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[Bug tree-optimization/29789] Missed optimization in libquantum
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Nov 2006 01:55:58 -0000
- Subject: [Bug tree-optimization/29789] Missed optimization in libquantum
- References: <bug-29789-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from pinskia at gcc dot gnu dot org 2006-11-10 01:55 -------
> (it considers the shifts being of cost one)
depends on the target. On some targets (Cell), shifts with a constant shifter
is cheap (same as a normal add or subtract) while with a non constant one, it
is microcoded and every expensive.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2006-11-10 01:55:58
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29789