Regressions on trunk at revision 221074 vs revision 221053

[H.J. Lu Intel64 Core i7]

New failures:

New passes:
FAIL: gcc.dg/ipa/ipa-cp-1.c scan-ipa-dump cp "Alignment 2"
FAIL: gcc.dg/ipa/ipa-cp-1.c scan-ipa-dump cp "Alignment 2"
FAIL: gcc.dg/ipa/ipa-cp-2.c scan-ipa-dump cp "Alignment 8, misalignment 4"
FAIL: gcc.dg/ipa/ipa-cp-2.c scan-ipa-dump cp "Alignment 8, misalignment 4"
FAIL: gcc.dg/tree-ssa/ssa-dom-thread-9.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/ssa-dom-thread-9.c (test for excess errors)