vendor/llvm/llvm-trunk-r366426

1 files changed, 9 insertions, 4 deletions

diff --git a/include/llvm/MC/MCSchedule.h b/include/llvm/MC/MCSchedule.h
index 689ac73cbdd1..df3248ee6e86 100644
--- a/include/llvm/MC/MCSchedule.h
+++ b/include/llvm/MC/MCSchedule.h
@@ -1,9 +1,8 @@
 //===-- llvm/MC/MCSchedule.h - Scheduling -----------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -15,6 +14,7 @@
 #ifndef LLVM_MC_MCSCHEDULE_H
 #define LLVM_MC_MCSCHEDULE_H
 
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/Config/llvm-config.h"
 #include "llvm/Support/DataTypes.h"
@@ -370,6 +370,11 @@ struct MCSchedModel {
   getReciprocalThroughput(const MCSubtargetInfo &STI, const MCInstrInfo &MCII,
                           const MCInst &Inst) const;
 
+  /// Returns the maximum forwarding delay for register reads dependent on
+  /// writes of scheduling class WriteResourceIdx.
+  static unsigned getForwardingDelayCycles(ArrayRef<MCReadAdvanceEntry> Entries,
+                                           unsigned WriteResourceIdx = 0);
+
   /// Returns the default initialized model.
   static const MCSchedModel &GetDefaultSchedModel() { return Default; }
   static const MCSchedModel Default;