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0a6096bab2
GCC does not mangle it when it is not explicit in the source. The mangler as currently written cannot differentiate between explicit and implicit calling conventions, so we can't match GCC. Explicit thiscall conventions are rare, so mangle as if the convention was implicit to be as ABI compatible as possible. Also fixes some tests using %itanium_abi_triple in some configurations as a side effect. Fixes PR40107. llvm-svn: 349872
71 lines
3.6 KiB
C++
71 lines
3.6 KiB
C++
// 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)* %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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