------- Comment #8 from jakub at gcc dot gnu dot org 2010-07-15 20:20 -------
Ah, so -fdump-tree-optimized dump doesn't reveal the problem, but
-fdump-tree-optimized-all actually does. The problem is that each routine -
char_array_structure_constructor and alloc, use different decls for the same
global variable, in my case __global_MOD_cD.1531 and __global_MOD_cD.1555.
When alloc is inlined into char_array_structure_constructor, this means
the same global var is accessed through 2 different aliases, and then
scheduling actually happens to reorder the store of the malloc result stored to
one of these c variables' data field with the read from the other c variable's
data field.
The DECL_PURE_P change just uncovered this latent issue, wonder why it hasn't
been seen earlier. Guess Fortran code isn't inlined too much, with the
exception of contained functions.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44945
