WIP: Optimize counter bitwidth in Foreach control#293

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kumasento wants to merge 3 commits intostanford-ppl:masterfrom kumasento:dev-opt-cnt

+200

Commits on Feb 2, 2020

Setup the structure of counter bitwidth opt
kumasento
committed

Commits on Feb 3, 2020

Basic counter bitwidth optimization
kumasento
committed

Commits on Feb 4, 2020

Added all bitwidth conditions (< 32)
kumasento
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