tests/stress/branch-may-exit-due-to-object-or-other-use-kind.js

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  25
  26 // Regression test for https://bugs.webkit.org/show_bug.cgi?id=144152
  27
  28 // The bug in 144152 needs 3 conditions to manifest:
  29 // 1. The branch test value in the inlined function is of useKind ObjectOrOtherUse.
  30 // 2. The branch test value is proven to be a known useKind.
  31 // 3. The masqueradesAsUndefined watchpoint is no longer valid.
  32 // With the bug fixed, this test should not crash on debug builds.
  33
  34 function inlinedFunction(x) {
  35     if (x) // Conditional branch that will assert on a debug build if the bug is present.
  36         new Object;
  37 }
  38
  39 function foo(x) {
  40     if (x) // Testing x before calling the inlined function sets up condition 2.
  41         inlinedFunction(x);
  42 }
  43
  44 makeMasquerader(); // Invalidates the masqueradesAsUndefined watchpoint for condition 3.
  45 for (var i = 0; i < 10000; i++)
  46     foo({}); // Pass an object argument to set up condition 1.