src/gallium/auxiliary/gallivm/lp_bld_init.c

   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/u_simple_list.h"
  35 #include "lp_bld.h"
  36 #include "lp_bld_debug.h"
  37 #include "lp_bld_misc.h"
  38 #include "lp_bld_init.h"
  39
  40 #include <llvm-c/Analysis.h>
  41 #include <llvm-c/Transforms/Scalar.h>
  42 #include <llvm-c/BitWriter.h>
  43
  44
  45 /**
  46  * AVX is supported in:
  47  * - standard JIT from LLVM 3.2 onwards
  48  * - MC-JIT from LLVM 3.1
  49  *   - MC-JIT supports limited OSes (MacOSX and Linux)
  50  * - standard JIT in LLVM 3.1, with backports
  51  */
  52 #if defined(PIPE_ARCH_PPC_64) || defined(PIPE_ARCH_S390) || defined(PIPE_ARCH_ARM) || defined(PIPE_ARCH_AARCH64)
  53 #  define USE_MCJIT 1
  54 #  define HAVE_AVX 0
  55 #elif HAVE_LLVM >= 0x0302 || (HAVE_LLVM == 0x0301 && defined(HAVE_JIT_AVX_SUPPORT))
  56 #  define USE_MCJIT 0
  57 #  define HAVE_AVX 1
  58 #elif HAVE_LLVM == 0x0301 && (defined(PIPE_OS_LINUX) || defined(PIPE_OS_APPLE))
  59 #  define USE_MCJIT 1
  60 #  define HAVE_AVX 1
  61 #else
  62 #  define USE_MCJIT 0
  63 #  define HAVE_AVX 0
  64 #endif
  65
  66
  67 #if USE_MCJIT
  68 void LLVMLinkInMCJIT();
  69 #endif
  70
  71
  72 #ifdef DEBUG
  73 unsigned gallivm_debug = 0;
  74
  75 static const struct debug_named_value lp_bld_debug_flags[] = {
  76    { "tgsi",   GALLIVM_DEBUG_TGSI, NULL },
  77    { "ir",     GALLIVM_DEBUG_IR, NULL },
  78    { "asm",    GALLIVM_DEBUG_ASM, NULL },
  79    { "nopt",   GALLIVM_DEBUG_NO_OPT, NULL },
  80    { "perf",   GALLIVM_DEBUG_PERF, NULL },
  81    { "no_brilinear", GALLIVM_DEBUG_NO_BRILINEAR, NULL },
  82    { "no_rho_approx", GALLIVM_DEBUG_NO_RHO_APPROX, NULL },
  83    { "no_quad_lod", GALLIVM_DEBUG_NO_QUAD_LOD, NULL },
  84    { "gc",     GALLIVM_DEBUG_GC, NULL },
  85    DEBUG_NAMED_VALUE_END
  86 };
  87
  88 DEBUG_GET_ONCE_FLAGS_OPTION(gallivm_debug, "GALLIVM_DEBUG", lp_bld_debug_flags, 0)
  89 #endif
  90
  91
  92 static boolean gallivm_initialized = FALSE;
  93
  94 unsigned lp_native_vector_width;
  95
  96
  97 /*
  98  * Optimization values are:
  99  * - 0: None (-O0)
 100  * - 1: Less (-O1)
 101  * - 2: Default (-O2, -Os)
 102  * - 3: Aggressive (-O3)
 103  *
 104  * See also CodeGenOpt::Level in llvm/Target/TargetMachine.h
 105  */
 106 enum LLVM_CodeGenOpt_Level {
 107 #if HAVE_LLVM >= 0x207
 108    None,        // -O0
 109    Less,        // -O1
 110    Default,     // -O2, -Os
 111    Aggressive   // -O3
 112 #else
 113    Default,
 114    None,
 115    Aggressive
 116 #endif
 117 };
 118
 119
 120 #if HAVE_LLVM <= 0x0206
 121 /**
 122  * LLVM 2.6 permits only one ExecutionEngine to be created.  So use the
 123  * same gallivm state everywhere.
 124  */
 125 static struct gallivm_state *GlobalGallivm = NULL;
 126 #endif
 127
 128
 129 /**
 130  * Create the LLVM (optimization) pass manager and install
 131  * relevant optimization passes.
 132  * \return  TRUE for success, FALSE for failure
 133  */
 134 static boolean
 135 create_pass_manager(struct gallivm_state *gallivm)
 136 {
 137    assert(!gallivm->passmgr);
 138    assert(gallivm->target);
 139
 140    gallivm->passmgr = LLVMCreateFunctionPassManager(gallivm->provider);
 141    if (!gallivm->passmgr)
 142       return FALSE;
 143
 144    LLVMAddTargetData(gallivm->target, gallivm->passmgr);
 145
 146    if ((gallivm_debug & GALLIVM_DEBUG_NO_OPT) == 0) {
 147       /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 148        * but there are more on SVN.
 149        * TODO: Add more passes.
 150        */
 151       LLVMAddScalarReplAggregatesPass(gallivm->passmgr);
 152       LLVMAddLICMPass(gallivm->passmgr);
 153       LLVMAddCFGSimplificationPass(gallivm->passmgr);
 154       LLVMAddReassociatePass(gallivm->passmgr);
 155
 156       if (HAVE_LLVM >= 0x207 && sizeof(void*) == 4) {
 157          /* For LLVM >= 2.7 and 32-bit build, use this order of passes to
 158           * avoid generating bad code.
 159           * Test with piglit glsl-vs-sqrt-zero test.
 160           */
 161          LLVMAddConstantPropagationPass(gallivm->passmgr);
 162          LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
 163       }
 164       else {
 165          LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
 166          LLVMAddConstantPropagationPass(gallivm->passmgr);
 167       }
 168
 169       if (util_cpu_caps.has_sse4_1) {
 170          /* FIXME: There is a bug in this pass, whereby the combination
 171           * of fptosi and sitofp (necessary for trunc/floor/ceil/round
 172           * implementation) somehow becomes invalid code.
 173           */
 174          LLVMAddInstructionCombiningPass(gallivm->passmgr);
 175       }
 176       LLVMAddGVNPass(gallivm->passmgr);
 177    }
 178    else {
 179       /* We need at least this pass to prevent the backends to fail in
 180        * unexpected ways.
 181        */
 182       LLVMAddPromoteMemoryToRegisterPass(gallivm->passmgr);
 183    }
 184
 185    return TRUE;
 186 }
 187
 188
 189 /**
 190  * Free gallivm object's LLVM allocations, but not the gallivm object itself.
 191  */
 192 static void
 193 free_gallivm_state(struct gallivm_state *gallivm)
 194 {
 195 #if HAVE_LLVM >= 0x207 /* XXX or 0x208? */
 196    /* This leads to crashes w/ some versions of LLVM */
 197    LLVMModuleRef mod;
 198    char *error;
 199
 200    if (gallivm->engine && gallivm->provider)
 201       LLVMRemoveModuleProvider(gallivm->engine, gallivm->provider,
 202                                &mod, &error);
 203 #endif
 204
 205    if (gallivm->passmgr) {
 206       LLVMDisposePassManager(gallivm->passmgr);
 207    }
 208
 209 #if 0
 210    /* XXX this seems to crash with all versions of LLVM */
 211    if (gallivm->provider)
 212       LLVMDisposeModuleProvider(gallivm->provider);
 213 #endif
 214
 215    if (HAVE_LLVM >= 0x207 && gallivm->engine) {
 216       /* This will already destroy any associated module */
 217       LLVMDisposeExecutionEngine(gallivm->engine);
 218    } else {
 219       LLVMDisposeModule(gallivm->module);
 220    }
 221
 222 #if !USE_MCJIT
 223    /* Don't free the TargetData, it's owned by the exec engine */
 224 #else
 225    if (gallivm->target) {
 226       LLVMDisposeTargetData(gallivm->target);
 227    }
 228 #endif
 229
 230    /* Never free the LLVM context.
 231     */
 232 #if 0
 233    if (gallivm->context)
 234       LLVMContextDispose(gallivm->context);
 235 #endif
 236
 237    if (gallivm->builder)
 238       LLVMDisposeBuilder(gallivm->builder);
 239
 240    gallivm->engine = NULL;
 241    gallivm->target = NULL;
 242    gallivm->module = NULL;
 243    gallivm->provider = NULL;
 244    gallivm->passmgr = NULL;
 245    gallivm->context = NULL;
 246    gallivm->builder = NULL;
 247 }
 248
 249
 250 static boolean
 251 init_gallivm_engine(struct gallivm_state *gallivm)
 252 {
 253    if (1) {
 254       /* We can only create one LLVMExecutionEngine (w/ LLVM 2.6 anyway) */
 255       enum LLVM_CodeGenOpt_Level optlevel;
 256       char *error = NULL;
 257       int ret;
 258
 259       if (gallivm_debug & GALLIVM_DEBUG_NO_OPT) {
 260          optlevel = None;
 261       }
 262       else {
 263          optlevel = Default;
 264       }
 265
 266 #if HAVE_LLVM >= 0x0301
 267       ret = lp_build_create_jit_compiler_for_module(&gallivm->engine,
 268                                                     gallivm->module,
 269                                                     (unsigned) optlevel,
 270                                                     USE_MCJIT,
 271                                                     &error);
 272 #else
 273       ret = LLVMCreateJITCompiler(&gallivm->engine, gallivm->provider,
 274                                   (unsigned) optlevel, &error);
 275 #endif
 276       if (ret) {
 277          _debug_printf("%s\n", error);
 278          LLVMDisposeMessage(error);
 279          goto fail;
 280       }
 281    }
 282
 283    LLVMAddModuleProvider(gallivm->engine, gallivm->provider);//new
 284
 285 #if !USE_MCJIT
 286    gallivm->target = LLVMGetExecutionEngineTargetData(gallivm->engine);
 287    if (!gallivm->target)
 288       goto fail;
 289 #else
 290    if (0) {
 291        /*
 292         * Dump the data layout strings.
 293         */
 294
 295        LLVMTargetDataRef target = LLVMGetExecutionEngineTargetData(gallivm->engine);
 296        char *data_layout;
 297        char *engine_data_layout;
 298
 299        data_layout = LLVMCopyStringRepOfTargetData(gallivm->target);
 300        engine_data_layout = LLVMCopyStringRepOfTargetData(target);
 301
 302        if (1) {
 303           debug_printf("module target data = %s\n", data_layout);
 304           debug_printf("engine target data = %s\n", engine_data_layout);
 305        }
 306
 307        free(data_layout);
 308        free(engine_data_layout);
 309    }
 310 #endif
 311
 312    return TRUE;
 313
 314 fail:
 315    return FALSE;
 316 }
 317
 318
 319 /**
 320  * Singleton
 321  *
 322  * We must never free LLVM contexts, because LLVM has several global caches
 323  * which pointing/derived from objects owned by the context, causing false
 324  * memory leaks and false cache hits when these objects are destroyed.
 325  *
 326  * TODO: For thread safety on multi-threaded OpenGL we should use one LLVM
 327  * context per thread, and put them in a pool when threads are destroyed.
 328  */
 329 static LLVMContextRef gallivm_context = NULL;
 330
 331
 332 /**
 333  * Allocate gallivm LLVM objects.
 334  * \return  TRUE for success, FALSE for failure
 335  */
 336 static boolean
 337 init_gallivm_state(struct gallivm_state *gallivm)
 338 {
 339    assert(!gallivm->context);
 340    assert(!gallivm->module);
 341    assert(!gallivm->provider);
 342
 343    lp_build_init();
 344
 345    if (!gallivm_context) {
 346       gallivm_context = LLVMContextCreate();
 347    }
 348    gallivm->context = gallivm_context;
 349    if (!gallivm->context)
 350       goto fail;
 351
 352    gallivm->module = LLVMModuleCreateWithNameInContext("gallivm",
 353                                                        gallivm->context);
 354    if (!gallivm->module)
 355       goto fail;
 356
 357    gallivm->provider =
 358       LLVMCreateModuleProviderForExistingModule(gallivm->module);
 359    if (!gallivm->provider)
 360       goto fail;
 361
 362    gallivm->builder = LLVMCreateBuilderInContext(gallivm->context);
 363    if (!gallivm->builder)
 364       goto fail;
 365
 366    /* FIXME: MC-JIT only allows compiling one module at a time, and it must be
 367     * complete when MC-JIT is created. So defer the MC-JIT engine creation for
 368     * now.
 369     */
 370 #if !USE_MCJIT
 371    if (!init_gallivm_engine(gallivm)) {
 372       goto fail;
 373    }
 374 #else
 375    /*
 376     * MC-JIT engine compiles the module immediately on creation, so we can't
 377     * obtain the target data from it.  Instead we create a target data layout
 378     * from a string.
 379     *
 380     * The produced layout strings are not precisely the same, but should make
 381     * no difference for the kind of optimization passes we run.
 382     *
 383     * For reference this is the layout string on x64:
 384     *
 385     *   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
 386     *
 387     * See also:
 388     * - http://llvm.org/docs/LangRef.html#datalayout
 389     */
 390
 391    {
 392       const unsigned pointer_size = 8 * sizeof(void *);
 393       char layout[512];
 394       util_snprintf(layout, sizeof layout, "%c-p:%u:%u:%u-i64:64:64-a0:0:%u-s0:%u:%u",
 395 #ifdef PIPE_ARCH_LITTLE_ENDIAN
 396                     'e', // little endian
 397 #else
 398                     'E', // big endian
 399 #endif
 400                     pointer_size, pointer_size, pointer_size, // pointer size, abi alignment, preferred alignment
 401                     pointer_size, // aggregate preferred alignment
 402                     pointer_size, pointer_size); // stack objects abi alignment, preferred alignment
 403
 404       gallivm->target = LLVMCreateTargetData(layout);
 405       if (!gallivm->target) {
 406          return FALSE;
 407       }
 408    }
 409 #endif
 410
 411    if (!create_pass_manager(gallivm))
 412       goto fail;
 413
 414    return TRUE;
 415
 416 fail:
 417    free_gallivm_state(gallivm);
 418    return FALSE;
 419 }
 420
 421
 422 void
 423 lp_build_init(void)
 424 {
 425    if (gallivm_initialized)
 426       return;
 427
 428 #ifdef DEBUG
 429    gallivm_debug = debug_get_option_gallivm_debug();
 430 #endif
 431
 432    lp_set_target_options();
 433
 434 #if USE_MCJIT
 435    LLVMLinkInMCJIT();
 436 #else
 437    LLVMLinkInJIT();
 438 #endif
 439
 440    util_cpu_detect();
 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 (HAVE_AVX &&
 450        util_cpu_caps.has_avx &&
 451        util_cpu_caps.has_intel) {
 452       lp_native_vector_width = 256;
 453    } else {
 454       /* Leave it at 128, even when no SIMD extensions are available.
 455        * Really needs to be a multiple of 128 so can fit 4 floats.
 456        */
 457       lp_native_vector_width = 128;
 458    }
 459
 460    lp_native_vector_width = debug_get_num_option("LP_NATIVE_VECTOR_WIDTH",
 461                                                  lp_native_vector_width);
 462
 463    if (lp_native_vector_width <= 128) {
 464       /* Hide AVX support, as often LLVM AVX intrinsics are only guarded by
 465        * "util_cpu_caps.has_avx" predicate, and lack the
 466        * "lp_native_vector_width > 128" predicate. And also to ensure a more
 467        * consistent behavior, allowing one to test SSE2 on AVX machines.
 468        * XXX: should not play games with util_cpu_caps directly as it might
 469        * get used for other things outside llvm too.
 470        */
 471       util_cpu_caps.has_avx = 0;
 472       util_cpu_caps.has_avx2 = 0;
 473    }
 474
 475    if (!HAVE_AVX) {
 476       /*
 477        * note these instructions are VEX-only, so can only emit if we use
 478        * avx (don't want to base it on has_avx & has_f16c later as that would
 479        * omit it unnecessarily on amd cpus, see above).
 480        */
 481       util_cpu_caps.has_f16c = 0;
 482       util_cpu_caps.has_xop = 0;
 483    }
 484
 485 #ifdef PIPE_ARCH_PPC_64
 486    /* Set the NJ bit in VSCR to 0 so denormalized values are handled as
 487     * specified by IEEE standard (PowerISA 2.06 - Section 6.3). This guarantees
 488     * that some rounding and half-float to float handling does not round
 489     * incorrectly to 0.
 490     * XXX: should eventually follow same logic on all platforms.
 491     * Right now denorms get explicitly disabled (but elsewhere) for x86,
 492     * whereas ppc64 explicitly enables them...
 493     */
 494    if (util_cpu_caps.has_altivec) {
 495       unsigned short mask[] = { 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
 496                                 0xFFFF, 0xFFFF, 0xFFFE, 0xFFFF };
 497       __asm (
 498         "mfvscr %%v1\n"
 499         "vand   %0,%%v1,%0\n"
 500         "mtvscr %0"
 501         :
 502         : "r" (*mask)
 503       );
 504    }
 505 #endif
 506
 507    gallivm_initialized = TRUE;
 508
 509 #if 0
 510    /* For simulating less capable machines */
 511    util_cpu_caps.has_sse3 = 0;
 512    util_cpu_caps.has_ssse3 = 0;
 513    util_cpu_caps.has_sse4_1 = 0;
 514    util_cpu_caps.has_avx = 0;
 515    util_cpu_caps.has_f16c = 0;
 516 #endif
 517 }
 518
 519
 520
 521 /**
 522  * Create a new gallivm_state object.
 523  * Note that we return a singleton.
 524  */
 525 struct gallivm_state *
 526 gallivm_create(void)
 527 {
 528    struct gallivm_state *gallivm;
 529
 530 #if HAVE_LLVM <= 0x206
 531    if (GlobalGallivm) {
 532       return GlobalGallivm;
 533    }
 534 #endif
 535
 536    gallivm = CALLOC_STRUCT(gallivm_state);
 537    if (gallivm) {
 538       if (!init_gallivm_state(gallivm)) {
 539          FREE(gallivm);
 540          gallivm = NULL;
 541       }
 542    }
 543
 544 #if HAVE_LLVM <= 0x206
 545    GlobalGallivm = gallivm;
 546 #endif
 547
 548    return gallivm;
 549 }
 550
 551
 552 /**
 553  * Destroy a gallivm_state object.
 554  */
 555 void
 556 gallivm_destroy(struct gallivm_state *gallivm)
 557 {
 558 #if HAVE_LLVM <= 0x0206
 559    /* No-op: don't destroy the singleton */
 560    (void) gallivm;
 561 #else
 562    free_gallivm_state(gallivm);
 563    FREE(gallivm);
 564 #endif
 565 }
 566
 567
 568 /**
 569  * Validate and optimze a function.
 570  */
 571 static void
 572 gallivm_optimize_function(struct gallivm_state *gallivm,
 573                           LLVMValueRef func)
 574 {
 575    if (0) {
 576       debug_printf("optimizing %s...\n", LLVMGetValueName(func));
 577    }
 578
 579    assert(gallivm->passmgr);
 580
 581    /* Apply optimizations to LLVM IR */
 582    LLVMRunFunctionPassManager(gallivm->passmgr, func);
 583
 584    if (0) {
 585       if (gallivm_debug & GALLIVM_DEBUG_IR) {
 586          /* Print the LLVM IR to stderr */
 587          lp_debug_dump_value(func);
 588          debug_printf("\n");
 589       }
 590    }
 591 }
 592
 593
 594 /**
 595  * Validate a function.
 596  */
 597 void
 598 gallivm_verify_function(struct gallivm_state *gallivm,
 599                         LLVMValueRef func)
 600 {
 601    /* Verify the LLVM IR.  If invalid, dump and abort */
 602 #ifdef DEBUG
 603    if (LLVMVerifyFunction(func, LLVMPrintMessageAction)) {
 604       lp_debug_dump_value(func);
 605       assert(0);
 606       return;
 607    }
 608 #endif
 609
 610    gallivm_optimize_function(gallivm, func);
 611
 612    if (gallivm_debug & GALLIVM_DEBUG_IR) {
 613       /* Print the LLVM IR to stderr */
 614       lp_debug_dump_value(func);
 615       debug_printf("\n");
 616    }
 617 }
 618
 619
 620 void
 621 gallivm_compile_module(struct gallivm_state *gallivm)
 622 {
 623 #if HAVE_LLVM > 0x206
 624    assert(!gallivm->compiled);
 625 #endif
 626
 627    /* Dump byte code to a file */
 628    if (0) {
 629       LLVMWriteBitcodeToFile(gallivm->module, "llvmpipe.bc");
 630       debug_printf("llvmpipe.bc written\n");
 631       debug_printf("Invoke as \"llc -o - llvmpipe.bc\"\n");
 632    }
 633
 634 #if USE_MCJIT
 635    assert(!gallivm->engine);
 636    if (!init_gallivm_engine(gallivm)) {
 637       assert(0);
 638    }
 639 #endif
 640    assert(gallivm->engine);
 641
 642    ++gallivm->compiled;
 643 }
 644
 645
 646
 647 func_pointer
 648 gallivm_jit_function(struct gallivm_state *gallivm,
 649                      LLVMValueRef func)
 650 {
 651    void *code;
 652    func_pointer jit_func;
 653
 654    assert(gallivm->compiled);
 655    assert(gallivm->engine);
 656
 657    code = LLVMGetPointerToGlobal(gallivm->engine, func);
 658    assert(code);
 659    jit_func = pointer_to_func(code);
 660
 661    if (gallivm_debug & GALLIVM_DEBUG_ASM) {
 662       lp_disassemble(func, code);
 663    }
 664
 665 #if defined(PROFILE)
 666    lp_profile(func, code);
 667 #endif
 668
 669    /* Free the function body to save memory */
 670    lp_func_delete_body(func);
 671
 672    return jit_func;
 673 }
 674
 675
 676 /**
 677  * Free the function (and its machine code).
 678  */
 679 void
 680 gallivm_free_function(struct gallivm_state *gallivm,
 681                       LLVMValueRef func,
 682                       const void *code)
 683 {
 684 #if !USE_MCJIT
 685    if (code) {
 686       LLVMFreeMachineCodeForFunction(gallivm->engine, func);
 687    }
 688
 689    LLVMDeleteFunction(func);
 690 #endif
 691 }