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diff --git a/include/llvm/IntrinsicsBlackfin.td b/include/llvm/IntrinsicsBlackfin.td
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+++ b/include/llvm/IntrinsicsBlackfin.td
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+//===- IntrinsicsBlackfin.td - Defines Blackfin intrinsics -*- tablegen -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines all of the blackfin-specific intrinsics.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+// Core synchronisation etc.
+//
+// These intrinsics have sideeffects. Each represent a single instruction, but
+// workarounds are sometimes required depending on the cpu.
+
+let TargetPrefix = "bfin" in {
+
+  // Execute csync instruction with workarounds
+  def int_bfin_csync : GCCBuiltin<"__builtin_bfin_csync">,
+          Intrinsic<[llvm_void_ty]>;
+
+  // Execute ssync instruction with workarounds
+  def int_bfin_ssync : GCCBuiltin<"__builtin_bfin_ssync">,
+          Intrinsic<[llvm_void_ty]>;
+
+  // Execute idle instruction with workarounds
+  def int_bfin_idle : GCCBuiltin<"__builtin_bfin_idle">,
+          Intrinsic<[llvm_void_ty]>;
+
+}