[Bug tree-optimization/109184] [10/11/12/13 Regression] csmith: 2017 bug with -floop-interchange

["rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109184

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with -O2 -floop-interchange.  There's just a single interchange done:

runData/keep/in.713.c:648:32: optimized: loops interchanged in loop nest

that's in func_2 for the nest

        for (g_149 = 0; (g_149 > (-15)); g_149--)
        {
            for (l_1719 = 4; (l_1719 >= 1); l_1719 -= 1)
            {
                for (l_1721 = 0; (l_1721 >= 0); l_1721 -= 1)
                {
                    struct S1 l_1935 = {0x13186D76L,0xC9L,36,24,1L,0x87L};
                    for (g_1179 = 0; (g_1179 <= 4); g_1179 += 1)
                    {
                        int32_t l_1942 = (-3L);
                        int32_t *****l_1947 = &l_1946[0][6];
                        int i, j;
                        l_1942 ^= ((safe_add_func_uint64_t_u_u((l_1935 ,
(((l_1936[1] != (void*)0) < (*g_511)) & (g_1731[(l_1719 + 1)][l_1721] &=
(((0x943C8AB0L | 0xE398A931L) != g_20) , (0x26L &
(safe_add_func_uint64_t_u_u((--l_1930[g_1179]), 0xFC07342370A5FE25LL))))))),
4L)) <= p_5.f0);
                        l_1943[0][1][1]++;
                        l_1949 = (((*l_1947) = l_1946[0][6]) == g_1948);
                    }
                }
            }
        }