Driver: Mark function as nounwind when -mkernel or -fapple-kext is present.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113541 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 24d05c1..2ad98ea 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1184,7 +1184,8 @@
     CmdArgs.push_back("-fno-access-control");
 
   // -fexceptions=0 is default.
-  if (needsExceptions(Args, InputType, getToolChain().getTriple()))
+  if (!KernelOrKext &&
+      needsExceptions(Args, InputType, getToolChain().getTriple()))
     CmdArgs.push_back("-fexceptions");
 
   if (getToolChain().UseSjLjExceptions())