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      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 - -triple=i386-pc-linux -fms-extensions | FileCheck %s
      3 // 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
      4 
      5 #ifdef DEFINE_GUID
      6 struct _GUID {
      7 #ifdef WRONG_GUID
      8     unsigned int SomethingWentWrong;
      9 #else
     10     unsigned long  Data1;
     11     unsigned short Data2;
     12     unsigned short Data3;
     13     unsigned char  Data4[8];
     14 #endif
     15 };
     16 #endif
     17 typedef struct _GUID GUID;
     18 
     19 struct __declspec(uuid("12345678-1234-1234-1234-1234567890aB")) S1 { } s1;
     20 struct __declspec(uuid("87654321-4321-4321-4321-ba0987654321")) S2 { };
     21 struct __declspec(uuid("{12345678-1234-1234-1234-1234567890ac}")) Curly;
     22 struct __declspec(uuid("{12345678-1234-1234-1234-1234567890ac}")) Curly;
     23 
     24 #ifdef DEFINE_GUID
     25 // Make sure we can properly generate code when the UUID has curly braces on it.
     26 GUID thing = __uuidof(Curly);
     27 // CHECK-DEFINE-GUID: @thing = global %struct._GUID zeroinitializer, align 4
     28 // CHECK-DEFINE-WRONG-GUID: @thing = global %struct._GUID zeroinitializer, align 4
     29 
     30 // This gets initialized in a static initializer.
     31 // CHECK-DEFINE-GUID: @g = global %struct._GUID zeroinitializer, align 4
     32 // CHECK-DEFINE-WRONG-GUID: @g = global %struct._GUID zeroinitializer, align 4
     33 GUID g = __uuidof(S1);
     34 #endif
     35 
     36 // First global use of __uuidof(S1) forces the creation of the global.
     37 // 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
     38 // CHECK: @gr = constant %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to %struct._GUID*), align 4
     39 const GUID& gr = __uuidof(S1);
     40 
     41 // CHECK: @gp = global %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to %struct._GUID*), align 4
     42 const GUID* gp = &__uuidof(S1);
     43 
     44 // CHECK: @cp = global %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ac to %struct._GUID*), align 4
     45 const GUID* cp = &__uuidof(Curly);
     46 
     47 // Special case: _uuidof(0)
     48 // CHECK: @zeroiid = constant %struct._GUID* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_00000000_0000_0000_0000_000000000000 to %struct._GUID*), align 4
     49 const GUID& zeroiid = __uuidof(0);
     50 
     51 // __uuidof(S2) hasn't been used globally yet, so it's emitted when it's used
     52 // in a function and is emitted at the end of the globals section.
     53 // 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
     54 
     55 // The static initializer for thing.
     56 // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* bitcast (%struct._GUID* @thing to i8*), i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ac to i8*), i32 16, i32 4, i1 false)
     57 // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* bitcast (%struct._GUID* @thing to i8*), i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ac to i8*), i32 4, i32 4, i1 false)
     58 
     59 // The static initializer for g.
     60 // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* bitcast (%struct._GUID* @g to i8*), i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 16, i32 4, i1 false)
     61 // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* bitcast (%struct._GUID* @g to i8*), i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 4, i32 4, i1 false)
     62 
     63 #ifdef DEFINE_GUID
     64 void fun() {
     65   // CHECK-DEFINE-GUID: %s1_1 = alloca %struct._GUID, align 4
     66   // CHECK-DEFINE-WRONG-GUID: %s1_1 = alloca %struct._GUID, align 4
     67   // CHECK-DEFINE-GUID: %s1_2 = alloca %struct._GUID, align 4
     68   // CHECK-DEFINE-WRONG-GUID: %s1_2 = alloca %struct._GUID, align 4
     69   // CHECK-DEFINE-GUID: %s1_3 = alloca %struct._GUID, align 4
     70   // CHECK-DEFINE-WRONG-GUID: %s1_3 = alloca %struct._GUID, align 4
     71 
     72   // CHECK-DEFINE-GUID: [[U1:%.+]] = bitcast %struct._GUID* %s1_1 to i8*
     73   // CHECK-DEFINE-WRONG-GUID: [[U1:%.+]] = bitcast %struct._GUID* %s1_1 to i8*
     74   // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U1]], i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 16, i32 4, i1 false)
     75   // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U1]], i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 4, i32 4, i1 false)
     76   GUID s1_1 = __uuidof(S1);
     77 
     78   // CHECK-DEFINE-GUID: [[U2:%.+]] = bitcast %struct._GUID* %s1_2 to i8*
     79   // CHECK-DEFINE-WRONG-GUID: [[U2:%.+]] = bitcast %struct._GUID* %s1_2 to i8*
     80   // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U2]], i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 16, i32 4, i1 false)
     81   // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U2]], i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 4, i32 4, i1 false)
     82   GUID s1_2 = __uuidof(S1);
     83 
     84   // CHECK-DEFINE-GUID: [[U3:%.+]] = bitcast %struct._GUID* %s1_3 to i8*
     85   // CHECK-DEFINE-WRONG-GUID: [[U3:%.+]] = bitcast %struct._GUID* %s1_3 to i8*
     86   // CHECK-DEFINE-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U3]], i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 16, i32 4, i1 false)
     87   // CHECK-DEFINE-WRONG-GUID: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U3]], i8* bitcast ({ i32, i16, i16, [8 x i8] }* @_GUID_12345678_1234_1234_1234_1234567890ab to i8*), i32 4, i32 4, i1 false)
     88   GUID s1_3 = __uuidof(s1);
     89 }
     90 #endif
     91 
     92 void gun() {
     93 #ifdef DEFINE_GUID
     94   // CHECK-DEFINE-GUID: %s2_1 = alloca %struct._GUID, align 4
     95   // CHECK-DEFINE-WRONG-GUID: %s2_1 = alloca %struct._GUID, align 4
     96   // CHECK-DEFINE-GUID: %s2_2 = alloca %struct._GUID, align 4
     97   // CHECK-DEFINE-WRONG-GUID: %s2_2 = alloca %struct._GUID, align 4
     98   GUID s2_1 = __uuidof(S2);
     99   GUID s2_2 = __uuidof(S2);
    100 #endif
    101   // CHECK: %r = alloca %struct._GUID*, align 4
    102   // CHECK: %p = alloca %struct._GUID*, align 4
    103   // CHECK: %zeroiid = alloca %struct._GUID*, align 4
    104 
    105   // 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
    106   const GUID& r = __uuidof(S2);
    107   // 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
    108   const GUID* p = &__uuidof(S2);
    109 
    110   // Special case _uuidof(0), local scope version.
    111   // 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
    112   const GUID& zeroiid = __uuidof(0);
    113 }
    114