--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr67089-7.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,62 @@
+/* PR target/67089 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-loop-if-convert -fdump-tree-widening_mul" } */
+
+extern void abort (void);
+
+int cnt, d;
+void foo (int x);
+
+#define T(n, type, op, cond) \
+__attribute__((noinline, noclone))	\
+type					\
+f##n (type x, type y)			\
+{					\
+  type r = op;				\
+  cond;					\
+  return r;				\
+}
+
+T (1, unsigned int, x - y, if (r >= x) foo (0))
+T (2, unsigned long, x - y, if (r < x) foo (0))
+T (3, unsigned short, x - y, if (x <= r) foo (r))
+T (4, unsigned long long, x - y, if (d || x > r) foo (0))
+T (5, unsigned int, x - y, if (d || r >= x) foo (0))
+T (6, unsigned long, x - y, if (d || r < x) foo (0))
+T (7, unsigned short, x - y, if (d || x <= r) foo (0))
+T (8, unsigned long long, x - y, if (d || x > r) foo (0))
+T (9, unsigned int, x - y, if (r > y) foo (0))
+T (10, unsigned long, x - y, if (r <= y) foo (0))
+T (11, unsigned short, x - y, if (y < r) foo (r))
+T (12, unsigned long long, x - y, if (y >= r) foo (0))
+T (13, unsigned int, x - y, if (r >= y) foo (0))
+T (14, unsigned long, x - y, if (r < y) foo (0))
+T (15, unsigned short, x - y, if (y <= r) foo (r))
+T (16, unsigned long long, x - y, if (d || y > r) foo (0))
+T (17, unsigned int, x - y, if (d || r > y) foo (0))
+T (18, unsigned long, x - y, if (d || r <= y) foo (0))
+T (19, unsigned char, x - y, if (d || y < r) foo (0))
+T (20, unsigned long long, x - y, if (d || y >= r) foo (0))
+T (21, unsigned int, x - y, if (d || r >= y) foo (0))
+T (22, unsigned long, x - y, if (d || r < y) foo (0))
+T (23, unsigned short, x - y, if (d || y <= r) foo (0))
+T (24, unsigned long long, x - y, if (d || y > r) foo (0))
+T (25, unsigned int, x + y, if (r > x) foo (0))
+T (26, unsigned long, x + y, if (r <= x) foo (0))
+T (27, unsigned short, x + y, if (x < r) foo (r))
+T (28, unsigned long long, x + y, if (x >= r) foo (0))
+T (29, unsigned int, x + y, if (d || r > x) foo (0))
+T (30, unsigned long, x + y, if (d || r <= x) foo (0))
+T (31, unsigned char, x + y, if (d || x < r) foo (0))
+T (32, unsigned long long, x + y, if (d || x >= r) foo (0))
+T (33, unsigned int, x + y, if (r > y) foo (0))
+T (34, unsigned long, x + y, if (r <= y) foo (0))
+T (35, unsigned short, x + y, if (y < r) foo (r))
+T (36, unsigned long long, x + y, if (y >= r) foo (0))
+T (37, unsigned int, x + y, if (d || r > y) foo (0))
+T (38, unsigned long, x + y, if (d || r <= y) foo (0))
+T (39, unsigned char, x + y, if (d || y < r) foo (0))
+T (40, unsigned long long, x + y, if (d || y >= r) foo (0))
+
+/* { dg-final { scan-tree-dump-not "ADD_OVERFLOW" "widening_mul" } } */
+/* { dg-final { scan-tree-dump-not "SUB_OVERFLOW" "widening_mul" } } */