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* [Bug tree-optimization/23133] New: recip does not factor division by function parameter @ 2005-07-29 13:36 rguenth at gcc dot gnu dot org 2005-07-29 13:50 ` [Bug tree-optimization/23133] " pinskia at gcc dot gnu dot org ` (4 more replies) 0 siblings, 5 replies; 6+ messages in thread From: rguenth at gcc dot gnu dot org @ 2005-07-29 13:36 UTC (permalink / raw) To: gcc-bugs The following testcase, compiled with -O2 -ffast-math should have 1/d factored out, but doesn't, because d is a function parameter and recip walks SSA_NAME defs, and d does not have one. double a, b; int x; double foo(double d) { if (x) a/=d; return a/d + b/d; } -- Summary: recip does not factor division by function parameter Product: gcc Version: 4.1.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: enhancement Priority: P2 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rguenth at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23133 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/23133] recip does not factor division by function parameter 2005-07-29 13:36 [Bug tree-optimization/23133] New: recip does not factor division by function parameter rguenth at gcc dot gnu dot org @ 2005-07-29 13:50 ` pinskia at gcc dot gnu dot org 2005-07-29 14:45 ` rguenth at gcc dot gnu dot org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-07-29 13:50 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-07-29 13:45 ------- Confirmed, another testcase (which might be needed as the redundant load of a and b are not done): double a, b; int x; double foo(double d) { double a1 = a, b1 = b; if (x) a1/=d; return (a1/d) * (b1/d); } -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed| |1 Last reconfirmed|0000-00-00 00:00:00 |2005-07-29 13:45:43 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23133 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/23133] recip does not factor division by function parameter 2005-07-29 13:36 [Bug tree-optimization/23133] New: recip does not factor division by function parameter rguenth at gcc dot gnu dot org 2005-07-29 13:50 ` [Bug tree-optimization/23133] " pinskia at gcc dot gnu dot org @ 2005-07-29 14:45 ` rguenth at gcc dot gnu dot org 2005-08-01 8:58 ` cvs-commit at gcc dot gnu dot org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu dot org @ 2005-07-29 14:45 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From rguenth at gcc dot gnu dot org 2005-07-29 14:28 ------- I have a patch for this. -- What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot |dot org |org Status|NEW |ASSIGNED Last reconfirmed|2005-07-29 13:45:43 |2005-07-29 14:28:55 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23133 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/23133] recip does not factor division by function parameter 2005-07-29 13:36 [Bug tree-optimization/23133] New: recip does not factor division by function parameter rguenth at gcc dot gnu dot org 2005-07-29 13:50 ` [Bug tree-optimization/23133] " pinskia at gcc dot gnu dot org 2005-07-29 14:45 ` rguenth at gcc dot gnu dot org @ 2005-08-01 8:58 ` cvs-commit at gcc dot gnu dot org 2005-08-01 8:58 ` rguenth at gcc dot gnu dot org 2005-08-01 8:59 ` rguenth at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: cvs-commit at gcc dot gnu dot org @ 2005-08-01 8:58 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-08-01 08:58 ------- Subject: Bug 23133 CVSROOT: /cvs/gcc Module name: gcc Changes by: rguenth@gcc.gnu.org 2005-08-01 08:58:25 Modified files: gcc : ChangeLog tree-ssa-math-opts.c Log message: 2005-08-01 Richard Guenther <rguenther@suse.de> PR tree-optimization/23133 * tree-ssa-math-opts.c (execute_cse_reciprocals): Walk current functions parameter decls to find defs to cse reciprocals of. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9623&r2=2.9624 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-math-opts.c.diff?cvsroot=gcc&r1=2.3&r2=2.4 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23133 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/23133] recip does not factor division by function parameter 2005-07-29 13:36 [Bug tree-optimization/23133] New: recip does not factor division by function parameter rguenth at gcc dot gnu dot org ` (2 preceding siblings ...) 2005-08-01 8:58 ` cvs-commit at gcc dot gnu dot org @ 2005-08-01 8:58 ` rguenth at gcc dot gnu dot org 2005-08-01 8:59 ` rguenth at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu dot org @ 2005-08-01 8:58 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From rguenth at gcc dot gnu dot org 2005-08-01 08:58 ------- Fixed. -- What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23133 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/23133] recip does not factor division by function parameter 2005-07-29 13:36 [Bug tree-optimization/23133] New: recip does not factor division by function parameter rguenth at gcc dot gnu dot org ` (3 preceding siblings ...) 2005-08-01 8:58 ` rguenth at gcc dot gnu dot org @ 2005-08-01 8:59 ` rguenth at gcc dot gnu dot org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu dot org @ 2005-08-01 8:59 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.1.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23133 ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-08-01 8:59 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2005-07-29 13:36 [Bug tree-optimization/23133] New: recip does not factor division by function parameter rguenth at gcc dot gnu dot org 2005-07-29 13:50 ` [Bug tree-optimization/23133] " pinskia at gcc dot gnu dot org 2005-07-29 14:45 ` rguenth at gcc dot gnu dot org 2005-08-01 8:58 ` cvs-commit at gcc dot gnu dot org 2005-08-01 8:58 ` rguenth at gcc dot gnu dot org 2005-08-01 8:59 ` rguenth at gcc dot gnu dot org
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