r266556 - DebugInfo: Make DICompositeTypes distinct most of the time
Duncan P. N. Exon Smith via cfe-commits
cfe-commits at lists.llvm.org
Sun Apr 17 00:45:10 PDT 2016
Author: dexonsmith
Date: Sun Apr 17 02:45:08 2016
New Revision: 266556
URL: http://llvm.org/viewvc/llvm-project?rev=266556&view=rev
Log:
DebugInfo: Make DICompositeTypes distinct most of the time
Since elements of most kinds of DICompositeType have back references,
most are involved in uniquing cycles. Except via the ODR 'identifier:'
field, which doesn't care about the storage type (see r266549),
they have no hope of being uniqued.
Distinct nodes are far more efficient, so use them for most kinds of
DICompositeType definitions (i.e., when DIType::isForwardDecl is false).
The exceptions:
- DW_TAG_array_type, since their elements never have back-references
and they never have ODR 'identifier:' fields;
- DW_TAG_enumeration_type when there is no ODR 'identifier:' field,
since their elements usually don't have back-references.
This breaks the last major uniquing cycle I'm aware of in the debug info
graph. The impact won't be enormous for C++ because references to
ODR-uniqued nodes still use string-based DITypeRefs; but this should
prevent a regression in C++ when we drop the string-based references.
This wouldn't have been reasonable until r266549, when composite types
stopped relying on being uniqued by structural equivalence to prevent
blow-ups at LTO time.
Modified:
cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp
cfe/trunk/test/CodeGenCXX/debug-info-artificial-arg.cpp
cfe/trunk/test/CodeGenCXX/debug-info-class.cpp
cfe/trunk/test/CodeGenCXX/debug-info-template-limit.cpp
cfe/trunk/test/CodeGenCXX/debug-info-template-member.cpp
cfe/trunk/test/CodeGenCXX/debug-info-template-quals.cpp
cfe/trunk/test/CodeGenCXX/debug-info-template.cpp
cfe/trunk/test/CodeGenCXX/debug-lambda-expressions.cpp
cfe/trunk/test/Modules/ExtDebugInfo.cpp
cfe/trunk/test/Modules/ExtDebugInfo.m
cfe/trunk/test/Modules/ModuleDebugInfo.m
Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Sun Apr 17 02:45:08 2016
@@ -2374,6 +2374,30 @@ llvm::DICompositeType *CGDebugInfo::Crea
getTagForRecord(RD), RDName, RDContext, DefUnit, Line, 0, Size, Align, 0,
FullName);
+ // Elements of composite types usually have back to the type, creating
+ // uniquing cycles. Distinct nodes are more efficient.
+ switch (RealDecl->getTag()) {
+ default:
+ llvm_unreachable("invalid composite type tag");
+
+ case llvm::dwarf::DW_TAG_array_type:
+ case llvm::dwarf::DW_TAG_enumeration_type:
+ // Array elements and most enumeration elements don't have back references,
+ // so they don't tend to be involved in uniquing cycles and there is some
+ // chance of merging them when linking together two modules. Only make
+ // them distinct if they are ODR-uniqued.
+ if (FullName.empty())
+ break;
+
+ case llvm::dwarf::DW_TAG_structure_type:
+ case llvm::dwarf::DW_TAG_union_type:
+ case llvm::dwarf::DW_TAG_class_type:
+ // Immediatley resolve to a distinct node.
+ RealDecl =
+ llvm::MDNode::replaceWithDistinct(llvm::TempDICompositeType(RealDecl));
+ break;
+ }
+
RegionMap[Ty->getDecl()].reset(RealDecl);
TypeCache[QualType(Ty, 0).getAsOpaquePtr()].reset(RealDecl);
Modified: cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp Sun Apr 17 02:45:08 2016
@@ -56,7 +56,7 @@ void instantiate(int x) {
// CHECK: !DILocalVariable(
// CHECK-NOT: name:
// CHECK: type: ![[UNION:[0-9]+]]
-// CHECK: ![[UNION]] = !DICompositeType(tag: DW_TAG_union_type,
+// CHECK: ![[UNION]] = distinct !DICompositeType(tag: DW_TAG_union_type,
// CHECK-NOT: name:
// CHECK: elements
// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "i", scope: ![[UNION]],
Modified: cfe/trunk/test/CodeGenCXX/debug-info-artificial-arg.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-artificial-arg.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-artificial-arg.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-info-artificial-arg.cpp Sun Apr 17 02:45:08 2016
@@ -22,7 +22,7 @@ int main(int argc, char **argv) {
A reallyA (500);
}
-// CHECK: ![[CLASSTYPE:.*]] = !DICompositeType(tag: DW_TAG_class_type, name: "A",
+// CHECK: ![[CLASSTYPE:.*]] = distinct !DICompositeType(tag: DW_TAG_class_type, name: "A",
// CHECK-SAME: identifier: "_ZTS1A"
// CHECK: ![[ARTARG:.*]] = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !"_ZTS1A",
// CHECK-SAME: DIFlagArtificial
Modified: cfe/trunk/test/CodeGenCXX/debug-info-class.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-class.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-class.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-info-class.cpp Sun Apr 17 02:45:08 2016
@@ -101,7 +101,7 @@ int main(int argc, char **argv) {
// CHECK: ![[INT:[0-9]+]] = !DIBasicType(name: "int"
-// CHECK: [[C:![0-9]*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "C",
+// CHECK: [[C:![0-9]*]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "C",
// CHECK-NOT: DIFlagFwdDecl
// CHECK-SAME: elements: [[C_MEM:![0-9]*]]
// CHECK-SAME: vtableHolder: !"_ZTS1C"
Modified: cfe/trunk/test/CodeGenCXX/debug-info-template-limit.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-template-limit.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-template-limit.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-info-template-limit.cpp Sun Apr 17 02:45:08 2016
@@ -1,7 +1,7 @@
// RUN: %clang_cc1 -emit-llvm -debug-info-kind=limited -triple %itanium_abi_triple %s -o - | FileCheck %s
// Check that this pointer type is TC<int>
-// CHECK: ![[LINE:[0-9]+]] = !DICompositeType(tag: DW_TAG_class_type, name: "TC<int>"{{.*}}, identifier: "_ZTS2TCIiE")
+// CHECK: ![[LINE:[0-9]+]] = distinct !DICompositeType(tag: DW_TAG_class_type, name: "TC<int>"{{.*}}, identifier: "_ZTS2TCIiE")
// CHECK: !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !"_ZTS2TCIiE"
template<typename T>
Modified: cfe/trunk/test/CodeGenCXX/debug-info-template-member.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-template-member.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-template-member.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-info-template-member.cpp Sun Apr 17 02:45:08 2016
@@ -24,7 +24,7 @@ inline int add3(int x) {
// CHECK-SAME: type: [[FOO_FUNC_TYPE:![0-9]*]]
// CHECK: [[FOO_FUNC_TYPE]] = !DISubroutineType(types: [[FOO_FUNC_PARAMS:![0-9]*]])
// CHECK: [[FOO_FUNC_PARAMS]] = !{null, !{{[0-9]*}}, !"[[OUTER_FOO_INNER_ID:.*]]"}
-// CHECK: !{{[0-9]*}} = !DICompositeType(tag: DW_TAG_structure_type, name: "inner"{{.*}}, identifier: "[[OUTER_FOO_INNER_ID]]")
+// CHECK: !{{[0-9]*}} = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "inner"{{.*}}, identifier: "[[OUTER_FOO_INNER_ID]]")
// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "virt<elem>"
// CHECK-SAME: elements: [[VIRT_MEM:![0-9]*]]
@@ -34,7 +34,7 @@ inline int add3(int x) {
// CHECK: [[VIRT_TEMP_PARAM]] = !{[[VIRT_T:![0-9]*]]}
// CHECK: [[VIRT_T]] = !DITemplateTypeParameter(name: "T", type: !"_ZTS4elem")
-// CHECK: [[C:![0-9]*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "MyClass"
+// CHECK: [[C:![0-9]*]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "MyClass"
// CHECK-SAME: elements: [[C_MEM:![0-9]*]]
// CHECK-SAME: vtableHolder: !"_ZTS7MyClass"
// CHECK-SAME: identifier: "_ZTS7MyClass")
@@ -43,7 +43,7 @@ inline int add3(int x) {
// CHECK: [[C_FUNC]] = !DISubprogram(name: "func",{{.*}} line: 7,
-// CHECK: [[ELEM:![0-9]*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "elem"
+// CHECK: [[ELEM:![0-9]*]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "elem"
// CHECK-SAME: elements: [[ELEM_MEM:![0-9]*]]
// CHECK-SAME: identifier: "_ZTS4elem"
// CHECK: [[ELEM_MEM]] = !{[[ELEM_X:![0-9]*]]}
Modified: cfe/trunk/test/CodeGenCXX/debug-info-template-quals.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-template-quals.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-template-quals.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-info-template-quals.cpp Sun Apr 17 02:45:08 2016
@@ -15,7 +15,7 @@ void foo (const char *c) {
str.assign(c, str);
}
-// CHECK: [[BS:.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "basic_string<char>"
+// CHECK: [[BS:.*]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "basic_string<char>"
// CHECK-SAME: line: 4
// CHECK-SAME: size: 8, align: 8
// CHECK: [[TYPE:![0-9]*]] = !DISubroutineType(types: [[ARGS:.*]])
Modified: cfe/trunk/test/CodeGenCXX/debug-info-template.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-template.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-template.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-info-template.cpp Sun Apr 17 02:45:08 2016
@@ -6,7 +6,7 @@
// CHECK: [[RETAIN]] = !{!{{[0-9]]*}}, [[FOO:![0-9]*]],
-// CHECK: [[TC:![0-9]*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "TC<unsigned int, 2, &glb, &foo::e, &foo::f, &foo::g, 1, 2, 3>"
+// CHECK: [[TC:![0-9]*]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "TC<unsigned int, 2, &glb, &foo::e, &foo::f, &foo::g, 1, 2, 3>"
// CHECK-SAME: templateParams: [[TCARGS:![0-9]*]]
// CHECK: [[TCARGS]] = !{[[TCARG1:![0-9]*]], [[TCARG2:![0-9]*]], [[TCARG3:![0-9]*]], [[TCARG4:![0-9]*]], [[TCARG5:![0-9]*]], [[TCARG6:![0-9]*]], [[TCARG7:![0-9]*]]}
//
@@ -48,7 +48,7 @@
// We could just emit a declaration of 'foo' here, rather than the entire
// definition (same goes for any time we emit a member (function or data)
// pointer type)
-// CHECK: [[FOO]] = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", {{.*}}identifier: "_ZTS3foo")
+// CHECK: [[FOO]] = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "foo", {{.*}}identifier: "_ZTS3foo")
// CHECK: !DISubprogram(name: "f", linkageName: "_ZN3foo1fEv", {{.*}}type: [[FTYPE:![0-9]*]]
//
Modified: cfe/trunk/test/CodeGenCXX/debug-lambda-expressions.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-lambda-expressions.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-lambda-expressions.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-lambda-expressions.cpp Sun Apr 17 02:45:08 2016
@@ -23,7 +23,7 @@ int d(int x) { D y[10]; return [x,y] { r
// CHECK: !DIGlobalVariable(name: "cvar"
// CHECK-SAME: line: [[CVAR_LINE:[0-9]+]]
// CHECK-SAME: type: ![[CVAR_T:[0-9]+]]
-// CHECK: ![[CVAR_T]] = !DICompositeType(tag: DW_TAG_class_type
+// CHECK: ![[CVAR_T]] = distinct !DICompositeType(tag: DW_TAG_class_type
// CHECK-SAME: line: [[CVAR_LINE]],
// CHECK-SAME: elements: ![[CVAR_ARGS:[0-9]+]]
// CHECK: ![[CVAR_ARGS]] = !{!{{[0-9]+}}}
@@ -32,7 +32,7 @@ int d(int x) { D y[10]; return [x,y] { r
// CHECK: !DIGlobalVariable(name: "var"
// CHECK-SAME: line: [[VAR_LINE:[0-9]+]]
// CHECK-SAME: type: ![[VAR_T:[0-9]+]]
-// CHECK: ![[VAR_T]] = !DICompositeType(tag: DW_TAG_class_type
+// CHECK: ![[VAR_T]] = distinct !DICompositeType(tag: DW_TAG_class_type
// CHECK-SAME: line: [[VAR_LINE]],
// CHECK-SAME: elements: ![[VAR_ARGS:[0-9]+]]
// CHECK: ![[VAR_ARGS]] = !{!{{[0-9]+}}}
@@ -41,7 +41,7 @@ int d(int x) { D y[10]; return [x,y] { r
// CHECK: ![[A_FUNC:.*]] = distinct !DISubprogram(name: "a"{{.*}}, line: [[A_LINE:[0-9]+]]{{.*}}, isDefinition: true
// Back to A. -- 78
-// CHECK: ![[LAM_A:.*]] = !DICompositeType(tag: DW_TAG_class_type{{.*}}, scope: ![[A_FUNC]]{{.*}}, line: [[A_LINE]],
+// CHECK: ![[LAM_A:.*]] = distinct !DICompositeType(tag: DW_TAG_class_type{{.*}}, scope: ![[A_FUNC]]{{.*}}, line: [[A_LINE]],
// CHECK-SAME: elements: ![[LAM_A_ARGS:[0-9]+]]
// CHECK: ![[LAM_A_ARGS]] = !{![[CON_LAM_A:[0-9]+]]}
// CHECK: ![[CON_LAM_A]] = !DISubprogram(name: "operator()"
@@ -53,7 +53,7 @@ int d(int x) { D y[10]; return [x,y] { r
// CHECK: ![[B_FUNC:.*]] = distinct !DISubprogram(name: "b"{{.*}}, line: [[B_LINE:[0-9]+]]{{.*}}, isDefinition: true
// Back to B. -- 67
-// CHECK: ![[LAM_B:.*]] = !DICompositeType(tag: DW_TAG_class_type{{.*}}, scope: ![[B_FUNC]]{{.*}}, line: [[B_LINE]],
+// CHECK: ![[LAM_B:.*]] = distinct !DICompositeType(tag: DW_TAG_class_type{{.*}}, scope: ![[B_FUNC]]{{.*}}, line: [[B_LINE]],
// CHECK-SAME: elements: ![[LAM_B_ARGS:[0-9]+]]
// CHECK: ![[LAM_B_ARGS]] = !{![[CAP_B:[0-9]+]], ![[CON_LAM_B:[0-9]+]]}
// CHECK: ![[CAP_B]] = !DIDerivedType(tag: DW_TAG_member, name: "x"
@@ -69,7 +69,7 @@ int d(int x) { D y[10]; return [x,y] { r
// CHECK: ![[C_FUNC:.*]] = distinct !DISubprogram(name: "c"{{.*}}, line: [[C_LINE:[0-9]+]]{{.*}}, isDefinition: true
// Back to C. -- 55
-// CHECK: ![[LAM_C:.*]] = !DICompositeType(tag: DW_TAG_class_type{{.*}}, scope: ![[C_FUNC]]{{.*}}, line: [[C_LINE]],
+// CHECK: ![[LAM_C:.*]] = distinct !DICompositeType(tag: DW_TAG_class_type{{.*}}, scope: ![[C_FUNC]]{{.*}}, line: [[C_LINE]],
// CHECK-SAME: elements: ![[LAM_C_ARGS:[0-9]+]]
// CHECK: ![[LAM_C_ARGS]] = !{![[CAP_C:[0-9]+]], ![[CON_LAM_C:[0-9]+]]}
// CHECK: ![[CAP_C]] = !DIDerivedType(tag: DW_TAG_member, name: "x"
@@ -86,7 +86,7 @@ int d(int x) { D y[10]; return [x,y] { r
// CHECK: ![[D_FUNC:.*]] = distinct !DISubprogram(name: "d"{{.*}}, line: [[D_LINE:[0-9]+]]{{.*}}, isDefinition: true
// Back to D. -- 24
-// CHECK: ![[LAM_D:.*]] = !DICompositeType(tag: DW_TAG_class_type{{.*}}, scope: ![[D_FUNC]]{{.*}}, line: [[D_LINE]],
+// CHECK: ![[LAM_D:.*]] = distinct !DICompositeType(tag: DW_TAG_class_type{{.*}}, scope: ![[D_FUNC]]{{.*}}, line: [[D_LINE]],
// CHECK-SAME: elements: ![[LAM_D_ARGS:[0-9]+]]
// CHECK: ![[LAM_D_ARGS]] = !{![[CAP_D_X:[0-9]+]], ![[CAP_D_Y:[0-9]+]], ![[CON_LAM_D:[0-9]+]]}
// CHECK: ![[CAP_D_X]] = !DIDerivedType(tag: DW_TAG_member, name: "x"
Modified: cfe/trunk/test/Modules/ExtDebugInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Modules/ExtDebugInfo.cpp?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/Modules/ExtDebugInfo.cpp (original)
+++ cfe/trunk/test/Modules/ExtDebugInfo.cpp Sun Apr 17 02:45:08 2016
@@ -91,11 +91,11 @@ void foo() {
// CHECK: !DIGlobalVariable(name: "GlobalUnion",
// CHECK-SAME: type: ![[GLOBAL_UNION:[0-9]+]]
-// CHECK: ![[GLOBAL_UNION]] = !DICompositeType(tag: DW_TAG_union_type,
+// CHECK: ![[GLOBAL_UNION]] = distinct !DICompositeType(tag: DW_TAG_union_type,
// CHECK-SAME: elements: !{{[0-9]+}})
// CHECK: !DIGlobalVariable(name: "GlobalStruct",
// CHECK-SAME: type: ![[GLOBAL_STRUCT:[0-9]+]]
-// CHECK: ![[GLOBAL_STRUCT]] = !DICompositeType(tag: DW_TAG_structure_type,
+// CHECK: ![[GLOBAL_STRUCT]] = distinct !DICompositeType(tag: DW_TAG_structure_type,
// CHECK-SAME: elements: !{{[0-9]+}})
// CHECK: !DIGlobalVariable(name: "anon",
Modified: cfe/trunk/test/Modules/ExtDebugInfo.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Modules/ExtDebugInfo.m?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/Modules/ExtDebugInfo.m (original)
+++ cfe/trunk/test/Modules/ExtDebugInfo.m Sun Apr 17 02:45:08 2016
@@ -32,12 +32,12 @@ int foo(ObjCClass *c) {
// CHECK: !DIGlobalVariable(name: "GlobalUnion",
// CHECK-SAME: type: ![[GLOBAL_UNION:[0-9]+]]
// CHECK: ![[MOD:.*]] = !DIModule(scope: null, name: "DebugObjC
-// CHECK: ![[GLOBAL_UNION]] = !DICompositeType(tag: DW_TAG_union_type,
+// CHECK: ![[GLOBAL_UNION]] = distinct !DICompositeType(tag: DW_TAG_union_type,
// CHECK-SAME: elements: !{{[0-9]+}})
// CHECK: !DIGlobalVariable(name: "GlobalStruct",
// CHECK-SAME: type: ![[GLOBAL_STRUCT:[0-9]+]]
-// CHECK: ![[GLOBAL_STRUCT]] = !DICompositeType(tag: DW_TAG_structure_type,
+// CHECK: ![[GLOBAL_STRUCT]] = distinct !DICompositeType(tag: DW_TAG_structure_type,
// CHECK-SAME: elements: !{{[0-9]+}})
// CHECK: !DIDerivedType(tag: DW_TAG_typedef, name: "TypedefUnion",
Modified: cfe/trunk/test/Modules/ModuleDebugInfo.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Modules/ModuleDebugInfo.m?rev=266556&r1=266555&r2=266556&view=diff
==============================================================================
--- cfe/trunk/test/Modules/ModuleDebugInfo.m (original)
+++ cfe/trunk/test/Modules/ModuleDebugInfo.m Sun Apr 17 02:45:08 2016
@@ -50,7 +50,7 @@
// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "FwdDeclared"
// CHECK-SAME: elements:
-// CHECK: ![[TD_UNION:.*]] = !DICompositeType(tag: DW_TAG_union_type,
+// CHECK: ![[TD_UNION:.*]] = distinct !DICompositeType(tag: DW_TAG_union_type,
// CHECK-NOT: name:
// CHECK-SAME: elements:
// CHECK-SAME: )
@@ -61,7 +61,7 @@
// CHECK: !DIDerivedType(tag: DW_TAG_typedef, name: "TypedefEnum",
// CHECK-SAME: baseType: ![[TD_ENUM:.*]])
-// CHECK: ![[TD_STRUCT:.*]] = !DICompositeType(tag: DW_TAG_structure_type,
+// CHECK: ![[TD_STRUCT:.*]] = distinct !DICompositeType(tag: DW_TAG_structure_type,
// CHECK-NOT: name:
// CHECK-SAME: elements:
// CHECK: !DIDerivedType(tag: DW_TAG_typedef, name: "TypedefStruct",
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