// UseWriteBarrier reports whether write barrier is enabled
	UseWriteBarrier() bool

	// Func returns the ir.Func of the function being compiled.
	Func() *ir.Func
}

// NewConfig returns a new configuration object for the given architecture.
func NewConfig(arch string, types Types, ctxt *obj.Link, optimize, softfloat bool) *Config {
	c := &Config{arch: arch, Types: types}
	c.useAvg = true
	c.useHmul = true
	switch arch {