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Re:STOKE – a stochastic optimizer for x86_64 assembly by derf_ on Tuesday January 19, 2016 @08:50AM (#10930681)
I applied this to some pieces of Daala's entropy coder: https://review.xiph.org/763/#msg2

The output needs a bit of manual review (see the mixing of 32-bit and 16-bit accesses to the same register in the second example), but it was definitely able to find something non-obvious in a sequence far too long for exhaustive search.

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