Regressions on trunk at revision 270051 vs revision 270012

[H.J. Lu (Intel64 AVX2)]

New failures:

New passes:
FAIL: gcc.target/i386/pr49095.c scan-assembler-times \\), % 45
FAIL: gcc.target/i386/pr49095.c scan-assembler-times \\), % 45
FAIL: gcc.target/i386/pr49095.c scan-assembler-times \\), % 57