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[Bug target/25500] REGREGRESSION: SSE2 vectorized code is many times slower on 4.x.x than on 3.4.4
- 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: 20 Dec 2005 06:36:49 -0000
- Subject: [Bug target/25500] REGREGRESSION: SSE2 vectorized code is many times slower on 4.x.x than on 3.4.4
- References: <bug-25500-6649@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #8 from pinskia at gcc dot gnu dot org 2005-12-20 06:36 -------
Can you show what the output of "gcc -v" for the 3.4 compiler and the 4.0
compiler?
This looks like just a different using arch by default.
a Compiler compiled for i686 by default gives the good code but code compiled
for i386 give bad code.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25500