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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/53346] [4.6/4.7/4.8 Regression] Bad vectorization in the proc cptrf2 of rnflow.f90
Date: Fri, 18 May 2012 18:27:00 -0000 [thread overview]
Message-ID: <bug-53346-4-2nVnmzGVj5@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-53346-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53346
--- Comment #16 from Uros Bizjak <ubizjak at gmail dot com> 2012-05-18 18:24:43 UTC ---
Perf confirms this findings, the first loop:
0.02 : 401e10: movslq %edx,%rbx
5.04 : 401e13: movss -0x4(%rdi,%rbx,4),%xmm0
24.97 : 401e19: ucomiss (%r9),%xmm0
14.66 : 401e1d: cmova %ecx,%edx
15.37 : 401e20: sub $0x1,%ecx
0.00 : 401e23: sub $0x4,%r9
0.00 : 401e27: cmp %r10d,%ecx
0.00 : 401e2a: jne 401e10 <cptrf2_+0x230>
the second:
0.00 : 401e60: movslq %ecx,%r10
1.69 : 401e63: movss -0x4(%rdi,%r10,4),%xmm0
7.78 : 401e6a: ucomiss (%r9),%xmm0
4.75 : 401e6e: cmova %r11d,%ecx
4.52 : 401e72: sub $0x1,%r11d
0.00 : 401e76: sub $0x4,%r9
0.05 : 401e7a: cmp %eax,%r11d
0.00 : 401e7d: jne 401e60 <cptrf2_+0x280>
the third:
0.00 : 401ff8: movslq %edx,%r10
0.78 : 401ffb: movss -0x4(%rdi,%r10,4),%xmm0
3.14 : 402002: ucomiss (%r9),%xmm0
2.04 : 402006: cmova %ecx,%edx
1.89 : 402009: sub $0x4,%r9
0.00 : 40200d: sub $0x1,%ecx
0.00 : 402010: jne 401ff8 <cptrf2_+0x418>
next prev parent reply other threads:[~2012-05-18 18:25 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-14 15:44 [Bug tree-optimization/53346] New: " dominiq at lps dot ens.fr
2012-05-15 9:54 ` [Bug tree-optimization/53346] " rguenth at gcc dot gnu.org
2012-05-15 12:55 ` dominiq at lps dot ens.fr
2012-05-17 18:35 ` ubizjak at gmail dot com
2012-05-17 20:47 ` ubizjak at gmail dot com
2012-05-18 11:49 ` rguenth at gcc dot gnu.org
2012-05-18 14:28 ` rguenth at gcc dot gnu.org
2012-05-18 14:32 ` rguenth at gcc dot gnu.org
2012-05-18 14:49 ` ubizjak at gmail dot com
2012-05-18 14:52 ` dominiq at lps dot ens.fr
2012-05-18 15:13 ` ubizjak at gmail dot com
2012-05-18 17:32 ` ubizjak at gmail dot com
2012-05-18 17:34 ` ubizjak at gmail dot com
2012-05-18 17:46 ` ubizjak at gmail dot com
2012-05-18 17:48 ` ubizjak at gmail dot com
2012-05-18 17:56 ` pinskia at gcc dot gnu.org
2012-05-18 18:27 ` hjl.tools at gmail dot com
2012-05-18 18:27 ` ubizjak at gmail dot com [this message]
2012-05-18 19:45 ` dominiq at lps dot ens.fr
2012-05-19 23:50 ` dominiq at lps dot ens.fr
2012-09-07 11:59 ` [Bug target/53346] " rguenth at gcc dot gnu.org
2012-11-14 22:19 ` hubicka at gcc dot gnu.org
2012-11-14 22:38 ` hubicka at gcc dot gnu.org
2012-12-31 9:20 ` [Bug target/53346] [4.6/4.7/4.8 Regression] Bad if conversion in " pinskia at gcc dot gnu.org
2012-12-31 9:41 ` pinskia at gcc dot gnu.org
2022-09-26 3:22 ` cvs-commit at gcc dot gnu.org
2022-09-26 3:24 ` crazylht at gmail dot com
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