1 files changed, 34 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/c-c++-common/ubsan/overflow-sub-3.c b/gcc-4.9/gcc/testsuite/c-c++-common/ubsan/overflow-sub-3.c
new file mode 100644
index 000000000..deec5c411
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/c-c++-common/ubsan/overflow-sub-3.c
@@ -0,0 +1,34 @@
+/* { dg-do run } */
+/* { dg-options "-fsanitize=signed-integer-overflow" } */
+
+__attribute__((noinline, noclone)) int
+foo1 (int x, int y)
+{
+  return x - y;
+}
+
+__attribute__((noinline, noclone)) int
+foo2 (int x, int y)
+{
+  unsigned int xa = (unsigned int) x - (__INT_MAX__ - 3);
+  xa &= 3;
+  x = __INT_MAX__ - 3 + xa;
+  unsigned int ya = y + 1U;
+  ya &= 1;
+  y = ya - 1;
+  return x - y;
+}
+
+int
+main ()
+{
+  int xm1, y;
+  for (xm1 = __INT_MAX__ - 4; xm1 < __INT_MAX__; xm1++)
+    for (y = -1; y <= 0; y++)
+      if (foo1 (xm1 + 1, y) != (int) (xm1 + 1U - y)
+	  || foo2 (xm1 + 1, y) != (int) (xm1 + 1U - y))
+	__builtin_abort ();
+  return 0;
+}
+/* { dg-output ":7:\[0-9]\[^\n\r]*signed integer overflow: 2147483647 - -1 cannot be represented in type 'int'\[^\n\r]*(\n|\r\n|\r)" } */
+/* { dg-output "\[^\n\r]*:19:\[0-9]\[^\n\r]*signed integer overflow: 2147483647 - -1 cannot be represented in type 'int'" } */