LAA: add missed swap when inverting src, sink (NFC)

We miss swapping the types of the source and sink when the source and
sink are inverted, leaving a footgun behind. Fix this.

llvm/lib/Analysis/LoopAccessAnalysis.cpp

@@ -1921,6 +1921,7 @@ MemoryDepChecker::getDependenceDistanceStrideAndSize(
   if (StrideAPtr && *StrideAPtr < 0) {
     std::swap(Src, Sink);
     std::swap(AInst, BInst);
+    std::swap(ATy, BTy);
     std::swap(StrideAPtr, StrideBPtr);
   }