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llvm-project/lld/ELF/CMakeLists.txt

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[ELF2] Add a new ELF linker based on the new PE/COFF linker. Differential Revision: http://reviews.llvm.org/D11188 llvm-svn: 243161
2015-07-25 05:03:07 +08:00
set(LLVM_TARGET_DEFINITIONS Options.td)
tablegen(LLVM Options.inc -gen-opt-parser-defs)
add_public_tablegen_target(ELFOptionsTableGen)
Rename elf2 to elf. llvm-svn: 262159
2016-02-28 08:25:54 +08:00
add_lld_library(lldELF
[ELF2] Add a new ELF linker based on the new PE/COFF linker. Differential Revision: http://reviews.llvm.org/D11188 llvm-svn: 243161
2015-07-25 05:03:07 +08:00
Driver.cpp
DriverUtils.cpp
Move the error handling functions to Error.h. NFC. llvm-svn: 244216
2015-08-06 23:08:23 +08:00
Error.cpp
ELF: Implement ICF. This patch implements the same algorithm as LLD/COFF's ICF. I'm not going to repeat the same description about how it works, so you want to read the comment in ICF.cpp in this patch if you want to know the details. This algorithm should be more powerful than the ICF algorithm implemented in GNU gold. It can even merge mutually-recursive functions (which is harder than one might think). ICF is a fairly effective size optimization. Here are some examples. LLD: 37.14 MB -> 35.80 MB (-3.6%) Clang: 59.41 MB -> 57.80 MB (-2.7%) The lacking feature is "safe" version of ICF. This merges all identical sections. That is not compatible with a C/C++ language requirement that two distinct functions must have distinct addresses. But as long as your program do not rely on the pointer equality (which is in many cases true), your program should work with the feature. LLD works fine for example. GNU gold implements so-called "safe ICF" that identifies functions that are safe to merge by heuristics -- for example, gold thinks that constructors are safe to merge because there is no way to take an address of a constructor in C++. We have a different idea which David Majnemer suggested that we add NOPs at beginning of merged functions so that two or more pointers can have distinct values. We can do whichever we want, but this patch does not include neither. http://reviews.llvm.org/D17529 llvm-svn: 261912
2016-02-26 02:43:51 +08:00
ICF.cpp
[ELF2] Add a new ELF linker based on the new PE/COFF linker. Differential Revision: http://reviews.llvm.org/D11188 llvm-svn: 243161
2015-07-25 05:03:07 +08:00
InputFiles.cpp
Rename Chunks.(h|cpp) to InputSection.(h|cpp). NFC. llvm-svn: 248226
2015-09-22 08:01:39 +08:00
InputSection.cpp
ELF2: Create LinkerScript.cpp and move code from DriverUtils to there. llvm-svn: 248920
2015-10-01 01:23:26 +08:00
LinkerScript.cpp
ELF2: Implement --gc-sections. Section garbage collection is a feature to remove unused sections from outputs. Unused sections are sections that cannot be reachable from known GC-root symbols or sections. Naturally the feature is implemented as a mark-sweep garbage collector. In this patch, I added Live bit to InputSectionBase. If and only if Live bit is on, the section will be written to the output. Starting from GC-root symbols or sections, a new function, markLive(), visits all reachable sections and sets their Live bits. Writer then ignores sections whose Live bit is off, so that such sections are excluded from the output. This change has small negative impact on performance if you use the feature because making sections means more work. The time to link Clang changes from 0.356s to 0.386s, or +8%. It reduces Clang size from 57,764,984 bytes to 55,296,600 bytes. That is 4.3% reduction. http://reviews.llvm.org/D13950 llvm-svn: 251043
2015-10-23 02:49:53 +08:00
MarkLive.cpp
Move OutputSectionBase and derived classes out of Writer.cpp. The file was getting a bit too big and OutputSection is a central enough concept in ELF linking to justify its own file. llvm-svn: 248214
2015-09-22 05:38:08 +08:00
OutputSections.cpp
[ELF2] Add a new ELF linker based on the new PE/COFF linker. Differential Revision: http://reviews.llvm.org/D11188 llvm-svn: 243161
2015-07-25 05:03:07 +08:00
SymbolTable.cpp
Symbols.cpp
Start adding target abstractions. This is just enough to get PLT working on 32 bit x86. The idea behind using a virtual interface is that it should be easy to convert any of the functions to template parameters if any turns out to be performance critical. llvm-svn: 248308
2015-09-23 02:19:46 +08:00
Target.cpp
[ELF2] Add a new ELF linker based on the new PE/COFF linker. Differential Revision: http://reviews.llvm.org/D11188 llvm-svn: 243161
2015-07-25 05:03:07 +08:00
Writer.cpp
LINK_COMPONENTS
Fix BUILD_SHARED_LIBS build. llvm-svn: 262345
2016-03-01 23:56:53 +08:00
${LLVM_TARGETS_TO_BUILD}
BitReader
ELF: link with BitWriter module Fixes build broken by r263055. llvm-svn: 263064
2016-03-10 05:38:04 +08:00
BitWriter
Fix BUILD_SHARED_LIBS build. llvm-svn: 262345
2016-03-01 23:56:53 +08:00
Core
Linker
[ELF2] Add a new ELF linker based on the new PE/COFF linker. Differential Revision: http://reviews.llvm.org/D11188 llvm-svn: 243161
2015-07-25 05:03:07 +08:00
Object
Option
ELF: Create a string table. For now only the sections are in it, but it already makes the output easier to read and test. llvm-svn: 244702
2015-08-12 08:00:24 +08:00
MC
[ELF2] Add a new ELF linker based on the new PE/COFF linker. Differential Revision: http://reviews.llvm.org/D11188 llvm-svn: 243161
2015-07-25 05:03:07 +08:00
Support
Fix BUILD_SHARED_LIBS build. llvm-svn: 262345
2016-03-01 23:56:53 +08:00
Target
Move functionality of UniversalDriver to the entry point file. UniversalDriver was used as a dispatcher to each platform-specific driver. It had its own Options.td file. It was not just too much to parse only a few options (we only want to parse -core, -flavor or argv[0]), but also interpreted arguments too early. For example, if you invoke lld as "lld -flavor gnu ... -help", then you'd get the UniversalDriver's help message instead of GnuDriver's. This patch eliminates the use of Options from the dispatcher. http://reviews.llvm.org/D17686 llvm-svn: 262190
2016-02-29 03:50:14 +08:00
LINK_LIBS
lldConfig
[ELF2] Add a new ELF linker based on the new PE/COFF linker. Differential Revision: http://reviews.llvm.org/D11188 llvm-svn: 243161
2015-07-25 05:03:07 +08:00
)
Rename elf2 to elf. llvm-svn: 262159
2016-02-28 08:25:54 +08:00
add_dependencies(lldELF ELFOptionsTableGen)