------- Comment #1 from burnus at gcc dot gnu dot org 2010-07-29 14:44 -------
Carry over the comment from PR 45125, where I had posted it initially (and
accidentally).
The segfault occurs for:
l.4768 gfc_add_modify (&lse.post, GFC_DECL_SPAN(decl), tmp);
It seems as if GFC_DECL_SPAN(decl) access a NULL pointer. That's
decl->decl_common.lang_specific->span
where lang_specific == NULL.
While the dump has:
tf_ad_splitting_driver_plane ()
{
extern integer(kind=8) span.0 = 0;
[...]
span.0 = 4;
the "span" variable does not really exist globally but is only created when
needed, cf.
http://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/fortran/trans-decl.c;hb=HEAD#l1243
gfc_get_symbol_decl:
1243 else if (sym->attr.subref_array_pointer)
1245 /* We need the span for these beasts. */
1246 gfc_allocate_lang_decl (decl);
1249 if (sym->attr.subref_array_pointer)
1261 GFC_DECL_SPAN (decl) = span;
If one now recycles the definition for the array descriptor "desc" this
information is not present. I think the real solution is the new array
descriptor. I do not know how to fix this otherwise - except by always
generating a span variable.
Paul - any progress from the array-descriptor front?
--
burnus at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pault at gcc dot gnu dot org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |ice-on-valid-code
Last reconfirmed|0000-00-00 00:00:00 |2010-07-29 14:44:16
date| |
Summary|Segmentation fault with - |Segmentation fault with -
|fwhole-file |fwhole-file for
| |subref_array_pointer
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45128
