[patch] [tuples] enable pass_mark_used_blocks and pass_cleanup_cfg_post_optimizing

[Rafael Espindola]

This is a trivial patch that just enables two passes that happen to
work already.

This fixes 16 tests :-)

Tested on top of my previous patch to port pass_nrv.

2008-02-19  Rafael Espindola  <espindola@google.com>

 * passes.c(init_optimization_passes): Enable pass_mark_used_blocks
and pass_cleanup_cfg_post_optimizing.
 * tree-optimize.c(execute_cleanup_cfg_post_optimizing): call cleanup_tree_cfg.

Cheers,
-- 
Rafael Avila de Espindola

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