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2 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
9d328484ce Try harder to get the hint by preferring to evict hint interference. 
llvm-svn: 126463
 2011-02-25 01:04:22 +00:00
Jakob Stoklund Olesen
e3924a3c85 Add an AllocationOrder class that can iterate over the allocatable physical 
registers for a given virtual register.

Reserved registers are filtered from the allocation order, and any valid hint is
returned as the first suggestion.

For target dependent hints, a number of arcane target hooks are invoked.

llvm-svn: 121497
 2010-12-10 18:36:02 +00:00