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

[Adrian Prantl via llvm-commits]

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@@ -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();
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adrian-prantl wrote:

Would be good to document why dropping the location is the right thing to do here.

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