[clang][DebugInfo] Don't emit VTable debug symbols for -gline-tables-only. #151025
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…only. The -gline-tables-only option emits minimal debug info for functions, files and line numbers while omitting variables, parameters and most type information. VTable debug symbols are emitted to facilitate a debugger's ability to perform automatic type promotion on variables and parameters. With variables and parameters being omitted, the VTable symbols are unnecessary.
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@llvm/pr-subscribers-clang-codegen Author: Steve Merritt (stevemerr) ChangesThe -gline-tables-only option emits minimal debug info for functions, files and line numbers while omitting variables, parameters and most type information. VTable debug symbols are emitted to facilitate a debugger's ability to perform automatic type promotion on variables and parameters. With variables and parameters being omitted, the VTable symbols are unnecessary. Full diff: https://github.com/llvm/llvm-project/pull/151025.diff 2 Files Affected:
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index a371b6755f74d..6d428f0b7fef5 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -2641,6 +2641,8 @@ void CGDebugInfo::emitVTableSymbol(llvm::GlobalVariable *VTable,
const CXXRecordDecl *RD) {
if (!CGM.getTarget().getCXXABI().isItaniumFamily())
return;
+ if (DebugKind <= llvm::codegenoptions::DebugLineTablesOnly)
+ return;
ASTContext &Context = CGM.getContext();
StringRef SymbolName = "_vtable$";
diff --git a/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp b/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
index 9b86a49d69f5b..192169b0ab798 100644
--- a/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
+++ b/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
@@ -14,9 +14,11 @@ class E : public C {
// CHECK-NOT: DW_TAG_reference type
void x(const D& d);
};
+// CHECK-NOT: DW_TAG_structure_type
struct F {
enum X { };
void func(X);
+ // CHECK-NOT: DW_TAG_member
virtual ~F();
};
F::~F() {
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@llvm/pr-subscribers-clang Author: Steve Merritt (stevemerr) ChangesThe -gline-tables-only option emits minimal debug info for functions, files and line numbers while omitting variables, parameters and most type information. VTable debug symbols are emitted to facilitate a debugger's ability to perform automatic type promotion on variables and parameters. With variables and parameters being omitted, the VTable symbols are unnecessary. Full diff: https://github.com/llvm/llvm-project/pull/151025.diff 2 Files Affected:
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index a371b6755f74d..6d428f0b7fef5 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -2641,6 +2641,8 @@ void CGDebugInfo::emitVTableSymbol(llvm::GlobalVariable *VTable,
const CXXRecordDecl *RD) {
if (!CGM.getTarget().getCXXABI().isItaniumFamily())
return;
+ if (DebugKind <= llvm::codegenoptions::DebugLineTablesOnly)
+ return;
ASTContext &Context = CGM.getContext();
StringRef SymbolName = "_vtable$";
diff --git a/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp b/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
index 9b86a49d69f5b..192169b0ab798 100644
--- a/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
+++ b/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
@@ -14,9 +14,11 @@ class E : public C {
// CHECK-NOT: DW_TAG_reference type
void x(const D& d);
};
+// CHECK-NOT: DW_TAG_structure_type
struct F {
enum X { };
void func(X);
+ // CHECK-NOT: DW_TAG_member
virtual ~F();
};
F::~F() {
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@llvm/pr-subscribers-debuginfo Author: Steve Merritt (stevemerr) ChangesThe -gline-tables-only option emits minimal debug info for functions, files and line numbers while omitting variables, parameters and most type information. VTable debug symbols are emitted to facilitate a debugger's ability to perform automatic type promotion on variables and parameters. With variables and parameters being omitted, the VTable symbols are unnecessary. Full diff: https://github.com/llvm/llvm-project/pull/151025.diff 2 Files Affected:
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index a371b6755f74d..6d428f0b7fef5 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -2641,6 +2641,8 @@ void CGDebugInfo::emitVTableSymbol(llvm::GlobalVariable *VTable,
const CXXRecordDecl *RD) {
if (!CGM.getTarget().getCXXABI().isItaniumFamily())
return;
+ if (DebugKind <= llvm::codegenoptions::DebugLineTablesOnly)
+ return;
ASTContext &Context = CGM.getContext();
StringRef SymbolName = "_vtable$";
diff --git a/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp b/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
index 9b86a49d69f5b..192169b0ab798 100644
--- a/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
+++ b/clang/test/CodeGenCXX/debug-info-gline-tables-only.cpp
@@ -14,9 +14,11 @@ class E : public C {
// CHECK-NOT: DW_TAG_reference type
void x(const D& d);
};
+// CHECK-NOT: DW_TAG_structure_type
struct F {
enum X { };
void func(X);
+ // CHECK-NOT: DW_TAG_member
virtual ~F();
};
F::~F() {
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Thanks. |
3 participants
The -gline-tables-only option emits minimal debug info for functions, files and line numbers while omitting variables, parameters and most type information. VTable debug symbols are emitted to facilitate a debugger's ability to perform automatic type promotion on variables and parameters. With variables and parameters being omitted, the VTable symbols are unnecessary.