[turbofan] In effect control linearizer, only delay effect phi update for loops.

test/mjsunit/compiler/regress-628403.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --allow-natives-syntax
 
-var a = [0, ""];
-a[0] = 0;
+var dothrow = false;
 
-function g(array) {
-  array[1] = undefined;
+function g() {
+  if (dothrow) throw 1;
 }
 
-function f() {
-  g(function() {});
-  g(a);
+function f(a) {
+  try {
+    g();
+  } catch(e) {
+    if (typeof e !== 'number' && e !== 1) throw e;
+    return a[0];
+  }
 }
 
+%NeverOptimizeFunction(g);
+f();
 f();
 %OptimizeFunctionOnNextCall(f);
-f();
+dothrow = true;
+assertEquals(42, f([42]));