Index: llvm/include/llvm/IR/IntrinsicsAArch64.td
===================================================================
--- llvm/include/llvm/IR/IntrinsicsAArch64.td
+++ llvm/include/llvm/IR/IntrinsicsAArch64.td
@@ -1103,6 +1103,23 @@
                  llvm_i64_ty],
                 [IntrNoMem, ImmArg<3>]>;
 
+  class AdvSIMD_SVE_CDOT_Intrinsic
+    : Intrinsic<[llvm_anyvector_ty],
+                [LLVMMatchType<0>,
+                 LLVMSubdivide4VectorType<0>,
+                 LLVMSubdivide4VectorType<0>,
+                 llvm_i32_ty],
+                [IntrNoMem]>;
+
+  class AdvSIMD_SVE_CDOT_LANE_Intrinsic
+    : Intrinsic<[llvm_anyvector_ty],
+                [LLVMMatchType<0>,
+                 LLVMSubdivide4VectorType<0>,
+                 LLVMSubdivide4VectorType<0>,
+                 llvm_i32_ty,
+                 llvm_i32_ty],
+                [IntrNoMem, ImmArg<3>]>;
+
   // NOTE: There is no relationship between these intrinsics beyond an attempt
   // to reuse currently identical class definitions.
   class AdvSIMD_SVE_LOGB_Intrinsic  : AdvSIMD_SVE_CNT_Intrinsic;
@@ -1697,6 +1714,13 @@
 def int_aarch64_sve_ursqrte       : AdvSIMD_Merged1VectorArg_Intrinsic;
 
 //
+// SVE2 - Widening complex integer dot product
+//
+
+def int_aarch64_sve_cdot      : AdvSIMD_SVE_CDOT_Intrinsic;
+def int_aarch64_sve_cdot_lane : AdvSIMD_SVE_CDOT_LANE_Intrinsic;
+
+//
 // SVE2 - Non-widening pairwise arithmetic
 //
 
Index: llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
===================================================================
--- llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
+++ llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
@@ -1442,10 +1442,10 @@
   def : Pat<(nxv2i64 (int_aarch64_sve_umulh (nxv2i1 (AArch64ptrue 31)), nxv2i64:$Op1, nxv2i64:$Op2)),
             (UMULH_ZZZ_D $Op1, $Op2)>;
   // SVE2 complex integer dot product (indexed)
-  defm CDOT_ZZZI : sve2_cintx_dot_by_indexed_elem<"cdot">;
+  defm CDOT_ZZZI : sve2_cintx_dot_by_indexed_elem<"cdot", int_aarch64_sve_cdot_lane>;
 
   // SVE2 complex integer dot product
-  defm CDOT_ZZZ : sve2_cintx_dot<"cdot">;
+  defm CDOT_ZZZ : sve2_cintx_dot<"cdot", int_aarch64_sve_cdot>;
 
   // SVE2 complex integer multiply-add (indexed)
   defm CMLA_ZZZI      : sve2_cmla_by_indexed_elem<0b0, "cmla">;
Index: llvm/lib/Target/AArch64/SVEInstrFormats.td
===================================================================
--- llvm/lib/Target/AArch64/SVEInstrFormats.td
+++ llvm/lib/Target/AArch64/SVEInstrFormats.td
@@ -2538,9 +2538,16 @@
   let ElementSize = ElementSizeNone;
 }
 
-multiclass sve2_cintx_dot<string asm> {
+multiclass sve2_cintx_dot<string asm, SDPatternOperator op> {
   def _S : sve2_complex_int_arith<0b10, 0b0001, asm, ZPR32, ZPR8>;
   def _D : sve2_complex_int_arith<0b11, 0b0001, asm, ZPR64, ZPR16>;
+
+  def : Pat<(nxv4i32 (op (nxv4i32 ZPR32:$Op1), (nxv16i8 ZPR8:$Op2), (nxv16i8 ZPR8:$Op3),
+                         (i32 complexrotateop:$imm))),
+            (!cast<Instruction>(NAME # "_S") ZPR32:$Op1, ZPR8:$Op2, ZPR8:$Op3, complexrotateop:$imm)>;
+  def : Pat<(nxv2i64 (op (nxv2i64 ZPR64:$Op1), (nxv8i16 ZPR16:$Op2), (nxv8i16 ZPR16:$Op3),
+                         (i32 complexrotateop:$imm))),
+            (!cast<Instruction>(NAME # "_D") ZPR64:$Op1, ZPR16:$Op2, ZPR16:$Op3, complexrotateop:$imm)>;
 }
 
 //===----------------------------------------------------------------------===//
@@ -2580,19 +2587,26 @@
   let ElementSize = ElementSizeNone;
 }
 
-multiclass sve2_cintx_dot_by_indexed_elem<string asm> {
-  def _S : sve2_complex_int_arith_indexed<0b10, 0b0100, asm, ZPR32, ZPR8, ZPR3b8, VectorIndexS> {
+multiclass sve2_cintx_dot_by_indexed_elem<string asm, SDPatternOperator op> {
+  def _S : sve2_complex_int_arith_indexed<0b10, 0b0100, asm, ZPR32, ZPR8, ZPR3b8, VectorIndexS32b> {
     bits<2> iop;
     bits<3> Zm;
     let Inst{20-19} = iop;
     let Inst{18-16} = Zm;
   }
-  def _D : sve2_complex_int_arith_indexed<0b11, 0b0100, asm, ZPR64, ZPR16, ZPR4b16, VectorIndexD> {
+  def _D : sve2_complex_int_arith_indexed<0b11, 0b0100, asm, ZPR64, ZPR16, ZPR4b16, VectorIndexD32b> {
     bit iop;
     bits<4> Zm;
     let Inst{20} = iop;
     let Inst{19-16} = Zm;
   }
+
+  def : Pat<(nxv4i32 (op (nxv4i32 ZPR32:$Op1), (nxv16i8 ZPR8:$Op2), (nxv16i8 ZPR8:$Op3),
+                         (i32 VectorIndexS32b_timm:$idx), (i32 complexrotateop:$imm))),
+            (!cast<Instruction>(NAME # "_S") ZPR32:$Op1, ZPR8:$Op2, ZPR8:$Op3, VectorIndexS32b_timm:$idx, complexrotateop:$imm)>;
+  def : Pat<(nxv2i64 (op (nxv2i64 ZPR64:$Op1), (nxv8i16 ZPR16:$Op2), (nxv8i16 ZPR16:$Op3),
+                         (i32 VectorIndexD32b_timm:$idx), (i32 complexrotateop:$imm))),
+            (!cast<Instruction>(NAME # "_D") ZPR64:$Op1, ZPR16:$Op2, ZPR16:$Op3, VectorIndexD32b_timm:$idx, complexrotateop:$imm)>;
 }
 
 //===----------------------------------------------------------------------===//
Index: llvm/test/CodeGen/AArch64/sve2-intrinsics-complex-dot.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/AArch64/sve2-intrinsics-complex-dot.ll
@@ -0,0 +1,61 @@
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve2 < %s | FileCheck %s
+
+
+;
+; CDOT
+;
+
+define <vscale x 4 x i32> @cdot_s(<vscale x 4 x i32> %a, <vscale x 16 x i8> %b, <vscale x 16 x i8> %c) {
+; CHECK-LABEL: cdot_s:
+; CHECK: cdot z0.s, z1.b, z2.b, #0
+; CHECK-NEXT: ret
+  %out = call <vscale x 4 x i32> @llvm.aarch64.sve.cdot.nxv4i32(<vscale x 4 x i32> %a,
+                                                                <vscale x 16 x i8> %b,
+                                                                <vscale x 16 x i8> %c,
+                                                                i32 0)
+  ret <vscale x 4 x i32> %out
+}
+
+define <vscale x 2 x i64> @cdot_d(<vscale x 2 x i64> %a, <vscale x 8 x i16> %b, <vscale x 8 x i16> %c) {
+; CHECK-LABEL: cdot_d:
+; CHECK: cdot z0.d, z1.h, z2.h, #90
+; CHECK-NEXT: ret
+  %out = call <vscale x 2 x i64> @llvm.aarch64.sve.cdot.nxv2i64(<vscale x 2 x i64> %a,
+                                                                <vscale x 8 x i16> %b,
+                                                                <vscale x 8 x i16> %c,
+                                                                i32 90)
+  ret <vscale x 2 x i64> %out
+}
+
+;
+; CDOT(indexed)
+;
+
+define <vscale x 4 x i32> @cdot_s_idx(<vscale x 4 x i32> %a, <vscale x 16 x i8> %b, <vscale x 16 x i8> %c) {
+; CHECK-LABEL: cdot_s_idx:
+; CHECK: cdot z0.s, z1.b, z2.b[0], #180
+; CHECK-NEXT: ret
+  %out = call <vscale x 4 x i32> @llvm.aarch64.sve.cdot.lane.nxv4i32(<vscale x 4 x i32> %a,
+                                                                     <vscale x 16 x i8> %b,
+                                                                     <vscale x 16 x i8> %c,
+                                                                     i32 0, i32 180)
+  ret <vscale x 4 x i32> %out
+}
+
+
+define <vscale x 2 x i64> @cdot_d_idx(<vscale x 2 x i64> %a, <vscale x 8 x i16> %b, <vscale x 8 x i16> %c) {
+; CHECK-LABEL: cdot_d_idx:
+; CHECK: cdot z0.d, z1.h, z2.h[1], #270
+; CHECK-NEXT: ret
+  %out = call <vscale x 2 x i64> @llvm.aarch64.sve.cdot.lane.nxv2i64(<vscale x 2 x i64> %a,
+                                                                     <vscale x 8 x i16> %b,
+                                                                     <vscale x 8 x i16> %c,
+                                                                     i32 1, i32 270)
+  ret <vscale x 2 x i64> %out
+}
+
+
+declare <vscale x 4 x i32> @llvm.aarch64.sve.cdot.nxv4i32(<vscale x 4 x i32>, <vscale x 16 x i8>, <vscale x 16 x i8>, i32)
+declare <vscale x 2 x i64> @llvm.aarch64.sve.cdot.nxv2i64(<vscale x 2 x i64>, <vscale x 8 x i16>, <vscale x 8 x i16>, i32)
+declare <vscale x 4 x i32> @llvm.aarch64.sve.cdot.lane.nxv4i32(<vscale x 4 x i32>, <vscale x 16 x i8>, <vscale x 16 x i8>, i32, i32)
+declare <vscale x 2 x i64> @llvm.aarch64.sve.cdot.lane.nxv2i64(<vscale x 2 x i64>, <vscale x 8 x i16>, <vscale x 8 x i16>, i32, i32)