Regressions on trunk at revision 255003 vs revision 254976

[H.J. Lu x32]

New failures:
FAIL: gcc.c-torture/execute/921117-1.c   -O1  execution test
FAIL: gcc.c-torture/execute/pr51877.c   -Os  execution test
FAIL: gcc.c-torture/execute/va-arg-22.c   -Os  execution test
FAIL: gcc.dg/guality/nrv-1.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 20 a2.i[0] == 42
FAIL: gcc.dg/torture/pr70421.c   -Os  execution test
FAIL: gfortran.dg/array_function_5.f90   -Os  execution test
FAIL: gfortran.dg/dependency_25.f90   -Os  execution test
FAIL: gfortran.dg/derived_constructor_comps_5.f90   -Os  execution test
FAIL: gfortran.dg/derived_constructor_comps_6.f90   -Os  execution test
FAIL: gfortran.dg/extends_2.f03   -Os  execution test
FAIL: gfortran.dg/extends_3.f03   -Os  execution test
FAIL: gfortran.dg/extends_4.f03   -Os  execution test
FAIL: gfortran.dg/matmul_3.f90   -Os  execution test
FAIL: gfortran.dg/pr65504.f90   -Os  execution test
FAIL: gfortran.dg/select_type_39.f03   -Os  execution test
FAIL: gfortran.dg/sizeof_4.f90   -Os  execution test

New passes: