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Unified Diff: test/mjsunit/compiler/instanceof-opt3.js

Issue 2537763002: [turbofan] Also optimize instanceof with bound functions. (Closed)
Patch Set: Created 4 years, 1 month ago
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Index: test/mjsunit/compiler/instanceof-opt3.js
diff --git a/test/mjsunit/compiler/instanceof-opt3.js b/test/mjsunit/compiler/instanceof-opt3.js
new file mode 100644
index 0000000000000000000000000000000000000000..3317d8acf4d2b203b7bf9565a0143cc8abaa54fb
--- /dev/null
+++ b/test/mjsunit/compiler/instanceof-opt3.js
@@ -0,0 +1,17 @@
+// Copyright 2016 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 Bar() {}
+var Foo = Bar.bind(null);
+
+// TurboFan will optimize this to false via constant-folding the
+// OrdinaryHasInstance call inside Function.prototype[@@hasInstance].
+function foo() { return 1 instanceof Foo; }
+
+assertEquals(false, foo());
+assertEquals(false, foo());
+%OptimizeFunctionOnNextCall(foo);
+assertEquals(false, foo());
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