Regressions on trunk at revision 256779 vs revision 256776

[H.J. Lu x32]

New failures:

New passes:
FAIL: c-c++-common/Wrestrict.c  -std=gnu++11 memcpy (test for warnings, line 761)
FAIL: c-c++-common/Wrestrict.c  -std=gnu++14 memcpy (test for warnings, line 761)
FAIL: c-c++-common/Wrestrict.c  -std=gnu++98 memcpy (test for warnings, line 761)
FAIL: c-c++-common/Wrestrict.c  -Wc++-compat  memcpy (test for warnings, line 761)