[Bug c/31537] New: duplicate weakref emitted with IMA

[aldot at gcc dot gnu dot org]

$ /scratch/obj.i686/gcc-4.3/./gcc/xgcc -B/scratch/obj.i686/gcc-4.3/./gcc/
-B/opt/i686/gcc-4.3//i686-linux-gnu/bin/
-B/opt/i686/gcc-4.3//i686-linux-gnu/lib/ -c f?.i -combine -o /dev/null 
/tmp/ccqmLD9J.s: Assembler messages:
/tmp/ccqmLD9J.s:3: Error: symbol `__gthrw_pthread_once' is already defined


$ cat f1.i
static __gthrw_pthread_once __attribute__ ((__weakref__ ("pthread_once")));
$ cat f2.i
static __gthrw_pthread_once __attribute__ ((__weakref__ ("pthread_once")));


It fails to drop duplicate weakrefs:
$ /scratch/obj.i686/gcc-4.3/./gcc/xgcc -B/scratch/obj.i686/gcc-4.3/./gcc/
-B/opt/i686/gcc-4.3//i686-linux-gnu/bin/
-B/opt/i686/gcc-4.3//i686-linux-gnu/lib/ -S f?.i -combine -o -
        .file   "f1.i"
        .weakref        __gthrw_pthread_once,pthread_once
        .weakref        __gthrw_pthread_once,pthread_once
        .ident  "GCC: (GNU) 4.3.0 20070410 (experimental)"
        .section        .note.GNU-stack,"",@progbits


-- 
           Summary: duplicate weakref emitted with IMA
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: assemble-failure
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aldot at gcc dot gnu dot org
 GCC build triplet: i686-linux-gnu
  GCC host triplet: i686-linux-gnu
GCC target triplet: i686-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31537