From 73e8d435885066e7dc1f9d543e567b556cd0fc69 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Tue, 29 Sep 2009 18:39:56 +0000
Subject: [PATCH] Create empty StringRef is incoming cstring is NULL.

llvm-svn: 83082
---
 llvm/include/llvm/ADT/StringRef.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/include/llvm/ADT/StringRef.h b/llvm/include/llvm/ADT/StringRef.h
index e4fd258cb871..30379a38f46f 100644
--- a/llvm/include/llvm/ADT/StringRef.h
+++ b/llvm/include/llvm/ADT/StringRef.h
@@ -46,7 +46,7 @@ namespace llvm {
 
     /// Construct a string ref from a cstring.
     /*implicit*/ StringRef(const char *Str) 
-      : Data(Str), Length(::strlen(Str)) {}
+      : Data(Str) { if (Str) Length = ::strlen(Str); else Length = 0; }
  
     /// Construct a string ref from a pointer and length.
     /*implicit*/ StringRef(const char *_Data, unsigned _Length)