You cannot call removeModule on a JIT with no modules.  Patch by Verena
Beckham <verena@codeplay.com>.  Reviewed by Jim Grosbach.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160753 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JIT/JIT.cpp b/lib/ExecutionEngine/JIT/JIT.cpp
index a942299..a54ee3b 100644
--- a/lib/ExecutionEngine/JIT/JIT.cpp
+++ b/lib/ExecutionEngine/JIT/JIT.cpp
@@ -361,7 +361,7 @@
 
   MutexGuard locked(lock);
 
-  if (jitstate->getModule() == M) {
+  if (jitstate && jitstate->getModule() == M) {
     delete jitstate;
     jitstate = 0;
   }