Regressions on trunk at revision 186604 vs revision 186586

[H.J. Lu Intel64]

New failures:
FAIL: 25_algorithms/stable_partition/mem_check.cc execution test
FAIL: 25_algorithms/stable_partition/mem_check.cc execution test
FAIL: 25_algorithms/stable_sort/mem_check.cc execution test
FAIL: 25_algorithms/stable_sort/mem_check.cc execution test

New passes:
FAIL: gcc.dg/tree-ssa/vrp54.c scan-tree-dump-not vrp1 "link_error"
FAIL: gcc.dg/tree-ssa/vrp54.c scan-tree-dump-not vrp1 "link_error"
FAIL: gcc.target/i386/pr45830.c scan-tree-dump switchconv "Expanding as bit test is preferable"
FAIL: gcc.target/i386/pr45830.c scan-tree-dump switchconv "Expanding as bit test is preferable"