[NFC][LLVM][SVE] Simplify isel for BSL and NBSL. (#90233)

Author: paulwalker-arm

llvm/lib/Target/AArch64/AArch64InstrInfo.td

@@ -746,8 +746,6 @@ def AArch64vsli : SDNode<"AArch64ISD::VSLI", SDT_AArch64vshiftinsert>;
 def AArch64vsri : SDNode<"AArch64ISD::VSRI", SDT_AArch64vshiftinsert>;
 
 def AArch64bsp: SDNode<"AArch64ISD::BSP", SDT_AArch64trivec>;
-def AArch64nbsl: PatFrag<(ops node:$Op1, node:$Op2, node:$Op3),
-                         (vnot (AArch64bsp node:$Op1, node:$Op2, node:$Op3))>;
 
 def AArch64cmeq: SDNode<"AArch64ISD::CMEQ", SDT_AArch64binvec>;
 def AArch64cmge: SDNode<"AArch64ISD::CMGE", SDT_AArch64binvec>;

llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td

@@ -508,6 +508,16 @@ def AArch64smulh : PatFrag<(ops node:$op1, node:$op2),
 def AArch64umulh : PatFrag<(ops node:$op1, node:$op2),
                            (AArch64umulh_p (SVEAnyPredicate), node:$op1, node:$op2)>;
 
+
+def AArch64bsl  : PatFrags<(ops node:$Op1, node:$Op2, node:$Op3),
+                           [(int_aarch64_sve_bsl node:$Op1, node:$Op2, node:$Op3),
+                            (AArch64bsp node:$Op3, node:$Op1, node:$Op2)]>;
+
+def AArch64nbsl : PatFrags<(ops node:$Op1, node:$Op2, node:$Op3),
+                           [(int_aarch64_sve_nbsl node:$Op1, node:$Op2, node:$Op3),
+                            (vnot (AArch64bsp node:$Op3, node:$Op1, node:$Op2))]>;
+
+
 let Predicates = [HasSVE] in {
   def RDFFR_PPz  : sve_int_rdffr_pred<0b0, "rdffr", int_aarch64_sve_rdffr_z>;
   def RDFFRS_PPz : sve_int_rdffr_pred<0b1, "rdffrs">;
@@ -3757,10 +3767,10 @@ let Predicates = [HasSVE2orSME] in {
   // SVE2 bitwise ternary operations
   defm EOR3_ZZZZ  : sve2_int_bitwise_ternary_op<0b000, "eor3",  AArch64eor3>;
   defm BCAX_ZZZZ  : sve2_int_bitwise_ternary_op<0b010, "bcax",  AArch64bcax>;
-  defm BSL_ZZZZ   : sve2_int_bitwise_ternary_op<0b001, "bsl",   int_aarch64_sve_bsl, AArch64bsp>;
+  defm BSL_ZZZZ   : sve2_int_bitwise_ternary_op<0b001, "bsl",   AArch64bsl>;
   defm BSL1N_ZZZZ : sve2_int_bitwise_ternary_op<0b011, "bsl1n", int_aarch64_sve_bsl1n>;
   defm BSL2N_ZZZZ : sve2_int_bitwise_ternary_op<0b101, "bsl2n", int_aarch64_sve_bsl2n>;
-  defm NBSL_ZZZZ  : sve2_int_bitwise_ternary_op<0b111, "nbsl",  int_aarch64_sve_nbsl, AArch64nbsl>;
+  defm NBSL_ZZZZ  : sve2_int_bitwise_ternary_op<0b111, "nbsl",  AArch64nbsl>;
 
   // SVE2 bitwise xor and rotate right by immediate
   defm XAR_ZZZI : sve2_int_rotate_right_imm<"xar", int_aarch64_sve_xar>;

llvm/lib/Target/AArch64/SVEInstrFormats.td

@@ -605,13 +605,6 @@ class SVE_2_Op_Fp_Imm_Pat_Zero<ValueType vt, SDPatternOperator op,
                       (vt (splat_vector (it immL))))),
       (inst $Pg, $Zs1, imm)>;
 
-// Used to re-order the operands of BSP when lowering to BSL. BSP has the order:
-// mask, in1, in2 whereas BSL for SVE2 has them ordered in1, in2, mask
-class SVE_3_Op_BSP_Pat<ValueType vtd, SDPatternOperator op, ValueType vt1,
-                   ValueType vt2, ValueType vt3, Instruction inst>
-: Pat<(vtd (op vt1:$Op1, vt2:$Op2, vt3:$Op3)),
-      (inst $Op2, $Op3, $Op1)>;
-
 class SVE_Shift_Add_All_Active_Pat<ValueType vtd, SDPatternOperator op, ValueType pt,
                                    ValueType vt1, ValueType vt2, ValueType vt3,
                                    Instruction inst>
@@ -4922,8 +4915,8 @@ class sve2_int_bitwise_ternary_op_d<bits<3> opc, string asm>
   let hasSideEffects = 0;
 }
 
-multiclass sve2_int_bitwise_ternary_op<bits<3> opc, string asm, SDPatternOperator op,
-                                       SDPatternOperator ir_op = null_frag> {
+multiclass sve2_int_bitwise_ternary_op<bits<3> opc, string asm,
+                                       SDPatternOperator op> {
   def NAME : sve2_int_bitwise_ternary_op_d<opc, asm>;
 
   def : InstAlias<asm # "\t$Zdn, $Zdn, $Zm, $Zk",
@@ -4937,11 +4930,6 @@ multiclass sve2_int_bitwise_ternary_op<bits<3> opc, string asm, SDPatternOperato
   def : SVE_3_Op_Pat<nxv8i16, op, nxv8i16, nxv8i16, nxv8i16, !cast<Instruction>(NAME)>;
   def : SVE_3_Op_Pat<nxv4i32, op, nxv4i32, nxv4i32, nxv4i32, !cast<Instruction>(NAME)>;
   def : SVE_3_Op_Pat<nxv2i64, op, nxv2i64, nxv2i64, nxv2i64, !cast<Instruction>(NAME)>;
-
-  def : SVE_3_Op_BSP_Pat<nxv16i8, ir_op, nxv16i8, nxv16i8, nxv16i8, !cast<Instruction>(NAME)>;
-  def : SVE_3_Op_BSP_Pat<nxv8i16, ir_op, nxv8i16, nxv8i16, nxv8i16, !cast<Instruction>(NAME)>;
-  def : SVE_3_Op_BSP_Pat<nxv4i32, ir_op, nxv4i32, nxv4i32, nxv4i32, !cast<Instruction>(NAME)>;
-  def : SVE_3_Op_BSP_Pat<nxv2i64, ir_op, nxv2i64, nxv2i64, nxv2i64, !cast<Instruction>(NAME)>;
 }
 
 class sve2_int_rotate_right_imm<bits<4> tsz8_64, string asm,