Regressions on trunk at revision 216295 vs revision 216139

[H.J. Lu x32]

New failures:
FAIL: gcc.target/i386/avx512f-pr57233.c (test for excess errors)
FAIL: gcc.target/i386/avx512f-typecast-1.c (test for excess errors)
FAIL: gcc.target/i386/pr37184.c (test for excess errors)
FAIL: gcc.target/i386/vectorize4.c (test for excess errors)

New passes: