Regressions on trunk at revision 236012 vs revision 236003

[H.J. Lu Intel64 -fpic -mcmodel=medium -mcmodel=large]

New failures:

New passes:
FAIL: boehm-gc.c/gctest.c -O2 execution test
FAIL: g++.dg/pr62079.C   (internal compiler error)
FAIL: g++.dg/pr62079.C   (internal compiler error)
FAIL: g++.dg/pr62079.C   (internal compiler error)
FAIL: g++.dg/pr62079.C   (test for excess errors)
FAIL: g++.dg/pr62079.C   (test for excess errors)
FAIL: g++.dg/pr62079.C   (test for excess errors)