|  | // run | 
|  |  | 
|  | // Copyright 2018 The Go Authors. All rights reserved. | 
|  | // Use of this source code is governed by a BSD-style | 
|  | // license that can be found in the LICENSE file. | 
|  |  | 
|  | // Issue 27961: some optimizations generate OffPtr with wrong | 
|  | // types, which causes invalid bytecode on Wasm. | 
|  |  | 
|  | package main | 
|  |  | 
|  | import "math" | 
|  |  | 
|  | type Vec2 [2]float64 | 
|  |  | 
|  | func main() { | 
|  | var a Vec2 | 
|  | a.A().B().C().D() | 
|  | } | 
|  |  | 
|  | func (v Vec2) A() Vec2 { | 
|  | return Vec2{v[0], v[0]} | 
|  | } | 
|  |  | 
|  | func (v Vec2) B() Vec2 { | 
|  | return Vec2{1.0 / v.D(), 0} | 
|  | } | 
|  |  | 
|  | func (v Vec2) C() Vec2 { | 
|  | return Vec2{v[0], v[0]} | 
|  | } | 
|  |  | 
|  | func (v Vec2) D() float64 { | 
|  | return math.Sqrt(v[0]) | 
|  | } |