2013-09-06 Richard Biener <rguenther@suse.de>
* basic-block.h (class control_dependences): New.
* tree-ssa-dce.c (control_dependence_map): Remove.
(cd): New global.
(EXECUTE_IF_CONTROL_DEPENDENT): Remove.
(set_control_dependence_map_bit, clear_control_dependence_bitmap,
find_pdom, find_control_dependence, find_all_control_dependences):
Move to cfganal.c.
(mark_control_dependent_edges_necessary, find_obviously_necessary_stmts,
propagate_necessity, tree_dce_init, tree_dce_done,
perform_tree_ssa_dce): Adjust.
* cfganal.c (set_control_dependence_map_bit,
clear_control_dependence_bitmap, find_pdom, find_control_dependence,
find_all_control_dependences): Move from tree-ssa-dce.c and
implement as methods of control_dependences class.
(control_dependences::control_dependences): New.
(control_dependences::~control_dependences): Likewise.
(control_dependences::get_edges_dependent_on): Likewise.
(control_dependences::get_edge): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@202309 138bc75d-0d04-0410-961f-82ee72b054a4