Regressions on trunk at revision 260988 vs revision 260974

[H.J. Lu ia32]

New failures:
FAIL: gcc.dg/noncompile/pr55976-1.c   -O0  (test for excess errors)
FAIL: gcc.dg/noncompile/pr55976-1.c   -O1  (test for excess errors)
FAIL: gcc.dg/noncompile/pr55976-1.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
FAIL: gcc.dg/noncompile/pr55976-1.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
FAIL: gcc.dg/noncompile/pr55976-1.c   -O2  (test for excess errors)
FAIL: gcc.dg/noncompile/pr55976-1.c   -O3 -g  (test for excess errors)
FAIL: gcc.dg/noncompile/pr55976-1.c   -Os  (test for excess errors)

New passes: