42 lines
1.7 KiB
C++
42 lines
1.7 KiB
C++
//===- SwapExtractSliceWithFillPatterns.cpp -------------------------------===//
|
|
//
|
|
// 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/Dialect/Linalg/Transforms/Transforms.h"
|
|
#include "mlir/IR/PatternMatch.h"
|
|
|
|
using namespace mlir;
|
|
using namespace mlir::linalg;
|
|
|
|
/// Swaps tensor.extract_slice(linalg.fill(%cst, %init)) into linalg.fill(%cst,
|
|
/// tensor.extract_slice(%init)) when the linalg.fill op have no other users.
|
|
/// This helps to reduce the fill footprint.
|
|
struct SwapExtractSliceOfFill final
|
|
: public OpRewritePattern<tensor::ExtractSliceOp> {
|
|
using OpRewritePattern::OpRewritePattern;
|
|
|
|
LogicalResult matchAndRewrite(tensor::ExtractSliceOp extractOp,
|
|
PatternRewriter &rewriter) const override {
|
|
auto fillOp = extractOp.getSource().getDefiningOp<FillOp>();
|
|
if (!fillOp || !fillOp->hasOneUse())
|
|
return failure();
|
|
|
|
auto newExtractOp = rewriter.create<tensor::ExtractSliceOp>(
|
|
extractOp.getLoc(), extractOp.getType(), fillOp.getOutputs()[0],
|
|
extractOp.getMixedOffsets(), extractOp.getMixedSizes(),
|
|
extractOp.getMixedStrides());
|
|
rewriter.replaceOpWithNewOp<FillOp>(extractOp, fillOp.getInputs(),
|
|
ValueRange{newExtractOp.getResult()});
|
|
return success();
|
|
}
|
|
};
|
|
|
|
void mlir::linalg::populateSwapExtractSliceWithFillPatterns(
|
|
RewritePatternSet &patterns) {
|
|
patterns.add<SwapExtractSliceOfFill>(patterns.getContext());
|
|
}
|