Add MRegisterInfo::getNumRegs().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11058 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Target/MRegisterInfo.h

@@ -182,6 +182,12 @@ public:
     return get(RegNo).Name;
   }
 
+  /// getNumRegs - Return the number of registers this target has
+  /// (useful for sizing arrays holding per register information)
+  unsigned getNumRegs() const {
+    return NumRegs;
+  }
+
   virtual const unsigned* getCalleeSaveRegs() const = 0;