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* [Bug optimization/15348] New: [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. @ 2004-05-09 19:30 kazu at cs dot umass dot edu 2004-05-09 19:32 ` [Bug optimization/15348] " kazu at cs dot umass dot edu ` (3 more replies) 0 siblings, 4 replies; 10+ messages in thread From: kazu at cs dot umass dot edu @ 2004-05-09 19:30 UTC (permalink / raw) To: gcc-bugs Convert foo() into baz(). void bar (void); int foo (int x, int y) { int t1 = x < 0; int t2 = y < 0; return t1 || t2; } int baz (int x, int y) { return (x | y) < 0; } Needless to mention, we should do this fairly late in SSA optimizations. -- Summary: [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. Product: gcc Version: tree-ssa Status: UNCONFIRMED Keywords: pessimizes-code Severity: enhancement Priority: P2 Component: optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: kazu at cs dot umass dot edu CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 ^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. 2004-05-09 19:30 [Bug optimization/15348] New: [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0 kazu at cs dot umass dot edu @ 2004-05-09 19:32 ` kazu at cs dot umass dot edu 2004-05-09 19:41 ` pinskia at gcc dot gnu dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 10+ messages in thread From: kazu at cs dot umass dot edu @ 2004-05-09 19:32 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From kazu at cs dot umass dot edu 2004-05-09 19:32 ------- Another one just like above: void bar (void); void foo (int a, int b) { if (a != 0) return; if (b != 0) return; bar (); } void baz (int a, int b) { if ((a | b) == 0) bar (); } See also PR 15241. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 ^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. 2004-05-09 19:30 [Bug optimization/15348] New: [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0 kazu at cs dot umass dot edu 2004-05-09 19:32 ` [Bug optimization/15348] " kazu at cs dot umass dot edu @ 2004-05-09 19:41 ` pinskia at gcc dot gnu dot org 2004-05-09 22:11 ` pinskia at gcc dot gnu dot org 2004-05-25 0:09 ` [Bug tree-optimization/15348] " pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 10+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-05-09 19:41 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-05-09 19:41 ------- Confirmed. -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed| |1 Last reconfirmed|0000-00-00 00:00:00 |2004-05-09 19:41:56 date| | Target Milestone|--- |tree-ssa http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 ^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. 2004-05-09 19:30 [Bug optimization/15348] New: [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0 kazu at cs dot umass dot edu 2004-05-09 19:32 ` [Bug optimization/15348] " kazu at cs dot umass dot edu 2004-05-09 19:41 ` pinskia at gcc dot gnu dot org @ 2004-05-09 22:11 ` pinskia at gcc dot gnu dot org 2004-05-25 0:09 ` [Bug tree-optimization/15348] " pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 10+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-05-09 22:11 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- BugsThisDependsOn| |15357 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 ^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. 2004-05-09 19:30 [Bug optimization/15348] New: [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0 kazu at cs dot umass dot edu ` (2 preceding siblings ...) 2004-05-09 22:11 ` pinskia at gcc dot gnu dot org @ 2004-05-25 0:09 ` pinskia at gcc dot gnu dot org 3 siblings, 0 replies; 10+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-05-25 0:09 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|3.5.0 |--- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 ^ permalink raw reply [flat|nested] 10+ messages in thread
[parent not found: <20040509193050.15348.kazu@gcc.gnu.org>]
* [Bug tree-optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. [not found] <20040509193050.15348.kazu@gcc.gnu.org> @ 2005-09-30 22:29 ` steven at gcc dot gnu dot org 0 siblings, 0 replies; 10+ messages in thread From: steven at gcc dot gnu dot org @ 2005-09-30 22:29 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From steven at gcc dot gnu dot org 2005-09-30 22:29 ------- For AMD64, the functions from the first test case don't produce the same code either, so combine is not catching this either. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 ^ permalink raw reply [flat|nested] 10+ messages in thread
[parent not found: <bug-15348-4@http.gcc.gnu.org/bugzilla/>]
* [Bug tree-optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. [not found] <bug-15348-4@http.gcc.gnu.org/bugzilla/> @ 2013-11-09 20:40 ` pinskia at gcc dot gnu.org 2014-10-31 4:01 ` pinskia at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 10+ messages in thread From: pinskia at gcc dot gnu.org @ 2013-11-09 20:40 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 Bug 15348 depends on bug 15357, which changed state. Bug 15357 Summary: [tree-ssa] combing if statements http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15357 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED ^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. [not found] <bug-15348-4@http.gcc.gnu.org/bugzilla/> 2013-11-09 20:40 ` pinskia at gcc dot gnu.org @ 2014-10-31 4:01 ` pinskia at gcc dot gnu.org 2020-03-11 7:06 ` dimhen at gmail dot com 2020-04-19 18:17 ` law at redhat dot com 3 siblings, 0 replies; 10+ messages in thread From: pinskia at gcc dot gnu.org @ 2014-10-31 4:01 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 Bug 15348 depends on bug 15459, which changed state. Bug 15459 Summary: [meta-bug] there should be a tree combiner like the rtl one https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15459 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED ^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. [not found] <bug-15348-4@http.gcc.gnu.org/bugzilla/> 2013-11-09 20:40 ` pinskia at gcc dot gnu.org 2014-10-31 4:01 ` pinskia at gcc dot gnu.org @ 2020-03-11 7:06 ` dimhen at gmail dot com 2020-04-19 18:17 ` law at redhat dot com 3 siblings, 0 replies; 10+ messages in thread From: dimhen at gmail dot com @ 2020-03-11 7:06 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 Dmitry G. Dyachenko <dimhen at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dimhen at gmail dot com --- Comment #4 from Dmitry G. Dyachenko <dimhen at gmail dot com> --- x86_64 r10-7080 for me produce identical code -- c#0 with -O2 -- c#1 with -O ^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/15348] [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0. [not found] <bug-15348-4@http.gcc.gnu.org/bugzilla/> ` (2 preceding siblings ...) 2020-03-11 7:06 ` dimhen at gmail dot com @ 2020-04-19 18:17 ` law at redhat dot com 3 siblings, 0 replies; 10+ messages in thread From: law at redhat dot com @ 2020-04-19 18:17 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15348 Jeffrey A. Law <law at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |law at redhat dot com Resolution|--- |FIXED Status|NEW |RESOLVED --- Comment #5 from Jeffrey A. Law <law at redhat dot com> --- Resolved at some point in the past. Not worth the trouble to bisect. ^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2020-04-19 18:17 UTC | newest] Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2004-05-09 19:30 [Bug optimization/15348] New: [tree-ssa] Convert (x < 0) || (y < 0) into (x | y) < 0 kazu at cs dot umass dot edu 2004-05-09 19:32 ` [Bug optimization/15348] " kazu at cs dot umass dot edu 2004-05-09 19:41 ` pinskia at gcc dot gnu dot org 2004-05-09 22:11 ` pinskia at gcc dot gnu dot org 2004-05-25 0:09 ` [Bug tree-optimization/15348] " pinskia at gcc dot gnu dot org [not found] <20040509193050.15348.kazu@gcc.gnu.org> 2005-09-30 22:29 ` steven at gcc dot gnu dot org [not found] <bug-15348-4@http.gcc.gnu.org/bugzilla/> 2013-11-09 20:40 ` pinskia at gcc dot gnu.org 2014-10-31 4:01 ` pinskia at gcc dot gnu.org 2020-03-11 7:06 ` dimhen at gmail dot com 2020-04-19 18:17 ` law at redhat dot com
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