4dd5f79f07
This enables partial bufferization that includes function signatures. To test this, this change also makes the func-bufferize partial and adds a dedicated finalizing-bufferize pass. Differential Revision: https://reviews.llvm.org/D92032
87 lines
3.5 KiB
C++
87 lines
3.5 KiB
C++
//===- Bufferize.cpp - Bufferization for std ops --------------------------===//
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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 bufferization of std.func's and std.call's.
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//
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//===----------------------------------------------------------------------===//
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#include "PassDetail.h"
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#include "mlir/Dialect/StandardOps/IR/Ops.h"
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#include "mlir/Dialect/StandardOps/Transforms/FuncConversions.h"
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#include "mlir/Dialect/StandardOps/Transforms/Passes.h"
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#include "mlir/Transforms/Bufferize.h"
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#include "mlir/Transforms/DialectConversion.h"
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using namespace mlir;
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namespace {
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struct FuncBufferizePass : public FuncBufferizeBase<FuncBufferizePass> {
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using FuncBufferizeBase<FuncBufferizePass>::FuncBufferizeBase;
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void runOnOperation() override {
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auto module = 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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populateFuncOpTypeConversionPattern(patterns, context, typeConverter);
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target.addDynamicallyLegalOp<FuncOp>([&](FuncOp op) {
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return typeConverter.isSignatureLegal(op.getType()) &&
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typeConverter.isLegal(&op.getBody());
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});
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populateCallOpTypeConversionPattern(patterns, context, typeConverter);
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target.addDynamicallyLegalOp<CallOp>(
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[&](CallOp op) { return typeConverter.isLegal(op); });
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populateBranchOpInterfaceAndReturnOpTypeConversionPattern(patterns, context,
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typeConverter);
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target.addLegalOp<ModuleOp, ModuleTerminatorOp, TensorLoadOp,
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TensorToMemrefOp>();
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target.addDynamicallyLegalOp<ReturnOp>(
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[&](ReturnOp op) { return typeConverter.isLegal(op); });
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// Mark terminators as legal if they have the ReturnLike trait or
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// implement the BranchOpInterface and have valid types. If they do not
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// implement the trait or interface, mark them as illegal no matter what.
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target.markUnknownOpDynamicallyLegal([&](Operation *op) {
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// If it is not a terminator, ignore it.
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if (op->isKnownNonTerminator())
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return true;
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// If it is not the last operation in the block, also ignore it. We do
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// this to handle unknown operations, as well.
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Block *block = op->getBlock();
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if (!block || &block->back() != op)
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return true;
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// ReturnLike operations have to be legalized with their parent. For
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// return this is handled, for other ops they remain as is.
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if (op->hasTrait<OpTrait::ReturnLike>())
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return true;
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// All successor operands of branch like operations must be rewritten.
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if (auto branchOp = dyn_cast<BranchOpInterface>(op)) {
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for (int p = 0, e = op->getBlock()->getNumSuccessors(); p < e; ++p) {
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auto successorOperands = branchOp.getSuccessorOperands(p);
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if (successorOperands.hasValue() &&
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!typeConverter.isLegal(successorOperands.getValue().getTypes()))
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return false;
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}
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return true;
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}
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return false;
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});
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if (failed(applyFullConversion(module, target, std::move(patterns))))
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signalPassFailure();
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}
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};
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} // namespace
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std::unique_ptr<Pass> mlir::createFuncBufferizePass() {
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return std::make_unique<FuncBufferizePass>();
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}
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