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OCLToSPIRV.cpp
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//===- OCLToSPIRV.cpp - Transform OCL to SPIR-V builtins --------*- C++ -*-===//
//
// The LLVM/SPIRV 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.
//
//===----------------------------------------------------------------------===//
//
// This file implements preprocessing of OpenCL C built-in functions into SPIR-V
// friendly IR form for further translation into SPIR-V
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "ocl-to-spv"
#include "OCLToSPIRV.h"
#include "OCLTypeToSPIRV.h"
#include "SPIRVInternal.h"
#include "libSPIRV/SPIRVDebug.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/Support/Debug.h"
#include <algorithm>
#include <set>
using namespace llvm;
using namespace SPIRV;
using namespace OCLUtil;
namespace SPIRV {
static size_t getOCLCpp11AtomicMaxNumOps(StringRef Name) {
return StringSwitch<size_t>(Name)
.Cases("load", "flag_test_and_set", "flag_clear", 3)
.Cases("store", "exchange", 4)
.StartsWith("compare_exchange", 6)
.StartsWith("fetch", 4)
.Default(0);
}
static Type *getBlockStructType(Value *Parameter) {
// In principle, this information should be passed to us from Clang via
// an elementtype attribute. However, said attribute requires that the
// function call be an intrinsic, which it is not. Instead, we rely on being
// able to trace this to the declaration of a variable: OpenCL C specification
// section 6.12.5 should guarantee that we can do this.
Value *UnderlyingObject = Parameter->stripPointerCasts();
Type *ParamType = nullptr;
if (auto *GV = dyn_cast<GlobalValue>(UnderlyingObject))
ParamType = GV->getValueType();
else if (auto *Alloca = dyn_cast<AllocaInst>(UnderlyingObject))
ParamType = Alloca->getAllocatedType();
else
llvm_unreachable("Blocks in OpenCL C must be traceable to allocation site");
return ParamType;
}
/// Return one of the SPIR-V 1.4 SignExtend or ZeroExtend image operands
/// for a demangled function name, or 0 if the function does not return an
/// integer type (e.g. read_imagef).
static unsigned getImageSignZeroExt(StringRef DemangledName) {
bool IsSigned = !DemangledName.endswith("ui") && DemangledName.back() == 'i';
bool IsUnsigned = DemangledName.endswith("ui");
if (IsSigned)
return ImageOperandsMask::ImageOperandsSignExtendMask;
if (IsUnsigned)
return ImageOperandsMask::ImageOperandsZeroExtendMask;
return 0;
}
bool OCLToSPIRVLegacy::runOnModule(Module &M) {
setOCLTypeToSPIRV(&getAnalysis<OCLTypeToSPIRVLegacy>());
return runOCLToSPIRV(M);
}
void OCLToSPIRVLegacy::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<OCLTypeToSPIRVLegacy>();
}
llvm::PreservedAnalyses OCLToSPIRVPass::run(llvm::Module &M,
llvm::ModuleAnalysisManager &MAM) {
setOCLTypeToSPIRV(&MAM.getResult<OCLTypeToSPIRVPass>(M));
return runOCLToSPIRV(M) ? llvm::PreservedAnalyses::none()
: llvm::PreservedAnalyses::all();
}
/// Get vector width from OpenCL vload* function name.
SPIRVWord OCLToSPIRVBase::getVecLoadWidth(const std::string &DemangledName) {
SPIRVWord Width = 0;
if (DemangledName == "vloada_half")
Width = 1;
else {
unsigned Loc = 5;
if (DemangledName.find("vload_half") == 0)
Loc = 10;
else if (DemangledName.find("vloada_half") == 0)
Loc = 11;
std::stringstream SS(DemangledName.substr(Loc));
SS >> Width;
}
return Width;
}
/// Transform OpenCL vload/vstore function name.
void OCLToSPIRVBase::transVecLoadStoreName(std::string &DemangledName,
const std::string &Stem,
bool AlwaysN) {
auto HalfStem = Stem + "_half";
auto HalfStemR = HalfStem + "_r";
if (!AlwaysN && DemangledName == HalfStem)
return;
if (!AlwaysN && DemangledName.find(HalfStemR) == 0) {
DemangledName = HalfStemR;
return;
}
if (DemangledName.find(HalfStem) == 0) {
auto OldName = DemangledName;
DemangledName = HalfStem + "n";
if (OldName.find("_r") != std::string::npos)
DemangledName += "_r";
return;
}
if (DemangledName.find(Stem) == 0) {
DemangledName = Stem + "n";
return;
}
}
char OCLToSPIRVLegacy::ID = 0;
bool OCLToSPIRVBase::runOCLToSPIRV(Module &Module) {
initialize(Module);
Ctx = &M->getContext();
auto Src = getSPIRVSource(&Module);
// This is a pre-processing pass, which transform LLVM IR module to a more
// suitable form for the SPIR-V translation: it is specifically designed to
// handle OpenCL C built-in functions and shouldn't be launched for other
// source languages
if (std::get<0>(Src) != spv::SourceLanguageOpenCL_C)
return false;
CLVer = std::get<1>(Src);
LLVM_DEBUG(dbgs() << "Enter OCLToSPIRV:\n");
visit(*M);
for (auto &I : ValuesToDelete)
if (auto Inst = dyn_cast<Instruction>(I))
Inst->eraseFromParent();
for (auto &I : ValuesToDelete)
if (auto GV = dyn_cast<GlobalValue>(I))
GV->eraseFromParent();
eraseUselessFunctions(M); // remove unused functions declarations
LLVM_DEBUG(dbgs() << "After OCLToSPIRV:\n" << *M);
verifyRegularizationPass(*M, "OCLToSPIRV");
return true;
}
// The order of handling OCL builtin functions is important.
// Workgroup functions need to be handled before pipe functions since
// there are functions fall into both categories.
void OCLToSPIRVBase::visitCallInst(CallInst &CI) {
LLVM_DEBUG(dbgs() << "[visistCallInst] " << CI << '\n');
auto F = CI.getCalledFunction();
if (!F)
return;
auto MangledName = F->getName();
StringRef DemangledName;
if (!oclIsBuiltin(MangledName, DemangledName))
return;
LLVM_DEBUG(dbgs() << "DemangledName: " << DemangledName << '\n');
if (DemangledName.find(kOCLBuiltinName::NDRangePrefix) == 0) {
visitCallNDRange(&CI, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::All) {
visitCallAllAny(OpAll, &CI);
return;
}
if (DemangledName == kOCLBuiltinName::Any) {
visitCallAllAny(OpAny, &CI);
return;
}
if (DemangledName.find(kOCLBuiltinName::AsyncWorkGroupCopy) == 0 ||
DemangledName.find(kOCLBuiltinName::AsyncWorkGroupStridedCopy) == 0) {
visitCallAsyncWorkGroupCopy(&CI, DemangledName);
return;
}
if (DemangledName.find(kOCLBuiltinName::AtomicPrefix) == 0 ||
DemangledName.find(kOCLBuiltinName::AtomPrefix) == 0) {
// Compute atomic builtins do not support floating types.
if (CI.getType()->isFloatingPointTy() &&
isComputeAtomicOCLBuiltin(DemangledName))
return;
auto PCI = &CI;
if (DemangledName == kOCLBuiltinName::AtomicInit) {
visitCallAtomicInit(PCI);
return;
}
if (DemangledName == kOCLBuiltinName::AtomicWorkItemFence) {
visitCallAtomicWorkItemFence(PCI);
return;
}
if (DemangledName == kOCLBuiltinName::AtomicCmpXchgWeak ||
DemangledName == kOCLBuiltinName::AtomicCmpXchgStrong ||
DemangledName == kOCLBuiltinName::AtomicCmpXchgWeakExplicit ||
DemangledName == kOCLBuiltinName::AtomicCmpXchgStrongExplicit) {
assert((CLVer == kOCLVer::CL20 || CLVer == kOCLVer::CL30) &&
"Wrong version of OpenCL");
PCI = visitCallAtomicCmpXchg(PCI);
}
visitCallAtomicLegacy(PCI, MangledName, DemangledName);
visitCallAtomicCpp11(PCI, MangledName, DemangledName);
return;
}
if (DemangledName.find(kOCLBuiltinName::ConvertPrefix) == 0) {
visitCallConvert(&CI, MangledName, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::GetImageWidth ||
DemangledName == kOCLBuiltinName::GetImageHeight ||
DemangledName == kOCLBuiltinName::GetImageDepth ||
DemangledName == kOCLBuiltinName::GetImageDim ||
DemangledName == kOCLBuiltinName::GetImageArraySize) {
visitCallGetImageSize(&CI, DemangledName);
return;
}
if ((DemangledName.find(kOCLBuiltinName::WorkGroupPrefix) == 0 &&
DemangledName != kOCLBuiltinName::WorkGroupBarrier) ||
DemangledName == kOCLBuiltinName::WaitGroupEvent ||
(DemangledName.find(kOCLBuiltinName::SubGroupPrefix) == 0 &&
DemangledName != kOCLBuiltinName::SubGroupBarrier)) {
visitCallGroupBuiltin(&CI, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::MemFence ||
DemangledName == kOCLBuiltinName::ReadMemFence ||
DemangledName == kOCLBuiltinName::WriteMemFence) {
visitCallMemFence(&CI, DemangledName);
return;
}
if (DemangledName.find(kOCLBuiltinName::ReadImage) == 0) {
if (MangledName.find(kMangledName::Sampler) != StringRef::npos) {
visitCallReadImageWithSampler(&CI, MangledName, DemangledName);
return;
}
if (MangledName.find("msaa") != StringRef::npos) {
visitCallReadImageMSAA(&CI, MangledName);
return;
}
}
if (DemangledName.find(kOCLBuiltinName::ReadImage) == 0 ||
DemangledName.find(kOCLBuiltinName::WriteImage) == 0) {
visitCallReadWriteImage(&CI, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::ToGlobal ||
DemangledName == kOCLBuiltinName::ToLocal ||
DemangledName == kOCLBuiltinName::ToPrivate) {
visitCallToAddr(&CI, DemangledName);
return;
}
if (DemangledName.find(kOCLBuiltinName::VLoadPrefix) == 0 ||
DemangledName.find(kOCLBuiltinName::VStorePrefix) == 0) {
visitCallVecLoadStore(&CI, MangledName, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::IsFinite ||
DemangledName == kOCLBuiltinName::IsInf ||
DemangledName == kOCLBuiltinName::IsNan ||
DemangledName == kOCLBuiltinName::IsNormal ||
DemangledName == kOCLBuiltinName::Signbit) {
visitCallRelational(&CI, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::WorkGroupBarrier ||
DemangledName == kOCLBuiltinName::Barrier ||
DemangledName == kOCLBuiltinName::SubGroupBarrier) {
visitCallBarrier(&CI);
return;
}
if (DemangledName == kOCLBuiltinName::GetFence) {
visitCallGetFence(&CI, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::Dot &&
CI.getOperand(0)->getType()->isFloatingPointTy()) {
visitCallDot(&CI);
return;
}
if (DemangledName == kOCLBuiltinName::Dot ||
DemangledName == kOCLBuiltinName::DotAccSat ||
DemangledName.startswith(kOCLBuiltinName::Dot4x8PackedPrefix) ||
DemangledName.startswith(kOCLBuiltinName::DotAccSat4x8PackedPrefix)) {
if (CI.getOperand(0)->getType()->isVectorTy()) {
auto *VT = (VectorType *)(CI.getOperand(0)->getType());
if (!isa<llvm::IntegerType>(VT->getElementType())) {
visitCallBuiltinSimple(&CI, MangledName, DemangledName);
return;
}
}
visitCallDot(&CI, MangledName, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::FMin ||
DemangledName == kOCLBuiltinName::FMax ||
DemangledName == kOCLBuiltinName::Min ||
DemangledName == kOCLBuiltinName::Max ||
DemangledName == kOCLBuiltinName::Step ||
DemangledName == kOCLBuiltinName::SmoothStep ||
DemangledName == kOCLBuiltinName::Clamp ||
DemangledName == kOCLBuiltinName::Mix) {
visitCallScalToVec(&CI, MangledName, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::GetImageChannelDataType) {
visitCallGetImageChannel(&CI, DemangledName, OCLImageChannelDataTypeOffset);
return;
}
if (DemangledName == kOCLBuiltinName::GetImageChannelOrder) {
visitCallGetImageChannel(&CI, DemangledName, OCLImageChannelOrderOffset);
return;
}
if (isEnqueueKernelBI(MangledName)) {
visitCallEnqueueKernel(&CI, DemangledName);
return;
}
if (isKernelQueryBI(MangledName)) {
visitCallKernelQuery(&CI, DemangledName);
return;
}
if (DemangledName.find(kOCLBuiltinName::SubgroupBlockReadINTELPrefix) == 0) {
visitSubgroupBlockReadINTEL(&CI);
return;
}
if (DemangledName.find(kOCLBuiltinName::SubgroupBlockWriteINTELPrefix) == 0) {
visitSubgroupBlockWriteINTEL(&CI);
return;
}
if (DemangledName.find(kOCLBuiltinName::SubgroupImageMediaBlockINTELPrefix) ==
0) {
visitSubgroupImageMediaBlockINTEL(&CI, DemangledName);
return;
}
if (DemangledName.find(kOCLBuiltinName::SplitBarrierINTELPrefix) == 0) {
visitCallSplitBarrierINTEL(&CI, DemangledName);
return;
}
// Handle 'cl_intel_device_side_avc_motion_estimation' extension built-ins
if (DemangledName.find(kOCLSubgroupsAVCIntel::Prefix) == 0 ||
// Workaround for a bug in the extension specification
DemangledName.find("intel_sub_group_ime_ref_window_size") == 0) {
if (MangledName.find(kMangledName::Sampler) != StringRef::npos)
visitSubgroupAVCBuiltinCallWithSampler(&CI, DemangledName);
else
visitSubgroupAVCBuiltinCall(&CI, DemangledName);
return;
}
if (DemangledName.find(kOCLBuiltinName::LDEXP) == 0) {
visitCallLdexp(&CI, MangledName, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::ConvertBFloat16AsUShort ||
DemangledName == kOCLBuiltinName::ConvertBFloat162AsUShort2 ||
DemangledName == kOCLBuiltinName::ConvertBFloat163AsUShort3 ||
DemangledName == kOCLBuiltinName::ConvertBFloat164AsUShort4 ||
DemangledName == kOCLBuiltinName::ConvertBFloat168AsUShort8 ||
DemangledName == kOCLBuiltinName::ConvertBFloat1616AsUShort16) {
visitCallConvertBFloat16AsUshort(&CI, DemangledName);
return;
}
if (DemangledName == kOCLBuiltinName::ConvertAsBFloat16Float ||
DemangledName == kOCLBuiltinName::ConvertAsBFloat162Float2 ||
DemangledName == kOCLBuiltinName::ConvertAsBFloat163Float3 ||
DemangledName == kOCLBuiltinName::ConvertAsBFloat164Float4 ||
DemangledName == kOCLBuiltinName::ConvertAsBFloat168Float8 ||
DemangledName == kOCLBuiltinName::ConvertAsBFloat1616Float16) {
visitCallConvertAsBFloat16Float(&CI, DemangledName);
return;
}
visitCallBuiltinSimple(&CI, MangledName, DemangledName);
}
void OCLToSPIRVBase::visitCallNDRange(CallInst *CI, StringRef DemangledName) {
assert(DemangledName.find(kOCLBuiltinName::NDRangePrefix) == 0);
StringRef LenStr = DemangledName.substr(8, 1);
auto Len = atoi(LenStr.data());
assert(Len >= 1 && Len <= 3);
// Translate ndrange_ND into differently named SPIR-V
// decorated functions because they have array arugments
// of different dimension which mangled the same way.
std::string Postfix("_");
Postfix += LenStr;
Postfix += 'D';
std::string FuncName = getSPIRVFuncName(OpBuildNDRange, Postfix);
auto Mutator = mutateCallInst(CI, FuncName);
// SPIR-V ndrange structure requires 3 members in the following order:
// global work offset
// global work size
// local work size
// The arguments need to add missing members.
for (size_t I = 1, E = CI->arg_size(); I != E; ++I)
Mutator.mapArg(I, [=](Value *V) { return getScalarOrArray(V, Len, CI); });
switch (CI->arg_size()) {
case 2: {
// Has global work size.
auto *T = Mutator.getArg(1)->getType();
auto *C = getScalarOrArrayConstantInt(CI, T, Len, 0);
Mutator.appendArg(C);
Mutator.appendArg(C);
break;
}
case 3: {
// Has global and local work size.
auto *T = Mutator.getArg(1)->getType();
Mutator.appendArg(getScalarOrArrayConstantInt(CI, T, Len, 0));
break;
}
case 4: {
// Move offset arg to the end
Mutator.moveArg(1, CI->arg_size() - 1);
break;
}
default:
assert(0 && "Invalid number of arguments");
}
}
void OCLToSPIRVBase::visitCallAsyncWorkGroupCopy(CallInst *CI,
StringRef DemangledName) {
assert(CI->getCalledFunction() && "Unexpected indirect call");
auto Mutator = mutateCallInst(CI, OpGroupAsyncCopy);
if (DemangledName == OCLUtil::kOCLBuiltinName::AsyncWorkGroupCopy)
Mutator.insertArg(3, addSizet(1));
Mutator.insertArg(0, addInt32(ScopeWorkgroup));
}
CallInst *OCLToSPIRVBase::visitCallAtomicCmpXchg(CallInst *CI) {
CallInst *NewCI = nullptr;
{
auto Mutator = mutateCallInst(CI, kOCLBuiltinName::AtomicCmpXchgStrong);
Value *Expected = Mutator.getArg(1);
Type *MemTy = Mutator.getArg(2)->getType();
assert(MemTy->isIntegerTy() &&
"In SPIR-V 1.0 arguments of OpAtomicCompareExchange must be "
"an integer type scalars");
Mutator.mapArg(1, [=](IRBuilder<> &Builder, Value *V) {
return Builder.CreateLoad(MemTy, V, "exp");
});
Mutator.changeReturnType(MemTy, [&](IRBuilder<> &Builder, CallInst *NCI) {
NewCI = NCI;
Builder.CreateStore(NCI, Expected);
return Builder.CreateICmpEQ(NCI, NCI->getArgOperand(1));
});
}
return NewCI;
}
void OCLToSPIRVBase::visitCallAtomicInit(CallInst *CI) {
auto ST = new StoreInst(CI->getArgOperand(1), CI->getArgOperand(0), CI);
ST->takeName(CI);
CI->dropAllReferences();
CI->eraseFromParent();
}
void OCLToSPIRVBase::visitCallAllAny(spv::Op OC, CallInst *CI) {
assert(CI->getCalledFunction() && "Unexpected indirect call");
auto Args = getArguments(CI);
assert(Args.size() == 1);
auto *ArgTy = Args[0]->getType();
auto Zero = Constant::getNullValue(Args[0]->getType());
auto *Cmp = CmpInst::Create(CmpInst::ICmp, CmpInst::ICMP_SLT, Args[0], Zero,
"cast", CI);
if (!isa<VectorType>(ArgTy)) {
auto *Cast = CastInst::CreateZExtOrBitCast(Cmp, Type::getInt32Ty(*Ctx), "",
Cmp->getNextNode());
CI->replaceAllUsesWith(Cast);
CI->eraseFromParent();
} else {
mutateCallInst(CI, OC).setArgs({Cmp}).changeReturnType(
Type::getInt32Ty(*Ctx), [](IRBuilder<> &Builder, CallInst *CI) {
return Builder.CreateZExtOrBitCast(CI, Builder.getInt32Ty());
});
}
}
void OCLToSPIRVBase::visitCallAtomicWorkItemFence(CallInst *CI) {
transMemoryBarrier(CI, getAtomicWorkItemFenceLiterals(CI));
}
void OCLToSPIRVBase::visitCallMemFence(CallInst *CI, StringRef DemangledName) {
OCLMemOrderKind MO = StringSwitch<OCLMemOrderKind>(DemangledName)
.Case(kOCLBuiltinName::ReadMemFence, OCLMO_acquire)
.Case(kOCLBuiltinName::WriteMemFence, OCLMO_release)
.Default(OCLMO_acq_rel); // kOCLBuiltinName::MemFence
transMemoryBarrier(
CI,
std::make_tuple(cast<ConstantInt>(CI->getArgOperand(0))->getZExtValue(),
MO, OCLMS_work_group));
}
void OCLToSPIRVBase::transMemoryBarrier(CallInst *CI,
AtomicWorkItemFenceLiterals Lit) {
assert(CI->getCalledFunction() && "Unexpected indirect call");
mutateCallInst(CI, OpMemoryBarrier)
.setArgs({addInt32(map<Scope>(std::get<2>(Lit))),
addInt32(mapOCLMemSemanticToSPIRV(std::get<0>(Lit),
std::get<1>(Lit)))});
}
void OCLToSPIRVBase::visitCallAtomicLegacy(CallInst *CI, StringRef MangledName,
StringRef DemangledName) {
StringRef Stem = DemangledName;
if (Stem.startswith("atom_"))
Stem = Stem.drop_front(strlen("atom_"));
else if (Stem.startswith("atomic_"))
Stem = Stem.drop_front(strlen("atomic_"));
else
return;
std::string Sign;
std::string Postfix;
std::string Prefix;
if (Stem == "add" || Stem == "sub" || Stem == "and" || Stem == "or" ||
Stem == "xor" || Stem == "min" || Stem == "max") {
if ((Stem == "min" || Stem == "max") &&
isMangledTypeUnsigned(MangledName.back()))
Sign = 'u';
Prefix = "fetch_";
Postfix = "_explicit";
} else if (Stem == "xchg") {
Stem = "exchange";
Postfix = "_explicit";
} else if (Stem == "cmpxchg") {
Stem = "compare_exchange_strong";
Postfix = "_explicit";
} else if (Stem == "inc" || Stem == "dec") {
// do nothing
} else
return;
OCLBuiltinTransInfo Info;
Info.UniqName = "atomic_" + Prefix + Sign + Stem.str() + Postfix;
std::vector<int> PostOps;
PostOps.push_back(OCLLegacyAtomicMemOrder);
if (Stem.startswith("compare_exchange"))
PostOps.push_back(OCLLegacyAtomicMemOrder);
PostOps.push_back(OCLLegacyAtomicMemScope);
Info.PostProc = [=](BuiltinCallMutator &Mutator) {
for (auto &I : PostOps) {
Mutator.appendArg(addInt32(I));
}
};
transAtomicBuiltin(CI, Info);
}
void OCLToSPIRVBase::visitCallAtomicCpp11(CallInst *CI, StringRef MangledName,
StringRef DemangledName) {
StringRef Stem = DemangledName;
if (Stem.startswith("atomic_"))
Stem = Stem.drop_front(strlen("atomic_"));
else
return;
std::string NewStem(Stem);
std::vector<int> PostOps;
if (Stem.startswith("store") || Stem.startswith("load") ||
Stem.startswith("exchange") || Stem.startswith("compare_exchange") ||
Stem.startswith("fetch") || Stem.startswith("flag")) {
if ((Stem.startswith("fetch_min") || Stem.startswith("fetch_max")) &&
containsUnsignedAtomicType(MangledName))
NewStem.insert(NewStem.begin() + strlen("fetch_"), 'u');
if (!Stem.endswith("_explicit")) {
NewStem = NewStem + "_explicit";
PostOps.push_back(OCLMO_seq_cst);
if (Stem.startswith("compare_exchange"))
PostOps.push_back(OCLMO_seq_cst);
PostOps.push_back(OCLMS_device);
} else {
auto MaxOps =
getOCLCpp11AtomicMaxNumOps(Stem.drop_back(strlen("_explicit")));
if (CI->arg_size() < MaxOps)
PostOps.push_back(OCLMS_device);
}
} else if (Stem == "work_item_fence") {
// do nothing
} else
return;
OCLBuiltinTransInfo Info;
Info.UniqName = std::string("atomic_") + NewStem;
Info.PostProc = [=](BuiltinCallMutator &Mutator) {
for (auto &I : PostOps) {
Mutator.appendArg(addInt32(I));
}
};
transAtomicBuiltin(CI, Info);
}
void OCLToSPIRVBase::transAtomicBuiltin(CallInst *CI,
OCLBuiltinTransInfo &Info) {
llvm::Type *AtomicBuiltinsReturnType = CI->getType();
auto SPIRVFunctionName =
getSPIRVFuncName(OCLSPIRVBuiltinMap::map(Info.UniqName));
bool NeedsNegate = false;
if (AtomicBuiltinsReturnType->isFloatingPointTy()) {
// Translate FP-typed atomic builtins. Currently we only need to
// translate atomic_fetch_[add, sub, max, min] and atomic_fetch_[add,
// sub, max, min]_explicit to related float instructions.
// Translate atomic_fetch_sub to OpAtomicFAddEXT with negative value
// operand
auto SPIRFunctionNameForFloatAtomics =
llvm::StringSwitch<std::string>(SPIRVFunctionName)
.Case("__spirv_AtomicIAdd", "__spirv_AtomicFAddEXT")
.Case("__spirv_AtomicISub", "__spirv_AtomicFAddEXT")
.Case("__spirv_AtomicSMax", "__spirv_AtomicFMaxEXT")
.Case("__spirv_AtomicSMin", "__spirv_AtomicFMinEXT")
.Default("others");
if (SPIRVFunctionName == "__spirv_AtomicISub") {
NeedsNegate = true;
}
if (SPIRFunctionNameForFloatAtomics != "others")
SPIRVFunctionName = SPIRFunctionNameForFloatAtomics;
}
auto Mutator = mutateCallInst(CI, SPIRVFunctionName);
Info.PostProc(Mutator);
// Order of args in OCL20:
// object, 0-2 other args, 1-2 order, scope
const size_t NumOrder = getAtomicBuiltinNumMemoryOrderArgs(Info.UniqName);
const size_t ArgsCount = Mutator.arg_size();
const size_t ScopeIdx = ArgsCount - 1;
const size_t OrderIdx = ScopeIdx - NumOrder;
if (NeedsNegate) {
Mutator.mapArg(1, [=](Value *V) {
IRBuilder<> IRB(CI);
return IRB.CreateFNeg(V);
});
}
Mutator.mapArg(ScopeIdx, [=](Value *V) {
return transOCLMemScopeIntoSPIRVScope(V, OCLMS_device, CI);
});
for (size_t I = 0; I < NumOrder; ++I) {
Mutator.mapArg(OrderIdx + I, [=](Value *V) {
return transOCLMemOrderIntoSPIRVMemorySemantics(V, OCLMO_seq_cst, CI);
});
}
// Order of args in SPIR-V:
// object, scope, 1-2 order, 0-2 other args
for (size_t I = 0; I < NumOrder; ++I) {
Mutator.moveArg(OrderIdx + I, I + 1);
}
Mutator.moveArg(ScopeIdx, 1);
if (Info.UniqName.find("atomic_compare_exchange") == 0) {
// For atomic_compare_exchange, the two "other args" are in the opposite
// order from the SPIR-V order. Swap these two arguments.
Mutator.moveArg(Mutator.arg_size() - 1, Mutator.arg_size() - 2);
}
}
void OCLToSPIRVBase::visitCallBarrier(CallInst *CI) {
auto Lit = getBarrierLiterals(CI);
// Use sequential consistent memory order by default.
// But if the flags argument is set to 0, we use
// None(Relaxed) memory order.
unsigned MemFenceFlag = std::get<0>(Lit);
OCLMemOrderKind MemOrder = MemFenceFlag ? OCLMO_seq_cst : OCLMO_relaxed;
mutateCallInst(CI, OpControlBarrier)
.setArgs({// Execution scope
addInt32(map<Scope>(std::get<2>(Lit))),
// Memory scope
addInt32(map<Scope>(std::get<1>(Lit))),
// Memory semantics
addInt32(mapOCLMemSemanticToSPIRV(MemFenceFlag, MemOrder))});
}
void OCLToSPIRVBase::visitCallConvert(CallInst *CI, StringRef MangledName,
StringRef DemangledName) {
if (eraseUselessConvert(CI, MangledName, DemangledName))
return;
Op OC = OpNop;
auto TargetTy = CI->getType();
auto SrcTy = CI->getArgOperand(0)->getType();
if (auto *VecTy = dyn_cast<VectorType>(TargetTy))
TargetTy = VecTy->getElementType();
if (auto *VecTy = dyn_cast<VectorType>(SrcTy))
SrcTy = VecTy->getElementType();
auto IsTargetInt = isa<IntegerType>(TargetTy);
std::string TargetTyName(
DemangledName.substr(strlen(kOCLBuiltinName::ConvertPrefix)));
auto FirstUnderscoreLoc = TargetTyName.find('_');
if (FirstUnderscoreLoc != std::string::npos)
TargetTyName = TargetTyName.substr(0, FirstUnderscoreLoc);
TargetTyName = std::string("_R") + TargetTyName;
std::string Sat = DemangledName.find("_sat") != StringRef::npos ? "_sat" : "";
auto TargetSigned = DemangledName[8] != 'u';
if (isa<IntegerType>(SrcTy)) {
bool Signed = isLastFuncParamSigned(MangledName);
if (IsTargetInt) {
if (!Sat.empty() && TargetSigned != Signed) {
OC = Signed ? OpSatConvertSToU : OpSatConvertUToS;
Sat = "";
} else
OC = Signed ? OpSConvert : OpUConvert;
} else
OC = Signed ? OpConvertSToF : OpConvertUToF;
} else {
if (IsTargetInt) {
OC = TargetSigned ? OpConvertFToS : OpConvertFToU;
} else
OC = OpFConvert;
}
auto Loc = DemangledName.find("_rt");
std::string Rounding;
if (Loc != StringRef::npos && !(isa<IntegerType>(SrcTy) && IsTargetInt)) {
Rounding = DemangledName.substr(Loc, 4).str();
}
assert(CI->getCalledFunction() && "Unexpected indirect call");
mutateCallInst(CI, getSPIRVFuncName(OC, TargetTyName + Sat + Rounding));
}
void OCLToSPIRVBase::visitCallGroupBuiltin(CallInst *CI,
StringRef OrigDemangledName) {
auto F = CI->getCalledFunction();
std::vector<int> PreOps;
std::string DemangledName{OrigDemangledName};
if (DemangledName == kOCLBuiltinName::WorkGroupBarrier)
return;
if (DemangledName == kOCLBuiltinName::WaitGroupEvent) {
PreOps.push_back(ScopeWorkgroup);
} else if (DemangledName.find(kOCLBuiltinName::WorkGroupPrefix) == 0) {
DemangledName.erase(0, strlen(kOCLBuiltinName::WorkPrefix));
PreOps.push_back(ScopeWorkgroup);
} else if (DemangledName.find(kOCLBuiltinName::SubGroupPrefix) == 0) {
DemangledName.erase(0, strlen(kOCLBuiltinName::SubPrefix));
PreOps.push_back(ScopeSubgroup);
} else
return;
if (DemangledName != kOCLBuiltinName::WaitGroupEvent) {
StringRef FuncName = DemangledName;
FuncName = FuncName.drop_front(strlen(kSPIRVName::GroupPrefix));
SPIRSPIRVGroupOperationMap::foreachConditional(
[&](const std::string &S, SPIRVGroupOperationKind G) {
if (!FuncName.startswith(S))
return true; // continue
PreOps.push_back(G);
StringRef Op =
StringSwitch<StringRef>(FuncName)
.StartsWith("ballot", "group_ballot_bit_count_")
.StartsWith("non_uniform", kSPIRVName::GroupNonUniformPrefix)
.Default(kSPIRVName::GroupPrefix);
// clustered functions are handled with non uniform group opcodes
StringRef ClusteredOp =
FuncName.contains("clustered_") ? "non_uniform_" : "";
StringRef LogicalOp = FuncName.contains("logical_") ? "logical_" : "";
StringRef GroupOp = StringSwitch<StringRef>(FuncName)
.Case("ballot_bit_count", "add")
.Case("ballot_inclusive_scan", "add")
.Case("ballot_exclusive_scan", "add")
.Default(FuncName.take_back(
3)); // assumes op is three characters
GroupOp.consume_front("_"); // when op is two characters
assert(!GroupOp.empty() && "Invalid OpenCL group builtin function");
char OpTyC = 0;
auto OpTy = F->getReturnType();
if (OpTy->isFloatingPointTy())
OpTyC = 'f';
else if (OpTy->isIntegerTy()) {
auto NeedSign = GroupOp == "max" || GroupOp == "min";
if (!NeedSign)
OpTyC = 'i';
else {
// clustered reduce args are (type, uint)
// other operation args are (type)
auto MangledName = F->getName();
auto MangledTyC = ClusteredOp.empty()
? MangledName.back()
: MangledName.take_back(2).front();
if (isMangledTypeSigned(MangledTyC))
OpTyC = 's';
else
OpTyC = 'u';
}
} else
llvm_unreachable("Invalid OpenCL group builtin argument type");
DemangledName = Op.str() + ClusteredOp.str() + LogicalOp.str() +
OpTyC + GroupOp.str();
return false; // break out of loop
});
}
const bool IsElect = DemangledName == "group_elect";
const bool IsAllOrAny = (DemangledName.find("_all") != std::string::npos ||
DemangledName.find("_any") != std::string::npos);
const bool IsAllEqual = DemangledName.find("_all_equal") != std::string::npos;
const bool IsBallot = DemangledName == "group_ballot";
const bool IsInverseBallot = DemangledName == "group_inverse_ballot";
const bool IsBallotBitExtract = DemangledName == "group_ballot_bit_extract";
const bool IsLogical = DemangledName.find("_logical") != std::string::npos;
const bool HasBoolReturnType = IsElect || IsAllOrAny || IsAllEqual ||
IsInverseBallot || IsBallotBitExtract ||
IsLogical;
const bool HasBoolArg = (IsAllOrAny && !IsAllEqual) || IsBallot || IsLogical;
auto Consts = getInt32(M, PreOps);
OCLBuiltinTransInfo Info;
if (HasBoolReturnType)
Info.RetTy = Type::getInt1Ty(*Ctx);
Info.UniqName = DemangledName;
Info.PostProc = [=](BuiltinCallMutator &Mutator) {
if (HasBoolArg) {
Mutator.mapArg(0, [&](Value *V) {
IRBuilder<> IRB(CI);
return IRB.CreateICmpNE(V, IRB.getInt32(0));
});
}
size_t E = Mutator.arg_size();
if (DemangledName == "group_broadcast" && E > 2) {
assert(E == 3 || E == 4);
std::vector<Value *> Ops = getArguments(CI);
makeVector(CI, Ops, std::make_pair(Ops.begin() + 1, Ops.end()));
while (Mutator.arg_size() > 1)
Mutator.removeArg(1);
Mutator.appendArg(Ops.back());
}
for (unsigned I = 0; I < Consts.size(); I++)
Mutator.insertArg(I, Consts[I]);
};
transBuiltin(CI, Info);
}
void OCLToSPIRVBase::transBuiltin(CallInst *CI, OCLBuiltinTransInfo &Info) {
Op OC = OpNop;
unsigned ExtOp = ~0U;
SPIRVBuiltinVariableKind BVKind = BuiltInMax;
if (StringRef(Info.UniqName).startswith(kSPIRVName::Prefix))
return;
if (OCLSPIRVBuiltinMap::find(Info.UniqName, &OC)) {
if (OC == OpImageRead) {
// There are several read_image* functions defined by OpenCL C spec, but
// all of them use the same SPIR-V Instruction - some of them might only
// differ by return type, so, we need to include return type into the
// mangling scheme to get them differentiated.
//
// Example: int4 read_imagei(image2d_t, sampler_t, int2)
// uint4 read_imageui(image2d_t, sampler_t, int2)
// Both functions above are represented by the same SPIR-V
// instruction: argument types are the same, only return type is
// different
Info.UniqName = getSPIRVFuncName(OC, CI->getType());
} else {
Info.UniqName = getSPIRVFuncName(OC);
}
} else if ((ExtOp = getExtOp(Info.MangledName, Info.UniqName)) != ~0U)
Info.UniqName = getSPIRVExtFuncName(SPIRVEIS_OpenCL, ExtOp);
else if (SPIRSPIRVBuiltinVariableMap::find(Info.UniqName, &BVKind)) {
// Map OCL work item builtins to SPV-IR work item builtins.
// e.g. get_global_id() --> __spirv_BuiltinGlobalInvocationId()
Info.UniqName = getSPIRVFuncName(BVKind);
} else
return;
auto Mutator = mutateCallInst(CI, Info.UniqName + Info.Postfix);
Info.PostProc(Mutator);
if (Info.RetTy) {
Type *OldRetTy = CI->getType();
Mutator.changeReturnType(
Info.RetTy, [&](IRBuilder<> &Builder, CallInst *NewCI) {
if (Info.RetTy->isIntegerTy() && OldRetTy->isIntegerTy())
return Builder.CreateIntCast(NewCI, OldRetTy, Info.IsRetSigned);
else
return Builder.CreatePointerBitCastOrAddrSpaceCast(NewCI, OldRetTy);
});
}
}
void OCLToSPIRVBase::visitCallReadImageMSAA(CallInst *CI,
StringRef MangledName) {
assert(MangledName.find("msaa") != StringRef::npos);
mutateCallInst(
CI, getSPIRVFuncName(OpImageRead, std::string(kSPIRVPostfix::ExtDivider) +
getPostfixForReturnType(CI)))
.insertArg(2, getInt32(M, ImageOperandsSampleMask));
}
void OCLToSPIRVBase::visitCallReadImageWithSampler(CallInst *CI,
StringRef MangledName,
StringRef DemangledName) {
assert(MangledName.find(kMangledName::Sampler) != StringRef::npos);
assert(CI->getCalledFunction() && "Unexpected indirect call");
Function *Func = CI->getCalledFunction();
bool IsRetScalar = !CI->getType()->isVectorTy();
Type *Ret = CI->getType();
auto *ImageTy = OCLTypeToSPIRVPtr->getAdaptedArgumentType(Func, 0);
if (!ImageTy)
ImageTy = getCallValueType(CI, 0);
auto Mutator = mutateCallInst(
CI, getSPIRVFuncName(OpImageSampleExplicitLod,
std::string(kSPIRVPostfix::ExtDivider) +
getPostfixForReturnType(Ret)));
Mutator.mapArg(0, [&](IRBuilder<> &Builder, Value *ImgArg, Type *ImgType) {
auto *SampledImgTy = adjustImageType(ImageTy, kSPIRVTypeName::Image,
kSPIRVTypeName::SampledImg);
Value *SampledImgArgs[] = {CI->getArgOperand(0), CI->getArgOperand(1)};
return addSPIRVCallPair(Builder, OpSampledImage, SampledImgTy,
SampledImgArgs, {ImgType, Mutator.getType(1)},
kSPIRVName::TempSampledImage);
});
Mutator.removeArg(1);
unsigned ImgOpMask = getImageSignZeroExt(DemangledName);
unsigned ImgOpMaskInsIndex = Mutator.arg_size();
switch (Mutator.arg_size()) {
case 2: // no lod
ImgOpMask |= ImageOperandsMask::ImageOperandsLodMask;
ImgOpMaskInsIndex = Mutator.arg_size();
Mutator.appendArg(getFloat32(M, 0.f));
break;
case 3: // explicit lod
ImgOpMask |= ImageOperandsMask::ImageOperandsLodMask;
ImgOpMaskInsIndex = 2;
break;
case 4: // gradient
ImgOpMask |= ImageOperandsMask::ImageOperandsGradMask;
ImgOpMaskInsIndex = 2;
break;
default:
assert(0 && "read_image* with unhandled number of args!");
}
Mutator.insertArg(ImgOpMaskInsIndex, getInt32(M, ImgOpMask));
// SPIR-V instruction always returns 4-element vector
if (IsRetScalar)
Mutator.changeReturnType(FixedVectorType::get(Ret, 4),
[=](IRBuilder<> &Builder, CallInst *NewCI) {
return Builder.CreateExtractElement(
NewCI, getSizet(M, 0));
});
}
void OCLToSPIRVBase::visitCallGetImageSize(CallInst *CI,
StringRef DemangledName) {
auto Desc = getImageDescriptor(getCallValueType(CI, 0));
unsigned Dim = getImageDimension(Desc.Dim) + Desc.Arrayed;
assert(Dim > 0 && "Invalid image dimension.");
assert(CI->arg_size() == 1);