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By Andrey_Karpov_2009
via blog.regehr.org
Published: Apr 10 2013 / 01:48

“Stochastic Superoptimization” is a fancy way to say “randomized search for fast machine code.” It is also the title of a nice paper that was presented recently at ASPLOS. Before getting into the details, let’s look at some background. At first glance the term “superoptimization” sounds like nonsense because the optimum point is already the best one. Compiler optimizers, however, don’t tend to create optimal code; rather, they make code better than it was. A superoptimizer, then, is either an optimizer that may be better than regular optimizers or else a code generator with optimality guarantees.
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