Make constant string pointer into an array to remove a pointer lookup for every access.

llvm-svn: 186482
diff --git a/llvm/lib/CodeGen/RegAllocBase.h b/llvm/lib/CodeGen/RegAllocBase.h
index 064e40f..ccaabba 100644
--- a/llvm/lib/CodeGen/RegAllocBase.h
+++ b/llvm/lib/CodeGen/RegAllocBase.h
@@ -93,7 +93,7 @@
                                  SmallVectorImpl<LiveInterval*> &splitLVRs) = 0;
 
   // Use this group name for NamedRegionTimer.
-  static const char *TimerGroupName;
+  static const char TimerGroupName[];
 
 public:
   /// VerifyEnabled - True when -verify-regalloc is given.