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

src/compiler/bytecode-graph-builder.cc

Index: src/compiler/bytecode-graph-builder.cc
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index 93a2971ed16837801609c32d5dbed6aee2bc28bd..841010893262a610365c6ce1ae05fb23d51b1039 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -1727,8 +1727,9 @@ void BytecodeGraphBuilder::VisitStackCheck() {
 
 void BytecodeGraphBuilder::VisitReturn() {
   BuildLoopExitsForFunctionExit();
+  Node* pop_node = graph()->NewNode(common()->Int32Constant(0));

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

nit: Likewise, please use jsgraph()->Int32Constant(0) here.

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

Done.

   Node* control =
-      NewNode(common()->Return(), environment()->LookupAccumulator());
+      NewNode(common()->Return(), pop_node, environment()->LookupAccumulator());
   MergeControlToLeaveFunction(control);
 }