Regressions on trunk at revision 221872 vs revision 221868

[Intel Automatic Testing System [Intel64 Core AVX2 PIC]]

New failures:

New passes:
FAIL: g++.dg/torture/pr64378.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (internal compiler error)
FAIL: g++.dg/torture/pr64378.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (internal compiler error)
FAIL: g++.dg/torture/pr64378.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/pr64378.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)