Reviewed-by: kvn, rasbold

Summary: Push DecodeN node below the Null check to the non-null path to use the mach node without 0 test.
Reviewed-by: rasbold, never

Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

Reviewed-by: kvn, jrose

Summary: verify the adr_type of a mach node was not changed
Reviewed-by: rasbold, never

Summary: Generate addresses and implicit null checks with narrow oops to avoid decoding.
Reviewed-by: jrose, never