Cherry-picked: Fixes for initial memory pressure

test/mjsunit/compiler/lazy-iife-no-parens.js

 // Copyright 2015 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.
 
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 // comments to trigger lazy compilation comments to trigger lazy compilation
 
-'use strict';
-{
-  let x = function() {};
-  // Trigger OSR.
-  for (var i = 0; i < 1000000; i++);
+// Test that IIFEs are compilable even under lazy conditions where the enclosing
+// parentheses heuristic has not been triggered.
+
+function f() {
+  return function(){ return 0; }();
 }
+
+function g() {
+  function h() {
+    return function(){ return 0; }();
+  }
+  return h();
+}
+
+f();
+
+g();
+
+0, function(){}();
+
+(function(){ 0, function(){}(); })();
+
+0, function(){ (function(){ 0, function(){}(); })(); }();