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_compiler.h"
  30 #include "util/u_cpu_detect.h"
  31 #include "util/u_debug.h"
  32 #include "lp_bld_debug.h"
  33 #include "lp_bld_init.h"
  34
  35 #include <llvm-c/Transforms/Scalar.h>
  36
  37
  38 #ifdef DEBUG
  39 unsigned gallivm_debug = 0;
  40
  41 static const struct debug_named_value lp_bld_debug_flags[] = {
  42    { "tgsi",   GALLIVM_DEBUG_TGSI, NULL },
  43    { "ir",     GALLIVM_DEBUG_IR, NULL },
  44    { "asm",    GALLIVM_DEBUG_ASM, NULL },
  45    { "nopt",   GALLIVM_DEBUG_NO_OPT, NULL },
  46    { "perf",   GALLIVM_DEBUG_PERF, NULL },
  47    DEBUG_NAMED_VALUE_END
  48 };
  49
  50 DEBUG_GET_ONCE_FLAGS_OPTION(gallivm_debug, "GALLIVM_DEBUG", lp_bld_debug_flags, 0)
  51 #endif
  52
  53
  54 LLVMModuleRef lp_build_module = NULL;
  55 LLVMExecutionEngineRef lp_build_engine = NULL;
  56 LLVMModuleProviderRef lp_build_provider = NULL;
  57 LLVMTargetDataRef lp_build_target = NULL;
  58 LLVMPassManagerRef lp_build_pass = NULL;
  59
  60
  61 /*
  62  * Optimization values are:
  63  * - 0: None (-O0)
  64  * - 1: Less (-O1)
  65  * - 2: Default (-O2, -Os)
  66  * - 3: Aggressive (-O3)
  67  *
  68  * See also CodeGenOpt::Level in llvm/Target/TargetMachine.h
  69  */
  70 enum LLVM_CodeGenOpt_Level {
  71 #if HAVE_LLVM >= 0x207
  72    None,        // -O0
  73    Less,        // -O1
  74    Default,     // -O2, -Os
  75    Aggressive   // -O3
  76 #else
  77    Default,
  78    None,
  79    Aggressive
  80 #endif
  81 };
  82
  83
  84 extern void
  85 lp_register_oprofile_jit_event_listener(LLVMExecutionEngineRef EE);
  86
  87 extern void
  88 lp_set_target_options(void);
  89
  90
  91 void
  92 lp_build_init(void)
  93 {
  94 #ifdef DEBUG
  95    gallivm_debug = debug_get_option_gallivm_debug();
  96 #endif
  97
  98    lp_set_target_options();
  99
 100    LLVMInitializeNativeTarget();
 101
 102    LLVMLinkInJIT();
 103
 104    if (!lp_build_module)
 105       lp_build_module = LLVMModuleCreateWithName("gallivm");
 106
 107    if (!lp_build_provider)
 108       lp_build_provider = LLVMCreateModuleProviderForExistingModule(lp_build_module);
 109
 110    if (!lp_build_engine) {
 111       enum LLVM_CodeGenOpt_Level optlevel;
 112       char *error = NULL;
 113
 114       if (gallivm_debug & GALLIVM_DEBUG_NO_OPT) {
 115          optlevel = None;
 116       }
 117       else {
 118          optlevel = Default;
 119       }
 120
 121       if (LLVMCreateJITCompiler(&lp_build_engine, lp_build_provider,
 122                                 (unsigned)optlevel, &error)) {
 123          _debug_printf("%s\n", error);
 124          LLVMDisposeMessage(error);
 125          assert(0);
 126       }
 127
 128 #if defined(DEBUG) || defined(PROFILE)
 129       lp_register_oprofile_jit_event_listener(lp_build_engine);
 130 #endif
 131    }
 132
 133    if (!lp_build_target)
 134       lp_build_target = LLVMGetExecutionEngineTargetData(lp_build_engine);
 135
 136    if (!lp_build_pass) {
 137       lp_build_pass = LLVMCreateFunctionPassManager(lp_build_provider);
 138       LLVMAddTargetData(lp_build_target, lp_build_pass);
 139
 140       if ((gallivm_debug & GALLIVM_DEBUG_NO_OPT) == 0) {
 141          /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 142           * but there are more on SVN. */
 143          /* TODO: Add more passes */
 144          LLVMAddCFGSimplificationPass(lp_build_pass);
 145          LLVMAddPromoteMemoryToRegisterPass(lp_build_pass);
 146          LLVMAddConstantPropagationPass(lp_build_pass);
 147          if(util_cpu_caps.has_sse4_1) {
 148             /* FIXME: There is a bug in this pass, whereby the combination of fptosi
 149              * and sitofp (necessary for trunc/floor/ceil/round implementation)
 150              * somehow becomes invalid code.
 151              */
 152             LLVMAddInstructionCombiningPass(lp_build_pass);
 153          }
 154          LLVMAddGVNPass(lp_build_pass);
 155       } else {
 156          /* We need at least this pass to prevent the backends to fail in
 157           * unexpected ways.
 158           */
 159          LLVMAddPromoteMemoryToRegisterPass(lp_build_pass);
 160       }
 161    }
 162
 163    util_cpu_detect();
 164
 165 #if 0
 166    /* For simulating less capable machines */
 167    util_cpu_caps.has_sse3 = 0;
 168    util_cpu_caps.has_ssse3 = 0;
 169    util_cpu_caps.has_sse4_1 = 0;
 170 #endif
 171 }
 172
 173
 174 /*
 175  * Hack to allow the linking of release LLVM static libraries on a debug build.
 176  *
 177  * See also:
 178  * - http://social.msdn.microsoft.com/Forums/en-US/vclanguage/thread/7234ea2b-0042-42ed-b4e2-5d8644dfb57d
 179  */
 180 #if defined(_MSC_VER) && defined(_DEBUG)
 181 #include <crtdefs.h>
 182 _CRTIMP void __cdecl
 183 _invalid_parameter_noinfo(void) {}
 184 #endif