Fairly large "cleaup" related to changing ObjCCompatibleAliasDecl superclass (to inherit from NamedDecl, instead of ScopedDecl). 

- Added a DenseMap to associate an IdentifierInfo with the ObjCCompatibleAliasDecl.
- Renamed LookupScopedDecl->LookupDecl and changed it's return type to Decl. Also added lookup for ObjCCompatibleAliasDecl's.
- Removed Sema::LookupInterfaceDecl(). Converted clients to used LookupDecl().
- Some minor indentation changes.

Will deal with ObjCInterfaceDecl and getObjCInterfaceDecl() in a separate commit...



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49058 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprObjC.cpp b/lib/Sema/SemaExprObjC.cpp
index 1a274e1..00a1318 100644
--- a/lib/Sema/SemaExprObjC.cpp
+++ b/lib/Sema/SemaExprObjC.cpp
@@ -52,8 +52,8 @@
     // Initialize the constant string interface lazily. This assumes
     // the NSConstantString interface is seen in this translation unit.
     IdentifierInfo *NSIdent = &Context.Idents.get("NSConstantString");
-    ScopedDecl *IFace = LookupScopedDecl(NSIdent, Decl::IDNS_Ordinary, 
-                                         SourceLocation(), TUScope);
+    Decl *IFace = LookupDecl(NSIdent, Decl::IDNS_Ordinary, 
+                             SourceLocation(), TUScope);
     ObjCInterfaceDecl *strIFace = dyn_cast_or_null<ObjCInterfaceDecl>(IFace);
     if (!strIFace)
       return Diag(S->getLocStart(), diag::err_undef_interface,