Skip to content

[clang][DebugInfo] Revert to attaching DW_AT_const_value on static member declarations #73626

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Michael137 merged 2 commits into from
Nov 28, 2023
Merged

[clang][DebugInfo] Revert to attaching DW_AT_const_value on static member declarations #73626

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
aabd300
[clang][DebugInfo] Revert to attaching DW_AT_const_value on static me…
Michael137 Nov 28, 2023
64fcf57
fixup! fix tests
Michael137 Nov 28, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 15 additions & 3 deletions clang/lib/CodeGen/CGDebugInfo.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1678,14 +1678,26 @@ CGDebugInfo::CreateRecordStaticField(const VarDecl *Var, llvm::DIType *RecordTy,
unsigned LineNumber = getLineNumber(Var->getLocation());
StringRef VName = Var->getName();

// FIXME: to avoid complications with type merging we should
// emit the constant on the definition instead of the declaration.
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 Tag = CGM.getCodeGenOpts().DwarfVersion >= 5
? llvm::dwarf::DW_TAG_variable
: llvm::dwarf::DW_TAG_member;
auto Align = getDeclAlignIfRequired(Var, CGM.getContext());
llvm::DIDerivedType *GV =
DBuilder.createStaticMemberType(RecordTy, VName, VUnit, LineNumber, VTy,
Flags, /* Val */ nullptr, Tag, Align);
llvm::DIDerivedType *GV = DBuilder.createStaticMemberType(
RecordTy, VName, VUnit, LineNumber, VTy, Flags, C, Tag, Align);
StaticDataMemberCache[Var->getCanonicalDecl()].reset(GV);
StaticDataMemberDefinitionsToEmit.push_back(Var->getCanonicalDecl());
return GV;
Expand Down
14 changes: 7 additions & 7 deletions clang/test/CodeGenCXX/debug-info-static-inline-member.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,35 +49,35 @@ int main() {

// CHECK: ![[INT_DECL]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_int_with_addr",
// CHECK-SAME: flags: DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: i32 25

// CHECK: ![[INT_DECL2:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_int2",
// CHECK-SAME: flags: DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: i32 26

// CHECK: ![[FLOAT_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_float",
// CHECK-SAME: flags: DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: float

// CHECK: ![[ENUM_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_enum",
// CHECK-SAME: flags: DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: i32 -1

// 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-SAME: extraData: i32 -1

// CHECK: ![[EMPTY_TEMPLATED_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "empty_templated",
// CHECK-SAME: flags: DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: i32 1

// CHECK: ![[TEMPLATE_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "cexpr_template",
// CHECK-SAME: flags: DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: i32 1

// CHECK: !DIGlobalVariableExpression(var: ![[EMPTY_VAR:[0-9]+]], expr: !DIExpression())
// CHECK: ![[EMPTY_VAR]] = distinct !DIGlobalVariable(name: "cexpr_struct_with_addr", linkageName:
Expand Down
8 changes: 4 additions & 4 deletions clang/test/CodeGenCXX/debug-info-static-member.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -74,15 +74,15 @@ int C::a = 4;
// CHECK-NOT: align:
// CHECK-NOT: offset:
// CHECK-SAME: flags: DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: i1 true

// DWARF4: ![[CONST_B_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "const_b"
// DWARF5: ![[CONST_B_DECL:[0-9]+]] = !DIDerivedType(tag: DW_TAG_variable, name: "const_b"
// CHECK-NOT: size:
// CHECK-NOT: align:
// CHECK-NOT: offset:
// CHECK-SAME: flags: DIFlagProtected | DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: float

// DWARF4: ![[DECL_C:[0-9]+]] = !DIDerivedType(tag: DW_TAG_member, name: "c"
// DWARF5: ![[DECL_C:[0-9]+]] = !DIDerivedType(tag: DW_TAG_variable, name: "c"
Expand All @@ -97,7 +97,7 @@ int C::a = 4;
// CHECK-NOT: align:
// CHECK-NOT: offset:
// CHECK-SAME: flags: DIFlagPublic | DIFlagStaticMember
// CHECK-NOT: extraData:
// CHECK-SAME: extraData: i32 18
//
// DWARF4: !DIDerivedType(tag: DW_TAG_member, name: "x_a"
// DWARF5: !DIDerivedType(tag: DW_TAG_variable, name: "x_a"
Expand Down Expand Up @@ -154,7 +154,7 @@ 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-NOT: extraData:
// NOT-MS-SAME: extraData: i32 42
const int V::const_va;

namespace x {
Expand Down