i386.md (*push<mode>2): Use "o" constraint instead of "m" for operand 0.
* config/i386/i386.md (*push<mode>2): Use "o" constraint instead
of "m" for operand 0. Add type and mode attribute.
(*pushxf_nointeger"): Use "<" constraint for operand 0.
(*pushdf_rex64): New pattern, split out of *pushdf. Use "m"
constraint instead of "o" for opreand 1.
(*pushdf): Disable for TARGET_64BIT. Correct mode attribute.