Add support for deprecated members of RecordDecls (e.g. struct fields).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64634 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Lex/Preprocessor.cpp

@@ -462,8 +462,6 @@ static void InitializePredefinedMacros(Preprocessor &PP,
   
   // Initialize language-specific preprocessor defines.
   
-  // FIXME: Implement magic like cpp_init_builtins for things like __STDC__
-  // and __DATE__ etc.
   // These should all be defined in the preprocessor according to the
   // current language configuration.
   if (!PP.getLangOptions().Microsoft)

lib/Sema/SemaExpr.cpp

@@ -1593,6 +1593,9 @@ Sema::ActOnMemberReferenceExpr(Scope *S, ExprArg Base, SourceLocation OpLoc,
     if (MemberDecl->isInvalidDecl())
       return ExprError();
     
+    // Check if referencing a field with __attribute__((deprecated)).
+    DiagnoseUseOfDeprecatedDecl(MemberDecl, MemberLoc);
+
     if (FieldDecl *FD = dyn_cast<FieldDecl>(MemberDecl)) {
       // We may have found a field within an anonymous union or struct
       // (C++ [class.union]).

test/Sema/attr-deprecated.c

@@ -32,3 +32,11 @@ int old_fn() {
   return old_fn()+1;  // no warning, deprecated functions can use deprecated symbols.
 }
 
+
+struct foo {
+  int x __attribute__((deprecated));
+};
+
+void test1(struct foo *F) {
+  ++F->x;  // expected-warning {{'x' is deprecated}}
+}