| // compile |
| |
| // Copyright 2020 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. |
| |
| package p |
| |
| type T struct { // big enough to be an unSSAable type |
| a, b, c, d, e, f int |
| } |
| |
| func f(x interface{}, p *int) { |
| _ = *p // trigger nil check here, removing it from below |
| switch x := x.(type) { |
| case *T: |
| // Zero twice, so one of them will be removed by the deadstore pass |
| *x = T{} |
| *p = 0 // store op to prevent Zero ops from being optimized by the earlier opt pass rewrite rules |
| *x = T{} |
| } |
| } |
