gistfile1.cpp

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 52ba489..4d8864e 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1321,15 +1321,18 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   // The make clang go fast button.
   CmdArgs.push_back("-disable-free");
 
+  const char *InputFilename = darwin::CC1::getBaseInputName(Args, Inputs);
   // Disable the verification pass in -asserts builds.
 #ifdef NDEBUG
-  CmdArgs.push_back("-disable-llvm-verifier");
+  StringRef IFN(InputFilename);
+  if(!IFN.endswith(".ll"))
+    CmdArgs.push_back("-disable-llvm-verifier");
 #endif
 
   // Set the main file name, so that debug info works even with
   // -save-temps.
   CmdArgs.push_back("-main-file-name");
-  CmdArgs.push_back(darwin::CC1::getBaseInputName(Args, Inputs));
+  CmdArgs.push_back(InputFilename);
 
   // Some flags which affect the language (via preprocessor
   // defines). See darwin::CC1::AddCPPArgs.