Regressions on trunk at revision 239570 vs revision 239553

[H.J. Lu x32]

New failures:
FAIL: gcc.dg/tree-ssa/pr71347.c scan-tree-dump-not optimized ".* = MEM.*;"

New passes:
FAIL: gcc.dg/autopar/pr46193.c scan-tree-dump-times parloops2 "parallelizing inner loop" 2