Upload Kmake

deps/v8/test/mjsunit/turboshaft/maglev-frontend/unreachable-catch.js

@@ -0,0 +1,32 @@
+// 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 f0() {
+  for (let i = 0; i < 1; i++) {
+    // We're not actually collecting enough feedback for this, which means that
+    // Maglev will insert an unconditional Deopt in the loop. However, because
+    // this is within a loop, Maglev won't see that the code that follows the
+    // loop is actually unreachable. Still, Maglev won't emit the backedge,
+    // which means that from Turboshaft's point of vue, we won't have a loop but
+    // just a "regular" unconditional Deopt, and Turboshaft thus won't even try
+    // to emit anything past this loop.
+    class C5 { }
+    C5.g = C5;
+  }
+  try { f0.not_defined(); }
+  catch (e) {
+    // This catch block is entered when we try to call `f0.not_defined()`.
+    // However, because of the unconditional deopt above, it won't be directly
+    // reachable from Turboshaft.
+    return 42;
+  }
+  return 17;
+}
+
+%PrepareFunctionForOptimization(f0);
+assertEquals(42, f0());
+%OptimizeFunctionOnNextCall(f0);
+assertEquals(42, f0());