clang/test/CodeGenCXX/mangle-nttp-anon-union.cpp

   1 // RUN: %clang_cc1 -std=c++20 -fclang-abi-compat=latest -emit-llvm %s -o - -triple=x86_64-linux-gnu | FileCheck %s
   2 // RUN: %clang_cc1 -std=c++20 -fclang-abi-compat=latest -emit-llvm %s -o - -triple=x86_64-linux-gnu | llvm-cxxfilt -n | FileCheck %s --check-prefix DEMANGLED
   3
   4 template<typename T>
   5 struct wrapper1 {
   6   union {
   7     struct {
   8       T RightName;
   9     };
  10   };
  11 };
  12
  13 template<typename T>
  14 struct wrapper2 {
  15   union {
  16     struct {
  17       T RightName;
  18     };
  19     T WrongName;
  20   };
  21 };
  22
  23 struct Base {
  24   int WrongName;
  25 };
  26
  27 template <typename T>
  28 struct wrapper3 {
  29   union {
  30     struct : Base {
  31       T RightName; };
  32     T WrongName;
  33   };
  34 };
  35
  36 template <typename T>
  37 struct wrapper4 {
  38   union {
  39     int RightName;
  40     struct {
  41       T WrongName;
  42     };
  43     T AlsoWrongName;
  44   };
  45 };
  46
  47 template <typename T>
  48 struct wrapper5 {
  49   union {
  50     struct {
  51       struct {
  52         T RightName;
  53       };
  54       T WrongName;
  55     };
  56   };
  57 };
  58
  59 template<typename T>
  60 struct wrapper6 {
  61   union {
  62     union{
  63     int : 5;
  64     T RightName;
  65     };
  66   };
  67 };
  68
  69
  70
  71 template<auto tparam> void dummy(){}
  72
  73
  74 void uses() {
  75   // Zero init'ed cases.
  76   dummy<wrapper1<int>{}>();
  77   // CHECK: call void @_Z5dummyITnDaXtl8wrapper1IiEEEEvv
  78   // DEMANGLED: call void @void dummy<wrapper1<int>{}>()()
  79   dummy<wrapper2<float>{}>();
  80   // CHECK: call void @_Z5dummyITnDaXtl8wrapper2IfEEEEvv
  81   // DEMANGLED: call void @void dummy<wrapper2<float>{}>()()
  82   dummy<wrapper3<short>{}>();
  83   // CHECK: call void @_Z5dummyITnDaXtl8wrapper3IsEEEEvv
  84   // DEMANGLED: call void @void dummy<wrapper3<short>{}>()()
  85   dummy<wrapper4<double>{}>();
  86   // CHECK: call void @_Z5dummyITnDaXtl8wrapper4IdEEEEvv
  87   // DEMANGLED: call void @void dummy<wrapper4<double>{}>()()
  88   dummy<wrapper5<long long>{}>();
  89   // CHECK: call void @_Z5dummyITnDaXtl8wrapper5IxEEEEvv
  90   // DEMANGLED: call void @void dummy<wrapper5<long long>{}>()()
  91   dummy<wrapper6<int>{}>();
  92   // CHECK: call void @_Z5dummyITnDaXtl8wrapper6IiEEEEvv
  93   // DEMANGLED: call void @void dummy<wrapper6<int>{}>()()
  94
  95   dummy<wrapper1<double>{123.0}>();
  96   // CHECK: call void @_Z5dummyITnDaXtl8wrapper1IdEtlNS1_Ut_Edi9RightNametlNS2_Ut_ELd405ec00000000000EEEEEEvv
  97   // DEMANGLED: call void @void dummy<wrapper1<double>{wrapper1<double>::'unnamed'{.RightName = wrapper1<double>::'unnamed'::'unnamed'{0x1.ec{{.*}}p+6}}}>()()
  98   dummy<wrapper2<double>{123.0}>();
  99   // CHECK: call void @_Z5dummyITnDaXtl8wrapper2IdEtlNS1_Ut_Edi9RightNametlNS2_Ut_ELd405ec00000000000EEEEEEvv
 100   // DEMANGLED: call void @void dummy<wrapper2<double>{wrapper2<double>::'unnamed'{.RightName = wrapper2<double>::'unnamed'::'unnamed'{0x1.ec{{.*}}p+6}}}>()()
 101   dummy<wrapper3<double>{123, 456}>();
 102   // CHECK: call void @_Z5dummyITnDaXtl8wrapper3IdEtlNS1_Ut_Edi9RightNametlNS2_Ut_Etl4BaseLi123EELd407c800000000000EEEEEEvv
 103   // DEMANGLED: call void @void dummy<wrapper3<double>{wrapper3<double>::'unnamed'{.RightName = wrapper3<double>::'unnamed'::'unnamed'{Base{123}, 0x1.c8{{.*}}p+8}}}>()()
 104   dummy<wrapper4<double>{123}>();
 105   // CHECK: call void @_Z5dummyITnDaXtl8wrapper4IdEtlNS1_Ut_Edi9RightNameLi123EEEEEvv
 106   // DEMANGLED: call void @void dummy<wrapper4<double>{wrapper4<double>::'unnamed'{.RightName = 123}}>()()
 107   dummy<wrapper5<double>{123.0, 456.0}>();
 108   // CHECK: call void @_Z5dummyITnDaXtl8wrapper5IdEtlNS1_Ut_Edi9RightNametlNS2_Ut_EtlNS3_Ut_ELd405ec00000000000EELd407c800000000000EEEEEEvv
 109   // DEMANGLED: call void @void dummy<wrapper5<double>{wrapper5<double>::'unnamed'{.RightName = wrapper5<double>::'unnamed'::'unnamed'{wrapper5<double>::'unnamed'::'unnamed'::'unnamed'{0x1.ec{{.*}}p+6}, 0x1.c8{{.*}}p+8}}}>()()
 110   dummy<wrapper6<double>{1}>();
 111   // CHECK: call void @_Z5dummyITnDaXtl8wrapper6IdEtlNS1_Ut_Edi9RightNametlNS2_Ut_Edi9RightNameLd3ff0000000000000EEEEEEvv
 112   // DEMANGELD: call void @void dummy<wrapper6<double>{wrapper6<double>::'unnamed'{.RightName = wrapper6<double>::'unnamed'::'unnamed'{.RightName = 0x1{{.*}}p+0}}}>()()
 113 }