Reapply change to GVN all HFieldGet instructions.

tests/language/gvn_test.dart

Index: tests/language/gvn_test.dart
diff --git a/tests/compiler/dart2js_extra/named_parameter_test.dart b/tests/language/gvn_test.dart
similarity index 61%
copy from tests/compiler/dart2js_extra/named_parameter_test.dart
copy to tests/language/gvn_test.dart
index 3e2da8b8e302dd90129603ee152c04d3e9e45e7c..b4859bf6d253f7806a775f0c2218c5be50df437c 100644
--- a/tests/compiler/dart2js_extra/named_parameter_test.dart
+++ b/tests/language/gvn_test.dart
@@ -3,14 +3,19 @@
 // BSD-style license that can be found in the LICENSE file.
 
 class A {
-  foo([a, b]) {
-    Expect.equals(0, a);
-    Expect.equals(1, b);
+  int x = 0;
+
+  foo(i) {
+    var start = x;
+    do {
+      x++;
+      i++;
+    } while (i != 10);
   }
 }
 
 main() {
-  A a = new A();
-  a.foo(a: 0, b: 1);
-  a.foo(b: 1, a: 0);
+  var a = new A();
+  a.foo(0);
+  Expect.equals(10, a.x);
 }