From: Eric Christopher <echristo@apple.com>
Date: Fri, 1 Jun 2012 00:22:57 +0000 (+0000)
Subject: Support C++11 enum forward declarations.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5a2eff85d185ad94b6272a6f6c869496d8c23ced;p=clang

Support C++11 enum forward declarations.

Part of rdar://11570854

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157787 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 3899604d75..e8791751f5 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -1588,10 +1588,11 @@ llvm::DIType CGDebugInfo::CreateEnumType(const EnumDecl *ED) {
     getContextDescriptor(cast<Decl>(ED->getDeclContext()));
   llvm::DIType ClassTy = ED->isScopedUsingClassTag() ?
     getOrCreateType(ED->getIntegerType(), DefUnit) : llvm::DIType();
+  unsigned Flags = !ED->isCompleteDefinition() ? llvm::DIDescriptor::FlagFwdDecl : 0;
   llvm::DIType DbgTy = 
     DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit, Line,
                                    Size, Align, EltArray,
-                                   ClassTy);
+                                   ClassTy, Flags);
   return DbgTy;
 }
 
diff --git a/test/CodeGenCXX/debug-info-enum-class.cpp b/test/CodeGenCXX/debug-info-enum-class.cpp
index e2d461943c..6f88439b1e 100644
--- a/test/CodeGenCXX/debug-info-enum-class.cpp
+++ b/test/CodeGenCXX/debug-info-enum-class.cpp
@@ -3,10 +3,13 @@
 enum class A { A1=1 };                 // underlying type is int by default
 enum class B: unsigned long { B1=1 };  // underlying type is unsigned long
 enum C { C1 = 1 };
+enum D : short; // enum forward declaration
 A a;
 B b;
 C c;
+D d;
 
 // CHECK: metadata !{i32 {{.*}}, null, metadata !"A", metadata !4, i32 3, i64 32, i64 32, i32 0, i32 0, metadata !5, metadata !6, i32 0, i32 0} ; [ DW_TAG_enumeration_type ]
 // CHECK: metadata !{i32 {{.*}}, null, metadata !"B", metadata !4, i32 4, i64 64, i64 64, i32 0, i32 0, metadata !9, metadata !10, i32 0, i32 0} ; [ DW_TAG_enumeration_type ]
 // CHECK: metadata !{i32 {{.*}}, null, metadata !"C", metadata !4, i32 5, i64 32, i64 32, i32 0, i32 0, null, metadata !13, i32 0, i32 0} ; [ DW_TAG_enumeration_type ]
+// CHECK: metadata !{i32 {{.*}}, null, metadata !"D", metadata !4, i32 6, i64 16, i64 16, i32 0, i32 4, null, metadata !16, i32 0, i32 0} ; [ DW_TAG_enumeration_type ]