79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
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//===- InstructionNamer.cpp - Give anonymous instructions names -----------===//
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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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//
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// This is a little utility pass that gives instructions names, this is mostly
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// useful when diffing the effect of an optimization because deleting an
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// unnamed instruction can change all other instruction numbering, making the
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// diff very noisy.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Utils/InstructionNamer.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/IR/Type.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/Pass.h"
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#include "llvm/Transforms/Utils.h"
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using namespace llvm;
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namespace {
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void nameInstructions(Function &F) {
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for (auto &Arg : F.args()) {
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if (!Arg.hasName())
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Arg.setName("arg");
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}
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for (BasicBlock &BB : F) {
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if (!BB.hasName())
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BB.setName("bb");
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for (Instruction &I : BB) {
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if (!I.hasName() && !I.getType()->isVoidTy())
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I.setName("i");
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}
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}
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}
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struct InstNamer : public FunctionPass {
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static char ID; // Pass identification, replacement for typeid
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InstNamer() : FunctionPass(ID) {
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initializeInstNamerPass(*PassRegistry::getPassRegistry());
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}
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void getAnalysisUsage(AnalysisUsage &Info) const override {
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Info.setPreservesAll();
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}
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bool runOnFunction(Function &F) override {
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nameInstructions(F);
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return true;
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}
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};
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char InstNamer::ID = 0;
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} // namespace
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INITIALIZE_PASS(InstNamer, "instnamer",
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"Assign names to anonymous instructions", false, false)
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char &llvm::InstructionNamerID = InstNamer::ID;
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//===----------------------------------------------------------------------===//
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//
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// InstructionNamer - Give any unnamed non-void instructions "tmp" names.
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//
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FunctionPass *llvm::createInstructionNamerPass() {
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return new InstNamer();
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}
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PreservedAnalyses InstructionNamerPass::run(Function &F,
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FunctionAnalysisManager &FAM) {
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nameInstructions(F);
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return PreservedAnalyses::all();
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}
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