[PowerPC] Readjust the loop unrolling threshold

Description

[PowerPC] Readjust the loop unrolling threshold

Now that the way that the partial unrolling threshold for small loops is used
to compute the unrolling factor as been corrected, a slightly smaller threshold
is preferable. This is expected; other targets may need to re-tune as well.

Details

Committed
hfinkelJan 9 2015, 4:31 PM
Parents
rL225565: [LoopUnroll] Fix the partial unrolling threshold for small loop sizes
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