entry := v.Block.Func.Entry
	if entry != v.Block {
		base.Fatalf("in %s, badly placed LoweredGetClosurePtr: %v %v", v.Block.Func.Name, v.Block, v)
	}
	for _, w := range entry.Values {
		if w == v {
			break
		}
		switch w.Op {
		case ssa.OpArgIntReg, ssa.OpArgFloatReg:
			// okay
		default:
			base.Fatalf("in %s, badly placed LoweredGetClosurePtr: %v %v", v.Block.Func.Name, v.Block, v)
		}
	}
}