Don't use a float32list as storage for simd.

tests/lib/typed_data/int32x4_list_test.dart

Index: tests/lib/typed_data/int32x4_list_test.dart
diff --git a/tests/lib/typed_data/int32x4_list_test.dart b/tests/lib/typed_data/int32x4_list_test.dart
index 1ee42b6521db41551a90a42f4b0e1f7da8a28629..03f7a8f4df36af5788438a1c5333a09949d12a87 100644
--- a/tests/lib/typed_data/int32x4_list_test.dart
+++ b/tests/lib/typed_data/int32x4_list_test.dart
@@ -132,6 +132,55 @@ testSublist(array) {
   }
 }
 
+void testSpecialValues(array) {
+  var tests = [
+    [0x8901234567890, 0x34567890],
+    [0x89012A4567890, -1537836912],
+    [0x80000000, -2147483648],
+    [-0x80000000, -2147483648],
+    [0x7fffffff, 2147483647],
+    [-0x7fffffff, -2147483647],
+  ];
+  var int32x4;
+
+  for (var test in tests) {
+    var input = test[0];
+    var expected = test[1];
+
+    int32x4 = new Int32x4(input, 2, 3, 4);
+    array[0] = int32x4;
+    int32x4 = array[0];
+    Expect.equals(expected, int32x4.x);
+    Expect.equals(2, int32x4.y);
+    Expect.equals(3, int32x4.z);
+    Expect.equals(4, int32x4.w);
+
+    int32x4 = new Int32x4(1, input, 3, 4);
+    array[0] = int32x4;
+    int32x4 = array[0];
+    Expect.equals(1, int32x4.x);
+    Expect.equals(expected, int32x4.y);
+    Expect.equals(3, int32x4.z);
+    Expect.equals(4, int32x4.w);
+
+    int32x4 = new Int32x4(1, 2, input, 4);
+    array[0] = int32x4;
+    int32x4 = array[0];
+    Expect.equals(1, int32x4.x);
+    Expect.equals(2, int32x4.y);
+    Expect.equals(expected, int32x4.z);
+    Expect.equals(4, int32x4.w);
+
+    int32x4 = new Int32x4(1, 2, 3, input);
+    array[0] = int32x4;
+    int32x4 = array[0];
+    Expect.equals(1, int32x4.x);
+    Expect.equals(2, int32x4.y);
+    Expect.equals(3, int32x4.z);
+    Expect.equals(expected, int32x4.w);
+  }
+}
+
 main() {
   var list;
 
@@ -139,6 +188,9 @@ main() {
   for (int i = 0; i < 20; i++) {
     testLoadStore(list);
   }
+  for (int i = 0; i < 20; i++) {
+    testSpecialValues(list);
+  }
 
   Uint32List uint32List = new Uint32List(32);
   for (int i = 0; i < uint32List.length; i++) {
@@ -157,5 +209,8 @@ main() {
   for (int i = 0; i < 20; i++) {
     testListZero();
   }
+  for (int i = 0; i < 20; i++) {
+    testSpecialValues(list);
+  }
   testLoadStoreDeoptDriver();
 }