1 files changed, 60 insertions, 0 deletions
diff --git a/test/builtins/Unit/subvsi3_test.c b/test/builtins/Unit/subvsi3_test.c
new file mode 100644
index 000000000000..14e6ce193904
--- /dev/null
+++ b/test/builtins/Unit/subvsi3_test.c
@@ -0,0 +1,60 @@
+//===-- subvsi3_test.c - Test __subvsi3 -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __subvsi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+// Returns: a - b
+
+// Effects: aborts if a - b overflows
+
+si_int __subvsi3(si_int a, si_int b);
+
+int test__subvsi3(si_int a, si_int b)
+{
+    si_int x = __subvsi3(a, b);
+    si_int expected = a - b;
+    if (x != expected)
+        printf("error in test__subvsi3(0x%X, 0x%X) = %d, expected %d\n",
+               a, b, x, expected);
+    return x != expected;
+}
+
+int main()
+{
+//     test__subvsi3(0x80000000, 1);  // should abort
+//     test__subvsi3(0, 0x80000000);  // should abort
+//     test__subvsi3(1, 0x80000000);  // should abort
+//     test__subvsi3(0x7FFFFFFF, -1);  // should abort
+//     test__subvsi3(-2, 0x7FFFFFFF);  // should abort
+
+    if (test__subvsi3(0x80000000, -1))
+        return 1;
+    if (test__subvsi3(0x80000000, 0))
+        return 1;
+    if (test__subvsi3(-1, 0x80000000))
+        return 1;
+    if (test__subvsi3(0x7FFFFFFF, 1))
+        return 1;
+    if (test__subvsi3(0x7FFFFFFF, 0))
+        return 1;
+    if (test__subvsi3(1, 0x7FFFFFFF))
+        return 1;
+    if (test__subvsi3(0, 0x7FFFFFFF))
+        return 1;
+    if (test__subvsi3(-1, 0x7FFFFFFF))
+        return 1;
+
+    return 0;
+}