Jakob Stoklund Olesen 622848b262 Implement single block splitting. ...

Before spilling a live range, we split it into a separate range for each basic
block where it is used. That way we only get one reload per basic block if the
new smaller ranges can allocate to a register.

This type of splitting is already present in the standard spiller.

llvm-svn: 110934

2010-08-12 17:07:14 +00:00

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