Regressions on trunk at revision 172580 vs revision 172535

[H.J. Lu Intel64]

New failures:
FAIL: gcc.dg/guality/vla-1.c  -O2 -flto -flto-partition=none  line 17 sizeof (a) == 6
FAIL: gcc.target/i386/avx256-unaligned-load-3.c scan-assembler \\*sse2_movupd/1
FAIL: gcc.target/i386/avx256-unaligned-load-3.c scan-assembler \\*sse2_movupd/1
FAIL: gcc.target/i386/avx256-unaligned-store-3.c scan-assembler vmovupd.*\\*movv2df_internal/3
FAIL: gcc.target/i386/avx256-unaligned-store-3.c scan-assembler vmovupd.*\\*movv2df_internal/3

New passes:
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 \\*avx_movupd/1
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 movupd.*\\*avx_movv2df_internal/3