https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104696
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|fortran |middle-end
Summary|[OpenMP] Implicit mapping |[OpenMP]
|breaks struct mapping |component/array-ref/compone
| |nt (x.r[1].d) should use
| |'x' for GOMP_MAP_STRUCT
| |(not yield 'x.r[1]' for
| |nonptr 'x.r')
--- Comment #5 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #4)
> #pragma omp target map(tofrom: x.r[1].d)
> *.r[1].d = 3;
s/*/x/
The problem is that in gimplify.cc's gimplify_scan_omp_clauses:
tree base
= extract_base_bit_offset (OMP_CLAUSE_DECL (c), &base_ref,
&bitpos1, &offset1,
&tree_offset1);
bool do_map_struct = (base == decl && !tree_offset1);
Here, 'base' == 'x' but 'decl' is 'x.r[1]' - while for 'x.q.d' it is 'x' (==
base).
The comp refs are removed as follows. (It seems as if some additional ARRAY_REF
checking is needed for non-pointer components.)
else if (TREE_CODE (decl) == COMPONENT_REF
&& (OMP_CLAUSE_MAP_KIND (c)
!= GOMP_MAP_ATTACH_ZERO_LENGTH_ARRAY_SECTION))
{
component_ref_p = true;
while (TREE_CODE (decl) == COMPONENT_REF)
decl = TREE_OPERAND (decl, 0);
if (TREE_CODE (decl) == INDIRECT_REF
&& DECL_P (TREE_OPERAND (decl, 0))
&& (TREE_CODE (TREE_TYPE (TREE_OPERAND (decl, 0)))
== REFERENCE_TYPE))
decl = TREE_OPERAND (decl, 0);
}
Probably the same for '!DECL_P (decl)' in the previous 'if' branch.
