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// RUN: %clang_cc1 %s -I%S -triple=x86_64-apple-darwin10 -fstrict-vtable-pointers -std=c++11 -disable-llvm-passes -O2 -emit-llvm -o %t.ll
// RUN: FileCheck --check-prefix=CHECK-CTORS %s < %t.ll
// RUN: FileCheck --check-prefix=CHECK-NEW %s < %t.ll
// RUN: FileCheck --check-prefix=CHECK-DTORS %s < %t.ll
// RUN: FileCheck --check-prefix=CHECK-LINK-REQ %s < %t.ll
typedef __typeof__(sizeof(0)) size_t;
void *operator new(size_t, void*) throw();
struct NotTrivialDtor {
~NotTrivialDtor();
};
struct DynamicBase1 {
NotTrivialDtor obj;
virtual void foo();
};
struct DynamicDerived : DynamicBase1 {
void foo();
};
struct DynamicBase2 {
virtual void bar();
~DynamicBase2() {
bar();
}
};
struct DynamicDerivedMultiple : DynamicBase1, DynamicBase2 {
virtual void foo();
virtual void bar();
};
struct StaticBase {
NotTrivialDtor obj;
void bar();
};
struct DynamicFromStatic : StaticBase {
virtual void bar();
};
struct DynamicFromVirtualStatic1 : virtual StaticBase {
};
struct DynamicFromVirtualStatic2 : virtual StaticBase {
};
struct DynamicFrom2Virtuals :
DynamicFromVirtualStatic1,
DynamicFromVirtualStatic2 {
};
// CHECK-NEW-LABEL: define void @_Z12LocalObjectsv()
// CHECK-NEW-NOT: @llvm.invariant.group.barrier.p0i8(
// CHECK-NEW-LABEL: {{^}}}
void LocalObjects() {
DynamicBase1 DB;
DB.foo();
DynamicDerived DD;
DD.foo();
DynamicBase2 DB2;
DB2.bar();
StaticBase SB;
SB.bar();
DynamicDerivedMultiple DDM;
DDM.foo();
DDM.bar();
DynamicFromStatic DFS;
DFS.bar();
DynamicFromVirtualStatic1 DFVS1;
DFVS1.bar();
DynamicFrom2Virtuals DF2V;
DF2V.bar();
}
struct DynamicFromVirtualStatic1;
// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN25DynamicFromVirtualStatic1C1Ev
// CHECK-CTORS-NOT: @llvm.invariant.group.barrier.p0i8(
// CHECK-CTORS-LABEL: {{^}}}
struct DynamicFrom2Virtuals;
// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN20DynamicFrom2VirtualsC1Ev
// CHECK-CTORS: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-CTORS-LABEL: {{^}}}
// CHECK-NEW-LABEL: define void @_Z9Pointers1v()
// CHECK-NEW-NOT: @llvm.invariant.group.barrier.p0i8(
// CHECK-NEW-LABEL: call void @_ZN12DynamicBase1C1Ev(
// CHECK-NEW: %[[THIS3:.*]] = call i8* @llvm.invariant.group.barrier.p0i8(i8* %[[THIS2:.*]])
// CHECK-NEW: %[[THIS4:.*]] = bitcast i8* %[[THIS3]] to %[[DynamicDerived:.*]]*
// CHECK-NEW: call void @_ZN14DynamicDerivedC1Ev(%[[DynamicDerived:.*]]* %[[THIS4]])
// CHECK-NEW-LABEL: {{^}}}
void Pointers1() {
DynamicBase1 *DB = new DynamicBase1;
DB->foo();
DynamicDerived *DD = new (DB) DynamicDerived;
DD->foo();
DD->~DynamicDerived();
}
// CHECK-NEW-LABEL: define void @_Z14HackingObjectsv()
// CHECK-NEW: call void @_ZN12DynamicBase1C1Ev
// CHECK-NEW: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-NEW: call void @_ZN14DynamicDerivedC1Ev(
// CHECK-NEW: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-NEW: call void @_ZN12DynamicBase1C1Ev(
// CHECK-NEW-LABEL: {{^}}}
void HackingObjects() {
DynamicBase1 DB;
DB.foo();
DynamicDerived *DB2 = new (&DB) DynamicDerived;
// Using DB now is prohibited.
DB2->foo();
DB2->~DynamicDerived();
// We have to get back to the previous type to avoid calling wrong destructor
new (&DB) DynamicBase1;
DB.foo();
}
/*** Testing Constructors ***/
struct DynamicBase1;
// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN12DynamicBase1C2Ev(
// CHECK-CTORS-NOT: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-CTORS-LABEL: {{^}}}
struct DynamicDerived;
// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN14DynamicDerivedC2Ev(
// CHECK-CTORS: %[[THIS0:.*]] = load %[[DynamicDerived:.*]]*, %[[DynamicDerived]]** {{.*}}
// CHECK-CTORS: %[[THIS1:.*]] = bitcast %[[DynamicDerived:.*]]* %[[THIS0]] to i8*
// CHECK-CTORS: %[[THIS2:.*]] = call i8* @llvm.invariant.group.barrier.p0i8(i8* %[[THIS1:.*]])
// CHECK-CTORS: %[[THIS3:.*]] = bitcast i8* %[[THIS2]] to %[[DynamicDerived]]*
// CHECK-CTORS: %[[THIS4:.*]] = bitcast %[[DynamicDerived]]* %[[THIS3]] to %[[DynamicBase:.*]]*
// CHECK-CTORS: call void @_ZN12DynamicBase1C2Ev(%[[DynamicBase]]* %[[THIS4]])
// CHECK-CTORS: %[[THIS5:.*]] = bitcast %struct.DynamicDerived* %[[THIS0]] to i32 (...)***
// CHECK-CTORS: store {{.*}} %[[THIS5]]
// CHECK-CTORS-LABEL: {{^}}}
struct DynamicDerivedMultiple;
// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN22DynamicDerivedMultipleC2Ev(
// CHECK-CTORS: %[[THIS0:.*]] = load %[[CLASS:.*]]*, %[[CLASS]]** {{.*}}
// CHECK-CTORS: %[[THIS1:.*]] = bitcast %[[CLASS:.*]]* %[[THIS0]] to i8*
// CHECK-CTORS: %[[THIS2:.*]] = call i8* @llvm.invariant.group.barrier.p0i8(i8* %[[THIS1]])
// CHECK-CTORS: %[[THIS3:.*]] = bitcast i8* %[[THIS2]] to %[[CLASS]]*
// CHECK-CTORS: %[[THIS4:.*]] = bitcast %[[CLASS]]* %[[THIS3]] to %[[BASE_CLASS:.*]]*
// CHECK-CTORS: call void @_ZN12DynamicBase1C2Ev(%[[BASE_CLASS]]* %[[THIS4]])
// CHECK-CTORS: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-CTORS: call void @_ZN12DynamicBase2C2Ev(
// CHECK-CTORS-NOT: @llvm.invariant.group.barrier.p0i8
// CHECK-CTORS: %[[THIS10:.*]] = bitcast %struct.DynamicDerivedMultiple* %[[THIS0]] to i32 (...)***
// CHECK-CTORS: store {{.*}} @_ZTV22DynamicDerivedMultiple, i32 0, inrange i32 0, i32 2) {{.*}} %[[THIS10]]
// CHECK-CTORS: %[[THIS11:.*]] = bitcast %struct.DynamicDerivedMultiple* %[[THIS0]] to i8*
// CHECK-CTORS: %[[THIS_ADD:.*]] = getelementptr inbounds i8, i8* %[[THIS11]], i64 16
// CHECK-CTORS: %[[THIS12:.*]] = bitcast i8* %[[THIS_ADD]] to i32 (...)***
// CHECK-CTORS: store {{.*}} @_ZTV22DynamicDerivedMultiple, i32 0, inrange i32 1, i32 2) {{.*}} %[[THIS12]]
// CHECK-CTORS-LABEL: {{^}}}
struct DynamicFromStatic;
// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN17DynamicFromStaticC2Ev(
// CHECK-CTORS-NOT: @llvm.invariant.group.barrier.p0i8(
// CHECK-CTORS-LABEL: {{^}}}
struct A {
virtual void foo();
};
struct B : A {
virtual void foo();
};
union U {
A a;
B b;
};
void changeToB(U *u);
void changeToA(U *u);
void g2(A *a) {
a->foo();
}
// We have to guard access to union fields with invariant.group, because
// it is very easy to skip the barrier with unions. In this example the inlined
// g2 will produce loads with the same !invariant.group metadata, and
// u->a and u->b would use the same pointer.
// CHECK-NEW-LABEL: define void @_Z14UnionsBarriersP1U
void UnionsBarriers(U *u) {
// CHECK-NEW: call void @_Z9changeToBP1U(
changeToB(u);
// CHECK-NEW: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: call void @_Z2g2P1A(%struct.A*
g2(&u->b);
// CHECK-NEW: call void @_Z9changeToAP1U(%union.U*
changeToA(u);
// CHECK-NEW: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// call void @_Z2g2P1A(%struct.A* %a)
g2(&u->a);
// CHECK-NEW-NOT: call i8* @llvm.invariant.group.barrier.p0i8(i8*
}
struct HoldingVirtuals {
A a;
};
struct Empty {};
struct AnotherEmpty {
Empty e;
};
union NoVptrs {
int a;
AnotherEmpty empty;
};
void take(AnotherEmpty &);
// CHECK-NEW-LABEL: noBarriers
void noBarriers(NoVptrs &noVptrs) {
// CHECK-NEW-NOT: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: 42
noVptrs.a += 42;
// CHECK-NEW-NOT: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: call void @_Z4takeR12AnotherEmpty(
take(noVptrs.empty);
}
union U2 {
HoldingVirtuals h;
int z;
};
void take(HoldingVirtuals &);
// CHECK-NEW-LABEL: define void @_Z15UnionsBarriers2R2U2
void UnionsBarriers2(U2 &u) {
// CHECK-NEW-NOT: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: 42
u.z += 42;
// CHECK-NEW: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: call void @_Z4takeR15HoldingVirtuals(
take(u.h);
}
struct VirtualInBase : HoldingVirtuals, Empty {
};
struct VirtualInVBase : virtual Empty, virtual HoldingVirtuals {
};
// It has vtable by virtual inheritance.
struct VirtualInheritance : virtual Empty {
};
union U3 {
VirtualInBase v1;
VirtualInBase v2;
VirtualInheritance v3;
int z;
};
void take(VirtualInBase &);
void take(VirtualInVBase &);
void take(VirtualInheritance &);
void UnionsBarrier3(U3 &u) {
// CHECK-NEW-NOT: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: 42
u.z += 42;
// CHECK-NEW: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: call void @_Z4takeR13VirtualInBase(
take(u.v1);
// CHECK-NEW: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: call void @_Z4takeR13VirtualInBase(
take(u.v2);
// CHECK-NEW: call i8* @llvm.invariant.group.barrier.p0i8(i8*
// CHECK-NEW: call void @_Z4takeR18VirtualInheritance(
take(u.v3);
}
/** DTORS **/
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN10StaticBaseD2Ev(
// CHECK-DTORS-NOT: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-DTORS-LABEL: {{^}}}
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN25DynamicFromVirtualStatic2D2Ev(
// CHECK-DTORS-NOT: invariant.barrier
// CHECK-DTORS-LABEL: {{^}}}
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN17DynamicFromStaticD2Ev
// CHECK-DTORS-NOT: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-DTORS-LABEL: {{^}}}
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN22DynamicDerivedMultipleD2Ev(
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN12DynamicBase2D2Ev(
// CHECK-DTORS: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-DTORS-LABEL: {{^}}}
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN12DynamicBase1D2Ev
// CHECK-DTORS: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-DTORS-LABEL: {{^}}}
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN14DynamicDerivedD2Ev
// CHECK-DTORS-NOT: call i8* @llvm.invariant.group.barrier.p0i8(
// CHECK-DTORS-LABEL: {{^}}}
// CHECK-LINK-REQ: !llvm.module.flags = !{![[FIRST:[0-9]+]], ![[SEC:[0-9]+]]{{.*}}}
// CHECK-LINK-REQ: ![[FIRST]] = !{i32 1, !"StrictVTablePointers", i32 1}
// CHECK-LINK-REQ: ![[SEC]] = !{i32 3, !"StrictVTablePointersRequirement", ![[META:.*]]}
// CHECK-LINK-REQ: ![[META]] = !{!"StrictVTablePointers", i32 1}
|
