76 lines · cpp
1//===- TestClone.cpp - Pass to test operation cloning --------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "TestOps.h"10#include "mlir/IR/BuiltinOps.h"11#include "mlir/Pass/Pass.h"12 13using namespace mlir;14 15namespace {16 17struct DumpNotifications : public OpBuilder::Listener {18 void notifyOperationInserted(Operation *op,19 OpBuilder::InsertPoint previous) override {20 llvm::outs() << "notifyOperationInserted: " << op->getName() << "\n";21 }22};23 24/// This is a test pass which clones the body of a function. Specifically25/// this pass replaces f(x) to instead return f(f(x)) in which the cloned body26/// takes the result of the first operation return as an input.27struct ClonePass28 : public PassWrapper<ClonePass, InterfacePass<FunctionOpInterface>> {29 MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(ClonePass)30 31 StringRef getArgument() const final { return "test-clone"; }32 StringRef getDescription() const final { return "Test clone of op"; }33 void runOnOperation() override {34 FunctionOpInterface op = getOperation();35 36 // Limit testing to ops with only one region.37 if (op->getNumRegions() != 1)38 return;39 40 Region ®ion = op->getRegion(0);41 if (!region.hasOneBlock())42 return;43 44 Block ®ionEntry = region.front();45 Operation *terminator = regionEntry.getTerminator();46 47 // Only handle functions whose returns match the inputs.48 if (terminator->getNumOperands() != regionEntry.getNumArguments())49 return;50 51 IRMapping map;52 for (auto tup :53 llvm::zip(terminator->getOperands(), regionEntry.getArguments())) {54 if (std::get<0>(tup).getType() != std::get<1>(tup).getType())55 return;56 map.map(std::get<1>(tup), std::get<0>(tup));57 }58 59 OpBuilder builder(op->getContext());60 DumpNotifications dumpNotifications;61 builder.setListener(&dumpNotifications);62 builder.setInsertionPointToEnd(®ionEntry);63 SmallVector<Operation *> toClone;64 for (Operation &inst : regionEntry)65 toClone.push_back(&inst);66 for (Operation *inst : toClone)67 builder.clone(*inst, map);68 terminator->erase();69 }70};71} // namespace72 73namespace mlir {74void registerCloneTestPasses() { PassRegistration<ClonePass>(); }75} // namespace mlir76