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* [Bug lto/46940] New: asm aliases with linker plugin segfaults
@ 2010-12-14 15:35 hubicka at gcc dot gnu.org
2010-12-14 16:21 ` [Bug lto/46940] " hubicka at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: hubicka at gcc dot gnu.org @ 2010-12-14 15:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46940
Summary: asm aliases with linker plugin segfaults
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: hubicka@gcc.gnu.org
extern __attribute__((visibility("hidden"))) void _moz_foo (void);
extern __typeof (_moz_foo) _moz_foo __asm__ ("" "INT__foo")
__attribute__((__visibility__("hidden"))) ;
void _moz_foo(void)
{
printf ("blah\n");
}
extern __typeof (_moz_foo) EXT__foo __asm__("" "_moz_foo")
__attribute__((__alias__("" "INT__foo")));
evans:/abuild/jh/trunk-3/build-inst2/gcc/:[0]# more t2.c
extern void _moz_foo (void);
main()
{
_moz_foo ();
}
evans:/abuild/jh/trunk-3/build-inst2/gcc/:[0]# ./xgcc -B ./ -O2 -flto t.c t2.c
-fuse-linker-plugin
t.c: In function ?_moz_foo?:
t.c:5:3: warning: incompatible implicit declaration of built-in function
?printf? [enabled by default]
lto1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper: ./xgcc returned 1 exit status
lto-wrapper failedcollect2: ld returned 1 exit status
The problem here is that we get prevailing definition of _moz_foo to be alias
that has no cgraph node (nor alias node) attached. Bah.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug lto/46940] asm aliases with linker plugin segfaults
2010-12-14 15:35 [Bug lto/46940] New: asm aliases with linker plugin segfaults hubicka at gcc dot gnu.org
@ 2010-12-14 16:21 ` hubicka at gcc dot gnu.org
2010-12-14 23:22 ` hubicka at gcc dot gnu.org
2010-12-14 23:23 ` hubicka at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: hubicka at gcc dot gnu.org @ 2010-12-14 16:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46940
Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2010.12.14 16:20:51
Blocks|45375 |
Ever Confirmed|0 |1
--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> 2010-12-14 16:20:51 UTC ---
testing patch...
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug lto/46940] asm aliases with linker plugin segfaults
2010-12-14 15:35 [Bug lto/46940] New: asm aliases with linker plugin segfaults hubicka at gcc dot gnu.org
2010-12-14 16:21 ` [Bug lto/46940] " hubicka at gcc dot gnu.org
@ 2010-12-14 23:22 ` hubicka at gcc dot gnu.org
2010-12-14 23:23 ` hubicka at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: hubicka at gcc dot gnu.org @ 2010-12-14 23:22 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46940
--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> 2010-12-14 23:22:27 UTC ---
Author: hubicka
Date: Tue Dec 14 23:22:23 2010
New Revision: 167822
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=167822
Log:
PR lto/46940
PR lto/44463
* lto-symtab.c (lto_symtab_merge_cgraph_nodes_1): Construct nodes
for aliases when they are used.
* gcc.dg/lto/pr46940_0.c: New testcase.
* gcc.dg/lto/pr46940_1.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/lto/pr46940_0.c
trunk/gcc/testsuite/gcc.dg/lto/pr46940_1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lto-symtab.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug lto/46940] asm aliases with linker plugin segfaults
2010-12-14 15:35 [Bug lto/46940] New: asm aliases with linker plugin segfaults hubicka at gcc dot gnu.org
2010-12-14 16:21 ` [Bug lto/46940] " hubicka at gcc dot gnu.org
2010-12-14 23:22 ` hubicka at gcc dot gnu.org
@ 2010-12-14 23:23 ` hubicka at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: hubicka at gcc dot gnu.org @ 2010-12-14 23:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46940
Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> 2010-12-14 23:23:11 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2010-12-14 15:35 [Bug lto/46940] New: asm aliases with linker plugin segfaults hubicka at gcc dot gnu.org
2010-12-14 16:21 ` [Bug lto/46940] " hubicka at gcc dot gnu.org
2010-12-14 23:22 ` hubicka at gcc dot gnu.org
2010-12-14 23:23 ` hubicka at gcc dot gnu.org
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