1ce7040359
This fixes a subtle issue, described in the comment starting with "Clone the op without the regions and inline the regions from the old op", which prevented this conversion from working on non-trivial examples. Differential Revision: https://reviews.llvm.org/D90203
57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
//===- Bufferize.cpp - scf bufferize 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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#include "mlir/Transforms/Bufferize.h"
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#include "PassDetail.h"
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#include "mlir/Dialect/SCF/Passes.h"
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#include "mlir/Dialect/SCF/SCF.h"
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#include "mlir/Dialect/SCF/Transforms.h"
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#include "mlir/Dialect/StandardOps/IR/Ops.h"
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#include "mlir/Transforms/DialectConversion.h"
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using namespace mlir;
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using namespace mlir::scf;
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namespace {
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struct SCFBufferizePass : public SCFBufferizeBase<SCFBufferizePass> {
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void runOnFunction() override {
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auto func = getOperation();
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auto *context = &getContext();
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BufferizeTypeConverter typeConverter;
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OwningRewritePatternList patterns;
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ConversionTarget target(*context);
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// TODO: Move this to BufferizeTypeConverter's constructor.
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//
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// This doesn't currently play well with "finalizing" bufferizations (ones
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// that expect all materializations to be gone). In particular, there seems
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// to at least be a double-free in the dialect conversion framework
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// when this materialization gets inserted and then folded away because
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// it is marked as illegal.
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typeConverter.addArgumentMaterialization(
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[](OpBuilder &builder, RankedTensorType type, ValueRange inputs,
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Location loc) -> Value {
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assert(inputs.size() == 1);
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assert(inputs[0].getType().isa<BaseMemRefType>());
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return builder.create<TensorLoadOp>(loc, type, inputs[0]);
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});
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populateBufferizeMaterializationLegality(target);
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populateSCFStructuralTypeConversionsAndLegality(context, typeConverter,
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patterns, target);
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if (failed(applyPartialConversion(func, target, std::move(patterns))))
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return signalPassFailure();
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};
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};
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} // end anonymous namespace
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std::unique_ptr<Pass> mlir::createSCFBufferizePass() {
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return std::make_unique<SCFBufferizePass>();
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}
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