GET_OH_BG_PTR     167 gc/backgraph.c     ptr_t q = GET_OH_BG_PTR(p); \
GET_OH_BG_PTR     189 gc/backgraph.c   ptr_t old_back_ptr = GET_OH_BG_PTR(p);
GET_OH_BG_PTR     211 gc/backgraph.c     ptr_t old_back_ptr = GET_OH_BG_PTR(q);
GET_OH_BG_PTR     236 gc/backgraph.c     old_back_ptr = GET_OH_BG_PTR(q);
GET_OH_BG_PTR     282 gc/backgraph.c     ptr_t old_back_ptr = GET_OH_BG_PTR(p);
GET_OH_BG_PTR     348 gc/backgraph.c   ptr_t back_ptr = GET_OH_BG_PTR(p);
GET_OH_BG_PTR     370 gc/backgraph.c     if (GC_is_marked(q) && !(FLAG_MANY & (word)GET_OH_BG_PTR(p))) {
GET_OH_BG_PTR     407 gc/backgraph.c     back_ptr = GET_OH_BG_PTR(p);
GET_OH_BG_PTR     427 gc/backgraph.c     	  back_ptr = GET_OH_BG_PTR(p);