[Bug debug/41357] libgomp build fail

[davek at gcc dot gnu dot org]

------- Comment #10 from davek at gcc dot gnu dot org  2009-09-15 14:24 -------
(In reply to comment #9)
> (In reply to comment #8)
> > (In reply to comment #6)
> > > (In reply to comment #1)
> > > > The cause is that DW_TAG_variable references gomp_tls_data instead of
> > > > ___emutls_v.gomp_tls_data.
> > > > 
> > > 
> > >   Here's an example:
> > 
> >   No, that's not it, that's not it at all, sorry.  Here's the relevant part of
> > the debug info from iter.s in the libgomp build dir, with a bit of surrounding
> > context:
> > 
> >         .ascii "thr\0"
> >         .byte   0x1
> >         .byte   0x92
> >    vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
> >         .long   0xa79
> >         .long   _gomp_tls_data
> >    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Yeah, this is what I found. When var-tracking generates debug_insn, it should
> use ___emutls_v.gomp_tls_data as normal insn is expanded.
> 

  I'm just debugging add_location_or_const_value_attribute() which is where the
value gets added.  Not sure how to export knowledge of tls prefix from varasm.c
yet though.  We could punt on trying to attach a const value to the DIE
altogether, although that seems a shame since it's potentially knowable.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41357