Regressions on master at commit r13-4837 vs commit r13-4817 on Linux/i686

[H.J. Lu]

New failures:
FAIL: gcc.target/i386/avx512vl-vpexpandq-1.c (internal compiler error: Segmentation fault)
FAIL: gcc.target/i386/avx512vl-vpexpandq-1.c (test for excess errors)
FAIL: g++.old-deja/g++.other/thunk1.C  -std=c++98 execution test
FAIL: g++.old-deja/g++.other/thunk1.C  -std=c++98 (test for excess errors)

New passes:
FAIL: ctestzstd
FAIL: gcc.target/i386/avx512dq-pr90991-2.c (internal compiler error: in pop_scope, at c/c-decl.cc:1391)
FAIL: gcc.target/i386/avx512dq-pr90991-2.c (test for excess errors)