llvm-6502/lib/Transforms/Utils/InstructionNamer.cpp
Chris Lattner 3793325cb3 Add a new trivial -inst-namer pass which makes it possible to diff the
before/after effects of a pass, crazy!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55230 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-23 06:07:02 +00:00

50 lines
1.6 KiB
C++

//===- 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) {}
bool runOnFunction(Function &F) {
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
if (!I->hasName() && I->getType() != Type::VoidTy)
I->setName("tmp");
return true;
}
};
char InstNamer::ID = 0;
static RegisterPass<InstNamer> X("instnamer",
"Assign names to anonymous instructions");
}
//===----------------------------------------------------------------------===//
//
// InstructionNamer - Give any unnamed non-void instructions "tmp" names.
//
FunctionPass *llvm::createInstructionNamerPass() {
return new InstNamer();
}