gcc/gcc/tree-ssa-dce.c

284 mark_stmt_if_obviously_necessary (tree stmt, bool aggressive)
354       if (! aggressive)
481   bool aggressive = (el ? true : false);
498       if (aggressive)
516 	     PHI node's arguments are always necessary.  In aggressive mode,
528 	  if (aggressive)
830 tree_dce_init (bool aggressive)
834   if (aggressive)
856 tree_dce_done (bool aggressive)
858   if (aggressive)
881    In aggressive mode, control dependences are taken into account, which
886 	  not an issue right now because we only run aggressive DCE
891 perform_tree_ssa_dce (bool aggressive)
895   tree_dce_init (aggressive);
897   if (aggressive)
919   if (aggressive)
932   tree_dce_done (aggressive);
941   perform_tree_ssa_dce (/*aggressive=*/false);
948   perform_tree_ssa_dce (/*aggressive=*/false);
957   perform_tree_ssa_dce (/*aggressive=*/optimize >= 2);