Spillers may alter MachineLoopInfo when breaking critical edges, so make it
non-const.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108734 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Spiller.h b/lib/CodeGen/Spiller.h
index 450447b..b907f21 100644
--- a/lib/CodeGen/Spiller.h
+++ b/lib/CodeGen/Spiller.h
@@ -51,7 +51,7 @@
 
   /// Create and return a spiller object, as specified on the command line.
   Spiller* createSpiller(MachineFunction *mf, LiveIntervals *li,
-                         const MachineLoopInfo *loopInfo, VirtRegMap *vrm);
+                         MachineLoopInfo *loopInfo, VirtRegMap *vrm);
 }
 
 #endif