81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
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//===- PatternBenefit.cpp - RewritePattern benefit unit tests -------------===//
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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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#include "mlir/IR/OwningOpRef.h"
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#include "mlir/IR/PatternMatch.h"
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#include "mlir/Rewrite/PatternApplicator.h"
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#include "gtest/gtest.h"
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using namespace mlir;
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namespace {
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TEST(PatternBenefitTest, BenefitOrder) {
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// There was a bug which caused low-benefit op-specific patterns to never be
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// called in presence of high-benefit op-agnostic pattern
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MLIRContext context;
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OpBuilder builder(&context);
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OwningOpRef<ModuleOp> module = ModuleOp::create(builder.getUnknownLoc());
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struct Pattern1 : public OpRewritePattern<ModuleOp> {
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Pattern1(mlir::MLIRContext *context, bool *called)
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: OpRewritePattern<ModuleOp>(context, /*benefit*/ 1), called(called) {}
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mlir::LogicalResult
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matchAndRewrite(ModuleOp /*op*/,
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mlir::PatternRewriter & /*rewriter*/) const override {
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*called = true;
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return failure();
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}
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private:
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bool *called;
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};
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struct Pattern2 : public RewritePattern {
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Pattern2(MLIRContext *context, bool *called)
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: RewritePattern(MatchAnyOpTypeTag(), /*benefit=*/2, context),
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called(called) {}
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mlir::LogicalResult
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matchAndRewrite(Operation * /*op*/,
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mlir::PatternRewriter & /*rewriter*/) const override {
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*called = true;
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return failure();
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}
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private:
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bool *called;
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};
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RewritePatternSet patterns(&context);
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bool called1 = false;
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bool called2 = false;
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patterns.add<Pattern1>(&context, &called1);
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patterns.add<Pattern2>(&context, &called2);
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FrozenRewritePatternSet frozenPatterns(std::move(patterns));
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PatternApplicator pa(frozenPatterns);
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pa.applyDefaultCostModel();
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class MyPatternRewriter : public PatternRewriter {
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public:
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MyPatternRewriter(MLIRContext *ctx) : PatternRewriter(ctx) {}
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};
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MyPatternRewriter rewriter(&context);
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(void)pa.matchAndRewrite(*module, rewriter);
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EXPECT_TRUE(called1);
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EXPECT_TRUE(called2);
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}
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} // namespace
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