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llvm-project/llvm/test/ThinLTO/X86
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Peter Collingbourne a0f371a106 Bitcode: Add a string table to the bitcode format. 
Add a top-level STRTAB block containing a string table blob, and start storing
strings for module codes FUNCTION, GLOBALVAR, ALIAS, IFUNC and COMDAT in
the string table.

This change allows us to share names between globals and comdats as well
as between modules, and improves the efficiency of loading bitcode files by
no longer using a bit encoding for symbol names. Once we start writing the
irsymtab to the bitcode file we will also be able to share strings between
it and the module.

On my machine, link time for Chromium for Linux with ThinLTO decreases by
about 7% for no-op incremental builds or about 1% for full builds. Total
bitcode file size decreases by about 3%.

As discussed on llvm-dev:
http://lists.llvm.org/pipermail/llvm-dev/2017-April/111732.html

Differential Revision: https://reviews.llvm.org/D31838

llvm-svn: 300464
 		2017-04-17 17:51:36 +00:00
..
Inputs LTO: Hash type identifier resolutions for WholeProgramDevirt. 2017-03-10 21:37:10 +00:00
alias_import.ll [ThinLTO] Only promote exported locals as marked in index 2016-11-14 19:21:41 +00:00
alias_resolution.ll [ThinLTO] Resolve LinkOnceAny 2016-05-26 14:16:52 +00:00
autoupgrade.ll Bitcode: Add a string table to the bitcode format. 2017-04-17 17:51:36 +00:00
cache-config.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
cache-import-lists.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
cache-typeid-resolutions.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
cache.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
crash_debuginfo.ll Verifier: Disallow a line number without a file in DISubprogram 2017-02-17 23:57:42 +00:00
deadstrip.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
debuginfo-compositetype-import.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
debuginfo-cu-import.ll Renumber testcase metadata nodes after r290153. 2016-12-22 00:45:21 +00:00
diagnostic-handler-remarks-with-hotness.ll [LTOs] Allow generation of hotness information 2016-12-02 17:53:56 +00:00
diagnostic-handler-remarks.ll [tests] Be explicit about the files we want to remove. 2017-02-10 22:55:37 +00:00
dicompositetype-unique.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
distributed_import.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
distributed_indexes.ll Bitcode: Add a string table to the bitcode format. 2017-04-17 17:51:36 +00:00
drop-debug-info.ll [ThinLTO] Rework llvm-link to use the FunctionImporter 2017-01-04 14:27:31 +00:00
emit_imports.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
empty_module_with_cache.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
error-newpm.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
export.ll [ThinLTO] Thin link efficiency improvement: don't re-export globals (NFC) 2016-12-15 23:50:06 +00:00
funcimport-tbaa.ll [ThinLTO] Fix assertions on lazy-loading of Metadata TBAA attachments 2017-01-07 20:24:23 +00:00
funcimport.ll [ThinLTO] Stop importing constant global vars as copies in the backend 2016-12-02 01:02:30 +00:00
funcimport2.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
import_opaque_type.ll [ThinLTO] Fix crash when importing an opaque type 2016-11-19 18:44:16 +00:00
internalize.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
lazyload_metadata.ll Add !associated metadata. 2017-03-17 22:17:24 +00:00
linkonce_aliasee_ref_import.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
linkonce_resolution_comdat.ll Temporarily revert "For X86-64 linux and PPC64 linux align int128 to 16 bytes." 2017-02-10 04:35:32 +00:00
lit.local.cfg
…
llvm.used.ll ThinLTO: fix assertion and refactor check for hidden use from inline ASM in a helper function 2016-05-06 08:25:33 +00:00
local_name_conflict.ll [ThinLTO] Import static functions from the same module as caller 2017-01-12 22:04:45 +00:00
module_asm2.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
module_asm_glob.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
prefix_replace.ll [ThinLTO] Use semicolon to separate path prefix replacement 2016-05-17 18:43:22 +00:00
reference_non_importable.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +00:00
referenced_by_constant.ll [ThinLTO] Stop importing constant global vars as copies in the backend 2016-12-02 01:02:30 +00:00
save_objects.ll [ThinLTO] Add an API to trigger file-based API for returning objects to the linker 2016-12-14 04:56:42 +00:00
section.ll ThinLTO: do not promote GlobalVariable that have a specific section. 2016-04-27 00:32:13 +00:00
select_right_alias_definition.ll FunctionImport: make sure we always select the right callee in presence of alias 2016-04-20 04:17:36 +00:00
tli-nobuiltin.ll Add support for -fno-builtin to LTO and ThinLTO to libLTO 2017-03-28 18:55:44 +00:00
weak_resolution.ll [ThinLTO] Drop non-prevailing non-ODR weak to declarations 2017-01-20 21:54:58 +00:00
weak_resolution_single.ll ThinLTO: Remove check for multiple modules before applying weak resolutions. 2016-07-07 01:51:11 +00:00