1 //===- InstructionNamer.cpp - Give anonymous instructions names -----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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
15 //===----------------------------------------------------------------------===//
17 #include "llvm/Transforms/Scalar.h"
18 #include "llvm/Function.h"
19 #include "llvm/Pass.h"
20 #include "llvm/Type.h"
24 struct InstNamer : public FunctionPass {
25 static char ID; // Pass identification, replacement for typeid
26 InstNamer() : FunctionPass(ID) {}
28 void getAnalysisUsage(AnalysisUsage &Info) const {
29 Info.setPreservesAll();
32 bool runOnFunction(Function &F) {
33 for (Function::arg_iterator AI = F.arg_begin(), AE = F.arg_end();
35 if (!AI->hasName() && !AI->getType()->isVoidTy())
38 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
42 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
43 if (!I->hasName() && !I->getType()->isVoidTy())
50 char InstNamer::ID = 0;
51 static RegisterPass<InstNamer> X("instnamer",
52 "Assign names to anonymous instructions");
56 char &llvm::InstructionNamerID = InstNamer::ID;
57 //===----------------------------------------------------------------------===//
59 // InstructionNamer - Give any unnamed non-void instructions "tmp" names.
61 FunctionPass *llvm::createInstructionNamerPass() {
62 return new InstNamer();