Regressions on trunk at revision 271557 vs revision 271536

[H.J. Lu (Intel64 -fpic -mcmodel=medium -mcmodel=large)]

New failures:
FAIL: gcc.dg/pr53265.c (test for excess errors)
FAIL: gcc.dg/pr53265.c (test for excess errors)
FAIL: gcc.dg/pr53265.c (test for excess errors)

New passes:
FAIL: gcc.dg/uninit-28-gimple.c  (test for bogus messages, line 9)
FAIL: gcc.dg/uninit-28-gimple.c  (test for bogus messages, line 9)
FAIL: gcc.dg/uninit-28-gimple.c  (test for bogus messages, line 9)