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[Bug rtl-optimization/13931] [3.4/4.0/4.1 Regression] combiner much slower on big basic blocks
- From: "cvs-commit at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 11 Oct 2005 23:46:05 -0000
- Subject: [Bug rtl-optimization/13931] [3.4/4.0/4.1 Regression] combiner much slower on big basic blocks
- References: <bug-13931-7849@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #36 from cvs-commit at gcc dot gnu dot org 2005-10-11 23:46 -------
Subject: Bug 13931
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: ian@gcc.gnu.org 2005-10-11 23:45:57
Modified files:
gcc : ChangeLog combine.c
Log message:
PR rtl-optimization/13931
* combine.c: Revert patch of 2003-05-14, and:
(try_combine): Only set elim_i1 and elim_i2 if the destination is
completely killed in the appropriate insn.
(distribute_notes): Don't skip multiple hard register test for
elim_i1 and elim_i2.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.10141&r2=2.10142
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/combine.c.diff?cvsroot=gcc&r1=1.504&r2=1.505
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13931