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* [Bug tree-optimization/17955] New: Perform associative optimization when it is safe
@ 2004-10-12 20:38 fjahanian at apple dot com
2004-10-13 13:43 ` [Bug tree-optimization/17955] " pinskia at gcc dot gnu dot org
2005-07-26 13:14 ` dberlin at gcc dot gnu dot org
0 siblings, 2 replies; 3+ messages in thread
From: fjahanian at apple dot com @ 2004-10-12 20:38 UTC (permalink / raw)
To: gcc-bugs
PR/17892 was filed because gcc-4.0 performs an unsafe optimization of (X*C)*C into X*(C*C).
Fix to this PR prevents certain safe transformation; such as X*2.0*2.0->X*4.0 from taking place.
This PR is to track this enhancement.
--
Summary: Perform associative optimization when it is safe
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: tree-optimization
AssignedTo: roger at eyesopen dot com
ReportedBy: fjahanian at apple dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: apple-ppc-darwin
GCC host triplet: apple-ppc-darwin
GCC target triplet: apple-ppc-darwin
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17955
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug tree-optimization/17955] Perform associative optimization when it is safe 2004-10-12 20:38 [Bug tree-optimization/17955] New: Perform associative optimization when it is safe fjahanian at apple dot com @ 2004-10-13 13:43 ` pinskia at gcc dot gnu dot org 2005-07-26 13:14 ` dberlin at gcc dot gnu dot org 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-10-13 13:43 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-13 13:43 ------- Confirmed. -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed| |1 Keywords| |missed-optimization Last reconfirmed|0000-00-00 00:00:00 |2004-10-13 13:43:28 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17955 ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/17955] Perform associative optimization when it is safe 2004-10-12 20:38 [Bug tree-optimization/17955] New: Perform associative optimization when it is safe fjahanian at apple dot com 2004-10-13 13:43 ` [Bug tree-optimization/17955] " pinskia at gcc dot gnu dot org @ 2005-07-26 13:14 ` dberlin at gcc dot gnu dot org 1 sibling, 0 replies; 3+ messages in thread From: dberlin at gcc dot gnu dot org @ 2005-07-26 13:14 UTC (permalink / raw) To: gcc-bugs -- Bug 17955 depends on bug 21445, which changed state. Bug 21445 Summary: [meta-bug] we need a reassociate pass http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21445 What |Old Value |New Value ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17955 ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2005-07-26 13:14 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2004-10-12 20:38 [Bug tree-optimization/17955] New: Perform associative optimization when it is safe fjahanian at apple dot com 2004-10-13 13:43 ` [Bug tree-optimization/17955] " pinskia at gcc dot gnu dot org 2005-07-26 13:14 ` dberlin at gcc dot gnu dot org
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