[llvm] [BOLT] Extend Inliner to work on functions with Pointer Autentication (PR #162458)

[Peter Waller via llvm-commits]

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@@ -313,6 +313,19 @@ class AArch64MCPlusBuilder : public MCPlusBuilder {
            Inst.getOpcode() == AArch64::RETABSPPCr;
   }
 
+  void createMatchingAuth(const MCInst &AuthAndRet, MCInst &Auth) override {
+    switch (AuthAndRet.getOpcode()) {
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peterwaller-arm wrote:

I see you commented on the removal in the commit message. I'd suggest keeping the clear even if it is currently a nop, since looking at other instruction helpers they do use it, and at some point in the future it may become needed. Also if anyone gets unlucky and has a use case which involves reusing an existing buffer, it may contain some other ops which still need clearing.

https://github.com/llvm/llvm-project/pull/162458