Regressions on master at commit r13-6433 vs commit r13-6422 on Linux/x86_64

[H.J. Lu]

New failures:

New passes:
FAIL: gcc.dg/memchr-3.c  target llp64  (test for warnings, line 9)
FAIL: gcc.dg/memchr-3.c  target llp64  (test for warnings, line 9)
FAIL: gcc.dg/memchr-3.c  target llp64  (test for warnings, line 9)