Fix recently introduced control path warnings with Clang

hughbe · hughbe · commit d17b6daef6d2 · 2017-01-27T11:52:26.000Z
&gt; warning: control may reach end of non-void function [-Wreturn-type]
diff --git a/lib/AST/TypeRefinementContext.cpp b/lib/AST/TypeRefinementContext.cpp
@@ -285,6 +285,8 @@ TypeRefinementContext::getAvailabilityConditionVersionSourceRange(
   case Reason::Root:
     return SourceRange();
   }
+
+  llvm_unreachable("Unhandled Reason in switch.");
 }
 
 void TypeRefinementContext::print(raw_ostream &OS, SourceManager &SrcMgr,

Original file line number	Diff line number	Diff line change
`@@ -285,6 +285,8 @@ TypeRefinementContext::getAvailabilityConditionVersionSourceRange(`
`285`	`285`	`case Reason::Root:`
`286`	`286`	`return SourceRange();`
`287`	`287`	`}`
	`288`	`+`
	`289`	`+ llvm_unreachable("Unhandled Reason in switch.");`
`288`	`290`	`}`
`289`	`291`
`290`	`292`	`void TypeRefinementContext::print(raw_ostream &OS, SourceManager &SrcMgr,`