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llvm/test/ThinLTO/X86
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Peter Collingbourne 6163b4af73 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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300464 91177308-0d34-0410-b5e6-96231b3b80d8
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
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
funcimport2.ll llvm-lto2: Move the LTO::run() action behind a subcommand. 2017-04-11 18:12:00 +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
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
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
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
select_right_alias_definition.ll
tli-nobuiltin.ll Add support for -fno-builtin to LTO and ThinLTO to libLTO 2017-03-28 18:55:44 +00:00
weak_resolution_single.ll
weak_resolution.ll [ThinLTO] Drop non-prevailing non-ODR weak to declarations 2017-01-20 21:54:58 +00:00