tree-ssa-dom.c (stmts_to_rescan): Move from a block-local varray to a global varray.

tree-ssa-dom.c (stmts_to_rescan): Move from a block-local varray to a global varray.

        * tree-ssa-dom.c (stmts_to_rescan): Move from a block-local varray
        to a global varray.
        (tree_ssa_dominator_optimize): Allocate stmts_to_rescan.
        (dom_opt_initialize_block_local_data): No longer test stmts_to_rescan's
        state.
        (dom_opt_finalize_block): Update due to change in scope of
        stmts_to_rescan.
        (optimize_stmt): Similarly.

From-SVN: r87494