[AMDGPU][NFC] Clean up the VOP profile definition for v_swap_b32.

[kosarev]

Summary

v_swap_b32 is a VOP1-only instruction, meaning it neither encodes src1
nor has 64-bit encodings.

[foad]

LGTM, thanks!

llvm/lib/Target/AMDGPU/VOP1Instructions.td

def : GCNPat<
     (V_CVT_F32_F16_t16_e32 $src)
 >;
 def : GCNPat<
     (i16 (AMDGPUfp_to_f16 f32:$src)),
     (V_CVT_F16_F32_t16_e32 $src)
 >;
 }
 
-def VOP_SWAP_I32 : VOPProfile<[i32, i32, i32, untyped]> {
+def VOP_SWAP_I32 : VOPProfile<[i32, i32, untyped, untyped]> {
   let Outs32 = (outs VGPR_32:$vdst, VRegSrc_32:$vdst1);
   let Ins32 = (ins VRegSrc_32:$src0, VGPR_32:$src1);
-  let Outs64 = Outs32;
   let Asm32 = " $vdst, $src0";
-  let Asm64 = "";
-  let Ins64 = (ins);
 }
 
 let SubtargetPredicate = isGFX9Plus in {
   def V_SWAP_B32 : VOP1_Pseudo<"v_swap_b32", VOP_SWAP_I32, [], 1> {
     let Constraints = "$vdst = $src1, $vdst1 = $src0";
     let DisableEncoding = "$vdst1,$src1";
     let SchedRW = [Write64Bit, Write64Bit];
   }