src/gallium/drivers/llvmpipe/lp_jit.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  27
  28 /**
  29  * @file
  30  * C - JIT interfaces
  31  *
  32  * @author Jose Fonseca <jfonseca@vmware.com>
  33  */
  34
  35
  36 #include <llvm-c/Transforms/Scalar.h>
  37
  38 #include "util/u_memory.h"
  39 #include "lp_screen.h"
  40 #include "lp_jit.h"
  41
  42
  43 static void
  44 lp_jit_init_types(struct llvmpipe_screen *screen)
  45 {
  46    /* struct lp_jit_context */
  47    {
  48       LLVMTypeRef elem_types[2];
  49       LLVMTypeRef context_type;
  50
  51       elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* constants */
  52       elem_types[1] = LLVMPointerType(LLVMInt8Type(), 0);  /* samplers */
  53
  54       context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
  55
  56       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, constants,
  57                              screen->target, context_type, 0);
  58       LP_CHECK_MEMBER_OFFSET(struct lp_jit_context, samplers,
  59                              screen->target, context_type, 1);
  60       LP_CHECK_STRUCT_SIZE(struct lp_jit_context,
  61                            screen->target, context_type);
  62
  63       LLVMAddTypeName(screen->module, "context", context_type);
  64
  65       screen->context_ptr_type = LLVMPointerType(context_type, 0);
  66    }
  67
  68 #ifdef DEBUG
  69    LLVMDumpModule(screen->module);
  70 #endif
  71 }
  72
  73
  74 void
  75 lp_jit_screen_cleanup(struct llvmpipe_screen *screen)
  76 {
  77    if(screen->engine)
  78       LLVMDisposeExecutionEngine(screen->engine);
  79
  80    if(screen->pass)
  81       LLVMDisposePassManager(screen->pass);
  82 }
  83
  84
  85 void
  86 lp_jit_screen_init(struct llvmpipe_screen *screen)
  87 {
  88    char *error = NULL;
  89
  90    screen->module = LLVMModuleCreateWithName("llvmpipe");
  91
  92    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
  93
  94    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
  95       fprintf(stderr, "%s\n", error);
  96       LLVMDisposeMessage(error);
  97       abort();
  98    }
  99
 100    screen->target = LLVMGetExecutionEngineTargetData(screen->engine);
 101
 102    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 103    LLVMAddTargetData(screen->target, screen->pass);
 104    /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 105     * but there are more on SVN. */
 106    LLVMAddConstantPropagationPass(screen->pass);
 107    LLVMAddInstructionCombiningPass(screen->pass);
 108    LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 109    LLVMAddGVNPass(screen->pass);
 110    LLVMAddCFGSimplificationPass(screen->pass);
 111
 112    lp_jit_init_types(screen);
 113 }