[tests] Cleanup tests that use assertOptimized()/assertUnoptimized().

test/mjsunit/elements-transition-hoisting.js

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 // Flags: --allow-natives-syntax
-// Flags: --nostress-opt
+// Flags: --nostress-opt --crankshaft
 
 // 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.
 
 function test_wrapper() {
   // 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) {
@@ skipping 187 matching lines @@
   testStraightLineDupeElinination(new Array(5),0,0,0,0,0);
   testStraightLineDupeElinination(new Array(5),0,0,0,0,0);
   assertOptimized(testStraightLineDupeElinination);
   %ClearFunctionTypeFeedback(testStraightLineDupeElinination);
 }
 
 // The test is called in a test wrapper that has type feedback cleared to
 // prevent the influence of allocation-sites, which learn from transitions.
 test_wrapper();
 %ClearFunctionTypeFeedback(test_wrapper);