5a4ca51a91
When cloning an operation with a region, the builder was currently notifying about the insertion of the cloned operations inside the region before the cloned operation itself. When using cloning inside rewrite pass, this could cause issues if a pattern is expected to be applied on a cloned parent operation before trying to apply patterns on the cloned operations it contains (the patterns are attempted in order of notifications for the cloned operations).
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
//===- TestClone.cpp - Pass to test operation cloning --------------------===//
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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 "TestDialect.h"
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#include "mlir/IR/BuiltinOps.h"
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#include "mlir/Pass/Pass.h"
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using namespace mlir;
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namespace {
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struct DumpNotifications : public OpBuilder::Listener {
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void notifyOperationInserted(Operation *op) override {
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llvm::outs() << "notifyOperationInserted: " << op->getName() << "\n";
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}
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};
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/// This is a test pass which clones the body of a function. Specifically
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/// this pass replaces f(x) to instead return f(f(x)) in which the cloned body
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/// takes the result of the first operation return as an input.
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struct ClonePass
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: public PassWrapper<ClonePass, InterfacePass<FunctionOpInterface>> {
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MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(ClonePass)
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StringRef getArgument() const final { return "test-clone"; }
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StringRef getDescription() const final { return "Test clone of op"; }
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void runOnOperation() override {
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FunctionOpInterface op = getOperation();
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// Limit testing to ops with only one region.
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if (op->getNumRegions() != 1)
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return;
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Region ®ion = op->getRegion(0);
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if (!region.hasOneBlock())
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return;
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Block ®ionEntry = region.front();
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Operation *terminator = regionEntry.getTerminator();
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// Only handle functions whose returns match the inputs.
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if (terminator->getNumOperands() != regionEntry.getNumArguments())
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return;
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IRMapping map;
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for (auto tup :
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llvm::zip(terminator->getOperands(), regionEntry.getArguments())) {
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if (std::get<0>(tup).getType() != std::get<1>(tup).getType())
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return;
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map.map(std::get<1>(tup), std::get<0>(tup));
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}
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OpBuilder builder(op->getContext());
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DumpNotifications dumpNotifications;
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builder.setListener(&dumpNotifications);
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builder.setInsertionPointToEnd(®ionEntry);
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SmallVector<Operation *> toClone;
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for (Operation &inst : regionEntry)
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toClone.push_back(&inst);
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for (Operation *inst : toClone)
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builder.clone(*inst, map);
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terminator->erase();
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}
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};
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} // namespace
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namespace mlir {
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void registerCloneTestPasses() { PassRegistration<ClonePass>(); }
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} // namespace mlir
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