77152a6b7a
Optimize the filename glob pattern matching in LinkerScript::computeInputSections() and LinkerScript::shouldKeep(). Add InputFile::getNameForScript() which gets and if required caches the Inputfile's name used for linker script matching. This avoids the overhead of name creation that was in getFilename() in LinkerScript.cpp. Add InputSectionDescription::matchesFile() and SectionPattern::excludesFile() which perform the glob pattern matching for an InputFile and make use of a cache of the previous result. As both computeInputSections() and shouldKeep() process sections in order and the sections of the same InputFile are contiguous, these single entry caches can significantly speed up performance for more complex glob patterns. These changes have been seen to reduce link time with --gc-sections by up to ~40% with linker scripts that contain KEEP filename glob patterns such as "*crtbegin*.o". Differential Revision: https://reviews.llvm.org/D87469
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
//===- ARMErrataFix.h -------------------------------------------*- C++ -*-===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLD_ELF_ARMA8ERRATAFIX_H
|
|
#define LLD_ELF_ARMA8ERRATAFIX_H
|
|
|
|
#include "lld/Common/LLVM.h"
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include <map>
|
|
#include <vector>
|
|
|
|
namespace lld {
|
|
namespace elf {
|
|
|
|
class Defined;
|
|
class InputSection;
|
|
class InputSectionDescription;
|
|
class OutputSection;
|
|
class Patch657417Section;
|
|
|
|
class ARMErr657417Patcher {
|
|
public:
|
|
// Return true if Patches have been added to the OutputSections.
|
|
bool createFixes();
|
|
|
|
private:
|
|
std::vector<Patch657417Section *>
|
|
patchInputSectionDescription(InputSectionDescription &isd);
|
|
|
|
void insertPatches(InputSectionDescription &isd,
|
|
std::vector<Patch657417Section *> &patches);
|
|
|
|
void init();
|
|
|
|
// A cache of the mapping symbols defined by the InputSection sorted in order
|
|
// of ascending value with redundant symbols removed. These describe
|
|
// the ranges of code and data in an executable InputSection.
|
|
llvm::DenseMap<InputSection *, std::vector<const Defined *>> sectionMap;
|
|
|
|
bool initialized = false;
|
|
};
|
|
|
|
} // namespace elf
|
|
} // namespace lld
|
|
|
|
#endif
|