clang/test/CodeGenCXX/dllimport-runtime-fns.cpp

   1 // RUN: %clang_cc1 -fms-extensions -fms-compatibility-version=19.20 -triple x86_64-windows-msvc -fexceptions -fcxx-exceptions -emit-llvm -o - %s | FileCheck %s --check-prefix=MSVC
   2 // RUN: %clang_cc1 -fms-extensions -fms-compatibility-version=19.20 -triple aarch64-windows-msvc -fexceptions -fcxx-exceptions -emit-llvm -o - %s | FileCheck %s --check-prefix=MSVC
   3 // RUN: %clang_cc1 -triple x86_64-windows-itanium -fexceptions -fcxx-exceptions -emit-llvm -o - %s | FileCheck %s --check-prefix=ITANIUM
   4 // RUN: %clang_cc1 -triple aarch64-windows-gnu -fexceptions -fcxx-exceptions -emit-llvm -o - %s | FileCheck %s --check-prefix=GNU
   5
   6 void foo1() { throw 1; }
   7 // _CxxThrowException should not be marked dllimport.
   8 // MSVC-LABEL: define dso_local void @"?foo1@@YAXXZ"
   9 // MSVC: call void @_CxxThrowException
  10 // MSVC: declare dso_local void @_CxxThrowException(ptr, ptr)
  11
  12 // __cxa_throw should be marked dllimport for *-windows-itanium.
  13 // ITANIUM-LABEL: define dso_local void @_Z4foo1v()
  14 // ITANIUM: call void @__cxa_throw({{.*}})
  15 // ITANIUM: declare dllimport void @__cxa_throw({{.*}})
  16
  17 // ... but not for *-windows-gnu.
  18 // GNU-LABEL: define dso_local void @_Z4foo1v()
  19 // GNU: call void @__cxa_throw({{.*}})
  20 // GNU: declare dso_local void @__cxa_throw({{.*}})
  21
  22
  23 void bar();
  24 void foo2() noexcept(true) { bar(); }
  25 // __std_terminate should not be marked dllimport.
  26 // MSVC-LABEL: define dso_local void @"?foo2@@YAXXZ"
  27 // MSVC: call void @__std_terminate()
  28 // MSVC: declare dso_local void @__std_terminate()
  29
  30 // _ZSt9terminatev and __cxa_begin_catch should be marked dllimport.
  31 // ITANIUM-LABEL: define linkonce_odr hidden void @__clang_call_terminate(ptr noundef %0)
  32 // ITANIUM: call ptr @__cxa_begin_catch({{.*}})
  33 // ITANIUM: call void @_ZSt9terminatev()
  34 // ITANIUM: declare dllimport ptr @__cxa_begin_catch(ptr)
  35 // ITANIUM: declare dllimport void @_ZSt9terminatev()
  36
  37 // .. not for mingw.
  38 // GNU-LABEL: define linkonce_odr hidden void @__clang_call_terminate(ptr noundef %0)
  39 // GNU: call ptr @__cxa_begin_catch({{.*}})
  40 // GNU: call void @_ZSt9terminatev()
  41 // GNU: declare dso_local ptr @__cxa_begin_catch(ptr)
  42 // GNU: declare dso_local void @_ZSt9terminatev()
  43
  44
  45 struct A {};
  46 struct B { virtual void f(); };
  47 struct C : A, virtual B {};
  48 struct T {};
  49 T *foo3() { return dynamic_cast<T *>((C *)0); }
  50 // __RTDynamicCast should not be marked dllimport.
  51 // MSVC-LABEL: define dso_local noundef ptr @"?foo3@@YAPEAUT@@XZ"
  52 // MSVC: call ptr @__RTDynamicCast({{.*}})
  53 // MSVC: declare dso_local ptr @__RTDynamicCast(ptr, i32, ptr, ptr, i32)
  54
  55 // Again, imported
  56 // ITANIUM-LABEL: define dso_local noundef ptr @_Z4foo3v()
  57 // ITANIUM: call ptr @__dynamic_cast({{.*}})
  58 // ITANIUM: declare dllimport ptr @__dynamic_cast({{.*}})
  59
  60 // Not imported
  61 // GNU-LABEL: define dso_local noundef ptr @_Z4foo3v()
  62 // GNU: call ptr @__dynamic_cast({{.*}})
  63 // GNU: declare dso_local ptr @__dynamic_cast({{.*}})