Regressions on trunk at revision 255434 vs revision 255400

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gcc.target/i386/avx256-unaligned-store-1.c scan-assembler vmovups.*movv4sf_internal/4
FAIL: gcc.target/i386/avx256-unaligned-store-3.c scan-assembler vmovups.*movv2df_internal/4
FAIL: gcc.target/i386/avx256-unaligned-store-4.c scan-assembler vmovups.*movv8sf_internal/4
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-dbl.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1  -O2  (test for excess errors)
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/reduction-cplx-flt.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1  -O2  (test for excess errors)