[turbofan] Optimize Function.prototype.bind for the common case.

test/mjsunit/compiler/function-bind.js

+// Copyright 2017 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
+
+(function() {
+  "use strict";
+  function bar() { return this; }
+
+  function foo(x) {
+    return bar.bind(x);
+  }
+
+  assertEquals(0, foo(0)());
+  assertEquals(1, foo(1)());
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals("", foo("")());
+})();
+
+(function() {
+  "use strict";
+  function bar(x) { return x; }
+
+  function foo(x) {
+    return bar.bind(undefined, x);
+  }
+
+  assertEquals(0, foo(0)());
+  assertEquals(1, foo(1)());
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals("", foo("")());
+})();
+
+(function() {
+  function bar(x) { return x; }
+
+  function foo(x) {
+    return bar.bind(undefined, x);
+  }
+
+  assertEquals(0, foo(0)());
+  assertEquals(1, foo(1)());
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals("", foo("")());
+})();
+
+(function() {
+  "use strict";
+  function bar(x, y) { return x + y; }
+
+  function foo(x, y) {
+    return bar.bind(undefined, x, y);
+  }
+
+  assertEquals(0, foo(0, 0)());
+  assertEquals(2, foo(1, 1)());
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals("ab", foo("a", "b")());
+  assertEquals(0, foo(0, 1).length);
+  assertEquals("bound bar", foo(1, 2).name)
+})();
+
+(function() {
+  function bar(x, y) { return x + y; }
+
+  function foo(x, y) {
+    return bar.bind(undefined, x, y);
+  }
+
+  assertEquals(0, foo(0, 0)());
+  assertEquals(2, foo(1, 1)());
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals("ab", foo("a", "b")());
+  assertEquals(0, foo(0, 1).length);
+  assertEquals("bound bar", foo(1, 2).name)
+})();