72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
//===- AffineExpandIndexOps.cpp - Affine expand index ops 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 expand affine index ops into one or more more
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// fundamental operations.
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/Affine/Passes.h"
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#include "mlir/Dialect/Affine/IR/AffineOps.h"
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#include "mlir/Dialect/Affine/Transforms/Transforms.h"
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#include "mlir/Dialect/Affine/Utils.h"
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#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
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namespace mlir {
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namespace affine {
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#define GEN_PASS_DEF_AFFINEEXPANDINDEXOPS
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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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using namespace mlir;
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using namespace mlir::affine;
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namespace {
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/// Lowers `affine.delinearize_index` into a sequence of division and remainder
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/// operations.
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struct LowerDelinearizeIndexOps
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: public OpRewritePattern<AffineDelinearizeIndexOp> {
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using OpRewritePattern<AffineDelinearizeIndexOp>::OpRewritePattern;
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LogicalResult matchAndRewrite(AffineDelinearizeIndexOp op,
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PatternRewriter &rewriter) const override {
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FailureOr<SmallVector<Value>> multiIndex =
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delinearizeIndex(rewriter, op->getLoc(), op.getLinearIndex(),
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llvm::to_vector(op.getBasis()));
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if (failed(multiIndex))
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return failure();
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rewriter.replaceOp(op, *multiIndex);
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return success();
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}
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};
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class ExpandAffineIndexOpsPass
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: public affine::impl::AffineExpandIndexOpsBase<ExpandAffineIndexOpsPass> {
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public:
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ExpandAffineIndexOpsPass() = default;
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void runOnOperation() override {
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MLIRContext *context = &getContext();
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RewritePatternSet patterns(context);
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populateAffineExpandIndexOpsPatterns(patterns);
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if (failed(
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applyPatternsAndFoldGreedily(getOperation(), std::move(patterns))))
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return signalPassFailure();
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}
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};
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} // namespace
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void mlir::affine::populateAffineExpandIndexOpsPatterns(
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RewritePatternSet &patterns) {
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patterns.insert<LowerDelinearizeIndexOps>(patterns.getContext());
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}
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std::unique_ptr<Pass> mlir::affine::createAffineExpandIndexOpsPass() {
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return std::make_unique<ExpandAffineIndexOpsPass>();
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}
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