[llvm] [X86, SimplifyCFG] Support hoisting load/store with conditional faulting (Part II) (PR #108812)

[Simon Pilgrim via llvm-commits]

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@@ -1615,19 +1615,39 @@ static bool areIdenticalUpToCommutativity(const Instruction *I1,
   return false;
 }
 
+static bool isSafeCheapLoadStore(const Instruction *I,
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RKSimon wrote:

Move this as an NFC to simplify the patch

https://github.com/llvm/llvm-project/pull/108812