forked from OSchip/llvm-project
594 lines
18 KiB
C++
594 lines
18 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
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// RUN: FileCheck --check-prefix=CHECK-CTORS %s < %t.ll
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// RUN: FileCheck --check-prefix=CHECK-NEW %s < %t.ll
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// RUN: FileCheck --check-prefix=CHECK-DTORS %s < %t.ll
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// RUN: FileCheck --check-prefix=CHECK-LINK-REQ %s < %t.ll
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typedef __typeof__(sizeof(0)) size_t;
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void *operator new(size_t, void *) throw();
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using uintptr_t = unsigned long long;
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struct NotTrivialDtor {
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~NotTrivialDtor();
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};
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struct DynamicBase1 {
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NotTrivialDtor obj;
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virtual void foo();
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};
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struct DynamicDerived : DynamicBase1 {
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void foo() override;
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};
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struct DynamicBase2 {
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virtual void bar();
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~DynamicBase2() {
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bar();
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}
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};
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struct DynamicDerivedMultiple : DynamicBase1, DynamicBase2 {
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void foo() override;
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void bar() override;
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};
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struct StaticBase {
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NotTrivialDtor obj;
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void bar();
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};
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struct DynamicFromStatic : StaticBase {
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virtual void bar();
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};
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struct DynamicFromVirtualStatic1 : virtual StaticBase {
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};
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struct DynamicFromVirtualStatic2 : virtual StaticBase {
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};
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struct DynamicFrom2Virtuals : DynamicFromVirtualStatic1,
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DynamicFromVirtualStatic2 {
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};
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// CHECK-NEW-LABEL: define void @_Z12LocalObjectsv()
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// CHECK-NEW-NOT: @llvm.launder.invariant.group.p0i8(
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// CHECK-NEW-LABEL: {{^}}}
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void LocalObjects() {
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DynamicBase1 DB;
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DB.foo();
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DynamicDerived DD;
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DD.foo();
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DynamicBase2 DB2;
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DB2.bar();
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StaticBase SB;
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SB.bar();
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DynamicDerivedMultiple DDM;
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DDM.foo();
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DDM.bar();
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DynamicFromStatic DFS;
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DFS.bar();
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DynamicFromVirtualStatic1 DFVS1;
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DFVS1.bar();
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DynamicFrom2Virtuals DF2V;
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DF2V.bar();
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}
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struct DynamicFromVirtualStatic1;
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// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN25DynamicFromVirtualStatic1C1Ev
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// CHECK-CTORS-NOT: @llvm.launder.invariant.group.p0i8(
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// CHECK-CTORS-LABEL: {{^}}}
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struct DynamicFrom2Virtuals;
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// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN20DynamicFrom2VirtualsC1Ev
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// CHECK-CTORS: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-CTORS-LABEL: {{^}}}
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// CHECK-NEW-LABEL: define void @_Z9Pointers1v()
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// CHECK-NEW-NOT: @llvm.launder.invariant.group.p0i8(
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// CHECK-NEW-LABEL: call void @_ZN12DynamicBase1C1Ev(
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// CHECK-NEW: %[[THIS3:.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* %[[THIS2:.*]])
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// CHECK-NEW: %[[THIS4:.*]] = bitcast i8* %[[THIS3]] to %[[DynamicDerived:.*]]*
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// CHECK-NEW: call void @_ZN14DynamicDerivedC1Ev(%[[DynamicDerived:.*]]* %[[THIS4]])
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// CHECK-NEW-LABEL: {{^}}}
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void Pointers1() {
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DynamicBase1 *DB = new DynamicBase1;
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DB->foo();
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DynamicDerived *DD = new (DB) DynamicDerived;
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DD->foo();
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DD->~DynamicDerived();
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}
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// CHECK-NEW-LABEL: define void @_Z14HackingObjectsv()
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// CHECK-NEW: call void @_ZN12DynamicBase1C1Ev
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-NEW: call void @_ZN14DynamicDerivedC1Ev(
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-NEW: call void @_ZN12DynamicBase1C1Ev(
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// CHECK-NEW-LABEL: {{^}}}
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void HackingObjects() {
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DynamicBase1 DB;
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DB.foo();
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DynamicDerived *DB2 = new (&DB) DynamicDerived;
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// Using DB now is prohibited.
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DB2->foo();
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DB2->~DynamicDerived();
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// We have to get back to the previous type to avoid calling wrong destructor
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new (&DB) DynamicBase1;
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DB.foo();
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}
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/*** Testing Constructors ***/
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struct DynamicBase1;
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// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN12DynamicBase1C2Ev(
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// CHECK-CTORS-NOT: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-CTORS-LABEL: {{^}}}
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struct DynamicDerived;
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// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN14DynamicDerivedC2Ev(
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// CHECK-CTORS: %[[THIS0:.*]] = load %[[DynamicDerived:.*]]*, %[[DynamicDerived]]** {{.*}}
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// CHECK-CTORS: %[[THIS1:.*]] = bitcast %[[DynamicDerived:.*]]* %[[THIS0]] to i8*
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// CHECK-CTORS: %[[THIS2:.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* %[[THIS1:.*]])
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// CHECK-CTORS: %[[THIS3:.*]] = bitcast i8* %[[THIS2]] to %[[DynamicDerived]]*
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// CHECK-CTORS: %[[THIS4:.*]] = bitcast %[[DynamicDerived]]* %[[THIS3]] to %[[DynamicBase:.*]]*
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// CHECK-CTORS: call void @_ZN12DynamicBase1C2Ev(%[[DynamicBase]]* %[[THIS4]])
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// CHECK-CTORS: %[[THIS5:.*]] = bitcast %struct.DynamicDerived* %[[THIS0]] to i32 (...)***
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// CHECK-CTORS: store {{.*}} %[[THIS5]]
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// CHECK-CTORS-LABEL: {{^}}}
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struct DynamicDerivedMultiple;
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// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN22DynamicDerivedMultipleC2Ev(
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// CHECK-CTORS: %[[THIS0:.*]] = load %[[CLASS:.*]]*, %[[CLASS]]** {{.*}}
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// CHECK-CTORS: %[[THIS1:.*]] = bitcast %[[CLASS:.*]]* %[[THIS0]] to i8*
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// CHECK-CTORS: %[[THIS2:.*]] = call i8* @llvm.launder.invariant.group.p0i8(i8* %[[THIS1]])
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// CHECK-CTORS: %[[THIS3:.*]] = bitcast i8* %[[THIS2]] to %[[CLASS]]*
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// CHECK-CTORS: %[[THIS4:.*]] = bitcast %[[CLASS]]* %[[THIS3]] to %[[BASE_CLASS:.*]]*
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// CHECK-CTORS: call void @_ZN12DynamicBase1C2Ev(%[[BASE_CLASS]]* %[[THIS4]])
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// CHECK-CTORS: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-CTORS: call void @_ZN12DynamicBase2C2Ev(
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// CHECK-CTORS-NOT: @llvm.launder.invariant.group.p0i8
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// CHECK-CTORS: %[[THIS10:.*]] = bitcast %struct.DynamicDerivedMultiple* %[[THIS0]] to i32 (...)***
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// CHECK-CTORS: store {{.*}} @_ZTV22DynamicDerivedMultiple, i32 0, inrange i32 0, i32 2) {{.*}} %[[THIS10]]
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// CHECK-CTORS: %[[THIS11:.*]] = bitcast %struct.DynamicDerivedMultiple* %[[THIS0]] to i8*
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// CHECK-CTORS: %[[THIS_ADD:.*]] = getelementptr inbounds i8, i8* %[[THIS11]], i64 16
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// CHECK-CTORS: %[[THIS12:.*]] = bitcast i8* %[[THIS_ADD]] to i32 (...)***
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// CHECK-CTORS: store {{.*}} @_ZTV22DynamicDerivedMultiple, i32 0, inrange i32 1, i32 2) {{.*}} %[[THIS12]]
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// CHECK-CTORS-LABEL: {{^}}}
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struct DynamicFromStatic;
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// CHECK-CTORS-LABEL: define linkonce_odr void @_ZN17DynamicFromStaticC2Ev(
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// CHECK-CTORS-NOT: @llvm.launder.invariant.group.p0i8(
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// CHECK-CTORS-LABEL: {{^}}}
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struct A {
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virtual void foo();
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int m;
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};
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struct B : A {
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void foo() override;
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};
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union U {
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A a;
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B b;
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};
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void changeToB(U *u);
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void changeToA(U *u);
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void g2(A *a) {
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a->foo();
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}
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// We have to guard access to union fields with invariant.group, because
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// it is very easy to skip the barrier with unions. In this example the inlined
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// g2 will produce loads with the same !invariant.group metadata, and
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// u->a and u->b would use the same pointer.
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// CHECK-NEW-LABEL: define void @_Z14UnionsBarriersP1U
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void UnionsBarriers(U *u) {
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// CHECK-NEW: call void @_Z9changeToBP1U(
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changeToB(u);
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: call void @_Z2g2P1A(%struct.A*
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g2(&u->b);
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// CHECK-NEW: call void @_Z9changeToAP1U(%union.U*
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changeToA(u);
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// call void @_Z2g2P1A(%struct.A* %a)
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g2(&u->a);
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// CHECK-NEW-NOT: call i8* @llvm.launder.invariant.group.p0i8(i8*
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}
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struct HoldingVirtuals {
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A a;
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};
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struct Empty {};
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struct AnotherEmpty {
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Empty e;
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};
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union NoVptrs {
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int a;
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AnotherEmpty empty;
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};
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void take(AnotherEmpty &);
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// CHECK-NEW-LABEL: noBarriers
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void noBarriers(NoVptrs &noVptrs) {
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// CHECK-NEW-NOT: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: 42
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noVptrs.a += 42;
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// CHECK-NEW-NOT: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: call void @_Z4takeR12AnotherEmpty(
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take(noVptrs.empty);
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}
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union U2 {
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HoldingVirtuals h;
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int z;
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};
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void take(HoldingVirtuals &);
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// CHECK-NEW-LABEL: define void @_Z15UnionsBarriers2R2U2
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void UnionsBarriers2(U2 &u) {
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// CHECK-NEW-NOT: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: 42
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u.z += 42;
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: call void @_Z4takeR15HoldingVirtuals(
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take(u.h);
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}
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struct VirtualInBase : HoldingVirtuals, Empty {
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};
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struct VirtualInVBase : virtual Empty, virtual HoldingVirtuals {
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};
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// It has vtable by virtual inheritance.
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struct VirtualInheritance : virtual Empty {
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};
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union U3 {
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VirtualInBase v1;
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VirtualInBase v2;
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VirtualInheritance v3;
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int z;
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};
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void take(VirtualInBase &);
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void take(VirtualInVBase &);
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void take(VirtualInheritance &);
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void UnionsBarrier3(U3 &u) {
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// CHECK-NEW-NOT: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: 42
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u.z += 42;
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: call void @_Z4takeR13VirtualInBase(
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take(u.v1);
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: call void @_Z4takeR13VirtualInBase(
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take(u.v2);
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
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// CHECK-NEW: call void @_Z4takeR18VirtualInheritance(
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take(u.v3);
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}
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// CHECK-NEW-LABEL: define void @_Z7comparev()
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void compare() {
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A *a = new A;
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a->foo();
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// CHECK-NEW: call i8* @llvm.launder.invariant.group.p0i8(i8*
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A *b = new (a) B;
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// CHECK-NEW: %[[a:.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8*
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// CHECK-NEW: %[[a2:.*]] = bitcast i8* %[[a]] to %struct.A*
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// CHECK-NEW: %[[b:.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8*
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// CHECK-NEW: %[[b2:.*]] = bitcast i8* %[[b]] to %struct.A*
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// CHECK-NEW: %cmp = icmp eq %struct.A* %[[a2]], %[[b2]]
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if (a == b)
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b->foo();
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}
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// CHECK-NEW-LABEL: compare2
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bool compare2(A *a, A *a2) {
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// CHECK-NEW: %[[a:.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8*
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// CHECK-NEW: %[[a2:.*]] = bitcast i8* %[[a]] to %struct.A*
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// CHECK-NEW: %[[b:.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8*
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// CHECK-NEW: %[[b2:.*]] = bitcast i8* %[[b]] to %struct.A*
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// CHECK-NEW: %cmp = icmp ult %struct.A* %[[a2]], %[[b2]]
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return a < a2;
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}
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// CHECK-NEW-LABEL: compareIntPointers
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bool compareIntPointers(int *a, int *b) {
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// CHECK-NEW-NOT: call i8* @llvm.strip.invariant.group
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return a == b;
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}
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struct HoldingOtherVirtuals {
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B b;
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};
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// There is no need to add barriers for comparision of pointer to classes
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// that are not dynamic.
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// CHECK-NEW-LABEL: compare5
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bool compare5(HoldingOtherVirtuals *a, HoldingOtherVirtuals *b) {
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// CHECK-NEW-NOT: call i8* @llvm.strip.invariant.group
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return a == b;
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}
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// CHECK-NEW-LABEL: compareNull
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bool compareNull(A *a) {
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// CHECK-NEW-NOT: call i8* @llvm.strip.invariant.group
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if (a != nullptr)
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return false;
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if (!a)
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return false;
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return a == nullptr;
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}
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struct X;
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// We have to also introduce the barriers if comparing pointers to incomplete
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// objects
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// CHECK-NEW-LABEL: define zeroext i1 @_Z8compare4P1XS0_
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bool compare4(X *x, X *x2) {
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// CHECK-NEW: %[[x:.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8*
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// CHECK-NEW: %[[xp:.*]] = bitcast i8* %[[x]] to %struct.X*
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// CHECK-NEW: %[[x2:.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8*
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// CHECK-NEW: %[[x2p:.*]] = bitcast i8* %[[x2]] to %struct.X*
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// CHECK-NEW: %cmp = icmp eq %struct.X* %[[xp]], %[[x2p]]
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return x == x2;
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}
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// CHECK-NEW-LABEL: define void @_Z7member1P20HoldingOtherVirtuals(
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void member1(HoldingOtherVirtuals *p) {
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// CHECK-NEW-NOT: call i8* @llvm.strip.invariant.group.p0i8(
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(void)p->b;
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}
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// CHECK-NEW-LABEL: member2
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void member2(A *a) {
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// CHECK-NEW: call i8* @llvm.strip.invariant.group.p0i8
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(void)a->m;
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}
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// Check if from comparison of addresses of member we can't infer the equality
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// of ap and bp.
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// CHECK-NEW-LABEL: @_Z18testCompareMembersv(
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void testCompareMembers() {
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// CHECK-NEW: [[AP:%.*]] = alloca %struct.A*
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// CHECK-NEW: [[APM:%.*]] = alloca i32*
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// CHECK-NEW: [[BP:%.*]] = alloca %struct.B*
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// CHECK-NEW: [[BPM:%.*]] = alloca i32*
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A *ap = new A;
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// CHECK-NEW: call void %{{.*}}(%struct.A* %{{.*}})
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ap->foo();
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// CHECK-NEW: [[TMP7:%.*]] = load %struct.A*, %struct.A** [[AP]]
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// CHECK-NEW: [[TMP8:%.*]] = bitcast %struct.A* [[TMP7]] to i8*
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// CHECK-NEW: [[TMP9:%.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* [[TMP8]])
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// CHECK-NEW: [[TMP10:%.*]] = bitcast i8* [[TMP9]] to %struct.A*
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// CHECK-NEW: [[M:%.*]] = getelementptr inbounds [[STRUCT_A:%.*]], %struct.A* [[TMP10]], i32 0, i32 1
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// CHECK-NEW: store i32* [[M]], i32** [[APM]]
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int *const apm = &ap->m;
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B *bp = new (ap) B;
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// CHECK-NEW: [[TMP20:%.*]] = load %struct.B*, %struct.B** [[BP]]
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// CHECK-NEW: [[TMP21:%.*]] = bitcast %struct.B* [[TMP20]] to %struct.A*
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// CHECK-NEW: [[TMP22:%.*]] = bitcast %struct.A* [[TMP21]] to i8*
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// CHECK-NEW: [[TMP23:%.*]] = call i8* @llvm.strip.invariant.group.p0i8(i8* [[TMP22]])
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// CHECK-NEW: [[TMP24:%.*]] = bitcast i8* [[TMP23]] to %struct.A*
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// CHECK-NEW: [[M4:%.*]] = getelementptr inbounds [[STRUCT_A]], %struct.A* [[TMP24]], i32 0, i32 1
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// CHECK-NEW: store i32* [[M4]], i32** [[BPM]]
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int *const bpm = &bp->m;
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// CHECK-NEW: [[TMP25:%.*]] = load i32*, i32** [[APM]]
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// CHECK-NEW: [[TMP26:%.*]] = load i32*, i32** [[BPM]]
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// CHECK-NEW-NOT: strip.invariant.group
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// CHECK-NEW-NOT: launder.invariant.group
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// CHECK-NEW: [[CMP:%.*]] = icmp eq i32* [[TMP25]], [[TMP26]]
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if (apm == bpm) {
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bp->foo();
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}
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}
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// CHECK-NEW-LABEL: define void @_Z9testCast1P1A(%struct.A*
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void testCast1(A *a) {
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// Here we get rid of dynamic info
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// CHECK-NEW: call i8* @llvm.strip.invariant.group
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auto *v = (void *)a;
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// CHECK-NEW: call i8* @llvm.strip.invariant.group
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auto i2 = (uintptr_t)a;
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(void)i2;
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// CHECK-NEW-NOT: @llvm.strip.invariant.group
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// CHECK-NEW-NOT: @llvm.launder.invariant.group
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// The information is already stripped
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auto i = (uintptr_t)v;
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}
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struct Incomplete;
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// CHECK-NEW-LABEL: define void @_Z9testCast2P10Incomplete(%struct.Incomplete*
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void testCast2(Incomplete *I) {
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// Here we get rid of potential dynamic info
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// CHECK-NEW: call i8* @llvm.strip.invariant.group
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auto *v = (void *)I;
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// CHECK-NEW: call i8* @llvm.strip.invariant.group
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auto i2 = (uintptr_t)I;
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(void)i2;
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// CHECK-NEW-NOT: @llvm.strip.invariant.group
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// CHECK-NEW-NOT: @llvm.launder.invariant.group
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// The information is already stripped
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auto i = (uintptr_t)v;
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}
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// CHECK-NEW-LABEL: define void @_Z9testCast3y(
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void testCast3(uintptr_t i) {
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// CHECK-NEW-NOT: @llvm.strip.invariant.group
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// CHECK-NEW: @llvm.launder.invariant.group
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A *a3 = (A *)i;
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(void)a3;
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auto *v2 = (void *)i;
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// CHECK-NEW: @llvm.launder.invariant.group
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A *a2 = (A *)v2;
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(void)a2;
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// CHECK-NEW-NOT: @llvm.launder.invariant.group
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auto *v3 = (void *)i;
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(void)v3;
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}
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// CHECK-NEW-LABEL: define void @_Z9testCast4y(
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void testCast4(uintptr_t i) {
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// CHECK-NEW-NOT: @llvm.strip.invariant.group
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// CHECK-NEW: @llvm.launder.invariant.group
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auto *a3 = (Incomplete *)i;
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(void)a3;
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// CHECK-NEW: @llvm.launder.invariant.group
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auto *v2 = (void *)i;
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// CHECK-NEW-NOT: @llvm.launder.invariant.group
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auto *a2 = (Incomplete *)v2;
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(void)a2;
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}
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// CHECK-NEW-LABEL: define void @_Z9testCast5P1B(
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void testCast5(B *b) {
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// CHECK-NEW-NOT: @llvm.strip.invariant.group
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// CHECK-NEW-NOT: @llvm.launder.invariant.group
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A *a = b;
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(void)a;
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auto *b2 = (B *)a;
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(void)b2;
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}
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// CHECK-NEW-LABEL: define void @_Z9testCast6P1A(
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void testCast6(A *a) {
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// CHECK-NEW: @llvm.strip.invariant.group
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auto *I = (Incomplete *)a;
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(void)I;
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// CHECK-NEW: @llvm.launder.invariant.group
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auto *a2 = (A *)I;
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(void)a2;
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// CHECK-NEW: @llvm.strip.invariant.group
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auto *E = (Empty *)a;
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(void)E;
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// CHECK-NEW: @llvm.launder.invariant.group
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auto *a3 = (A *)E;
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(void)a3;
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// CHECK-NEW-NOT: @llvm.strip.invariant.group
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auto i = (uintptr_t)E;
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(void)i;
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}
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class Incomplete2;
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// CHECK-NEW-LABEL: define void @_Z9testCast7P10Incomplete(
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void testCast7(Incomplete *I) {
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// CHECK-NEW-NOT: @llvm.strip.invariant.group
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// Incomplete2 could be dynamic where Incomplete may not be dynamic, thus
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// launder is needed. We don't strip firstly because launder is sufficient.
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// CHECK-NEW: @llvm.launder.invariant.group
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auto *I2 = (Incomplete2 *)I;
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(void)I2;
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// CHECK-NEW-LABEL: ret void
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}
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template <typename Base>
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struct PossiblyDerivingFromDynamicBase : Base {
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};
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// CHECK-NEW-LABEL: define void @_Z9testCast8P10Incomplete(
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void testCast8(Incomplete *I) {
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// CHECK-NEW-NOT: @llvm.strip.invariant.group
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// CHECK-NEW: @llvm.launder.invariant.group
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auto *P = (PossiblyDerivingFromDynamicBase<Incomplete> *)I;
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(void)P;
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// CHECK-NEW: @llvm.launder.invariant.group
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auto *P2 = (PossiblyDerivingFromDynamicBase<Empty> *)I;
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(void)P2;
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// CHECK-NEW: @llvm.launder.invariant.group
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auto *P3 = (PossiblyDerivingFromDynamicBase<A> *)I;
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(void)P3;
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// CHECK-NEW-NOT: @llvm.launder.invariant.group
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auto *a3 = (A *)P3;
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// CHECK-NEW-LABEL: ret void
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}
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// CHECK-NEW-LABEL: define void @_Z9testCast9
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void testCast9(PossiblyDerivingFromDynamicBase<Incomplete> *P) {
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// CHECK-NEW: @llvm.strip.invariant.group
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auto *V = (void *)P;
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// CHECK-NEW-LABEL: ret void
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}
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/** DTORS **/
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// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN10StaticBaseD2Ev(
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// CHECK-DTORS-NOT: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-DTORS-LABEL: {{^}}}
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// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN25DynamicFromVirtualStatic2D2Ev(
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// CHECK-DTORS-NOT: invariant.barrier
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// CHECK-DTORS-LABEL: {{^}}}
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// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN17DynamicFromStaticD2Ev
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// CHECK-DTORS-NOT: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-DTORS-LABEL: {{^}}}
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// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN22DynamicDerivedMultipleD2Ev(
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// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN12DynamicBase2D2Ev(
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// CHECK-DTORS: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-DTORS-LABEL: {{^}}}
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// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN12DynamicBase1D2Ev
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// CHECK-DTORS: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-DTORS-LABEL: {{^}}}
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// CHECK-DTORS-LABEL: define linkonce_odr void @_ZN14DynamicDerivedD2Ev
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// CHECK-DTORS-NOT: call i8* @llvm.launder.invariant.group.p0i8(
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// CHECK-DTORS-LABEL: {{^}}}
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// CHECK-LINK-REQ: !llvm.module.flags = !{![[FIRST:[0-9]+]], ![[SEC:[0-9]+]]{{.*}}}
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// CHECK-LINK-REQ: ![[FIRST]] = !{i32 1, !"StrictVTablePointers", i32 1}
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// CHECK-LINK-REQ: ![[SEC]] = !{i32 3, !"StrictVTablePointersRequirement", ![[META:.*]]}
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// CHECK-LINK-REQ: ![[META]] = !{!"StrictVTablePointers", i32 1}
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