Imported Upstream version 1.0.0.9127upstream/1.0.0.9127

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/src/JIT/Regression/JitBlue/GitHub_8460/GitHub_8460.cs b/tests/src/JIT/Regression/JitBlue/GitHub_8460/GitHub_8460.cs
new file mode 100644
index 0000000000..f5c9aa281b
--- /dev/null
+++ b/tests/src/JIT/Regression/JitBlue/GitHub_8460/GitHub_8460.cs
@@ -0,0 +1,38 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+
+namespace bug
+{
+    class Program
+    {
+        static int Pass = 100;
+        static int Fail = -1;
+
+        // This test is meant to check that in case of
+        // GT_EQ/NE(shift, 0), JIT doesn't optimize out
+        // 'test' instruction incorrectly, because shift
+        // operations on xarch don't modify flags if the
+        // shift count is zero.
+        static int Main(string[] args)
+        {
+            // Absolute bits
+            int bitCount = 0;
+            while ((0 != (100 >> bitCount)) && (31 > bitCount))
+            {
+                bitCount++;
+            }
+            // Sign bit
+            bitCount++;
+
+            if (bitCount != 8)
+            {
+                return Fail;
+            }
+
+            return Pass;
+        }
+    }
+}