Upload Kmake

deps/v8/test/mjsunit/compiler/regress-crbug-1479847.js

@@ -0,0 +1,22 @@
+// Copyright 2023 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 --turboshaft --turboshaft-verify-reductions
+
+function f() {
+  // By allocating an array and storing into it, we delay the constant folding
+  // of `arr[0] * arr[1]` to the backend. The corresponding
+  // OverflowCheckedBinopOp should thus reach Turboshaft's
+  // MachineOptimizationReducer with 2 constant inputs, leading to a reduction
+  // that replaces it with a Tuple.
+  let arr = [0, 0];
+  arr[0] = 42
+  arr[1] = 27;
+  return arr[0] * arr[1];
+}
+
+%PrepareFunctionForOptimization(f);
+print(f());
+%OptimizeFunctionOnNextCall(f);
+print(f());