[turbofan] Fix usage of ThisFunction parameter in OSR.

test/mjsunit/compiler/osr-regex-id.js

+// Copyright 2015 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 --use-osr --turbo-osr
+
+function id(f) { return f; }
+
+function foo(a) {
+  var r = /\0/;
+  for (var i = 0; i < 10; i++) {
+    if (a) %OptimizeFunctionOnNextCall(foo, "osr");
+  }
+  return r;
+}
+
+function bar(a) {
+  for (var i = 0; i < 10; i++) {
+    if (a) %OptimizeFunctionOnNextCall(bar, "osr");
+    var r = /\0/;
+  }
+  return r;
+}
+
+function baz(a) {
+  for (var i = 0; i < 10; i++) {
+    if (a) %OptimizeFunctionOnNextCall(baz, "osr");
+  }
+  return /\0/;
+}
+
+function qux(a) {
+  for (var i = 0; i < 10; i++) {
+    if (i > 5 && a) {
+      %OptimizeFunctionOnNextCall(qux, "osr");
+    } else {
+      var r = /\0/;
+    }
+  }
+  return r;
+}
+
+function test(f) {
+  // Test the reference equality of regex's created in OSR'd function.
+  var x = f(false);
+  assertEquals(x, f(true));
+  assertEquals(x, f(true));
+  assertEquals(x, f(true));
+}
+
+test(foo);
+test(bar);
+test(baz);
+test(qux);