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0d5c0629bb
In preparation for an upcoming commit implementing unrolling preferences for x86, this adds additional fields to the UnrollingPreferences structure: - PartialThreshold and PartialOptSizeThreshold - Like Threshold and OptSizeThreshold, but used when not fully unrolling. These are necessary because we need different thresholds for full unrolling from those used when partially unrolling (the full unrolling thresholds are generally going to be larger). - MaxCount - A cap on the unrolling factor when partially unrolling. This can be used by a target to prevent the unrolled loop from exceeding some resource limit independent of the loop size (such as number of branches). There should be no functionality change for any in-tree targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205347 91177308-0d34-0410-b5e6-96231b3b80d8
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