cb92c19fc4
This produces comdats for vtables, typeinfo, typeinfo names, and vtts. When combined with llvm not producing implicit comdats, not doing this would cause code bloat on ELF and link errors on COFF. llvm-svn: 226227
206 lines
6.0 KiB
C++
206 lines
6.0 KiB
C++
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux -emit-llvm -o %t
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// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -disable-llvm-optzns -O3 -emit-llvm -o %t.opt
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// RUN: FileCheck --check-prefix=CHECK %s < %t
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// RUN: FileCheck --check-prefix=CHECK-OPT %s < %t.opt
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namespace {
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struct A {
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virtual void f() { }
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};
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}
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void f() { A b; }
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struct B {
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B();
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virtual void f();
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};
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B::B() { }
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struct C : virtual B {
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C();
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virtual void f() { }
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};
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C::C() { }
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struct D {
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virtual void f();
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};
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void D::f() { }
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static struct : D { } e;
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// The destructor is the key function.
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template<typename T>
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struct E {
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virtual ~E();
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};
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template<typename T> E<T>::~E() { }
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// Anchor is the key function
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template<>
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struct E<char> {
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virtual void anchor();
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};
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void E<char>::anchor() { }
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template struct E<short>;
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extern template struct E<int>;
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void use_E() {
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E<int> ei;
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(void)ei;
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E<long> el;
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(void)el;
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}
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// No key function
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template<typename T>
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struct F {
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virtual void foo() { }
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};
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// No key function
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template<>
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struct F<char> {
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virtual void foo() { }
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};
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template struct F<short>;
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extern template struct F<int>;
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void use_F() {
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F<char> fc;
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fc.foo();
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F<int> fi;
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fi.foo();
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F<long> fl;
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(void)fl;
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}
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// B has a key function that is not defined in this translation unit so its vtable
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// has external linkage.
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// CHECK-DAG: @_ZTV1B = external unnamed_addr constant
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// C has no key function, so its vtable should have weak_odr linkage
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// and hidden visibility (rdar://problem/7523229).
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// CHECK-DAG: @_ZTV1C = linkonce_odr unnamed_addr constant {{.*}}, comdat,
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// CHECK-DAG: @_ZTS1C = linkonce_odr constant {{.*}}, comdat{{$}}
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// CHECK-DAG: @_ZTI1C = linkonce_odr constant {{.*}}, comdat{{$}}
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// CHECK-DAG: @_ZTT1C = linkonce_odr unnamed_addr constant {{.*}}, comdat{{$}}
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// D has a key function that is defined in this translation unit so its vtable is
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// defined in the translation unit.
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// CHECK-DAG: @_ZTV1D = unnamed_addr constant
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// CHECK-DAG: @_ZTS1D = constant
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// CHECK-DAG: @_ZTI1D = constant
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// E<char> is an explicit specialization with a key function defined
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// in this translation unit, so its vtable should have external
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// linkage.
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// CHECK-DAG: @_ZTV1EIcE = unnamed_addr constant
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// CHECK-DAG: @_ZTS1EIcE = constant
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// CHECK-DAG: @_ZTI1EIcE = constant
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// E<short> is an explicit template instantiation with a key function
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// defined in this translation unit, so its vtable should have
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// weak_odr linkage.
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// CHECK-DAG: @_ZTV1EIsE = weak_odr unnamed_addr constant {{.*}}, comdat,
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// CHECK-DAG: @_ZTS1EIsE = weak_odr constant {{.*}}, comdat{{$}}
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// CHECK-DAG: @_ZTI1EIsE = weak_odr constant {{.*}}, comdat{{$}}
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// F<short> is an explicit template instantiation without a key
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// function, so its vtable should have weak_odr linkage
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// CHECK-DAG: @_ZTV1FIsE = weak_odr unnamed_addr constant {{.*}}, comdat,
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// CHECK-DAG: @_ZTS1FIsE = weak_odr constant {{.*}}, comdat{{$}}
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// CHECK-DAG: @_ZTI1FIsE = weak_odr constant {{.*}}, comdat{{$}}
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// E<long> is an implicit template instantiation with a key function
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// defined in this translation unit, so its vtable should have
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// linkonce_odr linkage.
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// CHECK-DAG: @_ZTV1EIlE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
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// CHECK-DAG: @_ZTS1EIlE = linkonce_odr constant {{.*}}, comdat{{$}}
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// CHECK-DAG: @_ZTI1EIlE = linkonce_odr constant {{.*}}, comdat{{$}}
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// F<long> is an implicit template instantiation with no key function,
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// so its vtable should have linkonce_odr linkage.
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// CHECK-DAG: @_ZTV1FIlE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
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// CHECK-DAG: @_ZTS1FIlE = linkonce_odr constant {{.*}}, comdat{{$}}
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// CHECK-DAG: @_ZTI1FIlE = linkonce_odr constant {{.*}}, comdat{{$}}
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// F<int> is an explicit template instantiation declaration without a
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// key function, so its vtable should have external linkage.
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// CHECK-DAG: @_ZTV1FIiE = external unnamed_addr constant
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// CHECK-OPT-DAG: @_ZTV1FIiE = external unnamed_addr constant
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// E<int> is an explicit template instantiation declaration. It has a
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// key function that is not instantiated, so we should only reference
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// its vtable, not define it.
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// CHECK-DAG: @_ZTV1EIiE = external unnamed_addr constant
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// CHECK-OPT-DAG: @_ZTV1EIiE = external unnamed_addr constant
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// The anonymous struct for e has no linkage, so the vtable should have
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// internal linkage.
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// CHECK-DAG: @"_ZTV3$_0" = internal unnamed_addr constant
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// CHECK-DAG: @"_ZTS3$_0" = internal constant
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// CHECK-DAG: @"_ZTI3$_0" = internal constant
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// The A vtable should have internal linkage since it is inside an anonymous
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// namespace.
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// CHECK-DAG: @_ZTVN12_GLOBAL__N_11AE = internal unnamed_addr constant
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// CHECK-DAG: @_ZTSN12_GLOBAL__N_11AE = internal constant
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// CHECK-DAG: @_ZTIN12_GLOBAL__N_11AE = internal constant
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// F<char> is an explicit specialization without a key function, so
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// its vtable should have linkonce_odr linkage.
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// CHECK-DAG: @_ZTV1FIcE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
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// CHECK-DAG: @_ZTS1FIcE = linkonce_odr constant {{.*}}, comdat{{$}}
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// CHECK-DAG: @_ZTI1FIcE = linkonce_odr constant {{.*}}, comdat{{$}}
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// CHECK-DAG: @_ZTV1GIiE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
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template <typename T>
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class G {
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public:
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G() {}
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virtual void f0();
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virtual void f1();
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};
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template <>
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void G<int>::f1() {}
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template <typename T>
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void G<T>::f0() {}
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void G_f0() { new G<int>(); }
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// H<int> has a key function without a body but it's a template instantiation
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// so its VTable must be emitted.
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// CHECK-DAG: @_ZTV1HIiE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
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template <typename T>
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class H {
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public:
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virtual ~H();
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};
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void use_H() {
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H<int> h;
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}
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// I<int> has an explicit instantiation declaration and needs a VTT and
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// construction vtables.
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// CHECK-DAG: @_ZTV1IIiE = external unnamed_addr constant
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// CHECK-DAG: @_ZTT1IIiE = external unnamed_addr constant
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// CHECK-NOT: @_ZTC1IIiE
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//
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// CHECK-OPT-DAG: @_ZTV1IIiE = external unnamed_addr constant
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// CHECK-OPT-DAG: @_ZTT1IIiE = external unnamed_addr constant
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struct VBase1 { virtual void f(); }; struct VBase2 : virtual VBase1 {};
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template<typename T>
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struct I : VBase2 {};
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extern template struct I<int>;
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I<int> i;
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