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[Bug rtl-optimization/24123] Massive performance regression for -ffast-math due to the recip tree pass
- From: "uros at kss-loka dot si" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Sep 2005 14:11:16 -0000
- Subject: [Bug rtl-optimization/24123] Massive performance regression for -ffast-math due to the recip tree pass
- References: <20050929140549.24123.uros@kss-loka.si>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From uros at kss-loka dot si 2005-09-29 14:11 -------
Created an attachment (id=9837)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9837&action=view)
gcc -O2 -ffast-math
Testcase, compile with gcc -O2 -ffast-math. The same problem can be found in
povray-3.6.1/source/fnpovfpu.cpp, POVFPU_RunDefault() when compiled with
-ffast-math.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24123