| 1 | //===- XeGPUFoldAliasOps.cpp - XeGPU alias ops folders ----------*- C++ -*-===// |
|---|
| 2 | // |
|---|
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
|---|
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
|---|
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
|---|
| 6 | // |
|---|
| 7 | //===----------------------------------------------------------------------===// |
|---|
| 8 | |
|---|
| 9 | #include "mlir/Dialect/XeGPU/Transforms/Passes.h" |
|---|
| 10 | |
|---|
| 11 | #include "mlir/Dialect/Affine/ViewLikeInterfaceUtils.h" |
|---|
| 12 | #include "mlir/Dialect/MemRef/IR/MemRef.h" |
|---|
| 13 | #include "mlir/Dialect/XeGPU/IR/XeGPU.h" |
|---|
| 14 | #include "mlir/Dialect/XeGPU/Transforms/Transforms.h" |
|---|
| 15 | #include "mlir/Pass/Pass.h" |
|---|
| 16 | #include "mlir/Transforms/GreedyPatternRewriteDriver.h" |
|---|
| 17 | #include "llvm/Support/Debug.h" |
|---|
| 18 | |
|---|
| 19 | namespace mlir { |
|---|
| 20 | namespace xegpu { |
|---|
| 21 | #define GEN_PASS_DEF_XEGPUFOLDALIASOPS |
|---|
| 22 | #include "mlir/Dialect/XeGPU/Transforms/Passes.h.inc" |
|---|
| 23 | } // namespace xegpu |
|---|
| 24 | } // namespace mlir |
|---|
| 25 | |
|---|
| 26 | #define DEBUG_TYPE "xegpu-fold-alias-ops" |
|---|
| 27 | #define DBGS() (llvm::dbgs() << "[" DEBUG_TYPE "]: ") |
|---|
| 28 | |
|---|
| 29 | using namespace mlir; |
|---|
| 30 | |
|---|
| 31 | namespace { |
|---|
| 32 | /// Merges subview operation with xegpu.create_nd_tdesc operation. |
|---|
| 33 | class XegpuCreateNdDescOpSubViewOpFolder final |
|---|
| 34 | : public OpRewritePattern<xegpu::CreateNdDescOp> { |
|---|
| 35 | public: |
|---|
| 36 | using OpRewritePattern<xegpu::CreateNdDescOp>::OpRewritePattern; |
|---|
| 37 | |
|---|
| 38 | LogicalResult matchAndRewrite(xegpu::CreateNdDescOp descOp, |
|---|
| 39 | PatternRewriter &rewriter) const override; |
|---|
| 40 | }; |
|---|
| 41 | } // namespace |
|---|
| 42 | |
|---|
| 43 | LogicalResult XegpuCreateNdDescOpSubViewOpFolder::matchAndRewrite( |
|---|
| 44 | xegpu::CreateNdDescOp descOp, PatternRewriter &rewriter) const { |
|---|
| 45 | auto subViewOp = descOp.getSource().getDefiningOp<memref::SubViewOp>(); |
|---|
| 46 | |
|---|
| 47 | if (!subViewOp) |
|---|
| 48 | return rewriter.notifyMatchFailure(descOp, "not a subview producer" ); |
|---|
| 49 | if (!subViewOp.hasUnitStride()) |
|---|
| 50 | return rewriter.notifyMatchFailure(descOp, "requires unit strides" ); |
|---|
| 51 | |
|---|
| 52 | SmallVector<Value> resolvedOffsets; |
|---|
| 53 | affine::resolveIndicesIntoOpWithOffsetsAndStrides( |
|---|
| 54 | rewriter, descOp.getLoc(), subViewOp.getMixedOffsets(), |
|---|
| 55 | subViewOp.getMixedStrides(), subViewOp.getDroppedDims(), |
|---|
| 56 | descOp.getMixedOffsets(), resolvedOffsets); |
|---|
| 57 | |
|---|
| 58 | rewriter.replaceOpWithNewOp<xegpu::CreateNdDescOp>( |
|---|
| 59 | descOp, descOp.getTensorDesc().getType(), subViewOp.getSource(), |
|---|
| 60 | getAsOpFoldResult(resolvedOffsets)); |
|---|
| 61 | |
|---|
| 62 | return success(); |
|---|
| 63 | } |
|---|
| 64 | |
|---|
| 65 | void xegpu::populateXeGPUFoldAliasOpsPatterns(RewritePatternSet &patterns) { |
|---|
| 66 | patterns.add<XegpuCreateNdDescOpSubViewOpFolder>(arg: patterns.getContext()); |
|---|
| 67 | } |
|---|
| 68 | |
|---|
| 69 | namespace { |
|---|
| 70 | |
|---|
| 71 | struct XeGPUFoldAliasOpsPass final |
|---|
| 72 | : public xegpu::impl::XeGPUFoldAliasOpsBase<XeGPUFoldAliasOpsPass> { |
|---|
| 73 | void runOnOperation() override; |
|---|
| 74 | }; |
|---|
| 75 | |
|---|
| 76 | } // namespace |
|---|
| 77 | |
|---|
| 78 | void XeGPUFoldAliasOpsPass::runOnOperation() { |
|---|
| 79 | RewritePatternSet patterns(&getContext()); |
|---|
| 80 | xegpu::populateXeGPUFoldAliasOpsPatterns(patterns); |
|---|
| 81 | (void)applyPatternsAndFoldGreedily(getOperation(), std::move(patterns)); |
|---|
| 82 | } |
|---|
| 83 | |
|---|
