Regressions on trunk at revision 171590 vs revision 171573

[H.J. Lu ia32]

New failures:
FAIL: gcc.target/i386/avx256-unaligned-load-3.c scan-assembler \\*avx_movupd/1
FAIL: gcc.target/i386/avx256-unaligned-load-3.c scan-assembler vinsertf128
FAIL: gcc.target/i386/avx256-unaligned-store-3.c scan-assembler movupd.*\\*avx_movv2df_internal/3
FAIL: gcc.target/i386/avx256-unaligned-store-3.c scan-assembler vextractf128

New passes: