Regressions on trunk at revision 244879 vs revision 244860

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: gcc.dg/rtl/x86_64/dfinit.c execution test
FAIL: gcc.dg/rtl/x86_64/final.c (internal compiler error)
FAIL: gcc.dg/rtl/x86_64/final.c (test for excess errors)
FAIL: gcc.dg/rtl/x86_64/into-cfglayout.c execution test
FAIL: gcc.dg/rtl/x86_64/ira.c execution test
FAIL: gcc.dg/rtl/x86_64/times-two.c.after-expand.c execution test
FAIL: gcc.dg/rtl/x86_64/vregs.c execution test
FAIL: g++.dg/cpp1z/class-deduction15.C   (internal compiler error)
FAIL: g++.dg/cpp1z/class-deduction15.C   (test for excess errors)

New passes: