59 struct oacc_loop  struct
61   oacc_loop *parent; /* Containing loop.  */  argument
63   oacc_loop *child; /* First inner loop.  */  argument
65   oacc_loop *sibling; /* Next loop within same parent.  */  argument
67   location_t loc; /* Location of the loop start.  */
69   gcall *marker; /* Initial head marker.  */
71   gcall *heads[GOMP_DIM_MAX];  /* Head marker functions.  */
72   gcall *tails[GOMP_DIM_MAX];  /* Tail marker functions.  */
74   tree routine;  /* Pseudo-loop enclosing a routine.  */
76   unsigned mask;   /* Partitioning mask.  */
77   unsigned e_mask; /* Partitioning of element loops (when tiling).  */
78   unsigned inner;  /* Partitioning of inner loops.  */
79   unsigned flags;  /* Partitioning flags.  */
80   vec<gcall *> ifns;  /* Contained loop abstraction functions.  */
81   tree chunk_size; /* Chunk size.  */
82   gcall *head_end; /* Final marker of head sequence.  */