/// own block.
///
void MemoryDependenceAnalysis::
-getNonLocalPointerDependency(const AliasAnalysis::Location &Loc, bool isLoad,
- BasicBlock *FromBB,
+getNonLocalPointerDependency(Instruction *QueryInst,
SmallVectorImpl<NonLocalDepResult> &Result) {
+
+ auto getLocation = [](AliasAnalysis *AA, Instruction *Inst) {
+ if (auto *I = dyn_cast<LoadInst>(Inst))
+ return AA->getLocation(I);
+ else if (auto *I = dyn_cast<StoreInst>(Inst))
+ return AA->getLocation(I);
+ else if (auto *I = dyn_cast<VAArgInst>(Inst))
+ return AA->getLocation(I);
+ else if (auto *I = dyn_cast<AtomicCmpXchgInst>(Inst))
+ return AA->getLocation(I);
+ else if (auto *I = dyn_cast<AtomicRMWInst>(Inst))
+ return AA->getLocation(I);
+ else
+ llvm_unreachable("unsupported memory instruction");
+ };
+
+ const AliasAnalysis::Location Loc = getLocation(AA, QueryInst);
+ bool isLoad = isa<LoadInst>(QueryInst);
+ BasicBlock *FromBB = QueryInst->getParent();
+ assert(FromBB);
+
+ // This routine does not expect to deal with volatile instructions. Doing so
+ // would require piping through the QueryInst all the way through.
+ // TODO: volatiles can't be elided, but they can be reordered with other
+ // non-volatile accesses.
+ if (LoadInst *LI = dyn_cast<LoadInst>(QueryInst)) {
+ assert(!LI->isVolatile());
+ } else if (StoreInst *SI = dyn_cast<StoreInst>(QueryInst)) {
+ assert(!SI->isVolatile());
+ }
+
+
+ // We currently give up on any instruction which is ordered, but we do handle
+ // atomic instructions which are unordered.
+ // TODO: Handle ordered instructions
+ auto isOrdered = [](Instruction *Inst) {
+ if (LoadInst *LI = dyn_cast<LoadInst>(Inst)) {
+ return !LI->isUnordered();
+ } else if (StoreInst *SI = dyn_cast<StoreInst>(Inst)) {
+ return !SI->isUnordered();
+ }
+ return false;
+ };
+ assert(!isOrdered(QueryInst) && "ordered instructions not expected");
+
assert(Loc.Ptr->getType()->isPointerTy() &&
"Can't get pointer deps of a non-pointer!");
Result.clear();