Regressions on trunk at revision 180625 vs revision 180623

[H.J. Lu x32]

New failures:

New passes:
FAIL: gcc.target/i386/avx2-vpsrlvd128-1.c scan-assembler vpsrlvd[ \\t]+[^\n]*%xmm[0-9]
FAIL: gcc.target/i386/avx2-vpsrlvd128-2.c (test for excess errors)
FAIL: gcc.target/i386/avx2-vpsrlvd256-1.c scan-assembler vpsrlvd[ \\t]+[^\n]*%ymm[0-9]
FAIL: gcc.target/i386/avx2-vpsrlvd256-2.c (test for excess errors)
FAIL: gcc.target/i386/avx2-vpsrlvq128-1.c scan-assembler vpsrlvq[ \\t]+[^\n]*%xmm[0-9]
FAIL: gcc.target/i386/avx2-vpsrlvq128-2.c (test for excess errors)
FAIL: gcc.target/i386/avx2-vpsrlvq256-1.c scan-assembler vpsrlvq[ \\t]+[^\n]*%ymm[0-9]
FAIL: gcc.target/i386/avx2-vpsrlvq256-2.c (test for excess errors)
FAIL: gcc.target/i386/avx2-vshift-1.c (test for excess errors)