Reland of [ignition/turbo] Perform liveness analysis on the bytecodes

test/debugger/debug/regress-5207.js

 // Copyright 2012 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: --noanalyze-environment-liveness
 
 
 'use strict';
 var Debug = debug.Debug;
 var exception = null;
 
 function listener(event, exec_state, event_data, data) {
   if (event != Debug.DebugEvent.Break) return;
   try {
     var scopes = exec_state.frame(0).allScopes();
     assertEquals(debug.ScopeType.Eval, scopes[0].scopeType());
     assertEquals(1, scopes[0].scopeObject().value().a);
     assertEquals(debug.ScopeType.Script, scopes[1].scopeType());
     assertEquals(undefined, scopes[1].scopeObject().value().a);
     assertEquals(debug.ScopeType.Global, scopes[2].scopeType());
     assertEquals(undefined, scopes[2].scopeObject().value().a);
   } catch (e) {
     exception = e;
   }
 }
 
 Debug.setListener(listener);
 // Eval inherits strict mode.
 eval("var a = 1; debugger;");
 Debug.setListener(null);
 assertNull(exception);