Regressions on trunk at revision 229567 vs revision 229518

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gcc.target/i386/avx2-gather-4.c (internal compiler error)
FAIL: gcc.target/i386/avx2-gather-4.c (test for excess errors)
FAIL: gcc.target/i386/avx2-vect-shift.c (internal compiler error)
FAIL: gcc.target/i386/avx2-vect-shift.c (test for excess errors)
FAIL: gcc.target/i386/pr51235.c (internal compiler error)
FAIL: gcc.target/i386/pr51235.c (test for excess errors)
FAIL: gcc.target/i386/pr58137.c (internal compiler error)
FAIL: gcc.target/i386/pr58137.c (test for excess errors)
FAIL: gcc.target/i386/pr64110.c (internal compiler error)
FAIL: gcc.target/i386/pr64110.c (test for excess errors)