Fix a goof with my previous commit by completely returning when we

detect an in-eligible block rather than just breaking out of the loop.

llvm-svn: 156166

llvm/lib/Transforms/Utils/CodeExtractor.cpp

@@ -78,7 +78,7 @@ buildExtractionBlockSet(ArrayRef<BasicBlock *> BBs) {
 
     if (!isBlockValidForExtraction(**I)) {
       Result.clear();
-      break;
+      return Result;
     }
   }