Summary: Use replace_node() method instead of subsume_node().
Reviewed-by: jrose, never

Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

Reviewed-by: kvn

Summary: Loop predication implementation
Reviewed-by: never, kvn

Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never