Factor out EH landing pad code into a separate function, and constify
a bunch of stuff to support it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101273 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 9362d37..6e6d2f5 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -2410,7 +2410,7 @@
                             DenseMap<const BasicBlock*, MachineBasicBlock*> &bm,
                             DenseMap<const AllocaInst *, int> &am
 #ifndef NDEBUG
-                          , SmallSet<Instruction*, 8> &cil
+                          , SmallSet<const Instruction *, 8> &cil
 #endif
                                   ) {
   return X86::createFastISel(mf, vm, bm, am