[llvm] [NFC][MC] Use `llvm_unreachable` for unreachable case (PR #152930)

[Abhishek Kaushik via llvm-commits]

https://github.com/abhishek-kaushik22 created https://github.com/llvm/llvm-project/pull/152930

None

>From b5a1ec628785ec4c1750af7e918cc6dd16d740ac Mon Sep 17 00:00:00 2001
From: Abhishek Kaushik <abhishek.kaushik at intel.com>
Date: Sun, 10 Aug 2025 22:38:17 +0530
Subject: [PATCH] [NFC][MC] Use `llvm_unreachable` for unreachable case

---
 llvm/lib/MC/MCAsmInfoGOFF.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/MC/MCAsmInfoGOFF.cpp b/llvm/lib/MC/MCAsmInfoGOFF.cpp
index 0a5d1927b1a22..d0f931d03d532 100644
--- a/llvm/lib/MC/MCAsmInfoGOFF.cpp
+++ b/llvm/lib/MC/MCAsmInfoGOFF.cpp
@@ -72,7 +72,7 @@ static void emitCATTR(raw_ostream &OS, StringRef Name, GOFF::ESDRmode Rmode,
       OS << "64";
       break;
     case GOFF::ESD_RMODE_None:
-      break;
+      llvm_unreachable("GOFF::ESD_RMODE_None should not be handled here");
     }
     OS << ')';
   }