Handle injected class names in the ASTImporter.

Every class as parsed by Clang has a forward declaration of itself as a member:

class A {
  class A;
  ...
}

but when the parser generates this it ensures that the RecordTypes for the two 
are the same.  This makes (among other things) inheritance work.  This patch
fixes a bug where the ASTImporter generated two separate RecordTypes when
importing the class and the contained forward declaration, and adds a test case.

Thanks to Doug Gregor for advice on this.

llvm-svn: 269551

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/test/ASTMerge/Inputs/inheritance-base.cpp b/clang/test/ASTMerge/Inputs/inheritance-base.cpp
new file mode 100644
index 00000000000..26fe42eb64d
--- /dev/null
+++ b/clang/test/ASTMerge/Inputs/inheritance-base.cpp
@@ -0,0 +1,7 @@
+class A
+{
+public:
+  int x;
+  A(int _x) : x(_x) {
+  }
+};