https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102043
Mikael Morin <mikael at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |mikael at gcc dot gnu.org
--- Comment #8 from Mikael Morin <mikael at gcc dot gnu.org> ---
It comes from gfc_conv_expr_descriptor:
/* Point the data pointer at the 1st element in the section. */
gfc_get_dataptr_offset (&loop.pre, parm, desc, base,
subref_array_target, expr);
where base has been calculated as the index of the first element.
I’ve tried doing a mere "if (forward) start else end" in the calculation of
base, but then I needed to add an offset (i.e. array index offset) to vector
subscript accesses, and then a delta was missing (i.e. loop index offset) as
the descriptor is one-based, but I don’t know how to fix the latter without
impacting all the vector subscript handling which seems to rely on quite a few
assumptions (no delta, no offset, zero-based loop?, forward loop?).
