src/gallium/auxiliary/gallivm/lp_bld_misc.cpp

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 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
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  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
  23  * next paragraph) shall be included in all copies or substantial portions
  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/ExecutionEngine/ExecutionEngine.h>
  40 #include <llvm/ExecutionEngine/JITEventListener.h>
  41
  42 #include "pipe/p_config.h"
  43 #include "util/u_debug.h"
  44
  45
  46 #if (defined(PIPE_OS_WINDOWS) && !defined(PIPE_CC_MSVC)) || defined(PIPE_OS_EMBDDED)
  47
  48 #include "llvm/Support/raw_ostream.h"
  49
  50 class raw_debug_ostream :
  51    public llvm::raw_ostream
  52 {
  53    uint64_t pos;
  54
  55    void write_impl(const char *Ptr, size_t Size);
  56    uint64_t current_pos() { return pos; }
  57    uint64_t current_pos() const { return pos; }
  58
  59 #if HAVE_LLVM >= 0x207
  60    uint64_t preferred_buffer_size() { return 512; }
  61 #else
  62    size_t preferred_buffer_size() { return 512; }
  63 #endif
  64 };
  65
  66
  67 void
  68 raw_debug_ostream::write_impl(const char *Ptr, size_t Size)
  69 {
  70    if (Size > 0) {
  71       char *lastPtr = (char *)&Ptr[Size];
  72       char last = *lastPtr;
  73       *lastPtr = 0;
  74       _debug_printf("%*s", Size, Ptr);
  75       *lastPtr = last;
  76       pos += Size;
  77    }
  78 }
  79
  80
  81 /**
  82  * Same as LLVMDumpValue, but through our debugging channels.
  83  */
  84 extern "C" void
  85 lp_debug_dump_value(LLVMValueRef value)
  86 {
  87    raw_debug_ostream os;
  88    llvm::unwrap(value)->print(os);
  89    os.flush();
  90 }
  91
  92
  93 #else
  94
  95
  96 extern "C" void
  97 lp_debug_dump_value(LLVMValueRef value)
  98 {
  99    LLVMDumpValue(value);
 100 }
 101
 102
 103 #endif
 104
 105
 106 /**
 107  * Register the engine with oprofile.
 108  *
 109  * This allows to see the LLVM IR function names in oprofile output.
 110  *
 111  * To actually work LLVM needs to be built with the --with-oprofile configure
 112  * option.
 113  *
 114  * Also a oprofile:oprofile user:group is necessary. Which is not created by
 115  * default on some distributions.
 116  */
 117 extern "C" void
 118 lp_register_oprofile_jit_event_listener(LLVMExecutionEngineRef EE)
 119 {
 120    llvm::unwrap(EE)->RegisterJITEventListener(llvm::createOProfileJITEventListener());
 121 }