1 files changed, 38 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/compiler/math-min.js b/deps/v8/test/mjsunit/compiler/math-min.js
new file mode 100644
index 0000000000..882103984d
--- /dev/null
+++ b/deps/v8/test/mjsunit/compiler/math-min.js
@@ -0,0 +1,38 @@
+// Copyright 2018 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
+
+// Test the case where TurboFan can statically rule out -0 from the
+// Math.min type.
+(function() {
+  function foo(x) {
+    // Arrange x such that TurboFan infers type [-inf, inf] \/ MinusZero.
+    x = +x;
+    x = Math.round(x);
+    return Object.is(-0, Math.min(-1, x))
+  }
+
+  assertFalse(foo(-0));
+  assertFalse(foo(-1));
+  %OptimizeFunctionOnNextCall(foo);
+  assertFalse(foo(-0));
+  assertFalse(foo(-1));
+})();
+
+// Test the case where +0 is ruled out because it's strictly greater than -0.
+(function() {
+  function foo(x) {
+    // Arrange x such that TurboFan infers type [-inf, inf] \/ MinusZero.
+    x = +x;
+    x = Math.round(x);
+    return Object.is(+0, Math.min(-0, x))
+  }
+
+  assertFalse(foo(-0));
+  assertFalse(foo(-1));
+  %OptimizeFunctionOnNextCall(foo);
+  assertFalse(foo(-0));
+  assertFalse(foo(-1));
+})();