Smi immediates are not supported on x64. Do not use it.

test/mjsunit/regress/regress-358059.js

Index: test/mjsunit/regress/regress-358059.js
diff --git a/test/mjsunit/regress/regress-is-smi-repr.js b/test/mjsunit/regress/regress-358059.js
similarity index 56%
copy from test/mjsunit/regress/regress-is-smi-repr.js
copy to test/mjsunit/regress/regress-358059.js
index e9f2b516b57c630e4eddf8dac4da546a19ee08de..30738f9ae890b9a1e02e4ed9039d15b6101ecc08 100644
--- a/test/mjsunit/regress/regress-is-smi-repr.js
+++ b/test/mjsunit/regress/regress-358059.js
@@ -4,15 +4,10 @@
 
 // Flags: --allow-natives-syntax
 
-"use strict";
-
-var global;
-
-function g() { global = this; }
-Object.defineProperty(Number.prototype, "prop", { get: g });
-function f(s) { s.prop; }
-
-f(1);
-f(1);
+function f(a, b) { return b + (a.x++); }
+var o = {};
+o.__defineGetter__('x', function() { return 1; });
+assertEquals(4, f(o, 3));
+assertEquals(4, f(o, 3));
 %OptimizeFunctionOnNextCall(f);
-f(1);
+assertEquals(4, f(o, 3));