Jakob Stoklund Olesen e0eddb21f5 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

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