forked from OSchip/llvm-project
333 lines
9.8 KiB
C++
333 lines
9.8 KiB
C++
// 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.launder.invariant.group.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.launder.invariant.group.p0i8(
|
|
// CHECK-CTORS-LABEL: {{^}}}
|
|
|
|
struct DynamicFrom2Virtuals;
|
|
// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN20DynamicFrom2VirtualsC1Ev
|
|
// CHECK-CTORS: call i8* @llvm.launder.invariant.group.p0i8(
|
|
// CHECK-CTORS-LABEL: {{^}}}
|
|
|
|
|
|
// CHECK-NEW-LABEL: define void @_Z9Pointers1v()
|
|
// CHECK-NEW-NOT: @llvm.launder.invariant.group.p0i8(
|
|
// CHECK-NEW-LABEL: call void @_ZN12DynamicBase1C1Ev(
|
|
|
|
// CHECK-NEW: %[[THIS3:.*]] = call i8* @llvm.launder.invariant.group.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.launder.invariant.group.p0i8(
|
|
// CHECK-NEW: call void @_ZN14DynamicDerivedC1Ev(
|
|
// CHECK-NEW: call i8* @llvm.launder.invariant.group.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.launder.invariant.group.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.launder.invariant.group.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.launder.invariant.group.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.launder.invariant.group.p0i8(
|
|
|
|
// CHECK-CTORS: call void @_ZN12DynamicBase2C2Ev(
|
|
// CHECK-CTORS-NOT: @llvm.launder.invariant.group.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.launder.invariant.group.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.launder.invariant.group.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.launder.invariant.group.p0i8(i8*
|
|
// call void @_Z2g2P1A(%struct.A* %a)
|
|
g2(&u->a);
|
|
// CHECK-NEW-NOT: call i8* @llvm.launder.invariant.group.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.launder.invariant.group.p0i8(i8*
|
|
// CHECK-NEW: 42
|
|
noVptrs.a += 42;
|
|
// CHECK-NEW-NOT: call i8* @llvm.launder.invariant.group.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.launder.invariant.group.p0i8(i8*
|
|
// CHECK-NEW: 42
|
|
u.z += 42;
|
|
// CHECK-NEW: call i8* @llvm.launder.invariant.group.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.launder.invariant.group.p0i8(i8*
|
|
// CHECK-NEW: 42
|
|
u.z += 42;
|
|
// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
|
|
// CHECK-NEW: call void @_Z4takeR13VirtualInBase(
|
|
take(u.v1);
|
|
// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
|
|
// CHECK-NEW: call void @_Z4takeR13VirtualInBase(
|
|
take(u.v2);
|
|
|
|
// CHECK-NEW: call i8* @llvm.launder.invariant.group.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.launder.invariant.group.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.launder.invariant.group.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.launder.invariant.group.p0i8(
|
|
// CHECK-DTORS-LABEL: {{^}}}
|
|
|
|
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN12DynamicBase1D2Ev
|
|
// CHECK-DTORS: call i8* @llvm.launder.invariant.group.p0i8(
|
|
// CHECK-DTORS-LABEL: {{^}}}
|
|
|
|
// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN14DynamicDerivedD2Ev
|
|
// CHECK-DTORS-NOT: call i8* @llvm.launder.invariant.group.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}
|
|
|