https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113867
--- Comment #5 from Tobias Burnus <burnus at gcc dot gnu.org> ---
For:
int *q;
#pragma omp target device(y5) map(q, q[:5])
GCC currently generates:
map(tofrom:q [len: 8]) map(tofrom:*q.4_1 [len: 20]) map(attach:q [bias: 0])
Expected:
'alloc:' instead of 'attach:'
or even:
map(tofrom:*q [len: 20]) map(firstprivate:q [pointer assign, bias: 0])
In any case, the first 'tofrom' is pointless!
NOTE: GCC 13 shows:
error: 'q' appears both in data and map clauses
* * *
For
#pragma omp target map(s.p[:5])
GCC should do:
map(tofrom:s [len: 24][implicit]) map(tofrom:*_5 [len: 16])
map(attach:s.p [bias: 0])
But (regression!) it does:
map(struct:s [len: 1]) map(alloc:s.p [len: 8]) map(tofrom:*_5 [len: 16])
map(attach:s.p [bias: 0])
Solution:
--- a/gcc/gimplify.cc
+++ b/gcc/gimplify.cc
@@ -12381,3 +12381,4 @@ gimplify_scan_omp_clauses (tree *list_p, gimple_seq
*pre_p,
if (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH
- || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_DETACH)
+ || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_DETACH
+ || OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH_DETACH)
break;
However, unless I messed up, this will cause tons of ICE(segfault).
