Regressions on trunk at revision 256866 vs revision 256856

[H.J. Lu x32]

New failures:

New passes:
FAIL: g++.dg/template/inherit4.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/template/inherit4.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/torture/pr83619.C   -O0  (test for excess errors)
FAIL: g++.dg/torture/pr83619.C   -O1  (test for excess errors)
FAIL: g++.dg/torture/pr83619.C   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/pr83619.C   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
FAIL: g++.dg/torture/pr83619.C   -O2  (test for excess errors)
FAIL: g++.dg/torture/pr83619.C   -O3 -g  (test for excess errors)
FAIL: g++.dg/torture/pr83619.C   -Os  (test for excess errors)