AllocationSites: when updating allocation site transition information,

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 b8b1076ff9f11450f18f6821c4514b63df9a5d6c..442d108928eaad02e911ca60871c03642233d81f 100644
--- a/test/mjsunit/allocation-site-info.js
+++ b/test/mjsunit/allocation-site-info.js
@@ -282,6 +282,32 @@ if (support_smi_only_arrays) {
   obj = newarraycase_list_smiobj(2);
   assertKind(elements_kind.fast, obj);
 
+  // Case: array constructor calls with out of date feedback.
+  // The boilerplate should incorporate all feedback, but the input array
+  // should be minimally transitioned based on immediate need.
+  (function() {
+    function foo(i) {
+      // We have two cases, one for literals one for constructed arrays.
+      var a = (i == 0)
+        ? [1, 2, 3]
+        : new Array(1, 2, 3);
+      return a;
+    }
+
+    for (i = 0; i < 2; i++) {
+      a = foo(i);
+      b = foo(i);
+      b[5] = 1;  // boilerplate goes holey
+      assertHoley(foo(i));
+      a[0] = 3.5;  // boilerplate goes holey double
+      assertKind(elements_kind.fast_double, a);
+      assertNotHoley(a);
+      c = foo(i);
+      assertKind(elements_kind.fast_double, c);
+      assertHoley(c);
+    }
+  })();
+
   function newarraycase_onearg(len, value) {
     var a = new Array(len);
     a[0] = value;