[llvm] [Attributor] Prevent infinite loop in AAGlobalValueInfoFloating (PR #94941)

[Vidush Singhal via llvm-commits]

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@@ -1749,6 +1749,10 @@ bool Attributor::checkForAllCallees(
   return Pred(Callees.getArrayRef());
 }
 
+bool noRevisitUser(const User *user) {
+  return isa<PHINode>(user) || !isa<Instruction>(user);
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vidsinghal wrote:

Why do you pass UU.getuser() here instead of just UU? 

https://github.com/llvm/llvm-project/pull/94941