Upload Kmake

deps/v8/test/mjsunit/regress/regress-1230597.js

@@ -0,0 +1,35 @@
+// 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
+
+function main() {
+  // This seems to just be some register setup for the benefit of the optimising
+  // compiler.
+  for(var i=0; i<2; i++) {
+    if(i==1) { }
+    with ({}) {
+      try {
+        var07().foo = 1;
+      } catch { }
+    }
+  }
+
+  // This is where the bug was.
+  try {
+    // The `var10() = ...` is rewritten to `var10[throw ReferenceError] = ...`,
+    // making the value of the assign dead. However, there is a loop inside the
+    // spread that used to accidentally resurrect that block.
+    //
+    // This broke checks in the optimizing compiler since the iterator setup was
+    // dead but the iterator use inside the spread's loop was live.
+    var10() = var08(1, ...foo, 2);
+  } catch { }
+}
+
+
+%PrepareFunctionForOptimization(main);
+main();
+%OptimizeFunctionOnNextCall(main);
+main();