Regressions on trunk at revision 172970 vs revision 172963

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gcc.dg/guality/vla-1.c  -O2 -flto  line 17 sizeof (a) == 6
FAIL: gcc.dg/guality/vla-1.c  -O2 -flto -flto-partition=none  line 17 sizeof (a) == 6
FAIL: gcc.dg/tree-prof/val-prof-2.c scan-tree-dump optimized "n_[0-9]* \+ 4294967295"