deps: update v8 to 4.4.63.9

Upgrade the bundled V8 and update code in src/ and lib/ to the new API.

Notable backwards incompatible changes are the removal of the smalloc
module and dropped support for CESU-8 decoding.  CESU-8 support can be
brought back if necessary by doing UTF-8 decoding ourselves.

This commit includes https://codereview.chromium.org/1192973004 to fix
a build error on python 2.6 systems.  The original commit log follows:

    Use optparse in js2c.py for python compatibility

    Without this change, V8 won't build on RHEL/CentOS 6 because the
    distro python is too old to know about the argparse module.

PR-URL: https://github.com/nodejs/io.js/pull/2022
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/deps/v8/src/compiler/raw-machine-assembler.cc b/deps/v8/src/compiler/raw-machine-assembler.cc
index 489c2ca6d9..6a339e7c91 100644
--- a/deps/v8/src/compiler/raw-machine-assembler.cc
+++ b/deps/v8/src/compiler/raw-machine-assembler.cc
@@ -101,7 +101,8 @@ void RawMachineAssembler::Switch(Node* index, Label* default_label,
 
 
 void RawMachineAssembler::Return(Node* value) {
-  schedule()->AddReturn(CurrentBlock(), value);
+  Node* ret = NewNode(common()->Return(), value);
+  schedule()->AddReturn(CurrentBlock(), ret);
   current_block_ = NULL;
 }
 
@@ -183,7 +184,9 @@ Node* RawMachineAssembler::MakeNode(const Operator* op, int input_count,
   Node* node = graph()->NewNode(op, input_count, inputs, incomplete);
   BasicBlock* block = op->opcode() == IrOpcode::kParameter ? schedule()->start()
                                                            : CurrentBlock();
-  schedule()->AddNode(block, node);
+  if (op->opcode() != IrOpcode::kReturn) {
+    schedule()->AddNode(block, node);
+  }
   return node;
 }