/// FindAliasInfo - Extracts the relevant alias information from the memory
/// node. Returns true if the operand was a load.
bool DAGCombiner::FindAliasInfo(SDNode *N,
- SDValue &Ptr, int64_t &Size,
- const Value *&SrcValue,
- int &SrcValueOffset,
- unsigned &SrcValueAlign,
- const MDNode *&TBAAInfo) const {
- if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
- Ptr = LD->getBasePtr();
- Size = LD->getMemoryVT().getSizeInBits() >> 3;
- SrcValue = LD->getSrcValue();
- SrcValueOffset = LD->getSrcValueOffset();
- SrcValueAlign = LD->getOriginalAlignment();
- TBAAInfo = LD->getTBAAInfo();
- return true;
- }
- if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
- Ptr = ST->getBasePtr();
- Size = ST->getMemoryVT().getSizeInBits() >> 3;
- SrcValue = ST->getSrcValue();
- SrcValueOffset = ST->getSrcValueOffset();
- SrcValueAlign = ST->getOriginalAlignment();
- TBAAInfo = ST->getTBAAInfo();
- return false;
- }
- llvm_unreachable("FindAliasInfo expected a memory operand");
+ SDValue &Ptr, int64_t &Size,
+ const Value *&SrcValue,
+ int &SrcValueOffset,
+ unsigned &SrcValueAlign,
+ const MDNode *&TBAAInfo) const {
+ LSBaseSDNode *LS = cast<LSBaseSDNode>(N);
+
+ Ptr = LS->getBasePtr();
+ Size = LS->getMemoryVT().getSizeInBits() >> 3;
+ SrcValue = LS->getSrcValue();
+ SrcValueOffset = LS->getSrcValueOffset();
+ SrcValueAlign = LS->getOriginalAlignment();
+ TBAAInfo = LS->getTBAAInfo();
+ return isa<LoadSDNode>(LS);
}
/// GatherAllAliases - Walk up chain skipping non-aliasing memory nodes,