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-c/Analysis.h>
42 #include <llvm-c/Transforms/Scalar.h>
43 #include <llvm-c/BitWriter.h>
44
45
46 /* Only MCJIT is available as of LLVM SVN r216982 */
47 #if HAVE_LLVM >= 0x0306
48 # define USE_MCJIT 1
49 #elif defined(PIPE_ARCH_PPC_64) || defined(PIPE_ARCH_S390) || defined(PIPE_ARCH_ARM) || defined(PIPE_ARCH_AARCH64)
50 # define USE_MCJIT 1
51 #endif
52
53 #if defined(USE_MCJIT)
54 static const bool use_mcjit = USE_MCJIT;
55 #else
56 static bool use_mcjit = FALSE;
57 #endif
58
59
60 #ifdef DEBUG
61 unsigned gallivm_debug = 0;
62
63 static const struct debug_named_value lp_bld_debug_flags[] = {
64 { "tgsi", GALLIVM_DEBUG_TGSI, NULL },
65 { "ir", GALLIVM_DEBUG_IR, NULL },
66 { "asm", GALLIVM_DEBUG_ASM, NULL },
67 { "nopt", GALLIVM_DEBUG_NO_OPT, NULL },
68 { "perf", GALLIVM_DEBUG_PERF, NULL },
69 { "no_brilinear", GALLIVM_DEBUG_NO_BRILINEAR, NULL },
70 { "no_rho_approx", GALLIVM_DEBUG_NO_RHO_APPROX, NULL },
71 { "no_quad_lod", GALLIVM_DEBUG_NO_QUAD_LOD, NULL },
72 { "gc", GALLIVM_DEBUG_GC, NULL },
73 { "dumpbc", GALLIVM_DEBUG_DUMP_BC, NULL },
74 DEBUG_NAMED_VALUE_END
75 };
76
77 DEBUG_GET_ONCE_FLAGS_OPTION(gallivm_debug, "GALLIVM_DEBUG", lp_bld_debug_flags, 0)
78 #endif
79
80
81 static boolean gallivm_initialized = FALSE;
82
83 unsigned lp_native_vector_width;
84
85
86 /*
87 * Optimization values are:
88 * - 0: None (-O0)
89 * - 1: Less (-O1)
90 * - 2: Default (-O2, -Os)
91 * - 3: Aggressive (-O3)
92 *
93 * See also CodeGenOpt::Level in llvm/Target/TargetMachine.h
94 */
95 enum LLVM_CodeGenOpt_Level {
96 None, // -O0
97 Less, // -O1
98 Default, // -O2, -Os
99 Aggressive // -O3
100 };
101
102
103 /**
104 * Create the LLVM (optimization) pass manager and install
105 * relevant optimization passes.
106 * \return TRUE for success, FALSE for failure
107 */
108 static boolean
create_pass_manager(struct gallivm_state * gallivm)109 create_pass_manager(struct gallivm_state *gallivm)
110 {
111 assert(!gallivm->passmgr);
112 assert(gallivm->target);
113
114 gallivm->passmgr = LLVMCreateFunctionPassManagerForModule(gallivm->module);
115 if (!gallivm->passmgr)
116 return FALSE;
117 /*
118 * TODO: some per module pass manager with IPO passes might be helpful -
119 * the generated texture functions may benefit from inlining if they are
120 * simple, or constant propagation into them, etc.
121 */
122
123 #if HAVE_LLVM < 0x0309
124 // Old versions of LLVM get the DataLayout from the pass manager.
125 LLVMAddTargetData(gallivm->target, gallivm->passmgr);
126 #endif
127
128 {
129 char *td_str;
130 // New ones from the Module.
131 td_str = LLVMCopyStringRepOfTargetData(gallivm->target);
132 LLVMSetDataLayout(gallivm->module, td_str);
133 free(td_str);
134 }
135
136 if ((gallivm_debug & GALLIVM_DEBUG_NO_OPT) == 0) {
137 /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
138 * but there are more on SVN.
139 * TODO: Add more passes.
140 */
141 LLVMAddScalarReplAggregatesPass(gallivm->passmgr);
142 LLVMAddLICMPass(gallivm->passmgr);
143 LLVMAddCFGSimplificationPass(gallivm->passmgr);
144 LLVMAddReassociatePass(gallivm->passmgr);
145 LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
146 LLVMAddConstantPropagationPass(gallivm->passmgr);
147 LLVMAddInstructionCombiningPass(gallivm->passmgr);
148 LLVMAddGVNPass(gallivm->passmgr);
149 }
150 else {
151 /* We need at least this pass to prevent the backends to fail in
152 * unexpected ways.
153 */
154 LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
155 }
156
157 return TRUE;
158 }
159
160
161 /**
162 * Free gallivm object's LLVM allocations, but not any generated code
163 * nor the gallivm object itself.
164 */
165 void
gallivm_free_ir(struct gallivm_state * gallivm)166 gallivm_free_ir(struct gallivm_state *gallivm)
167 {
168 if (gallivm->passmgr) {
169 LLVMDisposePassManager(gallivm->passmgr);
170 }
171
172 if (gallivm->engine) {
173 /* This will already destroy any associated module */
174 LLVMDisposeExecutionEngine(gallivm->engine);
175 } else if (gallivm->module) {
176 LLVMDisposeModule(gallivm->module);
177 }
178
179 FREE(gallivm->module_name);
180
181 if (!use_mcjit) {
182 /* Don't free the TargetData, it's owned by the exec engine */
183 } else {
184 if (gallivm->target) {
185 LLVMDisposeTargetData(gallivm->target);
186 }
187 }
188
189 if (gallivm->builder)
190 LLVMDisposeBuilder(gallivm->builder);
191
192 /* The LLVMContext should be owned by the parent of gallivm. */
193
194 gallivm->engine = NULL;
195 gallivm->target = NULL;
196 gallivm->module = NULL;
197 gallivm->module_name = NULL;
198 gallivm->passmgr = NULL;
199 gallivm->context = NULL;
200 gallivm->builder = NULL;
201 }
202
203
204 /**
205 * Free LLVM-generated code. Should be done AFTER gallivm_free_ir().
206 */
207 static void
gallivm_free_code(struct gallivm_state * gallivm)208 gallivm_free_code(struct gallivm_state *gallivm)
209 {
210 assert(!gallivm->module);
211 assert(!gallivm->engine);
212 lp_free_generated_code(gallivm->code);
213 gallivm->code = NULL;
214 lp_free_memory_manager(gallivm->memorymgr);
215 gallivm->memorymgr = NULL;
216 }
217
218
219 static boolean
init_gallivm_engine(struct gallivm_state * gallivm)220 init_gallivm_engine(struct gallivm_state *gallivm)
221 {
222 if (1) {
223 enum LLVM_CodeGenOpt_Level optlevel;
224 char *error = NULL;
225 int ret;
226
227 if (gallivm_debug & GALLIVM_DEBUG_NO_OPT) {
228 optlevel = None;
229 }
230 else {
231 optlevel = Default;
232 }
233
234 ret = lp_build_create_jit_compiler_for_module(&gallivm->engine,
235 &gallivm->code,
236 gallivm->module,
237 gallivm->memorymgr,
238 (unsigned) optlevel,
239 use_mcjit,
240 &error);
241 if (ret) {
242 _debug_printf("%s\n", error);
243 LLVMDisposeMessage(error);
244 goto fail;
245 }
246 }
247
248 if (!use_mcjit) {
249 gallivm->target = LLVMGetExecutionEngineTargetData(gallivm->engine);
250 if (!gallivm->target)
251 goto fail;
252 } else {
253 if (0) {
254 /*
255 * Dump the data layout strings.
256 */
257
258 LLVMTargetDataRef target = LLVMGetExecutionEngineTargetData(gallivm->engine);
259 char *data_layout;
260 char *engine_data_layout;
261
262 data_layout = LLVMCopyStringRepOfTargetData(gallivm->target);
263 engine_data_layout = LLVMCopyStringRepOfTargetData(target);
264
265 if (1) {
266 debug_printf("module target data = %s\n", data_layout);
267 debug_printf("engine target data = %s\n", engine_data_layout);
268 }
269
270 free(data_layout);
271 free(engine_data_layout);
272 }
273 }
274
275 return TRUE;
276
277 fail:
278 return FALSE;
279 }
280
281
282 /**
283 * Allocate gallivm LLVM objects.
284 * \return TRUE for success, FALSE for failure
285 */
286 static boolean
init_gallivm_state(struct gallivm_state * gallivm,const char * name,LLVMContextRef context)287 init_gallivm_state(struct gallivm_state *gallivm, const char *name,
288 LLVMContextRef context)
289 {
290 assert(!gallivm->context);
291 assert(!gallivm->module);
292
293 if (!lp_build_init())
294 return FALSE;
295
296 gallivm->context = context;
297
298 if (!gallivm->context)
299 goto fail;
300
301 gallivm->module_name = NULL;
302 if (name) {
303 size_t size = strlen(name) + 1;
304 gallivm->module_name = MALLOC(size);
305 if (gallivm->module_name) {
306 memcpy(gallivm->module_name, name, size);
307 }
308 }
309
310 gallivm->module = LLVMModuleCreateWithNameInContext(name,
311 gallivm->context);
312 if (!gallivm->module)
313 goto fail;
314
315 gallivm->builder = LLVMCreateBuilderInContext(gallivm->context);
316 if (!gallivm->builder)
317 goto fail;
318
319 gallivm->memorymgr = lp_get_default_memory_manager();
320 if (!gallivm->memorymgr)
321 goto fail;
322
323 /* FIXME: MC-JIT only allows compiling one module at a time, and it must be
324 * complete when MC-JIT is created. So defer the MC-JIT engine creation for
325 * now.
326 */
327 if (!use_mcjit) {
328 if (!init_gallivm_engine(gallivm)) {
329 goto fail;
330 }
331 } else {
332 /*
333 * MC-JIT engine compiles the module immediately on creation, so we can't
334 * obtain the target data from it. Instead we create a target data layout
335 * from a string.
336 *
337 * The produced layout strings are not precisely the same, but should make
338 * no difference for the kind of optimization passes we run.
339 *
340 * For reference this is the layout string on x64:
341 *
342 * 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
343 *
344 * See also:
345 * - http://llvm.org/docs/LangRef.html#datalayout
346 */
347
348 {
349 const unsigned pointer_size = 8 * sizeof(void *);
350 char layout[512];
351 util_snprintf(layout, sizeof layout, "%c-p:%u:%u:%u-i64:64:64-a0:0:%u-s0:%u:%u",
352 #ifdef PIPE_ARCH_LITTLE_ENDIAN
353 'e', // little endian
354 #else
355 'E', // big endian
356 #endif
357 pointer_size, pointer_size, pointer_size, // pointer size, abi alignment, preferred alignment
358 pointer_size, // aggregate preferred alignment
359 pointer_size, pointer_size); // stack objects abi alignment, preferred alignment
360
361 gallivm->target = LLVMCreateTargetData(layout);
362 if (!gallivm->target) {
363 return FALSE;
364 }
365 }
366 }
367
368 if (!create_pass_manager(gallivm))
369 goto fail;
370
371 return TRUE;
372
373 fail:
374 gallivm_free_ir(gallivm);
375 gallivm_free_code(gallivm);
376 return FALSE;
377 }
378
379
380 boolean
lp_build_init(void)381 lp_build_init(void)
382 {
383 if (gallivm_initialized)
384 return TRUE;
385
386
387 /* LLVMLinkIn* are no-ops at runtime. They just ensure the respective
388 * component is linked at buildtime, which is sufficient for its static
389 * constructors to be called at load time.
390 */
391 #if defined(USE_MCJIT)
392 # if USE_MCJIT
393 LLVMLinkInMCJIT();
394 # else
395 LLVMLinkInJIT();
396 # endif
397 #else
398 use_mcjit = debug_get_bool_option("GALLIVM_MCJIT", FALSE);
399 LLVMLinkInJIT();
400 LLVMLinkInMCJIT();
401 #endif
402
403 #ifdef DEBUG
404 gallivm_debug = debug_get_option_gallivm_debug();
405 #endif
406
407 lp_set_target_options();
408
409 util_cpu_detect();
410
411 /* For simulating less capable machines */
412 #ifdef DEBUG
413 if (debug_get_bool_option("LP_FORCE_SSE2", FALSE)) {
414 assert(util_cpu_caps.has_sse2);
415 util_cpu_caps.has_sse3 = 0;
416 util_cpu_caps.has_ssse3 = 0;
417 util_cpu_caps.has_sse4_1 = 0;
418 util_cpu_caps.has_sse4_2 = 0;
419 util_cpu_caps.has_avx = 0;
420 util_cpu_caps.has_avx2 = 0;
421 util_cpu_caps.has_f16c = 0;
422 util_cpu_caps.has_fma = 0;
423 }
424 #endif
425
426 /* AMD Bulldozer AVX's throughput is the same as SSE2; and because using
427 * 8-wide vector needs more floating ops than 4-wide (due to padding), it is
428 * actually more efficient to use 4-wide vectors on this processor.
429 *
430 * See also:
431 * - http://www.anandtech.com/show/4955/the-bulldozer-review-amd-fx8150-tested/2
432 */
433 if (util_cpu_caps.has_avx &&
434 util_cpu_caps.has_intel) {
435 lp_native_vector_width = 256;
436 } else {
437 /* Leave it at 128, even when no SIMD extensions are available.
438 * Really needs to be a multiple of 128 so can fit 4 floats.
439 */
440 lp_native_vector_width = 128;
441 }
442
443 lp_native_vector_width = debug_get_num_option("LP_NATIVE_VECTOR_WIDTH",
444 lp_native_vector_width);
445
446 if (lp_native_vector_width <= 128) {
447 /* Hide AVX support, as often LLVM AVX intrinsics are only guarded by
448 * "util_cpu_caps.has_avx" predicate, and lack the
449 * "lp_native_vector_width > 128" predicate. And also to ensure a more
450 * consistent behavior, allowing one to test SSE2 on AVX machines.
451 * XXX: should not play games with util_cpu_caps directly as it might
452 * get used for other things outside llvm too.
453 */
454 util_cpu_caps.has_avx = 0;
455 util_cpu_caps.has_avx2 = 0;
456 util_cpu_caps.has_f16c = 0;
457 util_cpu_caps.has_fma = 0;
458 }
459 if (HAVE_LLVM < 0x0304 || !use_mcjit) {
460 /* AVX2 support has only been tested with LLVM 3.4, and it requires
461 * MCJIT. */
462 util_cpu_caps.has_avx2 = 0;
463 }
464
465 #ifdef PIPE_ARCH_PPC_64
466 /* Set the NJ bit in VSCR to 0 so denormalized values are handled as
467 * specified by IEEE standard (PowerISA 2.06 - Section 6.3). This guarantees
468 * that some rounding and half-float to float handling does not round
469 * incorrectly to 0.
470 * XXX: should eventually follow same logic on all platforms.
471 * Right now denorms get explicitly disabled (but elsewhere) for x86,
472 * whereas ppc64 explicitly enables them...
473 */
474 if (util_cpu_caps.has_altivec) {
475 unsigned short mask[] = { 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
476 0xFFFF, 0xFFFF, 0xFFFE, 0xFFFF };
477 __asm (
478 "mfvscr %%v1\n"
479 "vand %0,%%v1,%0\n"
480 "mtvscr %0"
481 :
482 : "r" (*mask)
483 );
484 }
485 #endif
486
487 gallivm_initialized = TRUE;
488
489 return TRUE;
490 }
491
492
493
494 /**
495 * Create a new gallivm_state object.
496 */
497 struct gallivm_state *
gallivm_create(const char * name,LLVMContextRef context)498 gallivm_create(const char *name, LLVMContextRef context)
499 {
500 struct gallivm_state *gallivm;
501
502 gallivm = CALLOC_STRUCT(gallivm_state);
503 if (gallivm) {
504 if (!init_gallivm_state(gallivm, name, context)) {
505 FREE(gallivm);
506 gallivm = NULL;
507 }
508 }
509
510 return gallivm;
511 }
512
513
514 /**
515 * Destroy a gallivm_state object.
516 */
517 void
gallivm_destroy(struct gallivm_state * gallivm)518 gallivm_destroy(struct gallivm_state *gallivm)
519 {
520 gallivm_free_ir(gallivm);
521 gallivm_free_code(gallivm);
522 FREE(gallivm);
523 }
524
525
526 /**
527 * Validate a function.
528 * Verification is only done with debug builds.
529 */
530 void
gallivm_verify_function(struct gallivm_state * gallivm,LLVMValueRef func)531 gallivm_verify_function(struct gallivm_state *gallivm,
532 LLVMValueRef func)
533 {
534 /* Verify the LLVM IR. If invalid, dump and abort */
535 #ifdef DEBUG
536 if (LLVMVerifyFunction(func, LLVMPrintMessageAction)) {
537 lp_debug_dump_value(func);
538 assert(0);
539 return;
540 }
541 #endif
542
543 if (gallivm_debug & GALLIVM_DEBUG_IR) {
544 /* Print the LLVM IR to stderr */
545 lp_debug_dump_value(func);
546 debug_printf("\n");
547 }
548 }
549
550
551 /**
552 * Compile a module.
553 * This does IR optimization on all functions in the module.
554 */
555 void
gallivm_compile_module(struct gallivm_state * gallivm)556 gallivm_compile_module(struct gallivm_state *gallivm)
557 {
558 LLVMValueRef func;
559 int64_t time_begin = 0;
560
561 assert(!gallivm->compiled);
562
563 if (gallivm->builder) {
564 LLVMDisposeBuilder(gallivm->builder);
565 gallivm->builder = NULL;
566 }
567
568 if (gallivm_debug & GALLIVM_DEBUG_PERF)
569 time_begin = os_time_get();
570
571 /* Run optimization passes */
572 LLVMInitializeFunctionPassManager(gallivm->passmgr);
573 func = LLVMGetFirstFunction(gallivm->module);
574 while (func) {
575 if (0) {
576 debug_printf("optimizing func %s...\n", LLVMGetValueName(func));
577 }
578
579 /* Disable frame pointer omission on debug/profile builds */
580 /* XXX: And workaround http://llvm.org/PR21435 */
581 #if HAVE_LLVM >= 0x0307 && \
582 (defined(DEBUG) || defined(PROFILE) || \
583 defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64))
584 LLVMAddTargetDependentFunctionAttr(func, "no-frame-pointer-elim", "true");
585 LLVMAddTargetDependentFunctionAttr(func, "no-frame-pointer-elim-non-leaf", "true");
586 #endif
587
588 LLVMRunFunctionPassManager(gallivm->passmgr, func);
589 func = LLVMGetNextFunction(func);
590 }
591 LLVMFinalizeFunctionPassManager(gallivm->passmgr);
592
593 if (gallivm_debug & GALLIVM_DEBUG_PERF) {
594 int64_t time_end = os_time_get();
595 int time_msec = (int)(time_end - time_begin) / 1000;
596 assert(gallivm->module_name);
597 debug_printf("optimizing module %s took %d msec\n",
598 gallivm->module_name, time_msec);
599 }
600
601 /* Dump byte code to a file */
602 if (gallivm_debug & GALLIVM_DEBUG_DUMP_BC) {
603 char filename[256];
604 assert(gallivm->module_name);
605 util_snprintf(filename, sizeof(filename), "ir_%s.bc", gallivm->module_name);
606 LLVMWriteBitcodeToFile(gallivm->module, filename);
607 debug_printf("%s written\n", filename);
608 debug_printf("Invoke as \"llc %s%s -o - %s\"\n",
609 (HAVE_LLVM >= 0x0305) ? "[-mcpu=<-mcpu option>] " : "",
610 "[-mattr=<-mattr option(s)>]",
611 filename);
612 }
613
614 if (use_mcjit) {
615 /* Setting the module's DataLayout to an empty string will cause the
616 * ExecutionEngine to copy to the DataLayout string from its target
617 * machine to the module. As of LLVM 3.8 the module and the execution
618 * engine are required to have the same DataLayout.
619 *
620 * We must make sure we do this after running the optimization passes,
621 * because those passes need a correct datalayout string. For example,
622 * if those optimization passes see an empty datalayout, they will assume
623 * this is a little endian target and will do optimizations that break big
624 * endian machines.
625 *
626 * TODO: This is just a temporary work-around. The correct solution is
627 * for gallivm_init_state() to create a TargetMachine and pull the
628 * DataLayout from there. Currently, the TargetMachine used by llvmpipe
629 * is being implicitly created by the EngineBuilder in
630 * lp_build_create_jit_compiler_for_module()
631 */
632 LLVMSetDataLayout(gallivm->module, "");
633 assert(!gallivm->engine);
634 if (!init_gallivm_engine(gallivm)) {
635 assert(0);
636 }
637 }
638 assert(gallivm->engine);
639
640 ++gallivm->compiled;
641
642 if (gallivm_debug & GALLIVM_DEBUG_ASM) {
643 LLVMValueRef llvm_func = LLVMGetFirstFunction(gallivm->module);
644
645 while (llvm_func) {
646 /*
647 * Need to filter out functions which don't have an implementation,
648 * such as the intrinsics. May not be sufficient in case of IPO?
649 * LLVMGetPointerToGlobal() will abort otherwise.
650 */
651 if (!LLVMIsDeclaration(llvm_func)) {
652 void *func_code = LLVMGetPointerToGlobal(gallivm->engine, llvm_func);
653 lp_disassemble(llvm_func, func_code);
654 }
655 llvm_func = LLVMGetNextFunction(llvm_func);
656 }
657 }
658
659 #if defined(PROFILE)
660 {
661 LLVMValueRef llvm_func = LLVMGetFirstFunction(gallivm->module);
662
663 while (llvm_func) {
664 if (!LLVMIsDeclaration(llvm_func)) {
665 void *func_code = LLVMGetPointerToGlobal(gallivm->engine, llvm_func);
666 lp_profile(llvm_func, func_code);
667 }
668 llvm_func = LLVMGetNextFunction(llvm_func);
669 }
670 }
671 #endif
672 }
673
674
675
676 func_pointer
gallivm_jit_function(struct gallivm_state * gallivm,LLVMValueRef func)677 gallivm_jit_function(struct gallivm_state *gallivm,
678 LLVMValueRef func)
679 {
680 void *code;
681 func_pointer jit_func;
682 int64_t time_begin = 0;
683
684 assert(gallivm->compiled);
685 assert(gallivm->engine);
686
687 if (gallivm_debug & GALLIVM_DEBUG_PERF)
688 time_begin = os_time_get();
689
690 code = LLVMGetPointerToGlobal(gallivm->engine, func);
691 assert(code);
692 jit_func = pointer_to_func(code);
693
694 if (gallivm_debug & GALLIVM_DEBUG_PERF) {
695 int64_t time_end = os_time_get();
696 int time_msec = (int)(time_end - time_begin) / 1000;
697 debug_printf(" jitting func %s took %d msec\n",
698 LLVMGetValueName(func), time_msec);
699 }
700
701 return jit_func;
702 }
703