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-rw-r--r--lib/ubsan/lit_tests/TestCases/Integer/incdec-overflow.cpp16
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/ubsan/lit_tests/TestCases/Integer/incdec-overflow.cpp b/lib/ubsan/lit_tests/TestCases/Integer/incdec-overflow.cpp
new file mode 100644
index 000000000000..904250a76c79
--- /dev/null
+++ b/lib/ubsan/lit_tests/TestCases/Integer/incdec-overflow.cpp
@@ -0,0 +1,16 @@
+// RUN: %clangxx -DOP=n++ -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx -DOP=++n -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx -DOP=m-- -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx -DOP=--m -fsanitize=signed-integer-overflow %s -o %t && %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;
+}