Don't crash on bogus llvm.noinline. This is first part of PR1817 (preventing reduction)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44281 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/InlineSimple.cpp b/lib/Transforms/IPO/InlineSimple.cpp
index 38bf061..ebd8a59 100644
--- a/lib/Transforms/IPO/InlineSimple.cpp
+++ b/lib/Transforms/IPO/InlineSimple.cpp
@@ -59,6 +59,10 @@
   if (GV == 0)
     return false;
 
+  // Don't crash on invalid code
+  if (!GV->hasInitializer())
+    return false;
+  
   const ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
   
   if (InitList == 0)