clang/test/Layout/ms_struct-bitfields.c

   1 // RUN: %clang_cc1 -emit-llvm-only -triple armv7-apple-darwin -fdump-record-layouts %s 2>/dev/null \
   2 // RUN:            | FileCheck %s
   3
   4 // rdar://22275433
   5
   6 #pragma ms_struct on
   7
   8 union A {
   9   unsigned long long x : 32;
  10   unsigned long long y : 32;
  11 } a;
  12 // CHECK:*** Dumping AST Record Layout
  13 // CHECK-NEXT:        0 | union A
  14 // CHECK-NEXT:   0:0-31 |   unsigned long long x
  15 // CHECK-NEXT:   0:0-31 |   unsigned long long y
  16 // CHECK-NEXT:          | [sizeof=8, align=1]
  17
  18 union B {
  19   __attribute__((aligned(4)))
  20   unsigned long long x : 32;
  21   unsigned long long y : 32;
  22 } b;
  23 // CHECK:*** Dumping AST Record Layout
  24 // CHECK-NEXT:       0 | union B
  25 // CHECK-NEXT:  0:0-31 |   unsigned long long x
  26 // CHECK-NEXT:  0:0-31 |   unsigned long long y
  27 // CHECK-NEXT:         | [sizeof=8, align=1]
  28
  29 union C {
  30   unsigned long long : 0;
  31   unsigned short y : 8;
  32 } c;
  33 // CHECK:*** Dumping AST Record Layout
  34 // CHECK-NEXT:       0 | union C
  35 // CHECK-NEXT:     0:- |   unsigned long long
  36 // CHECK-NEXT:   0:0-7 |   unsigned short y
  37 // CHECK-NEXT:         | [sizeof=2, align=1]
  38
  39 union D {
  40   unsigned long long : 0;
  41   unsigned short : 0;
  42 } d;
  43 // CHECK:*** Dumping AST Record Layout
  44 // CHECK-NEXT:       0 | union D
  45 // CHECK-NEXT:     0:- |   unsigned long long
  46 // CHECK-NEXT:     0:- |   unsigned short
  47 // CHECK-NEXT:         | [sizeof=1, align=1]
  48