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diff --git a/lib/Target/Blackfin/BlackfinCallingConv.td b/lib/Target/Blackfin/BlackfinCallingConv.td
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+//===--- BlackfinCallingConv.td - Calling Conventions ------*- tablegen -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This describes the calling conventions for the Blackfin architectures.
+//
+//===----------------------------------------------------------------------===//
+
+// Blackfin C Calling convention.
+def CC_Blackfin : CallingConv<[
+  CCIfType<[i16], CCPromoteToType<i32>>,
+  CCIfSRet<CCAssignToReg<[P0]>>,
+  CCAssignToReg<[R0, R1, R2]>,
+  CCAssignToStack<4, 4>
+]>;
+
+//===----------------------------------------------------------------------===//
+// Return Value Calling Conventions
+//===----------------------------------------------------------------------===//
+
+// Blackfin C return-value convention.
+def RetCC_Blackfin : CallingConv<[
+  CCIfType<[i16], CCPromoteToType<i32>>,
+  CCAssignToReg<[R0, R1]>
+]>;