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* [Bug optimization/13962] New: [tree-ssa] make "fold" use alias information to optimize pointer comparisons
@ 2004-02-01 18:22 dann at godzilla dot ics dot uci dot edu
2004-02-01 18:31 ` [Bug optimization/13962] " dnovillo at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: dann at godzilla dot ics dot uci dot edu @ 2004-02-01 18:22 UTC (permalink / raw)
To: gcc-bugs
Given 2 pointers p and q, if the alias information says that p and q
cannot alias, then comparisons like p == q and p != q can be optimized away.
There are quite a few examples in:
testsuite/gcc.dg/tree-ssa/ssa-ccp-3.c
--
Summary: [tree-ssa] make "fold" use alias information to optimize
pointer comparisons
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dann at godzilla dot ics dot uci dot edu
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13962
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug optimization/13962] [tree-ssa] make "fold" use alias information to optimize pointer comparisons
2004-02-01 18:22 [Bug optimization/13962] New: [tree-ssa] make "fold" use alias information to optimize pointer comparisons dann at godzilla dot ics dot uci dot edu
@ 2004-02-01 18:31 ` dnovillo at gcc dot gnu dot org
2004-02-04 2:49 ` rth at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: dnovillo at gcc dot gnu dot org @ 2004-02-01 18:31 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dnovillo at gcc dot gnu dot org 2004-02-01 18:31 -------
Mine
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |dnovillo at gcc dot gnu dot
|dot org |org
Status|UNCONFIRMED |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13962
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug optimization/13962] [tree-ssa] make "fold" use alias information to optimize pointer comparisons
2004-02-01 18:22 [Bug optimization/13962] New: [tree-ssa] make "fold" use alias information to optimize pointer comparisons dann at godzilla dot ics dot uci dot edu
2004-02-01 18:31 ` [Bug optimization/13962] " dnovillo at gcc dot gnu dot org
@ 2004-02-04 2:49 ` rth at gcc dot gnu dot org
2004-02-13 3:17 ` pinskia at gcc dot gnu dot org
2004-05-24 15:37 ` [Bug tree-optimization/13962] " pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: rth at gcc dot gnu dot org @ 2004-02-04 2:49 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rth at gcc dot gnu dot org 2004-02-04 02:49 -------
Enhancement request.
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13962
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug optimization/13962] [tree-ssa] make "fold" use alias information to optimize pointer comparisons
2004-02-01 18:22 [Bug optimization/13962] New: [tree-ssa] make "fold" use alias information to optimize pointer comparisons dann at godzilla dot ics dot uci dot edu
2004-02-01 18:31 ` [Bug optimization/13962] " dnovillo at gcc dot gnu dot org
2004-02-04 2:49 ` rth at gcc dot gnu dot org
@ 2004-02-13 3:17 ` pinskia at gcc dot gnu dot org
2004-05-24 15:37 ` [Bug tree-optimization/13962] " pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-02-13 3:17 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |pessimizes-code
Target Milestone|--- |tree-ssa
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13962
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/13962] [tree-ssa] make "fold" use alias information to optimize pointer comparisons
2004-02-01 18:22 [Bug optimization/13962] New: [tree-ssa] make "fold" use alias information to optimize pointer comparisons dann at godzilla dot ics dot uci dot edu
` (2 preceding siblings ...)
2004-02-13 3:17 ` pinskia at gcc dot gnu dot org
@ 2004-05-24 15:37 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-05-24 15:37 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.5.0 |---
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13962
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2004-05-24 1:18 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2004-02-01 18:22 [Bug optimization/13962] New: [tree-ssa] make "fold" use alias information to optimize pointer comparisons dann at godzilla dot ics dot uci dot edu
2004-02-01 18:31 ` [Bug optimization/13962] " dnovillo at gcc dot gnu dot org
2004-02-04 2:49 ` rth at gcc dot gnu dot org
2004-02-13 3:17 ` pinskia at gcc dot gnu dot org
2004-05-24 15:37 ` [Bug tree-optimization/13962] " pinskia at gcc dot gnu dot org
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