1 // RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-win32 -fms-extensions | FileCheck %s 2 3 typedef struct _GUID 4 { 5 unsigned long Data1; 6 unsigned short Data2; 7 unsigned short Data3; 8 unsigned char Data4[8]; 9 } GUID; 10 11 struct __declspec(uuid("12345678-1234-1234-1234-1234567890ab")) S1 { } s1; 12 struct __declspec(uuid("87654321-4321-4321-4321-ba0987654321")) S2 { }; 13 14 // This gets initialized in a static initializer. 15 // CHECK: @g = global %struct._GUID zeroinitializer, align 4 16 GUID g = __uuidof(S1); 17 18 // First global use of __uuidof(S1) forces the creation of the global. 19 // CHECK: @__uuid_12345678-1234-1234-1234-1234567890ab = private unnamed_addr constant %struct._GUID { i32 305419896, i16 4660, i16 4660, [8 x i8] c"\124\124Vx\90\AB" } 20 // CHECK: @gr = constant %struct._GUID* @__uuid_12345678-1234-1234-1234-1234567890ab, align 4 21 const GUID& gr = __uuidof(S1); 22 23 // CHECK: @gp = global %struct._GUID* @__uuid_12345678-1234-1234-1234-1234567890ab, align 4 24 const GUID* gp = &__uuidof(S1); 25 26 // Special case: _uuidof(0) 27 // CHECK: @zeroiid = constant %struct._GUID* @__uuid_00000000-0000-0000-0000-000000000000, align 4 28 const GUID& zeroiid = __uuidof(0); 29 30 // __uuidof(S2) hasn't been used globally yet, so it's emitted when it's used 31 // in a function and is emitted at the end of the globals section. 32 // CHECK: @__uuid_87654321-4321-4321-4321-ba0987654321 = private unnamed_addr constant %struct._GUID { i32 -2023406815, i16 17185, i16 17185, [8 x i8] c"C!\BA\09\87eC!" } 33 34 // The static initializer for g. 35 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* bitcast (%struct._GUID* @g to i8*), i8* bitcast (%struct._GUID* @__uuid_12345678-1234-1234-1234-1234567890ab to i8*), i32 16, i32 4, i1 false) 36 37 void fun() { 38 // CHECK: %s1_1 = alloca %struct._GUID, align 4 39 // CHECK: %s1_2 = alloca %struct._GUID, align 4 40 // CHECK: %s1_3 = alloca %struct._GUID, align 4 41 42 // CHECK: [[U1:%.+]] = bitcast %struct._GUID* %s1_1 to i8* 43 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U1]], i8* bitcast (%struct._GUID* @__uuid_12345678-1234-1234-1234-1234567890ab to i8*), i32 16, i32 4, i1 false) 44 GUID s1_1 = __uuidof(S1); 45 46 // CHECK: [[U2:%.+]] = bitcast %struct._GUID* %s1_2 to i8* 47 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U2]], i8* bitcast (%struct._GUID* @__uuid_12345678-1234-1234-1234-1234567890ab to i8*), i32 16, i32 4, i1 false) 48 GUID s1_2 = __uuidof(S1); 49 50 // CHECK: [[U3:%.+]] = bitcast %struct._GUID* %s1_3 to i8* 51 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* [[U3]], i8* bitcast (%struct._GUID* @__uuid_12345678-1234-1234-1234-1234567890ab to i8*), i32 16, i32 4, i1 false) 52 GUID s1_3 = __uuidof(s1); 53 } 54 55 void gun() { 56 // CHECK: %s2_1 = alloca %struct._GUID, align 4 57 // CHECK: %s2_2 = alloca %struct._GUID, align 4 58 // CHECK: %r = alloca %struct._GUID*, align 4 59 // CHECK: %p = alloca %struct._GUID*, align 4 60 // CHECK: %zeroiid = alloca %struct._GUID*, align 4 61 GUID s2_1 = __uuidof(S2); 62 GUID s2_2 = __uuidof(S2); 63 64 // CHECK: store %struct._GUID* @__uuid_87654321-4321-4321-4321-ba0987654321, %struct._GUID** %r, align 4 65 const GUID& r = __uuidof(S2); 66 // CHECK: store %struct._GUID* @__uuid_87654321-4321-4321-4321-ba0987654321, %struct._GUID** %p, align 4 67 const GUID* p = &__uuidof(S2); 68 69 // Special case _uuidof(0), local scope version. 70 // CHECK: store %struct._GUID* @__uuid_00000000-0000-0000-0000-000000000000, %struct._GUID** %zeroiid, align 4 71 const GUID& zeroiid = __uuidof(0); 72 } 73
