clang/test/Layout/aix-packed-bitfields.c

   1 // RUN: %clang_cc1 -triple powerpc-ibm-aix-xcoff -fdump-record-layouts \
   2 // RUN:     -fsyntax-only -fxl-pragma-pack -x c %s | \
   3 // RUN:   FileCheck --check-prefixes=CHECK,32BIT %s
   4
   5 // RUN: %clang_cc1 -triple powerpc-ibm-aix-xcoff -fdump-record-layouts \
   6 // RUN:     -fsyntax-only -fxl-pragma-pack -x c++ %s | \
   7 // RUN:   FileCheck --check-prefixes=CHECK,32BIT %s
   8
   9 // RUN: %clang_cc1 -triple powerpc64-ibm-aix-xcoff -fdump-record-layouts \
  10 // RUN:     -fsyntax-only -fxl-pragma-pack -x c %s | \
  11 // RUN:   FileCheck --check-prefixes=CHECK,64BIT %s
  12
  13 // RUN: %clang_cc1 -triple powerpc64-ibm-aix-xcoff -fdump-record-layouts \
  14 // RUN:     -fsyntax-only -fxl-pragma-pack -x c++ %s | \
  15 // RUN:   FileCheck --check-prefixes=CHECK,64BIT %s
  16
  17 struct A {
  18   int a1 : 30;
  19   int a2 : 30;
  20   int a3 : 4;
  21 };
  22
  23 int a = sizeof(struct A);
  24
  25 // CHECK:      *** Dumping AST Record Layout
  26 // CHECK-NEXT:      0 | struct A
  27 // CHECK-NEXT: 0:0-29 |   int a1
  28 // CHECK-NEXT: 4:0-29 |   int a2
  29 // CHECK-NEXT:  8:0-3 |   int a3
  30 // CHECK-NEXT:          sizeof=12, {{(dsize=12, )?}}align=4, preferredalign=4
  31
  32 #pragma align(packed)
  33 struct AlignPacked {
  34   int a1 : 30;
  35   int a2 : 30;
  36   int a3 : 4;
  37 };
  38 #pragma align(reset)
  39
  40 int b = sizeof(struct AlignPacked);
  41
  42 // CHECK:      *** Dumping AST Record Layout
  43 // CHECK-NEXT:      0 | struct AlignPacked
  44 // CHECK-NEXT: 0:0-29 |   int a1
  45 // CHECK-NEXT: 3:6-35 |   int a2
  46 // CHECK-NEXT:  7:4-7 |   int a3
  47 // CHECK-NEXT:          sizeof=8, {{(dsize=8, )?}}align=1, preferredalign=1
  48
  49 #pragma pack(1)
  50 struct Pack1 {
  51   int a1 : 30;
  52   int a2 : 30;
  53   int a3 : 4;
  54 };
  55 #pragma pack(pop)
  56
  57 int c = sizeof(struct Pack1);
  58
  59 // CHECK:      *** Dumping AST Record Layout
  60 // CHECK-NEXT:      0 | struct Pack1
  61 // CHECK-NEXT: 0:0-29 |   int a1
  62 // CHECK-NEXT: 3:6-35 |   int a2
  63 // CHECK-NEXT:  7:4-7 |   int a3
  64 // CHECK-NEXT:          sizeof=8, {{(dsize=8, )?}}align=1, preferredalign=1
  65
  66 #pragma pack(2)
  67 struct Pack2 {
  68   int a1 : 30;
  69   int a2 : 30;
  70   int a3 : 4;
  71 };
  72 #pragma pack(pop)
  73
  74 int d = sizeof(struct Pack2);
  75
  76 // CHECK:      *** Dumping AST Record Layout
  77 // CHECK-NEXT:      0 | struct Pack2
  78 // CHECK-NEXT: 0:0-29 |   int a1
  79 // CHECK-NEXT: 3:6-35 |   int a2
  80 // CHECK-NEXT:  7:4-7 |   int a3
  81 // CHECK-NEXT:          sizeof=8, {{(dsize=8, )?}}align=2, preferredalign=2
  82 //
  83 struct __attribute__((packed)) PackedAttr {
  84   char f1;
  85   int : 0;
  86   short : 3;
  87   char f4 : 2;
  88 };
  89
  90 int e = sizeof(struct PackedAttr);
  91 // CHECK:      *** Dumping AST Record Layout
  92 // CHECK-NEXT:      0 | struct PackedAttr
  93 // CHECK-NEXT:      0 |   char f1
  94 // CHECK-NEXT:    4:- |   int
  95 // CHECK-NEXT:  4:0-2 |   short
  96 // CHECK-NEXT:  4:3-4 |   char f4
  97 // CHECK-NEXT:          sizeof=5, {{(dsize=5, )?}}align=1, preferredalign=1
  98
  99 #pragma pack(2)
 100 struct __attribute__((packed)) PackedAttrAndPragma {
 101   char f1;
 102   long long : 0;
 103 };
 104 #pragma pack(pop)
 105
 106 int f = sizeof(struct PackedAttrAndPragma);
 107 // CHECK:      *** Dumping AST Record Layout
 108 // CHECK-NEXT:      0 | struct PackedAttrAndPragma
 109 // CHECK-NEXT:      0 |   char f1
 110 // 32BIT-NEXT:    4:- |   long long
 111 // 32BIT-NEXT:          sizeof=4, {{(dsize=4, )?}}align=1, preferredalign=1
 112 // 64BIT-NEXT:    8:- |   long long
 113 // 64BIT-NEXT:          sizeof=8, {{(dsize=8, )?}}align=1, preferredalign=1