Regressions on trunk at revision 258423 vs revision 258411

[H.J. Lu]

New failures:

New passes:
FAIL: gcc.target/i386/pr55512-1.c (internal compiler error)
FAIL: gcc.target/i386/pr55512-1.c (internal compiler error)
FAIL: gcc.target/i386/pr55512-1.c (test for excess errors)
FAIL: gcc.target/i386/pr55512-1.c (test for excess errors)
FAIL: gcc.target/i386/pr55512-2.c (internal compiler error)
FAIL: gcc.target/i386/pr55512-2.c (internal compiler error)
FAIL: gcc.target/i386/pr55512-2.c (test for excess errors)
FAIL: gcc.target/i386/pr55512-2.c (test for excess errors)
FAIL: gcc.target/i386/pr55512-3.c (internal compiler error)
FAIL: gcc.target/i386/pr55512-3.c (internal compiler error)
FAIL: gcc.target/i386/pr55512-3.c (test for excess errors)
FAIL: gcc.target/i386/pr55512-3.c (test for excess errors)
FAIL: gcc.target/i386/pr55512-4.c (internal compiler error)
FAIL: gcc.target/i386/pr55512-4.c (internal compiler error)
FAIL: gcc.target/i386/pr55512-4.c (test for excess errors)
FAIL: gcc.target/i386/pr55512-4.c (test for excess errors)
FAIL: gcc.target/i386/pr78911-2.c (test for excess errors)
FAIL: g++.dg/ubsan/vptr-11.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (internal compiler error)
FAIL: g++.dg/ubsan/vptr-11.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
FAIL: g++.dg/ubsan/vptr-11.C   -O2  (internal compiler error)
FAIL: g++.dg/ubsan/vptr-11.C   -O2  (test for excess errors)