[lldb] [clang] Reland "[clang][DebugInfo] Emit global variable definitions for static data members with constant initializers" (PR #71780)
Michael Buch via cfe-commits
cfe-commits at lists.llvm.org
Thu Nov 9 13:29:42 PST 2023
https://github.com/Michael137 updated https://github.com/llvm/llvm-project/pull/71780
>From e5bc858c35b479d29174c9945c6c67f4d2dc085b Mon Sep 17 00:00:00 2001
From: Michael Buch <michaelbuch12 at gmail.com>
Date: Thu, 9 Nov 2023 01:13:21 +0000
Subject: [PATCH 1/4] Reland "[clang][DebugInfo] Emit global variable
definitions for static data members with constant initializers"
---
clang/lib/CodeGen/CGDebugInfo.cpp | 58 +++++++++++++++----
clang/lib/CodeGen/CGDebugInfo.h | 6 ++
clang/test/CodeGenCXX/debug-info-class.cpp | 13 +++--
.../CodeGenCXX/debug-info-static-member.cpp | 52 ++++++++++-------
.../TestConstStaticIntegralMember.py | 7 ++-
.../lldb-dap/variables/TestDAP_variables.py | 9 +--
6 files changed, 103 insertions(+), 42 deletions(-)
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 84a166d3ac3659c..245f7516640d098 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -1677,22 +1677,13 @@ CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy,
unsigned LineNumber = getLineNumber(Var->getLocation());
StringRef VName = Var->getName();
- llvm::Constant *C = nullptr;
- if (Var->getInit()) {
- const APValue *Value = Var->evaluateValue();
- if (Value) {
- if (Value->isInt())
- C = llvm::ConstantInt::get(CGM.getLLVMContext(), Value->getInt());
- if (Value->isFloat())
- C = llvm::ConstantFP::get(CGM.getLLVMContext(), Value->getFloat());
- }
- }
llvm::DINode::DIFlags Flags = getAccessFlag(Var->getAccess(), RD);
auto Align = getDeclAlignIfRequired(Var, CGM.getContext());
llvm::DIDerivedType *GV = DBuilder.createStaticMemberType(
- RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Align);
+ RecordTy, VName, VUnit, LineNumber, VTy, Flags, /* Val */ nullptr, Align);
StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV);
+ StaticDataMemberDefinitionsToEmit.push_back(Var->getCanonicalDecl());
return GV;
}
@@ -5596,6 +5587,39 @@ void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) {
TemplateParameters, Align));
}
+void CGDebugInfo::EmitGlobalVariable(const VarDecl *VD) {
+ assert(VD->hasInit());
+ assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
+ if (VD->hasAttr<NoDebugAttr>())
+ return;
+
+ auto &GV = DeclCache[VD];
+ if (GV)
+ return;
+
+ auto const *InitVal = VD->evaluateValue();
+ if (!InitVal)
+ return;
+
+ llvm::DIFile *Unit = nullptr;
+ llvm::DIScope *DContext = nullptr;
+ unsigned LineNo;
+ StringRef DeclName, LinkageName;
+ QualType T;
+ llvm::MDTuple *TemplateParameters = nullptr;
+ collectVarDeclProps(VD, Unit, LineNo, T, DeclName, LinkageName,
+ TemplateParameters, DContext);
+
+ auto Align = getDeclAlignIfRequired(VD, CGM.getContext());
+ llvm::DINodeArray Annotations = CollectBTFDeclTagAnnotations(VD);
+ llvm::DIExpression *InitExpr = createConstantValueExpression(VD, *InitVal);
+
+ GV.reset(DBuilder.createGlobalVariableExpression(
+ TheCU, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit),
+ true, true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VD),
+ TemplateParameters, Align, Annotations));
+}
+
void CGDebugInfo::EmitExternalVariable(llvm::GlobalVariable *Var,
const VarDecl *D) {
assert(CGM.getCodeGenOpts().hasReducedDebugInfo());
@@ -5800,6 +5824,18 @@ void CGDebugInfo::setDwoId(uint64_t Signature) {
}
void CGDebugInfo::finalize() {
+ for (auto const *VD : StaticDataMemberDefinitionsToEmit) {
+ assert(VD->isStaticDataMember());
+
+ if (DeclCache.contains(VD))
+ continue;
+
+ if (!VD->hasInit())
+ continue;
+
+ EmitGlobalVariable(VD);
+ }
+
// Creating types might create further types - invalidating the current
// element and the size(), so don't cache/reference them.
for (size_t i = 0; i != ObjCInterfaceCache.size(); ++i) {
diff --git a/clang/lib/CodeGen/CGDebugInfo.h b/clang/lib/CodeGen/CGDebugInfo.h
index 7b60e94555d0608..3e4c133b7f2b9f1 100644
--- a/clang/lib/CodeGen/CGDebugInfo.h
+++ b/clang/lib/CodeGen/CGDebugInfo.h
@@ -161,6 +161,9 @@ class CGDebugInfo {
llvm::DenseMap<const Decl *, llvm::TypedTrackingMDRef<llvm::DIDerivedType>>
StaticDataMemberCache;
+ /// Keeps track of static data members for which we should emit a definition.
+ std::vector<const VarDecl *> StaticDataMemberDefinitionsToEmit;
+
using ParamDecl2StmtTy = llvm::DenseMap<const ParmVarDecl *, const Stmt *>;
using Param2DILocTy =
llvm::DenseMap<const ParmVarDecl *, llvm::DILocalVariable *>;
@@ -526,6 +529,9 @@ class CGDebugInfo {
/// Emit a constant global variable's debug info.
void EmitGlobalVariable(const ValueDecl *VD, const APValue &Init);
+ /// Emit debug-info for a variable with a constant initializer.
+ void EmitGlobalVariable(const VarDecl *VD);
+
/// Emit information about an external variable.
void EmitExternalVariable(llvm::GlobalVariable *GV, const VarDecl *Decl);
diff --git a/clang/test/CodeGenCXX/debug-info-class.cpp b/clang/test/CodeGenCXX/debug-info-class.cpp
index ef84b91b67821a9..a3111cd7c3640a0 100644
--- a/clang/test/CodeGenCXX/debug-info-class.cpp
+++ b/clang/test/CodeGenCXX/debug-info-class.cpp
@@ -116,11 +116,19 @@ int main(int argc, char **argv) {
// CHECK-SAME: DIFlagFwdDecl
// CHECK-NOT: identifier:
// CHECK-SAME: ){{$}}
+
+// CHECK: !DIGlobalVariableExpression(var: ![[HDR_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, 52, DW_OP_stack_value))
+// CHECK: ![[HDR_VAR]] = distinct !DIGlobalVariable(name: "HdrSize",
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[HDR_VAR_DECL:[0-9]+]])
+// CHECK: ![[INT:[0-9]+]] = !DIBasicType(name: "int"
+// CHECK: ![[HDR_VAR_DECL]] = !DIDerivedType(tag: DW_TAG_member, name: "HdrSize"
+
+// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "A"
+
// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "I"
// CHECK-NOT: DIFlagFwdDecl
// CHECK-SAME: ){{$}}
-// CHECK: ![[INT:[0-9]+]] = !DIBasicType(name: "int"
// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "foo"
// CHECK: !DICompositeType(tag: DW_TAG_class_type, name: "bar"
// CHECK: !DICompositeType(tag: DW_TAG_union_type, name: "baz"
@@ -186,8 +194,5 @@ int main(int argc, char **argv) {
// CHECK: [[G_INNER_I]] = !DIDerivedType(tag: DW_TAG_member, name: "j"
// CHECK-SAME: baseType: ![[INT]]
-// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "A"
-// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "HdrSize"
-//
// CHECK: ![[EXCEPTLOC]] = !DILocation(line: 100,
// CHECK: ![[RETLOC]] = !DILocation(line: 99,
diff --git a/clang/test/CodeGenCXX/debug-info-static-member.cpp b/clang/test/CodeGenCXX/debug-info-static-member.cpp
index 260a3afdd6524f3..578995801c6400b 100644
--- a/clang/test/CodeGenCXX/debug-info-static-member.cpp
+++ b/clang/test/CodeGenCXX/debug-info-static-member.cpp
@@ -63,19 +63,19 @@ int C::a = 4;
// CHECK-NOT: offset:
// CHECK-SAME: flags: DIFlagStaticMember)
//
-// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "const_a"
-// CHECK-NOT: size:
-// CHECK-NOT: align:
-// CHECK-NOT: offset:
-// CHECK-SAME: flags: DIFlagStaticMember,
-// CHECK-SAME: extraData: i1 true)
-
-// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "const_b"
-// CHECK-NOT: size:
-// CHECK-NOT: align:
-// CHECK-NOT: offset:
-// CHECK-SAME: flags: DIFlagProtected | DIFlagStaticMember,
-// CHECK-SAME: extraData: float 0x{{.*}})
+// CHECK: ![[CONST_A_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "const_a"
+// CHECK-NOT: size:
+// CHECK-NOT: align:
+// CHECK-NOT: offset:
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: ![[CONST_B_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "const_b"
+// CHECK-NOT: size:
+// CHECK-NOT: align:
+// CHECK-NOT: offset:
+// CHECK-SAME: flags: DIFlagProtected | DIFlagStaticMember
+// CHECK-NOT: extraData:
// CHECK: ![[DECL_C:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "c"
// CHECK-NOT: size:
@@ -83,12 +83,12 @@ int C::a = 4;
// CHECK-NOT: offset:
// CHECK-SAME: flags: DIFlagPublic | DIFlagStaticMember)
//
-// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "const_c"
-// CHECK-NOT: size:
-// CHECK-NOT: align:
-// CHECK-NOT: offset:
-// CHECK-SAME: flags: DIFlagPublic | DIFlagStaticMember,
-// CHECK-SAME: extraData: i32 18)
+// CHECK: ![[CONST_C_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "const_c"
+// CHECK-NOT: size:
+// CHECK-NOT: align:
+// CHECK-NOT: offset:
+// CHECK-SAME: flags: DIFlagPublic | DIFlagStaticMember
+// CHECK-NOT: extraData:
//
// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "x_a"
// CHECK-SAME: flags: DIFlagPublic | DIFlagStaticMember)
@@ -144,7 +144,7 @@ struct V {
// const_va is not emitted for MS targets.
// NOT-MS: !DIDerivedType(tag: DW_TAG_member, name: "const_va",
// NOT-MS-SAME: line: [[@LINE-5]]
-// NOT-MS-SAME: extraData: i32 42
+// NOT-MS-NOT: extraData:
const int V::const_va;
namespace x {
@@ -156,3 +156,15 @@ struct y {
};
int y::z;
}
+
+// CHECK: !DIGlobalVariableExpression(var: ![[CONST_A_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, 1, DW_OP_stack_value))
+// CHECK: ![[CONST_A_VAR]] = distinct !DIGlobalVariable(name: "const_a"
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[CONST_A_DECL]])
+
+// CHECK: !DIGlobalVariableExpression(var: ![[CONST_B_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, {{.*}}, DW_OP_stack_value))
+// CHECK: ![[CONST_B_VAR]] = distinct !DIGlobalVariable(name: "const_b"
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[CONST_B_DECL]])
+
+// CHECK: !DIGlobalVariableExpression(var: ![[CONST_C_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, 18, DW_OP_stack_value))
+// CHECK: ![[CONST_C_VAR]] = distinct !DIGlobalVariable(name: "const_c"
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[CONST_C_DECL]])
diff --git a/lldb/test/API/lang/cpp/const_static_integral_member/TestConstStaticIntegralMember.py b/lldb/test/API/lang/cpp/const_static_integral_member/TestConstStaticIntegralMember.py
index 530191e8a37ba1b..78ea23ac8f70610 100644
--- a/lldb/test/API/lang/cpp/const_static_integral_member/TestConstStaticIntegralMember.py
+++ b/lldb/test/API/lang/cpp/const_static_integral_member/TestConstStaticIntegralMember.py
@@ -102,9 +102,10 @@ def test(self):
# it does not crash.
self.expect("image lookup -t A")
- # dsymutil strips the debug info for classes that only have const static
- # data members without a definition namespace scope.
- @expectedFailureAll(debug_info=["dsym"])
+ # For debug-info produced by older versions of clang, dsymutil strips the
+ # debug info for classes that only have const static data members without
+ # definitions.
+ @expectedFailureAll(compiler=["clang"], compiler_version=["<", "18.0"])
def test_class_with_only_const_static(self):
self.build()
lldbutil.run_to_source_breakpoint(
diff --git a/lldb/test/API/tools/lldb-dap/variables/TestDAP_variables.py b/lldb/test/API/tools/lldb-dap/variables/TestDAP_variables.py
index 11d9bf18db7a6e1..d2a21ad3cd1d44f 100644
--- a/lldb/test/API/tools/lldb-dap/variables/TestDAP_variables.py
+++ b/lldb/test/API/tools/lldb-dap/variables/TestDAP_variables.py
@@ -87,10 +87,11 @@ def verify_values(self, verify_dict, actual, varref_dict=None, expression=None):
def verify_variables(self, verify_dict, variables, varref_dict=None):
for variable in variables:
name = variable["name"]
- self.assertIn(
- name, verify_dict, 'variable "%s" in verify dictionary' % (name)
- )
- self.verify_values(verify_dict[name], variable, varref_dict)
+ if not name.startswith("std::"):
+ self.assertIn(
+ name, verify_dict, 'variable "%s" in verify dictionary' % (name)
+ )
+ self.verify_values(verify_dict[name], variable, varref_dict)
def darwin_dwarf_missing_obj(self, initCommands):
self.build(debug_info="dwarf")
>From 78369ca3ba13e228811971273ed3eb9225f6fd09 Mon Sep 17 00:00:00 2001
From: Michael Buch <michaelbuch12 at gmail.com>
Date: Thu, 9 Nov 2023 07:05:23 +0000
Subject: [PATCH 2/4] fixup! add missing test file
---
.../debug-info-static-inline-member.cpp | 108 ++++++++++++++++++
1 file changed, 108 insertions(+)
create mode 100644 clang/test/CodeGenCXX/debug-info-static-inline-member.cpp
diff --git a/clang/test/CodeGenCXX/debug-info-static-inline-member.cpp b/clang/test/CodeGenCXX/debug-info-static-inline-member.cpp
new file mode 100644
index 000000000000000..06d4899752f349f
--- /dev/null
+++ b/clang/test/CodeGenCXX/debug-info-static-inline-member.cpp
@@ -0,0 +1,108 @@
+// RUN: %clangxx -target arm64-apple-macosx11.0.0 -g -debug-info-kind=standalone %s -emit-llvm -S -o - | FileCheck --check-prefixes=CHECK %s
+// RUN: %clangxx -target arm64-apple-macosx11.0.0 -g -debug-info-kind=limited %s -emit-llvm -S -o - | FileCheck --check-prefixes=CHECK %s
+
+enum class Enum : int {
+ VAL = -1
+};
+
+struct Empty {};
+struct Fwd;
+
+constexpr auto func() { return 25; }
+
+struct Foo {
+ static constexpr int cexpr_int_with_addr = func();
+ static constexpr int cexpr_int2 = func() + 1;
+ static constexpr float cexpr_float = 2.0 + 1.0;
+ static constexpr Enum cexpr_enum = Enum::VAL;
+ static constexpr Empty cexpr_struct_with_addr{};
+ static inline Enum inline_enum = Enum::VAL;
+
+ template<typename T, unsigned V>
+ static constexpr auto cexpr_template = V;
+
+ static const auto empty_templated = cexpr_template<Fwd, 1>;
+};
+
+int main() {
+ Foo f;
+ //Bar b;
+
+ // Force global variable definitions to be emitted.
+ (void)&Foo::cexpr_int_with_addr;
+ (void)&Foo::cexpr_struct_with_addr;
+
+ return Foo::cexpr_int_with_addr + Foo::cexpr_float
+ + (int)Foo::cexpr_enum + Foo::cexpr_template<short, 5>
+ + Foo::empty_templated;
+}
+
+// CHECK: @{{.*}}cexpr_int_with_addr{{.*}} =
+// CHECK-SAME: !dbg ![[INT_GLOBAL:[0-9]+]]
+
+// CHECK: @{{.*}}cexpr_struct_with_addr{{.*}} =
+// CHECK-SAME !dbg ![[EMPTY_GLOBAL:[0-9]+]]
+
+// CHECK: !DIGlobalVariableExpression(var: ![[INT_VAR:[0-9]+]], expr: !DIExpression())
+// CHECK: ![[INT_VAR]] = distinct !DIGlobalVariable(name: "cexpr_int_with_addr", linkageName:
+// CHECK-SAME: isLocal: false, isDefinition: true, declaration: ![[INT_DECL:[0-9]+]])
+
+// CHECK: ![[INT_DECL]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_int_with_addr",
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: ![[INT_DECL2:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_int2",
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: ![[FLOAT_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_float",
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: ![[ENUM_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_enum",
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: ![[EMPTY_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_struct_with_addr",
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: ![[IENUM_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "inline_enum",
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: ![[EMPTY_TEMPLATED_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "empty_templated",
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: ![[TEMPLATE_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_template",
+// CHECK-SAME: flags: DIFlagStaticMember
+// CHECK-NOT: extraData:
+
+// CHECK: !DIGlobalVariableExpression(var: ![[EMPTY_VAR:[0-9]+]], expr: !DIExpression())
+// CHECK: ![[EMPTY_VAR]] = distinct !DIGlobalVariable(name: "cexpr_struct_with_addr", linkageName:
+// CHECK-SAME: isLocal: false, isDefinition: true, declaration: ![[EMPTY_DECL]])
+
+// CHECK: !DIGlobalVariableExpression(var: ![[INT_VAR2:[0-9]+]], expr: !DIExpression(DW_OP_constu, 26, DW_OP_stack_value))
+// CHECK: ![[INT_VAR2]] = distinct !DIGlobalVariable(name: "cexpr_int2", linkageName:
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[INT_DECL2]])
+
+// CHECK: !DIGlobalVariableExpression(var: ![[FLOAT_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, {{.*}}, DW_OP_stack_value))
+// CHECK: ![[FLOAT_VAR]] = distinct !DIGlobalVariable(name: "cexpr_float", linkageName:
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[FLOAT_DECL]])
+
+// CHECK: !DIGlobalVariableExpression(var: ![[ENUM_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, {{.*}}, DW_OP_stack_value))
+// CHECK: ![[ENUM_VAR]] = distinct !DIGlobalVariable(name: "cexpr_enum", linkageName:
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[ENUM_DECL]])
+
+// CHECK: !DIGlobalVariableExpression(var: ![[IENUM_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, {{.*}}, DW_OP_stack_value))
+// CHECK: ![[IENUM_VAR]] = distinct !DIGlobalVariable(name: "inline_enum", linkageName:
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[IENUM_DECL]])
+
+// CHECK: !DIGlobalVariableExpression(var: ![[EMPTY_TEMPLATED_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, 1, DW_OP_stack_value))
+// CHECK: ![[EMPTY_TEMPLATED_VAR]] = distinct !DIGlobalVariable(name: "empty_templated", linkageName:
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[EMPTY_TEMPLATED_DECL]])
+
+// CHECK: !DIGlobalVariableExpression(var: ![[TEMPLATE_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, 5, DW_OP_stack_value))
+// CHECK: ![[TEMPLATE_VAR]] = distinct !DIGlobalVariable(name: "cexpr_template", linkageName:
+// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[TEMPLATE_DECL]], templateParams: ![[TEMPLATE_PARMS_2:[0-9]+]])
>From 4784e02edb23b23a6e2cabfa3f7eb20c3ee441c4 Mon Sep 17 00:00:00 2001
From: Michael Buch <michaelbuch12 at gmail.com>
Date: Thu, 9 Nov 2023 21:27:54 +0000
Subject: [PATCH 3/4] fixup! don't attach linkage names to constants
---
clang/lib/CodeGen/CGDebugInfo.cpp | 4 +++-
.../debug-info-static-inline-member.cpp | 18 ++++++++++++------
2 files changed, 15 insertions(+), 7 deletions(-)
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 245f7516640d098..20d7f17669481cc 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -5614,8 +5614,10 @@ void CGDebugInfo::EmitGlobalVariable(const VarDecl *VD) {
llvm::DINodeArray Annotations = CollectBTFDeclTagAnnotations(VD);
llvm::DIExpression *InitExpr = createConstantValueExpression(VD, *InitVal);
+ // Omit linkage name for variable definitions that represent constants.
+ // There hasn't been a need from consumers yet to have it attached.
GV.reset(DBuilder.createGlobalVariableExpression(
- TheCU, DeclName, LinkageName, Unit, LineNo, getOrCreateType(T, Unit),
+ TheCU, DeclName, /* LinkageName */ {}, Unit, LineNo, getOrCreateType(T, Unit),
true, true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VD),
TemplateParameters, Align, Annotations));
}
diff --git a/clang/test/CodeGenCXX/debug-info-static-inline-member.cpp b/clang/test/CodeGenCXX/debug-info-static-inline-member.cpp
index 06d4899752f349f..bfb7ad6b80fabf3 100644
--- a/clang/test/CodeGenCXX/debug-info-static-inline-member.cpp
+++ b/clang/test/CodeGenCXX/debug-info-static-inline-member.cpp
@@ -84,25 +84,31 @@ int main() {
// CHECK-SAME: isLocal: false, isDefinition: true, declaration: ![[EMPTY_DECL]])
// CHECK: !DIGlobalVariableExpression(var: ![[INT_VAR2:[0-9]+]], expr: !DIExpression(DW_OP_constu, 26, DW_OP_stack_value))
-// CHECK: ![[INT_VAR2]] = distinct !DIGlobalVariable(name: "cexpr_int2", linkageName:
+// CHECK: ![[INT_VAR2]] = distinct !DIGlobalVariable(name: "cexpr_int2"
+// CHECK-NOT: linkageName:
// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[INT_DECL2]])
// CHECK: !DIGlobalVariableExpression(var: ![[FLOAT_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, {{.*}}, DW_OP_stack_value))
-// CHECK: ![[FLOAT_VAR]] = distinct !DIGlobalVariable(name: "cexpr_float", linkageName:
+// CHECK: ![[FLOAT_VAR]] = distinct !DIGlobalVariable(name: "cexpr_float"
+// CHECK-NOT: linkageName:
// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[FLOAT_DECL]])
// CHECK: !DIGlobalVariableExpression(var: ![[ENUM_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, {{.*}}, DW_OP_stack_value))
-// CHECK: ![[ENUM_VAR]] = distinct !DIGlobalVariable(name: "cexpr_enum", linkageName:
+// CHECK: ![[ENUM_VAR]] = distinct !DIGlobalVariable(name: "cexpr_enum"
+// CHECK-NOT: linkageName:
// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[ENUM_DECL]])
// CHECK: !DIGlobalVariableExpression(var: ![[IENUM_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, {{.*}}, DW_OP_stack_value))
-// CHECK: ![[IENUM_VAR]] = distinct !DIGlobalVariable(name: "inline_enum", linkageName:
+// CHECK: ![[IENUM_VAR]] = distinct !DIGlobalVariable(name: "inline_enum"
+// CHECK-NOT: linkageName:
// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[IENUM_DECL]])
// CHECK: !DIGlobalVariableExpression(var: ![[EMPTY_TEMPLATED_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, 1, DW_OP_stack_value))
-// CHECK: ![[EMPTY_TEMPLATED_VAR]] = distinct !DIGlobalVariable(name: "empty_templated", linkageName:
+// CHECK: ![[EMPTY_TEMPLATED_VAR]] = distinct !DIGlobalVariable(name: "empty_templated"
+// CHECK-NOT: linkageName:
// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[EMPTY_TEMPLATED_DECL]])
// CHECK: !DIGlobalVariableExpression(var: ![[TEMPLATE_VAR:[0-9]+]], expr: !DIExpression(DW_OP_constu, 5, DW_OP_stack_value))
-// CHECK: ![[TEMPLATE_VAR]] = distinct !DIGlobalVariable(name: "cexpr_template", linkageName:
+// CHECK: ![[TEMPLATE_VAR]] = distinct !DIGlobalVariable(name: "cexpr_template"
+// CHECK-NOT: linkageName:
// CHECK-SAME: isLocal: true, isDefinition: true, declaration: ![[TEMPLATE_DECL]], templateParams: ![[TEMPLATE_PARMS_2:[0-9]+]])
>From 3bdaa9870a78c9390f199a0aab34b157877ae0ae Mon Sep 17 00:00:00 2001
From: Michael Buch <michaelbuch12 at gmail.com>
Date: Thu, 9 Nov 2023 21:29:30 +0000
Subject: [PATCH 4/4] fixup! clang-format
---
clang/lib/CodeGen/CGDebugInfo.cpp | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 20d7f17669481cc..b336c5b8e3ac486 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -5617,9 +5617,10 @@ void CGDebugInfo::EmitGlobalVariable(const VarDecl *VD) {
// Omit linkage name for variable definitions that represent constants.
// There hasn't been a need from consumers yet to have it attached.
GV.reset(DBuilder.createGlobalVariableExpression(
- TheCU, DeclName, /* LinkageName */ {}, Unit, LineNo, getOrCreateType(T, Unit),
- true, true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VD),
- TemplateParameters, Align, Annotations));
+ TheCU, DeclName, /* LinkageName */ {}, Unit, LineNo,
+ getOrCreateType(T, Unit), true, true, InitExpr,
+ getOrCreateStaticDataMemberDeclarationOrNull(VD), TemplateParameters,
+ Align, Annotations));
}
void CGDebugInfo::EmitExternalVariable(llvm::GlobalVariable *Var,
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