diff options
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 931f1b5..5b1b8a1 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -2813,27 +2813,29 @@ vect_is_simple_reduction (loop_vec_info loop_info, gimple *phi, return NULL; } + if (! flow_bb_inside_loop_p (loop, gimple_bb (def_stmt))) + return NULL; + nloop_uses = 0; auto_vec<gphi *, 3> lcphis; - if (flow_bb_inside_loop_p (loop, gimple_bb (def_stmt))) - FOR_EACH_IMM_USE_FAST (use_p, imm_iter, name) - { - gimple *use_stmt = USE_STMT (use_p); - if (is_gimple_debug (use_stmt)) - continue; - if (flow_bb_inside_loop_p (loop, gimple_bb (use_stmt))) - nloop_uses++; - else - /* We can have more than one loop-closed PHI. */ - lcphis.safe_push (as_a <gphi *> (use_stmt)); - if (nloop_uses > 1) - { - if (dump_enabled_p ()) - dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, - "reduction used in loop.\n"); - return NULL; - } - } + FOR_EACH_IMM_USE_FAST (use_p, imm_iter, name) + { + gimple *use_stmt = USE_STMT (use_p); + if (is_gimple_debug (use_stmt)) + continue; + if (flow_bb_inside_loop_p (loop, gimple_bb (use_stmt))) + nloop_uses++; + else + /* We can have more than one loop-closed PHI. */ + lcphis.safe_push (as_a <gphi *> (use_stmt)); + if (nloop_uses > 1) + { + if (dump_enabled_p ()) + dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, + "reduction used in loop.\n"); + return NULL; + } + } /* If DEF_STMT is a phi node itself, we expect it to have a single argument defined in the inner loop. */ |