src/gallium/drivers/swr/rasterizer/jitter/builder.cpp

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  23  * @file builder.h
  24  *
  25  * @brief Includes all the builder related functionality
  26  *
  27  * Notes:
  28  *
  29  ******************************************************************************/
  30
  31 #include "jit_pch.hpp"
  32 #include "builder.h"
  33
  34 namespace SwrJit
  35 {
  36     using namespace llvm;
  37
  38     //////////////////////////////////////////////////////////////////////////
  39     /// @brief Contructor for Builder.
  40     /// @param pJitMgr - JitManager which contains modules, function passes, etc.
  41     Builder::Builder(JitManager* pJitMgr) : mpJitMgr(pJitMgr), mpPrivateContext(nullptr)
  42     {
  43         mVWidth   = pJitMgr->mVWidth;
  44         mVWidth16 = 16;
  45
  46         mpIRBuilder = &pJitMgr->mBuilder;
  47
  48         // Built in types: scalar
  49
  50         mVoidTy     = Type::getVoidTy(pJitMgr->mContext);
  51         mFP16Ty     = Type::getHalfTy(pJitMgr->mContext);
  52         mFP32Ty     = Type::getFloatTy(pJitMgr->mContext);
  53         mFP32PtrTy  = PointerType::get(mFP32Ty, 0);
  54         mDoubleTy   = Type::getDoubleTy(pJitMgr->mContext);
  55         mInt1Ty     = Type::getInt1Ty(pJitMgr->mContext);
  56         mInt8Ty     = Type::getInt8Ty(pJitMgr->mContext);
  57         mInt16Ty    = Type::getInt16Ty(pJitMgr->mContext);
  58         mInt32Ty    = Type::getInt32Ty(pJitMgr->mContext);
  59         mInt64Ty    = Type::getInt64Ty(pJitMgr->mContext);
  60         mInt8PtrTy  = PointerType::get(mInt8Ty, 0);
  61         mInt16PtrTy = PointerType::get(mInt16Ty, 0);
  62         mInt32PtrTy = PointerType::get(mInt32Ty, 0);
  63         mInt64PtrTy = PointerType::get(mInt64Ty, 0);
  64
  65         mSimd4FP64Ty = VectorType::get(mDoubleTy, 4);
  66
  67         // Built in types: target simd
  68         SetTargetWidth(pJitMgr->mVWidth);
  69
  70         // Built in types: simd16
  71
  72         mSimd16Int1Ty     = VectorType::get(mInt1Ty, mVWidth16);
  73         mSimd16Int16Ty    = VectorType::get(mInt16Ty, mVWidth16);
  74         mSimd16Int32Ty    = VectorType::get(mInt32Ty, mVWidth16);
  75         mSimd16Int64Ty    = VectorType::get(mInt64Ty, mVWidth16);
  76         mSimd16FP16Ty     = VectorType::get(mFP16Ty, mVWidth16);
  77         mSimd16FP32Ty     = VectorType::get(mFP32Ty, mVWidth16);
  78         mSimd16VectorTy   = ArrayType::get(mSimd16FP32Ty, 4);
  79         mSimd16VectorTRTy = ArrayType::get(mSimd16FP32Ty, 5);
  80
  81         mSimd32Int8Ty = VectorType::get(mInt8Ty, 32);
  82
  83         if (sizeof(uint32_t*) == 4)
  84         {
  85             mIntPtrTy       = mInt32Ty;
  86             mSimdIntPtrTy   = mSimdInt32Ty;
  87             mSimd16IntPtrTy = mSimd16Int32Ty;
  88         }
  89         else
  90         {
  91             SWR_ASSERT(sizeof(uint32_t*) == 8);
  92
  93             mIntPtrTy       = mInt64Ty;
  94             mSimdIntPtrTy   = mSimdInt64Ty;
  95             mSimd16IntPtrTy = mSimd16Int64Ty;
  96         }
  97     }
  98
  99     void Builder::SetTargetWidth(uint32_t width)
 100     {
 101         mVWidth = width;
 102
 103         mSimdInt1Ty      = VectorType::get(mInt1Ty, mVWidth);
 104         mSimdInt16Ty     = VectorType::get(mInt16Ty, mVWidth);
 105         mSimdInt32Ty     = VectorType::get(mInt32Ty, mVWidth);
 106         mSimdInt64Ty     = VectorType::get(mInt64Ty, mVWidth);
 107         mSimdFP16Ty      = VectorType::get(mFP16Ty, mVWidth);
 108         mSimdFP32Ty      = VectorType::get(mFP32Ty, mVWidth);
 109         mSimdVectorTy    = ArrayType::get(mSimdFP32Ty, 4);
 110         mSimdVectorIntTy = ArrayType::get(mSimdInt32Ty, 4);
 111         mSimdVectorTRTy  = ArrayType::get(mSimdFP32Ty, 5);
 112     }
 113
 114     /// @brief Mark this alloca as temporary to avoid hoisting later on
 115     void Builder::SetTempAlloca(Value* inst)
 116     {
 117         AllocaInst* pAlloca = dyn_cast<AllocaInst>(inst);
 118         SWR_ASSERT(pAlloca, "Unexpected non-alloca instruction");
 119         MDNode* N = MDNode::get(JM()->mContext, MDString::get(JM()->mContext, "is_temp_alloca"));
 120         pAlloca->setMetadata("is_temp_alloca", N);
 121     }
 122
 123     bool Builder::IsTempAlloca(Value* inst)
 124     {
 125         AllocaInst* pAlloca = dyn_cast<AllocaInst>(inst);
 126         SWR_ASSERT(pAlloca, "Unexpected non-alloca instruction");
 127
 128         return (pAlloca->getMetadata("is_temp_alloca") != nullptr);
 129     }
 130
 131     // Returns true if able to find a call instruction to mark
 132     bool Builder::SetNamedMetaDataOnCallInstr(Instruction* inst, StringRef mdName)
 133     {
 134         CallInst* pCallInstr = dyn_cast<CallInst>(inst);
 135         if (pCallInstr)
 136         {
 137             MDNode* N = MDNode::get(JM()->mContext, MDString::get(JM()->mContext, mdName));
 138             pCallInstr->setMetadata(mdName, N);
 139             return true;
 140         }
 141         else
 142         {
 143             // Follow use def chain back up
 144             for (Use& u : inst->operands())
 145             {
 146                 Instruction* srcInst = dyn_cast<Instruction>(u.get());
 147                 if (srcInst)
 148                 {
 149                     if (SetNamedMetaDataOnCallInstr(srcInst, mdName))
 150                     {
 151                         return true;
 152                     }
 153                 }
 154             }
 155         }
 156
 157         return false;
 158     }
 159
 160     bool Builder::HasNamedMetaDataOnCallInstr(Instruction* inst, StringRef mdName)
 161     {
 162         CallInst* pCallInstr = dyn_cast<CallInst>(inst);
 163
 164         if (!pCallInstr)
 165         {
 166             return false;
 167         }
 168
 169         return (pCallInstr->getMetadata(mdName) != nullptr);
 170     }
 171
 172     //////////////////////////////////////////////////////////////////////////
 173     /// @brief Packetizes the type. Assumes SOA conversion.
 174     Type* Builder::GetVectorType(Type* pType)
 175     {
 176         if (pType->isVectorTy())
 177         {
 178             return pType;
 179         }
 180
 181         // [N x float] should packetize to [N x <8 x float>]
 182         if (pType->isArrayTy())
 183         {
 184             uint32_t arraySize     = pType->getArrayNumElements();
 185             Type*    pArrayType    = pType->getArrayElementType();
 186             Type*    pVecArrayType = GetVectorType(pArrayType);
 187             Type*    pVecType      = ArrayType::get(pVecArrayType, arraySize);
 188             return pVecType;
 189         }
 190
 191         // {float,int} should packetize to {<8 x float>, <8 x int>}
 192         if (pType->isAggregateType())
 193         {
 194             uint32_t              numElems = pType->getStructNumElements();
 195             SmallVector<Type*, 8> vecTypes;
 196             for (uint32_t i = 0; i < numElems; ++i)
 197             {
 198                 Type* pElemType    = pType->getStructElementType(i);
 199                 Type* pVecElemType = GetVectorType(pElemType);
 200                 vecTypes.push_back(pVecElemType);
 201             }
 202             Type* pVecType = StructType::get(JM()->mContext, vecTypes);
 203             return pVecType;
 204         }
 205
 206         // [N x float]* should packetize to [N x <8 x float>]*
 207         if (pType->isPointerTy() && pType->getPointerElementType()->isArrayTy())
 208         {
 209             return PointerType::get(GetVectorType(pType->getPointerElementType()),
 210                                     pType->getPointerAddressSpace());
 211         }
 212
 213         // <ty> should packetize to <8 x <ty>>
 214         Type* vecType = VectorType::get(pType, JM()->mVWidth);
 215         return vecType;
 216     }
 217 } // namespace SwrJit