forked from OSchip/llvm-project
393 lines
7.4 KiB
C++
393 lines
7.4 KiB
C++
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux-gnu -munwind-tables -emit-llvm -o - | FileCheck %s
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// RUN: %clang_cc1 %s -triple=x86_64-pc-linux-gnu -munwind-tables -emit-llvm -o - -O1 -disable-llvm-optzns | FileCheck %s
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namespace Test1 {
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// Check that we emit a non-virtual thunk for C::f.
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struct A {
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virtual void f();
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};
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struct B {
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virtual void f();
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};
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struct C : A, B {
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virtual void c();
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virtual void f();
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};
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// CHECK-LABEL: define void @_ZThn8_N5Test11C1fEv(
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void C::f() { }
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}
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namespace Test2 {
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// Check that we emit a thunk for B::f since it's overriding a virtual base.
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struct A {
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virtual void f();
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};
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struct B : virtual A {
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virtual void b();
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virtual void f();
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};
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// CHECK-LABEL: define void @_ZTv0_n24_N5Test21B1fEv(
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void B::f() { }
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}
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namespace Test3 {
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// Check that we emit a covariant thunk for B::f.
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struct V1 { };
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struct V2 : virtual V1 { };
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struct A {
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virtual V1 *f();
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};
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struct B : A {
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virtual void b();
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virtual V2 *f();
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};
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// CHECK: define %{{.*}}* @_ZTch0_v0_n24_N5Test31B1fEv(
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V2 *B::f() { return 0; }
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}
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namespace Test4 {
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// Check that the thunk for 'C::f' has the same visibility as the function itself.
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struct A {
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virtual void f();
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};
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struct B {
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virtual void f();
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};
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struct __attribute__((visibility("protected"))) C : A, B {
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virtual void c();
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virtual void f();
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};
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// CHECK-LABEL: define protected void @_ZThn8_N5Test41C1fEv(
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void C::f() { }
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}
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// Check that the thunk gets internal linkage.
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namespace Test4B {
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struct A {
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virtual void f();
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};
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struct B {
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virtual void f();
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};
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namespace {
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struct C : A, B {
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virtual void c();
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virtual void f();
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};
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}
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void C::c() {}
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void C::f() {}
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// Force C::f to be used.
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void f() {
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C c;
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c.f();
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}
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}
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namespace Test5 {
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// Check that the thunk for 'B::f' gets the same linkage as the function itself.
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struct A {
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virtual void f();
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};
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struct B : virtual A {
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virtual void f() { }
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};
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void f(B b) {
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b.f();
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}
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}
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namespace Test6 {
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struct X {
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X();
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X(const X&);
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X &operator=(const X&);
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~X();
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};
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struct P {
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P();
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P(const P&);
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~P();
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X first;
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X second;
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};
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P getP();
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struct Base1 {
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int i;
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virtual X f() { return X(); }
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};
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struct Base2 {
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float real;
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virtual X f() { return X(); }
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};
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struct Thunks : Base1, Base2 {
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long l;
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virtual X f();
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};
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// CHECK-LABEL: define void @_ZThn16_N5Test66Thunks1fEv
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// CHECK-NOT: memcpy
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// CHECK: {{call void @_ZN5Test66Thunks1fEv.*sret}}
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// CHECK: ret void
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X Thunks::f() { return X(); }
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}
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namespace Test7 {
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// PR7188
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struct X {
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X();
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X(const X&);
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X &operator=(const X&);
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~X();
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};
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struct Small { short s; };
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struct Large {
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char array[1024];
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};
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class A {
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protected:
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virtual void foo() = 0;
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};
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class B : public A {
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protected:
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virtual void bar() = 0;
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};
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class C : public A {
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protected:
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virtual void baz(X, X&, _Complex float, Small, Small&, Large) = 0;
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};
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class D : public B,
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public C {
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void foo() {}
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void bar() {}
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void baz(X, X&, _Complex float, Small, Small&, Large);
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};
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void D::baz(X, X&, _Complex float, Small, Small&, Large) { }
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// CHECK-LABEL: define void @_ZThn8_N5Test71D3bazENS_1XERS1_CfNS_5SmallERS4_NS_5LargeE(
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// CHECK-NOT: memcpy
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// CHECK: ret void
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void testD() { D d; }
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}
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namespace Test8 {
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struct NonPOD { ~NonPOD(); int x, y, z; };
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struct A { virtual void foo(); };
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struct B { virtual void bar(NonPOD); };
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struct C : A, B { virtual void bar(NonPOD); static void helper(NonPOD); };
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// CHECK: define void @_ZN5Test81C6helperENS_6NonPODE([[NONPODTYPE:%.*]]*
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void C::helper(NonPOD var) {}
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// CHECK-LABEL: define void @_ZThn8_N5Test81C3barENS_6NonPODE(
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// CHECK-NOT: load [[NONPODTYPE]], [[NONPODTYPE]]*
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// CHECK-NOT: memcpy
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// CHECK: ret void
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void C::bar(NonPOD var) {}
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}
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// PR7241: Emitting thunks for a method shouldn't require the vtable for
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// that class to be emitted.
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namespace Test9 {
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struct A { virtual ~A() { } };
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struct B : A { virtual void test() const {} };
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struct C : B { C(); ~C(); };
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struct D : C { D() {} };
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void test() {
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D d;
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}
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}
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namespace Test10 {
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struct A { virtual void foo(); };
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struct B { virtual void foo(); };
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struct C : A, B { void foo() {} };
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// Test later.
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void test() {
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C c;
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}
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}
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// PR7611
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namespace Test11 {
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struct A { virtual A* f(); };
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struct B : virtual A { virtual A* f(); };
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struct C : B { virtual C* f(); };
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C* C::f() { return 0; }
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// C::f itself.
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// CHECK: define {{.*}} @_ZN6Test111C1fEv(
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// The this-adjustment and return-adjustment thunk required when
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// C::f appears in a vtable where A is at a nonzero offset from C.
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// CHECK: define {{.*}} @_ZTcv0_n24_v0_n32_N6Test111C1fEv(
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// The return-adjustment thunk required when C::f appears in a vtable
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// where A is at a zero offset from C.
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// CHECK: define {{.*}} @_ZTch0_v0_n32_N6Test111C1fEv(
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}
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// Varargs thunk test.
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namespace Test12 {
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struct A {
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virtual A* f(int x, ...);
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};
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struct B {
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virtual B* f(int x, ...);
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};
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struct C : A, B {
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virtual void c();
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virtual C* f(int x, ...);
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};
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C* C::f(int x, ...) { return this; }
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// C::f
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// CHECK: define {{.*}} @_ZN6Test121C1fEiz
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// Varargs thunk; check that both the this and covariant adjustments
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// are generated.
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// CHECK: define {{.*}} @_ZTchn8_h8_N6Test121C1fEiz
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// CHECK: getelementptr inbounds i8, i8* {{.*}}, i64 -8
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// CHECK: getelementptr inbounds i8, i8* {{.*}}, i64 8
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}
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// PR13832
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namespace Test13 {
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struct B1 {
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virtual B1 &foo1();
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};
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struct Pad1 {
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virtual ~Pad1();
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};
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struct Proxy1 : Pad1, B1 {
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virtual ~Proxy1();
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};
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struct D : virtual Proxy1 {
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virtual ~D();
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virtual D &foo1();
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};
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D& D::foo1() {
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return *this;
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}
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// CHECK: define {{.*}} @_ZTcvn8_n32_v8_n24_N6Test131D4foo1Ev
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// CHECK: getelementptr inbounds i8, i8* {{.*}}, i64 -8
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// CHECK: getelementptr inbounds i8, i8* {{.*}}, i64 -32
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// CHECK: getelementptr inbounds i8, i8* {{.*}}, i64 -24
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// CHECK: getelementptr inbounds i8, i8* {{.*}}, i64 8
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// CHECK: ret %"struct.Test13::D"*
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}
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namespace Test14 {
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class A {
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virtual void f();
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};
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class B {
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virtual void f();
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};
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class C : public A, public B {
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virtual void f();
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};
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void C::f() {
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}
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// CHECK: define void @_ZThn8_N6Test141C1fEv({{.*}}) unnamed_addr [[NUW:#[0-9]+]]
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}
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// Varargs non-covariant thunk test.
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// PR18098
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namespace Test15 {
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struct A {
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virtual ~A();
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};
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struct B {
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virtual void f(int x, ...);
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};
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struct C : A, B {
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virtual void c();
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virtual void f(int x, ...);
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};
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void C::c() {}
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// C::c
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// CHECK: declare void @_ZN6Test151C1fEiz
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// non-virtual thunk to C::f
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// CHECK: declare void @_ZThn8_N6Test151C1fEiz
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}
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namespace Test16 {
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struct A {
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virtual ~A();
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};
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struct B {
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virtual void foo();
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};
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struct C : public A, public B {
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void foo() {}
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};
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struct D : public C {
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~D();
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};
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D::~D() {}
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// CHECK: define linkonce_odr void @_ZThn8_N6Test161C3fooEv({{.*}}) {{.*}} comdat
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}
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/**** The following has to go at the end of the file ****/
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// This is from Test5:
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// CHECK-LABEL: define internal void @_ZThn8_N6Test4B12_GLOBAL__N_11C1fEv(
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// CHECK-NOT: comdat
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// CHECK-LABEL: define linkonce_odr void @_ZTv0_n24_N5Test51B1fEv
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// This is from Test10:
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// CHECK-LABEL: define linkonce_odr void @_ZN6Test101C3fooEv
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// CHECK-LABEL: define linkonce_odr void @_ZThn8_N6Test101C3fooEv
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// CHECK: attributes [[NUW]] = { nounwind uwtable{{.*}} }
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