// We only want "real" calls to these
			// functions, not the generated ones within
			// their own ABI wrappers.
			continue
		}
		ir.Visit(n, c.findExtraCalls)
	}
	c.curfn = nil
	return c
}

func (c *nowritebarrierrecChecker) findExtraCalls(nn ir.Node) {
	if nn.Op() != ir.OCALLFUNC {
		return
	}
	n := nn.(*ir.CallExpr)
	if n.Fun == nil || n.Fun.Op() != ir.ONAME {
		return
	}