1 files changed, 29 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86MacroFusion.h b/llvm/lib/Target/X86/X86MacroFusion.h
new file mode 100644
index 000000000000..d4ae54f657a5
--- /dev/null
+++ b/llvm/lib/Target/X86/X86MacroFusion.h
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+//===- X86MacroFusion.h - X86 Macro Fusion --------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file This file contains the X86 definition of the DAG scheduling mutation
+///  to pair instructions back to back.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_X86_X86MACROFUSION_H
+#define LLVM_LIB_TARGET_X86_X86MACROFUSION_H
+
+#include "llvm/CodeGen/MachineScheduler.h"
+
+namespace llvm {
+
+/// Note that you have to add:
+///   DAG.addMutation(createX86MacroFusionDAGMutation());
+/// to X86PassConfig::createMachineScheduler() to have an effect.
+std::unique_ptr<ScheduleDAGMutation>
+createX86MacroFusionDAGMutation();
+
+} // end namespace llvm
+
+#endif