9519e3ecbf
Extend the `amendOperation` mechanism for translating dialect attributes attached to operations from another dialect when translating MLIR to LLVM IR. Previously, this mechanism would have no knowledge of the LLVM IR instructions created for the given operation, making it impossible for it to perform local modifications such as attaching operation-level metadata. Collect instructions inserted by the LLVM IR builder and pass them to `amendOperation`.
139 lines
5.2 KiB
C++
139 lines
5.2 KiB
C++
//===- TestToLLVMIRTranslation.cpp - Translate Test dialect to 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 the MLIR Test dialect and LLVM IR.
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//
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//===----------------------------------------------------------------------===//
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#include "TestDialect.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/Target/LLVMIR/Dialect/Builtin/BuiltinToLLVMIRTranslation.h"
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#include "mlir/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.h"
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#include "mlir/Target/LLVMIR/LLVMTranslationInterface.h"
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#include "mlir/Target/LLVMIR/ModuleTranslation.h"
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#include "mlir/Tools/mlir-translate/Translation.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/ADT/TypeSwitch.h"
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using namespace mlir;
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namespace {
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class TestDialectLLVMIRTranslationInterface
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: public LLVMTranslationDialectInterface {
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public:
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using LLVMTranslationDialectInterface::LLVMTranslationDialectInterface;
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LogicalResult
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amendOperation(Operation *op, ArrayRef<llvm::Instruction *> instructions,
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NamedAttribute attribute,
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LLVM::ModuleTranslation &moduleTranslation) const final;
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LogicalResult
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convertOperation(Operation *op, llvm::IRBuilderBase &builder,
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LLVM::ModuleTranslation &moduleTranslation) const final;
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};
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} // namespace
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LogicalResult TestDialectLLVMIRTranslationInterface::amendOperation(
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Operation *op, ArrayRef<llvm::Instruction *> instructions,
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NamedAttribute attribute,
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LLVM::ModuleTranslation &moduleTranslation) const {
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return llvm::StringSwitch<llvm::function_ref<LogicalResult(Attribute)>>(
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attribute.getName())
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// The `test.discardable_mod_attr` attribute, if present and set to
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// `true`, results in the addition of a `test.symbol` in the module it is
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// attached to with name "sym_from_attr".
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.Case("test.discardable_mod_attr",
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[&](Attribute attr) {
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if (!isa<ModuleOp>(op)) {
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op->emitOpError("attribute 'test.discardable_mod_attr' only "
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"supported in modules");
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return failure();
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}
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bool createSymbol = false;
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if (auto boolAttr = attr.dyn_cast<BoolAttr>())
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createSymbol = boolAttr.getValue();
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if (createSymbol) {
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OpBuilder builder(op->getRegion(0));
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builder.create<test::SymbolOp>(
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op->getLoc(),
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StringAttr::get(op->getContext(), "sym_from_attr"),
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/*sym_visibility=*/nullptr);
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}
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return success();
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})
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.Case("test.add_annotation",
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[&](Attribute attr) {
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for (llvm::Instruction *instruction : instructions) {
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if (auto strAttr = dyn_cast<StringAttr>(attr)) {
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instruction->addAnnotationMetadata("annotation_from_test: " +
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strAttr.getValue().str());
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} else {
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instruction->addAnnotationMetadata("annotation_from_test");
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}
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}
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return success();
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})
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.Default([](Attribute) {
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// Skip other discardable dialect attributes.
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return success();
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})(attribute.getValue());
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}
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LogicalResult TestDialectLLVMIRTranslationInterface::convertOperation(
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Operation *op, llvm::IRBuilderBase &builder,
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LLVM::ModuleTranslation &moduleTranslation) const {
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return llvm::TypeSwitch<Operation *, LogicalResult>(op)
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// `test.symbol`s are translated into global integers in LLVM IR, with a
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// name equal to the symbol they are translated from.
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.Case([&](test::SymbolOp symOp) {
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llvm::Module *mod = moduleTranslation.getLLVMModule();
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llvm::IntegerType *i32Type =
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llvm::IntegerType::get(moduleTranslation.getLLVMContext(), 32);
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mod->getOrInsertGlobal(symOp.getSymName(), i32Type);
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return success();
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})
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.Default([&](Operation *) {
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return op->emitOpError("unsupported translation of test operation");
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});
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}
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namespace mlir {
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void registerTestToLLVMIR() {
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TranslateFromMLIRRegistration registration(
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"test-to-llvmir", "test dialect to LLVM IR",
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[](Operation *op, raw_ostream &output) {
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llvm::LLVMContext llvmContext;
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auto llvmModule = translateModuleToLLVMIR(op, llvmContext);
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if (!llvmModule)
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return failure();
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llvmModule->print(output, nullptr);
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return success();
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},
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[](DialectRegistry ®istry) {
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registry.insert<test::TestDialect>();
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registerBuiltinDialectTranslation(registry);
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registerLLVMDialectTranslation(registry);
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registry.addExtension(
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+[](MLIRContext *ctx, test::TestDialect *dialect) {
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dialect->addInterfaces<TestDialectLLVMIRTranslationInterface>();
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});
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});
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}
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} // namespace mlir
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