[llvm] [DebugInfo][LoopIdiomRecognize] Fix #82582: Wrong debug location update in processLoopStoreOfLoopLoad (PR #82608)

[Shan Huang via llvm-commits]

================
@@ -1418,7 +1418,8 @@ bool LoopIdiomRecognize::processLoopStoreOfLoopLoad(
         StoreBasePtr, *StoreAlign, LoadBasePtr, *LoadAlign, NumBytes, StoreSize,
         AATags.TBAA, AATags.TBAAStruct, AATags.Scope, AATags.NoAlias);
   }
-  NewCall->setDebugLoc(TheStore->getDebugLoc());
+  
+  NewCall->dropLocation();
----------------
Apochens wrote:

Thanks, I put a comment here to explain why we need to drop the debug location instead of preserving the debug location of `TheStore`.

https://github.com/llvm/llvm-project/pull/82608