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SPIRVWriter.cpp
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SPIRVWriter.cpp
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//===- SPIRVWriter.cpp - Converts LLVM to SPIR-V ----------------*- C++ -*-===//
//
// The LLVM/SPIR-V Translator
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
// Copyright (c) 2014 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal with the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimers.
// Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimers in the documentation
// and/or other materials provided with the distribution.
// Neither the names of Advanced Micro Devices, Inc., nor the names of its
// contributors may be used to endorse or promote products derived from this
// Software without specific prior written permission.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH
// THE SOFTWARE.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file implements conversion of LLVM intermediate language to SPIR-V
/// binary.
///
//===----------------------------------------------------------------------===//
#include "SPIRVWriter.h"
#include "LLVMToSPIRVDbgTran.h"
#include "SPIRVBasicBlock.h"
#include "SPIRVEntry.h"
#include "SPIRVEnum.h"
#include "SPIRVExtInst.h"
#include "SPIRVFunction.h"
#include "SPIRVInstruction.h"
#include "SPIRVInternal.h"
#include "SPIRVMDWalker.h"
#include "SPIRVModule.h"
#include "SPIRVType.h"
#include "SPIRVUtil.h"
#include "SPIRVValue.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Pass.h"
#include "llvm/PassSupport.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Transforms/Utils.h" // loop-simplify pass
#include <cstdlib>
#include <functional>
#include <iostream>
#include <list>
#include <memory>
#include <set>
#include <sstream>
#include <vector>
#define DEBUG_TYPE "spirv"
using namespace llvm;
using namespace SPIRV;
using namespace OCLUtil;
namespace SPIRV {
cl::opt<bool> SPIRVMemToReg("spirv-mem2reg", cl::init(true),
cl::desc("LLVM/SPIR-V translation enable mem2reg"));
cl::opt<bool> SPIRVNoDerefAttr(
"spirv-no-deref-attr", cl::init(false),
cl::desc("Do not translate 'dereferenceable' LLVM attribute to SPIR-V"));
static void foreachKernelArgMD(
MDNode *MD, SPIRVFunction *BF,
std::function<void(const std::string &Str, SPIRVFunctionParameter *BA)>
Func) {
for (unsigned I = 0, E = MD->getNumOperands(); I != E; ++I) {
SPIRVFunctionParameter *BA = BF->getArgument(I);
Func(getMDOperandAsString(MD, I), BA);
}
}
/// Information for translating OCL builtin.
struct OCLBuiltinSPIRVTransInfo {
std::string UniqName;
/// Postprocessor of operands
std::function<void(std::vector<SPIRVWord> &)> PostProc;
OCLBuiltinSPIRVTransInfo() {
PostProc = [](std::vector<SPIRVWord> &) {};
}
};
LLVMToSPIRV::LLVMToSPIRV(SPIRVModule *SMod)
: ModulePass(ID), M(nullptr), Ctx(nullptr), BM(SMod), SrcLang(0),
SrcLangVer(0) {
DbgTran = make_unique<LLVMToSPIRVDbgTran>(nullptr, SMod, this);
}
bool LLVMToSPIRV::runOnModule(Module &Mod) {
M = &Mod;
CG = make_unique<CallGraph>(Mod);
Ctx = &M->getContext();
DbgTran->setModule(M);
assert(BM && "SPIR-V module not initialized");
translate();
return true;
}
SPIRVValue *LLVMToSPIRV::getTranslatedValue(const Value *V) const {
auto Loc = ValueMap.find(V);
if (Loc != ValueMap.end())
return Loc->second;
return nullptr;
}
bool LLVMToSPIRV::oclIsKernel(Function *F) {
if (F->getCallingConv() == CallingConv::SPIR_KERNEL)
return true;
return false;
}
bool LLVMToSPIRV::isBuiltinTransToInst(Function *F) {
std::string DemangledName;
if (!oclIsBuiltin(F->getName(), &DemangledName) &&
!isDecoratedSPIRVFunc(F, &DemangledName))
return false;
SPIRVDBG(spvdbgs() << "CallInst: demangled name: " << DemangledName << '\n');
return getSPIRVFuncOC(DemangledName) != OpNop;
}
bool LLVMToSPIRV::isBuiltinTransToExtInst(Function *F,
SPIRVExtInstSetKind *ExtSet,
SPIRVWord *ExtOp,
SmallVectorImpl<std::string> *Dec) {
std::string OrigName = F->getName();
std::string DemangledName;
if (!oclIsBuiltin(OrigName, &DemangledName))
return false;
LLVM_DEBUG(dbgs() << "[oclIsBuiltinTransToExtInst] CallInst: demangled name: "
<< DemangledName << '\n');
StringRef S = DemangledName;
if (!S.startswith(kSPIRVName::Prefix))
return false;
S = S.drop_front(strlen(kSPIRVName::Prefix));
auto Loc = S.find(kSPIRVPostfix::Divider);
auto ExtSetName = S.substr(0, Loc);
SPIRVExtInstSetKind Set = SPIRVEIS_Count;
if (!SPIRVExtSetShortNameMap::rfind(ExtSetName, &Set))
return false;
assert((Set == SPIRVEIS_OpenCL || Set == SPIRVEIS_Debug) &&
"Unsupported extended instruction set");
auto ExtOpName = S.substr(Loc + 1);
auto Splited = ExtOpName.split(kSPIRVPostfix::ExtDivider);
OCLExtOpKind EOC;
if (!OCLExtOpMap::rfind(Splited.first, &EOC))
return false;
if (ExtSet)
*ExtSet = Set;
if (ExtOp)
*ExtOp = EOC;
if (Dec) {
SmallVector<StringRef, 2> P;
Splited.second.split(P, kSPIRVPostfix::Divider);
for (auto &I : P)
Dec->push_back(I.str());
}
return true;
}
/// Decode SPIR-V type name in the format spirv.{TypeName}._{Postfixes}
/// where Postfixes are strings separated by underscores.
/// \return TypeName.
/// \param Ops contains the integers decoded from postfixes.
static std::string decodeSPIRVTypeName(StringRef Name,
SmallVectorImpl<std::string> &Strs) {
SmallVector<StringRef, 4> SubStrs;
const char Delim[] = {kSPIRVTypeName::Delimiter, 0};
Name.split(SubStrs, Delim, -1, true);
assert(SubStrs.size() >= 2 && "Invalid SPIRV type name");
assert(SubStrs[0] == kSPIRVTypeName::Prefix && "Invalid prefix");
assert((SubStrs.size() == 2 || !SubStrs[2].empty()) && "Invalid postfix");
if (SubStrs.size() > 2) {
const char PostDelim[] = {kSPIRVTypeName::PostfixDelim, 0};
SmallVector<StringRef, 4> Postfixes;
SubStrs[2].split(Postfixes, PostDelim, -1, true);
assert(Postfixes.size() > 1 && Postfixes[0].empty() && "Invalid postfix");
for (unsigned I = 1, E = Postfixes.size(); I != E; ++I)
Strs.push_back(std::string(Postfixes[I]).c_str());
}
return SubStrs[1].str();
}
static bool recursiveType(const StructType *ST, const Type *Ty) {
SmallPtrSet<const StructType *, 4> Seen;
std::function<bool(const Type *Ty)> Run = [&](const Type *Ty) {
if (!isa<CompositeType>(Ty) && !Ty->isPointerTy())
return false;
if (auto *StructTy = dyn_cast<StructType>(Ty)) {
if (StructTy == ST)
return true;
if (Seen.count(StructTy))
return false;
Seen.insert(StructTy);
return find_if(StructTy->element_begin(), StructTy->element_end(), Run) !=
StructTy->element_end();
}
if (auto *PtrTy = dyn_cast<PointerType>(Ty))
return Run(PtrTy->getPointerElementType());
if (auto *ArrayTy = dyn_cast<ArrayType>(Ty))
return Run(ArrayTy->getArrayElementType());
return false;
};
return Run(Ty);
}
SPIRVType *LLVMToSPIRV::transType(Type *T) {
LLVMToSPIRVTypeMap::iterator Loc = TypeMap.find(T);
if (Loc != TypeMap.end())
return Loc->second;
SPIRVDBG(dbgs() << "[transType] " << *T << '\n');
if (T->isVoidTy())
return mapType(T, BM->addVoidType());
if (T->isIntegerTy(1))
return mapType(T, BM->addBoolType());
if (T->isIntegerTy())
return mapType(T, BM->addIntegerType(T->getIntegerBitWidth()));
if (T->isFloatingPointTy())
return mapType(T, BM->addFloatType(T->getPrimitiveSizeInBits()));
// A pointer to image or pipe type in LLVM is translated to a SPIRV
// sampler or pipe type.
if (T->isPointerTy()) {
auto ET = T->getPointerElementType();
assert(!ET->isFunctionTy() && "Function pointer type is not allowed");
auto ST = dyn_cast<StructType>(ET);
auto AddrSpc = T->getPointerAddressSpace();
if (ST && !ST->isSized()) {
Op OpCode;
StringRef STName = ST->getName();
// Workaround for non-conformant SPIR binary
if (STName == "struct._event_t") {
STName = kSPR2TypeName::Event;
ST->setName(STName);
}
if (STName.startswith(kSPR2TypeName::PipeRO) ||
STName.startswith(kSPR2TypeName::PipeWO)) {
auto PipeT = BM->addPipeType();
PipeT->setPipeAcessQualifier(STName.startswith(kSPR2TypeName::PipeRO)
? AccessQualifierReadOnly
: AccessQualifierWriteOnly);
return mapType(T, PipeT);
}
if (STName.startswith(kSPR2TypeName::ImagePrefix)) {
assert(AddrSpc == SPIRAS_Global);
auto SPIRVImageTy = getSPIRVImageTypeFromOCL(M, T);
return mapType(T, transType(SPIRVImageTy));
}
if (STName == kSPR2TypeName::Sampler)
return mapType(T, transType(getSamplerType(M)));
if (STName.startswith(kSPIRVTypeName::PrefixAndDelim))
return transSPIRVOpaqueType(T);
if (STName.startswith(kOCLSubgroupsAVCIntel::TypePrefix))
return mapType(T,
BM->addSubgroupAvcINTELType(
OCLSubgroupINTELTypeOpCodeMap::map(ST->getName())));
if (OCLOpaqueTypeOpCodeMap::find(STName, &OpCode)) {
switch (OpCode) {
default:
return mapType(T, BM->addOpaqueGenericType(OpCode));
case OpTypeDeviceEvent:
return mapType(T, BM->addDeviceEventType());
case OpTypeQueue:
return mapType(T, BM->addQueueType());
}
}
if (isPointerToOpaqueStructType(T)) {
return mapType(
T, BM->addPointerType(SPIRSPIRVAddrSpaceMap::map(
static_cast<SPIRAddressSpace>(AddrSpc)),
transType(ET)));
}
} else {
return mapType(
T, BM->addPointerType(SPIRSPIRVAddrSpaceMap::map(
static_cast<SPIRAddressSpace>(AddrSpc)),
transType(ET)));
}
}
if (T->isVectorTy())
return mapType(T, BM->addVectorType(transType(T->getVectorElementType()),
T->getVectorNumElements()));
if (T->isArrayTy()) {
// SPIR-V 1.3 s3.32.6: Length is the number of elements in the array.
// It must be at least 1.
if (T->getArrayNumElements() < 1) {
std::string Str;
llvm::raw_string_ostream OS(Str);
OS << *T;
SPIRVCK(T->getArrayNumElements() >= 1, InvalidArraySize, OS.str());
}
return mapType(T, BM->addArrayType(
transType(T->getArrayElementType()),
static_cast<SPIRVConstant *>(transValue(
ConstantInt::get(getSizetType(),
T->getArrayNumElements(), false),
nullptr))));
}
if (T->isStructTy() && !T->isSized()) {
auto ST = dyn_cast<StructType>(T);
(void)ST; // Silence warning
assert(!ST->getName().startswith(kSPR2TypeName::PipeRO));
assert(!ST->getName().startswith(kSPR2TypeName::PipeWO));
assert(!ST->getName().startswith(kSPR2TypeName::ImagePrefix));
return mapType(T, BM->addOpaqueType(T->getStructName()));
}
if (auto ST = dyn_cast<StructType>(T)) {
assert(ST->isSized());
std::string Name;
if (ST->hasName())
Name = ST->getName();
if (Name == getSPIRVTypeName(kSPIRVTypeName::ConstantSampler))
return transType(getSamplerType(M));
if (Name == getSPIRVTypeName(kSPIRVTypeName::ConstantPipeStorage))
return transType(getPipeStorageType(M));
auto *Struct = BM->openStructType(T->getStructNumElements(), Name);
mapType(T, Struct);
SmallVector<unsigned, 4> ForwardRefs;
for (unsigned I = 0, E = T->getStructNumElements(); I != E; ++I) {
auto *ElemTy = ST->getElementType(I);
if ((isa<CompositeType>(ElemTy) || isa<PointerType>(ElemTy)) &&
recursiveType(ST, ElemTy))
ForwardRefs.push_back(I);
else
Struct->setMemberType(I, transType(ST->getElementType(I)));
}
BM->closeStructType(Struct, ST->isPacked());
for (auto I : ForwardRefs)
Struct->setMemberType(I, transType(ST->getElementType(I)));
return Struct;
}
if (FunctionType *FT = dyn_cast<FunctionType>(T)) {
SPIRVType *RT = transType(FT->getReturnType());
std::vector<SPIRVType *> PT;
for (FunctionType::param_iterator I = FT->param_begin(),
E = FT->param_end();
I != E; ++I)
PT.push_back(transType(*I));
return mapType(T, BM->addFunctionType(RT, PT));
}
llvm_unreachable("Not implemented!");
return 0;
}
SPIRVType *LLVMToSPIRV::transSPIRVOpaqueType(Type *T) {
auto ET = T->getPointerElementType();
auto ST = cast<StructType>(ET);
auto STName = ST->getStructName();
assert(STName.startswith(kSPIRVTypeName::PrefixAndDelim) &&
"Invalid SPIR-V opaque type name");
SmallVector<std::string, 8> Postfixes;
auto TN = decodeSPIRVTypeName(STName, Postfixes);
if (TN == kSPIRVTypeName::Pipe) {
assert(T->getPointerAddressSpace() == SPIRAS_Global);
assert(Postfixes.size() == 1 && "Invalid pipe type ops");
auto PipeT = BM->addPipeType();
PipeT->setPipeAcessQualifier(
static_cast<spv::AccessQualifier>(atoi(Postfixes[0].c_str())));
return mapType(T, PipeT);
} else if (TN == kSPIRVTypeName::Image) {
assert(T->getPointerAddressSpace() == SPIRAS_Global);
// The sampled type needs to be translated through LLVM type to guarantee
// uniqueness.
auto SampledT = transType(
getLLVMTypeForSPIRVImageSampledTypePostfix(Postfixes[0], *Ctx));
SmallVector<int, 7> Ops;
for (unsigned I = 1; I < 8; ++I)
Ops.push_back(atoi(Postfixes[I].c_str()));
SPIRVTypeImageDescriptor Desc(static_cast<SPIRVImageDimKind>(Ops[0]),
Ops[1], Ops[2], Ops[3], Ops[4], Ops[5]);
return mapType(T,
BM->addImageType(SampledT, Desc,
static_cast<spv::AccessQualifier>(Ops[6])));
} else if (TN == kSPIRVTypeName::SampledImg) {
return mapType(
T, BM->addSampledImageType(static_cast<SPIRVTypeImage *>(
transType(getSPIRVTypeByChangeBaseTypeName(
M, T, kSPIRVTypeName::SampledImg, kSPIRVTypeName::Image)))));
} else if (TN == kSPIRVTypeName::VmeImageINTEL) {
// This type is the same as SampledImageType, but consumed by Subgroup AVC
// Intel extension instructions.
return mapType(
T,
BM->addVmeImageINTELType(static_cast<SPIRVTypeImage *>(
transType(getSPIRVTypeByChangeBaseTypeName(
M, T, kSPIRVTypeName::VmeImageINTEL, kSPIRVTypeName::Image)))));
} else if (TN == kSPIRVTypeName::Sampler)
return mapType(T, BM->addSamplerType());
else if (TN == kSPIRVTypeName::DeviceEvent)
return mapType(T, BM->addDeviceEventType());
else if (TN == kSPIRVTypeName::Queue)
return mapType(T, BM->addQueueType());
else if (TN == kSPIRVTypeName::PipeStorage)
return mapType(T, BM->addPipeStorageType());
else
return mapType(T,
BM->addOpaqueGenericType(SPIRVOpaqueTypeOpCodeMap::map(TN)));
}
SPIRVFunction *LLVMToSPIRV::transFunctionDecl(Function *F) {
if (auto BF = getTranslatedValue(F))
return static_cast<SPIRVFunction *>(BF);
if (F->isIntrinsic()) {
// We should not translate LLVM intrinsics as a function
assert(none_of(F->user_begin(), F->user_end(),
[this](User *U) { return getTranslatedValue(U); }) &&
"LLVM intrinsics shouldn't be called in SPIRV");
return nullptr;
}
SPIRVTypeFunction *BFT = static_cast<SPIRVTypeFunction *>(
transType(getAnalysis<OCLTypeToSPIRV>().getAdaptedType(F)));
SPIRVFunction *BF =
static_cast<SPIRVFunction *>(mapValue(F, BM->addFunction(BFT)));
BF->setFunctionControlMask(transFunctionControlMask(F));
if (F->hasName())
BM->setName(BF, F->getName());
if (oclIsKernel(F))
BM->addEntryPoint(ExecutionModelKernel, BF->getId());
else if (F->getLinkage() != GlobalValue::InternalLinkage)
BF->setLinkageType(transLinkageType(F));
auto Attrs = F->getAttributes();
for (Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E;
++I) {
auto ArgNo = I->getArgNo();
SPIRVFunctionParameter *BA = BF->getArgument(ArgNo);
if (I->hasName())
BM->setName(BA, I->getName());
if (I->hasByValAttr())
BA->addAttr(FunctionParameterAttributeByVal);
if (I->hasNoAliasAttr())
BA->addAttr(FunctionParameterAttributeNoAlias);
if (I->hasNoCaptureAttr())
BA->addAttr(FunctionParameterAttributeNoCapture);
if (I->hasStructRetAttr())
BA->addAttr(FunctionParameterAttributeSret);
if (Attrs.hasAttribute(ArgNo + 1, Attribute::ZExt))
BA->addAttr(FunctionParameterAttributeZext);
if (Attrs.hasAttribute(ArgNo + 1, Attribute::SExt))
BA->addAttr(FunctionParameterAttributeSext);
if (!SPIRVNoDerefAttr &&
Attrs.hasAttribute(ArgNo + 1, Attribute::Dereferenceable))
BA->addDecorate(DecorationMaxByteOffset,
Attrs.getAttribute(ArgNo + 1, Attribute::Dereferenceable)
.getDereferenceableBytes());
}
if (Attrs.hasAttribute(AttributeList::ReturnIndex, Attribute::ZExt))
BF->addDecorate(DecorationFuncParamAttr, FunctionParameterAttributeZext);
if (Attrs.hasAttribute(AttributeList::ReturnIndex, Attribute::SExt))
BF->addDecorate(DecorationFuncParamAttr, FunctionParameterAttributeSext);
SPIRVDBG(dbgs() << "[transFunction] " << *F << " => ";
spvdbgs() << *BF << '\n';)
return BF;
}
#define _SPIRV_OPL(x) OpLogical##x
#define _SPIRV_OPB(x) OpBitwise##x
SPIRVValue *LLVMToSPIRV::transConstant(Value *V) {
if (auto CPNull = dyn_cast<ConstantPointerNull>(V))
return BM->addNullConstant(
bcast<SPIRVTypePointer>(transType(CPNull->getType())));
if (auto CAZero = dyn_cast<ConstantAggregateZero>(V)) {
Type *AggType = CAZero->getType();
if (const StructType *ST = dyn_cast<StructType>(AggType))
if (ST->hasName() &&
ST->getName() == getSPIRVTypeName(kSPIRVTypeName::ConstantSampler))
return BM->addSamplerConstant(transType(AggType), 0, 0, 0);
return BM->addNullConstant(transType(AggType));
}
if (auto ConstI = dyn_cast<ConstantInt>(V))
return BM->addConstant(transType(V->getType()), ConstI->getZExtValue());
if (auto ConstFP = dyn_cast<ConstantFP>(V)) {
auto BT = static_cast<SPIRVType *>(transType(V->getType()));
return BM->addConstant(
BT, ConstFP->getValueAPF().bitcastToAPInt().getZExtValue());
}
if (auto ConstDA = dyn_cast<ConstantDataArray>(V)) {
std::vector<SPIRVValue *> BV;
for (unsigned I = 0, E = ConstDA->getNumElements(); I != E; ++I)
BV.push_back(transValue(ConstDA->getElementAsConstant(I), nullptr));
return BM->addCompositeConstant(transType(V->getType()), BV);
}
if (auto ConstA = dyn_cast<ConstantArray>(V)) {
std::vector<SPIRVValue *> BV;
for (auto I = ConstA->op_begin(), E = ConstA->op_end(); I != E; ++I)
BV.push_back(transValue(*I, nullptr));
return BM->addCompositeConstant(transType(V->getType()), BV);
}
if (auto ConstDV = dyn_cast<ConstantDataVector>(V)) {
std::vector<SPIRVValue *> BV;
for (unsigned I = 0, E = ConstDV->getNumElements(); I != E; ++I)
BV.push_back(transValue(ConstDV->getElementAsConstant(I), nullptr));
return BM->addCompositeConstant(transType(V->getType()), BV);
}
if (auto ConstV = dyn_cast<ConstantVector>(V)) {
std::vector<SPIRVValue *> BV;
for (auto I = ConstV->op_begin(), E = ConstV->op_end(); I != E; ++I)
BV.push_back(transValue(*I, nullptr));
return BM->addCompositeConstant(transType(V->getType()), BV);
}
if (const auto *ConstV = dyn_cast<ConstantStruct>(V)) {
StringRef StructName;
if (ConstV->getType()->hasName())
StructName = ConstV->getType()->getName();
if (StructName == getSPIRVTypeName(kSPIRVTypeName::ConstantSampler)) {
assert(ConstV->getNumOperands() == 3);
SPIRVWord AddrMode =
ConstV->getOperand(0)->getUniqueInteger().getZExtValue(),
Normalized =
ConstV->getOperand(1)->getUniqueInteger().getZExtValue(),
FilterMode =
ConstV->getOperand(2)->getUniqueInteger().getZExtValue();
assert(AddrMode < 5 && "Invalid addressing mode");
assert(Normalized < 2 && "Invalid value of normalized coords");
assert(FilterMode < 2 && "Invalid filter mode");
SPIRVType *SamplerTy = transType(ConstV->getType());
return BM->addSamplerConstant(SamplerTy, AddrMode, Normalized,
FilterMode);
}
if (StructName == getSPIRVTypeName(kSPIRVTypeName::ConstantPipeStorage)) {
assert(ConstV->getNumOperands() == 3);
SPIRVWord PacketSize =
ConstV->getOperand(0)->getUniqueInteger().getZExtValue(),
PacketAlign =
ConstV->getOperand(1)->getUniqueInteger().getZExtValue(),
Capacity =
ConstV->getOperand(2)->getUniqueInteger().getZExtValue();
assert(PacketAlign >= 1 && "Invalid packet alignment");
assert(PacketSize >= PacketAlign && PacketSize % PacketAlign == 0 &&
"Invalid packet size and/or alignment.");
SPIRVType *PipeStorageTy = transType(ConstV->getType());
return BM->addPipeStorageConstant(PipeStorageTy, PacketSize, PacketAlign,
Capacity);
}
std::vector<SPIRVValue *> BV;
for (auto I = ConstV->op_begin(), E = ConstV->op_end(); I != E; ++I)
BV.push_back(transValue(*I, nullptr));
return BM->addCompositeConstant(transType(V->getType()), BV);
}
if (auto ConstUE = dyn_cast<ConstantExpr>(V)) {
auto Inst = ConstUE->getAsInstruction();
SPIRVDBG(dbgs() << "ConstantExpr: " << *ConstUE << '\n';
dbgs() << "Instruction: " << *Inst << '\n';)
auto BI = transValue(Inst, nullptr, false);
Inst->dropAllReferences();
return BI;
}
if (isa<UndefValue>(V)) {
return BM->addUndef(transType(V->getType()));
}
return nullptr;
}
SPIRVValue *LLVMToSPIRV::transValue(Value *V, SPIRVBasicBlock *BB,
bool CreateForward) {
LLVMToSPIRVValueMap::iterator Loc = ValueMap.find(V);
if (Loc != ValueMap.end() && (!Loc->second->isForward() || CreateForward))
return Loc->second;
SPIRVDBG(dbgs() << "[transValue] " << *V << '\n');
assert((!isa<Instruction>(V) || isa<GetElementPtrInst>(V) ||
isa<CastInst>(V) || BB) &&
"Invalid SPIRV BB");
auto BV = transValueWithoutDecoration(V, BB, CreateForward);
if (!BV || !transDecoration(V, BV))
return nullptr;
std::string Name = V->getName();
if (!Name.empty()) // Don't erase the name, which BM might already have
BM->setName(BV, Name);
return BV;
}
SPIRVInstruction *LLVMToSPIRV::transBinaryInst(BinaryOperator *B,
SPIRVBasicBlock *BB) {
unsigned LLVMOC = B->getOpcode();
auto Op0 = transValue(B->getOperand(0), BB);
SPIRVInstruction *BI = BM->addBinaryInst(
transBoolOpCode(Op0, OpCodeMap::map(LLVMOC)), transType(B->getType()),
Op0, transValue(B->getOperand(1), BB), BB);
checkFpContract(B, BB);
return BI;
}
SPIRVInstruction *LLVMToSPIRV::transCmpInst(CmpInst *Cmp, SPIRVBasicBlock *BB) {
auto Op0 = transValue(Cmp->getOperand(0), BB);
SPIRVInstruction *BI = BM->addCmpInst(
transBoolOpCode(Op0, CmpMap::map(Cmp->getPredicate())),
transType(Cmp->getType()), Op0, transValue(Cmp->getOperand(1), BB), BB);
return BI;
}
SPIRV::SPIRVInstruction *LLVMToSPIRV::transUnaryInst(UnaryInstruction *U,
SPIRVBasicBlock *BB) {
Op BOC = OpNop;
if (auto Cast = dyn_cast<AddrSpaceCastInst>(U)) {
if (Cast->getDestTy()->getPointerAddressSpace() == SPIRAS_Generic) {
assert(Cast->getSrcTy()->getPointerAddressSpace() != SPIRAS_Constant &&
"Casts from constant address space to generic are illegal");
BOC = OpPtrCastToGeneric;
} else {
assert(Cast->getDestTy()->getPointerAddressSpace() != SPIRAS_Constant &&
"Casts from generic address space to constant are illegal");
assert(Cast->getSrcTy()->getPointerAddressSpace() == SPIRAS_Generic);
BOC = OpGenericCastToPtr;
}
} else {
auto OpCode = U->getOpcode();
BOC = OpCodeMap::map(OpCode);
}
auto Op = transValue(U->getOperand(0), BB);
return BM->addUnaryInst(transBoolOpCode(Op, BOC), transType(U->getType()), Op,
BB);
}
/// An instruction may use an instruction from another BB which has not been
/// translated. SPIRVForward should be created as place holder for these
/// instructions and replaced later by the real instructions.
/// Use CreateForward = true to indicate such situation.
SPIRVValue *LLVMToSPIRV::transValueWithoutDecoration(Value *V,
SPIRVBasicBlock *BB,
bool CreateForward) {
if (auto LBB = dyn_cast<BasicBlock>(V)) {
auto BF =
static_cast<SPIRVFunction *>(getTranslatedValue(LBB->getParent()));
assert(BF && "Function not translated");
BB = static_cast<SPIRVBasicBlock *>(mapValue(V, BM->addBasicBlock(BF)));
BM->setName(BB, LBB->getName());
return BB;
}
if (auto F = dyn_cast<Function>(V))
return transFunctionDecl(F);
if (auto GV = dyn_cast<GlobalVariable>(V)) {
llvm::PointerType *Ty = GV->getType();
// Though variables with common linkage type are initialized by 0,
// they can be represented in SPIR-V as uninitialized variables with
// 'Export' linkage type, just as tentative definitions look in C
llvm::Value *Init = GV->hasInitializer() && !GV->hasCommonLinkage()
? GV->getInitializer()
: nullptr;
StructType *ST = Init ? dyn_cast<StructType>(Init->getType()) : nullptr;
if (ST && ST->hasName() && isSPIRVConstantName(ST->getName())) {
auto BV = transConstant(Init);
assert(BV);
return mapValue(V, BV);
} else if (ConstantExpr *ConstUE = dyn_cast_or_null<ConstantExpr>(Init)) {
Instruction *Inst = ConstUE->getAsInstruction();
if (isSpecialTypeInitializer(Inst)) {
Init = Inst->getOperand(0);
Ty = static_cast<PointerType *>(Init->getType());
}
Inst->dropAllReferences();
}
// Translate initializer first.
SPIRVValue *BVarInit =
(Init && !isa<UndefValue>(Init)) ? transValue(Init, nullptr) : nullptr;
auto BVar = static_cast<SPIRVVariable *>(BM->addVariable(
transType(Ty), GV->isConstant(), transLinkageType(GV), BVarInit,
GV->getName(),
SPIRSPIRVAddrSpaceMap::map(
static_cast<SPIRAddressSpace>(Ty->getAddressSpace())),
nullptr));
mapValue(V, BVar);
spv::BuiltIn Builtin = spv::BuiltInPosition;
if (!GV->hasName() || !getSPIRVBuiltin(GV->getName().str(), Builtin))
return BVar;
BVar->setBuiltin(Builtin);
return BVar;
}
if (isa<Constant>(V)) {
auto BV = transConstant(V);
assert(BV);
return mapValue(V, BV);
}
if (auto Arg = dyn_cast<Argument>(V)) {
unsigned ArgNo = Arg->getArgNo();
SPIRVFunction *BF = BB->getParent();
// assert(BF->existArgument(ArgNo));
return mapValue(V, BF->getArgument(ArgNo));
}
if (CreateForward)
return mapValue(V, BM->addForward(transType(V->getType())));
if (StoreInst *ST = dyn_cast<StoreInst>(V)) {
std::vector<SPIRVWord> MemoryAccess(1, 0);
if (ST->isVolatile())
MemoryAccess[0] |= MemoryAccessVolatileMask;
if (ST->getAlignment()) {
MemoryAccess[0] |= MemoryAccessAlignedMask;
MemoryAccess.push_back(ST->getAlignment());
}
if (ST->getMetadata(LLVMContext::MD_nontemporal))
MemoryAccess[0] |= MemoryAccessNontemporalMask;
if (MemoryAccess.front() == 0)
MemoryAccess.clear();
return mapValue(V, BM->addStoreInst(transValue(ST->getPointerOperand(), BB),
transValue(ST->getValueOperand(), BB),
MemoryAccess, BB));
}
if (LoadInst *LD = dyn_cast<LoadInst>(V)) {
std::vector<SPIRVWord> MemoryAccess(1, 0);
if (LD->isVolatile())
MemoryAccess[0] |= MemoryAccessVolatileMask;
if (LD->getAlignment()) {
MemoryAccess[0] |= MemoryAccessAlignedMask;
MemoryAccess.push_back(LD->getAlignment());
}
if (LD->getMetadata(LLVMContext::MD_nontemporal))
MemoryAccess[0] |= MemoryAccessNontemporalMask;
if (MemoryAccess.front() == 0)
MemoryAccess.clear();
return mapValue(V, BM->addLoadInst(transValue(LD->getPointerOperand(), BB),
MemoryAccess, BB));
}
if (BinaryOperator *B = dyn_cast<BinaryOperator>(V)) {
SPIRVInstruction *BI = transBinaryInst(B, BB);
return mapValue(V, BI);
}
if (dyn_cast<UnreachableInst>(V))
return mapValue(V, BM->addUnreachableInst(BB));
if (auto RI = dyn_cast<ReturnInst>(V)) {
if (auto RV = RI->getReturnValue())
return mapValue(V, BM->addReturnValueInst(transValue(RV, BB), BB));
return mapValue(V, BM->addReturnInst(BB));
}
if (CmpInst *Cmp = dyn_cast<CmpInst>(V)) {
SPIRVInstruction *BI = transCmpInst(Cmp, BB);
return mapValue(V, BI);
}
if (SelectInst *Sel = dyn_cast<SelectInst>(V))
return mapValue(V, BM->addSelectInst(transValue(Sel->getCondition(), BB),
transValue(Sel->getTrueValue(), BB),
transValue(Sel->getFalseValue(), BB),
BB));
if (AllocaInst *Alc = dyn_cast<AllocaInst>(V))
return mapValue(
V, BM->addVariable(transType(Alc->getType()), false,
SPIRVLinkageTypeKind::LinkageTypeInternal, nullptr,
Alc->getName(), StorageClassFunction, BB));
if (auto *Switch = dyn_cast<SwitchInst>(V)) {
std::vector<SPIRVSwitch::PairTy> Pairs;
auto Select = transValue(Switch->getCondition(), BB);
for (auto I = Switch->case_begin(), E = Switch->case_end(); I != E; ++I) {
SPIRVSwitch::LiteralTy Lit;
uint64_t CaseValue = I->getCaseValue()->getZExtValue();
Lit.push_back(CaseValue);
assert(Select->getType()->getBitWidth() <= 64 &&
"unexpected selector bitwidth");
if (Select->getType()->getBitWidth() == 64)
Lit.push_back(CaseValue >> 32);
Pairs.push_back(
std::make_pair(Lit, static_cast<SPIRVBasicBlock *>(
transValue(I->getCaseSuccessor(), nullptr))));
}
return mapValue(
V, BM->addSwitchInst(Select,
static_cast<SPIRVBasicBlock *>(
transValue(Switch->getDefaultDest(), nullptr)),
Pairs, BB));
}
if (BranchInst *Branch = dyn_cast<BranchInst>(V)) {
SPIRVLabel *SuccessorTrue =
static_cast<SPIRVLabel *>(transValue(Branch->getSuccessor(0), BB));
/// Clang attaches !llvm.loop metadata to "latch" BB. This kind of blocks
/// has an edge directed to the loop header. Thus latch BB matching to
/// "Continue Target" per the SPIR-V spec. This statement is true only after
/// applying the loop-simplify pass to the LLVM module.
/// For "for" and "while" loops latch BB is terminated by an
/// unconditional branch. Also for this kind of loops "Merge Block" can
/// be found as block targeted by false edge of the "Header" BB.
/// For "do while" loop the latch is terminated by a conditional branch
/// with true edge going to the header and the false edge going out of
/// the loop, which corresponds to a "Merge Block" per the SPIR-V spec.
std::vector<SPIRVWord> Parameters;
spv::LoopControlMask LoopControl = getLoopControl(Branch, Parameters);
if (Branch->isUnconditional()) {
// For "for" and "while" loops llvm.loop metadata is attached to
// an unconditional branch instruction.
if (LoopControl != spv::LoopControlMaskNone) {
// SuccessorTrue is the loop header BB.
const SPIRVInstruction *Term = SuccessorTrue->getTerminateInstr();
if (Term && Term->getOpCode() == OpBranchConditional) {
const auto *Br = static_cast<const SPIRVBranchConditional *>(Term);
BM->addLoopMergeInst(Br->getFalseLabel()->getId(), // Merge Block
BB->getId(), // Continue Target
LoopControl, Parameters, SuccessorTrue);
}
}
return mapValue(V, BM->addBranchInst(SuccessorTrue, BB));
}
// For "do-while" loops llvm.loop metadata is attached to a conditional
// branch instructions
SPIRVLabel *SuccessorFalse =
static_cast<SPIRVLabel *>(transValue(Branch->getSuccessor(1), BB));
if (LoopControl != spv::LoopControlMaskNone)
// SuccessorTrue is the loop header BB.
BM->addLoopMergeInst(SuccessorFalse->getId(), // Merge Block
BB->getId(), // Continue Target
LoopControl, Parameters, SuccessorTrue);
return mapValue(
V, BM->addBranchConditionalInst(transValue(Branch->getCondition(), BB),
SuccessorTrue, SuccessorFalse, BB));
}
if (auto Phi = dyn_cast<PHINode>(V)) {
std::vector<SPIRVValue *> IncomingPairs;
for (size_t I = 0, E = Phi->getNumIncomingValues(); I != E; ++I) {
IncomingPairs.push_back(transValue(Phi->getIncomingValue(I), BB));
IncomingPairs.push_back(transValue(Phi->getIncomingBlock(I), nullptr));
}
return mapValue(
V, BM->addPhiInst(transType(Phi->getType()), IncomingPairs, BB));
}
if (auto Ext = dyn_cast<ExtractValueInst>(V)) {
return mapValue(V, BM->addCompositeExtractInst(
transType(Ext->getType()),
transValue(Ext->getAggregateOperand(), BB),
Ext->getIndices(), BB));
}
if (auto Ins = dyn_cast<InsertValueInst>(V)) {
return mapValue(V, BM->addCompositeInsertInst(
transValue(Ins->getInsertedValueOperand(), BB),
transValue(Ins->getAggregateOperand(), BB),
Ins->getIndices(), BB));
}
if (UnaryInstruction *U = dyn_cast<UnaryInstruction>(V)) {
if (isSpecialTypeInitializer(U))
return mapValue(V, transValue(U->getOperand(0), BB));
return mapValue(V, transUnaryInst(U, BB));
}
if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(V)) {
std::vector<SPIRVValue *> Indices;
for (unsigned I = 0, E = GEP->getNumIndices(); I != E; ++I)
Indices.push_back(transValue(GEP->getOperand(I + 1), BB));
return mapValue(
V, BM->addPtrAccessChainInst(transType(GEP->getType()),
transValue(GEP->getPointerOperand(), BB),
Indices, BB, GEP->isInBounds()));
}
if (auto Ext = dyn_cast<ExtractElementInst>(V)) {
auto Index = Ext->getIndexOperand();
if (auto Const = dyn_cast<ConstantInt>(Index))
return mapValue(V, BM->addCompositeExtractInst(
transType(Ext->getType()),
transValue(Ext->getVectorOperand(), BB),
std::vector<SPIRVWord>(1, Const->getZExtValue()),
BB));
else
return mapValue(V, BM->addVectorExtractDynamicInst(
transValue(Ext->getVectorOperand(), BB),
transValue(Index, BB), BB));
}
if (auto Ins = dyn_cast<InsertElementInst>(V)) {
auto Index = Ins->getOperand(2);
if (auto Const = dyn_cast<ConstantInt>(Index))
return mapValue(V, BM->addCompositeInsertInst(
transValue(Ins->getOperand(1), BB),
transValue(Ins->getOperand(0), BB),
std::vector<SPIRVWord>(1, Const->getZExtValue()),
BB));
else
return mapValue(
V, BM->addVectorInsertDynamicInst(transValue(Ins->getOperand(0), BB),
transValue(Ins->getOperand(1), BB),
transValue(Index, BB), BB));
}
if (auto SF = dyn_cast<ShuffleVectorInst>(V)) {
std::vector<SPIRVWord> Comp;
for (auto &I : SF->getShuffleMask())
Comp.push_back(I);
return mapValue(V, BM->addVectorShuffleInst(
transType(SF->getType()),
transValue(SF->getOperand(0), BB),
transValue(SF->getOperand(1), BB), Comp, BB));
}
if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(V)) {
SPIRVValue *BV = transIntrinsicInst(II, BB);
return BV ? mapValue(V, BV) : nullptr;
}
if (CallInst *CI = dyn_cast<CallInst>(V))
return mapValue(V, transCallInst(CI, BB));