Test mjsunit/allocation-site-info is flaky without explicit gc()

test/mjsunit/allocation-site-info.js

Index: test/mjsunit/allocation-site-info.js
diff --git a/test/mjsunit/allocation-site-info.js b/test/mjsunit/allocation-site-info.js
index 35b60ee266f0ab27cbffff27a51f880d717ecdcc..0545754aa3c2aa8de15d48f8837270feb954af80 100644
--- a/test/mjsunit/allocation-site-info.js
+++ b/test/mjsunit/allocation-site-info.js
@@ -414,6 +414,11 @@ if (support_smi_only_arrays) {
    assertKind(elements_kind.fast, obj[1][0]);
   })();
 
+  // Perform a gc because without it the test below can experience an
+  // allocation failure at an inconvenient point. Allocation mementos get
+  // cleared on gc, and they can't deliver elements kind feedback when that
+  // happens.
+  gc();
 
   // Make sure object literals with array fields benefit from the type feedback
   // that allocation mementos provide.