diff --git a/clang/lib/CodeGen/CodeGenAction.cpp b/clang/lib/CodeGen/CodeGenAction.cpp
--- a/clang/lib/CodeGen/CodeGenAction.cpp
+++ b/clang/lib/CodeGen/CodeGenAction.cpp
@@ -899,6 +899,9 @@
   // Report the backend message using the usual diagnostic mechanism.
   FullSourceLoc Loc;
   Diags.Report(Loc, DiagID).AddString(MsgStorage);
+
+  if (Severity == DS_Error)
+    exit(1);
 }
 #undef ComputeDiagID