tree ad3cefea1a85699d9de779752299a9f90a50792a
parent b2f0b595a3aac4da1265cfa2f7a53baaa229328f
author Jakob Stoklund Olesen <stoklund@2pi.dk> 1357952099 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> 1357952099 +0000

Precompute some information about register costs.

Remember the minimum cost of the registers in an allocation order and
the number of registers at the end of the allocation order that have the
same cost per use.

This information can be used to limit the search space for
RAGreedy::tryEvict() when looking for a cheaper register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172280 91177308-0d34-0410-b5e6-96231b3b80d8