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106 changes: 106 additions & 0 deletions
106
compiler/src/iree/compiler/Dialect/Flow/Transforms/SetEncodingHintOnDispatches.cpp
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| Original file line number | Diff line number | Diff line change |
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| // Copyright 2024 The IREE Authors | ||
| // | ||
| // Licensed 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 | ||
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| #include <queue> | ||
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| #include "iree/compiler/Codegen/Dialect/Codegen/IR/IREECodegenAttrs.h" | ||
| #include "iree/compiler/Dialect/Flow/Transforms/PassDetail.h" | ||
| #include "iree/compiler/Dialect/Flow/Transforms/Passes.h" | ||
| #include "iree/compiler/Dialect/LinalgExt/IR/LinalgExtOps.h" | ||
| #include "llvm/Support/Debug.h" | ||
| #include "mlir/Dialect/Affine/IR/AffineOps.h" | ||
| #include "mlir/Dialect/Arith/IR/Arith.h" | ||
| #include "mlir/Interfaces/FunctionInterfaces.h" | ||
| #include "mlir/Pass/Pass.h" | ||
| #include "mlir/Pass/PassManager.h" | ||
| #include "mlir/Transforms/DialectConversion.h" | ||
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| namespace mlir::iree_compiler::IREE::Flow { | ||
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| namespace { | ||
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| struct SetEncodingHintOnDispatchesPass | ||
| : public SetEncodingHintOnDispatchesBase<SetEncodingHintOnDispatchesPass> { | ||
| void runOnOperation() override; | ||
| }; | ||
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| } // namespace | ||
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| static LogicalResult lowerUpperBoundTileSizeOpToConstantsAndAttachEncodingHints( | ||
| RewriterBase &rewriter, | ||
| LinalgExt::UpperBoundTileSizeOp upperBoundTileSizeOp) { | ||
| OpBuilder::InsertionGuard g(rewriter); | ||
| rewriter.setInsertionPointAfter(upperBoundTileSizeOp); | ||
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| AffineExpr s0, s1; | ||
| bindSymbols(rewriter.getContext(), s0, s1); | ||
| AffineMap roundMap = AffineMap::get(0, 2, s1.ceilDiv(s0) * s0); | ||
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| SmallVector<affine::AffineApplyOp> applyOps; | ||
| SmallVector<DispatchWorkgroupsOp> dispatches; | ||
| std::queue<Operation *> que; | ||
| que.push(upperBoundTileSizeOp); | ||
| while (!que.empty()) { | ||
| auto op = que.front(); | ||
| que.pop(); | ||
| for (Operation *user : op->getUsers()) { | ||
| if (auto applyOp = dyn_cast<affine::AffineApplyOp>(user)) { | ||
| if (applyOp.getMap() != roundMap) { | ||
| return failure(); | ||
| } | ||
| applyOps.push_back(applyOp); | ||
| que.push(applyOp); | ||
| } else if (auto dispatch = dyn_cast<DispatchWorkgroupsOp>(user)) { | ||
| dispatches.push_back(dispatch); | ||
| } else { | ||
| return failure(); | ||
| } | ||
| } | ||
| } | ||
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| constexpr int64_t kAlignment = 16; | ||
| Location loc = upperBoundTileSizeOp.getLoc(); | ||
| Value cst = rewriter.createOrFold<arith::ConstantIndexOp>(loc, kAlignment); | ||
| for (auto value : upperBoundTileSizeOp.getResults()) { | ||
| rewriter.replaceAllUsesWith(value, cst); | ||
| } | ||
| for (auto applyOp : applyOps) { | ||
| rewriter.replaceAllUsesWith(applyOp.getResult(), | ||
| applyOp.getMapOperands().back()); | ||
| } | ||
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| auto encodingAttr = Codegen::EncodingRoundDimsToAttr::get( | ||
| rewriter.getContext(), kAlignment); | ||
| for (auto dispatch : dispatches) { | ||
| dispatch->setAttr(Codegen::EncodingRoundDimsToAttr::getMnemonic(), | ||
| encodingAttr); | ||
| } | ||
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| return success(); | ||
| } | ||
| void SetEncodingHintOnDispatchesPass::runOnOperation() { | ||
| MLIRContext *ctx = &getContext(); | ||
| Operation *funcOp = getOperation(); | ||
| IRRewriter rewriter(ctx); | ||
| auto res = | ||
| funcOp->walk([&](LinalgExt::UpperBoundTileSizeOp op) -> WalkResult { | ||
| if (failed(lowerUpperBoundTileSizeOpToConstantsAndAttachEncodingHints( | ||
| rewriter, op))) { | ||
| return WalkResult::interrupt(); | ||
| } | ||
| return WalkResult::advance(); | ||
| }); | ||
| if (res.wasInterrupted()) { | ||
| return signalPassFailure(); | ||
| } | ||
| } | ||
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| std::unique_ptr<InterfacePass<mlir::FunctionOpInterface>> | ||
| createSetEncodingHintOnDispatchesPass() { | ||
| return std::make_unique<SetEncodingHintOnDispatchesPass>(); | ||
| } | ||
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| } // namespace mlir::iree_compiler::IREE::Flow |
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