bool LLPE::searchForStoreInstruction(BasicBlock *BB, vector<int> argv) {
bool GEPIFlag = false;
//Iterate through each instruction in the basic block
//Search for GEPI. The next store after a GEPI, indicates the location for inserting a new alloca instruction.
for(BasicBlock::iterator BI = BB->begin(), BI_end = BB->end(); BI != BI_end; ++BI) {
if ( isa<GetElementPtrInst>(BI) ) {
GEPIFlag = true;
}
if (GEPIFlag) {
if ( StoreInst *SI = dyn_cast<StoreInst>(BI)) {
AllocaInst *constAlloca = dyn_cast<AllocaInst>(SI->getOperand(1));
constAlloca->print(errs());
StoreInst *constSI = new StoreInst(ConstantInt::get(Type::getInt32Ty(SI->getContext()), argv.at(0)), constAlloca, SI);
SI->eraseFromParent();
return true;
}
}
} //End BasicBlock loop
return false;
}
