Go patch committed: Track //go:nointerface in export data

Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE	(revision 257527)
+++ gcc/go/gofrontend/MERGE	(working copy)
@@ -1,4 +1,4 @@ 
-7e94bac5676afc8188677c98ecb263c78c1a7f8d
+89105404f94005ffa8e2b08df78015dc9ac91362
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: gcc/go/gofrontend/gogo.cc
===================================================================
--- gcc/go/gofrontend/gogo.cc	(revision 257527)
+++ gcc/go/gofrontend/gogo.cc	(working copy)
@@ -5189,17 +5189,24 @@  Function::defer_stack(Location location)
 void
 Function::export_func(Export* exp, const std::string& name) const
 {
-  Function::export_func_with_type(exp, name, this->type_);
+  Function::export_func_with_type(exp, name, this->type_,
+				  this->is_method() && this->nointerface());
 }
 
 // Export a function with a type.
 
 void
 Function::export_func_with_type(Export* exp, const std::string& name,
-				const Function_type* fntype)
+				const Function_type* fntype, bool nointerface)
 {
   exp->write_c_string("func ");
 
+  if (nointerface)
+    {
+      go_assert(fntype->is_method());
+      exp->write_c_string("/*nointerface*/ ");
+    }
+
   if (fntype->is_method())
     {
       exp->write_c_string("(");
@@ -5280,10 +5287,21 @@  Function::import_func(Import* imp, std::
 		      Typed_identifier** preceiver,
 		      Typed_identifier_list** pparameters,
 		      Typed_identifier_list** presults,
-		      bool* is_varargs)
+		      bool* is_varargs,
+		      bool* nointerface)
 {
   imp->require_c_string("func ");
 
+  *nointerface = false;
+  if (imp->match_c_string("/*"))
+    {
+      imp->require_c_string("/*nointerface*/ ");
+      *nointerface = true;
+
+      // Only a method can be nointerface.
+      go_assert(imp->peek_char() == '(');
+    }
+
   *preceiver = NULL;
   if (imp->peek_char() == '(')
     {
@@ -6213,6 +6231,32 @@  Bindings_snapshot::check_goto_defs(Locat
 
 // Class Function_declaration.
 
+// Whether this declares a method.
+
+bool
+Function_declaration::is_method() const
+{
+  return this->fntype_->is_method();
+}
+
+// Whether this method should not be included in the type descriptor.
+
+bool
+Function_declaration::nointerface() const
+{
+  go_assert(this->is_method());
+  return (this->pragmas_ & GOPRAGMA_NOINTERFACE) != 0;
+}
+
+// Record that this method should not be included in the type
+// descriptor.
+
+void
+Function_declaration::set_nointerface()
+{
+  this->pragmas_ |= GOPRAGMA_NOINTERFACE;
+}
+
 // Return the function descriptor.
 
 Expression*
Index: gcc/go/gofrontend/gogo.h
===================================================================
--- gcc/go/gofrontend/gogo.h	(revision 257527)
+++ gcc/go/gofrontend/gogo.h	(working copy)
@@ -1476,13 +1476,14 @@  class Function
   // Export a function with a type.
   static void
   export_func_with_type(Export*, const std::string& name,
-			const Function_type*);
+			const Function_type*, bool nointerface);
 
   // Import a function.
   static void
   import_func(Import*, std::string* pname, Typed_identifier** receiver,
 	      Typed_identifier_list** pparameters,
-	      Typed_identifier_list** presults, bool* is_varargs);
+	      Typed_identifier_list** presults, bool* is_varargs,
+	      bool* nointerface);
 
  private:
   // Type for mapping from label names to Label objects.
@@ -1607,6 +1608,10 @@  class Function_declaration
   location() const
   { return this->location_; }
 
+  // Return whether this function declaration is a method.
+  bool
+  is_method() const;
+
   const std::string&
   asm_name() const
   { return this->asm_name_; }
@@ -1628,6 +1633,16 @@  class Function_declaration
     this->pragmas_ = pragmas;
   }
 
+  // Whether this method should not be included in the type
+  // descriptor.
+  bool
+  nointerface() const;
+
+  // Record that this method should not be included in the type
+  // descriptor.
+  void
+  set_nointerface();
+
   // Return an expression for the function descriptor, given the named
   // object for this function.  This may only be called for functions
   // without a closure.  This will be an immutable struct with one
@@ -1652,7 +1667,10 @@  class Function_declaration
   // Export a function declaration.
   void
   export_func(Export* exp, const std::string& name) const
-  { Function::export_func_with_type(exp, name, this->fntype_); }
+  {
+    Function::export_func_with_type(exp, name, this->fntype_,
+				    this->is_method() && this->nointerface());
+  }
 
   // Check that the types used in this declaration's signature are defined.
   void
Index: gcc/go/gofrontend/import.cc
===================================================================
--- gcc/go/gofrontend/import.cc	(revision 257527)
+++ gcc/go/gofrontend/import.cc	(working copy)
@@ -607,8 +607,9 @@  Import::import_func(Package* package)
   Typed_identifier_list* parameters;
   Typed_identifier_list* results;
   bool is_varargs;
+  bool nointerface;
   Function::import_func(this, &name, &receiver,
-			&parameters, &results, &is_varargs);
+			&parameters, &results, &is_varargs, &nointerface);
   Function_type *fntype = Type::make_function_type(receiver, parameters,
 						   results, this->location_);
   if (is_varargs)
@@ -648,6 +649,10 @@  Import::import_func(Package* package)
       if (this->add_to_globals_)
 	this->gogo_->add_dot_import_object(no);
     }
+
+  if (nointerface)
+    no->func_declaration_value()->set_nointerface();
+
   return no;
 }
 
Index: gcc/go/gofrontend/types.cc
===================================================================
--- gcc/go/gofrontend/types.cc	(revision 257527)
+++ gcc/go/gofrontend/types.cc	(working copy)
@@ -9742,7 +9742,12 @@  bool
 Named_method::do_nointerface() const
 {
   Named_object* no = this->named_object_;
-  return no->is_function() && no->func_value()->nointerface();
+  if (no->is_function())
+    return no->func_value()->nointerface();
+  else if (no->is_function_declaration())
+    return no->func_declaration_value()->nointerface();
+  else
+    go_unreachable();
 }
 
 // Class Interface_method.