[turbofan] fix wrong materialization of arguments object

test/mjsunit/arguments-deopt.js

Index: test/mjsunit/arguments-deopt.js
diff --git a/test/mjsunit/arguments-deopt.js b/test/mjsunit/arguments-deopt.js
new file mode 100644
index 0000000000000000000000000000000000000000..0cf3c0455cbe228284152ffc1b63aa19b8ab9859
--- /dev/null
+++ b/test/mjsunit/arguments-deopt.js
@@ -0,0 +1,90 @@
+// 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 --turbo
+
+(function MaterializeStrictArguments() {
+  "use strict"
+
+  function f(x, y) {
+    return x + y;
+  }
+
+  function test() {
+    %DeoptimizeNow();
+    return f.apply(null, arguments);
+  }
+
+  assertEquals(test(1, 2), 3);
+  assertEquals(test(1, 2, 3), 3);
+
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(test(1, 2), 3);
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(test(1, 2, 3), 3);
+})();
+
+(function MaterializeSloppyArguments() {
+  function f(x, y) {
+    return x + y;
+  }
+
+  function test() {
+    %DeoptimizeNow();
+    return f.apply(null, arguments);
+  }
+
+  assertEquals(test(1, 2), 3);
+  assertEquals(test(1, 2, 3), 3);
+
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(test(1, 2), 3);
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(test(1, 2, 3), 3);
+})();
+
+(function MaterializeStrictOverwrittenArguments() {
+  "use strict"
+
+  function f(x, y) {
+    return x + y;
+  }
+
+  function test(a, b) {
+    a = 4;
+    %DeoptimizeNow();
+    return f.apply(null, arguments);
+  }
+
+  assertEquals(test(1, 2), 3);
+  assertEquals(test(1, 2, 3), 3);
+
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(test(1, 2), 3);
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(test(1, 2, 3), 3);
+})();
+
+(function MaterializeSloppyOverwrittenArguments() {
+  function f(x, y) {
+    return x + y;
+  }
+
+  function test(a, b) {
+    a = 4;
+    %DeoptimizeNow();
+    return f.apply(null, arguments);
+  }
+
+  test(1, 2);
+  test(3, 4, 5);
+
+  assertEquals(test(1, 2), 6);
+  assertEquals(test(1, 2, 3), 6);
+
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(test(1, 2), 6);
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(test(1, 2, 3), 6);
+})();