https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82707
--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> If the problem is missing unsharing,
Minimal example (with c compiler and -fexceptions):
...
extern void bar (void);
void foo (void)
{
int e[8];
#pragma acc declare create (e)
bar ();
}
...
At eh_opt, we have the map-delete clause in a finally:
...
try
{
.omp_data_arr.2.e = &e;
#pragma omp target oacc_declare map(force_alloc:e [len: 32])
.omp_data_arr.2 = {CLOBBER};
bar ();
goto <D.1959>;
}
finally
{
.omp_data_arr.5.e = &e;
#pragma omp target oacc_declare map(delete:e)
.omp_data_arr.5 = {CLOBBER};
e = {CLOBBER};
}
...
Then at eh, we see that it has been copied:
...
.omp_data_arr.2.e = &e;
#pragma omp target oacc_declare map(force_alloc:e [len: 32])
.omp_data_arr.2 = {CLOBBER};
bar ();
goto <D.1961>;
<D.1961>:
.omp_data_arr.5.e = &e;
#pragma omp target oacc_declare map(delete:e)
.omp_data_arr.5 = {CLOBBER};
e = {CLOBBER};
goto <D.1959>;
<D.1959>:
return;
<D.1960>:
.omp_data_arr.5.e = &e;
#pragma omp target oacc_declare map(delete:e)
.omp_data_arr.5 = {CLOBBER};
e = {CLOBBER};
resx 1
...
The copy is done using gimple_copy. The patch to gimple_copy fixes the ICE by
unsharing the tree parts of GIMPLE_OMP_TARGET (apart from
gimple_omp_target_child_fn, which is a FUNCTION_DECL, which AFAIU can be
shared).
