src/gallium/auxiliary/gallivm/lp_bld_misc.cpp

   1 /**************************************************************************
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   3  * Copyright 2010 VMware, Inc.
   4  * All Rights Reserved.
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  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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  22  * The above copyright notice and this permission notice (including the
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  24  * of the Software.
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  26  **************************************************************************/
  27
  28
  29 #ifndef __STDC_LIMIT_MACROS
  30 #define __STDC_LIMIT_MACROS
  31 #endif
  32
  33 #ifndef __STDC_CONSTANT_MACROS
  34 #define __STDC_CONSTANT_MACROS
  35 #endif
  36
  37 #include <llvm-c/Core.h>
  38 #include <llvm-c/ExecutionEngine.h>
  39 #include <llvm/Target/TargetOptions.h>
  40 #include <llvm/ExecutionEngine/ExecutionEngine.h>
  41 #include <llvm/ExecutionEngine/JITEventListener.h>
  42
  43 #include "pipe/p_config.h"
  44 #include "util/u_debug.h"
  45
  46
  47 #if (defined(PIPE_OS_WINDOWS) && !defined(PIPE_CC_MSVC)) || defined(PIPE_OS_EMBDDED)
  48
  49 #include "llvm/Support/raw_ostream.h"
  50
  51 class raw_debug_ostream :
  52    public llvm::raw_ostream
  53 {
  54    uint64_t pos;
  55
  56    void write_impl(const char *Ptr, size_t Size);
  57    uint64_t current_pos() { return pos; }
  58    uint64_t current_pos() const { return pos; }
  59
  60 #if HAVE_LLVM >= 0x207
  61    uint64_t preferred_buffer_size() { return 512; }
  62 #else
  63    size_t preferred_buffer_size() { return 512; }
  64 #endif
  65 };
  66
  67
  68 void
  69 raw_debug_ostream::write_impl(const char *Ptr, size_t Size)
  70 {
  71    if (Size > 0) {
  72       char *lastPtr = (char *)&Ptr[Size];
  73       char last = *lastPtr;
  74       *lastPtr = 0;
  75       _debug_printf("%*s", Size, Ptr);
  76       *lastPtr = last;
  77       pos += Size;
  78    }
  79 }
  80
  81
  82 /**
  83  * Same as LLVMDumpValue, but through our debugging channels.
  84  */
  85 extern "C" void
  86 lp_debug_dump_value(LLVMValueRef value)
  87 {
  88    raw_debug_ostream os;
  89    llvm::unwrap(value)->print(os);
  90    os.flush();
  91 }
  92
  93
  94 #else
  95
  96
  97 extern "C" void
  98 lp_debug_dump_value(LLVMValueRef value)
  99 {
 100    LLVMDumpValue(value);
 101 }
 102
 103
 104 #endif
 105
 106
 107 /**
 108  * Register the engine with oprofile.
 109  *
 110  * This allows to see the LLVM IR function names in oprofile output.
 111  *
 112  * To actually work LLVM needs to be built with the --with-oprofile configure
 113  * option.
 114  *
 115  * Also a oprofile:oprofile user:group is necessary. Which is not created by
 116  * default on some distributions.
 117  */
 118 extern "C" void
 119 lp_register_oprofile_jit_event_listener(LLVMExecutionEngineRef EE)
 120 {
 121    llvm::unwrap(EE)->RegisterJITEventListener(llvm::createOProfileJITEventListener());
 122 }
 123
 124
 125 extern "C" void
 126 lp_set_target_options(void)
 127 {
 128 #if defined(DEBUG)
 129 #if HAVE_LLVM >= 0x0207
 130    llvm::JITEmitDebugInfo = true;
 131 #endif
 132 #endif
 133
 134 #if defined(DEBUG) || defined(PROFILE)
 135    llvm::NoFramePointerElim = true;
 136 #endif
 137
 138    llvm::NoExcessFPPrecision = false;
 139
 140    /* XXX: Investigate this */
 141 #if 0
 142    llvm::UnsafeFPMath = true;
 143 #endif
 144 }