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// RUN: %clang_cc1 %s -triple i686-linux -emit-llvm -o - -mconstructor-aliases -O1 -disable-llvm-optzns | FileCheck %s
// RUN: %clang_cc1 %s -triple i686-linux -emit-llvm -o - -mconstructor-aliases | FileCheck --check-prefix=NOOPT %s
// RUN: %clang_cc1 -cc1 -triple x86_64--netbsd -emit-llvm \
// RUN: -mconstructor-aliases -O2 %s -o - | FileCheck --check-prefix=CHECK-RAUW %s
namespace test1 {
// test that we don't produce an alias when the destructor is weak_odr. The
// reason to avoid it that another TU might have no explicit template
// instantiation definition or declaration, causing it to to output only
// one of the destructors as linkonce_odr, producing a different comdat.
// CHECK-DAG: define weak_odr void @_ZN5test16foobarIvEC2Ev
// CHECK-DAG: define weak_odr void @_ZN5test16foobarIvEC1Ev
template <typename T> struct foobar {
foobar() {}
};
template struct foobar<void>;
}
namespace test2 {
// test that when the destrucor is linkonce_odr we just replace every use of
// C1 with C2.
// CHECK-DAG: define linkonce_odr void @_ZN5test26foobarIvEC2Ev(
// CHECK-DAG: call void @_ZN5test26foobarIvEC2Ev
void g();
template <typename T> struct foobar {
foobar() { g(); }
};
foobar<void> x;
}
namespace test3 {
// test that instead of an internal alias we just use the other destructor
// directly.
// CHECK-DAG: define internal void @_ZN5test312_GLOBAL__N_11AD2Ev(
// CHECK-DAG: call i32 @__cxa_atexit{{.*}}_ZN5test312_GLOBAL__N_11AD2Ev
namespace {
struct A {
~A() {}
};
struct B : public A {};
}
B x;
}
namespace test4 {
// Test that we don't produce aliases from B to A. We cannot because we cannot
// guarantee that they will be present in every TU. Instead, we just call
// A's destructor directly.
// CHECK-DAG: define linkonce_odr void @_ZN5test41AD2Ev(
// CHECK-DAG: call i32 @__cxa_atexit{{.*}}_ZN5test41AD2Ev
// test that we don't do this optimization at -O0 so that the debugger can
// see both destructors.
// NOOPT-DAG: call i32 @__cxa_atexit{{.*}}@_ZN5test41BD2Ev
// NOOOPT-DAG: define linkonce_odr void @_ZN5test41BD2Ev
struct A {
virtual ~A() {}
};
struct B : public A{
~B() {}
};
B X;
}
namespace test5 {
// similar to test4, but with an internal B.
// CHECK-DAG: define linkonce_odr void @_ZN5test51AD2Ev(
// CHECK-DAG: call i32 @__cxa_atexit{{.*}}_ZN5test51AD2Ev
struct A {
virtual ~A() {}
};
namespace {
struct B : public A{
~B() {}
};
}
B X;
}
namespace test6 {
// Test that we use ~A directly, even when ~A is not defined. The symbol for
// ~B would have been internal and still contain a reference to ~A.
struct A {
virtual ~A();
};
namespace {
struct B : public A {
~B() {}
};
}
B X;
// CHECK-DAG: call i32 @__cxa_atexit({{.*}}@_ZN5test61AD2Ev
}
namespace test7 {
// Test that we don't produce an alias from ~B to ~A<int> (or crash figuring
// out if we should).
// pr17875.
// CHECK-DAG: define void @_ZN5test71BD2Ev
template <typename> struct A {
~A() {}
};
class B : A<int> {
~B();
};
template class A<int>;
B::~B() {}
}
namespace test8 {
// Test that we replace ~zed with ~bar which is an alias to ~foo.
// CHECK-DAG: call i32 @__cxa_atexit({{.*}}@_ZN5test83barD2Ev
// CHECK-DAG: @_ZN5test83barD2Ev = alias {{.*}} @_ZN5test83fooD2Ev
struct foo {
~foo();
};
foo::~foo() {}
struct bar : public foo {
~bar();
};
bar::~bar() {}
struct zed : public bar {};
zed foo;
}
namespace test9 {
struct foo {
__attribute__((stdcall)) ~foo() {
}
};
struct bar : public foo {};
void zed() {
// Test that we produce a call to bar's destructor. We used to call foo's, but
// it has a different calling conversion.
// CHECK-DAG: call void @_ZN5test93barD2Ev
bar ptr;
}
}
// CHECK-RAUW: @_ZTV1C = linkonce_odr unnamed_addr constant [4 x i8*] [{{[^@]*}}@_ZTI1C {{[^@]*}}@_ZN1CD2Ev {{[^@]*}}@_ZN1CD0Ev {{[^@]*}}]
// r194296 replaced C::~C with B::~B without emitting the later.
class A {
public:
A(int);
virtual ~A();
};
template <class>
class B : A {
public:
B()
: A(0) {
}
__attribute__((always_inline)) ~B() {
}
};
extern template class B<char>;
class C : B<char> {
};
void
fn1() {
new C;
}
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