45 lines · cpp
1//===- InstructionNamer.cpp - Give anonymous instructions names -----------===//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// This is a little utility pass that gives instructions names, this is mostly10// useful when diffing the effect of an optimization because deleting an11// unnamed instruction can change all other instruction numbering, making the12// diff very noisy.13//14//===----------------------------------------------------------------------===//15 16#include "llvm/Transforms/Utils/InstructionNamer.h"17#include "llvm/IR/Function.h"18#include "llvm/IR/PassManager.h"19#include "llvm/IR/Type.h"20 21using namespace llvm;22 23static void nameInstructions(Function &F) {24 for (Argument &Arg : F.args()) {25 if (!Arg.hasName())26 Arg.setName("arg");27 }28 29 for (BasicBlock &BB : F) {30 if (!BB.hasName())31 BB.setName("bb");32 33 for (Instruction &I : BB) {34 if (!I.hasName() && !I.getType()->isVoidTy())35 I.setName("i");36 }37 }38}39 40PreservedAnalyses InstructionNamerPass::run(Function &F,41 FunctionAnalysisManager &FAM) {42 nameInstructions(F);43 return PreservedAnalyses::all();44}45