tests/stress/tricky-array-bounds-checks.js

   1 function foo(a, i, p) {
   2     if (p || !DFGTrue())
   3         return [DFGTrue(), a[(i - (DFGTrue() ? 2147483646 : 0)) | 0], a[i], a[(i + (DFGTrue() ? 2147483646 : 0)) | 0], DFGTrue()];
   4     return [12];
   5 }
   6
   7 noInline(foo);
   8
   9 function arraycmp(a, b) {
  10     if (a.length != b.length)
  11         return false;
  12     for (var i = 0; i < a.length; ++i) {
  13         if (a[i] != b[i])
  14             return false;
  15     }
  16     return true;
  17 }
  18
  19 for (var i = 0; i < 100000; ++i) {
  20     var result = foo([42], 0, false);
  21     if (!arraycmp(result, [false, 42, 42, 42, false]) && !arraycmp(result, [12]))
  22         throw "Error: bad result for i = " + i + ": " + result;
  23 }
  24
  25 var result = foo([1, 2, 3, 4, 5], -2147483646, true);
  26 if (!arraycmp(result, [true, 5, void 0, void 0, false])
  27     && !arraycmp(result, [false, void 0, void 0, void 0, false]))
  28     throw "Error: bad result for trick: " + result;