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Per Vognsen

@zwarich @chandlerc The newer ConstraintElim pass in LLVM made a relatively big difference in generated code quality when it comes to non-trivial bounds check elimination.

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Paul Khuong

@pervognsen @zwarich @chandlerc there must be a lot of low hanging fruit if gcc is the benchmark :x SBCL(!) used to be stronger at integer range propagation than gcc for finer than power of 2/word size information. OTOH, I guess using range info to generate simpler div by mul is pretty niche.

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