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* [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined
@ 2004-02-07 19:13 fjahanian at apple dot com
2004-02-07 19:17 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] " pinskia at gcc dot gnu dot org
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: fjahanian at apple dot com @ 2004-02-07 19:13 UTC (permalink / raw)
To: gcc-bugs
This bug was also uncovered building gap of the spec benchmark with tree-ssa. In the
following trivial test case, tree-ssa gcc produces two definition of the locally declaraed extern
which is later defined. Compile with -O2.
/* Bug in tree-ssa, tested on Apple, darwin, ppc. Compile with O2:
mygcct5o -O2 prxxx.c
/var/tmp//ccZZXOy5.s:8:FATAL:Symbol _CPN already defined.
*/
void collect()
{
extern long CPN;
}
long CPN=1;
--
Summary: tree-ssa generates duplicate definision of invisible
sybmbol forward defined
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: fjahanian at apple dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: powerpc-apple-darwin7.0.0
GCC target triplet: powerpc-apple-darwin7.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definision of invisible sybmbol forward defined
2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
@ 2004-02-07 19:17 ` pinskia at gcc dot gnu dot org
2004-02-07 19:23 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-02-07 19:17 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-02-07 19:17 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org, hubicka at gcc dot gnu
| |dot org
Severity|normal |critical
Status|UNCONFIRMED |NEW
Component|c |optimization
Ever Confirmed| |1
Keywords| |wrong-code
Known to fail| |tree-ssa
Known to work| |3.5.0
Priority|P2 |P1
Last reconfirmed|0000-00-00 00:00:00 |2004-02-07 19:17:34
date| |
Summary|tree-ssa generates duplicate|[tree-ssa] [unit-at-a-time]
|definision of invisible |generates duplicate
|sybmbol forward defined |definision of invisible
| |sybmbol forward defined
Target Milestone|--- |tree-ssa
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definision of invisible sybmbol forward defined
2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
2004-02-07 19:17 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] " pinskia at gcc dot gnu dot org
@ 2004-02-07 19:23 ` pinskia at gcc dot gnu dot org
2004-02-09 22:30 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition " fjahanian at apple dot com
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-02-07 19:23 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-02-07 19:23 -------
Okay some analysis of the bug. When in not unit-at-a-time mode, the symbol CPN is not put in the
function scope while with it is.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible sybmbol forward defined
2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
2004-02-07 19:17 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] " pinskia at gcc dot gnu dot org
2004-02-07 19:23 ` pinskia at gcc dot gnu dot org
@ 2004-02-09 22:30 ` fjahanian at apple dot com
2004-03-02 18:31 ` dnovillo at gcc dot gnu dot org
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: fjahanian at apple dot com @ 2004-02-09 22:30 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |zack at codesourcery dot com
|dot org |
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible sybmbol forward defined
2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
` (2 preceding siblings ...)
2004-02-09 22:30 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition " fjahanian at apple dot com
@ 2004-03-02 18:31 ` dnovillo at gcc dot gnu dot org
2004-03-10 16:54 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible symbol forward declared pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: dnovillo at gcc dot gnu dot org @ 2004-03-02 18:31 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dnovillo at gcc dot gnu dot org 2004-03-02 18:31 -------
I've looked at it briefly. Found that merge_decls was doing something odd, but
Zack mentioned on IRC that the fix implies changing a few data structures around.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |dnovillo at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible symbol forward declared
2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
` (3 preceding siblings ...)
2004-03-02 18:31 ` dnovillo at gcc dot gnu dot org
@ 2004-03-10 16:54 ` pinskia at gcc dot gnu dot org
2004-03-10 16:55 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-03-10 16:54 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-03-10 16:54 -------
*** Bug 14036 has been marked as a duplicate of this bug. ***
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible symbol forward declared
2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
` (4 preceding siblings ...)
2004-03-10 16:54 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible symbol forward declared pinskia at gcc dot gnu dot org
@ 2004-03-10 16:55 ` pinskia at gcc dot gnu dot org
2004-03-16 19:10 ` pinskia at gcc dot gnu dot org
2004-03-27 20:34 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-03-10 16:55 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-03-10 16:55 -------
The problem is that when converting from generic to gimple, the variable goes from
extern to static for some reason.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible symbol forward declared
2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
` (5 preceding siblings ...)
2004-03-10 16:55 ` pinskia at gcc dot gnu dot org
@ 2004-03-16 19:10 ` pinskia at gcc dot gnu dot org
2004-03-27 20:34 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-03-16 19:10 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|critical |normal
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible symbol forward declared
2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
` (6 preceding siblings ...)
2004-03-16 19:10 ` pinskia at gcc dot gnu dot org
@ 2004-03-27 20:34 ` pinskia at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-03-27 20:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-03-27 20:34 -------
This was fixed by Zack's rewrite of c-decl.c so closing.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14065
^ permalink raw reply [flat|nested] 9+ messages in thread
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2004-02-07 19:13 [Bug c/14065] New: tree-ssa generates duplicate definision of invisible sybmbol forward defined fjahanian at apple dot com
2004-02-07 19:17 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] " pinskia at gcc dot gnu dot org
2004-02-07 19:23 ` pinskia at gcc dot gnu dot org
2004-02-09 22:30 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition " fjahanian at apple dot com
2004-03-02 18:31 ` dnovillo at gcc dot gnu dot org
2004-03-10 16:54 ` [Bug optimization/14065] [tree-ssa] [unit-at-a-time] generates duplicate definition of invisible symbol forward declared pinskia at gcc dot gnu dot org
2004-03-10 16:55 ` pinskia at gcc dot gnu dot org
2004-03-16 19:10 ` pinskia at gcc dot gnu dot org
2004-03-27 20:34 ` pinskia at gcc dot gnu dot org
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