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

1 files changed, 11 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/debug-info-export_symbols.cpp b/clang/test/CodeGenCXX/debug-info-export_symbols.cpp
new file mode 100644
index 00000000000..19697beaf2f
--- /dev/null
+++ b/clang/test/CodeGenCXX/debug-info-export_symbols.cpp
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -emit-llvm -debug-info-kind=standalone -triple %itanium_abi_triple %s -o - | FileCheck %s
+
+// CHECK: [[SCOPE:![0-9]+]] = distinct !DICompositeType({{.*}}flags: DIFlagTypePassByValue
+// CHECK: !DICompositeType(tag: DW_TAG_structure_type, scope: [[SCOPE]]
+// CHECK-SAME:                              DIFlagExportSymbols | DIFlagTypePassByValue
+struct A {
+ // Anonymous class exports its symbols into A
+ struct {
+     int y;
+ };
+} a;