File: optimized_offset_of_empty.swift

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (45 lines) | stat: -rw-r--r-- 715 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
 
// RUN: %empty-directory(%t)
// RUN: %target-build-swift -module-name=test %s -o %t/a.out
// RUN: %target-codesign %t/a.out
// RUN: %target-run %t/a.out | %FileCheck %s
// RUN: %target-build-swift -module-name=test -O %s -o %t/a.out
// RUN: %target-codesign %t/a.out
// RUN: %target-run %t/a.out | %FileCheck %s
// REQUIRES: executable_test


enum E {
  case A
}

struct X {}

struct S {
  let i: Int
  let e: E
  let x: X
}

var gg: Int? = 27

@inline(never)
func getOffsetE() {
  gg = MemoryLayout<S>.offset(of: \.e)
}

@inline(never)
func getOffsetX() {
  gg = MemoryLayout<S>.offset(of: \.x)
}

getOffsetE()

// CHECK: Optional(0)
print(gg as Any)

gg = 27

getOffsetX()

// CHECK: Optional(0)
print(gg as Any)