beyond the end of an alloca to make FastDSE faster and more aggressive.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39945
91177308-0d34-0410-b5e6-
96231b3b80d8
// See through pointer-to-pointer bitcasts
while (isa<BitCastInst>(v) || isa<GetElementPtrInst>(v))
- if (BitCastInst* C = dyn_cast<BitCastInst>(v)) {
- if (isa<PointerType>(C->getSrcTy()))
- v = C->getOperand(0);
- else
- break;
- } else if (GetElementPtrInst* G = dyn_cast<GetElementPtrInst>(v)) {
- if (G->hasAllZeroIndices())
- v = G->getOperand(0);
- else
- break;
- }
+ if (BitCastInst* C = dyn_cast<BitCastInst>(v))
+ v = C->getOperand(0);
+ else if (GetElementPtrInst* G = dyn_cast<GetElementPtrInst>(v))
+ v = G->getOperand(0);
}
// getAnalysisUsage - We require post dominance frontiers (aka Control