[llvm] [LoopIdiomVectorize] Preserve address space in FindFirstByte (PR #185226)

[Ricardo Jesus via llvm-commits]

================
@@ -1206,7 +1206,7 @@ Value *LoopIdiomVectorize::expandFindFirstByte(
     Value *SearchStart, Value *SearchEnd, Value *NeedleStart,
     Value *NeedleEnd) {
   // Set up some types and constants that we intend to reuse.
-  auto *PtrTy = Builder.getPtrTy();
+  auto *PtrTy = SearchStart->getType();
----------------
rj-jesus wrote:

Since there's only one use of `PtrTy`, perhaps it's safer to remove it and use the Search pointer type inline?
```
PHINode *MatchLCSSA = Builder.CreatePHI(SearchStart->getType(), ...
``` 

https://github.com/llvm/llvm-project/pull/185226