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* [ARM] Enable Unroll UpperBoundDavid Green2019-06-101-0/+38
This option allows loops with small max trip counts to be fully unrolled. This can help with code like the remainder loops from manually unrolled loops like those that appear in the cmsis dsp library. We would apparently previously runtime unroll them with the default unroll count (4). Differential Revision: https://reviews.llvm.org/D63064 llvm-svn: 362928
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