clang/test/Sema/align-x86.c

   1 // RUN: %clang_cc1 -std=c11 -triple i386-apple-darwin9 -fsyntax-only -verify %s
   2
   3 #define STATIC_ASSERT(cond) _Static_assert(cond, #cond)
   4
   5 // PR3433
   6 #define CHECK_ALIGNMENT(type, name, abi, pref) \
   7   type name; \
   8   STATIC_ASSERT(__alignof__(name) == pref); \
   9   STATIC_ASSERT(__alignof__(type) == pref); \
  10   STATIC_ASSERT(_Alignof(type) == abi)
  11
  12 CHECK_ALIGNMENT(double, g_double, 4, 8);
  13 CHECK_ALIGNMENT(long long, g_longlong, 4, 8);
  14 CHECK_ALIGNMENT(unsigned long long, g_ulonglong, 4, 8);
  15 CHECK_ALIGNMENT(_Complex double, g_complexdouble, 4, 8);
  16
  17 // PR6362
  18 struct __attribute__((packed))
  19 packed_struct {
  20   unsigned int a;
  21 };
  22 CHECK_ALIGNMENT(struct packed_struct, g_packedstruct, 1, 1);
  23 STATIC_ASSERT(__alignof__(g_packedstruct.a) == 1);
  24
  25 typedef double arr3double[3];
  26 CHECK_ALIGNMENT(arr3double, g_arr3double, 4, 8);
  27
  28 enum big_enum { x = 18446744073709551615ULL };
  29 CHECK_ALIGNMENT(enum big_enum, g_bigenum, 4, 8);
  30
  31 // PR5637
  32
  33 #define ALIGNED(x) __attribute__((aligned(x)))
  34
  35 typedef ALIGNED(2) struct {
  36   char a[3];
  37 } aligned_before_struct;
  38
  39 STATIC_ASSERT(sizeof(aligned_before_struct)       == 3);
  40 STATIC_ASSERT(sizeof(aligned_before_struct[1])    == 4); // expected-error {{size of array element}}
  41 STATIC_ASSERT(sizeof(aligned_before_struct[2])    == 6); // expected-error {{size of array element}}
  42 STATIC_ASSERT(sizeof(aligned_before_struct[2][1]) == 8); // expected-error {{size of array element}}
  43 STATIC_ASSERT(sizeof(aligned_before_struct[1][2]) == 6); // expected-error {{size of array element}}
  44
  45 typedef struct ALIGNED(2) {
  46   char a[3];
  47 } aligned_after_struct;
  48
  49 STATIC_ASSERT(sizeof(aligned_after_struct)       == 4);
  50 STATIC_ASSERT(sizeof(aligned_after_struct[1])    == 4);
  51 STATIC_ASSERT(sizeof(aligned_after_struct[2])    == 8);
  52 STATIC_ASSERT(sizeof(aligned_after_struct[2][1]) == 8);
  53 STATIC_ASSERT(sizeof(aligned_after_struct[1][2]) == 8);