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[Bug middle-end/23971] [4.0/4.1 Regression] synth_mult running amok
- From: "tsv at solvo dot ru" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 24 Sep 2005 20:29:16 -0000
- Subject: [Bug middle-end/23971] [4.0/4.1 Regression] synth_mult running amok
- References: <20050919192030.23971.tsv@solvo.ru>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From tsv at solvo dot ru 2005-09-24 20:29 -------
It takes about 10 minutes to compile attached testcase with -O2 -mcpu=ev4 and
about 2 minutes for -O2 -mcpu=ev5 (compiled on EV45 233Mhz).
The difference is in cost of multiply op - 100 for ev4 and about 54 for ev5.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23971