Regressions on trunk at revision 231476 vs revision 231470

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: g++.dg/guality/pr55665.C   -O2  line 23 p == 40
FAIL: g++.dg/guality/pr55665.C   -O2  line 23 p == 40
FAIL: g++.dg/guality/pr55665.C   -O3 -g  line 23 p == 40
FAIL: g++.dg/guality/pr55665.C   -O3 -g  line 23 p == 40

New passes:
FAIL: gcc.dg/tree-ssa/leaf.c scan-tree-dump-times optimized "return 9" 1
FAIL: gcc.dg/tree-ssa/leaf.c scan-tree-dump-times optimized "return 9" 1