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Handle Bitcast Instruction #1

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Handle Bitcast Instruction #1

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29 changes: 26 additions & 3 deletions lib/InstModel/LFCPAInstModel/LFCPAInstModel.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -180,8 +180,9 @@ std::vector<Token *> LFCPAInstModel::extractToken(llvm::CmpInst *Inst) {
// llvm::errs()<<"\n VALUE= "<<*v;

I = llvm::dyn_cast<llvm::Instruction>(v);
q.push(I);

if(I != nullptr){
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@SHREYASINGH29 SHREYASINGH29 Jun 14, 2021

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Segmentation fault as I was sometimes a null pointer.

q.push(I);
}

while(!q.empty()) {
llvm::Instruction *I = q.front();
Expand All @@ -205,7 +206,9 @@ std::vector<Token *> LFCPAInstModel::extractToken(llvm::CmpInst *Inst) {
llvm::Value* v = U.get();
// llvm::errs()<<"\n VALUE= "<<*v;
llvm::Instruction *I1 = llvm::dyn_cast<llvm::Instruction>(v);
q.push(I1);
if(I != nullptr){
q.push(I1);
}
}
}
}//end if load
Expand Down Expand Up @@ -262,6 +265,14 @@ std::vector<Token *> LFCPAInstModel::extractToken(llvm::ReturnInst *Inst) {
Ins = I;
}//end else
}//end if load
else if(llvm::BitCastInst *BI = llvm::dyn_cast<llvm::BitCastInst>(I)){
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@SHREYASINGH29 SHREYASINGH29 Jun 14, 2021

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getting an infinite loop as bitcast was not supported in return.

Ins = I;
InstInfoMap[I] = II;
}
else {
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@SHREYASINGH29 SHREYASINGH29 Jun 14, 2021

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getting infinite loop as other instructions are not supported right now.

skipFlag = true;
break;
}
}//end for
}//end while
}//end if
Expand All @@ -285,6 +296,18 @@ std::vector<Token *> LFCPAInstModel::extractToken(llvm::BitCastInst *Inst) {
} else if (llvm::BitCastInst *BI =
llvm::dyn_cast<llvm::BitCastInst>(Inst->getOperand(0))) {
TokenVec.push_back(this->getTokenWrapper()->getToken(BI->getDestTy()));
} else if(llvm::LoadInst *LI = llvm::dyn_cast<llvm::LoadInst>(Inst->getOperand(0))) {
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@SHREYASINGH29 SHREYASINGH29 Jun 14, 2021

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Handling one or more load instruction before bitcast.

Token* TokLIOp = this->getTokenWrapper()->getToken(LI->getPointerOperand());
if(!TokLIOp->isGlobalVar()) {
if(llvm::LoadInst* LIOp = llvm::dyn_cast<llvm::LoadInst>(LI->getPointerOperand())) {
std::vector<Token*> LITokens = this->extractToken(LIOp);
if(LITokens.size()==2) {
TokenVec.push_back(LITokens[1]);
}
}
} else {
TokenVec.push_back(this->getTokenWrapper()->getToken(LI->getPointerOperand()));
}
}
if (TokenVec.size() == 1) {
TokenVec.push_back(this->getTokenWrapper()->getToken(Inst->getOperand(0)));
Expand Down