File: pragma-pack-3.c

package info (click to toggle)
llvm-toolchain-3.9 1%3A3.9.1-9
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 441,144 kB
  • ctags: 428,836
  • sloc: cpp: 2,546,577; ansic: 538,318; asm: 119,677; objc: 103,316; python: 102,148; sh: 27,847; pascal: 5,626; ml: 5,510; perl: 5,293; lisp: 4,801; makefile: 2,177; xml: 686; cs: 362; php: 212; csh: 117
file content (35 lines) | stat: -rw-r--r-- 820 bytes parent folder | download | duplicates (42)
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];