[llvm] [CodeGen][ARM64EC] Mangle EH personality handler names (PR #121652)

[Eli Friedman via llvm-commits]

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@@ -807,6 +807,17 @@ bool AArch64Arm64ECCallLowering::runOnModule(Module &Mod) {
   SetVector<GlobalAlias *> PatchableFns;
 
   for (Function &F : Mod) {
+    if (F.hasPersonalityFn()) {
+      GlobalValue *PersFn =
+          dyn_cast<GlobalValue>(F.getPersonalityFn()->stripPointerCasts());
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efriedma-quic wrote:

`cast<>`, unless you meant to null-check PersFn.

https://github.com/llvm/llvm-project/pull/121652