llvm-project/clang/test/CodeGenCXX/destructors.cpp

533 lines
17 KiB
C++

// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -emit-llvm -o - -mconstructor-aliases -fcxx-exceptions -fexceptions -O1 -disable-llvm-passes -std=c++03 > %t
// RUN: FileCheck --check-prefix=CHECK1 --input-file=%t %s
// RUN: FileCheck --check-prefix=CHECK2 --input-file=%t %s
// RUN: FileCheck --check-prefix=CHECK3 --input-file=%t %s
// RUN: FileCheck --check-prefixes=CHECK4,CHECK4v03 --input-file=%t %s
// RUN: FileCheck --check-prefixes=CHECK5,CHECK5v03 --input-file=%t %s
// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -emit-llvm -o - -mconstructor-aliases -fcxx-exceptions -fexceptions -O1 -disable-llvm-passes -std=c++11 > %t2
// RUN: FileCheck --check-prefix=CHECK1 --input-file=%t2 %s
// RUN: FileCheck --check-prefix=CHECK2v11 --input-file=%t2 %s
// RUN: FileCheck --check-prefix=CHECK3 --input-file=%t2 %s
// RUN: FileCheck --check-prefixes=CHECK4,CHECK4v11 --input-file=%t2 %s
// RUN: FileCheck --check-prefixes=CHECK5,CHECK5v11 --input-file=%t2 %s
// RUN: FileCheck --check-prefix=CHECK6 --input-file=%t2 %s
// REQUIRES: asserts
struct A {
int a;
~A();
};
// Base with non-trivial destructor
struct B : A {
~B();
};
B::~B() { }
// Field with non-trivial destructor
struct C {
A a;
~C();
};
C::~C() { }
namespace PR7526 {
extern void foo();
struct allocator {
~allocator() throw();
};
struct allocator_derived : allocator { };
// CHECK1-LABEL: define void @_ZN6PR75263fooEv()
// CHECK1: call void {{.*}} @_ZN6PR75269allocatorD2Ev
// CHECK1-LABEL: define void @_ZN6PR75269allocatorD2Ev(%"struct.PR7526::allocator"* %this) unnamed_addr
// CHECK1: call void @__cxa_call_unexpected
allocator::~allocator() throw() { foo(); }
void foo() {
allocator_derived ad;
}
}
// PR5084
template<typename T>
class A1 {
~A1();
};
template<> A1<char>::~A1();
// PR5529
namespace PR5529 {
struct A {
~A();
};
A::~A() { }
struct B : A {
virtual ~B();
};
B::~B() {}
}
// FIXME: there's a known problem in the codegen here where, if one
// destructor throws, the remaining destructors aren't run. Fix it,
// then make this code check for it.
namespace test0 {
void foo();
struct VBase { ~VBase(); };
struct Base { ~Base(); };
struct Member { ~Member(); };
struct A : Base {
Member M;
~A();
};
// The function-try-block won't suppress -mconstructor-aliases here.
A::~A() try { } catch (int i) {}
// complete destructor alias tested above
// CHECK2-LABEL: @_ZN5test01AD1Ev = alias {{.*}} @_ZN5test01AD2Ev
// CHECK2-LABEL: define void @_ZN5test01AD2Ev(%"struct.test0::A"* %this) unnamed_addr
// CHECK2: invoke void @_ZN5test06MemberD1Ev
// CHECK2: unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
// CHECK2: invoke void @_ZN5test04BaseD2Ev
// CHECK2: unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
// In C++11, the destructors are often known not to throw.
// CHECK2v11-LABEL: @_ZN5test01AD1Ev = alias {{.*}} @_ZN5test01AD2Ev
// CHECK2v11-LABEL: define void @_ZN5test01AD2Ev(%"struct.test0::A"* %this) unnamed_addr
// CHECK2v11: call void @_ZN5test06MemberD1Ev
// CHECK2v11: call void @_ZN5test04BaseD2Ev
struct B : Base, virtual VBase {
Member M;
~B();
};
B::~B() try { } catch (int i) {}
// It will suppress the delegation optimization here, though.
// CHECK2-LABEL: define void @_ZN5test01BD2Ev(%"struct.test0::B"* %this, i8** %vtt) unnamed_addr
// CHECK2: invoke void @_ZN5test06MemberD1Ev
// CHECK2: unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
// CHECK2: invoke void @_ZN5test04BaseD2Ev
// CHECK2: unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
// CHECK2v11-LABEL: define void @_ZN5test01BD2Ev(%"struct.test0::B"* %this, i8** %vtt) unnamed_addr
// CHECK2v11: call void @_ZN5test06MemberD1Ev
// CHECK2v11: call void @_ZN5test04BaseD2Ev
// CHECK2-LABEL: define void @_ZN5test01BD1Ev(%"struct.test0::B"* %this) unnamed_addr
// CHECK2: invoke void @_ZN5test06MemberD1Ev
// CHECK2: unwind label [[MEM_UNWIND:%[a-zA-Z0-9.]+]]
// CHECK2: invoke void @_ZN5test04BaseD2Ev
// CHECK2: unwind label [[BASE_UNWIND:%[a-zA-Z0-9.]+]]
// CHECK2: invoke void @_ZN5test05VBaseD2Ev
// CHECK2: unwind label [[VBASE_UNWIND:%[a-zA-Z0-9.]+]]
// CHECK2v11-LABEL: define void @_ZN5test01BD1Ev(%"struct.test0::B"* %this) unnamed_addr
// CHECK2v11: call void @_ZN5test06MemberD1Ev
// CHECK2v11: call void @_ZN5test04BaseD2Ev
// CHECK2v11: call void @_ZN5test05VBaseD2Ev
}
// Test base-class aliasing.
namespace test1 {
struct A { ~A(); char ***m; }; // non-trivial destructor
struct B { ~B(); }; // non-trivial destructor
struct Empty { }; // trivial destructor, empty
struct NonEmpty { int x; }; // trivial destructor, non-empty
// There must be a definition in this translation unit for the alias
// optimization to apply.
A::~A() { delete m; }
struct M : A { ~M(); };
M::~M() {}
// CHECK3: @_ZN5test11MD2Ev = alias {{.*}} @_ZN5test11AD2Ev
struct N : A, Empty { ~N(); };
N::~N() {}
// CHECK3: @_ZN5test11ND2Ev = alias {{.*}} @_ZN5test11AD2Ev
struct O : Empty, A { ~O(); };
O::~O() {}
// CHECK3: @_ZN5test11OD2Ev = alias {{.*}} @_ZN5test11AD2Ev
struct P : NonEmpty, A { ~P(); };
P::~P() {} // CHECK3-LABEL: define void @_ZN5test11PD2Ev(%"struct.test1::P"* %this) unnamed_addr
struct Q : A, B { ~Q(); };
Q::~Q() {} // CHECK3-LABEL: define void @_ZN5test11QD2Ev(%"struct.test1::Q"* %this) unnamed_addr
struct R : A { ~R(); };
R::~R() { A a; } // CHECK3-LABEL: define void @_ZN5test11RD2Ev(%"struct.test1::R"* %this) unnamed_addr
struct S : A { ~S(); int x; };
S::~S() {}
// CHECK4: @_ZN5test11SD2Ev = alias {{.*}}, bitcast {{.*}} @_ZN5test11AD2Ev
struct T : A { ~T(); B x; };
T::~T() {} // CHECK4-LABEL: define void @_ZN5test11TD2Ev(%"struct.test1::T"* %this) unnamed_addr
// The VTT parameter prevents this. We could still make this work
// for calling conventions that are safe against extra parameters.
struct U : A, virtual B { ~U(); };
U::~U() {} // CHECK4-LABEL: define void @_ZN5test11UD2Ev(%"struct.test1::U"* %this, i8** %vtt) unnamed_addr
}
// PR6471
namespace test2 {
struct A { ~A(); char ***m; };
struct B : A { ~B(); };
B::~B() {}
// CHECK4-LABEL: define void @_ZN5test21BD2Ev(%"struct.test2::B"* %this) unnamed_addr
// CHECK4: call void @_ZN5test21AD2Ev
}
// PR7142
namespace test3 {
struct A { virtual ~A(); };
struct B { virtual ~B(); };
namespace { // internal linkage => deferred
struct C : A, B {}; // ~B() in D requires a this-adjustment thunk
struct D : C {}; // D::~D() is an alias to C::~C()
}
void test() {
new D; // Force emission of D's vtable
}
// CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11CD2Ev(%"struct.test3::(anonymous namespace)::C"* %this) unnamed_addr
// CHECK4v03: invoke void @_ZN5test31BD2Ev(
// CHECK4v11: call void @_ZN5test31BD2Ev(
// CHECK4: call void @_ZN5test31AD2Ev(
// CHECK4: ret void
// CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11DD0Ev(%"struct.test3::(anonymous namespace)::D"* %this) unnamed_addr
// CHECK4v03-SAME: personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
// CHECK4v03: invoke void {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
// CHECK4v11: call void {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
// CHECK4: call void @_ZdlPv({{.*}}) [[NUW:#[0-9]+]]
// CHECK4: ret void
// CHECK4v03: landingpad { i8*, i32 }
// CHECK4v03-NEXT: cleanup
// CHECK4v03: call void @_ZdlPv({{.*}}) [[NUW]]
// CHECK4v03: resume { i8*, i32 }
// CHECK4v11-NOT: landingpad
// CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD1Ev(
// CHECK4: getelementptr inbounds i8, i8* {{.*}}, i64 -8
// CHECK4: call void {{.*}} @_ZN5test312_GLOBAL__N_11CD2Ev
// CHECK4: ret void
// CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11DD0Ev(
// CHECK4: getelementptr inbounds i8, i8* {{.*}}, i64 -8
// CHECK4: call void @_ZN5test312_GLOBAL__N_11DD0Ev(
// CHECK4: ret void
// CHECK4-LABEL: define internal void @_ZN5test312_GLOBAL__N_11CD0Ev(%"struct.test3::(anonymous namespace)::C"* %this) unnamed_addr
// CHECK4v03-SAME: personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
// CHECK4v03: invoke void @_ZN5test312_GLOBAL__N_11CD2Ev(
// CHECK4v11: call void @_ZN5test312_GLOBAL__N_11CD2Ev(
// CHECK4: call void @_ZdlPv({{.*}}) [[NUW]]
// CHECK4: ret void
// CHECK4v03: landingpad { i8*, i32 }
// CHECK4v03-NEXT: cleanup
// CHECK4v03: call void @_ZdlPv({{.*}}) [[NUW]]
// CHECK4v03: resume { i8*, i32 }
// CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD1Ev(
// CHECK4: getelementptr inbounds i8, i8* {{.*}}, i64 -8
// CHECK4: call void @_ZN5test312_GLOBAL__N_11CD2Ev(
// CHECK4: ret void
// CHECK4-LABEL: define internal void @_ZThn8_N5test312_GLOBAL__N_11CD0Ev(
// CHECK4: getelementptr inbounds i8, i8* {{.*}}, i64 -8
// CHECK4: call void @_ZN5test312_GLOBAL__N_11CD0Ev(
// CHECK4: ret void
// CHECK4-LABEL: declare void @_ZN5test31BD2Ev(
// CHECK4-LABEL: declare void @_ZN5test31AD2Ev(
// CHECK4: attributes [[NUW]] = {{[{].*}} nounwind {{.*[}]}}
}
namespace test4 {
struct A { ~A(); };
// CHECK5-LABEL: define void @_ZN5test43fooEv()
// CHECK5: call void @_ZN5test41AD1Ev
// CHECK5: ret void
void foo() {
{
A a;
goto failure;
}
failure:
return;
}
// CHECK5-LABEL: define void @_ZN5test43barEi(
// CHECK5: [[X:%.*]] = alloca i32
// CHECK5-NEXT: [[A:%.*]] = alloca
// CHECK5: br label
// CHECK5: [[TMP:%.*]] = load i32, i32* [[X]]
// CHECK5-NEXT: [[CMP:%.*]] = icmp ne i32 [[TMP]], 0
// CHECK5-NEXT: br i1
// CHECK5: call void @_ZN5test41AD1Ev(
// CHECK5: br label
// CHECK5: [[TMP:%.*]] = load i32, i32* [[X]]
// CHECK5: [[TMP2:%.*]] = add nsw i32 [[TMP]], -1
// CHECK5: store i32 [[TMP2]], i32* [[X]]
// CHECK5: br label
// CHECK5: ret void
void bar(int x) {
for (A a; x; ) {
x--;
}
}
}
// PR7575
namespace test5 {
struct A { ~A(); };
// CHECK5-LABEL: define void @_ZN5test53fooEv()
// CHECK5: [[ELEMS:%.*]] = alloca [5 x [[A:%.*]]], align
// CHECK5v03-NEXT: [[EXN:%.*]] = alloca i8*
// CHECK5v03-NEXT: [[SEL:%.*]] = alloca i32
// CHECK5-NEXT: [[PELEMS:%.*]] = bitcast [5 x [[A]]]* [[ELEMS]] to i8*
// CHECK5-NEXT: call void @llvm.lifetime.start.p0i8(i64 5, i8* [[PELEMS]])
// CHECK5-NEXT: [[BEGIN:%.*]] = getelementptr inbounds [5 x [[A]]], [5 x [[A]]]* [[ELEMS]], i32 0, i32 0
// CHECK5-NEXT: [[END:%.*]] = getelementptr inbounds [[A]], [[A]]* [[BEGIN]], i64 5
// CHECK5-NEXT: br label
// CHECK5: [[POST:%.*]] = phi [[A]]* [ [[END]], {{%.*}} ], [ [[ELT:%.*]], {{%.*}} ]
// CHECK5-NEXT: [[ELT]] = getelementptr inbounds [[A]], [[A]]* [[POST]], i64 -1
// CHECK5v03-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[ELT]])
// CHECK5v11-NEXT: call void @_ZN5test51AD1Ev([[A]]* [[ELT]])
// CHECK5: [[T0:%.*]] = icmp eq [[A]]* [[ELT]], [[BEGIN]]
// CHECK5-NEXT: br i1 [[T0]],
// CHECK5: call void @llvm.lifetime.end
// CHECK5-NEXT: ret void
// lpad
// CHECK5v03: [[EMPTY:%.*]] = icmp eq [[A]]* [[BEGIN]], [[ELT]]
// CHECK5v03-NEXT: br i1 [[EMPTY]]
// CHECK5v03: [[AFTER:%.*]] = phi [[A]]* [ [[ELT]], {{%.*}} ], [ [[CUR:%.*]], {{%.*}} ]
// CHECK5v03-NEXT: [[CUR:%.*]] = getelementptr inbounds [[A]], [[A]]* [[AFTER]], i64 -1
// CHECK5v03-NEXT: invoke void @_ZN5test51AD1Ev([[A]]* [[CUR]])
// CHECK5v03: [[DONE:%.*]] = icmp eq [[A]]* [[CUR]], [[BEGIN]]
// CHECK5v03-NEXT: br i1 [[DONE]],
// CHECK5v11-NOT: landingpad
// CHECK5v11: }
void foo() {
A elems[5];
}
}
namespace test6 {
void opaque();
struct A { ~A(); };
template <unsigned> struct B { B(); ~B(); int _; };
struct C : B<0>, B<1>, virtual B<2>, virtual B<3> {
A x, y, z;
C();
~C();
};
C::C() { opaque(); }
// CHECK5-LABEL: define void @_ZN5test61CC1Ev(%"struct.test6::C"* %this) unnamed_addr
// CHECK5: call void @_ZN5test61BILj2EEC2Ev
// CHECK5: invoke void @_ZN5test61BILj3EEC2Ev
// CHECK5: invoke void @_ZN5test61BILj0EEC2Ev
// CHECK5: invoke void @_ZN5test61BILj1EEC2Ev
// CHECK5: invoke void @_ZN5test66opaqueEv
// CHECK5: ret void
// FIXME: way too much EH cleanup code follows
C::~C() { opaque(); }
// CHECK5-LABEL: define void @_ZN5test61CD2Ev(%"struct.test6::C"* %this, i8** %vtt) unnamed_addr
// CHECK5: invoke void @_ZN5test66opaqueEv
// CHECK5v03: invoke void @_ZN5test61AD1Ev
// CHECK5v03: invoke void @_ZN5test61AD1Ev
// CHECK5v03: invoke void @_ZN5test61AD1Ev
// CHECK5v03: invoke void @_ZN5test61BILj1EED2Ev
// CHECK5v11: call void @_ZN5test61AD1Ev
// CHECK5v11: call void @_ZN5test61AD1Ev
// CHECK5v11: call void @_ZN5test61AD1Ev
// CHECK5v11: call void @_ZN5test61BILj1EED2Ev
// CHECK5: call void @_ZN5test61BILj0EED2Ev
// CHECK5: ret void
// CHECK5v03: invoke void @_ZN5test61AD1Ev
// CHECK5v03: invoke void @_ZN5test61AD1Ev
// CHECK5v03: invoke void @_ZN5test61AD1Ev
// CHECK5v03: invoke void @_ZN5test61BILj1EED2Ev
// CHECK5v03: invoke void @_ZN5test61BILj0EED2Ev
// CHECK5-LABEL: define void @_ZN5test61CD1Ev(%"struct.test6::C"* %this) unnamed_addr
// CHECK5v03: invoke void @_ZN5test61CD2Ev
// CHECK5v03: invoke void @_ZN5test61BILj3EED2Ev
// CHECK5v03: call void @_ZN5test61BILj2EED2Ev
// CHECK5v03: ret void
// CHECK5v03: invoke void @_ZN5test61BILj3EED2Ev
// CHECK5v03: invoke void @_ZN5test61BILj2EED2Ev
// CHECK5v11: call void @_ZN5test61CD2Ev
// CHECK5v11: call void @_ZN5test61BILj3EED2Ev
// CHECK5v11: call void @_ZN5test61BILj2EED2Ev
// CHECK5v11: ret void
}
// PR 9197
namespace test7 {
struct D { ~D(); };
struct A { ~A(); };
A::~A() { }
struct B : public A {
~B();
D arr[1];
};
// Verify that this doesn't get emitted as an alias
// CHECK5-LABEL: define void @_ZN5test71BD2Ev(
// CHECK5v03: invoke void @_ZN5test71DD1Ev(
// CHECK5v11: call void @_ZN5test71DD1Ev(
// CHECK5: call void @_ZN5test71AD2Ev(
B::~B() {}
}
// PR10467
namespace test8 {
struct A { A(); ~A(); };
void die() __attribute__((noreturn));
void test() {
A x;
while (1) {
A y;
goto l;
}
l: die();
}
// CHECK5-LABEL: define void @_ZN5test84testEv()
// CHECK5: [[X:%.*]] = alloca [[A:%.*]], align 1
// CHECK5-NEXT: [[Y:%.*]] = alloca [[A:%.*]], align 1
// CHECK5: call void @_ZN5test81AC1Ev([[A]]* [[X]])
// CHECK5-NEXT: br label
// CHECK5: invoke void @_ZN5test81AC1Ev([[A]]* [[Y]])
// CHECK5v03: invoke void @_ZN5test81AD1Ev([[A]]* [[Y]])
// CHECK5v11: call void @_ZN5test81AD1Ev([[A]]* [[Y]])
// CHECK5-NOT: switch
// CHECK5: invoke void @_ZN5test83dieEv()
// CHECK5: unreachable
}
// PR12710
namespace test9 {
struct ArgType {
~ArgType();
};
template<typename T>
void f1(const ArgType& = ArgType());
void f2();
void bar() {
f1<int>();
f2();
}
// CHECK5: call void @_ZN5test97ArgTypeD1Ev(%"struct.test9::ArgType"* %
// CHECK5: call void @_ZN5test92f2Ev()
}
namespace test10 {
// We used to crash trying to replace _ZN6test106OptionD1Ev with
// _ZN6test106OptionD2Ev twice.
struct Option {
virtual ~Option() {}
};
template <class DataType> class opt : public Option {};
template class opt<int>;
// CHECK5-LABEL: define zeroext i1 @_ZN6test1016handleOccurrenceEv(
bool handleOccurrence() {
// CHECK5: call void @_ZN6test106OptionD2Ev(
Option x;
return true;
}
}
#if __cplusplus >= 201103L
namespace test11 {
// Check that lifetime.end is emitted in the landing pad.
// CHECK6-LABEL: define void @_ZN6test1115testLifetimeEndEi(
// CHECK6: entry:
// CHECK6: [[T1:%[a-z0-9]+]] = alloca %"struct.test11::S1"
// CHECK6: [[T2:%[a-z0-9]+]] = alloca %"struct.test11::S1"
// CHECK6: [[T3:%[a-z0-9]+]] = alloca %"struct.test11::S1"
// CHECK6: {{^}}invoke.cont
// CHECK6: call void @_ZN6test112S1D1Ev(%"struct.test11::S1"* [[T1]])
// CHECK6: [[BC1:%[a-z0-9]+]] = bitcast %"struct.test11::S1"* [[T1]] to i8*
// CHECK6: call void @llvm.lifetime.end.p0i8(i64 32, i8* [[BC1]])
// CHECK6: {{^}}lpad
// CHECK6: call void @_ZN6test112S1D1Ev(%"struct.test11::S1"* [[T1]])
// CHECK6: [[BC2:%[a-z0-9]+]] = bitcast %"struct.test11::S1"* [[T1]] to i8*
// CHECK6: call void @llvm.lifetime.end.p0i8(i64 32, i8* [[BC2]])
// CHECK6: {{^}}invoke.cont
// CHECK6: call void @_ZN6test112S1D1Ev(%"struct.test11::S1"* [[T2]])
// CHECK6: [[BC3:%[a-z0-9]+]] = bitcast %"struct.test11::S1"* [[T2]] to i8*
// CHECK6: call void @llvm.lifetime.end.p0i8(i64 32, i8* [[BC3]])
// CHECK6: {{^}}lpad
// CHECK6: call void @_ZN6test112S1D1Ev(%"struct.test11::S1"* [[T2]])
// CHECK6: [[BC4:%[a-z0-9]+]] = bitcast %"struct.test11::S1"* [[T2]] to i8*
// CHECK6: call void @llvm.lifetime.end.p0i8(i64 32, i8* [[BC4]])
// CHECK6: {{^}}invoke.cont
// CHECK6: call void @_ZN6test112S1D1Ev(%"struct.test11::S1"* [[T3]])
// CHECK6: [[BC5:%[a-z0-9]+]] = bitcast %"struct.test11::S1"* [[T3]] to i8*
// CHECK6: call void @llvm.lifetime.end.p0i8(i64 32, i8* [[BC5]])
// CHECK6: {{^}}lpad
// CHECK6: call void @_ZN6test112S1D1Ev(%"struct.test11::S1"* [[T3]])
// CHECK6: [[BC6:%[a-z0-9]+]] = bitcast %"struct.test11::S1"* [[T3]] to i8*
// CHECK6: call void @llvm.lifetime.end.p0i8(i64 32, i8* [[BC6]])
struct S1 {
~S1();
int a[8];
};
void func1(S1 &) noexcept(false);
void testLifetimeEnd(int n) {
if (n < 10) {
S1 t1;
func1(t1);
} else if (n < 100) {
S1 t2;
func1(t2);
} else if (n < 1000) {
S1 t3;
func1(t3);
}
}
}
#endif