Regressions on trunk at revision 175627 vs revision 175626

[H.J. Lu Intel64 Core 2/i7]

New failures:

New passes:
FAIL: g++.dg/cpp0x/constexpr-ptrmem.C (test for excess errors)
FAIL: g++.dg/cpp0x/constexpr-ptrmem.C (test for excess errors)
FAIL: g++.dg/tree-ssa/fwprop-align.C scan-tree-dump-times forwprop2 "& 1" 0
FAIL: g++.dg/tree-ssa/fwprop-align.C scan-tree-dump-times forwprop2 "& 1" 0
WARNING: program timed out.
WARNING: program timed out.