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 #pragma ms_struct on
   5
   6 union A {
   7   unsigned long long x : 32;
   8   unsigned long long y : 32;
   9 } a;
  10 // CHECK:*** Dumping AST Record Layout
  11 // CHECK-NEXT:        0 | union A
  12 // CHECK-NEXT:   0:0-31 |   unsigned long long x
  13 // CHECK-NEXT:   0:0-31 |   unsigned long long y
  14 // CHECK-NEXT:          | [sizeof=8, align=1]
  15
  16 union B {
  17   __attribute__((aligned(4)))
  18   unsigned long long x : 32;
  19   unsigned long long y : 32;
  20 } b;
  21 // CHECK:*** Dumping AST Record Layout
  22 // CHECK-NEXT:       0 | union B
  23 // CHECK-NEXT:  0:0-31 |   unsigned long long x
  24 // CHECK-NEXT:  0:0-31 |   unsigned long long y
  25 // CHECK-NEXT:         | [sizeof=8, align=1]
  26
  27 union C {
  28   unsigned long long : 0;
  29   unsigned short y : 8;
  30 } c;
  31 // CHECK:*** Dumping AST Record Layout
  32 // CHECK-NEXT:       0 | union C
  33 // CHECK-NEXT:     0:- |   unsigned long long
  34 // CHECK-NEXT:   0:0-7 |   unsigned short y
  35 // CHECK-NEXT:         | [sizeof=2, align=1]
  36
  37 union D {
  38   unsigned long long : 0;
  39   unsigned short : 0;
  40 } d;
  41 // CHECK:*** Dumping AST Record Layout
  42 // CHECK-NEXT:       0 | union D
  43 // CHECK-NEXT:     0:- |   unsigned long long
  44 // CHECK-NEXT:     0:- |   unsigned short
  45 // CHECK-NEXT:         | [sizeof=1, align=1]
  46