clang/test/Sema/arm-layout.c

   1 // RUN: %clang_cc1 -triple armv7-unknown-unknown -target-abi apcs-gnu %s -verify
   2 // RUN: %clang_cc1 -triple armv7-unknown-unknown -target-abi aapcs %s -verify
   3 // expected-no-diagnostics
   4
   5 #define check(name, cond) int _##name##_check[(cond) ? 1 : -1]
   6
   7 struct s0 { char field0; double field1; };
   8 #ifdef __ARM_EABI__
   9 check(s0_size, sizeof(struct s0) == 16);
  10 #else
  11 check(s0_size, sizeof(struct s0) == 12);
  12 #endif
  13
  14 struct s1 { char field0; long double field1; };
  15 #ifdef __ARM_EABI__
  16 check(s1_size, sizeof(struct s1) == 16);
  17 #else
  18 check(s1_size, sizeof(struct s1) == 12);
  19 #endif
  20
  21 struct s2 {
  22   short field0;
  23   int field1 : 24;
  24   char field2;
  25 };
  26 #ifdef __ARM_EABI__
  27 check(s2_size, sizeof(struct s2) == 8);
  28 check(s2_offset_0, __builtin_offsetof(struct s2, field0) == 0);
  29 check(s2_offset_1, __builtin_offsetof(struct s2, field2) == 7);
  30 #else
  31 check(s2_size, sizeof(struct s2) == 6);
  32 check(s2_offset_0, __builtin_offsetof(struct s2, field0) == 0);
  33 check(s2_offset_1, __builtin_offsetof(struct s2, field2) == 5);
  34 #endif
  35
  36 struct s3 {
  37   short field0;
  38   int field1 : 24 __attribute__((aligned(4)));
  39   char field2;
  40 };
  41 check(s3_size, sizeof(struct s3) == 8);
  42 check(s3_offset_0, __builtin_offsetof(struct s3, field0) == 0);
  43 check(s3_offset_1, __builtin_offsetof(struct s3, field2) == 7);
  44
  45 struct s4 {
  46   int field0 : 4;
  47 };
  48 #ifdef __ARM_EABI__
  49 check(s4_size, sizeof(struct s4) == 4);
  50 check(s4_align, __alignof(struct s4) == 4);
  51 #else
  52 check(s4_size, sizeof(struct s4) == 1);
  53 check(s4_align, __alignof(struct s4) == 1);
  54 #endif