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      1 // Copyright 2015 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Flags: --allow-natives-syntax --use-osr --turbo-osr
      6 
      7 "use strict";
      8 
      9 function nest(body, name, depth) {
     10   var header = "";
     11   for (var i = 0; i < depth; i++) {
     12     var x = "x" + (i + 1);
     13     header += "  for(var " + x + " = 0; " + x + " < 2; " + x + " = " + x + " + 1 | 0) {\n";
     14     body = body + "}"
     15   }
     16 
     17   return body.replace(new RegExp("function " + name + "\\(\\) {"),
     18                       "function " + name + "_" + x + "() {\n" + header);
     19 }
     20 
     21 function test(expected, func, depth) {
     22   assertEquals(expected, func());
     23   assertEquals(expected, func());
     24   assertEquals(expected, func());
     25 
     26   var orig = func.toString();
     27   var name = func.name;
     28   for (var depth = 1; depth < 4; depth++) {
     29     var body = nest(orig, name, depth);
     30     func = eval("(" + body + ")");
     31 
     32     assertEquals(expected, func());
     33     assertEquals(expected, func());
     34     assertEquals(expected, func());
     35   }
     36 }
     37 
     38 function foo() {
     39   var result;
     40   {
     41     let sum = 0;
     42     for (var i = 0; i < 10; i++) {
     43       %OptimizeOsr();
     44       sum += i;
     45     }
     46     result = sum;
     47   }
     48   return result;
     49 }
     50 
     51 test(45, foo);
     52 
     53 function bar() {
     54   let sum = 0;
     55   for (var i = 0; i < 10; i++) {
     56     %OptimizeOsr();
     57     sum += i;
     58   }
     59   return sum;
     60 }
     61 
     62 test(45, bar);
     63 
     64 function bon() {
     65   {
     66     let sum = 0;
     67     for (var i = 0; i < 10; i++) {
     68       if (i == 5) %OptimizeOsr();
     69       sum += i;
     70     }
     71     return sum;
     72   }
     73 }
     74 
     75 test(45, bon);
     76 
     77 function row() {
     78   var i = 0;
     79   {
     80     let sum = 0;
     81     while (true) {
     82       if (i == 8) return sum;
     83       %OptimizeOsr();
     84       sum = i;
     85       i = i + 1 | 0;
     86     }
     87   }
     88   return 11;
     89 }
     90 
     91 test(7, row);
     92 
     93 function nub() {
     94   let i = 0;
     95   while (i < 2) {
     96     %OptimizeOsr();
     97     i++;
     98   }
     99   return i;
    100 }
    101 
    102 test(2, nub);
    103 
    104 function kub() {
    105   var result = 0;
    106   let i = 0;
    107   while (i < 2) {
    108     let x = i;
    109     %OptimizeOsr();
    110     i++;
    111     result = x;
    112   }
    113   return result;
    114 }
    115 
    116 test(1, kub);
    117