//===- InstructionNamer.cpp - Give anonymous instructions names -----------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This is a little utility pass that gives instructions names, this is mostly // useful when diffing the effect of an optimization because deleting an // unnamed instruction can change all other instruction numbering, making the // diff very noisy. // //===----------------------------------------------------------------------===// #include "llvm/IR/Function.h" #include "llvm/IR/Type.h" #include "llvm/InitializePasses.h" #include "llvm/Pass.h" #include "llvm/Transforms/Utils.h" using namespace llvm; namespace { struct InstNamer : public FunctionPass { static char ID; // Pass identification, replacement for typeid InstNamer() : FunctionPass(ID) { initializeInstNamerPass(*PassRegistry::getPassRegistry()); } void getAnalysisUsage(AnalysisUsage &Info) const override { Info.setPreservesAll(); } bool runOnFunction(Function &F) override { for (auto &Arg : F.args()) if (!Arg.hasName()) Arg.setName("arg"); for (BasicBlock &BB : F) { if (!BB.hasName()) BB.setName("bb"); for (Instruction &I : BB) if (!I.hasName() && !I.getType()->isVoidTy()) I.setName("i"); } return true; } }; char InstNamer::ID = 0; } INITIALIZE_PASS(InstNamer, "instnamer", "Assign names to anonymous instructions", false, false) char &llvm::InstructionNamerID = InstNamer::ID; //===----------------------------------------------------------------------===// // // InstructionNamer - Give any unnamed non-void instructions "tmp" names. // FunctionPass *llvm::createInstructionNamerPass() { return new InstNamer(); } |