lld/MachO/BPSectionOrderer.h

   1 //===- BPSectionOrderer.h ---------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// This file uses Balanced Partitioning to order sections to improve startup
  10 /// time and compressed size.
  11 ///
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLD_MACHO_BPSECTION_ORDERER_H
  15 #define LLD_MACHO_BPSECTION_ORDERER_H
  16
  17 #include "llvm/ADT/DenseMap.h"
  18 #include "llvm/ADT/StringRef.h"
  19
  20 namespace lld::macho {
  21
  22 class InputSection;
  23
  24 /// Run Balanced Partitioning to find the optimal function and data order to
  25 /// improve startup time and compressed size.
  26 ///
  27 /// It is important that .subsections_via_symbols is used to ensure functions
  28 /// and data are in their own sections and thus can be reordered.
  29 llvm::DenseMap<const lld::macho::InputSection *, size_t>
  30 runBalancedPartitioning(size_t &highestAvailablePriority,
  31                         llvm::StringRef profilePath,
  32                         bool forFunctionCompression, bool forDataCompression,
  33                         bool compressionSortStartupFunctions, bool verbose);
  34
  35 } // namespace lld::macho
  36
  37 #endif