[AArch64] Remove unused ISD nodes (NFC) (#140706)

Part of #140472.

Author: MacDue

llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp

@@ -7216,57 +7216,6 @@ void AArch64DAGToDAGISel::Select(SDNode *Node) {
     }
     break;
   }
-  case AArch64ISD::SVE_LD2_MERGE_ZERO: {
-    if (VT == MVT::nxv16i8) {
-      SelectPredicatedLoad(Node, 2, 0, AArch64::LD2B_IMM, AArch64::LD2B);
-      return;
-    } else if (VT == MVT::nxv8i16 || VT == MVT::nxv8f16 ||
-               VT == MVT::nxv8bf16) {
-      SelectPredicatedLoad(Node, 2, 1, AArch64::LD2H_IMM, AArch64::LD2H);
-      return;
-    } else if (VT == MVT::nxv4i32 || VT == MVT::nxv4f32) {
-      SelectPredicatedLoad(Node, 2, 2, AArch64::LD2W_IMM, AArch64::LD2W);
-      return;
-    } else if (VT == MVT::nxv2i64 || VT == MVT::nxv2f64) {
-      SelectPredicatedLoad(Node, 2, 3, AArch64::LD2D_IMM, AArch64::LD2D);
-      return;
-    }
-    break;
-  }
-  case AArch64ISD::SVE_LD3_MERGE_ZERO: {
-    if (VT == MVT::nxv16i8) {
-      SelectPredicatedLoad(Node, 3, 0, AArch64::LD3B_IMM, AArch64::LD3B);
-      return;
-    } else if (VT == MVT::nxv8i16 || VT == MVT::nxv8f16 ||
-               VT == MVT::nxv8bf16) {
-      SelectPredicatedLoad(Node, 3, 1, AArch64::LD3H_IMM, AArch64::LD3H);
-      return;
-    } else if (VT == MVT::nxv4i32 || VT == MVT::nxv4f32) {
-      SelectPredicatedLoad(Node, 3, 2, AArch64::LD3W_IMM, AArch64::LD3W);
-      return;
-    } else if (VT == MVT::nxv2i64 || VT == MVT::nxv2f64) {
-      SelectPredicatedLoad(Node, 3, 3, AArch64::LD3D_IMM, AArch64::LD3D);
-      return;
-    }
-    break;
-  }
-  case AArch64ISD::SVE_LD4_MERGE_ZERO: {
-    if (VT == MVT::nxv16i8) {
-      SelectPredicatedLoad(Node, 4, 0, AArch64::LD4B_IMM, AArch64::LD4B);
-      return;
-    } else if (VT == MVT::nxv8i16 || VT == MVT::nxv8f16 ||
-               VT == MVT::nxv8bf16) {
-      SelectPredicatedLoad(Node, 4, 1, AArch64::LD4H_IMM, AArch64::LD4H);
-      return;
-    } else if (VT == MVT::nxv4i32 || VT == MVT::nxv4f32) {
-      SelectPredicatedLoad(Node, 4, 2, AArch64::LD4W_IMM, AArch64::LD4W);
-      return;
-    } else if (VT == MVT::nxv2i64 || VT == MVT::nxv2f64) {
-      SelectPredicatedLoad(Node, 4, 3, AArch64::LD4D_IMM, AArch64::LD4D);
-      return;
-    }
-    break;
-  }
   }
 
   // Select the default instruction
@@ -7340,15 +7289,6 @@ static EVT getMemVTFromNode(LLVMContext &Ctx, SDNode *Root) {
     return cast<VTSDNode>(Root->getOperand(3))->getVT();
   case AArch64ISD::ST1_PRED:
     return cast<VTSDNode>(Root->getOperand(4))->getVT();
-  case AArch64ISD::SVE_LD2_MERGE_ZERO:
-    return getPackedVectorTypeFromPredicateType(
-        Ctx, Root->getOperand(1)->getValueType(0), /*NumVec=*/2);
-  case AArch64ISD::SVE_LD3_MERGE_ZERO:
-    return getPackedVectorTypeFromPredicateType(
-        Ctx, Root->getOperand(1)->getValueType(0), /*NumVec=*/3);
-  case AArch64ISD::SVE_LD4_MERGE_ZERO:
-    return getPackedVectorTypeFromPredicateType(
-        Ctx, Root->getOperand(1)->getValueType(0), /*NumVec=*/4);
   default:
     break;
   }

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -2957,9 +2957,6 @@ const char *AArch64TargetLowering::getTargetNodeName(unsigned Opcode) const {
     MAKE_CASE(AArch64ISD::LDFF1S_MERGE_ZERO)
     MAKE_CASE(AArch64ISD::LD1RQ_MERGE_ZERO)
     MAKE_CASE(AArch64ISD::LD1RO_MERGE_ZERO)
-    MAKE_CASE(AArch64ISD::SVE_LD2_MERGE_ZERO)
-    MAKE_CASE(AArch64ISD::SVE_LD3_MERGE_ZERO)
-    MAKE_CASE(AArch64ISD::SVE_LD4_MERGE_ZERO)
     MAKE_CASE(AArch64ISD::GLD1_MERGE_ZERO)
     MAKE_CASE(AArch64ISD::GLD1_SCALED_MERGE_ZERO)
     MAKE_CASE(AArch64ISD::GLD1_SXTW_MERGE_ZERO)
@@ -3019,7 +3016,6 @@ const char *AArch64TargetLowering::getTargetNodeName(unsigned Opcode) const {
     MAKE_CASE(AArch64ISD::CTLZ_MERGE_PASSTHRU)
     MAKE_CASE(AArch64ISD::CTPOP_MERGE_PASSTHRU)
     MAKE_CASE(AArch64ISD::DUP_MERGE_PASSTHRU)
-    MAKE_CASE(AArch64ISD::INDEX_VECTOR)
     MAKE_CASE(AArch64ISD::ADDP)
     MAKE_CASE(AArch64ISD::SADDLP)
     MAKE_CASE(AArch64ISD::UADDLP)

llvm/lib/Target/AArch64/AArch64ISelLowering.h

@@ -362,7 +362,6 @@ enum NodeType : unsigned {
   CTLZ_MERGE_PASSTHRU,
   CTPOP_MERGE_PASSTHRU,
   DUP_MERGE_PASSTHRU,
-  INDEX_VECTOR,
 
   // Cast between vectors of the same element type but differ in length.
   REINTERPRET_CAST,
@@ -380,11 +379,6 @@ enum NodeType : unsigned {
   LD1RQ_MERGE_ZERO,
   LD1RO_MERGE_ZERO,
 
-  // Structured loads.
-  SVE_LD2_MERGE_ZERO,
-  SVE_LD3_MERGE_ZERO,
-  SVE_LD4_MERGE_ZERO,
-
   // Unsigned gather loads.
   GLD1_MERGE_ZERO,
   GLD1_SCALED_MERGE_ZERO,