[AArch64][SME] Change output class of FORM_TRANSPOSED_REG_TUPLE pseudos (llvm#123755)

The FORM_TRANSPOSED_REG_TUPLE pseudo nodes use either the ZPR2Mul2
or ZPR4Mul4 register classes for output. This patch changes the class
so that these can be extended to other multi-vector intrinsics which
instead create a ZPR2/ZPR4 register sequence.

Author: kmclaughlin-arm

llvm/lib/Target/AArch64/SMEInstrFormats.td

@@ -46,14 +46,14 @@ def am_sme_indexed_b4 : ComplexPattern<iPTR, 2, "SelectAddrModeIndexedSVE<0, 15>
 // to a REG_SEQUENCE using the post-isel hook.
 
 def FORM_TRANSPOSED_REG_TUPLE_X2_PSEUDO :
-  Pseudo<(outs ZPR2Mul2:$tup),
+  Pseudo<(outs ZPR2:$tup),
          (ins ZPR:$zn0, ZPR:$zn1), []>, Sched<[]>{
   let hasSideEffects = 0;
   let hasPostISelHook = 1;
 }
 
 def FORM_TRANSPOSED_REG_TUPLE_X4_PSEUDO :
-  Pseudo<(outs ZPR4Mul4:$tup),
+  Pseudo<(outs ZPR4:$tup),
          (ins ZPR:$zn0, ZPR:$zn1, ZPR:$zn2, ZPR:$zn3), []>, Sched<[]>{
   let hasSideEffects = 0;
   let hasPostISelHook = 1;
@@ -164,14 +164,14 @@ class SME2_ZA_TwoOp_Multi_Single_Pat<string name, SDPatternOperator intrinsic, O
 class SME2_ZA_TwoOp_VG2_Multi_Single_Pat<string name, SDPatternOperator intrinsic, Operand index_ty, ZPRRegOp zpr_ty,
                                          ValueType vt, ComplexPattern tileslice>
     : Pat<(intrinsic (i32 (tileslice MatrixIndexGPR32Op8_11:$base, index_ty:$offset)), vt:$Zn1, vt:$Zn2, vt:$Zm),
-          (!cast<Instruction>(name # _PSEUDO) $base, $offset, (REG_SEQUENCE ZPR2, vt:$Zn1, zsub0, vt:$Zn2, zsub1),
+          (!cast<Instruction>(name # _PSEUDO) $base, $offset, (FORM_TRANSPOSED_REG_TUPLE_X2_PSEUDO vt:$Zn1, vt:$Zn2),
                                               zpr_ty:$Zm)>;
 class SME2_ZA_TwoOp_VG4_Multi_Single_Pat<string name, SDPatternOperator intrinsic, Operand index_ty, ZPRRegOp zpr_ty,
                                          ValueType vt, ComplexPattern tileslice>
     : Pat<(intrinsic (i32 (tileslice MatrixIndexGPR32Op8_11:$base, index_ty:$offset)),
                      vt:$Zn1, vt:$Zn2, vt:$Zn3, vt:$Zn4, vt:$Zm),
           (!cast<Instruction>(name # _PSEUDO) $base, $offset,
-                                              (REG_SEQUENCE ZPR4, vt:$Zn1, zsub0, vt:$Zn2, zsub1, vt:$Zn3, zsub2, vt:$Zn4, zsub3),
+                                              (FORM_TRANSPOSED_REG_TUPLE_X4_PSEUDO vt:$Zn1, vt:$Zn2, vt:$Zn3, vt:$Zn4),
                                               zpr_ty:$Zm)>;
 
 class SME2_ZA_TwoOp_VG2_Multi_Multi_Pat<string name, SDPatternOperator intrinsic, Operand index_ty, ValueType vt, ComplexPattern tileslice>