Merge, from CGTUNE branch, r1774:

Vex-side changes to allow tools to provide a final_tidy function which
they can use to mess with the final post-tree-built IR before it is
handed off to instruction selection.



git-svn-id: svn://svn.valgrind.org/vex/trunk@1782 8f6e269a-dfd6-0310-a8e1-e2731360e62c
2 files changed