From 1601a4a5da8b895fa598efc9e0e736aae5bf00c5 Mon Sep 17 00:00:00 2001
From: David Blaikie <dblaikie@gmail.com>
Date: Fri, 26 Apr 2013 05:41:06 +0000
Subject: [PATCH] Support debug info for using directives at global/namespace
 scope.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180594 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CodeGenModule.cpp            |  5 ++++-
 test/CodeGenCXX/debug-info-namespace.cpp | 13 +++++++++----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 5a10602589..bf67bd1007 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -2819,7 +2819,6 @@ void CodeGenModule::EmitTopLevelDecl(Decl *D) {
     // No code generation needed.
   case Decl::UsingShadow:
   case Decl::Using:
-  case Decl::UsingDirective:
   case Decl::ClassTemplate:
   case Decl::FunctionTemplate:
   case Decl::TypeAliasTemplate:
@@ -2827,6 +2826,10 @@ void CodeGenModule::EmitTopLevelDecl(Decl *D) {
   case Decl::Block:
   case Decl::Empty:
     break;
+  case Decl::UsingDirective: // using namespace X; [C++]
+    if (CGDebugInfo *DI = getModuleDebugInfo())
+      DI->EmitUsingDirective(cast<UsingDirectiveDecl>(*D));
+    return;
   case Decl::CXXConstructor:
     // Skip function templates
     if (cast<FunctionDecl>(D)->getDescribedFunctionTemplate() ||
diff --git a/test/CodeGenCXX/debug-info-namespace.cpp b/test/CodeGenCXX/debug-info-namespace.cpp
index 89dd6d947f..1033bce943 100644
--- a/test/CodeGenCXX/debug-info-namespace.cpp
+++ b/test/CodeGenCXX/debug-info-namespace.cpp
@@ -5,22 +5,27 @@ namespace A {
 namespace B {
 int i;
 }
+using namespace B;
 }
 
+using namespace A;
+
 int func() {
   using namespace A::B;
   return i;
 }
 
-// CHECK: [[MODULES:![0-9]*]], metadata !""} ; [ DW_TAG_compile_unit ]
+// CHECK: [[CU:![0-9]*]] = {{.*}}[[MODULES:![0-9]*]], metadata !""} ; [ DW_TAG_compile_unit ]
 // CHECK: [[FILE:![0-9]*]] {{.*}}debug-info-namespace.cpp"
-// CHECK: [[FUNC:![0-9]*]] {{.*}} ; [ DW_TAG_subprogram ] [line 6] [def] [func]
+// CHECK: [[FUNC:![0-9]*]] {{.*}} ; [ DW_TAG_subprogram ] [line 9] [def] [func]
 // CHECK: [[FILE2:![0-9]*]]} ; [ DW_TAG_file_type ] [{{.*}}foo.cpp]
 // CHECK: [[VAR:![0-9]*]] = {{.*}}, metadata [[NS:![0-9]*]], metadata !"i", {{.*}} ; [ DW_TAG_variable ] [i]
 // CHECK: [[NS]] = {{.*}}, metadata [[FILE2]], metadata [[CTXT:![0-9]*]], {{.*}} ; [ DW_TAG_namespace ] [B] [line 1]
 // CHECK: [[CTXT]] = {{.*}}, metadata [[FILE]], null, {{.*}} ; [ DW_TAG_namespace ] [A] [line 3]
-// CHECK: [[MODULES]] = metadata !{metadata [[MODULE:![0-9]*]]}
-// CHECK: [[MODULE]] = metadata !{i32 {{[0-9]*}}, metadata [[FUNC]], metadata [[NS]], i32 7} ; [ DW_TAG_imported_module ]
+// CHECK: [[MODULES]] = metadata !{metadata [[M1:![0-9]*]], metadata [[M2:![0-9]*]], metadata [[M3:![0-9]*]]}
+// CHECK: [[M1]] = metadata !{i32 {{[0-9]*}}, metadata [[CTXT]], metadata [[NS]], i32 4} ; [ DW_TAG_imported_module ]
+// CHECK: [[M2]] = metadata !{i32 {{[0-9]*}}, metadata [[CU]], metadata [[CTXT]], i32 7} ; [ DW_TAG_imported_module ]
+// CHECK: [[M3]] = metadata !{i32 {{[0-9]*}}, metadata [[FUNC]], metadata [[NS]], i32 10} ; [ DW_TAG_imported_module ]
 
 // FIXME: It is confused on win32 to generate file entry when dosish filename is given.
 // REQUIRES: shell
-- 
2.40.0