func allBlank(exprs []ir.Node) bool {
	for _, expr := range exprs {
		if !ir.IsBlank(expr) {
			return false
		}
	}
	return true
}

// tryStaticInit attempts to statically execute an initialization
// statement and reports whether it succeeded.
func (s *Schedule) tryStaticInit(n ir.Node) bool {
	var lhs []ir.Node
	var rhs ir.Node

	switch n.Op() {
	default: