Fix MSVC "'llvm::AArch64PACKeyIDToString': not all control paths return a value" warning. NFC.

RKSimon · RKSimon · commit 14c87ab7635a · 2023-08-24T17:55:33.000+01:00
diff --git a/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h b/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h
@@ -830,6 +830,7 @@ inline static StringRef AArch64PACKeyIDToString(AArch64PACKey::ID KeyID) {
   case AArch64PACKey::DB:
     return StringRef("db");
   }
+  llvm_unreachable("Unhandled AArch64PACKey::ID enum");
 }
 
 /// Return numeric key ID for 2-letter identifier string.

Original file line number	Diff line number	Diff line change
`@@ -830,6 +830,7 @@ inline static StringRef AArch64PACKeyIDToString(AArch64PACKey::ID KeyID) {`
`830`	`830`	`case AArch64PACKey::DB:`
`831`	`831`	`return StringRef("db");`
`832`	`832`	`}`
	`833`	`+ llvm_unreachable("Unhandled AArch64PACKey::ID enum");`
`833`	`834`	`}`
`834`	`835`
`835`	`836`	`/// Return numeric key ID for 2-letter identifier string.`