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* [Bug c/14036] New: tree-ssa gcc ICEs on redeclaration of local externs to global declaration
@ 2004-02-05 23:25 fjahanian at apple dot com
2004-02-06 0:03 ` [Bug c/14036] [tree-ssa] [unit-at-a-time] " pinskia at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: fjahanian at apple dot com @ 2004-02-05 23:25 UTC (permalink / raw)
To: gcc-bugs
Following test case ICEs on tree-ssa gcc with -O2. A possible patch is attached. With this patch.
gap program of the SPEC benchmark compiles with -O3 and IMI (which uncovered this bug).
I have not run any other tests at this time.
void first ( )
{
extern char In;
}
void second ()
{
extern char In;
}
char In;
mygccf5 -O2 -c gap.c
gap.c: In function `first':
gap.c:2: internal compiler error: in expand_var, at expr.c:6240
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
And here is my proposed patch:
Index: c-decl.c
============================================================
=======
RCS file: /cvs/gcc/gcc/gcc/c-decl.c,v
retrieving revision 1.334.2.79
diff -c -p -r1.334.2.79 c-decl.c
*** c-decl.c 30 Jan 2004 13:13:31 -0000 1.334.2.79
--- c-decl.c 5 Feb 2004 23:23:22 -0000
*************** pushdecl (tree x)
*** 1712,1717 ****
--- 1731,1738 ----
break;
}
}
+ else
+ old = copy_node (old);
return old;
}
if (DECL_EXTERNAL (x) || scope == global_scope)
--
Summary: tree-ssa gcc ICEs on redeclaration of local externs to
global declaration
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 build triplet: gcc -c -O2 gap.c
GCC host triplet: ppc apple darwin
GCC target triplet: ppc apple darwin
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14036
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/14036] [tree-ssa] [unit-at-a-time] gcc ICEs on redeclaration of local externs to global declaration
2004-02-05 23:25 [Bug c/14036] New: tree-ssa gcc ICEs on redeclaration of local externs to global declaration fjahanian at apple dot com
@ 2004-02-06 0:03 ` pinskia at gcc dot gnu dot org
2004-02-09 22:27 ` fjahanian at apple dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-02-06 0:03 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-02-06 00:03 -------
Confirmed, I almost think this was an side effect of Zack's rewrite to c-decl.c. Also only -funit-at-a-
time is needed to get the ICE.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |zack at gcc dot gnu dot org,
| |pinskia at gcc dot gnu dot
| |org, hubicka at gcc dot gnu
| |dot org
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
GCC build triplet|gcc -c -O2 gap.c |
GCC host triplet|ppc apple darwin |
GCC target triplet|ppc apple darwin |
Keywords| |ice-on-valid-code
Known to fail| |tree-ssa
Known to work| |3.4.0 3.5.0
Last reconfirmed|0000-00-00 00:00:00 |2004-02-06 00:03:53
date| |
Summary|tree-ssa gcc ICEs on |[tree-ssa] [unit-at-a-time]
|redeclaration of local |gcc ICEs on redeclaration of
|externs to global |local externs to global
|declaration |declaration
Target Milestone|--- |tree-ssa
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14036
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/14036] [tree-ssa] [unit-at-a-time] gcc ICEs on redeclaration of local externs to global declaration
2004-02-05 23:25 [Bug c/14036] New: tree-ssa gcc ICEs on redeclaration of local externs to global declaration fjahanian at apple dot com
2004-02-06 0:03 ` [Bug c/14036] [tree-ssa] [unit-at-a-time] " pinskia at gcc dot gnu dot org
@ 2004-02-09 22:27 ` fjahanian at apple dot com
2004-03-10 16:50 ` pinskia at gcc dot gnu dot org
2004-03-10 16:54 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: fjahanian at apple dot com @ 2004-02-09 22:27 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=14036
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/14036] [tree-ssa] [unit-at-a-time] gcc ICEs on redeclaration of local externs to global declaration
2004-02-05 23:25 [Bug c/14036] New: tree-ssa gcc ICEs on redeclaration of local externs to global declaration fjahanian at apple dot com
2004-02-06 0:03 ` [Bug c/14036] [tree-ssa] [unit-at-a-time] " pinskia at gcc dot gnu dot org
2004-02-09 22:27 ` fjahanian at apple dot com
@ 2004-03-10 16:50 ` pinskia at gcc dot gnu dot org
2004-03-10 16:54 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-03-10 16:50 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-03-10 16:50 -------
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=14036
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/14036] [tree-ssa] [unit-at-a-time] gcc ICEs on redeclaration of local externs to global declaration
2004-02-05 23:25 [Bug c/14036] New: tree-ssa gcc ICEs on redeclaration of local externs to global declaration fjahanian at apple dot com
` (2 preceding siblings ...)
2004-03-10 16:50 ` pinskia at gcc dot gnu dot org
@ 2004-03-10 16:54 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ 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 -------
Since my analysis applies to why this one fails is the same as PR 14065 so closing this
as a dup.
*** This bug has been marked as a duplicate of 14065 ***
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14036
^ permalink raw reply [flat|nested] 5+ messages in thread
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2004-02-05 23:25 [Bug c/14036] New: tree-ssa gcc ICEs on redeclaration of local externs to global declaration fjahanian at apple dot com
2004-02-06 0:03 ` [Bug c/14036] [tree-ssa] [unit-at-a-time] " pinskia at gcc dot gnu dot org
2004-02-09 22:27 ` fjahanian at apple dot com
2004-03-10 16:50 ` pinskia at gcc dot gnu dot org
2004-03-10 16:54 ` pinskia at gcc dot gnu dot org
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