Fix "Hole" leak in TryBuildConsolidatedElementLoad

test/mjsunit/regress/consolidated-holey-load.js

Index: test/mjsunit/regress/consolidated-holey-load.js
diff --git a/test/mjsunit/constant-compare-nil-value.js b/test/mjsunit/regress/consolidated-holey-load.js
similarity index 83%
copy from test/mjsunit/constant-compare-nil-value.js
copy to test/mjsunit/regress/consolidated-holey-load.js
index 9f5b2adb063abc0c7920d8dee30edb7ee6eb1ff9..ef8f1ef14007440f370b724a2acaa6a974179302 100644
--- a/test/mjsunit/constant-compare-nil-value.js
+++ b/test/mjsunit/regress/consolidated-holey-load.js
@@ -27,16 +27,14 @@
 
 // Flags: --allow-natives-syntax
 
-function inlined() {
-    return 1;
+function foo(array) {
+  return array[0];
 }
 
-function foo() {
-    if ((inlined() + 0.5) == null) return "null";
-    return "non-null";
-}
-
-assertEquals("non-null", foo());
-assertEquals("non-null", foo());
+var a = [1, 2, , 4];  // Holey Smi elements.
+var b = ["abcd", 0];  // Fast elements.
+foo(b);  // Observe fast elements first, or the IC will transition without
+foo(a);  // going polymorphic.
 %OptimizeFunctionOnNextCall(foo);
-assertEquals("non-null", foo());
+var c = [, 0];
+assertEquals(undefined, foo(c));  // Elided hole check will leak the hole.