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[Clang][DebugInfo] Suppress VTable debug info if no definition of the VTable is emitted on the COFF platform
1 parent 839b17c commit 1e6b660

8 files changed

+79
-17
lines changed

‎clang/lib/CodeGen/CGDebugInfo.cpp‎

Lines changed: 11 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2662,6 +2662,17 @@ void CGDebugInfo::emitVTableSymbol(llvm::GlobalVariable *VTable,
26622662
if (DebugKind <= llvm::codegenoptions::DebugLineTablesOnly)
26632663
return;
26642664

2665+
// On COFF platform, we shouldn't emit a reference to an external entity (i.e.
2666+
// VTable) into debug info, which is constructed within a discardable section.
2667+
// If that entity ends up implicitly dllimported from another DLL, the linker
2668+
// may produce a runtime pseudo-relocation for it (BFD-ld only. LLD prohibits
2669+
// to emit such relocation). If the debug section is stripped, the runtime
2670+
// pseudo-relocation points to memory space outside of the module, causing an
2671+
// access violation.
2672+
if (CGM.getTarget().getTriple().isOSBinFormatCOFF() &&
2673+
VTable->isDeclarationForLinker())
2674+
return;
2675+
26652676
ASTContext &Context = CGM.getContext();
26662677
StringRef SymbolName = "_vtable$";
26672678
SourceLocation Loc;

‎clang/test/DebugInfo/CXX/vtable-external.cpp‎

Lines changed: 12 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -18,7 +18,7 @@
1818
// * Its '_vtable$' is NOT generated
1919
// # when optimized even if no LLVM passes:
2020
// * The vtable is declared as `available_externally` (which is potentially turned into `external` by LLVM passes)
21-
// * Its '_vtable$' is generated
21+
// * Its '_vtable$' is generated only if the compiler is targeting the non-COFF platforms
2222

2323
struct CInlined {
2424
virtual void f1() noexcept {}
@@ -64,14 +64,20 @@ int main() {
6464
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes -DNO_DTOR_BODY %s -o - | FileCheck %s -check-prefixes CHECK-NO-DTOR,CHECK-NO-DTOR-O0
6565
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes -DNO_DTOR_BODY %s -o - | FileCheck %s -check-prefixes CHECK-NO-DTOR,CHECK-NO-DTOR-O1
6666

67+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s -check-prefixes CHECK-HAS-DTOR,CHECK-HAS-DTOR-O0
68+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s -check-prefixes CHECK-HAS-DTOR,CHECK-HAS-DTOR-O1-NODBG
69+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes -DNO_DTOR_BODY %s -o - | FileCheck %s -check-prefixes CHECK-NO-DTOR,CHECK-NO-DTOR-O0
70+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes -DNO_DTOR_BODY %s -o - | FileCheck %s -check-prefixes CHECK-NO-DTOR,CHECK-NO-DTOR-O1-NODBG
71+
6772
// CHECK-HAS-DTOR: $_ZTV8CInlined = comdat any
6873
// CHECK-HAS-DTOR-NOT: $_ZTV9CNoInline
6974
// CHECK-HAS-DTOR-NOT: $_ZTV8CNoFnDef
7075

7176
// CHECK-HAS-DTOR-DAG: @_ZTV8CInlined = linkonce_odr {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, comdat, align 8, !dbg [[INLINED_VTABLE_VAR:![0-9]+]]
7277
// CHECK-HAS-DTOR-DAG: @_ZTV9CNoInline = {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8, !dbg [[NOINLINE_VTABLE_VAR:![0-9]+]]
73-
// CHECK-HAS-DTOR-O0-DAG: @_ZTV8CNoFnDef = external {{.*}}constant {{{ \[[^]]*\] }}}, align 8{{$}}
74-
// CHECK-HAS-DTOR-O1-DAG: @_ZTV8CNoFnDef = available_externally {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8, !dbg [[NOFNDEF_VTABLE_VAR:![0-9]+]]
78+
// CHECK-HAS-DTOR-O0-DAG: @_ZTV8CNoFnDef = external {{.*}}constant {{{ \[[^]]*\] }}}, align 8{{$}}
79+
// CHECK-HAS-DTOR-O1-DAG: @_ZTV8CNoFnDef = available_externally {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8, !dbg [[NOFNDEF_VTABLE_VAR:![0-9]+]]
80+
// CHECK-HAS-DTOR-O1-NODBG-DAG: @_ZTV8CNoFnDef = available_externally {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8{{$}}
7581

7682
// CHECK-HAS-DTOR: !llvm.dbg.cu
7783

@@ -94,8 +100,9 @@ int main() {
94100

95101
// CHECK-NO-DTOR-DAG: @_ZTV8CInlined = external {{.*}}constant {{.*}}, align 8{{$}}
96102
// CHECK-NO-DTOR-DAG: @_ZTV9CNoInline = {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8, !dbg [[NOINLINE_VTABLE_VAR:![0-9]+]]
97-
// CHECK-NO-DTOR-O0-DAG: @_ZTV8CNoFnDef = external {{.*}}constant {{{ \[[^]]*\] }}}, align 8{{$}}
98-
// CHECK-NO-DTOR-O1-DAG: @_ZTV8CNoFnDef = available_externally {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8, !dbg [[NOFNDEF_VTABLE_VAR:![0-9]+]]
103+
// CHECK-NO-DTOR-O0-DAG: @_ZTV8CNoFnDef = external {{.*}}constant {{{ \[[^]]*\] }}}, align 8{{$}}
104+
// CHECK-NO-DTOR-O1-DAG: @_ZTV8CNoFnDef = available_externally {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8, !dbg [[NOFNDEF_VTABLE_VAR:![0-9]+]]
105+
// CHECK-NO-DTOR-O1-NODBG-DAG: @_ZTV8CNoFnDef = available_externally {{.*}}constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8{{$}}
99106

100107
// CHECK-NO-DTOR: !llvm.dbg.cu
101108

‎clang/test/DebugInfo/CXX/vtable-inheritance-diamond.cpp‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -44,6 +44,8 @@ int main() {
4444

4545
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s
4646
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s
47+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s
48+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s
4749

4850
// CHECK: $_ZTVN3NSP5CBaseE = comdat any
4951
// CHECK: $_ZTVN5NSP_15CLeftE = comdat any

‎clang/test/DebugInfo/CXX/vtable-inheritance-multiple.cpp‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -38,6 +38,8 @@ int main() {
3838

3939
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s
4040
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s
41+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s
42+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s
4143

4244
// CHECK: $_ZTVN5NSP_18CBaseOneE = comdat any
4345
// CHECK: $_ZTVN5NSP_28CBaseTwoE = comdat any

‎clang/test/DebugInfo/CXX/vtable-inheritance-simple-main.cpp‎

Lines changed: 24 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -108,6 +108,30 @@ int main() {
108108
// RUN: llvm-link %t.simple-base.bc %t.simple-derived.bc %t.simple-main.bc -S -o %t.simple-combined.ll
109109
// RUN: FileCheck --input-file=%t.simple-combined.ll -check-prefix=CHECK-TWO %s
110110

111+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 %s -o %t.simple-base.bc -DBASE_CODE
112+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 %s -o %t.simple-derived.bc -DDERIVED_CODE
113+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 %s -o %t.simple-main.bc -DMAIN_CODE
114+
// RUN: llvm-link %t.simple-base.bc %t.simple-derived.bc %t.simple-main.bc -S -o %t.simple-combined.ll
115+
// RUN: FileCheck --input-file=%t.simple-combined.ll -check-prefix=CHECK-ONE %s
116+
117+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 -flto %s -o %t.simple-base.bc -DBASE_CODE
118+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 -flto %s -o %t.simple-derived.bc -DDERIVED_CODE
119+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 -flto %s -o %t.simple-main.bc -DMAIN_CODE
120+
// RUN: llvm-link %t.simple-base.bc %t.simple-derived.bc %t.simple-main.bc -S -o %t.simple-combined.ll
121+
// RUN: FileCheck --input-file=%t.simple-combined.ll -check-prefix=CHECK-ONE %s
122+
123+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 %s -o %t.simple-base.bc -DBASE_CODE -DSYMBOL_AT_FILE_SCOPE
124+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 %s -o %t.simple-derived.bc -DDERIVED_CODE -DSYMBOL_AT_FILE_SCOPE
125+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 %s -o %t.simple-main.bc -DMAIN_CODE -DSYMBOL_AT_FILE_SCOPE
126+
// RUN: llvm-link %t.simple-base.bc %t.simple-derived.bc %t.simple-main.bc -S -o %t.simple-combined.ll
127+
// RUN: FileCheck --input-file=%t.simple-combined.ll -check-prefix=CHECK-TWO %s
128+
129+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 -flto %s -o %t.simple-base.bc -DBASE_CODE -DSYMBOL_AT_FILE_SCOPE
130+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 -flto %s -o %t.simple-derived.bc -DDERIVED_CODE -DSYMBOL_AT_FILE_SCOPE
131+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm-bc -debug-info-kind=limited -dwarf-version=5 -O0 -flto %s -o %t.simple-main.bc -DMAIN_CODE -DSYMBOL_AT_FILE_SCOPE
132+
// RUN: llvm-link %t.simple-base.bc %t.simple-derived.bc %t.simple-main.bc -S -o %t.simple-combined.ll
133+
// RUN: FileCheck --input-file=%t.simple-combined.ll -check-prefix=CHECK-TWO %s
134+
111135
// CHECK-ONE: ${{_ZN3NSP5CBaseC2Ev|_ZN8CDerivedC2Ev}} = comdat any
112136
// CHECK-ONE: ${{_ZN3NSP5CBaseC2Ev|_ZN8CDerivedC2Ev}} = comdat any
113137

‎clang/test/DebugInfo/CXX/vtable-inheritance-simple.cpp‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -30,7 +30,8 @@ int main() {
3030

3131
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s
3232
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s
33-
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s --check-prefix=COFF
33+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s
34+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s
3435

3536
// CHECK: $_ZTVN3NSP5CBaseE = comdat any
3637
// CHECK: $_ZTV8CDerived = comdat any

‎clang/test/DebugInfo/CXX/vtable-inheritance-virtual.cpp‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -44,6 +44,8 @@ int main() {
4444

4545
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s
4646
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s
47+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s
48+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s
4749

4850
// CHECK: $_ZTVN3NSP5CBaseE = comdat any
4951
// CHECK: $_ZTVN5NSP_15CLeftE = comdat any

‎clang/test/DebugInfo/CXX/vtable-template-instantiation.cpp‎

Lines changed: 24 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -12,7 +12,7 @@
1212
// * Its '_vtable$' is NOT generated
1313
// # when optimized even if no LLVM passes
1414
// * The vtable is declared as `available_externally` (which is potentially turned into `external` by LLVM passes)
15-
// * Its '_vtable$' is generated
15+
// * Its '_vtable$' is generated only if the compiler is targeting the non-COFF platforms
1616

1717
struct CBase {
1818
virtual void f() noexcept {}
@@ -54,8 +54,17 @@ int main() {
5454
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - -DNOCAST | FileCheck %s -check-prefixes IMPLICIT
5555
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - -DEXPLICIT | FileCheck %s -check-prefixes EXPLICIT
5656
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - -DEXPLICIT | FileCheck %s -check-prefixes EXPLICIT
57-
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - -DEXTERN | FileCheck %s -check-prefixes EXTERN,EXTERN-O0
58-
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - -DEXTERN | FileCheck %s -check-prefixes EXTERN,EXTERN-O1
57+
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - -DEXTERN | FileCheck %s -check-prefixes EXTERN,EXTERN-O0,EXTERN-NODBG
58+
// RUN: %clang_cc1 -triple x86_64-linux -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - -DEXTERN | FileCheck %s -check-prefixes EXTERN,EXTERN-O1,EXTERN-DBG
59+
60+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - | FileCheck %s -check-prefixes IMPLICIT
61+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - | FileCheck %s -check-prefixes IMPLICIT
62+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - -DNOCAST | FileCheck %s -check-prefixes IMPLICIT
63+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - -DNOCAST | FileCheck %s -check-prefixes IMPLICIT
64+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - -DEXPLICIT | FileCheck %s -check-prefixes EXPLICIT
65+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - -DEXPLICIT | FileCheck %s -check-prefixes EXPLICIT
66+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O0 -disable-llvm-passes %s -o - -DEXTERN | FileCheck %s -check-prefixes EXTERN,EXTERN-O0,EXTERN-NODBG
67+
// RUN: %clang_cc1 -triple x86_64-mingw -emit-llvm -debug-info-kind=limited -dwarf-version=5 -O1 -disable-llvm-passes %s -o - -DEXTERN | FileCheck %s -check-prefixes EXTERN,EXTERN-O1-NODBG,EXTERN-NODBG
5968

6069
// IMPLICIT: $_ZTV9CTemplateIvE = comdat any
6170
// IMPLICIT: @_ZTV9CTemplateIvE = linkonce_odr {{.*}}unnamed_addr constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, comdat, align 8, !dbg [[VTABLE_VAR:![0-9]*]]
@@ -74,11 +83,15 @@ int main() {
7483
// EXPLICIT-DAG: [[PVOID]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
7584

7685
// EXTERN-NOT: $_ZTV9CTemplateIvE
77-
// EXTERN-O0: @_ZTV9CTemplateIvE = external {{.*}}unnamed_addr constant {{{ \[[^]]*\] }}}, align 8{{$}}
78-
// EXTERN-O1: @_ZTV9CTemplateIvE = available_externally {{.*}}unnamed_addr constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8, !dbg [[VTABLE_VAR:![0-9]*]]
79-
// EXTERN-O0-NOT: linkageName: "_ZTV9CTemplateIvE"
80-
// EXTERN-O1-DAG: [[VTABLE:![0-9]+]] = distinct !DIGlobalVariable(name: "_vtable$", linkageName: "_ZTV9CTemplateIvE"
81-
// EXTERN-O1-DAG: [[VTABLE_VAR]] = !DIGlobalVariableExpression(var: [[VTABLE]], expr: !DIExpression())
82-
// EXTERN-O1-DAG: [[TYPE:![0-9]+]] = !DICompositeType(tag: DW_TAG_structure_type, name: "CTemplate<void>"
83-
// EXTERN-O1-DAG: !DIDerivedType(tag: DW_TAG_variable, name: "_vtable$", scope: [[TYPE]], file: {{.*}}, baseType: [[PVOID:![0-9]+]], flags: DIFlagPrivate | DIFlagArtificial | DIFlagStaticMember)
84-
// EXTERN-O1-DAG: [[PVOID]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
86+
// EXTERN-O0: @_ZTV9CTemplateIvE = external {{.*}}unnamed_addr constant {{{ \[[^]]*\] }}}, align 8{{$}}
87+
// EXTERN-O1: @_ZTV9CTemplateIvE = available_externally {{.*}}unnamed_addr constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8, !dbg [[VTABLE_VAR:![0-9]*]]
88+
// EXTERN-O1-NODBG: @_ZTV9CTemplateIvE = available_externally {{.*}}unnamed_addr constant {{{ \[[^]]*\] } { \[[^]]*\] \[[^]]*\] }}}, align 8{{$}}
89+
// EXTERN-NODBG-DAG: [[TYPE:![0-9]+]] = !DICompositeType(tag: DW_TAG_structure_type, name: "CTemplate<void>"
90+
// EXTERN-NODBG-DAG: !DICompileUnit
91+
// EXTERN-NODBG-NOT: !DIGlobalVariable(name: "_vtable$", linkageName: "_ZTV9CTemplateIvE"
92+
// EXTERN-NODBG-NOT: !DIDerivedType(tag: DW_TAG_variable, name: "_vtable$", scope: [[TYPE]], file: {{.*}}, baseType: [[PVOID:![0-9]+]], flags: DIFlagPrivate | DIFlagArtificial | DIFlagStaticMember)
93+
// EXTERN-DBG-DAG: [[VTABLE:![0-9]+]] = distinct !DIGlobalVariable(name: "_vtable$", linkageName: "_ZTV9CTemplateIvE"
94+
// EXTERN-DBG-DAG: [[VTABLE_VAR]] = !DIGlobalVariableExpression(var: [[VTABLE]], expr: !DIExpression())
95+
// EXTERN-DBG-DAG: [[TYPE:![0-9]+]] = !DICompositeType(tag: DW_TAG_structure_type, name: "CTemplate<void>"
96+
// EXTERN-DBG-DAG: !DIDerivedType(tag: DW_TAG_variable, name: "_vtable$", scope: [[TYPE]], file: {{.*}}, baseType: [[PVOID:![0-9]+]], flags: DIFlagPrivate | DIFlagArtificial | DIFlagStaticMember)
97+
// EXTERN-DBG-DAG: [[PVOID]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)

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