Fix arm64 deoptimization of double registers (reverts r20613).

test/mjsunit/regress/regress-381313.js

Index: test/mjsunit/regress/regress-381313.js
diff --git a/test/mjsunit/regress/regress-381313.js b/test/mjsunit/regress/regress-381313.js
new file mode 100644
index 0000000000000000000000000000000000000000..d2b9d7c11d3c12e77ce45169e3b271d402c3ad7e
--- /dev/null
+++ b/test/mjsunit/regress/regress-381313.js
@@ -0,0 +1,42 @@
+// Copyright 2014 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
+
+var g = 0;
+
+function f(x, deopt) {
+  var a0 = x;
+  var a1 = 2 * x;
+  var a2 = 3 * x;
+  var a3 = 4 * x;
+  var a4 = 5 * x;
+  var a5 = 6 * x;
+  var a6 = 7 * x;
+  var a7 = 8 * x;
+  var a8 = 9 * x;
+  var a9 = 10 * x;
+  var a10 = 11 * x;
+  var a11 = 12 * x;
+  var a12 = 13 * x;
+  var a13 = 14 * x;
+  var a14 = 15 * x;
+  var a15 = 16 * x;
+  var a16 = 17 * x;
+  var a17 = 18 * x;
+  var a18 = 19 * x;
+  var a19 = 20 * x;
+
+  g = 1;
+
+  deopt + 0;
+
+  return a0 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 +
+         a10 + a11 + a12 + a13 + a14 + a15 + a16 + a17 + a18 + a19;
+}
+
+f(0.5, 0);
+f(0.5, 0);
+%OptimizeFunctionOnNextCall(f);
+print(f(0.5, ""));