RFR: 8071571: Move substring of same string to slow path (original) (raw)
Martin Buchholz martinrb at google.com
Wed May 13 23:12:47 UTC 2015
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On Wed, May 13, 2015 at 4:06 PM, Vitaly Davidovich <vitalyd at gmail.com> wrote:
:) The branch avoiding versions may cause data dependence hazards whereas the branchy one just has branches but assuming perfectly predicted (and microbenchmarks typically are) can pipeline through. Ivan, could you please post the asm here? Assuming you guys are interested in investigating this further. there might be a new rule of thumb there: only eliminate branches if they are unlikely to be predicted.
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