Jakob Stoklund Olesen f41b1697fe Add support for partial redefs to the fast register allocator.
A partial redef now triggers a reload if required. Also don't add
<imp-def,dead> operands for physical superregisters.

Kill flags are still treated as full register kills, and <imp-use,kill> operands
are added for physical superregisters as before.

llvm-svn: 104167
2010-05-19 21:36:05 +00:00
..
2010-05-18 23:55:57 +00:00