1 files changed, 16 insertions, 0 deletions
diff --git a/test/ubsan/TestCases/Integer/incdec-overflow.cpp b/test/ubsan/TestCases/Integer/incdec-overflow.cpp
new file mode 100644
index 000000000000..fc7141c803d8
--- /dev/null
+++ b/test/ubsan/TestCases/Integer/incdec-overflow.cpp
@@ -0,0 +1,16 @@
+// RUN: %clangxx -DOP=n++ -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx -DOP=++n -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx -DOP=m-- -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx -DOP=--m -fsanitize=signed-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck %s
+
+#include <stdint.h>
+
+int main() {
+  int n = 0x7ffffffd;
+  n++;
+  n++;
+  int m = -n - 1;
+  // CHECK: incdec-overflow.cpp:15:3: runtime error: signed integer overflow: [[MINUS:-?]]214748364
+  // CHECK: + [[MINUS]]1 cannot be represented in type 'int'
+  OP;
+}