[llvm] [PtrAuth] Add ConstantPtrAuth comparator to FunctionComparator.cpp (PR #159480)

[Oskar Wirga via llvm-commits]

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@@ -0,0 +1,101 @@
+; RUN: opt -passes=mergefunc -S %s | FileCheck %s
+; Ensure MergeFunc handles ConstantPtrAuth correctly and does not
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oskarwirga wrote:

Good suggestion, wasn't hard to add :) 

https://github.com/llvm/llvm-project/pull/159480