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629b3d75 MJ |
1 | /* Bits of OpenMP and OpenACC handling that is specific to device offloading |
2 | and a lowering pass for OpenACC device directives. | |
3 | ||
a5544970 | 4 | Copyright (C) 2005-2019 Free Software Foundation, Inc. |
629b3d75 MJ |
5 | |
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 3, or (at your option) any later | |
11 | version. | |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GCC; see the file COPYING3. If not see | |
20 | <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "coretypes.h" | |
25 | #include "backend.h" | |
26 | #include "target.h" | |
27 | #include "tree.h" | |
28 | #include "gimple.h" | |
29 | #include "tree-pass.h" | |
30 | #include "ssa.h" | |
31 | #include "cgraph.h" | |
32 | #include "pretty-print.h" | |
33 | #include "diagnostic-core.h" | |
34 | #include "fold-const.h" | |
35 | #include "internal-fn.h" | |
0c6b03b5 | 36 | #include "langhooks.h" |
629b3d75 MJ |
37 | #include "gimplify.h" |
38 | #include "gimple-iterator.h" | |
39 | #include "gimplify-me.h" | |
40 | #include "gimple-walk.h" | |
41 | #include "tree-cfg.h" | |
42 | #include "tree-into-ssa.h" | |
0c6b03b5 AM |
43 | #include "tree-nested.h" |
44 | #include "stor-layout.h" | |
629b3d75 MJ |
45 | #include "common/common-target.h" |
46 | #include "omp-general.h" | |
47 | #include "omp-offload.h" | |
48 | #include "lto-section-names.h" | |
49 | #include "gomp-constants.h" | |
50 | #include "gimple-pretty-print.h" | |
324ff1a0 | 51 | #include "intl.h" |
314e6352 ML |
52 | #include "stringpool.h" |
53 | #include "attribs.h" | |
f64b12bd | 54 | #include "cfgloop.h" |
629b3d75 MJ |
55 | |
56 | /* Describe the OpenACC looping structure of a function. The entire | |
57 | function is held in a 'NULL' loop. */ | |
58 | ||
59 | struct oacc_loop | |
60 | { | |
61 | oacc_loop *parent; /* Containing loop. */ | |
62 | ||
63 | oacc_loop *child; /* First inner loop. */ | |
64 | ||
65 | oacc_loop *sibling; /* Next loop within same parent. */ | |
66 | ||
67 | location_t loc; /* Location of the loop start. */ | |
68 | ||
69 | gcall *marker; /* Initial head marker. */ | |
70 | ||
01914336 MJ |
71 | gcall *heads[GOMP_DIM_MAX]; /* Head marker functions. */ |
72 | gcall *tails[GOMP_DIM_MAX]; /* Tail marker functions. */ | |
629b3d75 MJ |
73 | |
74 | tree routine; /* Pseudo-loop enclosing a routine. */ | |
75 | ||
76 | unsigned mask; /* Partitioning mask. */ | |
02889d23 | 77 | unsigned e_mask; /* Partitioning of element loops (when tiling). */ |
629b3d75 MJ |
78 | unsigned inner; /* Partitioning of inner loops. */ |
79 | unsigned flags; /* Partitioning flags. */ | |
02889d23 | 80 | vec<gcall *> ifns; /* Contained loop abstraction functions. */ |
629b3d75 MJ |
81 | tree chunk_size; /* Chunk size. */ |
82 | gcall *head_end; /* Final marker of head sequence. */ | |
83 | }; | |
84 | ||
85 | /* Holds offload tables with decls. */ | |
86 | vec<tree, va_gc> *offload_funcs, *offload_vars; | |
87 | ||
88 | /* Return level at which oacc routine may spawn a partitioned loop, or | |
89 | -1 if it is not a routine (i.e. is an offload fn). */ | |
90 | ||
4c187162 | 91 | int |
629b3d75 MJ |
92 | oacc_fn_attrib_level (tree attr) |
93 | { | |
94 | tree pos = TREE_VALUE (attr); | |
95 | ||
96 | if (!TREE_PURPOSE (pos)) | |
97 | return -1; | |
98 | ||
99 | int ix = 0; | |
100 | for (ix = 0; ix != GOMP_DIM_MAX; | |
101 | ix++, pos = TREE_CHAIN (pos)) | |
102 | if (!integer_zerop (TREE_PURPOSE (pos))) | |
103 | break; | |
104 | ||
105 | return ix; | |
106 | } | |
107 | ||
108 | /* Helper function for omp_finish_file routine. Takes decls from V_DECLS and | |
109 | adds their addresses and sizes to constructor-vector V_CTOR. */ | |
110 | ||
111 | static void | |
112 | add_decls_addresses_to_decl_constructor (vec<tree, va_gc> *v_decls, | |
113 | vec<constructor_elt, va_gc> *v_ctor) | |
114 | { | |
115 | unsigned len = vec_safe_length (v_decls); | |
116 | for (unsigned i = 0; i < len; i++) | |
117 | { | |
118 | tree it = (*v_decls)[i]; | |
119 | bool is_var = VAR_P (it); | |
120 | bool is_link_var | |
121 | = is_var | |
122 | #ifdef ACCEL_COMPILER | |
123 | && DECL_HAS_VALUE_EXPR_P (it) | |
124 | #endif | |
125 | && lookup_attribute ("omp declare target link", DECL_ATTRIBUTES (it)); | |
126 | ||
127 | tree size = NULL_TREE; | |
128 | if (is_var) | |
129 | size = fold_convert (const_ptr_type_node, DECL_SIZE_UNIT (it)); | |
130 | ||
131 | tree addr; | |
132 | if (!is_link_var) | |
133 | addr = build_fold_addr_expr (it); | |
134 | else | |
135 | { | |
136 | #ifdef ACCEL_COMPILER | |
137 | /* For "omp declare target link" vars add address of the pointer to | |
138 | the target table, instead of address of the var. */ | |
139 | tree value_expr = DECL_VALUE_EXPR (it); | |
140 | tree link_ptr_decl = TREE_OPERAND (value_expr, 0); | |
141 | varpool_node::finalize_decl (link_ptr_decl); | |
142 | addr = build_fold_addr_expr (link_ptr_decl); | |
143 | #else | |
144 | addr = build_fold_addr_expr (it); | |
145 | #endif | |
146 | ||
147 | /* Most significant bit of the size marks "omp declare target link" | |
148 | vars in host and target tables. */ | |
149 | unsigned HOST_WIDE_INT isize = tree_to_uhwi (size); | |
150 | isize |= 1ULL << (int_size_in_bytes (const_ptr_type_node) | |
151 | * BITS_PER_UNIT - 1); | |
152 | size = wide_int_to_tree (const_ptr_type_node, isize); | |
153 | } | |
154 | ||
155 | CONSTRUCTOR_APPEND_ELT (v_ctor, NULL_TREE, addr); | |
156 | if (is_var) | |
157 | CONSTRUCTOR_APPEND_ELT (v_ctor, NULL_TREE, size); | |
158 | } | |
159 | } | |
160 | ||
161 | /* Create new symbols containing (address, size) pairs for global variables, | |
162 | marked with "omp declare target" attribute, as well as addresses for the | |
163 | functions, which are outlined offloading regions. */ | |
164 | void | |
165 | omp_finish_file (void) | |
166 | { | |
167 | unsigned num_funcs = vec_safe_length (offload_funcs); | |
168 | unsigned num_vars = vec_safe_length (offload_vars); | |
169 | ||
170 | if (num_funcs == 0 && num_vars == 0) | |
171 | return; | |
172 | ||
173 | if (targetm_common.have_named_sections) | |
174 | { | |
175 | vec<constructor_elt, va_gc> *v_f, *v_v; | |
176 | vec_alloc (v_f, num_funcs); | |
177 | vec_alloc (v_v, num_vars * 2); | |
178 | ||
179 | add_decls_addresses_to_decl_constructor (offload_funcs, v_f); | |
180 | add_decls_addresses_to_decl_constructor (offload_vars, v_v); | |
181 | ||
182 | tree vars_decl_type = build_array_type_nelts (pointer_sized_int_node, | |
183 | num_vars * 2); | |
184 | tree funcs_decl_type = build_array_type_nelts (pointer_sized_int_node, | |
185 | num_funcs); | |
186 | SET_TYPE_ALIGN (vars_decl_type, TYPE_ALIGN (pointer_sized_int_node)); | |
187 | SET_TYPE_ALIGN (funcs_decl_type, TYPE_ALIGN (pointer_sized_int_node)); | |
188 | tree ctor_v = build_constructor (vars_decl_type, v_v); | |
189 | tree ctor_f = build_constructor (funcs_decl_type, v_f); | |
190 | TREE_CONSTANT (ctor_v) = TREE_CONSTANT (ctor_f) = 1; | |
191 | TREE_STATIC (ctor_v) = TREE_STATIC (ctor_f) = 1; | |
192 | tree funcs_decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, | |
193 | get_identifier (".offload_func_table"), | |
194 | funcs_decl_type); | |
195 | tree vars_decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, | |
196 | get_identifier (".offload_var_table"), | |
197 | vars_decl_type); | |
198 | TREE_STATIC (funcs_decl) = TREE_STATIC (vars_decl) = 1; | |
199 | /* Do not align tables more than TYPE_ALIGN (pointer_sized_int_node), | |
200 | otherwise a joint table in a binary will contain padding between | |
201 | tables from multiple object files. */ | |
202 | DECL_USER_ALIGN (funcs_decl) = DECL_USER_ALIGN (vars_decl) = 1; | |
203 | SET_DECL_ALIGN (funcs_decl, TYPE_ALIGN (funcs_decl_type)); | |
204 | SET_DECL_ALIGN (vars_decl, TYPE_ALIGN (vars_decl_type)); | |
205 | DECL_INITIAL (funcs_decl) = ctor_f; | |
206 | DECL_INITIAL (vars_decl) = ctor_v; | |
207 | set_decl_section_name (funcs_decl, OFFLOAD_FUNC_TABLE_SECTION_NAME); | |
208 | set_decl_section_name (vars_decl, OFFLOAD_VAR_TABLE_SECTION_NAME); | |
209 | ||
210 | varpool_node::finalize_decl (vars_decl); | |
211 | varpool_node::finalize_decl (funcs_decl); | |
212 | } | |
213 | else | |
214 | { | |
215 | for (unsigned i = 0; i < num_funcs; i++) | |
216 | { | |
217 | tree it = (*offload_funcs)[i]; | |
218 | targetm.record_offload_symbol (it); | |
219 | } | |
220 | for (unsigned i = 0; i < num_vars; i++) | |
221 | { | |
222 | tree it = (*offload_vars)[i]; | |
223 | targetm.record_offload_symbol (it); | |
224 | } | |
225 | } | |
226 | } | |
227 | ||
02889d23 CLT |
228 | /* Call dim_pos (POS == true) or dim_size (POS == false) builtins for |
229 | axis DIM. Return a tmp var holding the result. */ | |
230 | ||
231 | static tree | |
232 | oacc_dim_call (bool pos, int dim, gimple_seq *seq) | |
233 | { | |
234 | tree arg = build_int_cst (unsigned_type_node, dim); | |
235 | tree size = create_tmp_var (integer_type_node); | |
236 | enum internal_fn fn = pos ? IFN_GOACC_DIM_POS : IFN_GOACC_DIM_SIZE; | |
237 | gimple *call = gimple_build_call_internal (fn, 1, arg); | |
238 | ||
239 | gimple_call_set_lhs (call, size); | |
240 | gimple_seq_add_stmt (seq, call); | |
241 | ||
242 | return size; | |
243 | } | |
244 | ||
629b3d75 MJ |
245 | /* Find the number of threads (POS = false), or thread number (POS = |
246 | true) for an OpenACC region partitioned as MASK. Setup code | |
247 | required for the calculation is added to SEQ. */ | |
248 | ||
249 | static tree | |
250 | oacc_thread_numbers (bool pos, int mask, gimple_seq *seq) | |
251 | { | |
252 | tree res = pos ? NULL_TREE : build_int_cst (unsigned_type_node, 1); | |
253 | unsigned ix; | |
254 | ||
255 | /* Start at gang level, and examine relevant dimension indices. */ | |
256 | for (ix = GOMP_DIM_GANG; ix != GOMP_DIM_MAX; ix++) | |
257 | if (GOMP_DIM_MASK (ix) & mask) | |
258 | { | |
629b3d75 MJ |
259 | if (res) |
260 | { | |
261 | /* We had an outer index, so scale that by the size of | |
262 | this dimension. */ | |
02889d23 | 263 | tree n = oacc_dim_call (false, ix, seq); |
629b3d75 MJ |
264 | res = fold_build2 (MULT_EXPR, integer_type_node, res, n); |
265 | } | |
266 | if (pos) | |
267 | { | |
268 | /* Determine index in this dimension. */ | |
02889d23 | 269 | tree id = oacc_dim_call (true, ix, seq); |
629b3d75 MJ |
270 | if (res) |
271 | res = fold_build2 (PLUS_EXPR, integer_type_node, res, id); | |
272 | else | |
273 | res = id; | |
274 | } | |
275 | } | |
276 | ||
277 | if (res == NULL_TREE) | |
278 | res = integer_zero_node; | |
279 | ||
280 | return res; | |
281 | } | |
282 | ||
283 | /* Transform IFN_GOACC_LOOP calls to actual code. See | |
284 | expand_oacc_for for where these are generated. At the vector | |
285 | level, we stride loops, such that each member of a warp will | |
286 | operate on adjacent iterations. At the worker and gang level, | |
287 | each gang/warp executes a set of contiguous iterations. Chunking | |
288 | can override this such that each iteration engine executes a | |
01914336 | 289 | contiguous chunk, and then moves on to stride to the next chunk. */ |
629b3d75 MJ |
290 | |
291 | static void | |
292 | oacc_xform_loop (gcall *call) | |
293 | { | |
294 | gimple_stmt_iterator gsi = gsi_for_stmt (call); | |
295 | enum ifn_goacc_loop_kind code | |
296 | = (enum ifn_goacc_loop_kind) TREE_INT_CST_LOW (gimple_call_arg (call, 0)); | |
297 | tree dir = gimple_call_arg (call, 1); | |
298 | tree range = gimple_call_arg (call, 2); | |
299 | tree step = gimple_call_arg (call, 3); | |
300 | tree chunk_size = NULL_TREE; | |
301 | unsigned mask = (unsigned) TREE_INT_CST_LOW (gimple_call_arg (call, 5)); | |
302 | tree lhs = gimple_call_lhs (call); | |
303 | tree type = TREE_TYPE (lhs); | |
304 | tree diff_type = TREE_TYPE (range); | |
305 | tree r = NULL_TREE; | |
306 | gimple_seq seq = NULL; | |
307 | bool chunking = false, striding = true; | |
308 | unsigned outer_mask = mask & (~mask + 1); // Outermost partitioning | |
309 | unsigned inner_mask = mask & ~outer_mask; // Inner partitioning (if any) | |
310 | ||
311 | #ifdef ACCEL_COMPILER | |
312 | chunk_size = gimple_call_arg (call, 4); | |
313 | if (integer_minus_onep (chunk_size) /* Force static allocation. */ | |
314 | || integer_zerop (chunk_size)) /* Default (also static). */ | |
315 | { | |
316 | /* If we're at the gang level, we want each to execute a | |
317 | contiguous run of iterations. Otherwise we want each element | |
318 | to stride. */ | |
319 | striding = !(outer_mask & GOMP_DIM_MASK (GOMP_DIM_GANG)); | |
320 | chunking = false; | |
321 | } | |
322 | else | |
323 | { | |
324 | /* Chunk of size 1 is striding. */ | |
325 | striding = integer_onep (chunk_size); | |
326 | chunking = !striding; | |
327 | } | |
328 | #endif | |
329 | ||
330 | /* striding=true, chunking=true | |
331 | -> invalid. | |
332 | striding=true, chunking=false | |
333 | -> chunks=1 | |
334 | striding=false,chunking=true | |
335 | -> chunks=ceil (range/(chunksize*threads*step)) | |
336 | striding=false,chunking=false | |
337 | -> chunk_size=ceil(range/(threads*step)),chunks=1 */ | |
338 | push_gimplify_context (true); | |
339 | ||
340 | switch (code) | |
341 | { | |
342 | default: gcc_unreachable (); | |
343 | ||
344 | case IFN_GOACC_LOOP_CHUNKS: | |
345 | if (!chunking) | |
346 | r = build_int_cst (type, 1); | |
347 | else | |
348 | { | |
349 | /* chunk_max | |
350 | = (range - dir) / (chunks * step * num_threads) + dir */ | |
351 | tree per = oacc_thread_numbers (false, mask, &seq); | |
352 | per = fold_convert (type, per); | |
353 | chunk_size = fold_convert (type, chunk_size); | |
354 | per = fold_build2 (MULT_EXPR, type, per, chunk_size); | |
355 | per = fold_build2 (MULT_EXPR, type, per, step); | |
356 | r = build2 (MINUS_EXPR, type, range, dir); | |
357 | r = build2 (PLUS_EXPR, type, r, per); | |
358 | r = build2 (TRUNC_DIV_EXPR, type, r, per); | |
359 | } | |
360 | break; | |
361 | ||
362 | case IFN_GOACC_LOOP_STEP: | |
363 | { | |
364 | /* If striding, step by the entire compute volume, otherwise | |
365 | step by the inner volume. */ | |
366 | unsigned volume = striding ? mask : inner_mask; | |
367 | ||
368 | r = oacc_thread_numbers (false, volume, &seq); | |
369 | r = build2 (MULT_EXPR, type, fold_convert (type, r), step); | |
370 | } | |
371 | break; | |
372 | ||
373 | case IFN_GOACC_LOOP_OFFSET: | |
f64b12bd CP |
374 | /* Enable vectorization on non-SIMT targets. */ |
375 | if (!targetm.simt.vf | |
376 | && outer_mask == GOMP_DIM_MASK (GOMP_DIM_VECTOR) | |
377 | /* If not -fno-tree-loop-vectorize, hint that we want to vectorize | |
378 | the loop. */ | |
379 | && (flag_tree_loop_vectorize | |
380 | || !global_options_set.x_flag_tree_loop_vectorize)) | |
381 | { | |
382 | basic_block bb = gsi_bb (gsi); | |
383 | struct loop *parent = bb->loop_father; | |
384 | struct loop *body = parent->inner; | |
385 | ||
386 | parent->force_vectorize = true; | |
387 | parent->safelen = INT_MAX; | |
388 | ||
389 | /* "Chunking loops" may have inner loops. */ | |
390 | if (parent->inner) | |
391 | { | |
392 | body->force_vectorize = true; | |
393 | body->safelen = INT_MAX; | |
394 | } | |
395 | ||
396 | cfun->has_force_vectorize_loops = true; | |
397 | } | |
629b3d75 MJ |
398 | if (striding) |
399 | { | |
400 | r = oacc_thread_numbers (true, mask, &seq); | |
401 | r = fold_convert (diff_type, r); | |
402 | } | |
403 | else | |
404 | { | |
405 | tree inner_size = oacc_thread_numbers (false, inner_mask, &seq); | |
406 | tree outer_size = oacc_thread_numbers (false, outer_mask, &seq); | |
407 | tree volume = fold_build2 (MULT_EXPR, TREE_TYPE (inner_size), | |
408 | inner_size, outer_size); | |
409 | ||
410 | volume = fold_convert (diff_type, volume); | |
411 | if (chunking) | |
412 | chunk_size = fold_convert (diff_type, chunk_size); | |
413 | else | |
414 | { | |
415 | tree per = fold_build2 (MULT_EXPR, diff_type, volume, step); | |
416 | ||
417 | chunk_size = build2 (MINUS_EXPR, diff_type, range, dir); | |
418 | chunk_size = build2 (PLUS_EXPR, diff_type, chunk_size, per); | |
419 | chunk_size = build2 (TRUNC_DIV_EXPR, diff_type, chunk_size, per); | |
420 | } | |
421 | ||
422 | tree span = build2 (MULT_EXPR, diff_type, chunk_size, | |
423 | fold_convert (diff_type, inner_size)); | |
424 | r = oacc_thread_numbers (true, outer_mask, &seq); | |
425 | r = fold_convert (diff_type, r); | |
426 | r = build2 (MULT_EXPR, diff_type, r, span); | |
427 | ||
428 | tree inner = oacc_thread_numbers (true, inner_mask, &seq); | |
429 | inner = fold_convert (diff_type, inner); | |
430 | r = fold_build2 (PLUS_EXPR, diff_type, r, inner); | |
431 | ||
432 | if (chunking) | |
433 | { | |
434 | tree chunk = fold_convert (diff_type, gimple_call_arg (call, 6)); | |
435 | tree per | |
436 | = fold_build2 (MULT_EXPR, diff_type, volume, chunk_size); | |
437 | per = build2 (MULT_EXPR, diff_type, per, chunk); | |
438 | ||
439 | r = build2 (PLUS_EXPR, diff_type, r, per); | |
440 | } | |
441 | } | |
442 | r = fold_build2 (MULT_EXPR, diff_type, r, step); | |
443 | if (type != diff_type) | |
444 | r = fold_convert (type, r); | |
445 | break; | |
446 | ||
447 | case IFN_GOACC_LOOP_BOUND: | |
448 | if (striding) | |
449 | r = range; | |
450 | else | |
451 | { | |
452 | tree inner_size = oacc_thread_numbers (false, inner_mask, &seq); | |
453 | tree outer_size = oacc_thread_numbers (false, outer_mask, &seq); | |
454 | tree volume = fold_build2 (MULT_EXPR, TREE_TYPE (inner_size), | |
455 | inner_size, outer_size); | |
456 | ||
457 | volume = fold_convert (diff_type, volume); | |
458 | if (chunking) | |
459 | chunk_size = fold_convert (diff_type, chunk_size); | |
460 | else | |
461 | { | |
462 | tree per = fold_build2 (MULT_EXPR, diff_type, volume, step); | |
463 | ||
464 | chunk_size = build2 (MINUS_EXPR, diff_type, range, dir); | |
465 | chunk_size = build2 (PLUS_EXPR, diff_type, chunk_size, per); | |
466 | chunk_size = build2 (TRUNC_DIV_EXPR, diff_type, chunk_size, per); | |
467 | } | |
468 | ||
469 | tree span = build2 (MULT_EXPR, diff_type, chunk_size, | |
470 | fold_convert (diff_type, inner_size)); | |
471 | ||
472 | r = fold_build2 (MULT_EXPR, diff_type, span, step); | |
473 | ||
474 | tree offset = gimple_call_arg (call, 6); | |
475 | r = build2 (PLUS_EXPR, diff_type, r, | |
476 | fold_convert (diff_type, offset)); | |
477 | r = build2 (integer_onep (dir) ? MIN_EXPR : MAX_EXPR, | |
478 | diff_type, r, range); | |
479 | } | |
480 | if (diff_type != type) | |
481 | r = fold_convert (type, r); | |
482 | break; | |
483 | } | |
484 | ||
485 | gimplify_assign (lhs, r, &seq); | |
486 | ||
487 | pop_gimplify_context (NULL); | |
488 | ||
489 | gsi_replace_with_seq (&gsi, seq, true); | |
490 | } | |
491 | ||
02889d23 CLT |
492 | /* Transform a GOACC_TILE call. Determines the element loop span for |
493 | the specified loop of the nest. This is 1 if we're not tiling. | |
494 | ||
495 | GOACC_TILE (collapse_count, loop_no, tile_arg, gwv_tile, gwv_element); */ | |
496 | ||
497 | static void | |
498 | oacc_xform_tile (gcall *call) | |
499 | { | |
500 | gimple_stmt_iterator gsi = gsi_for_stmt (call); | |
501 | unsigned collapse = tree_to_uhwi (gimple_call_arg (call, 0)); | |
502 | /* Inner loops have higher loop_nos. */ | |
503 | unsigned loop_no = tree_to_uhwi (gimple_call_arg (call, 1)); | |
504 | tree tile_size = gimple_call_arg (call, 2); | |
505 | unsigned e_mask = tree_to_uhwi (gimple_call_arg (call, 4)); | |
506 | tree lhs = gimple_call_lhs (call); | |
507 | tree type = TREE_TYPE (lhs); | |
508 | gimple_seq seq = NULL; | |
509 | tree span = build_int_cst (type, 1); | |
510 | ||
511 | gcc_assert (!(e_mask | |
512 | & ~(GOMP_DIM_MASK (GOMP_DIM_VECTOR) | |
513 | | GOMP_DIM_MASK (GOMP_DIM_WORKER)))); | |
514 | push_gimplify_context (!seen_error ()); | |
515 | ||
516 | #ifndef ACCEL_COMPILER | |
517 | /* Partitioning disabled on host compilers. */ | |
518 | e_mask = 0; | |
519 | #endif | |
520 | if (!e_mask) | |
521 | /* Not paritioning. */ | |
522 | span = integer_one_node; | |
523 | else if (!integer_zerop (tile_size)) | |
524 | /* User explicitly specified size. */ | |
525 | span = tile_size; | |
526 | else | |
527 | { | |
528 | /* Pick a size based on the paritioning of the element loop and | |
529 | the number of loop nests. */ | |
530 | tree first_size = NULL_TREE; | |
531 | tree second_size = NULL_TREE; | |
532 | ||
533 | if (e_mask & GOMP_DIM_MASK (GOMP_DIM_VECTOR)) | |
534 | first_size = oacc_dim_call (false, GOMP_DIM_VECTOR, &seq); | |
535 | if (e_mask & GOMP_DIM_MASK (GOMP_DIM_WORKER)) | |
536 | second_size = oacc_dim_call (false, GOMP_DIM_WORKER, &seq); | |
537 | ||
538 | if (!first_size) | |
539 | { | |
540 | first_size = second_size; | |
541 | second_size = NULL_TREE; | |
542 | } | |
543 | ||
544 | if (loop_no + 1 == collapse) | |
545 | { | |
546 | span = first_size; | |
547 | if (!loop_no && second_size) | |
548 | span = fold_build2 (MULT_EXPR, TREE_TYPE (span), | |
549 | span, second_size); | |
550 | } | |
551 | else if (loop_no + 2 == collapse) | |
552 | span = second_size; | |
553 | else | |
554 | span = NULL_TREE; | |
555 | ||
556 | if (!span) | |
557 | /* There's no obvious element size for this loop. Options | |
558 | are 1, first_size or some non-unity constant (32 is my | |
559 | favourite). We should gather some statistics. */ | |
560 | span = first_size; | |
561 | } | |
562 | ||
563 | span = fold_convert (type, span); | |
564 | gimplify_assign (lhs, span, &seq); | |
565 | ||
566 | pop_gimplify_context (NULL); | |
567 | ||
568 | gsi_replace_with_seq (&gsi, seq, true); | |
569 | } | |
570 | ||
629b3d75 MJ |
571 | /* Default partitioned and minimum partitioned dimensions. */ |
572 | ||
573 | static int oacc_default_dims[GOMP_DIM_MAX]; | |
574 | static int oacc_min_dims[GOMP_DIM_MAX]; | |
575 | ||
b75e9c83 TV |
576 | int |
577 | oacc_get_default_dim (int dim) | |
578 | { | |
579 | gcc_assert (0 <= dim && dim < GOMP_DIM_MAX); | |
580 | return oacc_default_dims[dim]; | |
581 | } | |
582 | ||
629b3d75 MJ |
583 | /* Parse the default dimension parameter. This is a set of |
584 | :-separated optional compute dimensions. Each specified dimension | |
585 | is a positive integer. When device type support is added, it is | |
586 | planned to be a comma separated list of such compute dimensions, | |
587 | with all but the first prefixed by the colon-terminated device | |
588 | type. */ | |
589 | ||
590 | static void | |
591 | oacc_parse_default_dims (const char *dims) | |
592 | { | |
593 | int ix; | |
594 | ||
595 | for (ix = GOMP_DIM_MAX; ix--;) | |
596 | { | |
597 | oacc_default_dims[ix] = -1; | |
598 | oacc_min_dims[ix] = 1; | |
599 | } | |
600 | ||
601 | #ifndef ACCEL_COMPILER | |
602 | /* Cannot be overridden on the host. */ | |
603 | dims = NULL; | |
604 | #endif | |
605 | if (dims) | |
606 | { | |
607 | const char *pos = dims; | |
608 | ||
609 | for (ix = 0; *pos && ix != GOMP_DIM_MAX; ix++) | |
610 | { | |
611 | if (ix) | |
612 | { | |
613 | if (*pos != ':') | |
614 | goto malformed; | |
615 | pos++; | |
616 | } | |
617 | ||
618 | if (*pos != ':') | |
619 | { | |
620 | long val; | |
621 | const char *eptr; | |
622 | ||
623 | errno = 0; | |
624 | val = strtol (pos, CONST_CAST (char **, &eptr), 10); | |
625 | if (errno || val <= 0 || (int) val != val) | |
626 | goto malformed; | |
627 | pos = eptr; | |
628 | oacc_default_dims[ix] = (int) val; | |
629 | } | |
630 | } | |
631 | if (*pos) | |
632 | { | |
633 | malformed: | |
634 | error_at (UNKNOWN_LOCATION, | |
635 | "-fopenacc-dim operand is malformed at '%s'", pos); | |
636 | } | |
637 | } | |
638 | ||
639 | /* Allow the backend to validate the dimensions. */ | |
640 | targetm.goacc.validate_dims (NULL_TREE, oacc_default_dims, -1); | |
641 | targetm.goacc.validate_dims (NULL_TREE, oacc_min_dims, -2); | |
642 | } | |
643 | ||
644 | /* Validate and update the dimensions for offloaded FN. ATTRS is the | |
645 | raw attribute. DIMS is an array of dimensions, which is filled in. | |
646 | LEVEL is the partitioning level of a routine, or -1 for an offload | |
01914336 | 647 | region itself. USED is the mask of partitioned execution in the |
629b3d75 MJ |
648 | function. */ |
649 | ||
650 | static void | |
651 | oacc_validate_dims (tree fn, tree attrs, int *dims, int level, unsigned used) | |
652 | { | |
653 | tree purpose[GOMP_DIM_MAX]; | |
654 | unsigned ix; | |
655 | tree pos = TREE_VALUE (attrs); | |
629b3d75 MJ |
656 | |
657 | /* Make sure the attribute creator attached the dimension | |
658 | information. */ | |
659 | gcc_assert (pos); | |
660 | ||
661 | for (ix = 0; ix != GOMP_DIM_MAX; ix++) | |
662 | { | |
663 | purpose[ix] = TREE_PURPOSE (pos); | |
664 | tree val = TREE_VALUE (pos); | |
665 | dims[ix] = val ? TREE_INT_CST_LOW (val) : -1; | |
666 | pos = TREE_CHAIN (pos); | |
667 | } | |
668 | ||
669 | bool changed = targetm.goacc.validate_dims (fn, dims, level); | |
670 | ||
671 | /* Default anything left to 1 or a partitioned default. */ | |
672 | for (ix = 0; ix != GOMP_DIM_MAX; ix++) | |
673 | if (dims[ix] < 0) | |
674 | { | |
675 | /* The OpenACC spec says 'If the [num_gangs] clause is not | |
676 | specified, an implementation-defined default will be used; | |
677 | the default may depend on the code within the construct.' | |
678 | (2.5.6). Thus an implementation is free to choose | |
679 | non-unity default for a parallel region that doesn't have | |
680 | any gang-partitioned loops. However, it appears that there | |
681 | is a sufficient body of user code that expects non-gang | |
682 | partitioned regions to not execute in gang-redundant mode. | |
683 | So we (a) don't warn about the non-portability and (b) pick | |
684 | the minimum permissible dimension size when there is no | |
685 | partitioned execution. Otherwise we pick the global | |
686 | default for the dimension, which the user can control. The | |
687 | same wording and logic applies to num_workers and | |
688 | vector_length, however the worker- or vector- single | |
689 | execution doesn't have the same impact as gang-redundant | |
690 | execution. (If the minimum gang-level partioning is not 1, | |
691 | the target is probably too confusing.) */ | |
692 | dims[ix] = (used & GOMP_DIM_MASK (ix) | |
693 | ? oacc_default_dims[ix] : oacc_min_dims[ix]); | |
694 | changed = true; | |
695 | } | |
696 | ||
697 | if (changed) | |
698 | { | |
699 | /* Replace the attribute with new values. */ | |
700 | pos = NULL_TREE; | |
701 | for (ix = GOMP_DIM_MAX; ix--;) | |
25651634 TS |
702 | pos = tree_cons (purpose[ix], |
703 | build_int_cst (integer_type_node, dims[ix]), pos); | |
629b3d75 MJ |
704 | oacc_replace_fn_attrib (fn, pos); |
705 | } | |
706 | } | |
707 | ||
708 | /* Create an empty OpenACC loop structure at LOC. */ | |
709 | ||
710 | static oacc_loop * | |
711 | new_oacc_loop_raw (oacc_loop *parent, location_t loc) | |
712 | { | |
713 | oacc_loop *loop = XCNEW (oacc_loop); | |
714 | ||
715 | loop->parent = parent; | |
629b3d75 MJ |
716 | |
717 | if (parent) | |
718 | { | |
719 | loop->sibling = parent->child; | |
720 | parent->child = loop; | |
721 | } | |
722 | ||
723 | loop->loc = loc; | |
629b3d75 MJ |
724 | return loop; |
725 | } | |
726 | ||
727 | /* Create an outermost, dummy OpenACC loop for offloaded function | |
728 | DECL. */ | |
729 | ||
730 | static oacc_loop * | |
731 | new_oacc_loop_outer (tree decl) | |
732 | { | |
733 | return new_oacc_loop_raw (NULL, DECL_SOURCE_LOCATION (decl)); | |
734 | } | |
735 | ||
736 | /* Start a new OpenACC loop structure beginning at head marker HEAD. | |
737 | Link into PARENT loop. Return the new loop. */ | |
738 | ||
739 | static oacc_loop * | |
740 | new_oacc_loop (oacc_loop *parent, gcall *marker) | |
741 | { | |
742 | oacc_loop *loop = new_oacc_loop_raw (parent, gimple_location (marker)); | |
743 | ||
744 | loop->marker = marker; | |
745 | ||
746 | /* TODO: This is where device_type flattening would occur for the loop | |
01914336 | 747 | flags. */ |
629b3d75 MJ |
748 | |
749 | loop->flags = TREE_INT_CST_LOW (gimple_call_arg (marker, 3)); | |
750 | ||
751 | tree chunk_size = integer_zero_node; | |
752 | if (loop->flags & OLF_GANG_STATIC) | |
753 | chunk_size = gimple_call_arg (marker, 4); | |
754 | loop->chunk_size = chunk_size; | |
755 | ||
756 | return loop; | |
757 | } | |
758 | ||
759 | /* Create a dummy loop encompassing a call to a openACC routine. | |
760 | Extract the routine's partitioning requirements. */ | |
761 | ||
762 | static void | |
763 | new_oacc_loop_routine (oacc_loop *parent, gcall *call, tree decl, tree attrs) | |
764 | { | |
765 | oacc_loop *loop = new_oacc_loop_raw (parent, gimple_location (call)); | |
766 | int level = oacc_fn_attrib_level (attrs); | |
767 | ||
768 | gcc_assert (level >= 0); | |
769 | ||
770 | loop->marker = call; | |
771 | loop->routine = decl; | |
772 | loop->mask = ((GOMP_DIM_MASK (GOMP_DIM_MAX) - 1) | |
773 | ^ (GOMP_DIM_MASK (level) - 1)); | |
774 | } | |
775 | ||
776 | /* Finish off the current OpenACC loop ending at tail marker TAIL. | |
777 | Return the parent loop. */ | |
778 | ||
779 | static oacc_loop * | |
780 | finish_oacc_loop (oacc_loop *loop) | |
781 | { | |
782 | /* If the loop has been collapsed, don't partition it. */ | |
02889d23 | 783 | if (loop->ifns.is_empty ()) |
629b3d75 MJ |
784 | loop->mask = loop->flags = 0; |
785 | return loop->parent; | |
786 | } | |
787 | ||
788 | /* Free all OpenACC loop structures within LOOP (inclusive). */ | |
789 | ||
790 | static void | |
791 | free_oacc_loop (oacc_loop *loop) | |
792 | { | |
793 | if (loop->sibling) | |
794 | free_oacc_loop (loop->sibling); | |
795 | if (loop->child) | |
796 | free_oacc_loop (loop->child); | |
797 | ||
622f6b64 | 798 | loop->ifns.release (); |
629b3d75 MJ |
799 | free (loop); |
800 | } | |
801 | ||
802 | /* Dump out the OpenACC loop head or tail beginning at FROM. */ | |
803 | ||
804 | static void | |
805 | dump_oacc_loop_part (FILE *file, gcall *from, int depth, | |
806 | const char *title, int level) | |
807 | { | |
808 | enum ifn_unique_kind kind | |
809 | = (enum ifn_unique_kind) TREE_INT_CST_LOW (gimple_call_arg (from, 0)); | |
810 | ||
811 | fprintf (file, "%*s%s-%d:\n", depth * 2, "", title, level); | |
812 | for (gimple_stmt_iterator gsi = gsi_for_stmt (from);;) | |
813 | { | |
814 | gimple *stmt = gsi_stmt (gsi); | |
815 | ||
816 | if (gimple_call_internal_p (stmt, IFN_UNIQUE)) | |
817 | { | |
818 | enum ifn_unique_kind k | |
819 | = ((enum ifn_unique_kind) TREE_INT_CST_LOW | |
820 | (gimple_call_arg (stmt, 0))); | |
821 | ||
822 | if (k == kind && stmt != from) | |
823 | break; | |
824 | } | |
ef6cb4c7 | 825 | print_gimple_stmt (file, stmt, depth * 2 + 2); |
629b3d75 MJ |
826 | |
827 | gsi_next (&gsi); | |
828 | while (gsi_end_p (gsi)) | |
829 | gsi = gsi_start_bb (single_succ (gsi_bb (gsi))); | |
830 | } | |
831 | } | |
832 | ||
5d390fd3 | 833 | /* Dump OpenACC loop LOOP, its children, and its siblings. */ |
629b3d75 MJ |
834 | |
835 | static void | |
836 | dump_oacc_loop (FILE *file, oacc_loop *loop, int depth) | |
837 | { | |
838 | int ix; | |
839 | ||
840 | fprintf (file, "%*sLoop %x(%x) %s:%u\n", depth * 2, "", | |
841 | loop->flags, loop->mask, | |
842 | LOCATION_FILE (loop->loc), LOCATION_LINE (loop->loc)); | |
843 | ||
844 | if (loop->marker) | |
ef6cb4c7 | 845 | print_gimple_stmt (file, loop->marker, depth * 2); |
629b3d75 MJ |
846 | |
847 | if (loop->routine) | |
848 | fprintf (file, "%*sRoutine %s:%u:%s\n", | |
849 | depth * 2, "", DECL_SOURCE_FILE (loop->routine), | |
850 | DECL_SOURCE_LINE (loop->routine), | |
851 | IDENTIFIER_POINTER (DECL_NAME (loop->routine))); | |
852 | ||
853 | for (ix = GOMP_DIM_GANG; ix != GOMP_DIM_MAX; ix++) | |
854 | if (loop->heads[ix]) | |
855 | dump_oacc_loop_part (file, loop->heads[ix], depth, "Head", ix); | |
856 | for (ix = GOMP_DIM_MAX; ix--;) | |
857 | if (loop->tails[ix]) | |
858 | dump_oacc_loop_part (file, loop->tails[ix], depth, "Tail", ix); | |
859 | ||
860 | if (loop->child) | |
861 | dump_oacc_loop (file, loop->child, depth + 1); | |
862 | if (loop->sibling) | |
863 | dump_oacc_loop (file, loop->sibling, depth); | |
864 | } | |
865 | ||
866 | void debug_oacc_loop (oacc_loop *); | |
867 | ||
868 | /* Dump loops to stderr. */ | |
869 | ||
870 | DEBUG_FUNCTION void | |
871 | debug_oacc_loop (oacc_loop *loop) | |
872 | { | |
873 | dump_oacc_loop (stderr, loop, 0); | |
874 | } | |
875 | ||
5d390fd3 TS |
876 | /* Provide diagnostics on OpenACC loop LOOP, its children, and its |
877 | siblings. */ | |
878 | ||
879 | static void | |
880 | inform_oacc_loop (const oacc_loop *loop) | |
881 | { | |
882 | const char *gang | |
883 | = loop->mask & GOMP_DIM_MASK (GOMP_DIM_GANG) ? " gang" : ""; | |
884 | const char *worker | |
885 | = loop->mask & GOMP_DIM_MASK (GOMP_DIM_WORKER) ? " worker" : ""; | |
886 | const char *vector | |
887 | = loop->mask & GOMP_DIM_MASK (GOMP_DIM_VECTOR) ? " vector" : ""; | |
888 | const char *seq = loop->mask == 0 ? " seq" : ""; | |
889 | const dump_user_location_t loc | |
890 | = dump_user_location_t::from_location_t (loop->loc); | |
891 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, loc, | |
892 | "assigned OpenACC%s%s%s%s loop parallelism\n", gang, worker, | |
893 | vector, seq); | |
894 | ||
895 | if (loop->child) | |
896 | inform_oacc_loop (loop->child); | |
897 | if (loop->sibling) | |
898 | inform_oacc_loop (loop->sibling); | |
899 | } | |
900 | ||
629b3d75 MJ |
901 | /* DFS walk of basic blocks BB onwards, creating OpenACC loop |
902 | structures as we go. By construction these loops are properly | |
903 | nested. */ | |
904 | ||
905 | static void | |
906 | oacc_loop_discover_walk (oacc_loop *loop, basic_block bb) | |
907 | { | |
908 | int marker = 0; | |
909 | int remaining = 0; | |
910 | ||
911 | if (bb->flags & BB_VISITED) | |
912 | return; | |
913 | ||
914 | follow: | |
915 | bb->flags |= BB_VISITED; | |
916 | ||
917 | /* Scan for loop markers. */ | |
918 | for (gimple_stmt_iterator gsi = gsi_start_bb (bb); !gsi_end_p (gsi); | |
919 | gsi_next (&gsi)) | |
920 | { | |
921 | gimple *stmt = gsi_stmt (gsi); | |
922 | ||
923 | if (!is_gimple_call (stmt)) | |
924 | continue; | |
925 | ||
926 | gcall *call = as_a <gcall *> (stmt); | |
927 | ||
928 | /* If this is a routine, make a dummy loop for it. */ | |
929 | if (tree decl = gimple_call_fndecl (call)) | |
930 | if (tree attrs = oacc_get_fn_attrib (decl)) | |
931 | { | |
932 | gcc_assert (!marker); | |
933 | new_oacc_loop_routine (loop, call, decl, attrs); | |
934 | } | |
935 | ||
936 | if (!gimple_call_internal_p (call)) | |
937 | continue; | |
938 | ||
939 | switch (gimple_call_internal_fn (call)) | |
940 | { | |
941 | default: | |
942 | break; | |
943 | ||
944 | case IFN_GOACC_LOOP: | |
02889d23 CLT |
945 | case IFN_GOACC_TILE: |
946 | /* Record the abstraction function, so we can manipulate it | |
947 | later. */ | |
948 | loop->ifns.safe_push (call); | |
629b3d75 MJ |
949 | break; |
950 | ||
951 | case IFN_UNIQUE: | |
952 | enum ifn_unique_kind kind | |
953 | = (enum ifn_unique_kind) (TREE_INT_CST_LOW | |
954 | (gimple_call_arg (call, 0))); | |
955 | if (kind == IFN_UNIQUE_OACC_HEAD_MARK | |
956 | || kind == IFN_UNIQUE_OACC_TAIL_MARK) | |
957 | { | |
958 | if (gimple_call_num_args (call) == 2) | |
959 | { | |
960 | gcc_assert (marker && !remaining); | |
961 | marker = 0; | |
962 | if (kind == IFN_UNIQUE_OACC_TAIL_MARK) | |
963 | loop = finish_oacc_loop (loop); | |
964 | else | |
965 | loop->head_end = call; | |
966 | } | |
967 | else | |
968 | { | |
969 | int count = TREE_INT_CST_LOW (gimple_call_arg (call, 2)); | |
970 | ||
971 | if (!marker) | |
972 | { | |
973 | if (kind == IFN_UNIQUE_OACC_HEAD_MARK) | |
974 | loop = new_oacc_loop (loop, call); | |
975 | remaining = count; | |
976 | } | |
977 | gcc_assert (count == remaining); | |
978 | if (remaining) | |
979 | { | |
980 | remaining--; | |
981 | if (kind == IFN_UNIQUE_OACC_HEAD_MARK) | |
982 | loop->heads[marker] = call; | |
983 | else | |
984 | loop->tails[remaining] = call; | |
985 | } | |
986 | marker++; | |
987 | } | |
988 | } | |
989 | } | |
990 | } | |
991 | if (remaining || marker) | |
992 | { | |
993 | bb = single_succ (bb); | |
994 | gcc_assert (single_pred_p (bb) && !(bb->flags & BB_VISITED)); | |
995 | goto follow; | |
996 | } | |
997 | ||
998 | /* Walk successor blocks. */ | |
999 | edge e; | |
1000 | edge_iterator ei; | |
1001 | ||
1002 | FOR_EACH_EDGE (e, ei, bb->succs) | |
1003 | oacc_loop_discover_walk (loop, e->dest); | |
1004 | } | |
1005 | ||
1006 | /* LOOP is the first sibling. Reverse the order in place and return | |
1007 | the new first sibling. Recurse to child loops. */ | |
1008 | ||
1009 | static oacc_loop * | |
1010 | oacc_loop_sibling_nreverse (oacc_loop *loop) | |
1011 | { | |
1012 | oacc_loop *last = NULL; | |
1013 | do | |
1014 | { | |
1015 | if (loop->child) | |
01914336 | 1016 | loop->child = oacc_loop_sibling_nreverse (loop->child); |
629b3d75 MJ |
1017 | |
1018 | oacc_loop *next = loop->sibling; | |
1019 | loop->sibling = last; | |
1020 | last = loop; | |
1021 | loop = next; | |
1022 | } | |
1023 | while (loop); | |
1024 | ||
1025 | return last; | |
1026 | } | |
1027 | ||
1028 | /* Discover the OpenACC loops marked up by HEAD and TAIL markers for | |
1029 | the current function. */ | |
1030 | ||
1031 | static oacc_loop * | |
1032 | oacc_loop_discovery () | |
1033 | { | |
1034 | /* Clear basic block flags, in particular BB_VISITED which we're going to use | |
1035 | in the following. */ | |
1036 | clear_bb_flags (); | |
1037 | ||
1038 | oacc_loop *top = new_oacc_loop_outer (current_function_decl); | |
1039 | oacc_loop_discover_walk (top, ENTRY_BLOCK_PTR_FOR_FN (cfun)); | |
1040 | ||
1041 | /* The siblings were constructed in reverse order, reverse them so | |
1042 | that diagnostics come out in an unsurprising order. */ | |
1043 | top = oacc_loop_sibling_nreverse (top); | |
1044 | ||
1045 | return top; | |
1046 | } | |
1047 | ||
1048 | /* Transform the abstract internal function markers starting at FROM | |
1049 | to be for partitioning level LEVEL. Stop when we meet another HEAD | |
1050 | or TAIL marker. */ | |
1051 | ||
1052 | static void | |
1053 | oacc_loop_xform_head_tail (gcall *from, int level) | |
1054 | { | |
1055 | enum ifn_unique_kind kind | |
1056 | = (enum ifn_unique_kind) TREE_INT_CST_LOW (gimple_call_arg (from, 0)); | |
1057 | tree replacement = build_int_cst (unsigned_type_node, level); | |
1058 | ||
1059 | for (gimple_stmt_iterator gsi = gsi_for_stmt (from);;) | |
1060 | { | |
1061 | gimple *stmt = gsi_stmt (gsi); | |
1062 | ||
1063 | if (gimple_call_internal_p (stmt, IFN_UNIQUE)) | |
1064 | { | |
1065 | enum ifn_unique_kind k | |
1066 | = ((enum ifn_unique_kind) | |
1067 | TREE_INT_CST_LOW (gimple_call_arg (stmt, 0))); | |
1068 | ||
1069 | if (k == IFN_UNIQUE_OACC_FORK || k == IFN_UNIQUE_OACC_JOIN) | |
1070 | *gimple_call_arg_ptr (stmt, 2) = replacement; | |
1071 | else if (k == kind && stmt != from) | |
1072 | break; | |
1073 | } | |
1074 | else if (gimple_call_internal_p (stmt, IFN_GOACC_REDUCTION)) | |
1075 | *gimple_call_arg_ptr (stmt, 3) = replacement; | |
1076 | ||
1077 | gsi_next (&gsi); | |
1078 | while (gsi_end_p (gsi)) | |
1079 | gsi = gsi_start_bb (single_succ (gsi_bb (gsi))); | |
1080 | } | |
1081 | } | |
1082 | ||
629b3d75 MJ |
1083 | /* Process the discovered OpenACC loops, setting the correct |
1084 | partitioning level etc. */ | |
1085 | ||
1086 | static void | |
1087 | oacc_loop_process (oacc_loop *loop) | |
1088 | { | |
1089 | if (loop->child) | |
1090 | oacc_loop_process (loop->child); | |
1091 | ||
1092 | if (loop->mask && !loop->routine) | |
1093 | { | |
1094 | int ix; | |
02889d23 CLT |
1095 | tree mask_arg = build_int_cst (unsigned_type_node, loop->mask); |
1096 | tree e_mask_arg = build_int_cst (unsigned_type_node, loop->e_mask); | |
629b3d75 | 1097 | tree chunk_arg = loop->chunk_size; |
02889d23 CLT |
1098 | gcall *call; |
1099 | ||
1100 | for (ix = 0; loop->ifns.iterate (ix, &call); ix++) | |
1101 | switch (gimple_call_internal_fn (call)) | |
1102 | { | |
1103 | case IFN_GOACC_LOOP: | |
1104 | { | |
1105 | bool is_e = gimple_call_arg (call, 5) == integer_minus_one_node; | |
1106 | gimple_call_set_arg (call, 5, is_e ? e_mask_arg : mask_arg); | |
1107 | if (!is_e) | |
1108 | gimple_call_set_arg (call, 4, chunk_arg); | |
1109 | } | |
1110 | break; | |
1111 | ||
1112 | case IFN_GOACC_TILE: | |
1113 | gimple_call_set_arg (call, 3, mask_arg); | |
1114 | gimple_call_set_arg (call, 4, e_mask_arg); | |
1115 | break; | |
629b3d75 | 1116 | |
02889d23 CLT |
1117 | default: |
1118 | gcc_unreachable (); | |
1119 | } | |
629b3d75 | 1120 | |
02889d23 CLT |
1121 | unsigned dim = GOMP_DIM_GANG; |
1122 | unsigned mask = loop->mask | loop->e_mask; | |
629b3d75 MJ |
1123 | for (ix = 0; ix != GOMP_DIM_MAX && mask; ix++) |
1124 | { | |
1125 | while (!(GOMP_DIM_MASK (dim) & mask)) | |
1126 | dim++; | |
1127 | ||
1128 | oacc_loop_xform_head_tail (loop->heads[ix], dim); | |
1129 | oacc_loop_xform_head_tail (loop->tails[ix], dim); | |
1130 | ||
1131 | mask ^= GOMP_DIM_MASK (dim); | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | if (loop->sibling) | |
1136 | oacc_loop_process (loop->sibling); | |
1137 | } | |
1138 | ||
1139 | /* Walk the OpenACC loop heirarchy checking and assigning the | |
1140 | programmer-specified partitionings. OUTER_MASK is the partitioning | |
1141 | this loop is contained within. Return mask of partitioning | |
1142 | encountered. If any auto loops are discovered, set GOMP_DIM_MAX | |
1143 | bit. */ | |
1144 | ||
1145 | static unsigned | |
1146 | oacc_loop_fixed_partitions (oacc_loop *loop, unsigned outer_mask) | |
1147 | { | |
1148 | unsigned this_mask = loop->mask; | |
1149 | unsigned mask_all = 0; | |
1150 | bool noisy = true; | |
1151 | ||
1152 | #ifdef ACCEL_COMPILER | |
1153 | /* When device_type is supported, we want the device compiler to be | |
1154 | noisy, if the loop parameters are device_type-specific. */ | |
1155 | noisy = false; | |
1156 | #endif | |
1157 | ||
1158 | if (!loop->routine) | |
1159 | { | |
1160 | bool auto_par = (loop->flags & OLF_AUTO) != 0; | |
1161 | bool seq_par = (loop->flags & OLF_SEQ) != 0; | |
02889d23 CLT |
1162 | bool tiling = (loop->flags & OLF_TILE) != 0; |
1163 | ||
629b3d75 MJ |
1164 | this_mask = ((loop->flags >> OLF_DIM_BASE) |
1165 | & (GOMP_DIM_MASK (GOMP_DIM_MAX) - 1)); | |
1166 | ||
02889d23 CLT |
1167 | /* Apply auto partitioning if this is a non-partitioned regular |
1168 | loop, or (no more than) single axis tiled loop. */ | |
1169 | bool maybe_auto | |
1170 | = !seq_par && this_mask == (tiling ? this_mask & -this_mask : 0); | |
1171 | ||
629b3d75 MJ |
1172 | if ((this_mask != 0) + auto_par + seq_par > 1) |
1173 | { | |
1174 | if (noisy) | |
1175 | error_at (loop->loc, | |
1176 | seq_par | |
324ff1a0 JJ |
1177 | ? G_("%<seq%> overrides other OpenACC loop specifiers") |
1178 | : G_("%<auto%> conflicts with other OpenACC loop " | |
1179 | "specifiers")); | |
02889d23 | 1180 | maybe_auto = false; |
629b3d75 MJ |
1181 | loop->flags &= ~OLF_AUTO; |
1182 | if (seq_par) | |
1183 | { | |
01914336 MJ |
1184 | loop->flags |
1185 | &= ~((GOMP_DIM_MASK (GOMP_DIM_MAX) - 1) << OLF_DIM_BASE); | |
629b3d75 MJ |
1186 | this_mask = 0; |
1187 | } | |
1188 | } | |
02889d23 CLT |
1189 | |
1190 | if (maybe_auto && (loop->flags & OLF_INDEPENDENT)) | |
1191 | { | |
1192 | loop->flags |= OLF_AUTO; | |
1193 | mask_all |= GOMP_DIM_MASK (GOMP_DIM_MAX); | |
1194 | } | |
629b3d75 MJ |
1195 | } |
1196 | ||
1197 | if (this_mask & outer_mask) | |
1198 | { | |
1199 | const oacc_loop *outer; | |
1200 | for (outer = loop->parent; outer; outer = outer->parent) | |
02889d23 | 1201 | if ((outer->mask | outer->e_mask) & this_mask) |
629b3d75 MJ |
1202 | break; |
1203 | ||
1204 | if (noisy) | |
1205 | { | |
1206 | if (outer) | |
1207 | { | |
1208 | error_at (loop->loc, | |
efebb49e DM |
1209 | loop->routine |
1210 | ? G_("routine call uses same OpenACC parallelism" | |
1211 | " as containing loop") | |
1212 | : G_("inner loop uses same OpenACC parallelism" | |
1213 | " as containing loop")); | |
629b3d75 MJ |
1214 | inform (outer->loc, "containing loop here"); |
1215 | } | |
1216 | else | |
1217 | error_at (loop->loc, | |
efebb49e DM |
1218 | loop->routine |
1219 | ? G_("routine call uses OpenACC parallelism disallowed" | |
1220 | " by containing routine") | |
1221 | : G_("loop uses OpenACC parallelism disallowed" | |
1222 | " by containing routine")); | |
629b3d75 MJ |
1223 | |
1224 | if (loop->routine) | |
1225 | inform (DECL_SOURCE_LOCATION (loop->routine), | |
1226 | "routine %qD declared here", loop->routine); | |
1227 | } | |
1228 | this_mask &= ~outer_mask; | |
1229 | } | |
1230 | else | |
1231 | { | |
1232 | unsigned outermost = least_bit_hwi (this_mask); | |
1233 | ||
1234 | if (outermost && outermost <= outer_mask) | |
1235 | { | |
1236 | if (noisy) | |
1237 | { | |
1238 | error_at (loop->loc, | |
1239 | "incorrectly nested OpenACC loop parallelism"); | |
1240 | ||
1241 | const oacc_loop *outer; | |
1242 | for (outer = loop->parent; | |
1243 | outer->flags && outer->flags < outermost; | |
1244 | outer = outer->parent) | |
1245 | continue; | |
1246 | inform (outer->loc, "containing loop here"); | |
1247 | } | |
1248 | ||
1249 | this_mask &= ~outermost; | |
1250 | } | |
1251 | } | |
1252 | ||
629b3d75 MJ |
1253 | mask_all |= this_mask; |
1254 | ||
02889d23 CLT |
1255 | if (loop->flags & OLF_TILE) |
1256 | { | |
1257 | /* When tiling, vector goes to the element loop, and failing | |
1258 | that we put worker there. The std doesn't contemplate | |
1259 | specifying all three. We choose to put worker and vector on | |
1260 | the element loops in that case. */ | |
1261 | unsigned this_e_mask = this_mask & GOMP_DIM_MASK (GOMP_DIM_VECTOR); | |
1262 | if (!this_e_mask || this_mask & GOMP_DIM_MASK (GOMP_DIM_GANG)) | |
1263 | this_e_mask |= this_mask & GOMP_DIM_MASK (GOMP_DIM_WORKER); | |
1264 | ||
1265 | loop->e_mask = this_e_mask; | |
1266 | this_mask ^= this_e_mask; | |
1267 | } | |
1268 | ||
1269 | loop->mask = this_mask; | |
1270 | ||
1271 | if (dump_file) | |
1272 | fprintf (dump_file, "Loop %s:%d user specified %d & %d\n", | |
1273 | LOCATION_FILE (loop->loc), LOCATION_LINE (loop->loc), | |
1274 | loop->mask, loop->e_mask); | |
1275 | ||
629b3d75 MJ |
1276 | if (loop->child) |
1277 | { | |
02889d23 CLT |
1278 | unsigned tmp_mask = outer_mask | this_mask | loop->e_mask; |
1279 | loop->inner = oacc_loop_fixed_partitions (loop->child, tmp_mask); | |
629b3d75 MJ |
1280 | mask_all |= loop->inner; |
1281 | } | |
1282 | ||
1283 | if (loop->sibling) | |
1284 | mask_all |= oacc_loop_fixed_partitions (loop->sibling, outer_mask); | |
1285 | ||
1286 | return mask_all; | |
1287 | } | |
1288 | ||
1289 | /* Walk the OpenACC loop heirarchy to assign auto-partitioned loops. | |
1290 | OUTER_MASK is the partitioning this loop is contained within. | |
02889d23 | 1291 | OUTER_ASSIGN is true if an outer loop is being auto-partitioned. |
629b3d75 MJ |
1292 | Return the cumulative partitioning used by this loop, siblings and |
1293 | children. */ | |
1294 | ||
1295 | static unsigned | |
02889d23 CLT |
1296 | oacc_loop_auto_partitions (oacc_loop *loop, unsigned outer_mask, |
1297 | bool outer_assign) | |
629b3d75 MJ |
1298 | { |
1299 | bool assign = (loop->flags & OLF_AUTO) && (loop->flags & OLF_INDEPENDENT); | |
1300 | bool noisy = true; | |
02889d23 | 1301 | bool tiling = loop->flags & OLF_TILE; |
629b3d75 MJ |
1302 | |
1303 | #ifdef ACCEL_COMPILER | |
1304 | /* When device_type is supported, we want the device compiler to be | |
1305 | noisy, if the loop parameters are device_type-specific. */ | |
1306 | noisy = false; | |
1307 | #endif | |
1308 | ||
891ba5eb | 1309 | if (assign && (!outer_assign || loop->inner)) |
629b3d75 | 1310 | { |
02889d23 CLT |
1311 | /* Allocate outermost and non-innermost loops at the outermost |
1312 | non-innermost available level. */ | |
1313 | unsigned this_mask = GOMP_DIM_MASK (GOMP_DIM_GANG); | |
1314 | ||
1315 | /* Find the first outermost available partition. */ | |
1316 | while (this_mask <= outer_mask) | |
1317 | this_mask <<= 1; | |
1318 | ||
1319 | /* Grab two axes if tiling, and we've not assigned anything */ | |
1320 | if (tiling && !(loop->mask | loop->e_mask)) | |
1321 | this_mask |= this_mask << 1; | |
1322 | ||
1323 | /* Prohibit the innermost partitioning at the moment. */ | |
1324 | this_mask &= GOMP_DIM_MASK (GOMP_DIM_MAX - 1) - 1; | |
629b3d75 | 1325 | |
02889d23 CLT |
1326 | /* Don't use any dimension explicitly claimed by an inner loop. */ |
1327 | this_mask &= ~loop->inner; | |
1328 | ||
1329 | if (tiling && !loop->e_mask) | |
1330 | { | |
1331 | /* If we got two axes, allocate the inner one to the element | |
1332 | loop. */ | |
1333 | loop->e_mask = this_mask & (this_mask << 1); | |
1334 | this_mask ^= loop->e_mask; | |
1335 | } | |
1336 | ||
1337 | loop->mask |= this_mask; | |
629b3d75 MJ |
1338 | } |
1339 | ||
1340 | if (loop->child) | |
1341 | { | |
02889d23 CLT |
1342 | unsigned tmp_mask = outer_mask | loop->mask | loop->e_mask; |
1343 | loop->inner = oacc_loop_auto_partitions (loop->child, tmp_mask, | |
1344 | outer_assign | assign); | |
629b3d75 MJ |
1345 | } |
1346 | ||
02889d23 | 1347 | if (assign && (!loop->mask || (tiling && !loop->e_mask) || !outer_assign)) |
629b3d75 | 1348 | { |
02889d23 CLT |
1349 | /* Allocate the loop at the innermost available level. Note |
1350 | that we do this even if we already assigned this loop the | |
1351 | outermost available level above. That way we'll partition | |
1352 | this along 2 axes, if they are available. */ | |
629b3d75 MJ |
1353 | unsigned this_mask = 0; |
1354 | ||
01914336 | 1355 | /* Determine the outermost partitioning used within this loop. */ |
629b3d75 MJ |
1356 | this_mask = loop->inner | GOMP_DIM_MASK (GOMP_DIM_MAX); |
1357 | this_mask = least_bit_hwi (this_mask); | |
1358 | ||
1359 | /* Pick the partitioning just inside that one. */ | |
1360 | this_mask >>= 1; | |
1361 | ||
01914336 | 1362 | /* And avoid picking one use by an outer loop. */ |
629b3d75 MJ |
1363 | this_mask &= ~outer_mask; |
1364 | ||
02889d23 CLT |
1365 | /* If tiling and we failed completely above, grab the next one |
1366 | too. Making sure it doesn't hit an outer loop. */ | |
1367 | if (tiling) | |
1368 | { | |
1369 | this_mask &= ~(loop->e_mask | loop->mask); | |
1370 | unsigned tile_mask = ((this_mask >> 1) | |
1371 | & ~(outer_mask | loop->e_mask | loop->mask)); | |
1372 | ||
1373 | if (tile_mask || loop->mask) | |
1374 | { | |
1375 | loop->e_mask |= this_mask; | |
1376 | this_mask = tile_mask; | |
1377 | } | |
1378 | if (!loop->e_mask && noisy) | |
1379 | warning_at (loop->loc, 0, | |
1380 | "insufficient partitioning available" | |
1381 | " to parallelize element loop"); | |
1382 | } | |
629b3d75 | 1383 | |
02889d23 CLT |
1384 | loop->mask |= this_mask; |
1385 | if (!loop->mask && noisy) | |
1386 | warning_at (loop->loc, 0, | |
efebb49e DM |
1387 | tiling |
1388 | ? G_("insufficient partitioning available" | |
1389 | " to parallelize tile loop") | |
1390 | : G_("insufficient partitioning available" | |
1391 | " to parallelize loop")); | |
629b3d75 MJ |
1392 | } |
1393 | ||
1394 | if (assign && dump_file) | |
02889d23 | 1395 | fprintf (dump_file, "Auto loop %s:%d assigned %d & %d\n", |
629b3d75 | 1396 | LOCATION_FILE (loop->loc), LOCATION_LINE (loop->loc), |
02889d23 | 1397 | loop->mask, loop->e_mask); |
629b3d75 MJ |
1398 | |
1399 | unsigned inner_mask = 0; | |
1400 | ||
1401 | if (loop->sibling) | |
02889d23 CLT |
1402 | inner_mask |= oacc_loop_auto_partitions (loop->sibling, |
1403 | outer_mask, outer_assign); | |
629b3d75 | 1404 | |
02889d23 | 1405 | inner_mask |= loop->inner | loop->mask | loop->e_mask; |
629b3d75 MJ |
1406 | |
1407 | return inner_mask; | |
1408 | } | |
1409 | ||
1410 | /* Walk the OpenACC loop heirarchy to check and assign partitioning | |
1411 | axes. Return mask of partitioning. */ | |
1412 | ||
1413 | static unsigned | |
1414 | oacc_loop_partition (oacc_loop *loop, unsigned outer_mask) | |
1415 | { | |
1416 | unsigned mask_all = oacc_loop_fixed_partitions (loop, outer_mask); | |
1417 | ||
1418 | if (mask_all & GOMP_DIM_MASK (GOMP_DIM_MAX)) | |
1419 | { | |
1420 | mask_all ^= GOMP_DIM_MASK (GOMP_DIM_MAX); | |
02889d23 | 1421 | mask_all |= oacc_loop_auto_partitions (loop, outer_mask, false); |
629b3d75 MJ |
1422 | } |
1423 | return mask_all; | |
1424 | } | |
1425 | ||
1426 | /* Default fork/join early expander. Delete the function calls if | |
1427 | there is no RTL expander. */ | |
1428 | ||
1429 | bool | |
1430 | default_goacc_fork_join (gcall *ARG_UNUSED (call), | |
1431 | const int *ARG_UNUSED (dims), bool is_fork) | |
1432 | { | |
1433 | if (is_fork) | |
1434 | return targetm.have_oacc_fork (); | |
1435 | else | |
1436 | return targetm.have_oacc_join (); | |
1437 | } | |
1438 | ||
1439 | /* Default goacc.reduction early expander. | |
1440 | ||
1441 | LHS-opt = IFN_REDUCTION (KIND, RES_PTR, VAR, LEVEL, OP, OFFSET) | |
1442 | If RES_PTR is not integer-zerop: | |
1443 | SETUP - emit 'LHS = *RES_PTR', LHS = NULL | |
1444 | TEARDOWN - emit '*RES_PTR = VAR' | |
1445 | If LHS is not NULL | |
1446 | emit 'LHS = VAR' */ | |
1447 | ||
1448 | void | |
1449 | default_goacc_reduction (gcall *call) | |
1450 | { | |
1451 | unsigned code = (unsigned)TREE_INT_CST_LOW (gimple_call_arg (call, 0)); | |
1452 | gimple_stmt_iterator gsi = gsi_for_stmt (call); | |
1453 | tree lhs = gimple_call_lhs (call); | |
1454 | tree var = gimple_call_arg (call, 2); | |
1455 | gimple_seq seq = NULL; | |
1456 | ||
1457 | if (code == IFN_GOACC_REDUCTION_SETUP | |
1458 | || code == IFN_GOACC_REDUCTION_TEARDOWN) | |
1459 | { | |
1460 | /* Setup and Teardown need to copy from/to the receiver object, | |
1461 | if there is one. */ | |
1462 | tree ref_to_res = gimple_call_arg (call, 1); | |
1463 | ||
1464 | if (!integer_zerop (ref_to_res)) | |
1465 | { | |
1466 | tree dst = build_simple_mem_ref (ref_to_res); | |
1467 | tree src = var; | |
1468 | ||
1469 | if (code == IFN_GOACC_REDUCTION_SETUP) | |
1470 | { | |
1471 | src = dst; | |
1472 | dst = lhs; | |
1473 | lhs = NULL; | |
1474 | } | |
1475 | gimple_seq_add_stmt (&seq, gimple_build_assign (dst, src)); | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | /* Copy VAR to LHS, if there is an LHS. */ | |
1480 | if (lhs) | |
1481 | gimple_seq_add_stmt (&seq, gimple_build_assign (lhs, var)); | |
1482 | ||
1483 | gsi_replace_with_seq (&gsi, seq, true); | |
1484 | } | |
1485 | ||
1486 | /* Main entry point for oacc transformations which run on the device | |
1487 | compiler after LTO, so we know what the target device is at this | |
1488 | point (including the host fallback). */ | |
1489 | ||
1490 | static unsigned int | |
1491 | execute_oacc_device_lower () | |
1492 | { | |
1493 | tree attrs = oacc_get_fn_attrib (current_function_decl); | |
1494 | ||
1495 | if (!attrs) | |
1496 | /* Not an offloaded function. */ | |
1497 | return 0; | |
1498 | ||
1499 | /* Parse the default dim argument exactly once. */ | |
1500 | if ((const void *)flag_openacc_dims != &flag_openacc_dims) | |
1501 | { | |
1502 | oacc_parse_default_dims (flag_openacc_dims); | |
1503 | flag_openacc_dims = (char *)&flag_openacc_dims; | |
1504 | } | |
1505 | ||
b0f271ce TS |
1506 | bool is_oacc_kernels |
1507 | = (lookup_attribute ("oacc kernels", | |
1508 | DECL_ATTRIBUTES (current_function_decl)) != NULL); | |
1509 | bool is_oacc_kernels_parallelized | |
1510 | = (lookup_attribute ("oacc kernels parallelized", | |
1511 | DECL_ATTRIBUTES (current_function_decl)) != NULL); | |
1512 | ||
fd71a9a2 TS |
1513 | /* Unparallelized OpenACC kernels constructs must get launched as 1 x 1 x 1 |
1514 | kernels, so remove the parallelism dimensions function attributes | |
1515 | potentially set earlier on. */ | |
1516 | if (is_oacc_kernels && !is_oacc_kernels_parallelized) | |
1517 | { | |
1518 | oacc_set_fn_attrib (current_function_decl, NULL, NULL); | |
1519 | attrs = oacc_get_fn_attrib (current_function_decl); | |
1520 | } | |
1521 | ||
629b3d75 MJ |
1522 | /* Discover, partition and process the loops. */ |
1523 | oacc_loop *loops = oacc_loop_discovery (); | |
1524 | int fn_level = oacc_fn_attrib_level (attrs); | |
1525 | ||
1526 | if (dump_file) | |
25651634 TS |
1527 | { |
1528 | if (fn_level >= 0) | |
1529 | fprintf (dump_file, "Function is OpenACC routine level %d\n", | |
1530 | fn_level); | |
b0f271ce TS |
1531 | else if (is_oacc_kernels) |
1532 | fprintf (dump_file, "Function is %s OpenACC kernels offload\n", | |
1533 | (is_oacc_kernels_parallelized | |
1534 | ? "parallelized" : "unparallelized")); | |
25651634 TS |
1535 | else |
1536 | fprintf (dump_file, "Function is OpenACC parallel offload\n"); | |
1537 | } | |
629b3d75 MJ |
1538 | |
1539 | unsigned outer_mask = fn_level >= 0 ? GOMP_DIM_MASK (fn_level) - 1 : 0; | |
1540 | unsigned used_mask = oacc_loop_partition (loops, outer_mask); | |
b0f271ce TS |
1541 | /* OpenACC kernels constructs are special: they currently don't use the |
1542 | generic oacc_loop infrastructure and attribute/dimension processing. */ | |
1543 | if (is_oacc_kernels && is_oacc_kernels_parallelized) | |
1544 | { | |
1545 | /* Parallelized OpenACC kernels constructs use gang parallelism. See | |
1546 | also tree-parloops.c:create_parallel_loop. */ | |
1547 | used_mask |= GOMP_DIM_MASK (GOMP_DIM_GANG); | |
1548 | } | |
629b3d75 | 1549 | |
b0f271ce | 1550 | int dims[GOMP_DIM_MAX]; |
629b3d75 MJ |
1551 | oacc_validate_dims (current_function_decl, attrs, dims, fn_level, used_mask); |
1552 | ||
1553 | if (dump_file) | |
1554 | { | |
1555 | const char *comma = "Compute dimensions ["; | |
1556 | for (int ix = 0; ix != GOMP_DIM_MAX; ix++, comma = ", ") | |
1557 | fprintf (dump_file, "%s%d", comma, dims[ix]); | |
1558 | fprintf (dump_file, "]\n"); | |
1559 | } | |
1560 | ||
1561 | oacc_loop_process (loops); | |
1562 | if (dump_file) | |
1563 | { | |
1564 | fprintf (dump_file, "OpenACC loops\n"); | |
1565 | dump_oacc_loop (dump_file, loops, 0); | |
1566 | fprintf (dump_file, "\n"); | |
1567 | } | |
5d390fd3 TS |
1568 | if (dump_enabled_p ()) |
1569 | { | |
1570 | oacc_loop *l = loops; | |
1571 | /* OpenACC kernels constructs are special: they currently don't use the | |
1572 | generic oacc_loop infrastructure. */ | |
1573 | if (is_oacc_kernels) | |
1574 | { | |
1575 | /* Create a fake oacc_loop for diagnostic purposes. */ | |
1576 | l = new_oacc_loop_raw (NULL, | |
1577 | DECL_SOURCE_LOCATION (current_function_decl)); | |
1578 | l->mask = used_mask; | |
1579 | } | |
1580 | else | |
1581 | { | |
1582 | /* Skip the outermost, dummy OpenACC loop */ | |
1583 | l = l->child; | |
1584 | } | |
1585 | if (l) | |
1586 | inform_oacc_loop (l); | |
1587 | if (is_oacc_kernels) | |
1588 | free_oacc_loop (l); | |
1589 | } | |
629b3d75 MJ |
1590 | |
1591 | /* Offloaded targets may introduce new basic blocks, which require | |
1592 | dominance information to update SSA. */ | |
1593 | calculate_dominance_info (CDI_DOMINATORS); | |
1594 | ||
1595 | /* Now lower internal loop functions to target-specific code | |
1596 | sequences. */ | |
1597 | basic_block bb; | |
1598 | FOR_ALL_BB_FN (bb, cfun) | |
1599 | for (gimple_stmt_iterator gsi = gsi_start_bb (bb); !gsi_end_p (gsi);) | |
1600 | { | |
1601 | gimple *stmt = gsi_stmt (gsi); | |
1602 | if (!is_gimple_call (stmt)) | |
1603 | { | |
1604 | gsi_next (&gsi); | |
1605 | continue; | |
1606 | } | |
1607 | ||
1608 | gcall *call = as_a <gcall *> (stmt); | |
1609 | if (!gimple_call_internal_p (call)) | |
1610 | { | |
1611 | gsi_next (&gsi); | |
1612 | continue; | |
1613 | } | |
1614 | ||
1615 | /* Rewind to allow rescan. */ | |
1616 | gsi_prev (&gsi); | |
1617 | bool rescan = false, remove = false; | |
1618 | enum internal_fn ifn_code = gimple_call_internal_fn (call); | |
1619 | ||
1620 | switch (ifn_code) | |
1621 | { | |
1622 | default: break; | |
1623 | ||
02889d23 CLT |
1624 | case IFN_GOACC_TILE: |
1625 | oacc_xform_tile (call); | |
1626 | rescan = true; | |
1627 | break; | |
1628 | ||
629b3d75 MJ |
1629 | case IFN_GOACC_LOOP: |
1630 | oacc_xform_loop (call); | |
1631 | rescan = true; | |
1632 | break; | |
1633 | ||
1634 | case IFN_GOACC_REDUCTION: | |
1635 | /* Mark the function for SSA renaming. */ | |
1636 | mark_virtual_operands_for_renaming (cfun); | |
1637 | ||
1638 | /* If the level is -1, this ended up being an unused | |
1639 | axis. Handle as a default. */ | |
1640 | if (integer_minus_onep (gimple_call_arg (call, 3))) | |
1641 | default_goacc_reduction (call); | |
1642 | else | |
1643 | targetm.goacc.reduction (call); | |
1644 | rescan = true; | |
1645 | break; | |
1646 | ||
1647 | case IFN_UNIQUE: | |
1648 | { | |
1649 | enum ifn_unique_kind kind | |
1650 | = ((enum ifn_unique_kind) | |
1651 | TREE_INT_CST_LOW (gimple_call_arg (call, 0))); | |
1652 | ||
1653 | switch (kind) | |
1654 | { | |
1655 | default: | |
02889d23 | 1656 | break; |
629b3d75 MJ |
1657 | |
1658 | case IFN_UNIQUE_OACC_FORK: | |
1659 | case IFN_UNIQUE_OACC_JOIN: | |
1660 | if (integer_minus_onep (gimple_call_arg (call, 2))) | |
1661 | remove = true; | |
1662 | else if (!targetm.goacc.fork_join | |
1663 | (call, dims, kind == IFN_UNIQUE_OACC_FORK)) | |
1664 | remove = true; | |
1665 | break; | |
1666 | ||
1667 | case IFN_UNIQUE_OACC_HEAD_MARK: | |
1668 | case IFN_UNIQUE_OACC_TAIL_MARK: | |
1669 | remove = true; | |
1670 | break; | |
1671 | } | |
1672 | break; | |
1673 | } | |
1674 | } | |
1675 | ||
1676 | if (gsi_end_p (gsi)) | |
1677 | /* We rewound past the beginning of the BB. */ | |
1678 | gsi = gsi_start_bb (bb); | |
1679 | else | |
1680 | /* Undo the rewind. */ | |
1681 | gsi_next (&gsi); | |
1682 | ||
1683 | if (remove) | |
1684 | { | |
1685 | if (gimple_vdef (call)) | |
1686 | replace_uses_by (gimple_vdef (call), gimple_vuse (call)); | |
1687 | if (gimple_call_lhs (call)) | |
1688 | { | |
1689 | /* Propagate the data dependency var. */ | |
1690 | gimple *ass = gimple_build_assign (gimple_call_lhs (call), | |
1691 | gimple_call_arg (call, 1)); | |
1692 | gsi_replace (&gsi, ass, false); | |
1693 | } | |
1694 | else | |
1695 | gsi_remove (&gsi, true); | |
1696 | } | |
1697 | else if (!rescan) | |
1698 | /* If not rescanning, advance over the call. */ | |
1699 | gsi_next (&gsi); | |
1700 | } | |
1701 | ||
1702 | free_oacc_loop (loops); | |
1703 | ||
1704 | return 0; | |
1705 | } | |
1706 | ||
1707 | /* Default launch dimension validator. Force everything to 1. A | |
1708 | backend that wants to provide larger dimensions must override this | |
1709 | hook. */ | |
1710 | ||
1711 | bool | |
1712 | default_goacc_validate_dims (tree ARG_UNUSED (decl), int *dims, | |
1713 | int ARG_UNUSED (fn_level)) | |
1714 | { | |
1715 | bool changed = false; | |
1716 | ||
1717 | for (unsigned ix = 0; ix != GOMP_DIM_MAX; ix++) | |
1718 | { | |
1719 | if (dims[ix] != 1) | |
1720 | { | |
1721 | dims[ix] = 1; | |
1722 | changed = true; | |
1723 | } | |
1724 | } | |
1725 | ||
1726 | return changed; | |
1727 | } | |
1728 | ||
01914336 | 1729 | /* Default dimension bound is unknown on accelerator and 1 on host. */ |
629b3d75 MJ |
1730 | |
1731 | int | |
1732 | default_goacc_dim_limit (int ARG_UNUSED (axis)) | |
1733 | { | |
1734 | #ifdef ACCEL_COMPILER | |
1735 | return 0; | |
1736 | #else | |
1737 | return 1; | |
1738 | #endif | |
1739 | } | |
1740 | ||
1741 | namespace { | |
1742 | ||
1743 | const pass_data pass_data_oacc_device_lower = | |
1744 | { | |
1745 | GIMPLE_PASS, /* type */ | |
1746 | "oaccdevlow", /* name */ | |
fd2b8c8b | 1747 | OPTGROUP_OMP, /* optinfo_flags */ |
629b3d75 MJ |
1748 | TV_NONE, /* tv_id */ |
1749 | PROP_cfg, /* properties_required */ | |
1750 | 0 /* Possibly PROP_gimple_eomp. */, /* properties_provided */ | |
1751 | 0, /* properties_destroyed */ | |
1752 | 0, /* todo_flags_start */ | |
1753 | TODO_update_ssa | TODO_cleanup_cfg, /* todo_flags_finish */ | |
1754 | }; | |
1755 | ||
1756 | class pass_oacc_device_lower : public gimple_opt_pass | |
1757 | { | |
1758 | public: | |
1759 | pass_oacc_device_lower (gcc::context *ctxt) | |
1760 | : gimple_opt_pass (pass_data_oacc_device_lower, ctxt) | |
1761 | {} | |
1762 | ||
1763 | /* opt_pass methods: */ | |
1764 | virtual bool gate (function *) { return flag_openacc; }; | |
1765 | ||
1766 | virtual unsigned int execute (function *) | |
1767 | { | |
1768 | return execute_oacc_device_lower (); | |
1769 | } | |
1770 | ||
1771 | }; // class pass_oacc_device_lower | |
1772 | ||
1773 | } // anon namespace | |
1774 | ||
1775 | gimple_opt_pass * | |
1776 | make_pass_oacc_device_lower (gcc::context *ctxt) | |
1777 | { | |
1778 | return new pass_oacc_device_lower (ctxt); | |
1779 | } | |
1780 | ||
0c6b03b5 AM |
1781 | \f |
1782 | /* Rewrite GOMP_SIMT_ENTER_ALLOC call given by GSI and remove the preceding | |
1783 | GOMP_SIMT_ENTER call identifying the privatized variables, which are | |
1784 | turned to structure fields and receive a DECL_VALUE_EXPR accordingly. | |
1785 | Set *REGIMPLIFY to true, except if no privatized variables were seen. */ | |
1786 | ||
1787 | static void | |
1788 | ompdevlow_adjust_simt_enter (gimple_stmt_iterator *gsi, bool *regimplify) | |
1789 | { | |
1790 | gimple *alloc_stmt = gsi_stmt (*gsi); | |
1791 | tree simtrec = gimple_call_lhs (alloc_stmt); | |
1792 | tree simduid = gimple_call_arg (alloc_stmt, 0); | |
1793 | gimple *enter_stmt = SSA_NAME_DEF_STMT (simduid); | |
1794 | gcc_assert (gimple_call_internal_p (enter_stmt, IFN_GOMP_SIMT_ENTER)); | |
1795 | tree rectype = lang_hooks.types.make_type (RECORD_TYPE); | |
1796 | TYPE_ARTIFICIAL (rectype) = TYPE_NAMELESS (rectype) = 1; | |
1797 | TREE_ADDRESSABLE (rectype) = 1; | |
1798 | TREE_TYPE (simtrec) = build_pointer_type (rectype); | |
1799 | for (unsigned i = 1; i < gimple_call_num_args (enter_stmt); i++) | |
1800 | { | |
1801 | tree *argp = gimple_call_arg_ptr (enter_stmt, i); | |
1802 | if (*argp == null_pointer_node) | |
1803 | continue; | |
1804 | gcc_assert (TREE_CODE (*argp) == ADDR_EXPR | |
1805 | && VAR_P (TREE_OPERAND (*argp, 0))); | |
1806 | tree var = TREE_OPERAND (*argp, 0); | |
1807 | ||
1808 | tree field = build_decl (DECL_SOURCE_LOCATION (var), FIELD_DECL, | |
1809 | DECL_NAME (var), TREE_TYPE (var)); | |
1810 | SET_DECL_ALIGN (field, DECL_ALIGN (var)); | |
1811 | DECL_USER_ALIGN (field) = DECL_USER_ALIGN (var); | |
1812 | TREE_THIS_VOLATILE (field) = TREE_THIS_VOLATILE (var); | |
1813 | ||
1814 | insert_field_into_struct (rectype, field); | |
1815 | ||
1816 | tree t = build_simple_mem_ref (simtrec); | |
1817 | t = build3 (COMPONENT_REF, TREE_TYPE (var), t, field, NULL); | |
1818 | TREE_THIS_VOLATILE (t) = TREE_THIS_VOLATILE (var); | |
1819 | SET_DECL_VALUE_EXPR (var, t); | |
1820 | DECL_HAS_VALUE_EXPR_P (var) = 1; | |
1821 | *regimplify = true; | |
1822 | } | |
1823 | layout_type (rectype); | |
1824 | tree size = TYPE_SIZE_UNIT (rectype); | |
1825 | tree align = build_int_cst (TREE_TYPE (size), TYPE_ALIGN_UNIT (rectype)); | |
1826 | ||
1827 | alloc_stmt | |
1828 | = gimple_build_call_internal (IFN_GOMP_SIMT_ENTER_ALLOC, 2, size, align); | |
1829 | gimple_call_set_lhs (alloc_stmt, simtrec); | |
1830 | gsi_replace (gsi, alloc_stmt, false); | |
1831 | gimple_stmt_iterator enter_gsi = gsi_for_stmt (enter_stmt); | |
1832 | enter_stmt = gimple_build_assign (simduid, gimple_call_arg (enter_stmt, 0)); | |
1833 | gsi_replace (&enter_gsi, enter_stmt, false); | |
1834 | ||
1835 | use_operand_p use; | |
1836 | gimple *exit_stmt; | |
1837 | if (single_imm_use (simtrec, &use, &exit_stmt)) | |
1838 | { | |
1839 | gcc_assert (gimple_call_internal_p (exit_stmt, IFN_GOMP_SIMT_EXIT)); | |
1840 | gimple_stmt_iterator exit_gsi = gsi_for_stmt (exit_stmt); | |
1841 | tree clobber = build_constructor (rectype, NULL); | |
1842 | TREE_THIS_VOLATILE (clobber) = 1; | |
1843 | exit_stmt = gimple_build_assign (build_simple_mem_ref (simtrec), clobber); | |
1844 | gsi_insert_before (&exit_gsi, exit_stmt, GSI_SAME_STMT); | |
1845 | } | |
1846 | else | |
1847 | gcc_checking_assert (has_zero_uses (simtrec)); | |
1848 | } | |
1849 | ||
1850 | /* Callback for walk_gimple_stmt used to scan for SIMT-privatized variables. */ | |
1851 | ||
1852 | static tree | |
1853 | find_simtpriv_var_op (tree *tp, int *walk_subtrees, void *) | |
1854 | { | |
1855 | tree t = *tp; | |
1856 | ||
1857 | if (VAR_P (t) | |
1858 | && DECL_HAS_VALUE_EXPR_P (t) | |
1859 | && lookup_attribute ("omp simt private", DECL_ATTRIBUTES (t))) | |
1860 | { | |
1861 | *walk_subtrees = 0; | |
1862 | return t; | |
1863 | } | |
1864 | return NULL_TREE; | |
1865 | } | |
1866 | ||
629b3d75 MJ |
1867 | /* Cleanup uses of SIMT placeholder internal functions: on non-SIMT targets, |
1868 | VF is 1 and LANE is 0; on SIMT targets, VF is folded to a constant, and | |
1869 | LANE is kept to be expanded to RTL later on. Also cleanup all other SIMT | |
1870 | internal functions on non-SIMT targets, and likewise some SIMD internal | |
1871 | functions on SIMT targets. */ | |
1872 | ||
1873 | static unsigned int | |
1874 | execute_omp_device_lower () | |
1875 | { | |
1876 | int vf = targetm.simt.vf ? targetm.simt.vf () : 1; | |
0c6b03b5 | 1877 | bool regimplify = false; |
629b3d75 MJ |
1878 | basic_block bb; |
1879 | gimple_stmt_iterator gsi; | |
1880 | FOR_EACH_BB_FN (bb, cfun) | |
1881 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
1882 | { | |
1883 | gimple *stmt = gsi_stmt (gsi); | |
1884 | if (!is_gimple_call (stmt) || !gimple_call_internal_p (stmt)) | |
1885 | continue; | |
1886 | tree lhs = gimple_call_lhs (stmt), rhs = NULL_TREE; | |
1887 | tree type = lhs ? TREE_TYPE (lhs) : integer_type_node; | |
1888 | switch (gimple_call_internal_fn (stmt)) | |
1889 | { | |
1890 | case IFN_GOMP_USE_SIMT: | |
1891 | rhs = vf == 1 ? integer_zero_node : integer_one_node; | |
1892 | break; | |
0c6b03b5 AM |
1893 | case IFN_GOMP_SIMT_ENTER: |
1894 | rhs = vf == 1 ? gimple_call_arg (stmt, 0) : NULL_TREE; | |
1895 | goto simtreg_enter_exit; | |
1896 | case IFN_GOMP_SIMT_ENTER_ALLOC: | |
1897 | if (vf != 1) | |
1898 | ompdevlow_adjust_simt_enter (&gsi, ®implify); | |
1899 | rhs = vf == 1 ? null_pointer_node : NULL_TREE; | |
1900 | goto simtreg_enter_exit; | |
1901 | case IFN_GOMP_SIMT_EXIT: | |
1902 | simtreg_enter_exit: | |
1903 | if (vf != 1) | |
1904 | continue; | |
1905 | unlink_stmt_vdef (stmt); | |
1906 | break; | |
629b3d75 MJ |
1907 | case IFN_GOMP_SIMT_LANE: |
1908 | case IFN_GOMP_SIMT_LAST_LANE: | |
1909 | rhs = vf == 1 ? build_zero_cst (type) : NULL_TREE; | |
1910 | break; | |
1911 | case IFN_GOMP_SIMT_VF: | |
1912 | rhs = build_int_cst (type, vf); | |
1913 | break; | |
1914 | case IFN_GOMP_SIMT_ORDERED_PRED: | |
1915 | rhs = vf == 1 ? integer_zero_node : NULL_TREE; | |
1916 | if (rhs || !lhs) | |
1917 | unlink_stmt_vdef (stmt); | |
1918 | break; | |
1919 | case IFN_GOMP_SIMT_VOTE_ANY: | |
1920 | case IFN_GOMP_SIMT_XCHG_BFLY: | |
1921 | case IFN_GOMP_SIMT_XCHG_IDX: | |
1922 | rhs = vf == 1 ? gimple_call_arg (stmt, 0) : NULL_TREE; | |
1923 | break; | |
1924 | case IFN_GOMP_SIMD_LANE: | |
1925 | case IFN_GOMP_SIMD_LAST_LANE: | |
1926 | rhs = vf != 1 ? build_zero_cst (type) : NULL_TREE; | |
1927 | break; | |
1928 | case IFN_GOMP_SIMD_VF: | |
1929 | rhs = vf != 1 ? build_one_cst (type) : NULL_TREE; | |
1930 | break; | |
1931 | default: | |
1932 | continue; | |
1933 | } | |
1934 | if (lhs && !rhs) | |
1935 | continue; | |
1936 | stmt = lhs ? gimple_build_assign (lhs, rhs) : gimple_build_nop (); | |
1937 | gsi_replace (&gsi, stmt, false); | |
1938 | } | |
0c6b03b5 AM |
1939 | if (regimplify) |
1940 | FOR_EACH_BB_REVERSE_FN (bb, cfun) | |
1941 | for (gsi = gsi_last_bb (bb); !gsi_end_p (gsi); gsi_prev (&gsi)) | |
1942 | if (walk_gimple_stmt (&gsi, NULL, find_simtpriv_var_op, NULL)) | |
1943 | { | |
1944 | if (gimple_clobber_p (gsi_stmt (gsi))) | |
1945 | gsi_remove (&gsi, true); | |
1946 | else | |
1947 | gimple_regimplify_operands (gsi_stmt (gsi), &gsi); | |
1948 | } | |
629b3d75 MJ |
1949 | if (vf != 1) |
1950 | cfun->has_force_vectorize_loops = false; | |
1951 | return 0; | |
1952 | } | |
1953 | ||
1954 | namespace { | |
1955 | ||
1956 | const pass_data pass_data_omp_device_lower = | |
1957 | { | |
1958 | GIMPLE_PASS, /* type */ | |
1959 | "ompdevlow", /* name */ | |
fd2b8c8b | 1960 | OPTGROUP_OMP, /* optinfo_flags */ |
629b3d75 MJ |
1961 | TV_NONE, /* tv_id */ |
1962 | PROP_cfg, /* properties_required */ | |
1963 | PROP_gimple_lomp_dev, /* properties_provided */ | |
1964 | 0, /* properties_destroyed */ | |
1965 | 0, /* todo_flags_start */ | |
1966 | TODO_update_ssa, /* todo_flags_finish */ | |
1967 | }; | |
1968 | ||
1969 | class pass_omp_device_lower : public gimple_opt_pass | |
1970 | { | |
1971 | public: | |
1972 | pass_omp_device_lower (gcc::context *ctxt) | |
1973 | : gimple_opt_pass (pass_data_omp_device_lower, ctxt) | |
1974 | {} | |
1975 | ||
1976 | /* opt_pass methods: */ | |
4cea8675 | 1977 | virtual bool gate (function *fun) |
629b3d75 | 1978 | { |
4cea8675 | 1979 | return !(fun->curr_properties & PROP_gimple_lomp_dev); |
629b3d75 MJ |
1980 | } |
1981 | virtual unsigned int execute (function *) | |
1982 | { | |
1983 | return execute_omp_device_lower (); | |
1984 | } | |
1985 | ||
1986 | }; // class pass_expand_omp_ssa | |
1987 | ||
1988 | } // anon namespace | |
1989 | ||
1990 | gimple_opt_pass * | |
1991 | make_pass_omp_device_lower (gcc::context *ctxt) | |
1992 | { | |
1993 | return new pass_omp_device_lower (ctxt); | |
1994 | } | |
1995 | ||
1996 | /* "omp declare target link" handling pass. */ | |
1997 | ||
1998 | namespace { | |
1999 | ||
2000 | const pass_data pass_data_omp_target_link = | |
2001 | { | |
2002 | GIMPLE_PASS, /* type */ | |
2003 | "omptargetlink", /* name */ | |
fd2b8c8b | 2004 | OPTGROUP_OMP, /* optinfo_flags */ |
629b3d75 MJ |
2005 | TV_NONE, /* tv_id */ |
2006 | PROP_ssa, /* properties_required */ | |
2007 | 0, /* properties_provided */ | |
2008 | 0, /* properties_destroyed */ | |
2009 | 0, /* todo_flags_start */ | |
2010 | TODO_update_ssa, /* todo_flags_finish */ | |
2011 | }; | |
2012 | ||
2013 | class pass_omp_target_link : public gimple_opt_pass | |
2014 | { | |
2015 | public: | |
2016 | pass_omp_target_link (gcc::context *ctxt) | |
2017 | : gimple_opt_pass (pass_data_omp_target_link, ctxt) | |
2018 | {} | |
2019 | ||
2020 | /* opt_pass methods: */ | |
2021 | virtual bool gate (function *fun) | |
2022 | { | |
2023 | #ifdef ACCEL_COMPILER | |
46dbeb40 | 2024 | return offloading_function_p (fun->decl); |
629b3d75 MJ |
2025 | #else |
2026 | (void) fun; | |
2027 | return false; | |
2028 | #endif | |
2029 | } | |
2030 | ||
2031 | virtual unsigned execute (function *); | |
2032 | }; | |
2033 | ||
2034 | /* Callback for walk_gimple_stmt used to scan for link var operands. */ | |
2035 | ||
2036 | static tree | |
2037 | find_link_var_op (tree *tp, int *walk_subtrees, void *) | |
2038 | { | |
2039 | tree t = *tp; | |
2040 | ||
56f71478 JJ |
2041 | if (VAR_P (t) |
2042 | && DECL_HAS_VALUE_EXPR_P (t) | |
2043 | && is_global_var (t) | |
629b3d75 MJ |
2044 | && lookup_attribute ("omp declare target link", DECL_ATTRIBUTES (t))) |
2045 | { | |
2046 | *walk_subtrees = 0; | |
2047 | return t; | |
2048 | } | |
2049 | ||
2050 | return NULL_TREE; | |
2051 | } | |
2052 | ||
2053 | unsigned | |
2054 | pass_omp_target_link::execute (function *fun) | |
2055 | { | |
2056 | basic_block bb; | |
2057 | FOR_EACH_BB_FN (bb, fun) | |
2058 | { | |
2059 | gimple_stmt_iterator gsi; | |
2060 | for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) | |
2061 | if (walk_gimple_stmt (&gsi, NULL, find_link_var_op, NULL)) | |
2062 | gimple_regimplify_operands (gsi_stmt (gsi), &gsi); | |
2063 | } | |
2064 | ||
2065 | return 0; | |
2066 | } | |
2067 | ||
2068 | } // anon namespace | |
2069 | ||
2070 | gimple_opt_pass * | |
2071 | make_pass_omp_target_link (gcc::context *ctxt) | |
2072 | { | |
2073 | return new pass_omp_target_link (ctxt); | |
2074 | } |