diff --git a/lib/Sema/SemaStmt.cpp b/lib/Sema/SemaStmt.cpp
index c093a9a..9240dad 100644
--- a/lib/Sema/SemaStmt.cpp
+++ b/lib/Sema/SemaStmt.cpp
@@ -2792,7 +2792,8 @@
                               std::vector<std::string> &AsmStrings) {
   assert (!AsmToks.empty() && "Didn't expect an empty AsmToks!");
 
-  // Assume simple asm stmt until we parse a non-register identifer.
+  // Assume simple asm stmt until we parse a non-register identifer (or we just
+  // need to bail gracefully).
   IsSimple = true;
 
   SmallString<512> Asm;