clang/test/CodeGen/2007-09-12-PragmaPack.c

   1 // RUN: %clang_cc1 -emit-llvm -o - %s | FileCheck %s
   2
   3 typedef unsigned char uint8_t;
   4 typedef unsigned short uint16_t;
   5 typedef unsigned int uint32_t;
   6
   7 #pragma pack(push, 1)
   8 typedef struct
   9 {
  10         uint32_t        a;
  11 } foo;
  12
  13 typedef struct {
  14         uint8_t         major;
  15         uint8_t         minor;
  16         uint16_t        build;
  17 } VERSION;
  18
  19 typedef struct {
  20         uint8_t       a[5];
  21         VERSION       version;
  22         uint8_t       b;
  23         foo           d;
  24         uint32_t      guard;
  25 } bar;
  26 #pragma pack(pop)
  27
  28
  29 unsigned barsize(void) {
  30   // CHECK: ret i32 18
  31   return sizeof(bar);
  32 }