Regressions on trunk at revision 202958 vs revision 202951

[H.J. Lu ia32 Core 2/i7]

New failures:

New passes:
FAIL: gfortran.dg/round_4.f90  -O0  execution test
FAIL: gfortran.dg/round_4.f90  -O1  execution test
FAIL: gfortran.dg/round_4.f90  -O2  execution test
FAIL: gfortran.dg/round_4.f90  -O3 -fomit-frame-pointer  execution test
FAIL: gfortran.dg/round_4.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  execution test
FAIL: gfortran.dg/round_4.f90  -O3 -fomit-frame-pointer -funroll-loops  execution test
FAIL: gfortran.dg/round_4.f90  -O3 -g  execution test
FAIL: gfortran.dg/round_4.f90  -Os  execution test