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//===- InstructionNamer.cpp - Give anonymous instructions names -----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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/Transforms/Scalar.h"
#include "llvm/Function.h"
#include "llvm/Pass.h"
#include "llvm/Type.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 {
Info.setPreservesAll();
}
bool runOnFunction(Function &F) {
for (Function::arg_iterator AI = F.arg_begin(), AE = F.arg_end();
AI != AE; ++AI)
if (!AI->hasName() && !AI->getType()->isVoidTy())
AI->setName("arg");
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
if (!BB->hasName())
BB->setName("bb");
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
if (!I->hasName() && !I->getType()->isVoidTy())
I->setName("tmp");
}
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();
}
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