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Author SHA1 Message Date
David Green 14b2ec934e [ARM] Enable UpperBound unrolling for all loops 
This UpperBound unrolling was already enabled so long as a series of
conditions in ARMTTIImpl::getUnrollingPreferences pass. This just always
enables it as it can help fully unroll loops that would not otherwise
pass those tests.

Differential Revision: https://reviews.llvm.org/D99174
 2021-03-24 16:39:21 +00:00
David Green 003fab9e8d [ARM] Additional Upper bound unrolling test. NFC 2021-03-23 12:00:40 +00:00
David Green d847aa573b [ARM] Enable Unroll UpperBound 
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
 2019-06-10 10:22:14 +00:00