The testcase in pr14929 shows that this is extremely hard to do. If we choose to apply the attribute, that causes the visibility of some decls to change and that can happen really late (during codegen). Current gcc warns and ignores the attribute in this testcase with a warning. This suggest that the correct solution is to find a point in the compilation where we can compute the visibility and * assert it was never computed before * reject any attempts to compute it again in the future (with warnings). llvm-svn: 172305
165 lines
3.6 KiB
C++
165 lines
3.6 KiB
C++
// RUN: %clang_cc1 -triple i386-unknown-unknown -std=c++11 -fvisibility-inlines-hidden -emit-llvm -o - %s -O2 -disable-llvm-optzns | FileCheck %s
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// The trickery with optimization in the run line is to get IR
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// generation to emit available_externally function bodies, but not
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// actually inline them (and thus remove the emitted bodies).
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struct X0 {
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void __attribute__((visibility("default"))) f1() { }
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void f2() { }
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void f3();
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static void f5() { }
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virtual void f6() { }
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};
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inline void X0::f3() { }
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template<typename T>
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struct X1 {
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void __attribute__((visibility("default"))) f1() { }
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void f2() { }
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void f3();
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void f4();
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static void f5() { }
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virtual void f6() { }
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};
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template<typename T>
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inline void X1<T>::f3() { }
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template<>
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inline void X1<int>::f4() { }
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struct __attribute__((visibility("default"))) X2 {
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void f2() { }
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};
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extern template struct X1<float>;
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void use(X0 *x0, X1<int> *x1, X2 *x2, X1<float> *x3) {
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// CHECK: define linkonce_odr void @_ZN2X02f1Ev
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x0->f1();
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// CHECK: define linkonce_odr hidden void @_ZN2X02f2Ev
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x0->f2();
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// CHECK: define linkonce_odr hidden void @_ZN2X02f3Ev
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x0->f3();
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// CHECK: define linkonce_odr hidden void @_ZN2X02f5Ev
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X0::f5();
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// CHECK: define linkonce_odr hidden void @_ZN2X02f6Ev
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x0->X0::f6();
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// CHECK: define linkonce_odr void @_ZN2X1IiE2f1Ev
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x1->f1();
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// CHECK: define linkonce_odr hidden void @_ZN2X1IiE2f2Ev
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x1->f2();
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// CHECK: define linkonce_odr hidden void @_ZN2X1IiE2f3Ev
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x1->f3();
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// CHECK: define linkonce_odr hidden void @_ZN2X1IiE2f4Ev
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x1->f4();
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// CHECK: define linkonce_odr hidden void @_ZN2X1IiE2f5Ev
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X1<int>::f5();
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// CHECK: define linkonce_odr hidden void @_ZN2X1IiE2f6Ev
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x1->X1::f6();
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// CHECK: define linkonce_odr hidden void @_ZN2X22f2Ev
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x2->f2();
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// CHECK: define available_externally void @_ZN2X1IfE2f2Ev
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x3->f2();
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}
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// rdar://problem/8614470
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namespace test1 {
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struct __attribute__((visibility("default"))) A {
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inline void foo();
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~A();
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};
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void test() {
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A a;
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a.foo();
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}
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// CHECK: declare void @_ZN5test11A3fooEv
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// CHECK: declare {{.*}} @_ZN5test11AD1Ev
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}
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// PR8713
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namespace test2 {
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struct A {};
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template <class T> class B {};
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typedef B<A> arg;
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namespace ns __attribute__((visibility("default"))) {
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template <class T> inline void foo() {}
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extern template void foo<arg>();
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}
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void test() {
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ns::foo<arg>();
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}
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// CHECK: define available_externally void @_ZN5test22ns3fooINS_1BINS_1AEEEEEvv()
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}
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namespace PR11642 {
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template <typename T>
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class Foo {
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public:
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T foo(T x) { return x; }
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};
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extern template class Foo<int>;
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template class Foo<int>;
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// CHECK: define weak_odr i32 @_ZN7PR116423FooIiE3fooEi
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}
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// Test that clang implements the new gcc behaviour for inline functions.
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// GCC PR30066.
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namespace test3 {
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inline void foo(void) {
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}
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template<typename T>
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inline void zed() {
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}
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template void zed<float>();
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void bar(void) {
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foo();
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zed<int>();
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}
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// CHECK: define weak_odr void @_ZN5test33zedIfEEvv
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// CHECK: define linkonce_odr hidden void @_ZN5test33fooEv
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// CHECK: define linkonce_odr hidden void @_ZN5test33zedIiEEvv
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}
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namespace test4 {
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extern inline __attribute__ ((__gnu_inline__))
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void foo() {}
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void bar() {
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foo();
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}
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// CHECK: define available_externally void @_ZN5test43fooE
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}
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namespace test5 {
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// just don't crash.
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template <int> inline void Op();
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class UnaryInstruction {
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UnaryInstruction() {
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Op<0>();
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}
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};
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template <int Idx_nocapture> void Op() {
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}
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}
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namespace test6 {
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// just don't crash.
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template <typename T>
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void f(T x) {
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}
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struct C {
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static void g() {
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f([](){});
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}
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};
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void g() {
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C::g();
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}
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}
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