Regressions on trunk at revision 168970 vs revision 168952

[H.J. Lu Intel64-profiled]

New failures:
FAIL: gcc.dg/guality/pr43479.c  -O2 -flto -flto-partition=none  line 13 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  -O2 -flto -flto-partition=none  line 25 sizeof (a) == 6 * sizeof (int)
FAIL: gcc.dg/guality/vla-2.c  -O3 -g  line 25 sizeof (a) == 6 * sizeof (int)

New passes: