clang/test/CodeGenCXX/microsoft-uuidof.cpp

   1 // RUN: %clang_cc1 -emit-llvm %s -o - -DDEFINE_GUID -triple=i386-pc-linux -fms-extensions | FileCheck %s --check-prefix=CHECK-DEFINE-GUID
   2 // RUN: %clang_cc1 -emit-llvm %s -o - -DDEFINE_GUID -DBRACKET_ATTRIB -triple=i386-pc-linux -fms-extensions | FileCheck %s --check-prefix=CHECK-DEFINE-GUID
   3 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-linux -fms-extensions | FileCheck %s
   4 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-pc-linux -fms-extensions | FileCheck %s --check-prefix=CHECK-64
   5 // RUN: %clang_cc1 -emit-llvm %s -o - -DDEFINE_GUID -DWRONG_GUID -triple=i386-pc-linux -fms-extensions | FileCheck %s --check-prefix=CHECK-DEFINE-WRONG-GUID
   6
   7 #ifdef DEFINE_GUID
   8 struct _GUID {
   9 #ifdef WRONG_GUID
  10     unsigned int SomethingWentWrong;
  11 #else
  12     unsigned long  Data1;
  13     unsigned short Data2;
  14     unsigned short Data3;
  15     unsigned char  Data4[8];
  16 #endif
  17 };
  18 #endif
  19 typedef struct _GUID GUID;
  20
  21 #ifdef BRACKET_ATTRIB
  22 [uuid(12345678-1234-1234-1234-1234567890aB)] struct S1 { } s1;
  23 [uuid(87654321-4321-4321-4321-ba0987654321)] struct S2 { };
  24 [uuid({12345678-1234-1234-1234-1234567890ac})] struct Curly;
  25 [uuid({12345678-1234-1234-1234-1234567890ac})] struct Curly;
  26 #else
  27 struct __declspec(uuid("12345678-1234-1234-1234-1234567890aB")) S1 { } s1;
  28 struct __declspec(uuid("87654321-4321-4321-4321-ba0987654321")) S2 { };
  29 struct __declspec(uuid("{12345678-1234-1234-1234-1234567890ac}")) Curly;
  30 struct __declspec(uuid("{12345678-1234-1234-1234-1234567890ac}")) Curly;
  31 #endif
  32
  33 void side_effect();
  34
  35 #ifdef DEFINE_GUID
  36 // Make sure we can properly generate code when the UUID has curly braces on it.
  37 GUID thing = (side_effect(), __uuidof(Curly));
  38 // CHECK-DEFINE-GUID: @thing ={{.*}} global %struct._GUID zeroinitializer, align 4
  39 // CHECK-DEFINE-WRONG-GUID: @thing ={{.*}} global %struct._GUID zeroinitializer, align 4
  40
  41 // This gets initialized in a static initializer.
  42 // CHECK-DEFINE-GUID: @g ={{.*}} global %struct._GUID zeroinitializer, align 4
  43 // CHECK-DEFINE-WRONG-GUID: @g ={{.*}} global %struct._GUID zeroinitializer, align 4
  44 GUID g = (side_effect(), __uuidof(S1));
  45
  46 // CHECK-DEFINE-GUID: @const_init ={{.*}} global %struct._GUID { i32 305419896, i16 4660, i16 4660, [8 x i8] c"\124\124Vx\90\AC" }
  47 // CHECK-DEFINE-WRONG-GUID: @const_init ={{.*}} global %struct._GUID zeroinitializer
  48 GUID const_init = __uuidof(Curly);
  49 #endif
  50
  51 // First global use of __uuidof(S1) forces the creation of the global.
  52 // CHECK: @_GUID_12345678_1234_1234_1234_1234567890ab = linkonce_odr constant { i32, i16, i16, [8 x i8] } { i32 305419896, i16 4660, i16 4660, [8 x i8] c"\124\124Vx\90\AB" }, comdat
  53 // CHECK: @gr ={{.*}} constant %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to %struct._GUID*), align 4
  54 // CHECK-64: @gr ={{.*}} constant %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to %struct._GUID*), align 8
  55 const GUID& gr = __uuidof(S1);
  56
  57 // CHECK: @gp ={{.*}} global %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to %struct._GUID*), align 4
  58 const GUID* gp = &__uuidof(S1);
  59
  60 // CHECK: @cp ={{.*}} global %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ac to %struct._GUID*), align 4
  61 const GUID* cp = &__uuidof(Curly);
  62
  63 // Special case: _uuidof(0)
  64 // CHECK: @zeroiid ={{.*}} constant %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_00000000_0000_0000_0000_000000000000 to %struct._GUID*), align 4
  65 const GUID& zeroiid = __uuidof(0);
  66
  67 // __uuidof(S2) hasn't been used globally yet, so it's emitted when it's used
  68 // in a function and is emitted at the end of the globals section.
  69 // CHECK: @_GUID_87654321_4321_4321_4321_ba0987654321 = linkonce_odr constant { i32, i16, i16, [8 x i8] } { i32 -2023406815, i16 17185, i16 17185, [8 x i8] c"C!\BA\09\87eC!" }, comdat
  70
  71 // The static initializer for thing.
  72 // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 bitcast (%struct._GUID* @thing to i8*), i8* align 4 bitcast (%struct._GUID* @_GUID_12345678_1234_1234_1234_1234567890ac to i8*), i32 16, i1 false)
  73 // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 bitcast (%struct._GUID* @thing to i8*), i8* align 4 bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ac to i8*), i32 4, i1 false)
  74
  75 // The static initializer for g.
  76 // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 bitcast (%struct._GUID* @g to i8*), i8* align 4 bitcast (%struct._GUID* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 16, i1 false)
  77 // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 bitcast (%struct._GUID* @g to i8*), i8* align 4 bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 4, i1 false)
  78
  79 // We don't constant-initialize const_init if the definition of _GUID is dodgy.
  80 // CHECK-DEFINE-GUID-NOT: @const_init
  81 // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 bitcast (%struct._GUID* @const_init to i8*), i8* align 4 bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ac to i8*), i32 4, i1 false)
  82
  83 #ifdef DEFINE_GUID
  84 void fun() {
  85   // CHECK-DEFINE-GUID: %s1_1 = alloca %struct._GUID, align 4
  86   // CHECK-DEFINE-WRONG-GUID: %s1_1 = alloca %struct._GUID, align 4
  87   // CHECK-DEFINE-GUID: %s1_2 = alloca %struct._GUID, align 4
  88   // CHECK-DEFINE-WRONG-GUID: %s1_2 = alloca %struct._GUID, align 4
  89   // CHECK-DEFINE-GUID: %s1_3 = alloca %struct._GUID, align 4
  90   // CHECK-DEFINE-WRONG-GUID: %s1_3 = alloca %struct._GUID, align 4
  91
  92   // CHECK-DEFINE-GUID: [[U1:%.+]] = bitcast %struct._GUID* %s1_1 to i8*
  93   // CHECK-DEFINE-WRONG-GUID: [[U1:%.+]] = bitcast %struct._GUID* %s1_1 to i8*
  94   // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 [[U1]], i8* align 4 bitcast (%struct._GUID* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 16, i1 false)
  95   // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 [[U1]], i8* align 4 bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 4, i1 false)
  96   GUID s1_1 = (side_effect(), __uuidof(S1));
  97
  98   // CHECK-DEFINE-GUID: [[U2:%.+]] = bitcast %struct._GUID* %s1_2 to i8*
  99   // CHECK-DEFINE-WRONG-GUID: [[U2:%.+]] = bitcast %struct._GUID* %s1_2 to i8*
 100   // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 [[U2]], i8* align 4 bitcast (%struct._GUID* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 16, i1 false)
 101   // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 [[U2]], i8* align 4 bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 4, i1 false)
 102   GUID s1_2 = (side_effect(), __uuidof(S1));
 103
 104   // CHECK-DEFINE-GUID: [[U3:%.+]] = bitcast %struct._GUID* %s1_3 to i8*
 105   // CHECK-DEFINE-WRONG-GUID: [[U3:%.+]] = bitcast %struct._GUID* %s1_3 to i8*
 106   // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 [[U3]], i8* align 4 bitcast (%struct._GUID* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 16, i1 false)
 107   // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 [[U3]], i8* align 4 bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 4, i1 false)
 108   GUID s1_3 = (side_effect(), __uuidof(s1));
 109 }
 110 #endif
 111
 112 void gun() {
 113 #ifdef DEFINE_GUID
 114   // CHECK-DEFINE-GUID: %s2_1 = alloca %struct._GUID, align 4
 115   // CHECK-DEFINE-WRONG-GUID: %s2_1 = alloca %struct._GUID, align 4
 116   // CHECK-DEFINE-GUID: %s2_2 = alloca %struct._GUID, align 4
 117   // CHECK-DEFINE-WRONG-GUID: %s2_2 = alloca %struct._GUID, align 4
 118   GUID s2_1 = __uuidof(S2);
 119   GUID s2_2 = __uuidof(S2);
 120 #endif
 121   // CHECK: %r = alloca %struct._GUID*, align 4
 122   // CHECK: %p = alloca %struct._GUID*, align 4
 123   // CHECK: %zeroiid = alloca %struct._GUID*, align 4
 124
 125   // CHECK: store %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_87654321_4321_4321_4321_ba0987654321 to %struct._GUID*), %struct._GUID** %r, align 4
 126   const GUID& r = __uuidof(S2);
 127   // CHECK: store %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_87654321_4321_4321_4321_ba0987654321 to %struct._GUID*), %struct._GUID** %p, align 4
 128   const GUID* p = &__uuidof(S2);
 129
 130   // Special case _uuidof(0), local scope version.
 131   // CHECK: store %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_00000000_0000_0000_0000_000000000000 to %struct._GUID*), %struct._GUID** %zeroiid, align 4
 132   const GUID& zeroiid = __uuidof(0);
 133 }
 134
 135 namespace DeclRefExprNamingGUID {
 136   template<const _GUID &g> const _GUID &f() { return g; }
 137   struct __declspec(uuid("12345678-1234-1234-1234-123412341234")) S {};
 138   auto &r = f<__uuidof(S)>();
 139 }