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[Bug rtl-optimization/17236] inefficient code for long long multiply on x86
- 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: 14 Mar 2005 18:24:24 -0000
- Subject: [Bug rtl-optimization/17236] inefficient code for long long multiply on x86
- References: <20040830055039.17236.dann@godzilla.ics.uci.edu>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-14 18:24 -------
Subject: Bug 17236
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: sayle@gcc.gnu.org 2005-03-14 18:24:15
Modified files:
gcc : ChangeLog optabs.c
Log message:
PR rtl-optimization/17236
* optabs.c (expand_doubleword_mult): New helper function split out
from expand_binop. Permute the order in which instructions are
emitted to minimize the number of simultaneously live registers.
(expand_binop): Call expand_doubleword_mult to synthesize a double
word multiplication.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7846&r2=2.7847
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/optabs.c.diff?cvsroot=gcc&r1=1.260&r2=1.261
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17236