File: pragma-pack-3.c

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (35 lines) | stat: -rw-r--r-- 820 bytes parent folder | download | duplicates (39) 
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
 
// RUN: %clang_cc1 -triple i686-apple-darwin9 %s -fsyntax-only -verify
// expected-no-diagnostics

// Stack: [], Alignment: 8

#pragma pack(push, 1)
// Stack: [8], Alignment: 1

#pragma pack(push, 4)
// Stack: [8, 1], Alignment: 4

// Note that this differs from gcc; pack() in gcc appears to pop the
// top stack entry and resets the current alignment. This is both
// inconsistent with MSVC, and the gcc documentation. In other cases,
// for example changing this to pack(8), I don't even understand what gcc
// is doing.

#pragma pack()
// Stack: [8, 1], Alignment: 8

#pragma pack(pop)
// Stack: [8], Alignment: 1
struct s0 {
  char f0;
  short f1;
};
int a[sizeof(struct s0) == 3 ? 1 : -1];

#pragma pack(pop)
// Stack: [], Alignment: 8
struct s1 {
  char f0;
  short f1;
};
int b[sizeof(struct s1) == 4 ? 1 : -1];