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cmucl / cmucl
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rtoy
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computing the union of a bunch of disjoint integer types, usually from some DO loop. This fix implements a hack to short-circuit that case by checking to see if the union is long enough and instead of returning the precise union, we return the smallest interval that contains all of the integer types in the union. The max length of the union is set by *union-length-threshold*, defaulting to 50. This is a gross hack. We should do something better than this.