https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104913
Bug ID: 104913
Summary: [OpenMP] Bogus 'unused variable' with 'omp depobj'
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: diagnostic, openmp
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
The following C code shows the warning
foo.c:6:7: warning: unused variable ‘x’ [-Wunused-variable]
6 | int x;
| ^
but the variable is used in 'depend(inout: x)'.
(No warning for the Fortran code, which is fine. Found when looking at
https://github.com/SOLLVE/sollve_vv/pull/493 which then uses obj with
omp_target_memcpy_async.)
-----------------------
#include <omp.h>
void
foo ()
{
int x;
omp_depend_t obj;
#pragma omp depobj(obj) depend(inout: x)
}
-----------------------
subroutine foo
use omp_lib
implicit none
integer :: x
integer(omp_depend_kind) obj
!$omp depobj(obj) depend(inout: x)
end
