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diff --git a/lib/Target/MBlaze/MBlazeCallingConv.td b/lib/Target/MBlaze/MBlazeCallingConv.td
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index 0000000000..ddd49980e0
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+++ b/lib/Target/MBlaze/MBlazeCallingConv.td
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+//===- MBlazeCallingConv.td - Calling Conventions for MBlaze ----*- C++ -*-===//
+// 
+//                     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 MBlaze architecture.
+//===----------------------------------------------------------------------===//
+
+/// CCIfSubtarget - Match if the current subtarget has a feature F.
+class CCIfSubtarget<string F, CCAction A>: 
+  CCIf<!strconcat("State.getTarget().getSubtarget<MBlazeSubtarget>().", F), A>;
+
+//===----------------------------------------------------------------------===//
+// MBlaze ABI Calling Convention
+//===----------------------------------------------------------------------===//
+
+def RetCC_MBlaze : CallingConv<[
+  // i32 are returned in registers R3, R4
+  CCIfType<[i32], CCAssignToReg<[R3, R4]>>,
+
+  // f32 are returned in registers F3, F4
+  CCIfType<[f32], CCAssignToReg<[F3, F4]>>
+]>;