1 files changed, 6 insertions, 0 deletions
diff --git a/utils/TableGen/CodeGenTarget.h b/utils/TableGen/CodeGenTarget.h
index 1ab2de269c76..d52ffac4ce6c 100644
--- a/utils/TableGen/CodeGenTarget.h
+++ b/utils/TableGen/CodeGenTarget.h
@@ -103,6 +103,12 @@ public:
   /// getRegBank - Return the register bank description.
   CodeGenRegBank &getRegBank() const;
 
+  /// Return the largest register class on \p RegBank which supports \p Ty and
+  /// covers \p SubIdx if it exists.
+  Optional<CodeGenRegisterClass *>
+  getSuperRegForSubReg(const ValueTypeByHwMode &Ty, CodeGenRegBank &RegBank,
+                       const CodeGenSubRegIndex *SubIdx) const;
+
   /// getRegisterByName - If there is a register with the specific AsmName,
   /// return it.
   const CodeGenRegister *getRegisterByName(StringRef Name) const;