Regressions on trunk at revision 221802 vs revision 221795

[Intel Automatic Testing System [ia32 Core AVX2]]

New failures:
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)

New passes: