Regressions on trunk at revision 184213 vs revision 184181

[H.J. Lu ia32]

New failures:
ERROR: gcc.dg/lower-subreg-1.c: syntax error in target selector "target  { ! mips64 } && { ! ia64-*-* }  &&  ! spu-*-*  &&  ! tilegx-*-*" for " dg-do 1 compile { target { { { ! mips64 } && { ! ia64-*-* } } && { ! spu-*-* } && { ! tilegx-*-* } } } "

New passes:
FAIL: 20_util/shared_ptr/cons/43820_neg.cc  (test for errors, line 773)
FAIL: 20_util/shared_ptr/cons/43820_neg.cc  (test for errors, line 867)
FAIL: 20_util/shared_ptr/cons/43820_neg.cc (test for excess errors)
FAIL: tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc  (test for errors, line 565)
FAIL: tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc  (test for errors, line 604)
FAIL: tr1/2_general_utilities/shared_ptr/cons/43820_neg.cc (test for excess errors)