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