(expand_binop, expand_twoval_binop): If we are going to fail, remove any load from MEM we did due to -fforce-mem...

(expand_binop, expand_twoval_binop): If we are going
to fail, remove any load from MEM we did due to -fforce-mem;
if the MEM was volatile, this will cause an extra load.

(expand_complex_abs): Likewise.
Correct use of variable LAST so it doesn't include the load
from MEM (to fix unrelated bug).

From-SVN: r2797