Regressions on trunk at revision 262850 vs revision 262764

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gcc.dg/tree-ssa/pr30375.c scan-tree-dump-times dse1 "MEM\\[\\(struct _s \\*\\)&signInfo \\+ [0-9]+B\\] = {}" 1
FAIL: gfortran.dg/dec_structure_23.f90   -O   (test for errors, line 16)
FAIL: gfortran.dg/dec_structure_23.f90   -O   (test for errors, line 17)
FAIL: gfortran.dg/dec_structure_23.f90   -O   (test for errors, line 18)
FAIL: gfortran.dg/dec_structure_23.f90   -O  (test for excess errors)