Regressions on trunk at revision 154667 vs revision 154645

[H.J. Lu]

New failures:
FAIL: gcc.target/i386/vperm-v4sf-1.c (test for excess errors)
FAIL: gcc.target/i386/vperm-v4si-2x.c (test for excess errors)

New passes:
FAIL: g++.dg/torture/stackalign/unwind-2.C  -O1  execution test
FAIL: g++.dg/torture/stackalign/unwind-2.C  -O2  execution test
FAIL: g++.dg/torture/stackalign/unwind-2.C  -O2 -flto  execution test
FAIL: g++.dg/torture/stackalign/unwind-2.C  -O2 -fwhopr  execution test