[llvm] [DSE] Fixes bug caused by skipped read clobbers (PR #83181)

[Alina Sbirlea via llvm-commits]

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@@ -1274,7 +1274,8 @@ struct DSEState {
       if (CB->onlyAccessesInaccessibleMemory())
         return false;
 
-    return isRefSet(BatchAA.getModRefInfo(UseInst, DefLoc));
+    AAQueryInfo TmpAAQI(AA, &EI);
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alinas wrote:

This shouldn't be necessary. `AA.getModRefInfo(UseInst, DefLoc)` should work.

https://github.com/llvm/llvm-project/pull/83181