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Hongtao Yu 2638aafe12 [LLD][ThinLTO] Add --thinlto-single-module to allow compiling partial modules. 
This change introduces an LLD switch --thinlto-single-module to allow compiling only a part of the input modules. This is specifically enables:

  1. Fast investigating/debugging modules of interest without spending time on compiling unrelated modules.
  2. Compiler debug dump with -mllvm -debug-only= for specific modules.

It will be useful for large applications which has 1K+ input modules for thinLTO.

The switch can be combined with `--lto-obj-path=` or `--lto-emit-asm` to obtain intermediate object files or assembly files. So far the module name matching is implemented as a fuzzy name lookup where the modules with name containing the switch value are compiled.

E.g,
Command:
     ld.lld main.o thin.a --thinlto-single-module=thin.a --lto-obj-path=single.o
log:
     [ThinLTO] Selecting thin.a(thin1.o at 168) to compile
     [ThinLTO] Selecting thin.a(thin2.o at 228) to compile
Command:
     ld.lld main.o thin.a --thinlto-single-module=thin1.o --lto-obj-path=single.o
log:
     [ThinLTO] Selecting thin.a(thin1.o at 168) to compile

Differential Revision: https://reviews.llvm.org/D80406
 		2020-06-10 15:32:30 -07:00
..
COFF [COFF] Free some memory used for chunks 2020-06-01 18:51:47 -07:00
Common FileOutputBuffer.h - remove unused includes. NFC. 2020-05-28 14:38:12 +01:00
ELF [LLD][ThinLTO] Add --thinlto-single-module to allow compiling partial modules. 2020-06-10 15:32:30 -07:00
MachO lld: initial pass at supporting TBD 2020-06-08 18:15:40 -07:00
MinGW [LLD/MinGW]: Expose --thinlto-cache-dir 2020-05-24 12:30:56 +03:00
cmake/modules lld: Let find_package(LLD) work 2020-05-14 09:59:53 -04:00
docs [ELF] Refine --export-dynamic-symbol semantics to be compatible GNU ld 2.35 2020-06-01 11:30:03 -07:00
include/lld [LLD] Have only one SpecificAllocator per type 2020-06-02 14:09:09 -07:00
lib lld: use `std::make_unique` (NFC) 2020-06-03 19:23:13 +00:00
test [LLD][ThinLTO] Add --thinlto-single-module to allow compiling partial modules. 2020-06-10 15:32:30 -07:00
tools/lld Reland D78837 [lld] Remove special cases from default ld driver mode. 2020-04-29 14:45:44 -07:00
unittests Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
utils Python 2/3 compatibility 2019-03-20 07:42:13 +00:00
wasm [WebAssembly] Add placeholders for R_WASM_TABLE_INDEX_REL_SLEB relocations 2020-05-29 10:57:26 -07:00
.clang-format
…
.clang-tidy [lld] Add .clang-tidy to customize readability-identifier-naming.{Member,Parameter,Variable}Case => camelBack 2020-03-09 08:26:41 -07:00
.gitignore
…
CMakeLists.txt lld: Let find_package(LLD) work 2020-05-14 09:59:53 -04:00
CODE_OWNERS.TXT
…
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
README.md
…

README.md

LLVM Linker (lld)

This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.

lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.

Benchmarking

In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.

It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz

The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.