- changed_p = modify_bb_reg_pav (bb, e->src, changed_p);
- if (changed_p)
- FOR_EACH_EDGE (e, ei, bb->succs)
- {
- succ = e->dest;
- if (succ->index != EXIT_BLOCK && !TEST_BIT (wset, succ->index))
- {
- SET_BIT (wset, succ->index);
- VARRAY_PUSH_BB (new_bbs, succ);
- }
- }
+ {
+ basic_block pred = e->src;
+
+ if (pred->index != ENTRY_BLOCK)
+ bitmap_ior_into (bb_live_pavin, BB_INFO (pred)->live_pavout);
+ }
+ bitmap_and_into (bb_live_pavin, bb->global_live_at_start);
+ bitmap_ior_and_compl (temp_bitmap, bb_info->avloc,
+ bb_live_pavin, bb_info->killed);
+ bitmap_and_into (temp_bitmap, bb->global_live_at_end);
+ if (! bitmap_equal_p (temp_bitmap, bb_live_pavout))
+ {
+ bitmap_copy (bb_live_pavout, temp_bitmap);
+ FOR_EACH_EDGE (e, ei, bb->succs)
+ {
+ succ = e->dest;
+ if (succ->index != EXIT_BLOCK
+ && !TEST_BIT (wset, succ->index))
+ {
+ SET_BIT (wset, succ->index);
+ VARRAY_PUSH_BB (new_bbs, succ);
+ }
+ }
+ }