virtual bool runOnFunction(Function& f)
{
CurrentFile::set(__FILE__);
bool changed = false;
// Make sure this is a function that we can use
if (f.isDeclaration() /*|| !f.isDFFunction()*/ )
{
return changed ;
}
for(Function::iterator BB = f.begin(); BB != f.end(); ++BB)
{
begin:
for(BasicBlock::iterator II = BB->begin(); II != BB->end(); ++II)
{
if( !dynamic_cast<TerminatorInst*>(&*II) )
{
II->replaceAllUsesWith(UndefValue::get(II->getType()));
II->eraseFromParent();
goto begin;
}
}
}
changed = true;
return changed;
}
void MakeDispatcherPass::ConvertCmp(Function& function)
{
typedef std::vector< Instruction * > InstList;
InstList insts;
for (Function::iterator BB = function.begin(), bbE = function.end(); BB != bbE; ++BB)
{
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E;)
{
if (isa< CmpInst >(I))
{
insts.push_back(I);
}
if (isa< BranchInst >(I))
{
BasicBlock::iterator save = I;
BranchInst* branchInst = dynamic_cast< BranchInst *>(&*I);
if (branchInst->isConditional() && !insts.empty())
{
Value* valbranch = NULL;
valbranch = branchInst->getCondition();
ShowType(dynamic_cast<CmpInst*>(insts[0]));
CreateInt3(BB, I);
I++;
save->eraseFromParent();
insts.pop_back();
continue;
}
}
I++;
}
}
}
bool EraseUclibcFiniPass::runOnModule(Module &M) {
Function *f = M.getFunction("tern_exit");
Function *fini = M.getFunction("__uClibc_fini");
if(!f || !fini)
return false;
for (Function::iterator b = f->begin(), be = f->end(); b != be; ++b) {
for (BasicBlock::iterator i = b->begin(), ie = b->end(); i != ie; ++i) {
if (i->getOpcode() == Instruction::Call) {
CallInst *ci = dyn_cast<CallInst>(i);
assert(ci);
if (ci->getCalledFunction() == fini) {
i->eraseFromParent();
return true;
}
}
}
}
return false;
}
bool RemoveExtendsPass::runOnFunction(Function& f)
{
CurrentFile::set(__FILE__);
bool changed = false ;
//see if there are any ROCCCNames or ROCCCSizes that caused the extend
for(Function::iterator BB = f.begin(); BB != f.end(); ++BB)
{
begin:
for(BasicBlock::iterator II = BB->begin(); II != BB->end(); ++II)
{
if( dynamic_cast<FPExtInst*>(&*II) or
dynamic_cast<ZExtInst*>(&*II) or
dynamic_cast<SExtInst*>(&*II) or
dynamic_cast<BitCastInst*>(&*II) )
{
INTERNAL_MESSAGE("Attempting to remove uses of " << II->getName() << "\n");
for(Value::use_iterator UI = II->use_begin(); UI != II->use_end(); ++UI)
{
dynamic_cast<Instruction*>(*UI)->replaceUsesOfWith(II, II->getOperand(0));
goto begin;
}
if( II->use_begin() == II->use_end() )
{
II->eraseFromParent();
II = BB->begin();
}
else
{
INTERNAL_ERROR("Extend " << *II << " is still used in " << **II->use_begin() << "!");
assert(0 and "Extend operation still exists!");
}
}
}
}
return changed ;
}