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deps/v8/test/mjsunit/turboshaft/maglev-frontend/write-const-glob.js

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+// 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
+
+glo4 = 4;
+
+function write_glo4(x) { glo4 = x }
+
+%PrepareFunctionForOptimization(write_glo4);
+write_glo4(4);
+assertEquals(4, glo4);
+
+// At this point, glo4 has cell type Constant.
+
+%OptimizeFunctionOnNextCall(write_glo4);
+write_glo4(4);
+assertEquals(4, glo4);
+assertOptimized(write_glo4);
+
+// Deopting when calling the function with an input that isn't 4.
+write_glo4(6);
+assertEquals(6, glo4);
+assertUnoptimized(write_glo4);