minix/external/bsd/llvm/dist/clang/test/CodeGenCXX/thunks.cpp
Lionel Sambuc f4a2713ac8 Importing netbsd clang -- pristine
Change-Id: Ia40e9ffdf29b5dab2f122f673ff6802a58bc690f
2014-07-28 17:05:57 +02:00

351 lines
6.7 KiB
C++

// RUN: %clang_cc1 %s -triple=x86_64-pc-linux-gnu -munwind-tables -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux-gnu -munwind-tables -fhidden-weak-vtables -emit-llvm -o - | FileCheck -check-prefix=CHECK-HIDDEN %s
namespace Test1 {
// Check that we emit a non-virtual thunk for C::f.
struct A {
virtual void f();
};
struct B {
virtual void f();
};
struct C : A, B {
virtual void c();
virtual void f();
};
// CHECK-LABEL: define void @_ZThn8_N5Test11C1fEv(
void C::f() { }
}
namespace Test2 {
// Check that we emit a thunk for B::f since it's overriding a virtual base.
struct A {
virtual void f();
};
struct B : virtual A {
virtual void b();
virtual void f();
};
// CHECK-LABEL: define void @_ZTv0_n24_N5Test21B1fEv(
void B::f() { }
}
namespace Test3 {
// Check that we emit a covariant thunk for B::f.
struct V1 { };
struct V2 : virtual V1 { };
struct A {
virtual V1 *f();
};
struct B : A {
virtual void b();
virtual V2 *f();
};
// CHECK: define %{{.*}}* @_ZTch0_v0_n24_N5Test31B1fEv(
V2 *B::f() { return 0; }
}
namespace Test4 {
// Check that the thunk for 'C::f' has the same visibility as the function itself.
struct A {
virtual void f();
};
struct B {
virtual void f();
};
struct __attribute__((visibility("protected"))) C : A, B {
virtual void c();
virtual void f();
};
// CHECK-LABEL: define protected void @_ZThn8_N5Test41C1fEv(
void C::f() { }
}
// Check that the thunk gets internal linkage.
namespace Test4B {
struct A {
virtual void f();
};
struct B {
virtual void f();
};
namespace {
struct C : A, B {
virtual void c();
virtual void f();
};
}
void C::c() {}
void C::f() {}
// Force C::f to be used.
void f() {
C c;
c.f();
}
}
namespace Test5 {
// Check that the thunk for 'B::f' gets the same linkage as the function itself.
struct A {
virtual void f();
};
struct B : virtual A {
virtual void f() { }
};
void f(B b) {
b.f();
}
}
namespace Test6 {
struct X {
X();
X(const X&);
X &operator=(const X&);
~X();
};
struct P {
P();
P(const P&);
~P();
X first;
X second;
};
P getP();
struct Base1 {
int i;
virtual X f() { return X(); }
};
struct Base2 {
float real;
virtual X f() { return X(); }
};
struct Thunks : Base1, Base2 {
long l;
virtual X f();
};
// CHECK-LABEL: define void @_ZThn16_N5Test66Thunks1fEv
// CHECK-NOT: memcpy
// CHECK: {{call void @_ZN5Test66Thunks1fEv.*sret}}
// CHECK: ret void
X Thunks::f() { return X(); }
}
namespace Test7 {
// PR7188
struct X {
X();
X(const X&);
X &operator=(const X&);
~X();
};
struct Small { short s; };
struct Large {
char array[1024];
};
class A {
protected:
virtual void foo() = 0;
};
class B : public A {
protected:
virtual void bar() = 0;
};
class C : public A {
protected:
virtual void baz(X, X&, _Complex float, Small, Small&, Large) = 0;
};
class D : public B,
public C {
void foo() {}
void bar() {}
void baz(X, X&, _Complex float, Small, Small&, Large);
};
void D::baz(X, X&, _Complex float, Small, Small&, Large) { }
// CHECK-LABEL: define void @_ZThn8_N5Test71D3bazENS_1XERS1_CfNS_5SmallERS4_NS_5LargeE(
// CHECK-NOT: memcpy
// CHECK: ret void
void testD() { D d; }
}
namespace Test8 {
struct NonPOD { ~NonPOD(); int x, y, z; };
struct A { virtual void foo(); };
struct B { virtual void bar(NonPOD); };
struct C : A, B { virtual void bar(NonPOD); static void helper(NonPOD); };
// CHECK: define void @_ZN5Test81C6helperENS_6NonPODE([[NONPODTYPE:%.*]]*
void C::helper(NonPOD var) {}
// CHECK-LABEL: define void @_ZThn8_N5Test81C3barENS_6NonPODE(
// CHECK-NOT: load [[NONPODTYPE]]*
// CHECK-NOT: memcpy
// CHECK: ret void
void C::bar(NonPOD var) {}
}
// PR7241: Emitting thunks for a method shouldn't require the vtable for
// that class to be emitted.
namespace Test9 {
struct A { virtual ~A() { } };
struct B : A { virtual void test() const {} };
struct C : B { C(); ~C(); };
struct D : C { D() {} };
void test() {
D d;
}
}
namespace Test10 {
struct A { virtual void foo(); };
struct B { virtual void foo(); };
struct C : A, B { void foo() {} };
// CHECK-HIDDEN-LABEL: define linkonce_odr void @_ZN6Test101C3fooEv
// CHECK-HIDDEN-LABEL: define linkonce_odr hidden void @_ZThn8_N6Test101C3fooEv
void test() {
C c;
}
}
// PR7611
namespace Test11 {
struct A { virtual A* f(); };
struct B : virtual A { virtual A* f(); };
struct C : B { virtual C* f(); };
C* C::f() { return 0; }
// C::f itself.
// CHECK: define {{.*}} @_ZN6Test111C1fEv(
// The this-adjustment and return-adjustment thunk required when
// C::f appears in a vtable where A is at a nonzero offset from C.
// CHECK: define {{.*}} @_ZTcv0_n24_v0_n32_N6Test111C1fEv(
// The return-adjustment thunk required when C::f appears in a vtable
// where A is at a zero offset from C.
// CHECK: define {{.*}} @_ZTch0_v0_n32_N6Test111C1fEv(
}
// Varargs thunk test.
namespace Test12 {
struct A {
virtual A* f(int x, ...);
};
struct B {
virtual B* f(int x, ...);
};
struct C : A, B {
virtual void c();
virtual C* f(int x, ...);
};
C* C::f(int x, ...) { return this; }
// C::f
// CHECK: define {{.*}} @_ZN6Test121C1fEiz
// Varargs thunk; check that both the this and covariant adjustments
// are generated.
// CHECK: define {{.*}} @_ZTchn8_h8_N6Test121C1fEiz
// CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
// CHECK: getelementptr inbounds i8* {{.*}}, i64 8
}
// PR13832
namespace Test13 {
struct B1 {
virtual B1 &foo1();
};
struct Pad1 {
virtual ~Pad1();
};
struct Proxy1 : Pad1, B1 {
virtual ~Proxy1();
};
struct D : virtual Proxy1 {
virtual ~D();
virtual D &foo1();
};
D& D::foo1() {
return *this;
}
// CHECK: define {{.*}} @_ZTcvn8_n32_v8_n24_N6Test131D4foo1Ev
// CHECK: getelementptr inbounds i8* {{.*}}, i64 -8
// CHECK: getelementptr inbounds i8* {{.*}}, i64 -32
// CHECK: getelementptr inbounds i8* {{.*}}, i64 -24
// CHECK: getelementptr inbounds i8* {{.*}}, i64 8
// CHECK: ret %"struct.Test13::D"*
}
namespace Test14 {
class A {
virtual void f();
};
class B {
virtual void f();
};
class C : public A, public B {
virtual void f();
};
void C::f() {
}
// CHECK: define void @_ZThn8_N6Test141C1fEv({{.*}}) unnamed_addr [[NUW:#[0-9]+]]
}
/**** The following has to go at the end of the file ****/
// This is from Test5:
// CHECK-LABEL: define linkonce_odr void @_ZTv0_n24_N5Test51B1fEv
// CHECK-LABEL: define internal void @_ZThn8_N6Test4B12_GLOBAL__N_11C1fEv(
// CHECK: attributes [[NUW]] = { nounwind uwtable{{.*}} }