deps: upgrade V8 to 5.0.71.32

* Pick up the branch head for V8 5.0 stable [1]
* Edit v8 gitignore to allow trace_event copy
* Update V8 DEP trace_event as per deps/v8/DEPS [2]

[1] https://chromium.googlesource.com/v8/v8.git/+/3c67831
[2] https://chromium.googlesource.com/chromium/src/base/trace_event/common/+/4b09207e447ae5bd34643b4c6321bee7b76d35f9

Ref: https://github.com/nodejs/node/pull/5945
PR-URL: https://github.com/nodejs/node/pull/6111
Reviewed-By: targos - Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: indutny - Fedor Indutny <fedor.indutny@gmail.com>

1 files changed, 107 insertions, 0 deletions

diff --git a/deps/v8/test/mjsunit/es6/tail-call-simple.js b/deps/v8/test/mjsunit/es6/tail-call-simple.js
new file mode 100644
index 0000000000..d2890b0212
--- /dev/null
+++ b/deps/v8/test/mjsunit/es6/tail-call-simple.js
@@ -0,0 +1,107 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --harmony-tailcalls --stack-size=100
+
+//
+// Tail calls work only in strict mode.
+//
+(function() {
+  function f(n) {
+    if (n <= 0) {
+      return  "foo";
+    }
+    return f(n - 1);
+  }
+  assertThrows(()=>{ f(1e5) });
+  %OptimizeFunctionOnNextCall(f);
+  assertThrows(()=>{ f(1e5) });
+})();
+
+
+//
+// Tail call normal functions.
+//
+(function() {
+  "use strict";
+  function f(n) {
+    if (n <= 0) {
+      return  "foo";
+    }
+    return f(n - 1);
+  }
+  assertEquals("foo", f(1e5));
+  %OptimizeFunctionOnNextCall(f);
+  assertEquals("foo", f(1e5));
+})();
+
+
+(function() {
+  "use strict";
+  function f(n){
+    if (n <= 0) {
+      return "foo";
+    }
+    return g(n - 1);
+  }
+  function g(n){
+    if (n <= 0) {
+      return "bar";
+    }
+    return f(n - 1);
+  }
+  assertEquals("foo", f(1e5));
+  assertEquals("bar", f(1e5 + 1));
+  %OptimizeFunctionOnNextCall(f);
+  assertEquals("foo", f(1e5));
+  assertEquals("bar", f(1e5 + 1));
+})();
+
+
+//
+// Tail call bound functions.
+//
+(function() {
+  "use strict";
+  function f0(n) {
+    if (n <= 0) {
+      return "foo";
+    }
+    return f_bound(n - 1);
+  }
+  var f_bound = f0.bind({});
+  function f(n) {
+    return f_bound(n);
+  }
+  assertEquals("foo", f(1e5));
+  %OptimizeFunctionOnNextCall(f);
+  assertEquals("foo", f(1e5));
+})();
+
+
+(function() {
+  "use strict";
+  function f0(n){
+    if (n <= 0) {
+      return "foo";
+    }
+    return g_bound(n - 1);
+  }
+  function g0(n){
+    if (n <= 0) {
+      return "bar";
+    }
+    return f_bound(n - 1);
+  }
+  var f_bound = f0.bind({});
+  var g_bound = g0.bind({});
+  function f(n) {
+    return f_bound(n);
+  }
+  assertEquals("foo", f(1e5));
+  assertEquals("bar", f(1e5 + 1));
+  %OptimizeFunctionOnNextCall(f);
+  assertEquals("foo", f(1e5));
+  assertEquals("bar", f(1e5 + 1));
+})();