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From: "cesarb at cesarb dot net" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/54201] XMM constant duplicated Date: Wed, 08 Aug 2012 23:29:00 -0000 [thread overview] Message-ID: <bug-54201-4-BKSLEU8au1@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-54201-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54201 --- Comment #3 from Cesar Eduardo Barros <cesarb at cesarb dot net> 2012-08-08 23:28:52 UTC --- Created attachment 27964 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27964 Another testcase Another testcase. This one also shows it using two registers instead of one. movdqa .LC0(%rip), %xmm3 pand %xmm3, %xmm0 movdqa .LC1(%rip), %xmm2 pcmpeqb %xmm2, %xmm0 pand %xmm1, %xmm0 pand %xmm3, %xmm0 pcmpeqb %xmm2, %xmm0 %xmm2 and %xmm3 have the same value, so it is increasing the register pressure unnecessarily.
next prev parent reply other threads:[~2012-08-08 23:29 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-08-08 11:31 [Bug target/54201] New: " cesarb at cesarb dot net 2012-08-08 11:32 ` [Bug target/54201] " cesarb at cesarb dot net 2012-08-08 11:53 ` [Bug middle-end/54201] " rguenth at gcc dot gnu.org 2012-08-08 23:29 ` cesarb at cesarb dot net [this message] 2012-08-09 9:50 ` rguenth at gcc dot gnu.org 2012-08-09 10:22 ` rguenth at gcc dot gnu.org 2012-08-13 12:43 ` rguenth at gcc dot gnu.org 2012-08-14 13:21 ` rguenth at gcc dot gnu.org 2012-08-14 14:38 ` rguenth at gcc dot gnu.org 2012-08-15 9:03 ` rguenth at gcc dot gnu.org 2020-08-31 8:30 ` cvs-commit at gcc dot gnu.org 2020-08-31 17:20 ` jakub at gcc dot gnu.org 2021-08-21 23:24 ` pinskia at gcc dot gnu.org 2021-08-21 23:28 ` pinskia at gcc dot gnu.org
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