Switch AllocationOrder to using RegisterClassInfo instead of a BitVector
of reserved registers.

Use RegisterClassInfo in RABasic as well. This slightly changes som
allocation orders because RegisterClassInfo puts CSR aliases last.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132581 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocBase.h b/lib/CodeGen/RegAllocBase.h
index b25ea23..0316421 100644
--- a/lib/CodeGen/RegAllocBase.h
+++ b/lib/CodeGen/RegAllocBase.h
@@ -39,6 +39,7 @@
 
 #include "llvm/ADT/OwningPtr.h"
 #include "LiveIntervalUnion.h"
+#include "RegisterClassInfo.h"
 
 namespace llvm {
 
@@ -91,6 +92,7 @@
   MachineRegisterInfo *MRI;
   VirtRegMap *VRM;
   LiveIntervals *LIS;
+  RegisterClassInfo RegClassInfo;
   LiveUnionArray PhysReg2LiveUnion;
 
   // Current queries, one per physreg. They must be reinitialized each time we