Debug Info: Fix a problem that resulted in missing DW_AT_specifications

for C++ constructors.

If the DIType for a class was generated by
CGDebugInfo::createContextChain(), the cache contains only a
limited DIType wihtout any declarations. Since EmitFunctionStart()
needs to find the canonical declaration for each method, we
construct the complete type before emitting any method.

rdar://problem/13116508

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181561 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 61 insertions, 0 deletions

diff --git a/test/CodeGenCXX/debug-info-decl-nested.cpp b/test/CodeGenCXX/debug-info-decl-nested.cpp
new file mode 100644
index 0000000000..7c8bd1facf
--- /dev/null
+++ b/test/CodeGenCXX/debug-info-decl-nested.cpp
@@ -0,0 +1,61 @@
+// RUN: %clang_cc1 -std=c++11 -g -O0 -emit-llvm -g -triple x86_64-apple-darwin %s -o %t
+// RUN: cat %t | FileCheck %s -check-prefix=CHECK0
+// RUN: cat %t | FileCheck %s -check-prefix=CHECK1
+// RUN: cat %t | FileCheck %s -check-prefix=CHECK2
+//
+// This test ensures that we associate a declaration with the
+// definition of the constructor for OuterClass. The declaration is
+// necessary so the backend can emit the DW_AT_specification attribute
+// for the definition.
+//
+// rdar://problem/13116508
+
+class Foo;
+class OuterClass
+{
+  static class InnerClass {
+  public:
+    InnerClass(); // Here createContextChain() generates a limited type for OuterClass.
+  } theInnerClass;
+// CHECK0: [[DECL:[0-9]+]] = {{.*}} ; [ DW_TAG_subprogram ] [line [[@LINE+1]]] [private] [OuterClass]
+  OuterClass(const Foo *); // line 10
+};
+OuterClass::InnerClass OuterClass::theInnerClass; // This toplevel decl causes InnerClass to be generated.
+// CHECK0: metadata {{.*}}, metadata ![[DECL]], metadata {{.*}}, i32 [[@LINE+1]]} ; [ DW_TAG_subprogram ] [line [[@LINE+1]]] [def] [OuterClass]
+OuterClass::OuterClass(const Foo *meta) { } // line 13
+
+
+
+
+
+class Foo1;
+class OuterClass1
+{
+  static class InnerClass1 {
+  public:
+    InnerClass1();
+  } theInnerClass1;
+// CHECK1: metadata {{.*}}, metadata ![[DECL:[0-9]+]], metadata {{.*}}, i32 [[@LINE+5]]} ; [ DW_TAG_subprogram ] [line [[@LINE+5]]] [def] [Bar]
+  void Bar(const Foo1 *);
+};
+OuterClass1::InnerClass1 OuterClass1::theInnerClass1;
+// CHECK1: [[DECL]] = {{.*}} ; [ DW_TAG_subprogram ] [line [[@LINE-3]]] [private] [Bar]
+void OuterClass1::Bar(const Foo1 *meta) { }
+
+
+
+
+
+class Foo2;
+class OuterClass2
+{
+  static class InnerClass2 {
+  public:
+    InnerClass2();
+  } theInnerClass2;
+// CHECK2: [[DECL:[0-9]+]] = {{.*}} ; [ DW_TAG_subprogram ] [line [[@LINE+1]]] [private] [~OuterClass2]
+  ~OuterClass2(); // line 10
+};
+OuterClass2::InnerClass2 OuterClass2::theInnerClass2;
+// CHECK2: metadata {{.*}}, metadata ![[DECL]], metadata {{.*}}, i32 [[@LINE+1]]} ; [ DW_TAG_subprogram ] [line [[@LINE+1]]] [def] [~OuterClass2]
+OuterClass2::~OuterClass2() { }