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//===- PatternBenefit.cpp - RewritePattern benefit unit tests -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "mlir/IR/OwningOpRef.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/Rewrite/PatternApplicator.h"
#include "gtest/gtest.h"
using namespace mlir;
namespace {
TEST(PatternBenefitTest, BenefitOrder) {
// There was a bug which caused low-benefit op-specific patterns to never be
// called in presence of high-benefit op-agnostic pattern
MLIRContext context;
OpBuilder builder(&context);
OwningOpRef<ModuleOp> module = ModuleOp::create(builder.getUnknownLoc());
struct Pattern1 : public OpRewritePattern<ModuleOp> {
Pattern1(mlir::MLIRContext *context, bool *called)
: OpRewritePattern<ModuleOp>(context, /*benefit*/ 1), called(called) {}
mlir::LogicalResult
matchAndRewrite(ModuleOp /*op*/,
mlir::PatternRewriter & /*rewriter*/) const override {
*called = true;
return failure();
}
private:
bool *called;
};
struct Pattern2 : public RewritePattern {
Pattern2(MLIRContext *context, bool *called)
: RewritePattern(MatchAnyOpTypeTag(), /*benefit=*/2, context),
called(called) {}
mlir::LogicalResult
matchAndRewrite(Operation * /*op*/,
mlir::PatternRewriter & /*rewriter*/) const override {
*called = true;
return failure();
}
private:
bool *called;
};
RewritePatternSet patterns(&context);
bool called1 = false;
bool called2 = false;
patterns.add<Pattern1>(&context, &called1);
patterns.add<Pattern2>(&context, &called2);
FrozenRewritePatternSet frozenPatterns(std::move(patterns));
PatternApplicator pa(frozenPatterns);
pa.applyDefaultCostModel();
class MyPatternRewriter : public PatternRewriter {
public:
MyPatternRewriter(MLIRContext *ctx) : PatternRewriter(ctx) {}
};
MyPatternRewriter rewriter(&context);
(void)pa.matchAndRewrite(*module, rewriter);
EXPECT_TRUE(called1);
EXPECT_TRUE(called2);
}
} // namespace
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