Correct types of pointers to doacross_num_done

[Hahnfeld]

Summary

This field is defined as kmp_int32, so we should use neither
pointers to kmp_int64 nor 64 bit atomic instructions.
(Found while testing on a Raspberry Pi, 32 bit ARM)

[AndreyChurbanov]

LGTM

openmp/trunk/runtime/src/kmp_csupport.cpp

void __kmpc_doacross_post(ident_t *loc, int gtid, long long *vec) {
   KMP_MB();
   if ((flag & pr_buf->th_doacross_flags[iter_number]) == 0)
     KMP_TEST_THEN_OR32(&pr_buf->th_doacross_flags[iter_number], flag);
   KA_TRACE(20, ("__kmpc_doacross_post() exit: T#%d iter %lld posted\n", gtid,
                 (iter_number << 5) + shft));
 }
 
 void __kmpc_doacross_fini(ident_t *loc, int gtid) {
-  kmp_int64 num_done;
+  kmp_int32 num_done;
   kmp_info_t *th = __kmp_threads[gtid];
   kmp_team_t *team = th->th.th_team;
   kmp_disp_t *pr_buf = th->th.th_dispatch;
 
   KA_TRACE(20, ("__kmpc_doacross_fini() enter: called T#%d\n", gtid));
   if (team->t.t_serialized) {
     KA_TRACE(20, ("__kmpc_doacross_fini() exit: serialized team %p\n", team));
     return; // nothing to do
   }
-  num_done = KMP_TEST_THEN_INC64((kmp_int64 *)pr_buf->th_doacross_info[1]) + 1;
+  num_done = KMP_TEST_THEN_INC32((kmp_int32 *)pr_buf->th_doacross_info[1]) + 1;
   if (num_done == th->th.th_team_nproc) {
     // we are the last thread, need to free shared resources
     int idx = pr_buf->th_doacross_buf_idx - 1;
     dispatch_shared_info_t *sh_buf =
         &team->t.t_disp_buffer[idx % __kmp_dispatch_num_buffers];
     KMP_DEBUG_ASSERT(pr_buf->th_doacross_info[1] ==
                      (kmp_int64)&sh_buf->doacross_num_done);
-    KMP_DEBUG_ASSERT(num_done == (kmp_int64)sh_buf->doacross_num_done);
+    KMP_DEBUG_ASSERT(num_done == sh_buf->doacross_num_done);
     KMP_DEBUG_ASSERT(idx == sh_buf->doacross_buf_idx);
     __kmp_thread_free(th, CCAST(kmp_uint32 *, sh_buf->doacross_flags));
     sh_buf->doacross_flags = NULL;
     sh_buf->doacross_num_done = 0;
     sh_buf->doacross_buf_idx +=
         __kmp_dispatch_num_buffers; // free buffer for future re-use
   }
   // free private resources (need to keep buffer index forever)
   __kmp_thread_free(th, (void *)pr_buf->th_doacross_info);
   pr_buf->th_doacross_info = NULL;
   KA_TRACE(20, ("__kmpc_doacross_fini() exit: T#%d\n", gtid));
 }
 #endif
 
 // end of file //