clang/test/CodeGenCXX/pr20897.cpp

   1 // RUN: %clang_cc1 -triple i686-windows-msvc -fms-extensions -emit-llvm -std=c++1y -O0 -o - %s | FileCheck %s
   2 struct Base {};
   3
   4 // __declspec(dllexport) causes us to export the implicit constructor.
   5 struct __declspec(dllexport) Derived : virtual Base {
   6 // CHECK-LABEL: define weak_odr dso_local dllexport x86_thiscallcc noundef %struct.Derived* @"??0Derived@@QAE@ABU0@@Z"
   7 // CHECK:      %[[this:.*]] = load %struct.Derived*, %struct.Derived** {{.*}}
   8 // CHECK-NEXT: store %struct.Derived* %[[this]], %struct.Derived** %[[retval:.*]]
   9 // CHECK:      %[[dest_a_gep:.*]] = getelementptr inbounds %struct.Derived, %struct.Derived* %[[this]], i32 0, i32 1
  10 // CHECK-NEXT: %[[src_load:.*]]   = load %struct.Derived*, %struct.Derived** {{.*}}
  11 // CHECK-NEXT: %[[src_a_gep:.*]]  = getelementptr inbounds %struct.Derived, %struct.Derived* %[[src_load:.*]], i32 0, i32 1
  12 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %[[dest_a_gep]], i8* align 4 %[[src_a_gep]], i64 1, i1 false)
  13 // CHECK-NEXT: %[[dest_this:.*]] = load %struct.Derived*, %struct.Derived** %[[retval]]
  14 // CHECK-NEXT: ret %struct.Derived* %[[dest_this]]
  15   bool a : 1;
  16   bool b : 1;
  17 };
  18
  19 // __declspec(dllexport) causes us to export the implicit copy constructor.
  20 struct __declspec(dllexport) Derived2 : virtual Base {
  21 // CHECK-LABEL: define weak_odr dso_local dllexport x86_thiscallcc noundef %struct.Derived2* @"??0Derived2@@QAE@ABU0@@Z"
  22 // CHECK:      %[[this:.*]] = load %struct.Derived2*, %struct.Derived2** {{.*}}
  23 // CHECK-NEXT: store %struct.Derived2* %[[this]], %struct.Derived2** %[[retval:.*]]
  24 // CHECK:      %[[dest_a_gep:.*]] = getelementptr inbounds %struct.Derived2, %struct.Derived2* %[[this]], i32 0, i32 1
  25 // CHECK-NEXT: %[[src_load:.*]]   = load %struct.Derived2*, %struct.Derived2** {{.*}}
  26 // CHECK-NEXT: %[[src_a_gep:.*]]  = getelementptr inbounds %struct.Derived2, %struct.Derived2* %[[src_load:.*]], i32 0, i32 1
  27 // CHECK-NEXT: %[[dest_a_bitcast:.*]]  = bitcast [1 x i32]* %[[dest_a_gep]] to i8*
  28 // CHECK-NEXT: %[[src_a_bitcast:.*]] = bitcast [1 x i32]* %[[src_a_gep]] to i8*
  29 // CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %[[dest_a_bitcast]], i8* align 4 %[[src_a_bitcast]], i32 4, i1 false)
  30 // CHECK-NEXT: %[[dest_this:.*]] = load %struct.Derived2*, %struct.Derived2** %[[retval]]
  31 // CHECK-NEXT: ret %struct.Derived2* %[[dest_this]]
  32   int Array[1];
  33 };