}
	return boundedDotPtr(base.Pos, itab, itabTypeField)
}

var itabTypeField *types.Field

// boundedDotPtr returns a selector expression representing ptr.field
// and omits nil-pointer checks for ptr.
func boundedDotPtr(pos src.XPos, ptr ir.Node, field *types.Field) *ir.SelectorExpr {

		// runtime.itab's hash field
		if itabHashField == nil {
			itabHashField = runtimeField("hash", rttype.ITab.OffsetOf("Hash"), types.Types[types.TUINT32])
		}
		hashField = itabHashField
	}
	return boundedDotPtr(pos, itab, hashField)
}

var rtypeHashField, itabHashField *types.Field

// A typeSwitch walks a type switch.
type typeSwitch struct {