Correct semantics for numerically indexed stores to typed arrays.

test/mjsunit/harmony/typedarrays.js

Index: test/mjsunit/harmony/typedarrays.js
diff --git a/test/mjsunit/harmony/typedarrays.js b/test/mjsunit/harmony/typedarrays.js
index 5b75874cd40685897393613ab693a521318eb828..af5672966dd649ce9a807405ea2abb42eff9d925 100644
--- a/test/mjsunit/harmony/typedarrays.js
+++ b/test/mjsunit/harmony/typedarrays.js
@@ -481,6 +481,36 @@ function TestTypedArraySet() {
 
 TestTypedArraySet();
 
+function TestTypedArraysWithIllegalIndices() {
+  var a = new Int32Array(100);
+
+  a[-10] = 10;
+  assertEquals(undefined, a[-10]);
+  a["-10"] = 10;
+  assertEquals(undefined, a["-10"]);
+
+  var s = "    -10";
+  a[s] = 10;
+  assertEquals(10, a[s]);
+  var s1 = "    -10   ";
+  a[s] = 10;
+  assertEquals(10, a[s]);
+
+  a["-1e2"] = 10;
+  assertEquals(10, a["-1e2"]);
+  assertEquals(undefined, a[-1e2]);
+
+  a[-Infinity] = 50;
+  assertEquals(undefined, a[-Infinity]);
+  a[1.5] = 10;
+  assertEquals(undefined, a[1.5]);
+  var nan = Math.sqrt(-1);
+  a[nan] = 5;
+  assertEquals(5, a[nan]);
+}
+
+TestTypedArraysWithIllegalIndices();
+
 // DataView
 function TestDataViewConstructor() {
   var ab = new ArrayBuffer(256);