const testing.loopPoisonMask

3 uses

	testing (current package)
		benchmark.go#L404: 	if b.loop.n&loopPoisonMask != 0 {
		benchmark.go#L419: 	if b.loop.i&loopPoisonMask != 0 {
		benchmark.go#L532: 	loopPoisonMask = ^uint64((1 << (63 - (iota - 1))) - 1)