[Bug debug/59992] [4.9 Regression] Compilation of insn-recog.c too slow due to var-tracking

[aoliva at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59992

--- Comment #12 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Fri Feb 28 12:57:40 2014
New Revision: 208221

URL: http://gcc.gnu.org/viewcvs?rev=208221&root=gcc&view=rev
Log:
PR debug/59992
* cselib.c (cselib_hasher::equal): Special-case VALUE lookup.
(cselib_preserved_hash_table): New.
(preserve_constants_and_equivs): Move preserved vals to it.
(cselib_find_slot): Look it up first.
(cselib_init): Initialize it.
(cselib_finish): Release it.
(dump_cselib_table): Dump it.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cselib.c