Regressions on lto at revision 148235 vs revision 148159

[H.J. Lu Intel64]

New failures:
FAIL: 27_io/basic_filebuf/underflow/wchar_t/9178.cc execution test
FAIL: 27_io/basic_filebuf/underflow/wchar_t/9178.cc execution test
FAIL: gcc.dg/vect/no-section-anchors-vect-66.c scan-tree-dump-times vect "Alignment of access forced using peeling" 1
FAIL: gcc.dg/vect/no-section-anchors-vect-66.c scan-tree-dump-times vect "Alignment of access forced using peeling" 1
FAIL: gcc.dg/vect/no-section-anchors-vect-66.c scan-tree-dump-times vect "Vectorizing an unaligned access" 0
FAIL: gcc.dg/vect/no-section-anchors-vect-66.c scan-tree-dump-times vect "Vectorizing an unaligned access" 0
FAIL: gcc.dg/vect/pr25413.c scan-tree-dump-times vect "not vectorized: unsupported unaligned store" 1
FAIL: gcc.dg/vect/pr25413.c scan-tree-dump-times vect "vector alignment may not be reachable" 1
FAIL: gcc.dg/vect/pr25413.c scan-tree-dump-times vect "vectorized 1 loops" 0
FAIL: gcc.dg/vect/vect-58.c scan-tree-dump-times vect "Alignment of access forced using peeling" 1
FAIL: gcc.dg/vect/vect-58.c scan-tree-dump-times vect "Alignment of access forced using peeling" 1
FAIL: gcc.dg/vect/vect-58.c scan-tree-dump-times vect "Vectorizing an unaligned access" 0
FAIL: gcc.dg/vect/vect-58.c scan-tree-dump-times vect "Vectorizing an unaligned access" 0
FAIL: gcc.dg/vect/vect-88.c scan-tree-dump-times vect "Alignment of access forced using peeling" 1
FAIL: gcc.dg/vect/vect-88.c scan-tree-dump-times vect "Alignment of access forced using peeling" 1
FAIL: gcc.dg/vect/vect-88.c scan-tree-dump-times vect "Vectorizing an unaligned access" 0
FAIL: gcc.dg/vect/vect-88.c scan-tree-dump-times vect "Vectorizing an unaligned access" 0
ERROR: (DejaGnu) proc "libgomp_target_compile lto5568.c lto5568.exe executable {{additional_flags=-O0 -flto}}" does not exist.

New passes:
FAIL: ext/throw_allocator/check_deallocate_null.cc execution test
FAIL: ext/throw_allocator/check_deallocate_null.cc execution test
ERROR: (DejaGnu) proc "libgomp_target_compile lto24435.c lto24435.exe executable {{additional_flags=-O0 -flto}}" does not exist.