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[Bug middle-end/44382] Slow integer multiply
- From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 21 Oct 2011 14:41:13 +0000
- Subject: [Bug middle-end/44382] Slow integer multiply
- Auto-submitted: auto-generated
- References: <bug-44382-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44382
--- Comment #10 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2011-10-21 14:41:13 UTC ---
One more data point. I repeated the experiment using -fsched-pressure.
Although this reduced the degradations considerably, the overall results are
equivocal. I see a few improvements and a few degradations in the 1-4% range,
with the geometric means essentially unchanged. So even if -fsched-pressure
were the default, there wouldn't be an overwhelming case for enabling this
support on powerpc64.