PR target/6753
* config/i386/i386.md (sse_movdfcc, sse_movdfcc_eq): Use Y instead
of x in constraints for clarity.
(sse_mov?fcc split): abort if op2 == op3.
(sse_movsfcc_const0_1, sse_movsfcc_const0_2, sse_movsfcc_const0_3,
sse_movsfcc_const0_4): Add earlyclobber.
(sse_movdfcc_const0_1, sse_movdfcc_const0_2, sse_movdfcc_const0_3,
sse_movdfcc_const0_4): Likewise. Use DFmode, not SFmode.
Use Y instead of x in constraints.
* gcc.dg/20020523-1.c: New test.
From-SVN: r53784
