From cab3c6c6c48ed0da0f047bdc1a337d991c78ad8c Mon Sep 17 00:00:00 2001
From: Yang Fan <nullptr.cpp@gmail.com>
Date: Wed, 5 May 2021 14:44:48 +0800
Subject: [PATCH] [clang][TargetCXXABI] Fix -Wreturn-type warning (NFC)
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GCC warning:
```
In file included from /llvm-project/clang/include/clang/Basic/LangOptions.h:22,
                 from /llvm-project/clang/include/clang/Frontend/CompilerInvocation.h:16,
                 from /llvm-project/clang/lib/Frontend/CompilerInvocation.cpp:9:
/llvm-project/clang/include/clang/Basic/TargetCXXABI.h: In static member function ‘static bool clang::TargetCXXABI::isSupportedCXXABI(const llvm::Triple&, clang::TargetCXXABI::Kind)’:
/llvm-project/clang/include/clang/Basic/TargetCXXABI.h:114:3: warning: control reaches end of non-void function [-Wreturn-type]
  114 |   };
      |   ^
```
---
 clang/include/clang/Basic/TargetCXXABI.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clang/include/clang/Basic/TargetCXXABI.h b/clang/include/clang/Basic/TargetCXXABI.h
index 739ade31451e..91189996a4d9 100644
--- a/clang/include/clang/Basic/TargetCXXABI.h
+++ b/clang/include/clang/Basic/TargetCXXABI.h
@@ -111,6 +111,7 @@ public:
     case Microsoft:
       return T.isKnownWindowsMSVCEnvironment();
     }
+    llvm_unreachable("invalid CXXABI kind");
   };
 
   /// Does this ABI generally fall into the Itanium family of ABIs?