clang/test/CodeGenCXX/mangle-win-ccs.cpp

   1 // RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-gnu -o - | FileCheck %s
   2 // RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-itanium -o - | FileCheck %s
   3
   4 // GCC 5.1 began mangling these Windows calling conventions into function
   5 // types, since they can be used for overloading. They've always been mangled
   6 // in the MS ABI, but they are new to the Itanium mangler. Note that the main
   7 // function definition does not use a calling convention. Only function types
   8 // that appear later use it.
   9
  10 template <typename Fn> static int func_as_ptr(Fn fn) { return int(fn); }
  11
  12 void f_cdecl(int, int);
  13 void __attribute__((stdcall)) f_stdcall(int, int);
  14 void __attribute__((fastcall)) f_fastcall(int, int);
  15 void __attribute__((thiscall)) f_thiscall(int, int);
  16
  17 int as_cdecl() { return func_as_ptr(f_cdecl); }
  18 int as_stdcall() { return func_as_ptr(f_stdcall); }
  19 int as_fastcall() { return func_as_ptr(f_fastcall); }
  20
  21 // CHECK: define dso_local noundef i32 @_Z8as_cdeclv()
  22 // CHECK:   call noundef i32 @_ZL11func_as_ptrIPFviiEEiT_(void (i32, i32)* noundef @_Z7f_cdeclii)
  23
  24 // CHECK: define dso_local noundef i32 @_Z10as_stdcallv()
  25 // CHECK:   call noundef i32 @_ZL11func_as_ptrIPU7stdcallFviiEEiT_(void (i32, i32)* noundef @"\01__Z9f_stdcallii@8")
  26
  27 // CHECK: define dso_local noundef i32 @_Z11as_fastcallv()
  28 // CHECK:   call noundef i32 @_ZL11func_as_ptrIPU8fastcallFviiEEiT_(void (i32, i32)* noundef @"\01@_Z10f_fastcallii@8")
  29
  30 // PR40107: We should mangle thiscall here but we don't because we can't
  31 // disambiguate it from the member pointer case below where it shouldn't be
  32 // mangled.
  33 //int as_thiscall() { return func_as_ptr(f_thiscall); }
  34 // CHECKX: define dso_local i32 @_Z11as_thiscallv()
  35 // CHECKX:   call i32 @_ZL11func_as_ptrIPU8thiscallFviiEEiT_(void (i32, i32)* @_Z10f_thiscallii)
  36
  37 // CHECK: define dso_local void @_Z11funcRefTypeRU8fastcallFviiE(void (i32, i32)* noundef nonnull %fr)
  38 void funcRefType(void(__attribute__((fastcall)) & fr)(int, int)) {
  39   fr(1, 2);
  40 }
  41
  42 struct Foo { void bar(int, int); };
  43
  44 // PR40107: In this case, the member function pointer uses the thiscall
  45 // convention, but GCC doesn't mangle it, so we don't either.
  46 // CHECK: define dso_local void @_Z15memptr_thiscallP3FooMS_FvvE(%struct.Foo* {{.*}})
  47 void memptr_thiscall(Foo *o, void (Foo::*mp)()) { (o->*mp)(); }
  48
  49 // CHECK: define dso_local void @_Z12memptrCCTypeR3FooMS_U8fastcallFviiE(%struct.Foo* {{.*}}, { i32, i32 }* noundef byval{{.*}})
  50 void memptrCCType(Foo &o, void (__attribute__((fastcall)) Foo::*mp)(int, int)) {
  51   (o.*mp)(1, 2);
  52 }
  53
  54 // CHECK: define dso_local noundef i32 @_Z17useTemplateFnTypev()
  55 // CHECK:   call noundef i32 @_ZL14templateFnTypeIU8fastcallFviiEElPT_(void (i32, i32)* noundef @"\01@_Z10f_fastcallii@8")
  56 template <typename Fn> static long templateFnType(Fn *fn) { return long(fn); }
  57 long useTemplateFnType() { return templateFnType(f_fastcall); }
  58
  59 // CHECK: define weak_odr dso_local x86_fastcallcc void @"\01@_Z10fnTemplateIsEvv@0"()
  60 // CHECK: define          dso_local x86_fastcallcc void @"\01@_Z10fnTemplateIiEvv@0"()
  61 template <typename T> void __attribute__((fastcall)) fnTemplate() {}
  62 template void __attribute__((fastcall)) fnTemplate<short>();
  63 template <> void __attribute__((fastcall)) fnTemplate<int>() {}
  64
  65 // CHECK: define weak_odr dso_local x86_fastcallcc noundef void (i32, i32)* @"\01@_Z12fnTempReturnIsEPU8fastcallFviiEv@0"()
  66 // CHECK: define          dso_local x86_fastcallcc noundef void (i32, i32)* @"\01@_Z12fnTempReturnIiEPU8fastcallFviiEv@0"()
  67 typedef void (__attribute__((fastcall)) *fp_cc_t)(int, int);
  68 template <typename T> fp_cc_t __attribute__((fastcall)) fnTempReturn() { return nullptr; }
  69 template fp_cc_t __attribute__((fastcall)) fnTempReturn<short>();
  70 template <> fp_cc_t __attribute__((fastcall)) fnTempReturn<int>() { return nullptr; }