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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/32279] New: Fold 1.0/sqrt(x/y) to sqrt(y/x) Date: Sun, 10 Jun 2007 21:46:00 -0000 [thread overview] Message-ID: <bug-32279-10053@http.gcc.gnu.org/bugzilla/> (raw) This may even work for -funsafe-math-optimizations only (we round differently). One has to enumerate all interesting cases (mainly x == 0) and see if NaN/Inf are properly preserved in all cases. -- Summary: Fold 1.0/sqrt(x/y) to sqrt(y/x) Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: enhancement Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rguenth at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32279
next reply other threads:[~2007-06-10 21:46 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-06-10 21:46 rguenth at gcc dot gnu dot org [this message] 2007-06-11 6:36 ` [Bug middle-end/32279] " ubizjak at gmail dot com 2007-06-11 9:09 ` uros at gcc dot gnu dot org 2007-06-11 9:11 ` ubizjak at gmail dot com
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