Sema: support __declspec(dll*) on ObjC interfaces

Extend the __declspec(dll*) attribute to cover ObjC interfaces.  This was
requested by Microsoft for their ObjC support.  Cover both import and export.
This only adds the semantic analysis portion of the support, code-generation
still remains outstanding.  Add some basic initial documentation on the
attributes that were previously empty.  Tweak the previous tests to use the
relative expected-warnings to make the tests easier to read.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@275610 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/utils/TableGen/ClangAttrEmitter.cpp b/utils/TableGen/ClangAttrEmitter.cpp
index 1186d16ba2..50102af33a 100644
--- a/utils/TableGen/ClangAttrEmitter.cpp
+++ b/utils/TableGen/ClangAttrEmitter.cpp
@@ -2653,6 +2653,15 @@ static std::string CalculateDiagnostic(const Record &S) {
       return "(S.getLangOpts().CPlusPlus ? ExpectedFunctionVariableOrClass : "
                                            "ExpectedVariableOrFunction)";
 
+    case Func | Var | Class | ObjCInterface:
+      return "(S.getLangOpts().CPlusPlus"
+             "     ? ((S.getLangOpts().ObjC1 || S.getLangOpts().ObjC2)"
+             "            ? ExpectedFunctionVariableClassOrObjCInterface"
+             "            : ExpectedFunctionVariableOrClass)"
+             "     : ((S.getLangOpts().ObjC1 || S.getLangOpts().ObjC2)"
+             "            ? ExpectedFunctionVariableOrObjCInterface"
+             "            : ExpectedVariableOrFunction))";
+
     case ObjCMethod | ObjCProp: return "ExpectedMethodOrProperty";
     case ObjCProtocol | ObjCInterface:
       return "ExpectedObjectiveCInterfaceOrProtocol";