[Bug rtl-optimization/17236] inefficient code for long long multiply on x86

[cvs-commit 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



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17236