Regressions on trunk at revision 247757 vs revision 247754

[H.J. Lu Intel64 Core i7]

New failures:

New passes:
FAIL: gfortran.dg/matmul_6.f90   -O1  execution test
FAIL: gfortran.dg/matmul_6.f90   -O2  execution test
FAIL: gfortran.dg/matmul_6.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/matmul_6.f90   -O3 -g  execution test
FAIL: gfortran.dg/matmul_6.f90   -Os  execution test
FAIL: gfortran.dg/operator_1.f90   -O1  execution test
FAIL: gfortran.dg/operator_1.f90   -O2  execution test
FAIL: gfortran.dg/operator_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gfortran.dg/operator_1.f90   -O3 -g  execution test
FAIL: gfortran.dg/operator_1.f90   -Os  execution test