[turbofan] Support variable size argument popping in TF-generated functions

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index 161a33a10d4ac8663c2e57e81b99a737b8468cfc..edac12ad8360d99898c01c464277328308b81539 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -3777,7 +3777,8 @@ Node* AstGraphBuilder::BuildReturn(Node* return_value) {
     return_value =
         NewNode(javascript()->CallRuntime(Runtime::kTraceExit), return_value);
   }
-  Node* control = NewNode(common()->Return(), return_value);
+  Node* pop_node = graph()->NewNode(common()->Int32Constant(0));

[Michael Starzinger, 2016/10/28 14:12:14]

nit: Please use jsgraph()->Int32Constant(0) here. Direct calls to
graph()->NewNode() are dangerous.

[danno, 2016/10/31 10:06:39]

Done.

+  Node* control = NewNode(common()->Return(), pop_node, return_value);
   UpdateControlDependencyToLeaveFunction(control);
   return control;
 }