Regressions on trunk at revision 173506 vs revision 173494

[H.J. Lu Intel64 LTO/FDO]

New failures:
FAIL: gcc.dg/guality/vla-1.c  -O2 -flto -flto-partition=none  line 17 sizeof (a) == 6
FAIL: gfortran.dg/coarray/this_image_2.f90 -fcoarray=lib  -O2  -lcaf_single (test for excess errors)
FAIL: gfortran.dg/coarray/this_image_2.f90 -fcoarray=lib  -O2  -lcaf_single (test for excess errors)

New passes:
FAIL: gcc.dg/guality/vla-1.c  -O2 -flto  line 17 sizeof (a) == 6