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 "os/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 /* Setting the module's DataLayout to an empty string will cause the
129 * ExecutionEngine to copy to the DataLayout string from its target
130 * machine to the module. As of LLVM 3.8 the module and the execution
131 * engine are required to have the same DataLayout.
132 *
133 * TODO: This is just a temporary work-around. The correct solution is
134 * for gallivm_init_state() to create a TargetMachine and pull the
135 * DataLayout from there. Currently, the TargetMachine used by llvmpipe
136 * is being implicitly created by the EngineBuilder in
137 * lp_build_create_jit_compiler_for_module()
138 */
139
140 #if HAVE_LLVM < 0x0308
141 {
142 char *td_str;
143 // New ones from the Module.
144 td_str = LLVMCopyStringRepOfTargetData(gallivm->target);
145 LLVMSetDataLayout(gallivm->module, td_str);
146 free(td_str);
147 }
148 #else
149 LLVMSetDataLayout(gallivm->module, "");
150 #endif
151
152 if ((gallivm_debug & GALLIVM_DEBUG_NO_OPT) == 0) {
153 /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
154 * but there are more on SVN.
155 * TODO: Add more passes.
156 */
157 LLVMAddScalarReplAggregatesPass(gallivm->passmgr);
158 LLVMAddLICMPass(gallivm->passmgr);
159 LLVMAddCFGSimplificationPass(gallivm->passmgr);
160 LLVMAddReassociatePass(gallivm->passmgr);
161 LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
162 LLVMAddConstantPropagationPass(gallivm->passmgr);
163 LLVMAddInstructionCombiningPass(gallivm->passmgr);
164 LLVMAddGVNPass(gallivm->passmgr);
165 }
166 else {
167 /* We need at least this pass to prevent the backends to fail in
168 * unexpected ways.
169 */
170 LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
171 }
172
173 return TRUE;
174 }
175
176
177 /**
178 * Free gallivm object's LLVM allocations, but not any generated code
179 * nor the gallivm object itself.
180 */
181 void
gallivm_free_ir(struct gallivm_state * gallivm)182 gallivm_free_ir(struct gallivm_state *gallivm)
183 {
184 if (gallivm->passmgr) {
185 LLVMDisposePassManager(gallivm->passmgr);
186 }
187
188 if (gallivm->engine) {
189 /* This will already destroy any associated module */
190 LLVMDisposeExecutionEngine(gallivm->engine);
191 } else if (gallivm->module) {
192 LLVMDisposeModule(gallivm->module);
193 }
194
195 FREE(gallivm->module_name);
196
197 if (!use_mcjit) {
198 /* Don't free the TargetData, it's owned by the exec engine */
199 } else {
200 if (gallivm->target) {
201 LLVMDisposeTargetData(gallivm->target);
202 }
203 }
204
205 if (gallivm->builder)
206 LLVMDisposeBuilder(gallivm->builder);
207
208 /* The LLVMContext should be owned by the parent of gallivm. */
209
210 gallivm->engine = NULL;
211 gallivm->target = NULL;
212 gallivm->module = NULL;
213 gallivm->module_name = NULL;
214 gallivm->passmgr = NULL;
215 gallivm->context = NULL;
216 gallivm->builder = NULL;
217 }
218
219
220 /**
221 * Free LLVM-generated code. Should be done AFTER gallivm_free_ir().
222 */
223 static void
gallivm_free_code(struct gallivm_state * gallivm)224 gallivm_free_code(struct gallivm_state *gallivm)
225 {
226 assert(!gallivm->module);
227 assert(!gallivm->engine);
228 lp_free_generated_code(gallivm->code);
229 gallivm->code = NULL;
230 lp_free_memory_manager(gallivm->memorymgr);
231 gallivm->memorymgr = NULL;
232 }
233
234
235 static boolean
init_gallivm_engine(struct gallivm_state * gallivm)236 init_gallivm_engine(struct gallivm_state *gallivm)
237 {
238 if (1) {
239 enum LLVM_CodeGenOpt_Level optlevel;
240 char *error = NULL;
241 int ret;
242
243 if (gallivm_debug & GALLIVM_DEBUG_NO_OPT) {
244 optlevel = None;
245 }
246 else {
247 optlevel = Default;
248 }
249
250 ret = lp_build_create_jit_compiler_for_module(&gallivm->engine,
251 &gallivm->code,
252 gallivm->module,
253 gallivm->memorymgr,
254 (unsigned) optlevel,
255 use_mcjit,
256 &error);
257 if (ret) {
258 _debug_printf("%s\n", error);
259 LLVMDisposeMessage(error);
260 goto fail;
261 }
262 }
263
264 if (!use_mcjit) {
265 gallivm->target = LLVMGetExecutionEngineTargetData(gallivm->engine);
266 if (!gallivm->target)
267 goto fail;
268 } else {
269 if (0) {
270 /*
271 * Dump the data layout strings.
272 */
273
274 LLVMTargetDataRef target = LLVMGetExecutionEngineTargetData(gallivm->engine);
275 char *data_layout;
276 char *engine_data_layout;
277
278 data_layout = LLVMCopyStringRepOfTargetData(gallivm->target);
279 engine_data_layout = LLVMCopyStringRepOfTargetData(target);
280
281 if (1) {
282 debug_printf("module target data = %s\n", data_layout);
283 debug_printf("engine target data = %s\n", engine_data_layout);
284 }
285
286 free(data_layout);
287 free(engine_data_layout);
288 }
289 }
290
291 return TRUE;
292
293 fail:
294 return FALSE;
295 }
296
297
298 /**
299 * Allocate gallivm LLVM objects.
300 * \return TRUE for success, FALSE for failure
301 */
302 static boolean
init_gallivm_state(struct gallivm_state * gallivm,const char * name,LLVMContextRef context)303 init_gallivm_state(struct gallivm_state *gallivm, const char *name,
304 LLVMContextRef context)
305 {
306 assert(!gallivm->context);
307 assert(!gallivm->module);
308
309 if (!lp_build_init())
310 return FALSE;
311
312 gallivm->context = context;
313
314 if (!gallivm->context)
315 goto fail;
316
317 gallivm->module_name = NULL;
318 if (name) {
319 size_t size = strlen(name) + 1;
320 gallivm->module_name = MALLOC(size);
321 if (gallivm->module_name) {
322 memcpy(gallivm->module_name, name, size);
323 }
324 }
325
326 gallivm->module = LLVMModuleCreateWithNameInContext(name,
327 gallivm->context);
328 if (!gallivm->module)
329 goto fail;
330
331 gallivm->builder = LLVMCreateBuilderInContext(gallivm->context);
332 if (!gallivm->builder)
333 goto fail;
334
335 gallivm->memorymgr = lp_get_default_memory_manager();
336 if (!gallivm->memorymgr)
337 goto fail;
338
339 /* FIXME: MC-JIT only allows compiling one module at a time, and it must be
340 * complete when MC-JIT is created. So defer the MC-JIT engine creation for
341 * now.
342 */
343 if (!use_mcjit) {
344 if (!init_gallivm_engine(gallivm)) {
345 goto fail;
346 }
347 } else {
348 /*
349 * MC-JIT engine compiles the module immediately on creation, so we can't
350 * obtain the target data from it. Instead we create a target data layout
351 * from a string.
352 *
353 * The produced layout strings are not precisely the same, but should make
354 * no difference for the kind of optimization passes we run.
355 *
356 * For reference this is the layout string on x64:
357 *
358 * 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
359 *
360 * See also:
361 * - http://llvm.org/docs/LangRef.html#datalayout
362 */
363
364 {
365 const unsigned pointer_size = 8 * sizeof(void *);
366 char layout[512];
367 util_snprintf(layout, sizeof layout, "%c-p:%u:%u:%u-i64:64:64-a0:0:%u-s0:%u:%u",
368 #ifdef PIPE_ARCH_LITTLE_ENDIAN
369 'e', // little endian
370 #else
371 'E', // big endian
372 #endif
373 pointer_size, pointer_size, pointer_size, // pointer size, abi alignment, preferred alignment
374 pointer_size, // aggregate preferred alignment
375 pointer_size, pointer_size); // stack objects abi alignment, preferred alignment
376
377 gallivm->target = LLVMCreateTargetData(layout);
378 if (!gallivm->target) {
379 return FALSE;
380 }
381 }
382 }
383
384 if (!create_pass_manager(gallivm))
385 goto fail;
386
387 return TRUE;
388
389 fail:
390 gallivm_free_ir(gallivm);
391 gallivm_free_code(gallivm);
392 return FALSE;
393 }
394
395
396 boolean
lp_build_init(void)397 lp_build_init(void)
398 {
399 if (gallivm_initialized)
400 return TRUE;
401
402
403 /* LLVMLinkIn* are no-ops at runtime. They just ensure the respective
404 * component is linked at buildtime, which is sufficient for its static
405 * constructors to be called at load time.
406 */
407 #if defined(USE_MCJIT)
408 # if USE_MCJIT
409 LLVMLinkInMCJIT();
410 # else
411 LLVMLinkInJIT();
412 # endif
413 #else
414 use_mcjit = debug_get_bool_option("GALLIVM_MCJIT", FALSE);
415 LLVMLinkInJIT();
416 LLVMLinkInMCJIT();
417 #endif
418
419 #ifdef DEBUG
420 gallivm_debug = debug_get_option_gallivm_debug();
421 #endif
422
423 lp_set_target_options();
424
425 util_cpu_detect();
426
427 /* For simulating less capable machines */
428 #ifdef DEBUG
429 if (debug_get_bool_option("LP_FORCE_SSE2", FALSE)) {
430 assert(util_cpu_caps.has_sse2);
431 util_cpu_caps.has_sse3 = 0;
432 util_cpu_caps.has_ssse3 = 0;
433 util_cpu_caps.has_sse4_1 = 0;
434 util_cpu_caps.has_sse4_2 = 0;
435 util_cpu_caps.has_avx = 0;
436 util_cpu_caps.has_avx2 = 0;
437 util_cpu_caps.has_f16c = 0;
438 util_cpu_caps.has_fma = 0;
439 }
440 #endif
441
442 /* AMD Bulldozer AVX's throughput is the same as SSE2; and because using
443 * 8-wide vector needs more floating ops than 4-wide (due to padding), it is
444 * actually more efficient to use 4-wide vectors on this processor.
445 *
446 * See also:
447 * - http://www.anandtech.com/show/4955/the-bulldozer-review-amd-fx8150-tested/2
448 */
449 if (util_cpu_caps.has_avx &&
450 util_cpu_caps.has_intel) {
451 lp_native_vector_width = 256;
452 } else {
453 /* Leave it at 128, even when no SIMD extensions are available.
454 * Really needs to be a multiple of 128 so can fit 4 floats.
455 */
456 lp_native_vector_width = 128;
457 }
458
459 lp_native_vector_width = debug_get_num_option("LP_NATIVE_VECTOR_WIDTH",
460 lp_native_vector_width);
461
462 if (lp_native_vector_width <= 128) {
463 /* Hide AVX support, as often LLVM AVX intrinsics are only guarded by
464 * "util_cpu_caps.has_avx" predicate, and lack the
465 * "lp_native_vector_width > 128" predicate. And also to ensure a more
466 * consistent behavior, allowing one to test SSE2 on AVX machines.
467 * XXX: should not play games with util_cpu_caps directly as it might
468 * get used for other things outside llvm too.
469 */
470 util_cpu_caps.has_avx = 0;
471 util_cpu_caps.has_avx2 = 0;
472 util_cpu_caps.has_f16c = 0;
473 util_cpu_caps.has_fma = 0;
474 }
475 if (HAVE_LLVM < 0x0304 || !use_mcjit) {
476 /* AVX2 support has only been tested with LLVM 3.4, and it requires
477 * MCJIT. */
478 util_cpu_caps.has_avx2 = 0;
479 }
480
481 #ifdef PIPE_ARCH_PPC_64
482 /* Set the NJ bit in VSCR to 0 so denormalized values are handled as
483 * specified by IEEE standard (PowerISA 2.06 - Section 6.3). This guarantees
484 * that some rounding and half-float to float handling does not round
485 * incorrectly to 0.
486 * XXX: should eventually follow same logic on all platforms.
487 * Right now denorms get explicitly disabled (but elsewhere) for x86,
488 * whereas ppc64 explicitly enables them...
489 */
490 if (util_cpu_caps.has_altivec) {
491 unsigned short mask[] = { 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
492 0xFFFF, 0xFFFF, 0xFFFE, 0xFFFF };
493 __asm (
494 "mfvscr %%v1\n"
495 "vand %0,%%v1,%0\n"
496 "mtvscr %0"
497 :
498 : "r" (*mask)
499 );
500 }
501 #endif
502
503 gallivm_initialized = TRUE;
504
505 return TRUE;
506 }
507
508
509
510 /**
511 * Create a new gallivm_state object.
512 */
513 struct gallivm_state *
gallivm_create(const char * name,LLVMContextRef context)514 gallivm_create(const char *name, LLVMContextRef context)
515 {
516 struct gallivm_state *gallivm;
517
518 gallivm = CALLOC_STRUCT(gallivm_state);
519 if (gallivm) {
520 if (!init_gallivm_state(gallivm, name, context)) {
521 FREE(gallivm);
522 gallivm = NULL;
523 }
524 }
525
526 return gallivm;
527 }
528
529
530 /**
531 * Destroy a gallivm_state object.
532 */
533 void
gallivm_destroy(struct gallivm_state * gallivm)534 gallivm_destroy(struct gallivm_state *gallivm)
535 {
536 gallivm_free_ir(gallivm);
537 gallivm_free_code(gallivm);
538 FREE(gallivm);
539 }
540
541
542 /**
543 * Validate a function.
544 * Verification is only done with debug builds.
545 */
546 void
gallivm_verify_function(struct gallivm_state * gallivm,LLVMValueRef func)547 gallivm_verify_function(struct gallivm_state *gallivm,
548 LLVMValueRef func)
549 {
550 /* Verify the LLVM IR. If invalid, dump and abort */
551 #ifdef DEBUG
552 if (LLVMVerifyFunction(func, LLVMPrintMessageAction)) {
553 lp_debug_dump_value(func);
554 assert(0);
555 return;
556 }
557 #endif
558
559 if (gallivm_debug & GALLIVM_DEBUG_IR) {
560 /* Print the LLVM IR to stderr */
561 lp_debug_dump_value(func);
562 debug_printf("\n");
563 }
564 }
565
566
567 /**
568 * Compile a module.
569 * This does IR optimization on all functions in the module.
570 */
571 void
gallivm_compile_module(struct gallivm_state * gallivm)572 gallivm_compile_module(struct gallivm_state *gallivm)
573 {
574 LLVMValueRef func;
575 int64_t time_begin = 0;
576
577 assert(!gallivm->compiled);
578
579 if (gallivm->builder) {
580 LLVMDisposeBuilder(gallivm->builder);
581 gallivm->builder = NULL;
582 }
583
584 if (gallivm_debug & GALLIVM_DEBUG_PERF)
585 time_begin = os_time_get();
586
587 /* Run optimization passes */
588 LLVMInitializeFunctionPassManager(gallivm->passmgr);
589 func = LLVMGetFirstFunction(gallivm->module);
590 while (func) {
591 if (0) {
592 debug_printf("optimizing func %s...\n", LLVMGetValueName(func));
593 }
594
595 /* Disable frame pointer omission on debug/profile builds */
596 /* XXX: And workaround http://llvm.org/PR21435 */
597 #if HAVE_LLVM >= 0x0307 && \
598 (defined(DEBUG) || defined(PROFILE) || \
599 defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64))
600 LLVMAddTargetDependentFunctionAttr(func, "no-frame-pointer-elim", "true");
601 LLVMAddTargetDependentFunctionAttr(func, "no-frame-pointer-elim-non-leaf", "true");
602 #endif
603
604 LLVMRunFunctionPassManager(gallivm->passmgr, func);
605 func = LLVMGetNextFunction(func);
606 }
607 LLVMFinalizeFunctionPassManager(gallivm->passmgr);
608
609 if (gallivm_debug & GALLIVM_DEBUG_PERF) {
610 int64_t time_end = os_time_get();
611 int time_msec = (int)(time_end - time_begin) / 1000;
612 assert(gallivm->module_name);
613 debug_printf("optimizing module %s took %d msec\n",
614 gallivm->module_name, time_msec);
615 }
616
617 /* Dump byte code to a file */
618 if (gallivm_debug & GALLIVM_DEBUG_DUMP_BC) {
619 char filename[256];
620 assert(gallivm->module_name);
621 util_snprintf(filename, sizeof(filename), "ir_%s.bc", gallivm->module_name);
622 LLVMWriteBitcodeToFile(gallivm->module, filename);
623 debug_printf("%s written\n", filename);
624 debug_printf("Invoke as \"llc %s%s -o - %s\"\n",
625 (HAVE_LLVM >= 0x0305) ? "[-mcpu=<-mcpu option] " : "",
626 "[-mattr=<-mattr option(s)>]",
627 filename);
628 }
629
630 if (use_mcjit) {
631 assert(!gallivm->engine);
632 if (!init_gallivm_engine(gallivm)) {
633 assert(0);
634 }
635 }
636 assert(gallivm->engine);
637
638 ++gallivm->compiled;
639
640 if (gallivm_debug & GALLIVM_DEBUG_ASM) {
641 LLVMValueRef llvm_func = LLVMGetFirstFunction(gallivm->module);
642
643 while (llvm_func) {
644 /*
645 * Need to filter out functions which don't have an implementation,
646 * such as the intrinsics. May not be sufficient in case of IPO?
647 * LLVMGetPointerToGlobal() will abort otherwise.
648 */
649 if (!LLVMIsDeclaration(llvm_func)) {
650 void *func_code = LLVMGetPointerToGlobal(gallivm->engine, llvm_func);
651 lp_disassemble(llvm_func, func_code);
652 }
653 llvm_func = LLVMGetNextFunction(llvm_func);
654 }
655 }
656
657 #if defined(PROFILE)
658 {
659 LLVMValueRef llvm_func = LLVMGetFirstFunction(gallivm->module);
660
661 while (llvm_func) {
662 if (!LLVMIsDeclaration(llvm_func)) {
663 void *func_code = LLVMGetPointerToGlobal(gallivm->engine, llvm_func);
664 lp_profile(llvm_func, func_code);
665 }
666 llvm_func = LLVMGetNextFunction(llvm_func);
667 }
668 }
669 #endif
670 }
671
672
673
674 func_pointer
gallivm_jit_function(struct gallivm_state * gallivm,LLVMValueRef func)675 gallivm_jit_function(struct gallivm_state *gallivm,
676 LLVMValueRef func)
677 {
678 void *code;
679 func_pointer jit_func;
680 int64_t time_begin = 0;
681
682 assert(gallivm->compiled);
683 assert(gallivm->engine);
684
685 if (gallivm_debug & GALLIVM_DEBUG_PERF)
686 time_begin = os_time_get();
687
688 code = LLVMGetPointerToGlobal(gallivm->engine, func);
689 assert(code);
690 jit_func = pointer_to_func(code);
691
692 if (gallivm_debug & GALLIVM_DEBUG_PERF) {
693 int64_t time_end = os_time_get();
694 int time_msec = (int)(time_end - time_begin) / 1000;
695 debug_printf(" jitting func %s took %d msec\n",
696 LLVMGetValueName(func), time_msec);
697 }
698
699 return jit_func;
700 }
701