Debug Info: Support for DW_AT_export_symbols for anonymous structs
This implements the DWARF 5 feature described in:
http://dwarfstd.org/ShowIssue.php?issue=141212.1
To support recognizing anonymous structs:
struct A {
struct { // Anonymous struct
int y;
};
} a;
This patch adds support in CGDebugInfo::CreateLimitedType(...) for this new flag and an accompanying test to verify this feature.
Differential Revision: https://reviews.llvm.org/D66667
llvm-svn: 370107
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 422fbc1..b1f82d4 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -3121,7 +3121,8 @@
SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
- // Explicitly record the calling convention for C++ records.
+ // Explicitly record the calling convention and export symbols for C++
+ // records.
auto Flags = llvm::DINode::FlagZero;
if (auto CXXRD = dyn_cast<CXXRecordDecl>(RD)) {
if (CGM.getCXXABI().getRecordArgABI(CXXRD) == CGCXXABI::RAA_Indirect)
@@ -3132,6 +3133,10 @@
// Record if a C++ record is non-trivial type.
if (!CXXRD->isTrivial())
Flags |= llvm::DINode::FlagNonTrivial;
+
+ // Record exports it symbols to the containing structure.
+ if (CXXRD->isAnonymousStructOrUnion())
+ Flags |= llvm::DINode::FlagExportSymbols;
}
llvm::DICompositeType *RealDecl = DBuilder.createReplaceableCompositeType(