2011-11-15 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/51005
* tree-ssa-tail-merge.c (delete_basic_block_same_succ): Rename to
mark_basic_block_deleted.
(update_worklist): Inline purge_bbs.
(purge_bbs, unlink_virtual_phi, update_vuses, vop_at_entry)
(delete_block_update_dominator_info): Remove.
(replace_block_by): Remove update_vops parameter. Partially evaluate
for update_vops == false.
(apply_clusters): Remove update_vops parameter. Remove update_vops
argument in replace_block_by call.
(update_debug_stmts): Remove MAY_HAVE_DEBUG_STMTS test.
(tail_merge_optimize): Remove update_vops argument to apply_clusters.
Remove call to purge_bbs. Add calls to calculate_dominance_info and
free_dominance_info. Add MAY_HAVE_DEBUG_STMTS before calling
update_debug_stmts. Mark vop var for renaming, if necessary.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@181372 138bc75d-0d04-0410-961f-82ee72b054a4