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/*========================== begin_copyright_notice ============================
Copyright (C) 2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
//
// Legacy SPIRVDLL-like interface for translation of SPIRV to LLVM IR.
//
//===----------------------------------------------------------------------===//
#include "SPIRVWrapper.h"
#include "vc/Support/Status.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/IR/Verifier.h"
#include "LLVMSPIRVLib.h"
#include "Probe/Assertion.h"
#include <sstream>
using namespace llvm;
namespace {
using SpirvReadVerifyType = int(
const char *pIn, size_t InSz, const uint32_t *SpecConstIds,
const uint64_t *SpecConstVals, unsigned SpecConstSz,
void (*OutSaver)(const char *pOut, size_t OutSize, void *OutUserData),
void *OutUserData, void (*ErrSaver)(const char *pErrMsg, void *ErrUserData),
void *ErrUserData);
int spirvReadVerify(const char *pIn, size_t InSz, const uint32_t *SpecConstIds,
const uint64_t *SpecConstVals, unsigned SpecConstSz,
void (*OutSaver)(const char *pOut, size_t OutSize,
void *OutUserData),
void *OutUserData,
void (*ErrSaver)(const char *pErrMsg, void *ErrUserData),
void *ErrUserData) {
llvm::LLVMContext Context;
llvm::StringRef SpirvInput = llvm::StringRef(pIn, InSz);
std::istringstream IS(SpirvInput.str());
std::unique_ptr<llvm::Module> M;
{
llvm::Module *SpirM;
std::string ErrMsg;
SPIRV::TranslatorOpts Opts;
Opts.enableAllExtensions();
Opts.setFPContractMode(SPIRV::FPContractMode::On);
Opts.setDesiredBIsRepresentation(SPIRV::BIsRepresentation::SPIRVFriendlyIR);
// Add specialization constants
for (unsigned i = 0; i < SpecConstSz; ++i)
Opts.setSpecConst(SpecConstIds[i], SpecConstVals[i]);
// This returns true on success...
bool Status = llvm::readSpirv(Context, Opts, IS, SpirM, ErrMsg);
if (!Status) {
std::ostringstream OSS;
OSS << "spirv_read_verify: readSpirv failed: " << ErrMsg;
ErrSaver(OSS.str().c_str(), ErrUserData);
return -1;
}
Status = llvm::verifyModule(*SpirM);
if (Status) {
ErrSaver("spirv_read_verify: verify Module failed", ErrUserData);
return -1;
}
M.reset(SpirM);
}
llvm::SmallVector<char, 16> CloneBuffer;
llvm::raw_svector_ostream CloneOstream(CloneBuffer);
WriteBitcodeToFile(*M, CloneOstream);
IGC_ASSERT(CloneBuffer.size() > 0);
OutSaver(CloneBuffer.data(), CloneBuffer.size(), OutUserData);
return 0;
}
Expected<SpirvReadVerifyType *> getSpirvReadVerifyFunction() {
return &spirvReadVerify;
}
} // namespace
Expected<std::vector<char>>
vc::translateSPIRVToIR(ArrayRef<char> Input, ArrayRef<uint32_t> SpecConstIds,
ArrayRef<uint64_t> SpecConstValues) {
IGC_ASSERT(SpecConstIds.size() == SpecConstValues.size());
auto OutSaver = [](const char *pOut, size_t OutSize, void *OutData) {
auto *Vec = reinterpret_cast<std::vector<char> *>(OutData);
Vec->assign(pOut, pOut + OutSize);
};
auto ErrSaver = [](const char *pErrMsg, void *ErrData) {
auto *ErrStr = reinterpret_cast<std::string *>(ErrData);
*ErrStr = pErrMsg;
};
std::string ErrMsg;
std::vector<char> Result;
auto SpirvReadVerifyFunctionExp = getSpirvReadVerifyFunction();
if (!SpirvReadVerifyFunctionExp)
return SpirvReadVerifyFunctionExp.takeError();
auto *SpirvReadVerifyFunction = SpirvReadVerifyFunctionExp.get();
int Status = SpirvReadVerifyFunction(
Input.data(), Input.size(), SpecConstIds.data(), SpecConstValues.data(),
SpecConstValues.size(), OutSaver, &Result, ErrSaver, &ErrMsg);
if (Status != 0)
return make_error<vc::BadSpirvError>(ErrMsg);
return {std::move(Result)};
}
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