1//===- InstructionNamer.cpp - Give anonymous instructions names -----------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This is a little utility pass that gives instructions names, this is mostly 11// useful when diffing the effect of an optimization because deleting an 12// unnamed instruction can change all other instruction numbering, making the 13// diff very noisy. 14// 15//===----------------------------------------------------------------------===// 16 17#include "llvm/Transforms/Scalar.h" 18#include "llvm/IR/Function.h" 19#include "llvm/IR/Type.h" 20#include "llvm/Pass.h" 21using namespace llvm; 22 23namespace { 24 struct InstNamer : public FunctionPass { 25 static char ID; // Pass identification, replacement for typeid 26 InstNamer() : FunctionPass(ID) { 27 initializeInstNamerPass(*PassRegistry::getPassRegistry()); 28 } 29 30 void getAnalysisUsage(AnalysisUsage &Info) const override { 31 Info.setPreservesAll(); 32 } 33 34 bool runOnFunction(Function &F) override { 35 for (Function::arg_iterator AI = F.arg_begin(), AE = F.arg_end(); 36 AI != AE; ++AI) 37 if (!AI->hasName() && !AI->getType()->isVoidTy()) 38 AI->setName("arg"); 39 40 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) { 41 if (!BB->hasName()) 42 BB->setName("bb"); 43 44 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 45 if (!I->hasName() && !I->getType()->isVoidTy()) 46 I->setName("tmp"); 47 } 48 return true; 49 } 50 }; 51 52 char InstNamer::ID = 0; 53} 54 55INITIALIZE_PASS(InstNamer, "instnamer", 56 "Assign names to anonymous instructions", false, false) 57char &llvm::InstructionNamerID = InstNamer::ID; 58//===----------------------------------------------------------------------===// 59// 60// InstructionNamer - Give any unnamed non-void instructions "tmp" names. 61// 62FunctionPass *llvm::createInstructionNamerPass() { 63 return new InstNamer(); 64} 65