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pipeline stall. It's useful for targets like ARM cortex-a8. NEON has a lot of long latency instructions so a strict register pressure reduction scheduler does not work well. Early experiments show this speeds up some NEON loops by over 30%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104216 91177308-0d34-0410-b5e6-96231b3b80d8 |
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