Regressions on trunk at revision 221169 vs revision 221147

[H.J. Lu ia32]

New failures:
FAIL: gcc.target/i386/chkp-strchr.c (internal compiler error)
FAIL: gcc.target/i386/chkp-strchr.c (test for excess errors)
FAIL: gcc.target/i386/pr63995-2.c (internal compiler error)
FAIL: gcc.target/i386/pr63995-2.c (test for excess errors)

New passes:
FAIL: gfortran.dg/class_allocate_18.f90   -O0  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O1  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O2  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O3 -fomit-frame-pointer  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O3 -fomit-frame-pointer -funroll-loops  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O3 -g  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -Os  execution test