71 lines
3.6 KiB
C++
71 lines
3.6 KiB
C++
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// RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-gnu -o - | FileCheck %s
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// RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-itanium -o - | FileCheck %s
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// GCC 5.1 began mangling these Windows calling conventions into function
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// types, since they can be used for overloading. They've always been mangled
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// in the MS ABI, but they are new to the Itanium mangler. Note that the main
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// function definition does not use a calling convention. Only function types
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// that appear later use it.
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template <typename Fn> static int func_as_ptr(Fn fn) { return int(fn); }
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void f_cdecl(int, int);
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void __attribute__((stdcall)) f_stdcall(int, int);
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void __attribute__((fastcall)) f_fastcall(int, int);
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void __attribute__((thiscall)) f_thiscall(int, int);
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int as_cdecl() { return func_as_ptr(f_cdecl); }
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int as_stdcall() { return func_as_ptr(f_stdcall); }
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int as_fastcall() { return func_as_ptr(f_fastcall); }
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// CHECK: define dso_local i32 @_Z8as_cdeclv()
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// CHECK: call i32 @_ZL11func_as_ptrIPFviiEEiT_(void (i32, i32)* @_Z7f_cdeclii)
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// CHECK: define dso_local i32 @_Z10as_stdcallv()
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// CHECK: call i32 @_ZL11func_as_ptrIPU7stdcallFviiEEiT_(void (i32, i32)* @"\01__Z9f_stdcallii@8")
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// CHECK: define dso_local i32 @_Z11as_fastcallv()
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// CHECK: call i32 @_ZL11func_as_ptrIPU8fastcallFviiEEiT_(void (i32, i32)* @"\01@_Z10f_fastcallii@8")
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// PR40107: We should mangle thiscall here but we don't because we can't
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// disambiguate it from the member pointer case below where it shouldn't be
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// mangled.
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//int as_thiscall() { return func_as_ptr(f_thiscall); }
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// CHECKX: define dso_local i32 @_Z11as_thiscallv()
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// CHECKX: call i32 @_ZL11func_as_ptrIPU8thiscallFviiEEiT_(void (i32, i32)* @_Z10f_thiscallii)
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// CHECK: define dso_local void @_Z11funcRefTypeRU8fastcallFviiE(void (i32, i32)* nonnull %fr)
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void funcRefType(void(__attribute__((fastcall)) & fr)(int, int)) {
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fr(1, 2);
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}
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struct Foo { void bar(int, int); };
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// PR40107: In this case, the member function pointer uses the thiscall
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// convention, but GCC doesn't mangle it, so we don't either.
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// CHECK: define dso_local void @_Z15memptr_thiscallP3FooMS_FvvE(%struct.Foo* {{.*}})
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void memptr_thiscall(Foo *o, void (Foo::*mp)()) { (o->*mp)(); }
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// CHECK: define dso_local void @_Z12memptrCCTypeR3FooMS_U8fastcallFviiE(%struct.Foo* {{.*}}, { i32, i32 }* byval{{.*}})
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void memptrCCType(Foo &o, void (__attribute__((fastcall)) Foo::*mp)(int, int)) {
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(o.*mp)(1, 2);
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}
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// CHECK: define dso_local i32 @_Z17useTemplateFnTypev()
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// CHECK: call i32 @_ZL14templateFnTypeIU8fastcallFviiEElPT_(void (i32, i32)* @"\01@_Z10f_fastcallii@8")
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template <typename Fn> static long templateFnType(Fn *fn) { return long(fn); }
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long useTemplateFnType() { return templateFnType(f_fastcall); }
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// CHECK: define weak_odr dso_local x86_fastcallcc void @"\01@_Z10fnTemplateIsEvv@0"()
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// CHECK: define dso_local x86_fastcallcc void @"\01@_Z10fnTemplateIiEvv@0"()
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template <typename T> void __attribute__((fastcall)) fnTemplate() {}
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template void __attribute__((fastcall)) fnTemplate<short>();
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template <> void __attribute__((fastcall)) fnTemplate<int>() {}
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// CHECK: define weak_odr dso_local x86_fastcallcc void (i32, i32)* @"\01@_Z12fnTempReturnIsEPU8fastcallFviiEv@0"()
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// CHECK: define dso_local x86_fastcallcc void (i32, i32)* @"\01@_Z12fnTempReturnIiEPU8fastcallFviiEv@0"()
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typedef void (__attribute__((fastcall)) *fp_cc_t)(int, int);
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template <typename T> fp_cc_t __attribute__((fastcall)) fnTempReturn() { return nullptr; }
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template fp_cc_t __attribute__((fastcall)) fnTempReturn<short>();
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template <> fp_cc_t __attribute__((fastcall)) fnTempReturn<int>() { return nullptr; }
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