From 5f4535b974e973d52797945fbf80f19ffba8c4ad Mon Sep 17 00:00:00 2001
From: Reid Kleckner <reid@kleckner.net>
Date: Tue, 16 Jul 2013 14:04:08 +0000
Subject: [Support] Fix some warnings when self-hosting clang on Windows

llvm-svn: 186413
---
 llvm/lib/Support/ErrorHandling.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'llvm/lib/Support/ErrorHandling.cpp')

diff --git a/llvm/lib/Support/ErrorHandling.cpp b/llvm/lib/Support/ErrorHandling.cpp
index f4b591e..9425445 100644
--- a/llvm/lib/Support/ErrorHandling.cpp
+++ b/llvm/lib/Support/ErrorHandling.cpp
@@ -96,4 +96,9 @@ void llvm::llvm_unreachable_internal(const char *msg, const char *file,
     dbgs() << " at " << file << ":" << line;
   dbgs() << "!\n";
   abort();
+#ifdef LLVM_BUILTIN_UNREACHABLE
+  // Windows systems and possibly others don't declare abort() to be noreturn,
+  // so use the unreachable builtin to avoid a Clang self-host warning.
+  LLVM_BUILTIN_UNREACHABLE;
+#endif
 }
-- 
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