1 /**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28
29 #include "pipe/p_config.h"
30 #include "pipe/p_compiler.h"
31 #include "util/u_cpu_detect.h"
32 #include "util/u_debug.h"
33 #include "util/u_memory.h"
34 #include "util/simple_list.h"
35 #include "util/os_time.h"
36 #include "lp_bld.h"
37 #include "lp_bld_debug.h"
38 #include "lp_bld_misc.h"
39 #include "lp_bld_init.h"
40
41 #include <llvm/Config/llvm-config.h>
42 #include <llvm-c/Analysis.h>
43 #include <llvm-c/Transforms/Scalar.h>
44 #if LLVM_VERSION_MAJOR >= 7
45 #include <llvm-c/Transforms/Utils.h>
46 #endif
47 #include <llvm-c/BitWriter.h>
48 #if GALLIVM_HAVE_CORO
49 #if LLVM_VERSION_MAJOR <= 8 && (defined(PIPE_ARCH_AARCH64) || defined (PIPE_ARCH_ARM) || defined(PIPE_ARCH_S390))
50 #include <llvm-c/Transforms/IPO.h>
51 #endif
52 #include <llvm-c/Transforms/Coroutines.h>
53 #endif
54
55 unsigned gallivm_perf = 0;
56
57 static const struct debug_named_value lp_bld_perf_flags[] = {
58 { "no_brilinear", GALLIVM_PERF_NO_BRILINEAR, "disable brilinear optimization" },
59 { "no_rho_approx", GALLIVM_PERF_NO_RHO_APPROX, "disable rho_approx optimization" },
60 { "no_quad_lod", GALLIVM_PERF_NO_QUAD_LOD, "disable quad_lod optimization" },
61 { "no_aos_sampling", GALLIVM_PERF_NO_AOS_SAMPLING, "disable aos sampling optimization" },
62 { "nopt", GALLIVM_PERF_NO_OPT, "disable optimization passes to speed up shader compilation" },
63 { "no_filter_hacks", GALLIVM_PERF_NO_BRILINEAR | GALLIVM_PERF_NO_RHO_APPROX |
64 GALLIVM_PERF_NO_QUAD_LOD, "disable filter optimization hacks" },
65 DEBUG_NAMED_VALUE_END
66 };
67
68 #ifdef DEBUG
69 unsigned gallivm_debug = 0;
70
71 static const struct debug_named_value lp_bld_debug_flags[] = {
72 { "tgsi", GALLIVM_DEBUG_TGSI, NULL },
73 { "ir", GALLIVM_DEBUG_IR, NULL },
74 { "asm", GALLIVM_DEBUG_ASM, NULL },
75 { "perf", GALLIVM_DEBUG_PERF, NULL },
76 { "gc", GALLIVM_DEBUG_GC, NULL },
77 { "dumpbc", GALLIVM_DEBUG_DUMP_BC, NULL },
78 DEBUG_NAMED_VALUE_END
79 };
80
81 DEBUG_GET_ONCE_FLAGS_OPTION(gallivm_debug, "GALLIVM_DEBUG", lp_bld_debug_flags, 0)
82 #endif
83
84
85 static boolean gallivm_initialized = FALSE;
86
87 unsigned lp_native_vector_width;
88
89
90 /*
91 * Optimization values are:
92 * - 0: None (-O0)
93 * - 1: Less (-O1)
94 * - 2: Default (-O2, -Os)
95 * - 3: Aggressive (-O3)
96 *
97 * See also CodeGenOpt::Level in llvm/Target/TargetMachine.h
98 */
99 enum LLVM_CodeGenOpt_Level {
100 None, // -O0
101 Less, // -O1
102 Default, // -O2, -Os
103 Aggressive // -O3
104 };
105
106
107 /**
108 * Create the LLVM (optimization) pass manager and install
109 * relevant optimization passes.
110 * \return TRUE for success, FALSE for failure
111 */
112 static boolean
create_pass_manager(struct gallivm_state * gallivm)113 create_pass_manager(struct gallivm_state *gallivm)
114 {
115 assert(!gallivm->passmgr);
116 assert(gallivm->target);
117
118 gallivm->passmgr = LLVMCreateFunctionPassManagerForModule(gallivm->module);
119 if (!gallivm->passmgr)
120 return FALSE;
121
122 #if GALLIVM_HAVE_CORO
123 gallivm->cgpassmgr = LLVMCreatePassManager();
124 #endif
125 /*
126 * TODO: some per module pass manager with IPO passes might be helpful -
127 * the generated texture functions may benefit from inlining if they are
128 * simple, or constant propagation into them, etc.
129 */
130
131 {
132 char *td_str;
133 // New ones from the Module.
134 td_str = LLVMCopyStringRepOfTargetData(gallivm->target);
135 LLVMSetDataLayout(gallivm->module, td_str);
136 free(td_str);
137 }
138
139 #if GALLIVM_HAVE_CORO
140 #if LLVM_VERSION_MAJOR <= 8 && (defined(PIPE_ARCH_AARCH64) || defined (PIPE_ARCH_ARM) || defined(PIPE_ARCH_S390))
141 LLVMAddArgumentPromotionPass(gallivm->cgpassmgr);
142 LLVMAddFunctionAttrsPass(gallivm->cgpassmgr);
143 #endif
144 LLVMAddCoroEarlyPass(gallivm->cgpassmgr);
145 LLVMAddCoroSplitPass(gallivm->cgpassmgr);
146 LLVMAddCoroElidePass(gallivm->cgpassmgr);
147 #endif
148
149 if ((gallivm_perf & GALLIVM_PERF_NO_OPT) == 0) {
150 /*
151 * TODO: Evaluate passes some more - keeping in mind
152 * both quality of generated code and compile times.
153 */
154 /*
155 * NOTE: if you change this, don't forget to change the output
156 * with GALLIVM_DEBUG_DUMP_BC in gallivm_compile_module.
157 */
158 LLVMAddScalarReplAggregatesPass(gallivm->passmgr);
159 LLVMAddEarlyCSEPass(gallivm->passmgr);
160 LLVMAddCFGSimplificationPass(gallivm->passmgr);
161 /*
162 * FIXME: LICM is potentially quite useful. However, for some
163 * rather crazy shaders the compile time can reach _hours_ per shader,
164 * due to licm implying lcssa (since llvm 3.5), which can take forever.
165 * Even for sane shaders, the cost of licm is rather high (and not just
166 * due to lcssa, licm itself too), though mostly only in cases when it
167 * can actually move things, so having to disable it is a pity.
168 * LLVMAddLICMPass(gallivm->passmgr);
169 */
170 LLVMAddReassociatePass(gallivm->passmgr);
171 LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
172 #if LLVM_VERSION_MAJOR <= 11
173 LLVMAddConstantPropagationPass(gallivm->passmgr);
174 #else
175 LLVMAddInstructionSimplifyPass(gallivm->passmgr);
176 #endif
177 LLVMAddInstructionCombiningPass(gallivm->passmgr);
178 LLVMAddGVNPass(gallivm->passmgr);
179 }
180 else {
181 /* We need at least this pass to prevent the backends to fail in
182 * unexpected ways.
183 */
184 LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
185 }
186 #if GALLIVM_HAVE_CORO
187 LLVMAddCoroCleanupPass(gallivm->passmgr);
188 #endif
189
190 return TRUE;
191 }
192
193
194 /**
195 * Free gallivm object's LLVM allocations, but not any generated code
196 * nor the gallivm object itself.
197 */
198 void
gallivm_free_ir(struct gallivm_state * gallivm)199 gallivm_free_ir(struct gallivm_state *gallivm)
200 {
201 if (gallivm->passmgr) {
202 LLVMDisposePassManager(gallivm->passmgr);
203 }
204
205 #if GALLIVM_HAVE_CORO
206 if (gallivm->cgpassmgr) {
207 LLVMDisposePassManager(gallivm->cgpassmgr);
208 }
209 #endif
210
211 if (gallivm->engine) {
212 /* This will already destroy any associated module */
213 LLVMDisposeExecutionEngine(gallivm->engine);
214 } else if (gallivm->module) {
215 LLVMDisposeModule(gallivm->module);
216 }
217
218 if (gallivm->cache) {
219 lp_free_objcache(gallivm->cache->jit_obj_cache);
220 free(gallivm->cache->data);
221 }
222 FREE(gallivm->module_name);
223
224 if (gallivm->target) {
225 LLVMDisposeTargetData(gallivm->target);
226 }
227
228 if (gallivm->builder)
229 LLVMDisposeBuilder(gallivm->builder);
230
231 /* The LLVMContext should be owned by the parent of gallivm. */
232
233 gallivm->engine = NULL;
234 gallivm->target = NULL;
235 gallivm->module = NULL;
236 gallivm->module_name = NULL;
237 gallivm->cgpassmgr = NULL;
238 gallivm->passmgr = NULL;
239 gallivm->context = NULL;
240 gallivm->builder = NULL;
241 gallivm->cache = NULL;
242 }
243
244
245 /**
246 * Free LLVM-generated code. Should be done AFTER gallivm_free_ir().
247 */
248 static void
gallivm_free_code(struct gallivm_state * gallivm)249 gallivm_free_code(struct gallivm_state *gallivm)
250 {
251 assert(!gallivm->module);
252 assert(!gallivm->engine);
253 lp_free_generated_code(gallivm->code);
254 gallivm->code = NULL;
255 lp_free_memory_manager(gallivm->memorymgr);
256 gallivm->memorymgr = NULL;
257 }
258
259
260 static boolean
init_gallivm_engine(struct gallivm_state * gallivm)261 init_gallivm_engine(struct gallivm_state *gallivm)
262 {
263 if (1) {
264 enum LLVM_CodeGenOpt_Level optlevel;
265 char *error = NULL;
266 int ret;
267
268 if (gallivm_perf & GALLIVM_PERF_NO_OPT) {
269 optlevel = None;
270 }
271 else {
272 optlevel = Default;
273 }
274
275 ret = lp_build_create_jit_compiler_for_module(&gallivm->engine,
276 &gallivm->code,
277 gallivm->cache,
278 gallivm->module,
279 gallivm->memorymgr,
280 (unsigned) optlevel,
281 &error);
282 if (ret) {
283 _debug_printf("%s\n", error);
284 LLVMDisposeMessage(error);
285 goto fail;
286 }
287 }
288
289 if (0) {
290 /*
291 * Dump the data layout strings.
292 */
293
294 LLVMTargetDataRef target = LLVMGetExecutionEngineTargetData(gallivm->engine);
295 char *data_layout;
296 char *engine_data_layout;
297
298 data_layout = LLVMCopyStringRepOfTargetData(gallivm->target);
299 engine_data_layout = LLVMCopyStringRepOfTargetData(target);
300
301 if (1) {
302 debug_printf("module target data = %s\n", data_layout);
303 debug_printf("engine target data = %s\n", engine_data_layout);
304 }
305
306 free(data_layout);
307 free(engine_data_layout);
308 }
309
310 return TRUE;
311
312 fail:
313 return FALSE;
314 }
315
316
317 /**
318 * Allocate gallivm LLVM objects.
319 * \return TRUE for success, FALSE for failure
320 */
321 static boolean
init_gallivm_state(struct gallivm_state * gallivm,const char * name,LLVMContextRef context,struct lp_cached_code * cache)322 init_gallivm_state(struct gallivm_state *gallivm, const char *name,
323 LLVMContextRef context, struct lp_cached_code *cache)
324 {
325 assert(!gallivm->context);
326 assert(!gallivm->module);
327
328 if (!lp_build_init())
329 return FALSE;
330
331 gallivm->context = context;
332 gallivm->cache = cache;
333 if (!gallivm->context)
334 goto fail;
335
336 gallivm->module_name = NULL;
337 if (name) {
338 size_t size = strlen(name) + 1;
339 gallivm->module_name = MALLOC(size);
340 if (gallivm->module_name) {
341 memcpy(gallivm->module_name, name, size);
342 }
343 }
344
345 gallivm->module = LLVMModuleCreateWithNameInContext(name,
346 gallivm->context);
347 if (!gallivm->module)
348 goto fail;
349
350 gallivm->builder = LLVMCreateBuilderInContext(gallivm->context);
351 if (!gallivm->builder)
352 goto fail;
353
354 gallivm->memorymgr = lp_get_default_memory_manager();
355 if (!gallivm->memorymgr)
356 goto fail;
357
358 /* FIXME: MC-JIT only allows compiling one module at a time, and it must be
359 * complete when MC-JIT is created. So defer the MC-JIT engine creation for
360 * now.
361 */
362
363 /*
364 * MC-JIT engine compiles the module immediately on creation, so we can't
365 * obtain the target data from it. Instead we create a target data layout
366 * from a string.
367 *
368 * The produced layout strings are not precisely the same, but should make
369 * no difference for the kind of optimization passes we run.
370 *
371 * For reference this is the layout string on x64:
372 *
373 * e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-f128:128:128-n8:16:32:64
374 *
375 * See also:
376 * - http://llvm.org/docs/LangRef.html#datalayout
377 */
378
379 {
380 const unsigned pointer_size = 8 * sizeof(void *);
381 char layout[512];
382 snprintf(layout, sizeof layout, "%c-p:%u:%u:%u-i64:64:64-a0:0:%u-s0:%u:%u",
383 #if UTIL_ARCH_LITTLE_ENDIAN
384 'e', // little endian
385 #else
386 'E', // big endian
387 #endif
388 pointer_size, pointer_size, pointer_size, // pointer size, abi alignment, preferred alignment
389 pointer_size, // aggregate preferred alignment
390 pointer_size, pointer_size); // stack objects abi alignment, preferred alignment
391
392 gallivm->target = LLVMCreateTargetData(layout);
393 if (!gallivm->target) {
394 return FALSE;
395 }
396 }
397
398 if (!create_pass_manager(gallivm))
399 goto fail;
400
401 return TRUE;
402
403 fail:
404 gallivm_free_ir(gallivm);
405 gallivm_free_code(gallivm);
406 return FALSE;
407 }
408
409
410 boolean
lp_build_init(void)411 lp_build_init(void)
412 {
413 if (gallivm_initialized)
414 return TRUE;
415
416
417 /* LLVMLinkIn* are no-ops at runtime. They just ensure the respective
418 * component is linked at buildtime, which is sufficient for its static
419 * constructors to be called at load time.
420 */
421 LLVMLinkInMCJIT();
422
423 #ifdef DEBUG
424 gallivm_debug = debug_get_option_gallivm_debug();
425 #endif
426
427 gallivm_perf = debug_get_flags_option("GALLIVM_PERF", lp_bld_perf_flags, 0 );
428
429 lp_set_target_options();
430
431 util_cpu_detect();
432
433 /* For simulating less capable machines */
434 #ifdef DEBUG
435 if (debug_get_bool_option("LP_FORCE_SSE2", FALSE)) {
436 assert(util_cpu_caps.has_sse2);
437 util_cpu_caps.has_sse3 = 0;
438 util_cpu_caps.has_ssse3 = 0;
439 util_cpu_caps.has_sse4_1 = 0;
440 util_cpu_caps.has_sse4_2 = 0;
441 util_cpu_caps.has_avx = 0;
442 util_cpu_caps.has_avx2 = 0;
443 util_cpu_caps.has_f16c = 0;
444 util_cpu_caps.has_fma = 0;
445 }
446 #endif
447
448 if (util_cpu_caps.has_avx2 || util_cpu_caps.has_avx) {
449 lp_native_vector_width = 256;
450 } else {
451 /* Leave it at 128, even when no SIMD extensions are available.
452 * Really needs to be a multiple of 128 so can fit 4 floats.
453 */
454 lp_native_vector_width = 128;
455 }
456
457 lp_native_vector_width = debug_get_num_option("LP_NATIVE_VECTOR_WIDTH",
458 lp_native_vector_width);
459
460 #if LLVM_VERSION_MAJOR < 4
461 if (lp_native_vector_width <= 128) {
462 /* Hide AVX support, as often LLVM AVX intrinsics are only guarded by
463 * "util_cpu_caps.has_avx" predicate, and lack the
464 * "lp_native_vector_width > 128" predicate. And also to ensure a more
465 * consistent behavior, allowing one to test SSE2 on AVX machines.
466 * XXX: should not play games with util_cpu_caps directly as it might
467 * get used for other things outside llvm too.
468 */
469 util_cpu_caps.has_avx = 0;
470 util_cpu_caps.has_avx2 = 0;
471 util_cpu_caps.has_f16c = 0;
472 util_cpu_caps.has_fma = 0;
473 }
474 #endif
475
476 #ifdef PIPE_ARCH_PPC_64
477 /* Set the NJ bit in VSCR to 0 so denormalized values are handled as
478 * specified by IEEE standard (PowerISA 2.06 - Section 6.3). This guarantees
479 * that some rounding and half-float to float handling does not round
480 * incorrectly to 0.
481 * XXX: should eventually follow same logic on all platforms.
482 * Right now denorms get explicitly disabled (but elsewhere) for x86,
483 * whereas ppc64 explicitly enables them...
484 */
485 if (util_cpu_caps.has_altivec) {
486 unsigned short mask[] = { 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
487 0xFFFF, 0xFFFF, 0xFFFE, 0xFFFF };
488 __asm (
489 "mfvscr %%v1\n"
490 "vand %0,%%v1,%0\n"
491 "mtvscr %0"
492 :
493 : "r" (*mask)
494 );
495 }
496 #endif
497
498 gallivm_initialized = TRUE;
499
500 return TRUE;
501 }
502
503
504
505 /**
506 * Create a new gallivm_state object.
507 */
508 struct gallivm_state *
gallivm_create(const char * name,LLVMContextRef context,struct lp_cached_code * cache)509 gallivm_create(const char *name, LLVMContextRef context,
510 struct lp_cached_code *cache)
511 {
512 struct gallivm_state *gallivm;
513
514 gallivm = CALLOC_STRUCT(gallivm_state);
515 if (gallivm) {
516 if (!init_gallivm_state(gallivm, name, context, cache)) {
517 FREE(gallivm);
518 gallivm = NULL;
519 }
520 }
521
522 assert(gallivm != NULL);
523 return gallivm;
524 }
525
526
527 /**
528 * Destroy a gallivm_state object.
529 */
530 void
gallivm_destroy(struct gallivm_state * gallivm)531 gallivm_destroy(struct gallivm_state *gallivm)
532 {
533 gallivm_free_ir(gallivm);
534 gallivm_free_code(gallivm);
535 FREE(gallivm);
536 }
537
538
539 /**
540 * Validate a function.
541 * Verification is only done with debug builds.
542 */
543 void
gallivm_verify_function(struct gallivm_state * gallivm,LLVMValueRef func)544 gallivm_verify_function(struct gallivm_state *gallivm,
545 LLVMValueRef func)
546 {
547 /* Verify the LLVM IR. If invalid, dump and abort */
548 #ifdef DEBUG
549 if (LLVMVerifyFunction(func, LLVMPrintMessageAction)) {
550 lp_debug_dump_value(func);
551 assert(0);
552 return;
553 }
554 #endif
555
556 if (gallivm_debug & GALLIVM_DEBUG_IR) {
557 /* Print the LLVM IR to stderr */
558 lp_debug_dump_value(func);
559 debug_printf("\n");
560 }
561 }
562
563
564 /**
565 * Compile a module.
566 * This does IR optimization on all functions in the module.
567 */
568 void
gallivm_compile_module(struct gallivm_state * gallivm)569 gallivm_compile_module(struct gallivm_state *gallivm)
570 {
571 LLVMValueRef func;
572 int64_t time_begin = 0;
573
574 assert(!gallivm->compiled);
575
576 if (gallivm->builder) {
577 LLVMDisposeBuilder(gallivm->builder);
578 gallivm->builder = NULL;
579 }
580
581 if (gallivm->cache && gallivm->cache->data_size) {
582 goto skip_cached;
583 }
584
585 /* Dump bitcode to a file */
586 if (gallivm_debug & GALLIVM_DEBUG_DUMP_BC) {
587 char filename[256];
588 assert(gallivm->module_name);
589 snprintf(filename, sizeof(filename), "ir_%s.bc", gallivm->module_name);
590 LLVMWriteBitcodeToFile(gallivm->module, filename);
591 debug_printf("%s written\n", filename);
592 debug_printf("Invoke as \"opt %s %s | llc -O%d %s%s\"\n",
593 gallivm_debug & GALLIVM_PERF_NO_OPT ? "-mem2reg" :
594 "-sroa -early-cse -simplifycfg -reassociate "
595 "-mem2reg -constprop -instcombine -gvn",
596 filename, gallivm_debug & GALLIVM_PERF_NO_OPT ? 0 : 2,
597 "[-mcpu=<-mcpu option>] ",
598 "[-mattr=<-mattr option(s)>]");
599 }
600
601 if (gallivm_debug & GALLIVM_DEBUG_PERF)
602 time_begin = os_time_get();
603
604 #if GALLIVM_HAVE_CORO
605 LLVMRunPassManager(gallivm->cgpassmgr, gallivm->module);
606 #endif
607 /* Run optimization passes */
608 LLVMInitializeFunctionPassManager(gallivm->passmgr);
609 func = LLVMGetFirstFunction(gallivm->module);
610 while (func) {
611 if (0) {
612 debug_printf("optimizing func %s...\n", LLVMGetValueName(func));
613 }
614
615 /* Disable frame pointer omission on debug/profile builds */
616 /* XXX: And workaround http://llvm.org/PR21435 */
617 #if defined(DEBUG) || defined(PROFILE) || defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
618 LLVMAddTargetDependentFunctionAttr(func, "no-frame-pointer-elim", "true");
619 LLVMAddTargetDependentFunctionAttr(func, "no-frame-pointer-elim-non-leaf", "true");
620 #endif
621
622 LLVMRunFunctionPassManager(gallivm->passmgr, func);
623 func = LLVMGetNextFunction(func);
624 }
625 LLVMFinalizeFunctionPassManager(gallivm->passmgr);
626
627 if (gallivm_debug & GALLIVM_DEBUG_PERF) {
628 int64_t time_end = os_time_get();
629 int time_msec = (int)((time_end - time_begin) / 1000);
630 assert(gallivm->module_name);
631 debug_printf("optimizing module %s took %d msec\n",
632 gallivm->module_name, time_msec);
633 }
634
635 /* Setting the module's DataLayout to an empty string will cause the
636 * ExecutionEngine to copy to the DataLayout string from its target machine
637 * to the module. As of LLVM 3.8 the module and the execution engine are
638 * required to have the same DataLayout.
639 *
640 * We must make sure we do this after running the optimization passes,
641 * because those passes need a correct datalayout string. For example, if
642 * those optimization passes see an empty datalayout, they will assume this
643 * is a little endian target and will do optimizations that break big endian
644 * machines.
645 *
646 * TODO: This is just a temporary work-around. The correct solution is for
647 * gallivm_init_state() to create a TargetMachine and pull the DataLayout
648 * from there. Currently, the TargetMachine used by llvmpipe is being
649 * implicitly created by the EngineBuilder in
650 * lp_build_create_jit_compiler_for_module()
651 */
652 skip_cached:
653 LLVMSetDataLayout(gallivm->module, "");
654 assert(!gallivm->engine);
655 if (!init_gallivm_engine(gallivm)) {
656 assert(0);
657 }
658 assert(gallivm->engine);
659
660 ++gallivm->compiled;
661
662 if (gallivm->debug_printf_hook)
663 LLVMAddGlobalMapping(gallivm->engine, gallivm->debug_printf_hook, debug_printf);
664
665 if (gallivm_debug & GALLIVM_DEBUG_ASM) {
666 LLVMValueRef llvm_func = LLVMGetFirstFunction(gallivm->module);
667
668 while (llvm_func) {
669 /*
670 * Need to filter out functions which don't have an implementation,
671 * such as the intrinsics. May not be sufficient in case of IPO?
672 * LLVMGetPointerToGlobal() will abort otherwise.
673 */
674 if (!LLVMIsDeclaration(llvm_func)) {
675 void *func_code = LLVMGetPointerToGlobal(gallivm->engine, llvm_func);
676 lp_disassemble(llvm_func, func_code);
677 }
678 llvm_func = LLVMGetNextFunction(llvm_func);
679 }
680 }
681
682 #if defined(PROFILE)
683 {
684 LLVMValueRef llvm_func = LLVMGetFirstFunction(gallivm->module);
685
686 while (llvm_func) {
687 if (!LLVMIsDeclaration(llvm_func)) {
688 void *func_code = LLVMGetPointerToGlobal(gallivm->engine, llvm_func);
689 lp_profile(llvm_func, func_code);
690 }
691 llvm_func = LLVMGetNextFunction(llvm_func);
692 }
693 }
694 #endif
695 }
696
697
698
699 func_pointer
gallivm_jit_function(struct gallivm_state * gallivm,LLVMValueRef func)700 gallivm_jit_function(struct gallivm_state *gallivm,
701 LLVMValueRef func)
702 {
703 void *code;
704 func_pointer jit_func;
705 int64_t time_begin = 0;
706
707 assert(gallivm->compiled);
708 assert(gallivm->engine);
709
710 if (gallivm_debug & GALLIVM_DEBUG_PERF)
711 time_begin = os_time_get();
712
713 code = LLVMGetPointerToGlobal(gallivm->engine, func);
714 assert(code);
715 jit_func = pointer_to_func(code);
716
717 if (gallivm_debug & GALLIVM_DEBUG_PERF) {
718 int64_t time_end = os_time_get();
719 int time_msec = (int)(time_end - time_begin) / 1000;
720 debug_printf(" jitting func %s took %d msec\n",
721 LLVMGetValueName(func), time_msec);
722 }
723
724 return jit_func;
725 }
726
gallivm_get_perf_flags(void)727 unsigned gallivm_get_perf_flags(void)
728 {
729 return gallivm_perf;
730 }
731