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//===- RemoveInstrumentationPass.cpp - Removes instrumentation ------------===//
//
// Copyright 2019 The MLIR Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// =============================================================================
//
// This file defines a pass to remove any instrumentation ops. It is often one
// of the final steps when performing quantization and is run after any
// decisions requiring instrumentation have been made.
//
//===----------------------------------------------------------------------===//
#include "mlir/Dialect/QuantOps/QuantOps.h"
#include "mlir/IR/MLIRContext.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Quantizer/Transforms/Passes.h"
using namespace mlir;
using namespace mlir::quantizer;
using namespace mlir::quant;
namespace {
class RemoveInstrumentationPass
: public FunctionPass<RemoveInstrumentationPass> {
void runOnFunction() override;
};
template <typename OpTy>
class RemoveIdentityOpRewrite : public RewritePattern {
public:
RemoveIdentityOpRewrite(MLIRContext *context)
: RewritePattern(OpTy::getOperationName(), 1, context) {}
PatternMatchResult matchAndRewrite(Operation *op,
PatternRewriter &rewriter) const override {
assert(op->getNumOperands() == 1);
assert(op->getNumResults() == 1);
rewriter.replaceOp(op, op->getOperand(0));
return matchSuccess();
}
};
} // end anonymous namespace
void RemoveInstrumentationPass::runOnFunction() {
OwningRewritePatternList patterns;
auto func = getFunction();
auto *context = &getContext();
patterns.insert<RemoveIdentityOpRewrite<StatisticsOp>,
RemoveIdentityOpRewrite<StatisticsRefOp>,
RemoveIdentityOpRewrite<CoupledRefOp>>(context);
applyPatternsGreedily(func, patterns);
}
std::unique_ptr<FunctionPassBase>
mlir::quantizer::createRemoveInstrumentationPass() {
return std::make_unique<RemoveInstrumentationPass>();
}
static PassRegistration<RemoveInstrumentationPass>
pass("quantizer-remove-instrumentation",
"Removes instrumentation and hints which have no effect on final "
"execution");
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