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HLOperationLower.cpp
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HLOperationLower.cpp
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///////////////////////////////////////////////////////////////////////////////
// //
// HLOperationLower.cpp //
// Copyright (C) Microsoft Corporation. All rights reserved. //
// This file is distributed under the University of Illinois Open Source //
// License. See LICENSE.TXT for details. //
// //
// Lower functions to lower HL operations to DXIL operations. //
// //
///////////////////////////////////////////////////////////////////////////////
#define _USE_MATH_DEFINES
#include <array>
#include <cmath>
#include <functional>
#include <unordered_set>
#include "dxc/DXIL/DxilModule.h"
#include "dxc/DXIL/DxilOperations.h"
#include "dxc/DXIL/DxilResourceProperties.h"
#include "dxc/DXIL/DxilUtil.h"
#include "dxc/DXIL/DxilWaveMatrix.h"
#include "dxc/HLSL/DxilPoisonValues.h"
#include "dxc/HLSL/HLLowerUDT.h"
#include "dxc/HLSL/HLMatrixLowerHelper.h"
#include "dxc/HLSL/HLMatrixType.h"
#include "dxc/HLSL/HLModule.h"
#include "dxc/HLSL/HLOperationLower.h"
#include "dxc/HLSL/HLOperationLowerExtension.h"
#include "dxc/HLSL/HLOperations.h"
#include "dxc/HlslIntrinsicOp.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Module.h"
using namespace llvm;
using namespace hlsl;
struct HLOperationLowerHelper {
HLModule &M;
OP &hlslOP;
Type *voidTy;
Type *f32Ty;
Type *i32Ty;
Type *i16Ty;
llvm::Type *i1Ty;
Type *i8Ty;
DxilTypeSystem &dxilTypeSys;
DxilFunctionProps *functionProps;
DataLayout dataLayout;
SmallDenseMap<Type *, Type *, 4> loweredTypes;
typedef std::pair<DxilWaveMatrixProperties, Constant *> WaveMatrix_Props;
typedef DenseMap<Value *, WaveMatrix_Props> WaveMatrix_PropMap;
WaveMatrix_PropMap waveMatPropMap;
HLOperationLowerHelper(HLModule &HLM);
const WaveMatrix_Props &GetWaveMatInfo(Value *waveMatPtr);
};
HLOperationLowerHelper::HLOperationLowerHelper(HLModule &HLM)
: M(HLM), hlslOP(*HLM.GetOP()), dxilTypeSys(HLM.GetTypeSystem()),
dataLayout(DataLayout(HLM.GetHLOptions().bUseMinPrecision
? hlsl::DXIL::kLegacyLayoutString
: hlsl::DXIL::kNewLayoutString)) {
llvm::LLVMContext &Ctx = HLM.GetCtx();
voidTy = Type::getVoidTy(Ctx);
f32Ty = Type::getFloatTy(Ctx);
i32Ty = Type::getInt32Ty(Ctx);
i16Ty = Type::getInt16Ty(Ctx);
i1Ty = Type::getInt1Ty(Ctx);
i8Ty = Type::getInt8Ty(Ctx);
Function *EntryFunc = HLM.GetEntryFunction();
functionProps = nullptr;
if (HLM.HasDxilFunctionProps(EntryFunc))
functionProps = &HLM.GetDxilFunctionProps(EntryFunc);
}
const HLOperationLowerHelper::WaveMatrix_Props &
HLOperationLowerHelper::GetWaveMatInfo(Value *waveMatPtr) {
auto it = waveMatPropMap.find(waveMatPtr);
if (it == waveMatPropMap.end()) {
Constant *infoC = wavemat_helper::GetInfoConstantFromWaveMatPtr(waveMatPtr);
DxilWaveMatrixProperties info = wavemat_helper::LoadInfoFromConstant(infoC);
it = waveMatPropMap
.insert(std::make_pair(waveMatPtr, std::make_pair(info, infoC)))
.first;
}
return it->second;
}
struct HLObjectOperationLowerHelper {
private:
// For object intrinsics.
HLModule &HLM;
struct ResAttribute {
DXIL::ResourceClass RC;
DXIL::ResourceKind RK;
Type *ResourceType;
};
std::unordered_map<Value *, ResAttribute> HandleMetaMap;
std::unordered_set<Instruction *> &UpdateCounterSet;
// Map from pointer of cbuffer to pointer of resource.
// For cbuffer like this:
// cbuffer A {
// Texture2D T;
// };
// A global resource Texture2D T2 will be created for Texture2D T.
// CBPtrToResourceMap[T] will return T2.
std::unordered_map<Value *, Value *> CBPtrToResourceMap;
public:
HLObjectOperationLowerHelper(HLModule &HLM,
std::unordered_set<Instruction *> &UpdateCounter)
: HLM(HLM), UpdateCounterSet(UpdateCounter) {}
DXIL::ResourceClass GetRC(Value *Handle) {
ResAttribute &Res = FindCreateHandleResourceBase(Handle);
return Res.RC;
}
DXIL::ResourceKind GetRK(Value *Handle) {
ResAttribute &Res = FindCreateHandleResourceBase(Handle);
return Res.RK;
}
Type *GetResourceType(Value *Handle) {
ResAttribute &Res = FindCreateHandleResourceBase(Handle);
return Res.ResourceType;
}
void MarkHasCounter(Value *handle, Type *i8Ty) {
CallInst *CIHandle = cast<CallInst>(handle);
DXASSERT(hlsl::GetHLOpcodeGroup(CIHandle->getCalledFunction()) ==
HLOpcodeGroup::HLAnnotateHandle,
"else invalid handle");
// Mark has counter for the input handle.
Value *counterHandle =
CIHandle->getArgOperand(HLOperandIndex::kHandleOpIdx);
// Change kind into StructurBufferWithCounter.
Constant *Props = cast<Constant>(CIHandle->getArgOperand(
HLOperandIndex::kAnnotateHandleResourcePropertiesOpIdx));
DxilResourceProperties RP = resource_helper::loadPropsFromConstant(*Props);
RP.Basic.SamplerCmpOrHasCounter = true;
CIHandle->setArgOperand(
HLOperandIndex::kAnnotateHandleResourcePropertiesOpIdx,
resource_helper::getAsConstant(RP,
HLM.GetOP()->GetResourcePropertiesType(),
*HLM.GetShaderModel()));
DXIL::ResourceClass RC = GetRC(handle);
DXASSERT_LOCALVAR(RC, RC == DXIL::ResourceClass::UAV,
"must UAV for counter");
std::unordered_set<Value *> resSet;
MarkHasCounterOnCreateHandle(counterHandle, resSet);
}
DxilResourceBase *FindCBufferResourceFromHandle(Value *handle) {
if (CallInst *CI = dyn_cast<CallInst>(handle)) {
hlsl::HLOpcodeGroup group =
hlsl::GetHLOpcodeGroupByName(CI->getCalledFunction());
if (group == HLOpcodeGroup::HLAnnotateHandle) {
handle = CI->getArgOperand(HLOperandIndex::kHandleOpIdx);
}
}
Constant *symbol = nullptr;
if (CallInst *CI = dyn_cast<CallInst>(handle)) {
hlsl::HLOpcodeGroup group =
hlsl::GetHLOpcodeGroupByName(CI->getCalledFunction());
if (group == HLOpcodeGroup::HLCreateHandle) {
symbol = dyn_cast<Constant>(
CI->getArgOperand(HLOperandIndex::kCreateHandleResourceOpIdx));
}
}
if (!symbol)
return nullptr;
for (const std::unique_ptr<DxilCBuffer> &res : HLM.GetCBuffers()) {
if (res->GetGlobalSymbol() == symbol)
return res.get();
}
return nullptr;
}
Value *GetOrCreateResourceForCbPtr(GetElementPtrInst *CbPtr,
GlobalVariable *CbGV,
DxilResourceProperties &RP) {
// Change array idx to 0 to make sure all array ptr share same key.
Value *Key = UniformCbPtr(CbPtr, CbGV);
if (CBPtrToResourceMap.count(Key))
return CBPtrToResourceMap[Key];
Value *Resource = CreateResourceForCbPtr(CbPtr, CbGV, RP);
CBPtrToResourceMap[Key] = Resource;
return Resource;
}
Value *LowerCbResourcePtr(GetElementPtrInst *CbPtr, Value *ResPtr) {
// Simple case.
if (ResPtr->getType() == CbPtr->getType())
return ResPtr;
// Array case.
DXASSERT_NOMSG(ResPtr->getType()->getPointerElementType()->isArrayTy());
IRBuilder<> Builder(CbPtr);
gep_type_iterator GEPIt = gep_type_begin(CbPtr), E = gep_type_end(CbPtr);
Value *arrayIdx = GEPIt.getOperand();
// Only calc array idx and size.
// Ignore struct type part.
for (; GEPIt != E; ++GEPIt) {
if (GEPIt->isArrayTy()) {
arrayIdx = Builder.CreateMul(
arrayIdx, Builder.getInt32(GEPIt->getArrayNumElements()));
arrayIdx = Builder.CreateAdd(arrayIdx, GEPIt.getOperand());
}
}
return Builder.CreateGEP(ResPtr, {Builder.getInt32(0), arrayIdx});
}
DxilResourceProperties GetResPropsFromAnnotateHandle(CallInst *Anno) {
Constant *Props = cast<Constant>(Anno->getArgOperand(
HLOperandIndex::kAnnotateHandleResourcePropertiesOpIdx));
DxilResourceProperties RP = resource_helper::loadPropsFromConstant(*Props);
return RP;
}
private:
ResAttribute &FindCreateHandleResourceBase(Value *Handle) {
if (HandleMetaMap.count(Handle))
return HandleMetaMap[Handle];
// Add invalid first to avoid dead loop.
HandleMetaMap[Handle] = {
DXIL::ResourceClass::Invalid, DXIL::ResourceKind::Invalid,
StructType::get(Type::getVoidTy(HLM.GetCtx()), nullptr)};
if (CallInst *CI = dyn_cast<CallInst>(Handle)) {
hlsl::HLOpcodeGroup group =
hlsl::GetHLOpcodeGroupByName(CI->getCalledFunction());
if (group == HLOpcodeGroup::HLAnnotateHandle) {
Constant *Props = cast<Constant>(CI->getArgOperand(
HLOperandIndex::kAnnotateHandleResourcePropertiesOpIdx));
DxilResourceProperties RP =
resource_helper::loadPropsFromConstant(*Props);
Type *ResTy =
CI->getArgOperand(HLOperandIndex::kAnnotateHandleResourceTypeOpIdx)
->getType();
ResAttribute Attrib = {RP.getResourceClass(), RP.getResourceKind(),
ResTy};
HandleMetaMap[Handle] = Attrib;
return HandleMetaMap[Handle];
}
}
dxilutil::EmitErrorOnContext(Handle->getContext(),
"cannot map resource to handle.");
return HandleMetaMap[Handle];
}
CallInst *FindCreateHandle(Value *handle,
std::unordered_set<Value *> &resSet) {
// Already checked.
if (resSet.count(handle))
return nullptr;
resSet.insert(handle);
if (CallInst *CI = dyn_cast<CallInst>(handle))
return CI;
if (SelectInst *Sel = dyn_cast<SelectInst>(handle)) {
if (CallInst *CI = FindCreateHandle(Sel->getTrueValue(), resSet))
return CI;
if (CallInst *CI = FindCreateHandle(Sel->getFalseValue(), resSet))
return CI;
return nullptr;
}
if (PHINode *Phi = dyn_cast<PHINode>(handle)) {
for (unsigned i = 0; i < Phi->getNumOperands(); i++) {
if (CallInst *CI = FindCreateHandle(Phi->getOperand(i), resSet))
return CI;
}
return nullptr;
}
return nullptr;
}
void MarkHasCounterOnCreateHandle(Value *handle,
std::unordered_set<Value *> &resSet) {
// Already checked.
if (resSet.count(handle))
return;
resSet.insert(handle);
if (CallInst *CI = dyn_cast<CallInst>(handle)) {
Value *Res =
CI->getArgOperand(HLOperandIndex::kCreateHandleResourceOpIdx);
LoadInst *LdRes = dyn_cast<LoadInst>(Res);
if (LdRes) {
UpdateCounterSet.insert(LdRes);
return;
}
if (CallInst *CallRes = dyn_cast<CallInst>(Res)) {
hlsl::HLOpcodeGroup group =
hlsl::GetHLOpcodeGroup(CallRes->getCalledFunction());
if (group == HLOpcodeGroup::HLCast) {
HLCastOpcode opcode =
static_cast<HLCastOpcode>(hlsl::GetHLOpcode(CallRes));
if (opcode == HLCastOpcode::HandleToResCast) {
if (Instruction *Hdl = dyn_cast<Instruction>(
CallRes->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx)))
UpdateCounterSet.insert(Hdl);
return;
}
}
}
dxilutil::EmitErrorOnInstruction(CI, "cannot map resource to handle.");
return;
}
if (SelectInst *Sel = dyn_cast<SelectInst>(handle)) {
MarkHasCounterOnCreateHandle(Sel->getTrueValue(), resSet);
MarkHasCounterOnCreateHandle(Sel->getFalseValue(), resSet);
}
if (PHINode *Phi = dyn_cast<PHINode>(handle)) {
for (unsigned i = 0; i < Phi->getNumOperands(); i++) {
MarkHasCounterOnCreateHandle(Phi->getOperand(i), resSet);
}
}
}
Value *UniformCbPtr(GetElementPtrInst *CbPtr, GlobalVariable *CbGV) {
gep_type_iterator GEPIt = gep_type_begin(CbPtr), E = gep_type_end(CbPtr);
std::vector<Value *> idxList(CbPtr->idx_begin(), CbPtr->idx_end());
unsigned i = 0;
IRBuilder<> Builder(HLM.GetCtx());
Value *zero = Builder.getInt32(0);
for (; GEPIt != E; ++GEPIt, ++i) {
ConstantInt *ImmIdx = dyn_cast<ConstantInt>(GEPIt.getOperand());
if (!ImmIdx) {
// Remove dynamic indexing to avoid crash.
idxList[i] = zero;
}
}
Value *Key = Builder.CreateInBoundsGEP(CbGV, idxList);
return Key;
}
Value *CreateResourceForCbPtr(GetElementPtrInst *CbPtr, GlobalVariable *CbGV,
DxilResourceProperties &RP) {
Type *CbTy = CbPtr->getPointerOperandType();
DXASSERT_LOCALVAR(CbTy, CbTy == CbGV->getType(),
"else arg not point to var");
gep_type_iterator GEPIt = gep_type_begin(CbPtr), E = gep_type_end(CbPtr);
unsigned i = 0;
IRBuilder<> Builder(HLM.GetCtx());
unsigned arraySize = 1;
DxilTypeSystem &typeSys = HLM.GetTypeSystem();
std::string Name;
for (; GEPIt != E; ++GEPIt, ++i) {
if (GEPIt->isArrayTy()) {
arraySize *= GEPIt->getArrayNumElements();
if (!Name.empty())
Name += ".";
if (ConstantInt *ImmIdx = dyn_cast<ConstantInt>(GEPIt.getOperand())) {
unsigned idx = ImmIdx->getLimitedValue();
Name += std::to_string(idx);
}
} else if (GEPIt->isStructTy()) {
DxilStructAnnotation *typeAnnot =
typeSys.GetStructAnnotation(cast<StructType>(*GEPIt));
DXASSERT_NOMSG(typeAnnot);
unsigned idx = cast<ConstantInt>(GEPIt.getOperand())->getLimitedValue();
DXASSERT_NOMSG(typeAnnot->GetNumFields() > idx);
DxilFieldAnnotation &fieldAnnot = typeAnnot->GetFieldAnnotation(idx);
if (!Name.empty())
Name += ".";
Name += fieldAnnot.GetFieldName();
}
}
Type *Ty = CbPtr->getResultElementType();
// Not support resource array in cbuffer.
unsigned ResBinding =
HLM.GetBindingForResourceInCB(CbPtr, CbGV, RP.getResourceClass());
return CreateResourceGV(Ty, Name, RP, ResBinding);
}
Value *CreateResourceGV(Type *Ty, StringRef Name, DxilResourceProperties &RP,
unsigned ResBinding) {
Module &M = *HLM.GetModule();
Constant *GV = M.getOrInsertGlobal(Name, Ty);
// Create resource and set GV as globalSym.
DxilResourceBase *Res = HLM.AddResourceWithGlobalVariableAndProps(GV, RP);
DXASSERT(Res, "fail to create resource for global variable in cbuffer");
Res->SetLowerBound(ResBinding);
return GV;
}
};
// Helper for lowering resource extension methods.
struct HLObjectExtensionLowerHelper : public hlsl::HLResourceLookup {
explicit HLObjectExtensionLowerHelper(HLObjectOperationLowerHelper &ObjHelper)
: m_ObjHelper(ObjHelper) {}
virtual bool GetResourceKindName(Value *HLHandle, const char **ppName) {
DXIL::ResourceKind K = m_ObjHelper.GetRK(HLHandle);
bool Success = K != DXIL::ResourceKind::Invalid;
if (Success) {
*ppName = hlsl::GetResourceKindName(K);
}
return Success;
}
private:
HLObjectOperationLowerHelper &m_ObjHelper;
};
using IntrinsicLowerFuncTy = Value *(CallInst *CI, IntrinsicOp IOP,
DXIL::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated);
struct IntrinsicLower {
// Intrinsic opcode.
IntrinsicOp IntriOpcode;
// Lower function.
IntrinsicLowerFuncTy &LowerFunc;
// DXIL opcode if can direct map.
DXIL::OpCode DxilOpcode;
};
// IOP intrinsics.
namespace {
Value *TrivialDxilOperation(Function *dxilFunc, OP::OpCode opcode,
ArrayRef<Value *> refArgs, Type *Ty, Type *RetTy,
OP *hlslOP, IRBuilder<> &Builder) {
unsigned argNum = refArgs.size();
std::vector<Value *> args = refArgs;
if (Ty->isVectorTy()) {
Value *retVal = llvm::UndefValue::get(RetTy);
unsigned vecSize = Ty->getVectorNumElements();
for (unsigned i = 0; i < vecSize; i++) {
// Update vector args, skip known opcode arg.
for (unsigned argIdx = HLOperandIndex::kUnaryOpSrc0Idx; argIdx < argNum;
argIdx++) {
if (refArgs[argIdx]->getType()->isVectorTy()) {
Value *arg = refArgs[argIdx];
args[argIdx] = Builder.CreateExtractElement(arg, i);
}
}
Value *EltOP =
Builder.CreateCall(dxilFunc, args, hlslOP->GetOpCodeName(opcode));
retVal = Builder.CreateInsertElement(retVal, EltOP, i);
}
return retVal;
} else {
if (!RetTy->isVoidTy()) {
Value *retVal =
Builder.CreateCall(dxilFunc, args, hlslOP->GetOpCodeName(opcode));
return retVal;
} else {
// Cannot add name to void.
return Builder.CreateCall(dxilFunc, args);
}
}
}
// Generates a DXIL operation over an overloaded type (Ty), returning a
// RetTy value; when Ty is a vector, it will replicate per-element operations
// into RetTy to rebuild it.
Value *TrivialDxilOperation(OP::OpCode opcode, ArrayRef<Value *> refArgs,
Type *Ty, Type *RetTy, OP *hlslOP,
IRBuilder<> &Builder) {
Type *EltTy = Ty->getScalarType();
Function *dxilFunc = hlslOP->GetOpFunc(opcode, EltTy);
return TrivialDxilOperation(dxilFunc, opcode, refArgs, Ty, RetTy, hlslOP,
Builder);
}
Value *TrivialDxilOperation(OP::OpCode opcode, ArrayRef<Value *> refArgs,
Type *Ty, Instruction *Inst, OP *hlslOP) {
DXASSERT(refArgs.size() > 0, "else opcode isn't in signature");
DXASSERT(refArgs[0] == nullptr,
"else caller has already filled the value in");
IRBuilder<> B(Inst);
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
const_cast<llvm::Value **>(refArgs.data())[0] =
opArg; // actually stack memory from caller
return TrivialDxilOperation(opcode, refArgs, Ty, Inst->getType(), hlslOP, B);
}
Value *TrivialDxilUnaryOperationRet(OP::OpCode opcode, Value *src, Type *RetTy,
hlsl::OP *hlslOP, IRBuilder<> &Builder) {
Type *Ty = src->getType();
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
Value *args[] = {opArg, src};
return TrivialDxilOperation(opcode, args, Ty, RetTy, hlslOP, Builder);
}
Value *TrivialDxilUnaryOperation(OP::OpCode opcode, Value *src,
hlsl::OP *hlslOP, IRBuilder<> &Builder) {
return TrivialDxilUnaryOperationRet(opcode, src, src->getType(), hlslOP,
Builder);
}
Value *TrivialDxilBinaryOperation(OP::OpCode opcode, Value *src0, Value *src1,
hlsl::OP *hlslOP, IRBuilder<> &Builder) {
Type *Ty = src0->getType();
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
Value *args[] = {opArg, src0, src1};
return TrivialDxilOperation(opcode, args, Ty, Ty, hlslOP, Builder);
}
Value *TrivialDxilTrinaryOperation(OP::OpCode opcode, Value *src0, Value *src1,
Value *src2, hlsl::OP *hlslOP,
IRBuilder<> &Builder) {
Type *Ty = src0->getType();
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
Value *args[] = {opArg, src0, src1, src2};
return TrivialDxilOperation(opcode, args, Ty, Ty, hlslOP, Builder);
}
Value *TrivialUnaryOperation(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
Value *src0 = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
IRBuilder<> Builder(CI);
hlsl::OP *hlslOP = &helper.hlslOP;
Value *retVal = TrivialDxilUnaryOperationRet(opcode, src0, CI->getType(),
hlslOP, Builder);
return retVal;
}
Value *TrivialBinaryOperation(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
Value *src0 = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc0Idx);
Value *src1 = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc1Idx);
IRBuilder<> Builder(CI);
Value *binOp =
TrivialDxilBinaryOperation(opcode, src0, src1, hlslOP, Builder);
return binOp;
}
Value *TrivialTrinaryOperation(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
Value *src0 = CI->getArgOperand(HLOperandIndex::kTrinaryOpSrc0Idx);
Value *src1 = CI->getArgOperand(HLOperandIndex::kTrinaryOpSrc1Idx);
Value *src2 = CI->getArgOperand(HLOperandIndex::kTrinaryOpSrc2Idx);
IRBuilder<> Builder(CI);
Value *triOp =
TrivialDxilTrinaryOperation(opcode, src0, src1, src2, hlslOP, Builder);
return triOp;
}
Value *TrivialIsSpecialFloat(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
Value *src = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
IRBuilder<> Builder(CI);
Type *Ty = src->getType();
Type *RetTy = Type::getInt1Ty(CI->getContext());
if (Ty->isVectorTy())
RetTy = VectorType::get(RetTy, Ty->getVectorNumElements());
Constant *opArg = hlslOP->GetU32Const((unsigned)opcode);
Value *args[] = {opArg, src};
return TrivialDxilOperation(opcode, args, Ty, RetTy, hlslOP, Builder);
}
bool IsResourceGEP(GetElementPtrInst *I) {
Type *Ty = I->getType()->getPointerElementType();
Ty = dxilutil::GetArrayEltTy(Ty);
// Only mark on GEP which point to resource.
return dxilutil::IsHLSLResourceType(Ty);
}
Value *TranslateNonUniformResourceIndex(
CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper, HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
Value *V = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
Type *hdlTy = helper.hlslOP.GetHandleType();
for (User *U : CI->users()) {
if (GetElementPtrInst *I = dyn_cast<GetElementPtrInst>(U)) {
// Only mark on GEP which point to resource.
if (IsResourceGEP(I))
DxilMDHelper::MarkNonUniform(I);
} else if (CastInst *castI = dyn_cast<CastInst>(U)) {
for (User *castU : castI->users()) {
if (GetElementPtrInst *I = dyn_cast<GetElementPtrInst>(castU)) {
// Only mark on GEP which point to resource.
if (IsResourceGEP(I))
DxilMDHelper::MarkNonUniform(I);
} else if (CallInst *CI = dyn_cast<CallInst>(castU)) {
if (CI->getType() == hdlTy)
DxilMDHelper::MarkNonUniform(CI);
}
}
} else if (CallInst *CI = dyn_cast<CallInst>(U)) {
if (CI->getType() == hdlTy)
DxilMDHelper::MarkNonUniform(CI);
}
}
CI->replaceAllUsesWith(V);
return nullptr;
}
Value *TrivialBarrier(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *OP = &helper.hlslOP;
Function *dxilFunc = OP->GetOpFunc(OP::OpCode::Barrier, CI->getType());
Constant *opArg = OP->GetU32Const((unsigned)OP::OpCode::Barrier);
unsigned uglobal = static_cast<unsigned>(DXIL::BarrierMode::UAVFenceGlobal);
unsigned g = static_cast<unsigned>(DXIL::BarrierMode::TGSMFence);
unsigned t = static_cast<unsigned>(DXIL::BarrierMode::SyncThreadGroup);
// unsigned ut =
// static_cast<unsigned>(DXIL::BarrierMode::UAVFenceThreadGroup);
unsigned barrierMode = 0;
switch (IOP) {
case IntrinsicOp::IOP_AllMemoryBarrier:
barrierMode = uglobal | g;
break;
case IntrinsicOp::IOP_AllMemoryBarrierWithGroupSync:
barrierMode = uglobal | g | t;
break;
case IntrinsicOp::IOP_GroupMemoryBarrier:
barrierMode = g;
break;
case IntrinsicOp::IOP_GroupMemoryBarrierWithGroupSync:
barrierMode = g | t;
break;
case IntrinsicOp::IOP_DeviceMemoryBarrier:
barrierMode = uglobal;
break;
case IntrinsicOp::IOP_DeviceMemoryBarrierWithGroupSync:
barrierMode = uglobal | t;
break;
default:
DXASSERT(0, "invalid opcode for barrier");
break;
}
Value *src0 = OP->GetU32Const(static_cast<unsigned>(barrierMode));
Value *args[] = {opArg, src0};
IRBuilder<> Builder(CI);
Builder.CreateCall(dxilFunc, args);
return nullptr;
}
Value *TranslateD3DColorToUByte4(CallInst *CI, IntrinsicOp IOP,
OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
IRBuilder<> Builder(CI);
Value *val = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
Type *Ty = val->getType();
// Use the same scaling factor used by FXC (i.e., 255.001953)
// Excerpt from stackoverflow discussion:
// "Built-in rounding, necessary because of truncation. 0.001953 * 256 = 0.5"
Constant *toByteConst = ConstantFP::get(Ty->getScalarType(), 255.001953);
if (Ty->isVectorTy()) {
static constexpr int supportedVecElemCount = 4;
if (Ty->getVectorNumElements() == supportedVecElemCount) {
toByteConst =
ConstantVector::getSplat(supportedVecElemCount, toByteConst);
// Swizzle the input val -> val.zyxw
std::vector<int> mask{2, 1, 0, 3};
val = Builder.CreateShuffleVector(val, val, mask);
} else {
llvm_unreachable(
"Unsupported input type for intrinsic D3DColorToUByte4.");
return UndefValue::get(CI->getType());
}
}
Value *byte4 = Builder.CreateFMul(toByteConst, val);
return Builder.CreateCast(Instruction::CastOps::FPToSI, byte4, CI->getType());
}
// Returns true if pow can be implemented using Fxc's mul-only code gen pattern.
// Fxc uses the below rules when choosing mul-only code gen pattern to implement
// pow function. Rule 1: Applicable only to power values in the range
// [INT32_MIN, INT32_MAX] Rule 2: The maximum number of mul ops needed shouldn't
// exceed (2n+1) or (n+1) based on whether the power
// is a positive or a negative value. Here "n" is the number of scalar
// elements in power.
// Rule 3: Power must be an exact value.
// +----------+---------------------+------------------+
// | BaseType | IsExponentPositive | MaxMulOpsAllowed |
// +----------+---------------------+------------------+
// | float4x4 | True | 33 |
// | float4x4 | False | 17 |
// | float4x2 | True | 17 |
// | float4x2 | False | 9 |
// | float2x4 | True | 17 |
// | float2x4 | False | 9 |
// | float4 | True | 9 |
// | float4 | False | 5 |
// | float2 | True | 5 |
// | float2 | False | 3 |
// | float | True | 3 |
// | float | False | 2 |
// +----------+---------------------+------------------+
bool CanUseFxcMulOnlyPatternForPow(IRBuilder<> &Builder, Value *x, Value *pow,
int32_t &powI) {
// Applicable only when power is a literal.
if (!isa<ConstantDataVector>(pow) && !isa<ConstantFP>(pow)) {
return false;
}
// Only apply this code gen on splat values.
if (ConstantDataVector *cdv = dyn_cast<ConstantDataVector>(pow)) {
if (!hlsl::dxilutil::IsSplat(cdv)) {
return false;
}
}
APFloat powAPF = isa<ConstantDataVector>(pow)
? cast<ConstantDataVector>(pow)->getElementAsAPFloat(0)
: // should be a splat value
cast<ConstantFP>(pow)->getValueAPF();
APSInt powAPS(32, false);
bool isExact = false;
// Try converting float value of power to integer and also check if the float
// value is exact.
APFloat::opStatus status =
powAPF.convertToInteger(powAPS, APFloat::rmTowardZero, &isExact);
if (status == APFloat::opStatus::opOK && isExact) {
powI = powAPS.getExtValue();
uint32_t powU = abs(powI);
int setBitCount = 0;
int maxBitSetPos = -1;
for (int i = 0; i < 32; i++) {
if ((powU >> i) & 1) {
setBitCount++;
maxBitSetPos = i;
}
}
DXASSERT(maxBitSetPos <= 30, "msb should always be zero.");
unsigned numElem =
isa<ConstantDataVector>(pow) ? x->getType()->getVectorNumElements() : 1;
int mulOpThreshold = powI < 0 ? numElem + 1 : 2 * numElem + 1;
int mulOpNeeded = maxBitSetPos + setBitCount - 1;
return mulOpNeeded <= mulOpThreshold;
}
return false;
}
Value *TranslatePowUsingFxcMulOnlyPattern(IRBuilder<> &Builder, Value *x,
const int32_t y) {
uint32_t absY = abs(y);
// If y is zero then always return 1.
if (absY == 0) {
return ConstantFP::get(x->getType(), 1);
}
int lastSetPos = -1;
Value *result = nullptr;
Value *mul = nullptr;
for (int i = 0; i < 32; i++) {
if ((absY >> i) & 1) {
for (int j = i; j > lastSetPos; j--) {
if (!mul) {
mul = x;
} else {
mul = Builder.CreateFMul(mul, mul);
}
}
result = (result == nullptr) ? mul : Builder.CreateFMul(result, mul);
lastSetPos = i;
}
}
// Compute reciprocal for negative power values.
if (y < 0) {
Value *constOne = ConstantFP::get(x->getType(), 1);
result = Builder.CreateFDiv(constOne, result);
}
return result;
}
Value *TranslatePowImpl(hlsl::OP *hlslOP, IRBuilder<> &Builder, Value *x,
Value *y, bool isFXCCompatMode = false) {
// As applicable implement pow using only mul ops as done by Fxc.
int32_t p = 0;
if (CanUseFxcMulOnlyPatternForPow(Builder, x, y, p)) {
if (isFXCCompatMode) {
return TranslatePowUsingFxcMulOnlyPattern(Builder, x, p);
} else if (p == 2) {
// Only take care 2 for it will not affect register pressure.
return Builder.CreateFMul(x, x);
}
}
// Default to log-mul-exp pattern if previous scenarios don't apply.
// t = log(x);
Value *logX =
TrivialDxilUnaryOperation(DXIL::OpCode::Log, x, hlslOP, Builder);
// t = y * t;
Value *mulY = Builder.CreateFMul(logX, y);
// pow = exp(t);
return TrivialDxilUnaryOperation(DXIL::OpCode::Exp, mulY, hlslOP, Builder);
}
Value *TranslateAddUint64(CallInst *CI, IntrinsicOp IOP, OP::OpCode opcode,
HLOperationLowerHelper &helper,
HLObjectOperationLowerHelper *pObjHelper,
bool &Translated) {
hlsl::OP *hlslOP = &helper.hlslOP;
IRBuilder<> Builder(CI);
Value *val = CI->getArgOperand(HLOperandIndex::kUnaryOpSrc0Idx);
Type *Ty = val->getType();
VectorType *VT = dyn_cast<VectorType>(Ty);
if (!VT) {
dxilutil::EmitErrorOnInstruction(
CI, "AddUint64 can only be applied to uint2 and uint4 operands.");
return UndefValue::get(Ty);
}
unsigned size = VT->getNumElements();
if (size != 2 && size != 4) {
dxilutil::EmitErrorOnInstruction(
CI, "AddUint64 can only be applied to uint2 and uint4 operands.");
return UndefValue::get(Ty);
}
Value *op0 = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc0Idx);
Value *op1 = CI->getArgOperand(HLOperandIndex::kBinaryOpSrc1Idx);
Value *RetVal = UndefValue::get(Ty);
Function *AddC = hlslOP->GetOpFunc(DXIL::OpCode::UAddc, helper.i32Ty);
Value *opArg = Builder.getInt32(static_cast<unsigned>(DXIL::OpCode::UAddc));
for (unsigned i = 0; i < size; i += 2) {
Value *low0 = Builder.CreateExtractElement(op0, i);
Value *low1 = Builder.CreateExtractElement(op1, i);
Value *lowWithC = Builder.CreateCall(AddC, {opArg, low0, low1});
Value *low = Builder.CreateExtractValue(lowWithC, 0);
RetVal = Builder.CreateInsertElement(RetVal, low, i);
Value *carry = Builder.CreateExtractValue(lowWithC, 1);
// Ext i1 to i32
carry = Builder.CreateZExt(carry, helper.i32Ty);
Value *hi0 = Builder.CreateExtractElement(op0, i + 1);
Value *hi1 = Builder.CreateExtractElement(op1, i + 1);
Value *hi = Builder.CreateAdd(hi0, hi1);
hi = Builder.CreateAdd(hi, carry);
RetVal = Builder.CreateInsertElement(RetVal, hi, i + 1);
}
return RetVal;
}
bool IsValidLoadInput(Value *V) {
// Must be load input.
// TODO: report this error on front-end
if (!V || !isa<CallInst>(V)) {
return false;
}
CallInst *CI = cast<CallInst>(V);
// Must be immediate.
ConstantInt *opArg =
cast<ConstantInt>(CI->getArgOperand(DXIL::OperandIndex::kOpcodeIdx));
DXIL::OpCode op = static_cast<DXIL::OpCode>(opArg->getLimitedValue());
if (op != DXIL::OpCode::LoadInput) {
return false;
}
return true;
}
// Tunnel through insert/extract element and shuffle to find original source
// of scalar value, or specified element (vecIdx) of vector value.
Value *FindScalarSource(Value *src, unsigned vecIdx = 0) {
Type *srcTy = src->getType()->getScalarType();
while (src && !isa<UndefValue>(src)) {
if (src->getType()->isVectorTy()) {
if (InsertElementInst *IE = dyn_cast<InsertElementInst>(src)) {
unsigned curIdx = (unsigned)cast<ConstantInt>(IE->getOperand(2))
->getUniqueInteger()
.getLimitedValue();
src = IE->getOperand((curIdx == vecIdx) ? 1 : 0);
} else if (ShuffleVectorInst *SV = dyn_cast<ShuffleVectorInst>(src)) {
int newIdx = SV->getMaskValue(vecIdx);
if (newIdx < 0)
return UndefValue::get(srcTy);
vecIdx = (unsigned)newIdx;
src = SV->getOperand(0);
unsigned numElt = src->getType()->getVectorNumElements();
if (numElt <= vecIdx) {
vecIdx -= numElt;
src = SV->getOperand(1);
}
} else {
return UndefValue::get(srcTy); // Didn't find it.
}
} else {
if (ExtractElementInst *EE = dyn_cast<ExtractElementInst>(src)) {
vecIdx = (unsigned)cast<ConstantInt>(EE->getIndexOperand())
->getUniqueInteger()
.getLimitedValue();
src = EE->getVectorOperand();
} else if (hlsl::dxilutil::IsConvergentMarker(src)) {
src = hlsl::dxilutil::GetConvergentSource(src);
} else {
break; // Found it.
}
}
}
return src;
}
// Finds corresponding inputs, calls translation for each, and returns
// resulting vector or scalar.
// Uses functor that takes (inputElemID, rowIdx, colIdx), and returns
// translation for one input scalar.
Value *TranslateEvalHelper(
CallInst *CI, Value *val, IRBuilder<> &Builder,
std::function<Value *(Value *, Value *, Value *)> fnTranslateScalarInput) {
Type *Ty = CI->getType();
Value *result = UndefValue::get(Ty);
if (Ty->isVectorTy()) {
for (unsigned i = 0; i < Ty->getVectorNumElements(); ++i) {
Value *InputEl = FindScalarSource(val, i);
if (!IsValidLoadInput(InputEl)) {
dxilutil::EmitErrorOnInstruction(
CI, "attribute evaluation can only be done "
"on values taken directly from inputs.");
return result;
}
CallInst *loadInput = cast<CallInst>(InputEl);
Value *inputElemID =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputIDOpIdx);
Value *rowIdx =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputRowOpIdx);
Value *colIdx =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputColOpIdx);
Value *Elt = fnTranslateScalarInput(inputElemID, rowIdx, colIdx);
result = Builder.CreateInsertElement(result, Elt, i);
}
} else {
Value *InputEl = FindScalarSource(val);
if (!IsValidLoadInput(InputEl)) {
dxilutil::EmitErrorOnInstruction(CI,
"attribute evaluation can only be done "
"on values taken directly from inputs.");
return result;
}
CallInst *loadInput = cast<CallInst>(InputEl);
Value *inputElemID =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputIDOpIdx);
Value *rowIdx =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputRowOpIdx);
Value *colIdx =
loadInput->getArgOperand(DXIL::OperandIndex::kLoadInputColOpIdx);
result = fnTranslateScalarInput(inputElemID, rowIdx, colIdx);
}
return result;
}