diff options
Diffstat (limited to 'gcc/cfgloop.c')
| -rw-r--r-- | gcc/cfgloop.c | 45 |
1 files changed, 31 insertions, 14 deletions
diff --git a/gcc/cfgloop.c b/gcc/cfgloop.c index e00e6a62ea4..b168b9792b8 100644 --- a/gcc/cfgloop.c +++ b/gcc/cfgloop.c @@ -251,7 +251,7 @@ mark_single_exit_loops (struct loops *loops) { loop = loops->parray[i]; if (loop) - loop->single_exit = NULL; + set_single_exit (loop, NULL); } FOR_EACH_BB (bb) @@ -273,10 +273,10 @@ mark_single_exit_loops (struct loops *loops) { /* If we have already seen an exit, mark this by the edge that surely does not occur as any exit. */ - if (loop->single_exit) - loop->single_exit = single_succ_edge (ENTRY_BLOCK_PTR); + if (single_exit (loop)) + set_single_exit (loop, single_succ_edge (ENTRY_BLOCK_PTR)); else - loop->single_exit = e; + set_single_exit (loop, e); } } } @@ -287,8 +287,8 @@ mark_single_exit_loops (struct loops *loops) if (!loop) continue; - if (loop->single_exit == single_succ_edge (ENTRY_BLOCK_PTR)) - loop->single_exit = NULL; + if (single_exit (loop) == single_succ_edge (ENTRY_BLOCK_PTR)) + set_single_exit (loop, NULL); } loops->state |= LOOPS_HAVE_MARKED_SINGLE_EXITS; @@ -1142,12 +1142,12 @@ verify_loop_structure (struct loops *loops) loop = loop->outer) { sizes[loop->num]++; - if (loop->single_exit - && loop->single_exit != e) + if (single_exit (loop) + && single_exit (loop) != e) { error ("wrong single exit %d->%d recorded for loop %d", - loop->single_exit->src->index, - loop->single_exit->dest->index, + single_exit (loop)->src->index, + single_exit (loop)->dest->index, loop->num); error ("right exit is %d->%d", e->src->index, e->dest->index); @@ -1164,19 +1164,19 @@ verify_loop_structure (struct loops *loops) continue; if (sizes[i] == 1 - && !loop->single_exit) + && !single_exit (loop)) { error ("single exit not recorded for loop %d", loop->num); err = 1; } if (sizes[i] != 1 - && loop->single_exit) + && single_exit (loop)) { error ("loop %d should not have single exit (%d -> %d)", loop->num, - loop->single_exit->src->index, - loop->single_exit->dest->index); + single_exit (loop)->src->index, + single_exit (loop)->dest->index); err = 1; } } @@ -1216,3 +1216,20 @@ loop_exit_edge_p (const struct loop *loop, edge e) return (flow_bb_inside_loop_p (loop, e->src) && !flow_bb_inside_loop_p (loop, e->dest)); } + +/* Returns the single exit edge of LOOP, or NULL if LOOP has either no exit + or more than one exit. */ + +edge +single_exit (const struct loop *loop) +{ + return loop->single_exit_; +} + +/* Records E as a single exit edge of LOOP. */ + +void +set_single_exit (struct loop *loop, edge e) +{ + loop->single_exit_ = e; +} |