* store-motion.c: Many cleanups to make this pass a first-class
citizen instead of an appendix to gcse load motion. Add TODO list
to make this pass faster/cleaner/better.
(struct ls_expr): Post gcse.c-split cleanups.
Rename to st_expr. Rename "loads" field to "antic_stores". Rename
"stores" field to "avail_stores".
(pre_ldst_mems): Rename to store_motion_mems.
(pre_ldst_table): Rename to store_motion_mems_table.
(pre_ldst_expr_hash): Rename to pre_st_expr_hash, update users.
(pre_ldst_expr_eq): Rename to pre_st_expr_eq, update users.
(ldst_entry): Rename to st_expr_entry, update users.
(free_ldst_entry): Rename to free_st_expr_entry, update users.
(free_ldst_mems): Rename to free_store_motion_mems, update users.
(enumerate_ldsts): Rename to enumerate_store_motion_mems, update caller.
(first_ls_expr): Rename to first_st_expr, update users.
(next_ls_expr): Rename to next_st_expr, update users.
(print_ldst_list): Rename to print_store_motion_mems. Print names of
fields properly for store motion instead of names inherited from load
motion in gcse.c.
(ANTIC_STORE_LIST, AVAIL_STORE_LIST): Remove.
(LAST_AVAIL_CHECK_FAILURE): Explain what this is. Undefine when we
are done with it.
(ae_kill): Rename to st_kill, update users.
(ae_gen): Rename to st_avloc, update users.
(transp): Rename to st_transp, update users.
(pre_insert_map): Rename to st_insert_map, update users.
(pre_delete_map): Rename to st_delete_map, update users.
(insert_store, build_store_vectors, free_store_memory,
one_store_motion_pass): Update for abovementioned changes.
(gcse_subst_count, gcse_create_count): Remove.
(one_store_motion_pass): New statistics counters "n_stores_deleted"
and "n_stores_created", local variables.
(extract_mentioned_regs, extract_mentioned_regs_1): Rewrite to
use for_each_rtx.
(regvec, compute_store_table_current_insn): Remove.
(reg_set_info, reg_clear_last_set): Remove.
(compute_store_table): Use DF caches instead of local dataflow
solvers.
From-SVN: r147034
