compiler: add types used by inline functions to export data

Change-Id: I68226e55e03d89a76ecb077c7791d9e21baa20b3
Reviewed-on: https://go-review.googlesource.com/c/150069
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
diff --git a/go/export.cc b/go/export.cc
index fde2403..d021ac4 100644
--- a/go/export.cc
+++ b/go/export.cc
@@ -290,6 +290,11 @@
   if (type->is_void_type())
     return TRAVERSE_SKIP_COMPONENTS;
 
+  // Skip abstract types.  We should never see these in real code,
+  // only in things like const declarations.
+  if (type->is_abstract())
+    return TRAVERSE_SKIP_COMPONENTS;
+
   if (!this->exp_->set_type_index(type))
     {
       // We've already seen this type.
@@ -367,7 +372,12 @@
 	     methods->begin_definitions();
 	   pm != methods->end_definitions();
 	   ++pm)
-	this->traverse_function((*pm)->func_value()->type());
+	{
+	  Function* fn = (*pm)->func_value();
+	  this->traverse_function(fn->type());
+	  if (fn->export_for_inlining())
+	    fn->block()->traverse(this);
+	}
 
       for (Bindings::const_declarations_iterator pm =
 	     methods->begin_declarations();
@@ -434,7 +444,12 @@
 	  break;
 
 	case Named_object::NAMED_OBJECT_FUNC:
-	  find.traverse_function(no->func_value()->type());
+	  {
+	    Function* fn = no->func_value();
+	    find.traverse_function(fn->type());
+	    if (fn->export_for_inlining())
+	      fn->block()->traverse(&find);
+	  }
 	  break;
 
 	case Named_object::NAMED_OBJECT_FUNC_DECLARATION: