Regressions on trunk at revision 151803 vs revision 151790

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gcc.dg/tls/alias-1.c (test for excess errors)
FAIL: gcc.dg/tls/diag-1.c (test for excess errors)
FAIL: gcc.dg/tls/diag-2.c (test for excess errors)
FAIL: gcc.dg/tls/diag-3.c (test for excess errors)
FAIL: gcc.dg/tls/diag-4.c (test for excess errors)
FAIL: gcc.dg/tls/diag-5.c (test for excess errors)
FAIL: gcc.dg/tls/diag-6.c (test for excess errors)
FAIL: gcc.dg/tls/init-1.c (test for excess errors)
FAIL: gcc.dg/tls/opt-11.c (test for excess errors)
FAIL: gcc.dg/tls/section-1.c (test for excess errors)
FAIL: gcc.dg/tls/trivial.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/20030920-1.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/alias-16.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/ifc-3.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/ivopts-1.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/pr15791-1.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/pr20739.c (test for excess errors)
FAIL: gcc.dg/weak/weak-6.c (test for excess errors)
FAIL: gcc.dg/weak/weak-6.c pointer conversion (test for errors, line 5)
FAIL: gcc.dg/weak/weak-7.c (test for excess errors)
FAIL: gcc.dg/weak/weak-7.c pointer conversion (test for errors, line 5)
FAIL: gcc.dg/weak/weak-8.c (test for excess errors)