[llvm] [LLVM][MemCpyOpt] Unify alias tags if we optimize allocas (PR #129537)

[Nikita Popov via llvm-commits]

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@@ -1569,6 +1569,10 @@ bool MemCpyOptPass::performStackMoveOptzn(Instruction *Load, Instruction *Store,
               continue;
             }
           }
+          if (UI->hasMetadata(LLVMContext::MD_tbaa))
+            NoAliasInstrs.insert(UI);
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nikic wrote:

Now that this no longer holds only `!noalias`, rename to `AAMetadataInstrs` or something?

https://github.com/llvm/llvm-project/pull/129537