diff options
Diffstat (limited to 'contrib/llvm/lib/MC/MCSchedule.cpp')
-rw-r--r-- | contrib/llvm/lib/MC/MCSchedule.cpp | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/contrib/llvm/lib/MC/MCSchedule.cpp b/contrib/llvm/lib/MC/MCSchedule.cpp index 929bd7f6046c..1fc5ec5e975f 100644 --- a/contrib/llvm/lib/MC/MCSchedule.cpp +++ b/contrib/llvm/lib/MC/MCSchedule.cpp @@ -1,9 +1,8 @@ //===- MCSchedule.cpp - 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 // //===----------------------------------------------------------------------===// // @@ -150,3 +149,19 @@ MCSchedModel::getReciprocalThroughput(unsigned SchedClass, // that it can execute at the maximum default issue width. return 1.0 / DefaultIssueWidth; } + +unsigned +MCSchedModel::getForwardingDelayCycles(ArrayRef<MCReadAdvanceEntry> Entries, + unsigned WriteResourceID) { + if (Entries.empty()) + return 0; + + int DelayCycles = 0; + for (const MCReadAdvanceEntry &E : Entries) { + if (E.WriteResourceID != WriteResourceID) + continue; + DelayCycles = std::min(DelayCycles, E.Cycles); + } + + return std::abs(DelayCycles); +} |