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