Regressions on trunk at revision 169250 vs revision 169243

[H.J. Lu Intel64-profiled]

New failures:
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto -flto-partition=none  execution test
WARNING: program timed out.

New passes:
FAIL: gcc.dg/guality/pr43479.c  -O2 -flto -flto-partition=none  line 13 h == 9
FAIL: gcc.dg/guality/vla-2.c  -O2 -flto -flto-partition=none  line 25 sizeof (a) == 6 * sizeof (int)