[clang] [AArch64] Fix possible miscompilation with `__builtin_arm_gmi` (PR #196481)

[Eli Friedman via cfe-commits]

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@@ -94,7 +94,7 @@ bool SemaARM::BuiltinARMMemoryTaggingCall(unsigned BuiltinID,
     if (!SecArgType->isIntegerType())
       return Diag(TheCall->getBeginLoc(), diag::err_memtag_arg_must_be_integer)
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efriedma-quic wrote:

Why are we accepting arbitrary-width integers here?

https://github.com/llvm/llvm-project/pull/196481