Regressions on trunk at revision 253975 vs revision 253970

[H.J. Lu ia32 -fpic]

New failures:

New passes:
FAIL: gcc.dg/vect/costmodel/i386/costmodel-vect-31.c scan-tree-dump-times vect "vectorized 4 loops" 1 (found 0 times)
FAIL: gcc.target/i386/pr70021.c scan-tree-dump-times vect "vectorized 1 loops" 2 (found 1 times)