6 Commits

Author	SHA1	Message	Date
Rafael Espindola	6a86e25d90	Pass a reference to a module to the bitcode writer. ... This simplifies most callers as they are already using references or std::unique_ptr. llvm-svn: 325155	2018-02-14 19:11:32 +00:00
Eugene Zelenko	975293f0e5	[Bitcode] Fix some Clang-tidy modernize-use-using and Include What You Use warnings; other minor fixes (NFC). ... llvm-svn: 312760	2017-09-07 23:28:24 +00:00
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
Vedant Kumar	bb35249308	Avoid some string copies, NFC ... llvm-svn: 299993	2017-04-11 22:11:46 +00:00
Peter Collingbourne	98d40e0557	llvm-cat: Allow bitcode files to be created with no modules. ... llvm-svn: 289610	2016-12-13 23:14:55 +00:00
Peter Collingbourne	5a0a2e648c	Bitcode: Introduce BitcodeWriter interface. ... This interface allows clients to write multiple modules to a single bitcode file. Also introduce the llvm-cat utility which can be used to create a bitcode file containing multiple modules. Differential Revision: https://reviews.llvm.org/D26179 llvm-svn: 288195	2016-11-29 20:43:47 +00:00