Jakob Stoklund Olesen e7ca8ecd92 Leave hasPHIKill flags alone in LiveInterval::RenumberValues. ...

It is conservatively correct to keep the hasPHIKill flags, even after
deleting PHI-defs.

The calculation can be very expensive after taildup has created a
quadratic number of indirectbr edges in the CFG, and the hasPHIKill flag
isn't used for anything after RenumberValues().

llvm-svn: 139780

2011-09-15 04:37:18 +00:00

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