src/gallium/auxiliary/gallivm/lp_bld_misc.cpp

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   3  * Copyright 2010 VMware, Inc.
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  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 #include <llvm/Support/CommandLine.h>
  43 #include <llvm/Support/PrettyStackTrace.h>
  44
  45 #include "pipe/p_config.h"
  46 #include "util/u_debug.h"
  47
  48
  49 /**
  50  * Register the engine with oprofile.
  51  *
  52  * This allows to see the LLVM IR function names in oprofile output.
  53  *
  54  * To actually work LLVM needs to be built with the --with-oprofile configure
  55  * option.
  56  *
  57  * Also a oprofile:oprofile user:group is necessary. Which is not created by
  58  * default on some distributions.
  59  */
  60 extern "C" void
  61 lp_register_oprofile_jit_event_listener(LLVMExecutionEngineRef EE)
  62 {
  63    llvm::unwrap(EE)->RegisterJITEventListener(llvm::createOProfileJITEventListener());
  64 }
  65
  66
  67 extern "C" void
  68 lp_set_target_options(void)
  69 {
  70 #if defined(DEBUG)
  71 #if HAVE_LLVM >= 0x0207
  72    llvm::JITEmitDebugInfo = true;
  73 #endif
  74 #endif
  75
  76 #if defined(DEBUG) || defined(PROFILE)
  77    llvm::NoFramePointerElim = true;
  78 #endif
  79
  80    llvm::NoExcessFPPrecision = false;
  81
  82    /* XXX: Investigate this */
  83 #if 0
  84    llvm::UnsafeFPMath = true;
  85 #endif
  86
  87 #if HAVE_LLVM < 0x0209
  88    /*
  89     * LLVM will generate MMX instructions for vectors <= 64 bits, leading to
  90     * innefficient code, and in 32bit systems, to the corruption of the FPU
  91     * stack given that it expects the user to generate the EMMS instructions.
  92     *
  93     * See also:
  94     * - http://llvm.org/bugs/show_bug.cgi?id=3287
  95     * - http://l4.me.uk/post/2009/06/07/llvm-wrinkle-3-configuration-what-configuration/
  96     */
  97    static boolean first = TRUE;
  98    if (first) {
  99       static const char* options[] = {
 100          "prog",
 101          "-disable-mmx"
 102       };
 103       llvm::cl::ParseCommandLineOptions(2, const_cast<char**>(options));
 104       first = FALSE;
 105    }
 106 #endif
 107
 108    /*
 109     * By default LLVM adds a signal handler to output a pretty stack trace.
 110     * This signal handler is never removed, causing problems when unloading the
 111     * shared object where the gallium driver resides.
 112     */
 113    llvm::DisablePrettyStackTrace = true;
 114 }
 115
 116
 117 extern "C" void
 118 lp_func_delete_body(LLVMValueRef FF)
 119 {
 120    llvm::Function *func = llvm::unwrap<llvm::Function>(FF);
 121    func->deleteBody();
 122 }
 123
 124
 125 extern "C"
 126 LLVMValueRef
 127 lp_build_load_volatile(LLVMBuilderRef B, LLVMValueRef PointerVal,
 128                        const char *Name)
 129 {
 130    return llvm::wrap(llvm::unwrap(B)->CreateLoad(llvm::unwrap(PointerVal), true, Name));
 131 }
 132