* reload.c (find_reloads): Record the existing mode if
        operand_mode == VOIDmode before replacing a register with
        a constant.
        * i386.md (tstsi, tsthi, tstqi, tstsf, tstdf, tstxf): Set
        i386_compare_op1 to const0_rtx for the benefit of the
        conditional move patterns.
        (movsicc, movhicc, movsfcc, movdfcc, movxfcc, movdicc): Rewrite
        based on suggestions from Jim Wilson.

From-SVN: r20151