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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 "OCLTypeToSPIRV.h"
#include "OCLUtil.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/InstVisitor.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/Pass.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);
}
class OCLToSPIRV : public ModulePass, public InstVisitor<OCLToSPIRV> {
public:
OCLToSPIRV() : ModulePass(ID), M(nullptr), Ctx(nullptr), CLVer(0) {
initializeOCLToSPIRVPass(*PassRegistry::getPassRegistry());
}
bool runOnModule(Module &M) override;
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.addRequired<OCLTypeToSPIRV>();
}
virtual void visitCallInst(CallInst &CI);
/// Transform barrier/work_group_barrier/sub_group_barrier
/// to __spirv_ControlBarrier.
/// barrier(flag) =>
/// __spirv_ControlBarrier(workgroup, workgroup, map(flag))
/// work_group_barrier(scope, flag) =>
/// __spirv_ControlBarrier(workgroup, map(scope), map(flag))
/// sub_group_barrier(scope, flag) =>
/// __spirv_ControlBarrier(subgroup, map(scope), map(flag))
void visitCallBarrier(CallInst *CI);
/// Erase useless convert functions.
/// \return true if the call instruction is erased.
bool eraseUselessConvert(CallInst *Call, StringRef MangledName,
StringRef DeMangledName);
/// Transform convert_ to
/// __spirv_{CastOpName}_R{TargeTyName}{_sat}{_rt[p|n|z|e]}
void visitCallConvert(CallInst *CI, StringRef MangledName,
StringRef DemangledName);
/// Transform async_work_group{_strided}_copy.
/// async_work_group_copy(dst, src, n, event)
/// => async_work_group_strided_copy(dst, src, n, 1, event)
/// async_work_group_strided_copy(dst, src, n, stride, event)
/// => __spirv_AsyncGroupCopy(ScopeWorkGroup, dst, src, n, stride, event)
void visitCallAsyncWorkGroupCopy(CallInst *CI, StringRef DemangledName);
/// Transform OCL builtin function to SPIR-V builtin function.
void transBuiltin(CallInst *CI, OCLBuiltinTransInfo &Info);
/// Transform OCL work item builtin functions to SPIR-V builtin variables.
void transWorkItemBuiltinsToVariables();
/// Transform atomic_work_item_fence/mem_fence to __spirv_MemoryBarrier.
/// func(flag, order, scope) =>
/// __spirv_MemoryBarrier(map(scope), map(flag)|map(order))
void transMemoryBarrier(CallInst *CI, AtomicWorkItemFenceLiterals);
/// Transform all to __spirv_Op(All|Any). Note that the types mismatch so
// some extra code is emitted to convert between the two.
void visitCallAllAny(spv::Op OC, CallInst *CI);
/// Transform atomic_* to __spirv_Atomic*.
/// atomic_x(ptr_arg, args, order, scope) =>
/// __spirv_AtomicY(ptr_arg, map(order), map(scope), args)
void transAtomicBuiltin(CallInst *CI, OCLBuiltinTransInfo &Info);
/// Transform atomic_work_item_fence to __spirv_MemoryBarrier.
/// atomic_work_item_fence(flag, order, scope) =>
/// __spirv_MemoryBarrier(map(scope), map(flag)|map(order))
void visitCallAtomicWorkItemFence(CallInst *CI);
/// Transform atomic_compare_exchange call.
/// In atomic_compare_exchange, the expected value parameter is a pointer.
/// However in SPIR-V it is a value. The transformation adds a load
/// instruction, result of which is passed to atomic_compare_exchange as
/// argument.
/// The transformation adds a store instruction after the call, to update the
/// value in expected with the value pointed to by object. Though, it is not
/// necessary in case they are equal, this approach makes result code simpler.
/// Also ICmp instruction is added, because the call must return result of
/// comparison.
/// \returns the call instruction of atomic_compare_exchange_strong.
CallInst *visitCallAtomicCmpXchg(CallInst *CI);
/// Transform atomic_init.
/// atomic_init(p, x) => store p, x
void visitCallAtomicInit(CallInst *CI);
/// Transform legacy OCL 1.x atomic builtins to SPIR-V builtins for extensions
/// cl_khr_int64_base_atomics
/// cl_khr_int64_extended_atomics
/// Do nothing if the called function is not a legacy atomic builtin.
void visitCallAtomicLegacy(CallInst *CI, StringRef MangledName,
StringRef DemangledName);
/// Transform OCL 2.0 C++11 atomic builtins to SPIR-V builtins.
/// Do nothing if the called function is not a C++11 atomic builtin.
void visitCallAtomicCpp11(CallInst *CI, StringRef MangledName,
StringRef DemangledName);
/// Transform OCL builtin function to SPIR-V builtin function.
/// Assuming there is a simple name mapping without argument changes.
/// Should be called at last.
void visitCallBuiltinSimple(CallInst *CI, StringRef MangledName,
StringRef DemangledName);
/// Transform get_image_{width|height|depth|dim}.
/// get_image_xxx(...) =>
/// dimension = __spirv_ImageQuerySizeLod_R{ReturnType}(...);
/// return dimension.{x|y|z};
void visitCallGetImageSize(CallInst *CI, StringRef DemangledName);
/// Transform {work|sub}_group_x =>
/// __spirv_{OpName}
///
/// Special handling of work_group_broadcast.
/// work_group_broadcast(a, x, y, z)
/// =>
/// __spirv_GroupBroadcast(a, vec3(x, y, z))
void visitCallGroupBuiltin(CallInst *CI, StringRef DemangledName);
/// Transform mem_fence to __spirv_MemoryBarrier.
/// mem_fence(flag) => __spirv_MemoryBarrier(Workgroup, map(flag))
void visitCallMemFence(CallInst *CI);
void visitCallNDRange(CallInst *CI, StringRef DemangledName);
/// Transform read_image with sampler arguments.
/// read_image(image, sampler, ...) =>
/// sampled_image = __spirv_SampledImage(image, sampler);
/// return __spirv_ImageSampleExplicitLod_R{ReturnType}(sampled_image, ...);
void visitCallReadImageWithSampler(CallInst *CI, StringRef MangledName);
/// Transform read_image with msaa image arguments.
/// Sample argument must be acoded as Image Operand.
void visitCallReadImageMSAA(CallInst *CI, StringRef MangledName);
/// Transform {read|write}_image without sampler arguments.
void visitCallReadWriteImage(CallInst *CI, StringRef DemangledName);
/// Transform to_{global|local|private}.
///
/// T* a = ...;
/// addr T* b = to_addr(a);
/// =>
/// i8* x = cast<i8*>(a);
/// addr i8* y = __spirv_GenericCastToPtr_ToAddr(x);
/// addr T* b = cast<addr T*>(y);
void visitCallToAddr(CallInst *CI, StringRef DemangledName);
/// Transform return type of relatinal built-in functions like isnan, isfinite
/// to boolean values.
void visitCallRelational(CallInst *CI, StringRef DemangledName);
/// Transform vector load/store functions to SPIR-V extended builtin
/// functions
/// {vload|vstore{a}}{_half}{n}{_rte|_rtz|_rtp|_rtn} =>
/// __spirv_ocl_{ExtendedInstructionOpCodeName}__R{ReturnType}
void visitCallVecLoadStore(CallInst *CI, StringRef MangledName,
StringRef DemangledName);
/// Transforms get_mem_fence built-in to SPIR-V function and aligns result
/// values with SPIR 1.2. get_mem_fence(ptr) => __spirv_GenericPtrMemSemantics
/// GenericPtrMemSemantics valid values are 0x100, 0x200 and 0x300, where is
/// SPIR 1.2 defines them as 0x1, 0x2 and 0x3, so this function adjusts
/// GenericPtrMemSemantics results to SPIR 1.2 values.
void visitCallGetFence(CallInst *CI, StringRef DemangledName);
/// Transforms OpDot instructions with a scalar type to a fmul instruction
void visitCallDot(CallInst *CI);
/// Fixes for built-in functions with vector+scalar arguments that are
/// translated to the SPIR-V instructions where all arguments must have the
/// same type.
void visitCallScalToVec(CallInst *CI, StringRef MangledName,
StringRef DemangledName);
/// Transform get_image_channel_{order|data_type} built-in functions to
/// __spirv_ocl_{ImageQueryOrder|ImageQueryFormat}
void visitCallGetImageChannel(CallInst *CI, StringRef DemangledName,
unsigned int Offset);
/// Transform enqueue_kernel and kernel query built-in functions to
/// spirv-friendly format filling arguments, required for device-side enqueue
/// instructions, but missed in the original call
void visitCallEnqueueKernel(CallInst *CI, StringRef DemangledName);
void visitCallKernelQuery(CallInst *CI, StringRef DemangledName);
/// For cl_intel_subgroups block read built-ins:
void visitSubgroupBlockReadINTEL(CallInst *CI);
/// For cl_intel_subgroups block write built-ins:
void visitSubgroupBlockWriteINTEL(CallInst *CI);
/// For cl_intel_media_block_io built-ins:
void visitSubgroupImageMediaBlockINTEL(CallInst *CI, StringRef DemangledName);
// For cl_intel_device_side_avc_motion_estimation built-ins
void visitSubgroupAVCBuiltinCall(CallInst *CI, StringRef DemangledName);
void visitSubgroupAVCWrapperBuiltinCall(CallInst *CI, Op WrappedOC,
StringRef DemangledName);
void visitSubgroupAVCBuiltinCallWithSampler(CallInst *CI,
StringRef DemangledName);
static char ID;
private:
Module *M;
LLVMContext *Ctx;
unsigned CLVer; /// OpenCL version as major*10+minor
std::set<Value *> ValuesToDelete;
ConstantInt *addInt32(int I) { return getInt32(M, I); }
ConstantInt *addSizet(uint64_t I) { return getSizet(M, I); }
/// Get vector width from OpenCL vload* function name.
SPIRVWord 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 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 OCLToSPIRV::ID = 0;
bool OCLToSPIRV::runOnModule(Module &Module) {
M = &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");
transWorkItemBuiltinsToVariables();
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 OCLToSPIRV::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) {
visitCallMemFence(&CI);
return;
}
if (DemangledName.find(kOCLBuiltinName::ReadImage) == 0) {
if (MangledName.find(kMangledName::Sampler) != StringRef::npos) {
visitCallReadImageWithSampler(&CI, MangledName);
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()->isVectorTy())) {
visitCallDot(&CI);
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;
}
// 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;
}
visitCallBuiltinSimple(&CI, MangledName, DemangledName);
}
void OCLToSPIRV::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);
// 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.
AttributeList Attrs = CI->getCalledFunction()->getAttributes();
mutateCallInstSPIRV(
M, CI,
[=](CallInst *, std::vector<Value *> &Args) {
for (size_t I = 1, E = Args.size(); I != E; ++I)
Args[I] = getScalarOrArray(Args[I], Len, CI);
switch (Args.size()) {
case 2: {
// Has global work size.
auto T = Args[1]->getType();
auto C = getScalarOrArrayConstantInt(CI, T, Len, 0);
Args.push_back(C);
Args.push_back(C);
} break;
case 3: {
// Has global and local work size.
auto T = Args[1]->getType();
Args.push_back(getScalarOrArrayConstantInt(CI, T, Len, 0));
} break;
case 4: {
// Move offset arg to the end
auto OffsetPos = Args.begin() + 1;
Value *OffsetVal = *OffsetPos;
Args.erase(OffsetPos);
Args.push_back(OffsetVal);
} break;
default:
assert(0 && "Invalid number of arguments");
}
// 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';
return getSPIRVFuncName(OpBuildNDRange, Postfix);
},
&Attrs);
}
void OCLToSPIRV::visitCallAsyncWorkGroupCopy(CallInst *CI,
StringRef DemangledName) {
assert(CI->getCalledFunction() && "Unexpected indirect call");
AttributeList Attrs = CI->getCalledFunction()->getAttributes();
mutateCallInstSPIRV(
M, CI,
[=](CallInst *, std::vector<Value *> &Args) {
if (DemangledName == OCLUtil::kOCLBuiltinName::AsyncWorkGroupCopy) {
Args.insert(Args.begin() + 3, addSizet(1));
}
Args.insert(Args.begin(), addInt32(ScopeWorkgroup));
return getSPIRVFuncName(OpGroupAsyncCopy);
},
&Attrs);
}
CallInst *OCLToSPIRV::visitCallAtomicCmpXchg(CallInst *CI) {
AttributeList Attrs = CI->getCalledFunction()->getAttributes();
Value *Expected = nullptr;
CallInst *NewCI = nullptr;
mutateCallInstOCL(
M, CI,
[&](CallInst *CI, std::vector<Value *> &Args, Type *&RetTy) {
Expected = Args[1]; // temporary save second argument.
Args[1] = new LoadInst(Args[1]->getType()->getPointerElementType(),
Args[1], "exp", false, CI);
RetTy = Args[2]->getType();
assert(Args[0]->getType()->getPointerElementType()->isIntegerTy() &&
Args[1]->getType()->isIntegerTy() &&
Args[2]->getType()->isIntegerTy() &&
"In SPIR-V 1.0 arguments of OpAtomicCompareExchange must be "
"an integer type scalars");
return kOCLBuiltinName::AtomicCmpXchgStrong;
},
[&](CallInst *NCI) -> Instruction * {
NewCI = NCI;
Instruction *Store = new StoreInst(NCI, Expected, NCI->getNextNode());
return new ICmpInst(Store->getNextNode(), CmpInst::ICMP_EQ, NCI,
NCI->getArgOperand(1));
},
&Attrs);
return NewCI;
}
void OCLToSPIRV::visitCallAtomicInit(CallInst *CI) {
auto ST = new StoreInst(CI->getArgOperand(1), CI->getArgOperand(0), CI);
ST->takeName(CI);
CI->dropAllReferences();
CI->eraseFromParent();
}
void OCLToSPIRV::visitCallAllAny(spv::Op OC, CallInst *CI) {
assert(CI->getCalledFunction() && "Unexpected indirect call");
AttributeList Attrs = CI->getCalledFunction()->getAttributes();
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 {
mutateCallInstSPIRV(
M, CI,
[&](CallInst *, std::vector<Value *> &Args, Type *&Ret) {
Args[0] = Cmp;
Ret = Type::getInt1Ty(*Ctx);
return getSPIRVFuncName(OC);
},
[&](CallInst *CI) -> Instruction * {
return CastInst::CreateZExtOrBitCast(CI, Type::getInt32Ty(*Ctx), "",
CI->getNextNode());
},
&Attrs);
}
}
void OCLToSPIRV::visitCallAtomicWorkItemFence(CallInst *CI) {
transMemoryBarrier(CI, getAtomicWorkItemFenceLiterals(CI));
}
void OCLToSPIRV::visitCallMemFence(CallInst *CI) {
transMemoryBarrier(
CI,
std::make_tuple(cast<ConstantInt>(CI->getArgOperand(0))->getZExtValue(),
OCLMO_relaxed, OCLMS_work_group));
}
void OCLToSPIRV::transMemoryBarrier(CallInst *CI,
AtomicWorkItemFenceLiterals Lit) {
assert(CI->getCalledFunction() && "Unexpected indirect call");
AttributeList Attrs = CI->getCalledFunction()->getAttributes();
mutateCallInstSPIRV(
M, CI,
[=](CallInst *, std::vector<Value *> &Args) {
Args.resize(2);
Args[0] = addInt32(map<Scope>(std::get<2>(Lit)));
Args[1] = addInt32(
mapOCLMemSemanticToSPIRV(std::get<0>(Lit), std::get<1>(Lit)));
return getSPIRVFuncName(OpMemoryBarrier);
},
&Attrs);
}
void OCLToSPIRV::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 = [=](std::vector<Value *> &Ops) {
for (auto &I : PostOps) {
Ops.push_back(addInt32(I));
}
};
transAtomicBuiltin(CI, Info);
}
void OCLToSPIRV::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->getNumArgOperands() < 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 = [=](std::vector<Value *> &Ops) {
for (auto &I : PostOps) {
Ops.push_back(addInt32(I));
}
};
transAtomicBuiltin(CI, Info);
}
void OCLToSPIRV::transAtomicBuiltin(CallInst *CI, OCLBuiltinTransInfo &Info) {
AttributeList Attrs = CI->getCalledFunction()->getAttributes();
mutateCallInstSPIRV(
M, CI,
[=](CallInst *CI, std::vector<Value *> &Args) {
Info.PostProc(Args);
// 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 = Args.size();
const size_t ScopeIdx = ArgsCount - 1;
const size_t OrderIdx = ScopeIdx - NumOrder;
Args[ScopeIdx] =
transOCLMemScopeIntoSPIRVScope(Args[ScopeIdx], OCLMS_device, CI);
for (size_t I = 0; I < NumOrder; ++I) {
Args[OrderIdx + I] = transOCLMemOrderIntoSPIRVMemorySemantics(
Args[OrderIdx + I], OCLMO_seq_cst, CI);
}
// Order of args in SPIR-V:
// object, scope, 1-2 order, 0-2 other args
std::swap(Args[1], Args[ScopeIdx]);
if (OrderIdx > 2) {
// For atomic_compare_exchange the swap above puts Comparator/Expected
// argument just where it should be, so don't move the last argument
// then.
int Offset =
Info.UniqName.find("atomic_compare_exchange") == 0 ? 1 : 0;
std::rotate(Args.begin() + 2, Args.begin() + OrderIdx,
Args.end() - Offset);
}
return getSPIRVFuncName(OCLSPIRVBuiltinMap::map(Info.UniqName));
},
&Attrs);
}
void OCLToSPIRV::visitCallBarrier(CallInst *CI) {
auto Lit = getBarrierLiterals(CI);
AttributeList Attrs = CI->getCalledFunction()->getAttributes();
mutateCallInstSPIRV(
M, CI,
[=](CallInst *, std::vector<Value *> &Args) {
Args.resize(3);
// Execution scope
Args[0] = addInt32(map<Scope>(std::get<2>(Lit)));
// Memory scope
Args[1] = addInt32(map<Scope>(std::get<1>(Lit)));
// 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;
Args[2] = addInt32(mapOCLMemSemanticToSPIRV(
MemFenceFlag, MemOrder)); // Memory semantics
return getSPIRVFuncName(OpControlBarrier);
},
&Attrs);
}
void OCLToSPIRV::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");
AttributeList Attrs = CI->getCalledFunction()->getAttributes();
mutateCallInstSPIRV(
M, CI,
[=](CallInst *, std::vector<Value *> &Args) {
return getSPIRVFuncName(OC, TargetTyName + Sat + Rounding);
},
&Attrs);
}
void OCLToSPIRV::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;