forked from OSchip/llvm-project
294 lines
6.6 KiB
C++
294 lines
6.6 KiB
C++
// RUN: %clang_cc1 -triple i386-unknown-unknown -std=c++11 %s -emit-llvm -o - | FileCheck %s
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namespace Test1 {
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struct A {
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virtual int f() final;
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};
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// CHECK-LABEL: define i32 @_ZN5Test11fEPNS_1AE
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int f(A *a) {
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// CHECK: call i32 @_ZN5Test11A1fEv
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return a->f();
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}
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}
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namespace Test2 {
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struct A final {
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virtual int f();
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};
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// CHECK-LABEL: define i32 @_ZN5Test21fEPNS_1AE
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int f(A *a) {
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// CHECK: call i32 @_ZN5Test21A1fEv
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return a->f();
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}
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}
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namespace Test3 {
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struct A {
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virtual int f();
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};
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struct B final : A { };
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// CHECK-LABEL: define i32 @_ZN5Test31fEPNS_1BE
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int f(B *b) {
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// CHECK: call i32 @_ZN5Test31A1fEv
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return b->f();
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}
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// CHECK-LABEL: define i32 @_ZN5Test31fERNS_1BE
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int f(B &b) {
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// CHECK: call i32 @_ZN5Test31A1fEv
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return b.f();
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}
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// CHECK-LABEL: define i32 @_ZN5Test31fEPv
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int f(void *v) {
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// CHECK: call i32 @_ZN5Test31A1fEv
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return static_cast<B*>(v)->f();
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}
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}
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namespace Test4 {
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struct A {
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virtual void f();
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virtual int operator-();
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};
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struct B final : A {
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virtual void f();
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virtual int operator-();
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};
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// CHECK-LABEL: define void @_ZN5Test41fEPNS_1BE
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void f(B* d) {
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// CHECK: call void @_ZN5Test41B1fEv
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static_cast<A*>(d)->f();
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// CHECK: call i32 @_ZN5Test41BngEv
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-static_cast<A&>(*d);
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}
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}
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namespace Test5 {
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struct A {
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virtual void f();
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virtual int operator-();
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};
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struct B : A {
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virtual void f();
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virtual int operator-();
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};
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struct C final : B {
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};
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// CHECK-LABEL: define void @_ZN5Test51fEPNS_1CE
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void f(C* d) {
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// FIXME: It should be possible to devirtualize this case, but that is
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// not implemented yet.
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// CHECK: getelementptr
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// CHECK-NEXT: %[[FUNC:.*]] = load
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// CHECK-NEXT: call void %[[FUNC]]
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static_cast<A*>(d)->f();
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}
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// CHECK-LABEL: define void @_ZN5Test53fopEPNS_1CE
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void fop(C* d) {
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// FIXME: It should be possible to devirtualize this case, but that is
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// not implemented yet.
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// CHECK: getelementptr
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// CHECK-NEXT: %[[FUNC:.*]] = load
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// CHECK-NEXT: call i32 %[[FUNC]]
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-static_cast<A&>(*d);
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}
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}
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namespace Test6 {
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struct A {
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virtual ~A();
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};
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struct B : public A {
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virtual ~B();
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};
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struct C {
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virtual ~C();
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};
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struct D final : public C, public B {
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};
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// CHECK-LABEL: define void @_ZN5Test61fEPNS_1DE
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void f(D* d) {
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// CHECK: call void @_ZN5Test61DD1Ev
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static_cast<A*>(d)->~A();
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}
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}
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namespace Test7 {
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struct foo {
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virtual void g() {}
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};
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struct bar {
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virtual int f() { return 0; }
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};
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struct zed final : public foo, public bar {
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int z;
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virtual int f() {return z;}
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};
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// CHECK-LABEL: define i32 @_ZN5Test71fEPNS_3zedE
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int f(zed *z) {
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// CHECK: alloca
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// CHECK-NEXT: store
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// CHECK-NEXT: load
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// CHECK-NEXT: call i32 @_ZN5Test73zed1fEv
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// CHECK-NEXT: ret
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return static_cast<bar*>(z)->f();
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}
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}
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namespace Test8 {
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struct A { virtual ~A() {} };
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struct B {
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int b;
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virtual int foo() { return b; }
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};
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struct C final : A, B { };
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// CHECK-LABEL: define i32 @_ZN5Test84testEPNS_1CE
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int test(C *c) {
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// CHECK: %[[THIS:.*]] = phi
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// CHECK-NEXT: call i32 @_ZN5Test81B3fooEv(%"struct.Test8::B"* %[[THIS]])
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return static_cast<B*>(c)->foo();
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}
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}
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namespace Test9 {
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struct A {
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int a;
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};
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struct B {
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int b;
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};
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struct C : public B, public A {
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};
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struct RA {
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virtual A *f() {
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return 0;
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}
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virtual A *operator-() {
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return 0;
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}
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};
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struct RC final : public RA {
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virtual C *f() {
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C *x = new C();
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x->a = 1;
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x->b = 2;
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return x;
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}
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virtual C *operator-() {
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C *x = new C();
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x->a = 1;
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x->b = 2;
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return x;
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}
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};
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// CHECK: define {{.*}} @_ZN5Test91fEPNS_2RCE
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A *f(RC *x) {
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// FIXME: It should be possible to devirtualize this case, but that is
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// not implemented yet.
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// CHECK: load
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// CHECK: bitcast
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// CHECK: [[F_PTR_RA:%.+]] = bitcast
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// CHECK: [[VTABLE:%.+]] = load {{.+}} [[F_PTR_RA]]
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// CHECK: [[VFN:%.+]] = getelementptr inbounds {{.+}} [[VTABLE]], i{{[0-9]+}} 0
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// CHECK-NEXT: %[[FUNC:.*]] = load {{.+}} [[VFN]]
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// CHECK-NEXT: = call {{.*}} %[[FUNC]]
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return static_cast<RA*>(x)->f();
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}
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// CHECK: define {{.*}} @_ZN5Test93fopEPNS_2RCE
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A *fop(RC *x) {
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// FIXME: It should be possible to devirtualize this case, but that is
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// not implemented yet.
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// CHECK: load
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// CHECK: bitcast
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// CHECK: [[F_PTR_RA:%.+]] = bitcast
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// CHECK: [[VTABLE:%.+]] = load {{.+}} [[F_PTR_RA]]
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// CHECK: [[VFN:%.+]] = getelementptr inbounds {{.+}} [[VTABLE]], i{{[0-9]+}} 1
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// CHECK-NEXT: %[[FUNC:.*]] = load {{.+}} [[VFN]]
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// CHECK-NEXT: = call {{.*}} %[[FUNC]]
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return -static_cast<RA&>(*x);
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}
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}
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namespace Test10 {
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struct A {
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virtual int f();
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};
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struct B : A {
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int f() final;
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};
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// CHECK-LABEL: define i32 @_ZN6Test101fEPNS_1BE
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int f(B *b) {
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// CHECK: call i32 @_ZN6Test101B1fEv
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return static_cast<A *>(b)->f();
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}
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}
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namespace Test11 {
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// Check that the definitions of Derived's operators are emitted.
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// CHECK-LABEL: define linkonce_odr void @_ZN6Test111SIiE4foo1Ev(
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// CHECK: call void @_ZN6Test111SIiE7DerivedclEv(
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// CHECK: call zeroext i1 @_ZN6Test111SIiE7DerivedeqERKNS_4BaseE(
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// CHECK: call zeroext i1 @_ZN6Test111SIiE7DerivedntEv(
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// CHECK: call dereferenceable(4) %"class.Test11::Base"* @_ZN6Test111SIiE7DerivedixEi(
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// CHECK: define linkonce_odr void @_ZN6Test111SIiE7DerivedclEv(
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// CHECK: define linkonce_odr zeroext i1 @_ZN6Test111SIiE7DerivedeqERKNS_4BaseE(
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// CHECK: define linkonce_odr zeroext i1 @_ZN6Test111SIiE7DerivedntEv(
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// CHECK: define linkonce_odr dereferenceable(4) %"class.Test11::Base"* @_ZN6Test111SIiE7DerivedixEi(
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class Base {
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public:
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virtual void operator()() {}
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virtual bool operator==(const Base &other) { return false; }
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virtual bool operator!() { return false; }
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virtual Base &operator[](int i) { return *this; }
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};
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template<class T>
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struct S {
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class Derived final : public Base {
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public:
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void operator()() override {}
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bool operator==(const Base &other) override { return true; }
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bool operator!() override { return true; }
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Base &operator[](int i) override { return *this; }
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};
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Derived *ptr = nullptr, *ptr2 = nullptr;
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void foo1() {
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if (ptr && ptr2) {
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// These calls get devirtualized. Linkage fails if the definitions of
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// the called functions are not emitted.
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(*ptr)();
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(void)(*ptr == *ptr2);
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(void)(!(*ptr));
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(void)((*ptr)[1]);
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}
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}
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};
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void foo2() {
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S<int> *s = new S<int>;
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s->foo1();
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}
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}
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