Sam Parker f281371190 [ARM] Improve loop unrolling for Cortex-M ...

- Set the default runtime unroll count to 4 and use the newly added
  UnrollRemainder option.
- Create loop cost and force unroll for a cost less than 12.
- Disable unrolling on Thumb1 only targets.

Differential Revision: https://reviews.llvm.org/D36134


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310997 91177308-0d34-0410-b5e6-96231b3b80d8

2017-08-16 07:42:44 +00:00

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lit.local.cfg

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loop-unrolling.ll

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