[X86] Fix instr desc of CFCMOV's 'mr' variants

- With the memory operand as the destination, 'mr' variants of CFCMOV
  works like STORE and their memory operands should be input operands
  instead of output ones.

Reviewers: XinWang10, arsenm

Pull Request: #88970

llvm/lib/Target/X86/X86InstrCMovSetCC.td

@@ -58,8 +58,8 @@ let SchedRW = [WriteCMOV.Folded, WriteCMOV.ReadAfterFold] in {
 }
 let SchedRW = [WriteCMOV, ReadDefault, ReadDefault, ReadDefault, ReadDefault, ReadDefault],
     Predicates = [HasCMOV, HasCF, In64BitMode], mayStore = 1 in
-  def mr : ITy<0x40, MRMDestMemCC, t, (outs t.MemOperand:$dst),
-                (ins t.RegClass:$src1, ccode:$cond),
+  def mr : ITy<0x40, MRMDestMemCC, t, (outs),
+                (ins t.MemOperand:$dst, t.RegClass:$src1, ccode:$cond),
                 "cfcmov${cond}", unaryop_ndd_args, []>, UseEFLAGS, NF;
 }