Don't use a float32list as storage for simd.

tests/lib/typed_data/float32x4_list_test.dart

Index: tests/lib/typed_data/float32x4_list_test.dart
diff --git a/tests/lib/typed_data/float32x4_list_test.dart b/tests/lib/typed_data/float32x4_list_test.dart
index 8942186cf631d0b7ef72fb87f2a72a470efa369e..d0207098c9c81de47dca32237d8e3cb139614e85 100644
--- a/tests/lib/typed_data/float32x4_list_test.dart
+++ b/tests/lib/typed_data/float32x4_list_test.dart
@@ -132,6 +132,98 @@ testSublist(array) {
   }
 }
 
+void testSpecialValues(array) {
+
+  /// Same as Expect.identical, but also works with NaNs and -0.0 for dart2js.
+  void checkEquals(expected, actual) {
+    if (expected.isNaN) {
+      Expect.isTrue(actual.isNaN);
+    } else if (expected == 0.0 && expected.isNegative) {
+      Expect.isTrue(actual == 0.0 && actual.isNegative);
+    } else {
+      Expect.equals(expected, actual);
+    }
+  }
+
+  var pairs =  [
+    [0.0, 0.0],
+    [5e-324, 0.0],
+    [2.225073858507201e-308, 0.0],
+    [2.2250738585072014e-308, 0.0],
+    [0.9999999999999999, 1.0],
+    [1.0, 1.0],
+    [1.0000000000000002, 1.0],
+    [4294967295.0, 4294967296.0],
+    [4294967296.0, 4294967296.0],
+    [4503599627370495.5, 4503599627370496.0],
+    [9007199254740992.0, 9007199254740992.0],
+    [1.7976931348623157e+308, double.INFINITY],
+    [0.49999999999999994, 0.5],
+    [4503599627370497.0, 4503599627370496.0],
+    [9007199254740991.0, 9007199254740992.0],
+    [double.INFINITY, double.INFINITY],
+    [double.NAN, double.NAN],
+  ];
+
+  var conserved = [
+    1.401298464324817e-45,
+    1.1754942106924411e-38,
+    1.1754943508222875e-38,
+    0.9999999403953552,
+    1.0000001192092896,
+    8388607.5,
+    8388608.0,
+    3.4028234663852886e+38,
+    8388609.0,
+    16777215.0,
+  ];
+
+  var minusPairs = pairs.map((pair) {
+    return [-pair[0], -pair[1]];
+  });
+  var conservedPairs = conserved.map((value) => [value, value]);
+
+  var allTests = [pairs, minusPairs, conservedPairs].expand((x) => x);
+
+  for (var pair in allTests) {
+    var input = pair[0];
+    var expected = pair[1];
+    var f;
+    f = new Float32x4(input, 2.0, 3.0, 4.0);
+    array[0] = f;
+    f = array[0];
+    checkEquals(expected, f.x);
+    Expect.equals(2.0, f.y);
+    Expect.equals(3.0, f.z);
+    Expect.equals(4.0, f.w);
+
+    f = new Float32x4(1.0, input, 3.0, 4.0);
+    array[1] = f;
+    f = array[1];
+    Expect.equals(1.0, f.x);
+    checkEquals(expected, f.y);
+    Expect.equals(3.0, f.z);
+    Expect.equals(4.0, f.w);
+
+    f = new Float32x4(1.0, 2.0, input, 4.0);
+    array[2] = f;
+    f = array[2];
+    Expect.equals(1.0, f.x);
+    Expect.equals(2.0, f.y);
+    checkEquals(expected, f.z);
+    Expect.equals(4.0, f.w);
+
+    f = new Float32x4(1.0, 2.0, 3.0, input);
+    array[3] = f;
+    f = array[3];
+    Expect.equals(1.0, f.x);
+    Expect.equals(2.0, f.y);
+    Expect.equals(3.0, f.z);
+    checkEquals(expected, f.w);
+  }
+}
+
+
 main() {
   var list;
 
@@ -157,5 +249,8 @@ main() {
   for (int i = 0; i < 20; i++) {
     testListZero();
   }
+  for (int i = 0; i < 20; i++) {
+    testSpecialValues(list);
+  }
   testLoadStoreDeoptDriver();
 }