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// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -emit-llvm -o %t.ll -O1 -disable-llvm-passes -fms-extensions -fstrict-vtable-pointers
// RUN: %clang_cc1 %s -triple i686-pc-win32 -emit-llvm -o %t.ms.ll -O1 -disable-llvm-passes -fms-extensions -fstrict-vtable-pointers
// FIXME: Assume load should not require -fstrict-vtable-pointers
// RUN: FileCheck --check-prefix=CHECK1 --input-file=%t.ll %s
// RUN: FileCheck --check-prefix=CHECK2 --input-file=%t.ll %s
// RUN: FileCheck --check-prefix=CHECK3 --input-file=%t.ll %s
// RUN: FileCheck --check-prefix=CHECK4 --input-file=%t.ll %s
// RUN: FileCheck --check-prefix=CHECK-MS --input-file=%t.ms.ll %s
// RUN: FileCheck --check-prefix=CHECK6 --input-file=%t.ll %s
// RUN: FileCheck --check-prefix=CHECK7 --input-file=%t.ll %s
// RUN: FileCheck --check-prefix=CHECK8 --input-file=%t.ll %s
// RUN: FileCheck --check-prefix=CHECK9 --input-file=%t.ll %s
namespace test1 {
struct A {
A();
virtual void foo();
};
struct B : A {
virtual void foo();
};
void g(A *a) { a->foo(); }
// CHECK1-LABEL: define void @_ZN5test14fooAEv()
// CHECK1: call void @_ZN5test11AC1Ev(%"struct.test1::A"*
// CHECK1: %[[VTABLE:.*]] = load i8**, i8*** %{{.*}}
// CHECK1: %[[CMP:.*]] = icmp eq i8** %[[VTABLE]], getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTVN5test11AE, i32 0, inrange i32 0, i32 2)
// CHECK1: call void @llvm.assume(i1 %[[CMP]])
// CHECK1-LABEL: {{^}}}
void fooA() {
A a;
g(&a);
}
// CHECK1-LABEL: define void @_ZN5test14fooBEv()
// CHECK1: call void @_ZN5test11BC1Ev(%"struct.test1::B"* %{{.*}})
// CHECK1: %[[VTABLE:.*]] = load i8**, i8*** %{{.*}}
// CHECK1: %[[CMP:.*]] = icmp eq i8** %[[VTABLE]], getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTVN5test11BE, i32 0, inrange i32 0, i32 2)
// CHECK1: call void @llvm.assume(i1 %[[CMP]])
// CHECK1-LABEL: {{^}}}
void fooB() {
B b;
g(&b);
}
// there should not be any assumes in the ctor that calls base ctor
// CHECK1-LABEL: define linkonce_odr void @_ZN5test11BC2Ev(%"struct.test1::B"*
// CHECK1-NOT: @llvm.assume(
// CHECK1-LABEL: {{^}}}
}
namespace test2 {
struct A {
A();
virtual void foo();
};
struct B {
B();
virtual void bar();
};
struct C : A, B {
C();
virtual void foo();
};
void g(A *a) { a->foo(); }
void h(B *b) { b->bar(); }
// CHECK2-LABEL: define void @_ZN5test24testEv()
// CHECK2: call void @_ZN5test21CC1Ev(%"struct.test2::C"*
// CHECK2: %[[VTABLE:.*]] = load i8**, i8*** {{.*}}
// CHECK2: %[[CMP:.*]] = icmp eq i8** %[[VTABLE]], getelementptr inbounds ({ [3 x i8*], [3 x i8*] }, { [3 x i8*], [3 x i8*] }* @_ZTVN5test21CE, i32 0, inrange i32 0, i32 2)
// CHECK2: call void @llvm.assume(i1 %[[CMP]])
// CHECK2: %[[V2:.*]] = bitcast %"struct.test2::C"* %{{.*}} to i8*
// CHECK2: %[[ADD_PTR:.*]] = getelementptr inbounds i8, i8* %[[V2]], i64 8
// CHECK2: %[[V3:.*]] = bitcast i8* %[[ADD_PTR]] to i8***
// CHECK2: %[[VTABLE2:.*]] = load i8**, i8*** %[[V3]]
// CHECK2: %[[CMP2:.*]] = icmp eq i8** %[[VTABLE2]], getelementptr inbounds ({ [3 x i8*], [3 x i8*] }, { [3 x i8*], [3 x i8*] }* @_ZTVN5test21CE, i32 0, inrange i32 1, i32 2)
// CHECK2: call void @llvm.assume(i1 %[[CMP2]])
// CHECK2: call void @_ZN5test21gEPNS_1AE(
// CHECK2-LABEL: {{^}}}
void test() {
C c;
g(&c);
h(&c);
}
}
namespace test3 {
struct A {
A();
};
struct B : A {
B();
virtual void foo();
};
struct C : virtual A, B {
C();
virtual void foo();
};
void g(B *a) { a->foo(); }
// CHECK3-LABEL: define void @_ZN5test34testEv()
// CHECK3: call void @_ZN5test31CC1Ev(%"struct.test3::C"*
// CHECK3: %[[CMP:.*]] = icmp eq i8** %{{.*}}, getelementptr inbounds ({ [4 x i8*] }, { [4 x i8*] }* @_ZTVN5test31CE, i32 0, inrange i32 0, i32 3)
// CHECK3: call void @llvm.assume(i1 %[[CMP]])
// CHECK3-LABLEL: }
void test() {
C c;
g(&c);
}
} // test3
namespace test4 {
struct A {
A();
virtual void foo();
};
struct B : virtual A {
B();
virtual void foo();
};
struct C : B {
C();
virtual void foo();
};
void g(C *c) { c->foo(); }
// CHECK4-LABEL: define void @_ZN5test44testEv()
// CHECK4: call void @_ZN5test41CC1Ev(%"struct.test4::C"*
// CHECK4: %[[VTABLE:.*]] = load i8**, i8*** %{{.*}}
// CHECK4: %[[CMP:.*]] = icmp eq i8** %[[VTABLE]], getelementptr inbounds ({ [5 x i8*] }, { [5 x i8*] }* @_ZTVN5test41CE, i32 0, inrange i32 0, i32 4)
// CHECK4: call void @llvm.assume(i1 %[[CMP]]
// CHECK4: %[[VTABLE2:.*]] = load i8**, i8*** %{{.*}}
// CHECK4: %[[CMP2:.*]] = icmp eq i8** %[[VTABLE2]], getelementptr inbounds ({ [5 x i8*] }, { [5 x i8*] }* @_ZTVN5test41CE, i32 0, inrange i32 0, i32 4)
// CHECK4: call void @llvm.assume(i1 %[[CMP2]])
// CHECK4-LABEL: {{^}}}
void test() {
C c;
g(&c);
}
} // test4
namespace testMS {
struct __declspec(novtable) S {
virtual void foo();
};
void g(S &s) { s.foo(); }
// if struct has novtable specifier, then we can't generate assumes
// CHECK-MS-LABEL: define dso_local void @"?test@testMS@@YAXXZ"()
// CHECK-MS: call x86_thiscallcc %"struct.testMS::S"* @"??0S@testMS@@QAE@XZ"(
// CHECK-MS-NOT: @llvm.assume
// CHECK-MS-LABEL: {{^}}}
void test() {
S s;
g(s);
}
} // testMS
namespace test6 {
struct A {
A();
virtual void foo();
virtual ~A() {}
};
struct B : A {
B();
};
// FIXME: Because A's vtable is external, and no virtual functions are hidden,
// it's safe to generate assumption loads.
// CHECK6-LABEL: define void @_ZN5test61gEv()
// CHECK6: call void @_ZN5test61AC1Ev(
// CHECK6-NOT: call void @llvm.assume(
// We can't emit assumption loads for B, because if we would refer to vtable
// it would refer to functions that will not be able to find (like implicit
// inline destructor).
// CHECK6-LABEL: call void @_ZN5test61BC1Ev(
// CHECK6-NOT: call void @llvm.assume(
// CHECK6-LABEL: {{^}}}
void g() {
A *a = new A;
B *b = new B;
}
}
namespace test7 {
// Because A's key function is defined here, vtable is generated in this TU
// CHECK7: @_ZTVN5test71AE = unnamed_addr constant
struct A {
A();
virtual void foo();
virtual void bar();
};
void A::foo() {}
// CHECK7-LABEL: define void @_ZN5test71gEv()
// CHECK7: call void @_ZN5test71AC1Ev(
// CHECK7: call void @llvm.assume(
// CHECK7-LABEL: {{^}}}
void g() {
A *a = new A();
a->bar();
}
}
namespace test8 {
struct A {
virtual void foo();
virtual void bar();
};
// CHECK8-DAG: @_ZTVN5test81BE = available_externally unnamed_addr constant
struct B : A {
B();
void foo();
void bar();
};
// CHECK8-DAG: @_ZTVN5test81CE = linkonce_odr unnamed_addr constant
struct C : A {
C();
void bar();
void foo() {}
};
inline void C::bar() {}
struct D : A {
D();
void foo();
void inline bar();
};
void D::bar() {}
// CHECK8-DAG: @_ZTVN5test81EE = linkonce_odr unnamed_addr constant
struct E : A {
E();
};
// CHECK8-LABEL: define void @_ZN5test81bEv()
// CHECK8: call void @llvm.assume(
// CHECK8-LABEL: {{^}}}
void b() {
B b;
b.bar();
}
// FIXME: C has inline virtual functions which prohibits as from generating
// assumption loads, but because vtable is generated in this TU (key function
// defined here) it would be correct to refer to it.
// CHECK8-LABEL: define void @_ZN5test81cEv()
// CHECK8-NOT: call void @llvm.assume(
// CHECK8-LABEL: {{^}}}
void c() {
C c;
c.bar();
}
// FIXME: We could generate assumption loads here.
// CHECK8-LABEL: define void @_ZN5test81dEv()
// CHECK8-NOT: call void @llvm.assume(
// CHECK8-LABEL: {{^}}}
void d() {
D d;
d.bar();
}
// CHECK8-LABEL: define void @_ZN5test81eEv()
// CHECK8: call void @llvm.assume(
// CHECK8-LABEL: {{^}}}
void e() {
E e;
e.bar();
}
}
namespace test9 {
struct S {
S();
__attribute__((visibility("hidden"))) virtual void doStuff();
};
// CHECK9-LABEL: define void @_ZN5test94testEv()
// CHECK9-NOT: @llvm.assume(
// CHECK9: }
void test() {
S *s = new S();
s->doStuff();
delete s;
}
}
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