Upload Kmake

deps/v8/test/mjsunit/maglev/regress/regress-1383712.js

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+// Copyright 2022 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Flags: --maglev --allow-natives-syntax
+
+// Pseudo-side-effecting function.
+function bar() {}
+%NeverOptimizeFunction(bar);
+
+function foo(i) {
+  // First load checks for HeapNumber map, allowing through Smis.
+  i['oh'];
+  // Cause side-effects to clear known maps of i.
+  bar(i);
+  // Second load should not crash for Smis.
+  i['no'];
+}
+
+%PrepareFunctionForOptimization(foo);
+// Give the two loads polymorphic feedback in HeapNumber and {some object}.
+foo({});
+foo(1);
+%OptimizeMaglevOnNextCall(foo);
+// Pass a Smi to loads with a HeapNumber map-check.
+foo(2);