needWidth = true
	} else if base.Flag.Race && t.NumComponents(types.CountBlankFields) > 1 {
		// for composite objects we have to write every address
		// because a write might happen to any subobject.
		// composites with only one element don't have subobjects, though.
		switch kind {
		case instrumentRead:
			fn = ir.Syms.Racereadrange
		case instrumentWrite:
			fn = ir.Syms.Racewriterange
		default:
			panic("unreachable")