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cmd/compile: teach prove about min #30584

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josharian opened this Issue Mar 5, 2019 · 0 comments

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josharian commented Mar 5, 2019

package p

func f(x, y []int) {
	n := len(x)
	if len(y) < n {
		n = len(y)
	}
	for i := 0; i < n; i++ {
		_ = x[i]
		_ = y[i]
	}
}

Ideally there would be no bounds checks in the loop. Right now there are.

This grew out of a conversation in CL 164966.

cc @rasky @aclements @zdjones

josharian added Performance NeedsFix labels Mar 5, 2019

josharian added this to the Unplanned milestone Mar 5, 2019

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