5d51db75e4
This fixes a TODO to use alias analysis to determine whether a read op intervenes between two write operations to the same memref. Signed-off-by: Asra <asraa@google.com>
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
//===- AffineScalarReplacement.cpp - Affine scalar replacement pass -------===//
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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 pass to forward affine memref stores to loads, thereby
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// potentially getting rid of intermediate memrefs entirely. It also removes
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// redundant loads.
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/Affine/Passes.h"
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#include "mlir/Analysis/AliasAnalysis.h"
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#include "mlir/Dialect/Affine/Utils.h"
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#include "mlir/Dialect/Func/IR/FuncOps.h"
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#include "mlir/IR/Dominance.h"
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#include "mlir/Support/LogicalResult.h"
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#include <algorithm>
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namespace mlir {
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namespace affine {
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#define GEN_PASS_DEF_AFFINESCALARREPLACEMENT
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#include "mlir/Dialect/Affine/Passes.h.inc"
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} // namespace affine
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} // namespace mlir
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#define DEBUG_TYPE "affine-scalrep"
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using namespace mlir;
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using namespace mlir::affine;
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namespace {
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struct AffineScalarReplacement
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: public affine::impl::AffineScalarReplacementBase<
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AffineScalarReplacement> {
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void runOnOperation() override;
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};
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} // namespace
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std::unique_ptr<OperationPass<func::FuncOp>>
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mlir::affine::createAffineScalarReplacementPass() {
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return std::make_unique<AffineScalarReplacement>();
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}
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void AffineScalarReplacement::runOnOperation() {
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affineScalarReplace(getOperation(), getAnalysis<DominanceInfo>(),
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getAnalysis<PostDominanceInfo>(),
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getAnalysis<AliasAnalysis>());
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}
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