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