308571074c
This is an artifact from merging MLIR into LLVM, the file headers are now aligned with the rest of the project.
147 lines
5.2 KiB
C++
147 lines
5.2 KiB
C++
//===- TranslateRegistration.cpp - hooks to mlir-translate ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a translation from SPIR-V binary module to MLIR SPIR-V
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// ModuleOp.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/SPIRV/SPIRVOps.h"
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#include "mlir/Dialect/SPIRV/Serialization.h"
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#include "mlir/IR/Builders.h"
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#include "mlir/IR/Function.h"
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#include "mlir/IR/Module.h"
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#include "mlir/Parser.h"
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#include "mlir/Support/FileUtilities.h"
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#include "mlir/Translation.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SMLoc.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/ToolOutputFile.h"
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using namespace mlir;
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//===----------------------------------------------------------------------===//
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// Deserialization registration
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//===----------------------------------------------------------------------===//
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// Deserializes the SPIR-V binary module stored in the file named as
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// `inputFilename` and returns a module containing the SPIR-V module.
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static OwningModuleRef deserializeModule(const llvm::MemoryBuffer *input,
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MLIRContext *context) {
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Builder builder(context);
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// Make sure the input stream can be treated as a stream of SPIR-V words
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auto start = input->getBufferStart();
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auto size = input->getBufferSize();
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if (size % sizeof(uint32_t) != 0) {
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emitError(UnknownLoc::get(context))
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<< "SPIR-V binary module must contain integral number of 32-bit words";
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return {};
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}
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auto binary = llvm::makeArrayRef(reinterpret_cast<const uint32_t *>(start),
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size / sizeof(uint32_t));
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auto spirvModule = spirv::deserialize(binary, context);
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if (!spirvModule)
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return {};
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OwningModuleRef module(ModuleOp::create(FileLineColLoc::get(
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input->getBufferIdentifier(), /*line=*/0, /*column=*/0, context)));
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module->getBody()->push_front(spirvModule->getOperation());
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return module;
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}
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static TranslateToMLIRRegistration fromBinary(
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"deserialize-spirv", [](llvm::SourceMgr &sourceMgr, MLIRContext *context) {
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assert(sourceMgr.getNumBuffers() == 1 && "expected one buffer");
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return deserializeModule(
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sourceMgr.getMemoryBuffer(sourceMgr.getMainFileID()), context);
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});
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//===----------------------------------------------------------------------===//
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// Serialization registration
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//===----------------------------------------------------------------------===//
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static LogicalResult serializeModule(ModuleOp module, raw_ostream &output) {
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if (!module)
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return failure();
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SmallVector<uint32_t, 0> binary;
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SmallVector<spirv::ModuleOp, 1> spirvModules;
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module.walk([&](spirv::ModuleOp op) { spirvModules.push_back(op); });
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if (spirvModules.empty())
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return module.emitError("found no 'spv.module' op");
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if (spirvModules.size() != 1)
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return module.emitError("found more than one 'spv.module' op");
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if (failed(spirv::serialize(spirvModules[0], binary)))
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return failure();
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output.write(reinterpret_cast<char *>(binary.data()),
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binary.size() * sizeof(uint32_t));
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return mlir::success();
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}
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static TranslateFromMLIRRegistration
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toBinary("serialize-spirv", [](ModuleOp module, raw_ostream &output) {
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return serializeModule(module, output);
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});
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//===----------------------------------------------------------------------===//
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// Round-trip registration
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//===----------------------------------------------------------------------===//
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static LogicalResult roundTripModule(llvm::SourceMgr &sourceMgr,
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raw_ostream &output,
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MLIRContext *context) {
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// Parse an MLIR module from the source manager.
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auto srcModule = OwningModuleRef(parseSourceFile(sourceMgr, context));
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if (!srcModule)
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return failure();
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SmallVector<uint32_t, 0> binary;
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auto spirvModules = srcModule->getOps<spirv::ModuleOp>();
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if (spirvModules.begin() == spirvModules.end())
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return srcModule->emitError("found no 'spv.module' op");
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if (std::next(spirvModules.begin()) != spirvModules.end())
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return srcModule->emitError("found more than one 'spv.module' op");
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if (failed(spirv::serialize(*spirvModules.begin(), binary)))
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return failure();
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// Then deserialize to get back a SPIR-V module.
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auto spirvModule = spirv::deserialize(binary, context);
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if (!spirvModule)
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return failure();
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// Wrap around in a new MLIR module.
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OwningModuleRef dstModule(ModuleOp::create(FileLineColLoc::get(
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/*filename=*/"", /*line=*/0, /*column=*/0, context)));
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dstModule->getBody()->push_front(spirvModule->getOperation());
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dstModule->print(output);
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return mlir::success();
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}
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static TranslateRegistration roundtrip(
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"test-spirv-roundtrip",
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[](llvm::SourceMgr &sourceMgr, raw_ostream &output, MLIRContext *context) {
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return roundTripModule(sourceMgr, output, context);
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});
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