67 lines
2.1 KiB
C++
67 lines
2.1 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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/// 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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BlockAndValueMapping 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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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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