Don't create a StringRef with a NULL value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103455 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/SubtargetFeature.cpp b/lib/Target/SubtargetFeature.cpp
index 035e64a017b197456e40e4cc5bbd7306892093da..113cd5b7b3ef07ece404fd6084fcf261de4ec492 100644 (file)
--- a/lib/Target/SubtargetFeature.cpp
+++ b/lib/Target/SubtargetFeature.cpp
@@ -389,6 +389,8 @@ void SubtargetFeatures::getDefaultSubtargetFeatures(const std::string &CPU,
     break;
   }
 
+  if (!Attrs) return;
+
   StringRef SR(Attrs);
 
   while (!SR.empty()) {