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deps/v8/test/mjsunit/turboshaft/maglev-frontend/call-spread.js

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+// Copyright 2024 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 --turbolev --turbofan
+
+function f(x, y, z) {
+  return x + y + z;
+}
+%NeverOptimizeFunction(f);
+let arr = [17, 13, 5, 23];
+
+function f_spread(arr) {
+  return f(...arr);
+}
+
+%PrepareFunctionForOptimization(f_spread);
+assertEquals(35, f_spread(arr));
+%OptimizeFunctionOnNextCall(f_spread);
+assertEquals(35, f_spread(arr));
+assertOptimized(f_spread);
+
+let small_arr = [3, 5];
+assertEquals(NaN, f_spread(small_arr));
+assertOptimized(f_spread);