Regressions on trunk at revision 239748 vs revision 239735

[Intel Automatic Testing System [Intel64 Core AVX2]]

New failures:

New passes:
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-assembler-times prefetchnta 1
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-assembler-times prefetcht 1
FAIL: gcc.dg/tree-ssa/prefetch-7.c scan-assembler-times prefetchw 5