Move isSubRegister() and isSuperRegister to MCRegisterInfo.

These were defined on TargetRegisterInfo, but they don't use any information
that's not available in MCRegisterInfo, so sink them down to be available
at the MC layer.

llvm-svn: 170608

llvm/include/llvm/MC/MCRegisterInfo.h

@@ -386,6 +386,14 @@ public:
     return RegEncodingTable[RegNo];
   }
 
+  /// Returns true if regB is a sub-register of regA.
+  bool isSubRegister(unsigned regA, unsigned regB) const {
+    return isSuperRegister(regB, regA);
+  }
+
+  /// Returns true if regB is a super-register of regA.
+  bool isSuperRegister(unsigned RegA, unsigned RegB) const;
+
 };
 
 //===----------------------------------------------------------------------===//
@@ -426,6 +434,15 @@ public:
   }
 };
 
+// Definition for isSuperRegister. Put it down here since it needs the
+// iterator defined above in addition to the MCRegisterInfo class itself.
+inline bool MCRegisterInfo::isSuperRegister(unsigned RegA, unsigned RegB) const{
+  for (MCSuperRegIterator I(RegA, this); I.isValid(); ++I)
+    if (*I == RegB)
+      return true;
+  return false;
+}
+
 //===----------------------------------------------------------------------===//
 //                               Register Units
 //===----------------------------------------------------------------------===//

llvm/include/llvm/Target/TargetRegisterInfo.h

@@ -388,21 +388,6 @@ public:
     return false;
   }
 
-  /// isSubRegister - Returns true if regB is a sub-register of regA.
-  ///
-  bool isSubRegister(unsigned regA, unsigned regB) const {
-    return isSuperRegister(regB, regA);
-  }
-
-  /// isSuperRegister - Returns true if regB is a super-register of regA.
-  ///
-  bool isSuperRegister(unsigned RegA, unsigned RegB) const {
-    for (MCSuperRegIterator I(RegA, this); I.isValid(); ++I)
-      if (*I == RegB)
-        return true;
-    return false;
-  }
-
   /// getCalleeSavedRegs - Return a null-terminated list of all of the
   /// callee saved registers on this target. The register should be in the
   /// order of desired callee-save stack frame offset. The first register is