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deps/v8/test/mjsunit/regress/regress-v8-12194.js

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+// Copyright 2021 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 --turbofan --no-always-turbofan
+// Flags: --deopt-every-n-times=0 --no-force-slow-path
+
+(function TestSliceWithoutParams() {
+  let array = [0, 1, 2];
+
+  function f() {
+    let array2 = array.slice();
+    array2[1] = array2[0];
+  }
+
+  %PrepareFunctionForOptimization(f);
+  f();
+  %OptimizeFunctionOnNextCall(f);
+  f();
+
+  // Assert that the function was not deoptimized.
+  assertOptimized(f);
+})();
+
+(function TestSliceWithStartZero() {
+  let array = [0, 1, 2];
+
+  function f() {
+    let array2 = array.slice(0);
+    array2[1] = array2[0];
+  }
+
+  %PrepareFunctionForOptimization(f);
+  f();
+  %OptimizeFunctionOnNextCall(f);
+  f();
+
+  // Assert that the function was not deoptimized.
+  assertOptimized(f);
+})();
+
+(function TestSliceWithStartNonZero() {
+  let array = [0, 1, 2];
+
+  function f() {
+    let array2 = array.slice(1);
+    array2[1] = array2[0];
+  }
+
+  %PrepareFunctionForOptimization(f);
+  f();
+  %OptimizeFunctionOnNextCall(f);
+  f();
+
+  // Assert that the function was not deoptimized.
+  assertOptimized(f);
+})();
+
+(function TestSliceWithStartZeroEndNonUndefined() {
+  let array = [0, 1, 2];
+
+  function f() {
+    let array2 = array.slice(0, 1);
+    array2[1] = array2[0];
+  }
+
+  %PrepareFunctionForOptimization(f);
+  f();
+  %OptimizeFunctionOnNextCall(f);
+  f();
+
+  // Assert that the function was not deoptimized.
+  assertOptimized(f);
+})();