Upload Kmake

deps/v8/test/mjsunit/turboshaft/maglev-frontend/to-number.js

@@ -0,0 +1,21 @@
+// 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
+// Flags: --no-always-turbofan
+
+function check_number(x) {
+  // With only number maps in the feedback, "+x" is a no-op and Maglev just
+  // emits a CheckNumber.
+  return +x;
+}
+
+%PrepareFunctionForOptimization(check_number);
+assertEquals(3.65, check_number(3.65));
+%OptimizeFunctionOnNextCall(check_number);
+assertEquals(3.65, check_number(3.65));
+assertOptimized(check_number);
+// CheckNumber should trigger a deopt for non-number maps (like strings).
+assertEquals(NaN, check_number("abc"));
+assertUnoptimized(check_number);