Ensure expected behavior for transition hosting tests by flushing ICs

test/mjsunit/elements-transition-hoisting.js

 // Copyright 2011 the V8 project authors. All rights reserved.

[Jakob Kummerow, 2012/02/09 14:31:32]

nit: 2012

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-// Flags: --allow-natives-syntax --smi-only-arrays
+// Flags: --allow-natives-syntax --smi-only-arrays --expose-gc
 
 // Ensure that ElementsKind transitions in various situations are hoisted (or
 // not hoisted) correctly, don't change the semantics programs and don't trigger
 // deopt through hoisting in important situations.
 
 support_smi_only_arrays = %HasFastSmiOnlyElements(new Array(1,2,3,4,5,6));
 
 if (support_smi_only_arrays) {
   print("Tests include smi-only arrays.");
 } else {
   print("Tests do NOT include smi-only arrays.");
 }
 
+// Force existing ICs from previous stress runs to be flushed, otherwise the
+// assumptions in this test about when deoptimizations get triggered are not
+// valid.
+gc();
+
 if (support_smi_only_arrays) {
   // Make sure that a simple elements array transitions inside a loop before
   // stores to an array gets hoisted in a way that doesn't generate a deopt in
   // simple cases.}
   function testDoubleConversion4(a) {
     var object = new Object();
     a[0] = 0;
     var count = 3;
     do {
       a[0] = object;
@@ skipping 107 matching lines @@
       a[0] = object;
     } while (--count > 3);
   }
 
   testHoistingWithSideEffect(new Array(5));
   %OptimizeFunctionOnNextCall(testHoistingWithSideEffect);
   testHoistingWithSideEffect(new Array(5));
   testHoistingWithSideEffect(new Array(5));
   assertTrue(2 != %GetOptimizationStatus(testHoistingWithSideEffect));
 }