Regressions on trunk at revision 168084 vs revision 168072

[H.J. Lu Intel64-profiled]

New failures:

New passes:
FAIL: gcc.dg/guality/pr43479.c  -O2 -flto  line 18 h == 9
FAIL: gcc.dg/guality/vla-2.c  -O2 -flto  line 25 sizeof (a) == 6 * sizeof (int)
FAIL: gcc.dg/guality/vla-2.c  -O3 -g  line 25 sizeof (a) == 6 * sizeof (int)