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* [Bug optimization/13343] New: [tree-ssa] self-pointing pointers are sometimes miscompiled
@ 2003-12-07 18:37 jim at phython dot shacknet dot nu
2003-12-07 18:39 ` [Bug optimization/13343] " jim at phython dot shacknet dot nu
2003-12-07 19:18 ` falk at debian dot org
0 siblings, 2 replies; 3+ messages in thread
From: jim at phython dot shacknet dot nu @ 2003-12-07 18:37 UTC (permalink / raw)
To: gcc-bugs
In the attached testcase v3 points to itself and is then assigned the value 123.
However, foo gets inlined at the rtl level in O1 or at the tree level in O2 and
causes the return value to be 20, on my machine, instead of 123 as is expected and
is returned on gcc 3.3 with and without optimizations.
--
Summary: [tree-ssa] self-pointing pointers are sometimes
miscompiled
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jim at phython dot shacknet dot nu
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: sparc-unknown-linux-gnu
GCC host triplet: sparc-unknown-linux-gnu
GCC target triplet: sparc-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13343
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug optimization/13343] [tree-ssa] self-pointing pointers are sometimes miscompiled
2003-12-07 18:37 [Bug optimization/13343] New: [tree-ssa] self-pointing pointers are sometimes miscompiled jim at phython dot shacknet dot nu
@ 2003-12-07 18:39 ` jim at phython dot shacknet dot nu
2003-12-07 19:18 ` falk at debian dot org
1 sibling, 0 replies; 3+ messages in thread
From: jim at phython dot shacknet dot nu @ 2003-12-07 18:39 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From jim at phython dot shacknet dot nu 2003-12-07 18:39 -------
Created an attachment (id=5294)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5294&action=view)
testcase for self-pointing pointer
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13343
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug optimization/13343] [tree-ssa] self-pointing pointers are sometimes miscompiled
2003-12-07 18:37 [Bug optimization/13343] New: [tree-ssa] self-pointing pointers are sometimes miscompiled jim at phython dot shacknet dot nu
2003-12-07 18:39 ` [Bug optimization/13343] " jim at phython dot shacknet dot nu
@ 2003-12-07 19:18 ` falk at debian dot org
1 sibling, 0 replies; 3+ messages in thread
From: falk at debian dot org @ 2003-12-07 19:18 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From falk at debian dot org 2003-12-07 19:18 -------
This is an aliasing violation; your test case is invalid.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13343
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2003-12-07 19:18 UTC | newest]
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2003-12-07 18:37 [Bug optimization/13343] New: [tree-ssa] self-pointing pointers are sometimes miscompiled jim at phython dot shacknet dot nu
2003-12-07 18:39 ` [Bug optimization/13343] " jim at phython dot shacknet dot nu
2003-12-07 19:18 ` falk at debian dot org
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