Revert of [compiler] Fix flipped boolean checks in marked tier-up

test/mjsunit/shared-function-tier-up-turbo.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: --mark-shared-functions-for-tier-up --allow-natives-syntax --ignition-staging --turbo
-
-(function() {
-  var sum = 0;
-  var i = 0;
-  for (var i = 0; i < 3; ++i) {
-    var f = function(x) {
-      return 2 * x;
-    }
-    sum += f(i);
-
-    if (%GetOptimizationStatus(f) == 3 || %GetOptimizationStatus(f) == 4) {
-      // If we are always or never optimizing f, just exit, this test is useless.
-      return;
-    }
-
-    if (i == 1) {
-      // f must be interpreted code.
-      assertEquals(8, %GetOptimizationStatus(f));
-
-      // Run twice (i = 0, 1), then tier-up.
-      %OptimizeFunctionOnNextCall(f);
-    } else if (i == 2) {
-      // Tier-up at i = 2 should go up to turbofan.
-      assertEquals(7, %GetOptimizationStatus(f));
-    }
-  }
-})()