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

[Peter Waller via llvm-commits]

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@@ -266,6 +266,35 @@ class AArch64MCPlusBuilder : public MCPlusBuilder {
            Inst.getOpcode() == AArch64::RETABSPPCr;
   }
 
+  void createMatchingAuth(const MCInst &AuthAndRet, MCInst &Auth) override {
+    assert(isPAuthAndRet(AuthAndRet) &&
+           "Not a fused pauth-and-return instruction");
+
+    Auth.clear();
+    switch (AuthAndRet.getOpcode()) {
+    case AArch64::RETAA:
+      Auth.setOpcode(AArch64::AUTIASP);
+      break;
+    case AArch64::RETAB:
+      Auth.setOpcode(AArch64::AUTIBSP);
+      break;
+    case AArch64::RETAASPPCi:
+      Auth.setOpcode(AArch64::AUTIASPPCi);
+      break;
+    case AArch64::RETABSPPCi:
+      Auth.setOpcode(AArch64::AUTIBSPPCi);
+      break;
+    case AArch64::RETAASPPCr:
+      Auth.setOpcode(AArch64::AUTIASPPCr);
+      break;
+    case AArch64::RETABSPPCr:
+      Auth.setOpcode(AArch64::AUTIBSPPCr);
+      break;
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peterwaller-arm wrote:

Leaving them unsupported and out of scope for this PR seems reasonable to me.

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