1 files changed, 36 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/addvdi3.c b/contrib/compiler-rt/lib/addvdi3.c
new file mode 100644
index 000000000000..db45a27f0784
--- /dev/null
+++ b/contrib/compiler-rt/lib/addvdi3.c
@@ -0,0 +1,36 @@
+/* ===-- addvdi3.c - Implement __addvdi3 -----------------------------------===
+ *
+ *                     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 implements __addvdi3 for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+/* Returns: a + b */
+
+/* Effects: aborts if a + b overflows */
+
+COMPILER_RT_ABI di_int
+__addvdi3(di_int a, di_int b)
+{
+    di_int s = a + b;
+    if (b >= 0)
+    {
+        if (s < a)
+            compilerrt_abort();
+    }
+    else
+    {
+        if (s >= a)
+            compilerrt_abort();
+    }
+    return s;
+}