File: issue39459.go

package info (click to toggle)
gcc-arm-none-eabi 15%3A14.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,099,328 kB
  • sloc: cpp: 3,627,108; ansic: 2,571,498; ada: 834,230; f90: 235,082; makefile: 79,231; asm: 74,984; xml: 51,692; exp: 39,736; sh: 33,298; objc: 15,629; python: 15,069; fortran: 14,429; pascal: 7,003; awk: 5,070; perl: 3,106; ml: 285; lisp: 253; lex: 204; haskell: 135
file content (22 lines) | stat: -rw-r--r-- 583 bytes parent folder | download | duplicates (28) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
// 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{}
	}
}