |
5346 | ||
5347 | static bool | |
5348 | store_valid_for_store_merging_p (gimple *stmt) | |
5349 | { | |
5350 | return gimple_assign_single_p (stmt) | |
5351 | && gimple_vdef (stmt) | |
5352 | && lhs_valid_for_store_merging_p (gimple_assign_lhs (stmt)) | |
5384a802 | 5353 | && (!gimple_has_volatile_ops (stmt) || gimple_clobber_p (stmt)); |
629387a6 EB |
5354 | } |
5355 | ||
5356 | enum basic_block_status { BB_INVALID, BB_VALID, BB_EXTENDED_VALID }; | |
5357 | ||
5358 | /* Return the status of basic block BB wrt store merging. */ | |
5359 | ||
5360 | static enum basic_block_status | |
5361 | get_status_for_store_merging (basic_block bb) | |
5362 | { | |
5363 | unsigned int num_statements = 0; | |
a7553ad6 | 5364 | unsigned int num_constructors = 0; |
629387a6 EB |
5365 | gimple_stmt_iterator gsi; |
5366 | edge e; | |
5367 | ||
5368 | for (gsi = gsi_after_labels (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
5369 | { | |
5370 | gimple *stmt = gsi_stmt (gsi); | |
5371 | ||
5372 | if (is_gimple_debug (stmt)) | |
5373 | continue; | |
5374 | ||
5375 | if (store_valid_for_store_merging_p (stmt) && ++num_statements >= 2) | |
5376 | break; | |
a7553ad6 JJ |
5377 | |
5378 | if (is_gimple_assign (stmt) | |
5379 | && gimple_assign_rhs_code (stmt) == CONSTRUCTOR) | |
5380 | { | |
5381 | tree rhs = gimple_assign_rhs1 (stmt); | |
5382 | if (VECTOR_TYPE_P (TREE_TYPE (rhs)) | |
5383 | && INTEGRAL_TYPE_P (TREE_TYPE (TREE_TYPE (rhs))) | |
5384 | && gimple_assign_lhs (stmt) != NULL_TREE) | |
5385 | { | |
5386 | HOST_WIDE_INT sz | |
5387 | = int_size_in_bytes (TREE_TYPE (rhs)) * BITS_PER_UNIT; | |
5388 | if (sz == 16 || sz == 32 || sz == 64) | |
5389 | { | |
5390 | num_constructors = 1; | |
5391 | break; | |
5392 | } | |
5393 | } | |
5394 | } | |
629387a6 EB |
5395 | } |
5396 | ||
a7553ad6 | 5397 | if (num_statements == 0 && num_constructors == 0) |
629387a6 EB |
5398 | return BB_INVALID; |
5399 | ||
5400 | if (cfun->can_throw_non_call_exceptions && cfun->eh | |
5401 | && store_valid_for_store_merging_p (gimple_seq_last_stmt (bb_seq (bb))) | |
5402 | && (e = find_fallthru_edge (bb->succs)) | |
5403 | && e->dest == bb->next_bb) | |
5404 | return BB_EXTENDED_VALID; | |
5405 | ||
a7553ad6 | 5406 | return (num_statements >= 2 || num_constructors) ? BB_VALID : BB_INVALID; |
245f6de1 JJ |
5407 | } |
5408 | ||
f663d9ad | 5409 | /* Entry point for the pass. Go over each basic block recording chains of |
245f6de1 JJ |
5410 | immediate stores. Upon encountering a terminating statement (as defined |
5411 | by stmt_terminates_chain_p) process the recorded stores and emit the widened | |
5412 | variants. */ | |
f663d9ad KT |
5413 | |
5414 | unsigned int | |
5415 | pass_store_merging::execute (function *fun) | |
5416 | { | |
5417 | basic_block bb; | |
5418 | hash_set<gimple *> orig_stmts; | |
629387a6 EB |
5419 | bool changed = false, open_chains = false; |
5420 | ||
5421 | /* If the function can throw and catch non-call exceptions, we'll be trying | |
5422 | to merge stores across different basic blocks so we need to first unsplit | |
5423 | the EH edges in order to streamline the CFG of the function. */ | |
5424 | if (cfun->can_throw_non_call_exceptions && cfun->eh) | |
5425 | unsplit_eh_edges (); | |
f663d9ad | 5426 | |
4b84d9b8 JJ |
5427 | calculate_dominance_info (CDI_DOMINATORS); |
5428 | ||
f663d9ad KT |
5429 | FOR_EACH_BB_FN (bb, fun) |
5430 | { | |
629387a6 | 5431 | const basic_block_status bb_status = get_status_for_store_merging (bb); |
f663d9ad | 5432 | gimple_stmt_iterator gsi; |
f663d9ad | 5433 | |
629387a6 EB |
5434 | if (open_chains && (bb_status == BB_INVALID || !single_pred_p (bb))) |
5435 | { | |
5436 | changed |= terminate_and_process_all_chains (); | |
5437 | open_chains = false; | |
f663d9ad KT |
5438 | } |
5439 | ||
629387a6 | 5440 | if (bb_status == BB_INVALID) |
f663d9ad KT |
5441 | continue; |
5442 | ||
5443 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5444 | fprintf (dump_file, "Processing basic block <%d>:\n", bb->index); | |
5445 | ||
a7553ad6 | 5446 | for (gsi = gsi_after_labels (bb); !gsi_end_p (gsi); ) |
f663d9ad KT |
5447 | { |
5448 | gimple *stmt = gsi_stmt (gsi); | |
a7553ad6 | 5449 | gsi_next (&gsi); |
f663d9ad | 5450 | |
50b6d676 AO |
5451 | if (is_gimple_debug (stmt)) |
5452 | continue; | |
5453 | ||
5384a802 | 5454 | if (gimple_has_volatile_ops (stmt) && !gimple_clobber_p (stmt)) |
f663d9ad KT |
5455 | { |
5456 | /* Terminate all chains. */ | |
5457 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5458 | fprintf (dump_file, "Volatile access terminates " | |
5459 | "all chains\n"); | |
629387a6 EB |
5460 | changed |= terminate_and_process_all_chains (); |
5461 | open_chains = false; | |
f663d9ad KT |
5462 | continue; |
5463 | } | |
5464 | ||
a7553ad6 JJ |
5465 | if (is_gimple_assign (stmt) |
5466 | && gimple_assign_rhs_code (stmt) == CONSTRUCTOR | |
5467 | && maybe_optimize_vector_constructor (stmt)) | |
5468 | continue; | |
5469 | ||
629387a6 EB |
5470 | if (store_valid_for_store_merging_p (stmt)) |
5471 | changed |= process_store (stmt); | |
245f6de1 | 5472 | else |
629387a6 EB |
5473 | changed |= terminate_all_aliasing_chains (NULL, stmt); |
5474 | } | |
5475 | ||
5476 | if (bb_status == BB_EXTENDED_VALID) | |
5477 | open_chains = true; | |
5478 | else | |
5479 | { | |
5480 | changed |= terminate_and_process_all_chains (); | |
5481 | open_chains = false; | |
f663d9ad | 5482 | } |
f663d9ad | 5483 | } |
629387a6 EB |
5484 | |
5485 | if (open_chains) | |
5486 | changed |= terminate_and_process_all_chains (); | |
5487 | ||
5488 | /* If the function can throw and catch non-call exceptions and something | |
5489 | changed during the pass, then the CFG has (very likely) changed too. */ | |
5490 | if (cfun->can_throw_non_call_exceptions && cfun->eh && changed) | |
5491 | { | |
5492 | free_dominance_info (CDI_DOMINATORS); | |
5493 | return TODO_cleanup_cfg; | |
5494 | } | |
5495 | ||
f663d9ad KT |
5496 | return 0; |
5497 | } | |
5498 | ||
5499 | } // anon namespace | |
5500 | ||
5501 | /* Construct and return a store merging pass object. */ | |
5502 | ||
5503 | gimple_opt_pass * | |
5504 | make_pass_store_merging (gcc::context *ctxt) | |
5505 | { | |
5506 | return new pass_store_merging (ctxt); | |
5507 | } | |
c22d8787 KT |
5508 | |
5509 | #if CHECKING_P | |
5510 | ||
5511 | namespace selftest { | |
5512 | ||
5513 | /* Selftests for store merging helpers. */ | |
5514 | ||
5515 | /* Assert that all elements of the byte arrays X and Y, both of length N | |
5516 | are equal. */ | |
5517 | ||
5518 | static void | |
5519 | verify_array_eq (unsigned char *x, unsigned char *y, unsigned int n) | |
5520 | { | |
5521 | for (unsigned int i = 0; i < n; i++) | |
5522 | { | |
5523 | if (x[i] != y[i]) | |
5524 | { | |
5525 | fprintf (stderr, "Arrays do not match. X:\n"); | |
5526 | dump_char_array (stderr, x, n); | |
5527 | fprintf (stderr, "Y:\n"); | |
5528 | dump_char_array (stderr, y, n); | |
5529 | } | |
5530 | ASSERT_EQ (x[i], y[i]); | |
5531 | } | |
5532 | } | |
5533 | ||
8aba425f | 5534 | /* Test shift_bytes_in_array_left and that it carries bits across between |
c22d8787 KT |
5535 | bytes correctly. */ |
5536 | ||
5537 | static void | |
8aba425f | 5538 | verify_shift_bytes_in_array_left (void) |
c22d8787 KT |
5539 | { |
5540 | /* byte 1 | byte 0 | |
5541 | 00011111 | 11100000. */ | |
5542 | unsigned char orig[2] = { 0xe0, 0x1f }; | |
5543 | unsigned char in[2]; | |
5544 | memcpy (in, orig, sizeof orig); | |
5545 | ||
5546 | unsigned char expected[2] = { 0x80, 0x7f }; | |
8aba425f | 5547 | shift_bytes_in_array_left (in, sizeof (in), 2); |
c22d8787 KT |
5548 | verify_array_eq (in, expected, sizeof (in)); |
5549 | ||
5550 | memcpy (in, orig, sizeof orig); | |
5551 | memcpy (expected, orig, sizeof orig); | |
5552 | /* Check that shifting by zero doesn't change anything. */ | |
8aba425f | 5553 | shift_bytes_in_array_left (in, sizeof (in), 0); |
c22d8787 KT |
5554 | verify_array_eq (in, expected, sizeof (in)); |
5555 | ||
5556 | } | |
5557 | ||
5558 | /* Test shift_bytes_in_array_right and that it carries bits across between | |
5559 | bytes correctly. */ | |
5560 | ||
5561 | static void | |
5562 | verify_shift_bytes_in_array_right (void) | |
5563 | { | |
5564 | /* byte 1 | byte 0 | |
5565 | 00011111 | 11100000. */ | |
5566 | unsigned char orig[2] = { 0x1f, 0xe0}; | |
5567 | unsigned char in[2]; | |
5568 | memcpy (in, orig, sizeof orig); | |
5569 | unsigned char expected[2] = { 0x07, 0xf8}; | |
5570 | shift_bytes_in_array_right (in, sizeof (in), 2); | |
5571 | verify_array_eq (in, expected, sizeof (in)); | |
5572 | ||
5573 | memcpy (in, orig, sizeof orig); | |
5574 | memcpy (expected, orig, sizeof orig); | |
5575 | /* Check that shifting by zero doesn't change anything. */ | |
5576 | shift_bytes_in_array_right (in, sizeof (in), 0); | |
5577 | verify_array_eq (in, expected, sizeof (in)); | |
5578 | } | |
5579 | ||
5580 | /* Test clear_bit_region that it clears exactly the bits asked and | |
5581 | nothing more. */ | |
5582 | ||
5583 | static void | |
5584 | verify_clear_bit_region (void) | |
5585 | { | |
5586 | /* Start with all bits set and test clearing various patterns in them. */ | |
5587 | unsigned char orig[3] = { 0xff, 0xff, 0xff}; | |
5588 | unsigned char in[3]; | |
5589 | unsigned char expected[3]; | |
5590 | memcpy (in, orig, sizeof in); | |
5591 | ||
5592 | /* Check zeroing out all the bits. */ | |
5593 | clear_bit_region (in, 0, 3 * BITS_PER_UNIT); | |
5594 | expected[0] = expected[1] = expected[2] = 0; | |
5595 | verify_array_eq (in, expected, sizeof in); | |
5596 | ||
5597 | memcpy (in, orig, sizeof in); | |
5598 | /* Leave the first and last bits intact. */ | |
5599 | clear_bit_region (in, 1, 3 * BITS_PER_UNIT - 2); | |
5600 | expected[0] = 0x1; | |
5601 | expected[1] = 0; | |
5602 | expected[2] = 0x80; | |
5603 | verify_array_eq (in, expected, sizeof in); | |
5604 | } | |
5605 | ||
5384a802 | 5606 | /* Test clear_bit_region_be that it clears exactly the bits asked and |
c22d8787 KT |
5607 | nothing more. */ |
5608 | ||
5609 | static void | |
5610 | verify_clear_bit_region_be (void) | |
5611 | { | |
5612 | /* Start with all bits set and test clearing various patterns in them. */ | |
5613 | unsigned char orig[3] = { 0xff, 0xff, 0xff}; | |
5614 | unsigned char in[3]; | |
5615 | unsigned char expected[3]; | |
5616 | memcpy (in, orig, sizeof in); | |
5617 | ||
5618 | /* Check zeroing out all the bits. */ | |
5619 | clear_bit_region_be (in, BITS_PER_UNIT - 1, 3 * BITS_PER_UNIT); | |
5620 | expected[0] = expected[1] = expected[2] = 0; | |
5621 | verify_array_eq (in, expected, sizeof in); | |
5622 | ||
5623 | memcpy (in, orig, sizeof in); | |
5624 | /* Leave the first and last bits intact. */ | |
5625 | clear_bit_region_be (in, BITS_PER_UNIT - 2, 3 * BITS_PER_UNIT - 2); | |
5626 | expected[0] = 0x80; | |
5627 | expected[1] = 0; | |
5628 | expected[2] = 0x1; | |
5629 | verify_array_eq (in, expected, sizeof in); | |
5630 | } | |
5631 | ||
5632 | ||
5633 | /* Run all of the selftests within this file. */ | |
5634 | ||
5635 | void | |
5636 | store_merging_c_tests (void) | |
5637 | { | |
8aba425f | 5638 | verify_shift_bytes_in_array_left (); |
c22d8787 KT |
5639 | verify_shift_bytes_in_array_right (); |
5640 | verify_clear_bit_region (); | |
5641 | verify_clear_bit_region_be (); | |
5642 | } | |
5643 | ||
5644 | } // namespace selftest | |
5645 | #endif /* CHECKING_P. */ |