mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-04-08 05:10:29 +08:00
6d8eb96b44
Some files in gcc, like lto or tree, do large scale incremential hashing. The current jhash implementation of this could be likely improved by using an incremential hash that does not do a full rehashing for every new value added. This patch adds a new "inchash" class that abstracts the internal state of the hash. This makes it easier to plug in new hashes and also cleans up the code a bit. Right now it is just implemented in the same way as the old iterative hash in tree.c. The previous iterative hash code from tree.c moved into a new separate file. Also I fixed up all users to include the new header. It should not really significantly change any hashing by itself, it's mostly a cleanup at this point. v2: Remove begin. Add commutative interface. Add merge hash interface. Add add_flag. gcc/: 2014-07-25 Andi Kleen <ak@linux.intel.com> * Makefile.in (OBJS): Add inchash.o. (PLUGIN_HEADERS): Add inchash.h. * ipa-devirt.c: Include inchash.h. * lto-streamer-out.c: Dito. * tree-ssa-dom.c: Dito. * tree-ssa-pre.c: Dito. * tree-ssa-sccvn.c: Dito. * tree-ssa-tail-merge.c: Dito. * asan.c: Dito. * tree.c (iterative_hash_hashval_t): Move to ... (iterative_hash_host_wide_int): Move to ... * inchash.c: Here. New file. * tree.h (iterative_hash_hashval_t): Move to ... (iterative_hash_host_wide_int): Move to ... * inchash.h: Here. New file. gcc/lto/: 2014-07-25 Andi Kleen <ak@linux.intel.com> * lto.c: Include inchash.h From-SVN: r213054
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.