1 files changed, 16 insertions, 0 deletions
diff --git a/test/ubsan/TestCases/Integer/uincdec-overflow.cpp b/test/ubsan/TestCases/Integer/uincdec-overflow.cpp
new file mode 100644
index 000000000000..a236d21fcf1f
--- /dev/null
+++ b/test/ubsan/TestCases/Integer/uincdec-overflow.cpp
@@ -0,0 +1,16 @@
+// RUN: %clangxx -DOP=n++ -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck --check-prefix=CHECK-INC %s
+// RUN: %clangxx -DOP=++n -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck --check-prefix=CHECK-INC %s
+// RUN: %clangxx -DOP=m-- -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck --check-prefix=CHECK-DEC %s
+// RUN: %clangxx -DOP=--m -fsanitize=unsigned-integer-overflow %s -o %t && %run %t 2>&1 | FileCheck --check-prefix=CHECK-DEC %s
+
+#include <stdint.h>
+
+int main() {
+  unsigned n = 0xfffffffd;
+  n++;
+  n++;
+  unsigned m = 0;
+  // CHECK-INC: uincdec-overflow.cpp:15:3: runtime error: unsigned integer overflow: 4294967295 + 1 cannot be represented in type 'unsigned int'
+  // CHECK-DEC: uincdec-overflow.cpp:15:3: runtime error: unsigned integer overflow: 0 - 1 cannot be represented in type 'unsigned int'
+  OP;
+}