a2c4b7c8e2
This patch adds the `convertInstruction` and `getSupportedInstructions` to `LLVMImportInterface`, allowing any non-LLVM dialect to specify how to import LLVM IR instructions and overriding the default import of LLVM instructions.
112 lines
3.9 KiB
C++
112 lines
3.9 KiB
C++
//===- TestFromLLVMIRTranslation.cpp - Import Test dialect from LLVM IR ---===//
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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 between LLVM IR and the MLIR Test dialect.
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//
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//===----------------------------------------------------------------------===//
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#include "TestDialect.h"
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#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
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#include "mlir/IR/Builders.h"
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#include "mlir/IR/BuiltinAttributes.h"
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#include "mlir/IR/BuiltinOps.h"
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#include "mlir/Support/LLVM.h"
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#include "mlir/Target/LLVMIR/Dialect/LLVMIR/LLVMIRToLLVMTranslation.h"
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#include "mlir/Target/LLVMIR/Import.h"
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#include "mlir/Target/LLVMIR/ModuleImport.h"
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#include "mlir/Tools/mlir-translate/Translation.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Verifier.h"
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#include "llvm/IRReader/IRReader.h"
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#include "llvm/Support/SourceMgr.h"
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using namespace mlir;
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using namespace test;
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static ArrayRef<unsigned> getSupportedInstructionsImpl() {
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static unsigned instructions[] = {llvm::Instruction::Load};
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return instructions;
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}
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static LogicalResult convertLoad(OpBuilder &builder, llvm::Instruction *inst,
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ArrayRef<llvm::Value *> llvmOperands,
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LLVM::ModuleImport &moduleImport) {
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FailureOr<Value> addr = moduleImport.convertValue(llvmOperands[0]);
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if (failed(addr))
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return failure();
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// Create the LoadOp
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Value loadOp = builder.create<LLVM::LoadOp>(
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moduleImport.translateLoc(inst->getDebugLoc()),
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moduleImport.convertType(inst->getType()), *addr);
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moduleImport.mapValue(inst) = builder.create<SameOperandElementTypeOp>(
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loadOp.getLoc(), loadOp.getType(), loadOp, loadOp);
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return success();
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}
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namespace {
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class TestDialectLLVMImportDialectInterface
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: public LLVMImportDialectInterface {
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public:
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using LLVMImportDialectInterface::LLVMImportDialectInterface;
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LogicalResult
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convertInstruction(OpBuilder &builder, llvm::Instruction *inst,
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ArrayRef<llvm::Value *> llvmOperands,
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LLVM::ModuleImport &moduleImport) const override {
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switch (inst->getOpcode()) {
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case llvm::Instruction::Load:
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return convertLoad(builder, inst, llvmOperands, moduleImport);
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default:
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break;
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}
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return failure();
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}
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ArrayRef<unsigned> getSupportedInstructions() const override {
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return getSupportedInstructionsImpl();
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}
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};
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} // namespace
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namespace mlir {
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void registerTestFromLLVMIR() {
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TranslateToMLIRRegistration registration(
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"test-import-llvmir", "test dialect from LLVM IR",
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[](llvm::SourceMgr &sourceMgr,
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MLIRContext *context) -> OwningOpRef<Operation *> {
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llvm::SMDiagnostic err;
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llvm::LLVMContext llvmContext;
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std::unique_ptr<llvm::Module> llvmModule =
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llvm::parseIR(*sourceMgr.getMemoryBuffer(sourceMgr.getMainFileID()),
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err, llvmContext);
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if (!llvmModule) {
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std::string errStr;
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llvm::raw_string_ostream errStream(errStr);
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err.print(/*ProgName=*/"", errStream);
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emitError(UnknownLoc::get(context)) << errStream.str();
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return {};
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}
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if (llvm::verifyModule(*llvmModule, &llvm::errs()))
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return nullptr;
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return translateLLVMIRToModule(std::move(llvmModule), context, false);
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},
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[](DialectRegistry ®istry) {
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registry.insert<DLTIDialect>();
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registry.insert<test::TestDialect>();
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registerLLVMDialectImport(registry);
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registry.addExtension(
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+[](MLIRContext *ctx, test::TestDialect *dialect) {
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dialect->addInterfaces<TestDialectLLVMImportDialectInterface>();
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});
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});
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}
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} // namespace mlir
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