forked from OSchip/llvm-project
206 lines
6.5 KiB
C++
206 lines
6.5 KiB
C++
// RUN: %clang_cc1 %s -O1 -disable-llvm-passes -triple=x86_64-apple-darwin10 -std=c++11 -emit-llvm -o - | FileCheck %s
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// RUN: %clang_cc1 %s -O1 -disable-llvm-passes -triple=x86_64-apple-darwin10 -std=c++11 -emit-llvm -o - | FileCheck %s --check-prefix=CHECK2
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// Instantiation order varies on different C++ dialects (IE, between C++98 and C++11).
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// CHECK-DAG: @_ZN7PR100011xE = global
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// CHECK-DAG: @_ZTVN5test018stdio_sync_filebufIA3_iEE = weak_odr unnamed_addr constant
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// CHECK-DAG: @_ZN7PR100011SIiE3arrE = linkonce_odr global [3 x i32]
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// CHECK-DAG: @_ZTVN5test018stdio_sync_filebufIA4_iEE = linkonce_odr unnamed_addr constant
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// Negative checks go under prefix "CHECK2" to avoid interference with CHECK and CHECK-DAG.
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// CHECK2-NOT: @_ZN7PR100014kBarE = external global i32
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// CHECK2-NOT: @_ZTVN5test118stdio_sync_filebufIwEE = constant
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// CHECK2-NOT: _ZTVN5test315basic_fstreamXXIcEE
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// CHECK2-NOT: @_ZTVN5test018stdio_sync_filebufIA1_iEE
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// CHECK2-NOT: @_ZTVN5test018stdio_sync_filebufIA2_iEE
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// CHECK2-NOT: @_ZN7PR100011SIiE3arr2E = linkonce_odr global [3 x i32]A
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// CHECK2-NOT: _ZTVN5test31SIiEE
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// CHECK2-NOT: _ZTSN5test31SIiEE
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// CHECK-LABEL: define linkonce_odr void @_ZN5test21CIiEC1Ev(%"class.test2::C"* %this) unnamed_addr
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// CHECK-LABEL: define linkonce_odr void @_ZN5test21CIiE6foobarIdEEvT_(
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// CHECK-LABEL: define available_externally void @_ZN5test21CIiE6zedbarEd(
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// CHECK-LABEL: define linkonce_odr void @_ZN7PR106662g1ENS_1SILi1EEE()
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// CHECK-LABEL: define linkonce_odr void @_ZN7PR106662g1ENS_1SILi2EEE()
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// CHECK-LABEL: define linkonce_odr void @_ZN7PR106662g1ENS_1SILi3EEE()
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// CHECK-LABEL: define linkonce_odr void @_ZN7PR106662g2ENS_1SILi1EEE()
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// CHECK-LABEL: define linkonce_odr void @_ZN7PR106662g2ENS_1SILi2EEE()
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// CHECK-LABEL: define linkonce_odr void @_ZN7PR106662g2ENS_1SILi3EEE()
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// CHECK: declare void @_ZN7PR106662h1ENS_1SILi1EEE()
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// CHECK: declare void @_ZN7PR106662h1ENS_1SILi2EEE()
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// CHECK: declare void @_ZN7PR106662h1ENS_1SILi3EEE()
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// CHECK: declare void @_ZN7PR106662h2ENS_1SILi1EEE()
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// CHECK: declare void @_ZN7PR106662h2ENS_1SILi2EEE()
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// CHECK: declare void @_ZN7PR106662h2ENS_1SILi3EEE()
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namespace test0 {
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struct basic_streambuf {
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virtual ~basic_streambuf();
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};
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template<typename _CharT >
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struct stdio_sync_filebuf : public basic_streambuf {
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virtual void xsgetn();
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};
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// This specialization is not a key function, so doesn't cause the vtable to
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// be instantiated unless we're instantiating a class definition anyway.
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template<> void stdio_sync_filebuf<int[1]>::xsgetn() {
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}
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template<> void stdio_sync_filebuf<int[2]>::xsgetn() {
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}
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template<> void stdio_sync_filebuf<int[3]>::xsgetn() {
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}
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template<> void stdio_sync_filebuf<int[4]>::xsgetn() {
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}
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extern template class stdio_sync_filebuf<int[2]>;
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// These two both cause vtables to be emitted.
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template class stdio_sync_filebuf<int[3]>;
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stdio_sync_filebuf<int[4]> implicit_instantiation;
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}
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namespace test1 {
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struct basic_streambuf {
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virtual ~basic_streambuf();
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};
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template<typename _CharT >
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struct stdio_sync_filebuf : public basic_streambuf {
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virtual void xsgetn();
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};
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// Just a declaration should not force the vtable to be emitted.
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template<> void stdio_sync_filebuf<wchar_t>::xsgetn();
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}
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namespace test2 {
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template<typename T1>
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class C {
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public:
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virtual ~C();
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void zedbar(double) {
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}
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template<typename T2>
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void foobar(T2 foo) {
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}
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};
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extern template class C<int>;
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void g() {
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// The extern template declaration should not prevent us from producing
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// the implicit constructor (test at the top).
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C<int> a;
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// or foobar(test at the top).
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a.foobar(0.0);
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// But it should prevent zebbar
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// (test at the top).
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a.zedbar(0.0);
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}
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}
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namespace test3 {
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template<typename T>
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class basic_fstreamXX {
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virtual void foo(){}
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virtual void is_open() const { }
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};
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extern template class basic_fstreamXX<char>;
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// This template instantiation should not cause us to produce a vtable.
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// (test at the top).
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template void basic_fstreamXX<char>::is_open() const;
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}
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namespace test3 {
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template <typename T>
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struct S {
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virtual void m();
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};
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template<typename T>
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void S<T>::m() { }
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// Should not cause us to produce vtable because template instantiations
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// don't have key functions.
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template void S<int>::m();
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}
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namespace test4 {
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template <class T> struct A { static void foo(); };
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class B {
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template <class T> friend void A<T>::foo();
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B();
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};
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template <class T> void A<T>::foo() {
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B b;
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}
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unsigned test() {
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A<int>::foo();
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}
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}
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namespace PR8505 {
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// Hits an assertion due to bogus instantiation of class B.
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template <int i> class A {
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class B* g;
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};
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class B {
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void f () {}
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};
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// Should not instantiate class B since it is introduced in namespace scope.
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// CHECK2-NOT: _ZN6PR85051AILi0EE1B1fEv
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template class A<0>;
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}
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// Ensure that when instantiating initializers for static data members to
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// complete their type in an unevaluated context, we *do* emit initializers with
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// side-effects, but *don't* emit initializers and variables which are otherwise
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// unused in the program.
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namespace PR10001 {
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template <typename T> struct S {
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static const int arr[];
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static const int arr2[];
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static const int x, y;
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static int f();
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};
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extern int foo();
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extern int kBar;
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template <typename T> const int S<T>::arr[] = { 1, 2, foo() }; // possible side effects
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template <typename T> const int S<T>::arr2[] = { 1, 2, kBar }; // no side effects
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template <typename T> const int S<T>::x = sizeof(arr) / sizeof(arr[0]);
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template <typename T> const int S<T>::y = sizeof(arr2) / sizeof(arr2[0]);
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template <typename T> int S<T>::f() { return x + y; }
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int x = S<int>::f();
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}
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// Ensure that definitions are emitted for all friend functions defined within
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// class templates. Order of declaration is extremely important here. Different
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// instantiations of the class happen at different points during the deferred
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// method body parsing and afterward. Those different points of instantiation
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// change the exact form the class template appears to have.
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namespace PR10666 {
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template <int N> struct S {
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void f1() { S<1> s; }
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friend void g1(S s) {}
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friend void h1(S s);
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void f2() { S<2> s; }
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friend void g2(S s) {}
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friend void h2(S s);
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void f3() { S<3> s; }
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};
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void test(S<1> s1, S<2> s2, S<3> s3) {
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g1(s1); g1(s2); g1(s3);
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g2(s1); g2(s2); g2(s3);
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h1(s1); h1(s2); h1(s3);
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h2(s1); h2(s2); h2(s3);
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}
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}
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