Upload Kmake

deps/v8/test/mjsunit/compiler/regress-772420.js

@@ -0,0 +1,29 @@
+// Copyright 2017 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: --allow-natives-syntax
+
+function foo(arg) {
+  var value;
+  // None of the branches of this switch are ever taken, but
+  // the sequence means value could be the hole.
+  switch (arg) {
+    case 1:
+      let let_var = 1;
+    case 2:
+      value = let_var;
+  }
+  // Speculative number binop with NumberOrOddball feedback.
+  // Shouldn't be optimized to pure operator since value's phi
+  // could theoretically be the hole (we would have already thrown a
+  // reference error in case 2 above if so, but TF typing still
+  // thinks it could be the hole).
+  return value * undefined;
+}
+
+%PrepareFunctionForOptimization(foo);
+foo(3);
+foo(3);
+%OptimizeFunctionOnNextCall(foo);
+foo(3);