diff --git a/clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp b/clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp
index 5e807a091f7a..25aab790d59f 100644
--- a/clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenBuiltinAArch64.cpp
@@ -4397,9 +4397,6 @@ CIRGenFunction::emitAArch64BuiltinExpr(unsigned BuiltinID, const CallExpr *E,
   case NEON::BI__builtin_neon_vmul_n_f64: {
     llvm_unreachable("NEON::BI__builtin_neon_vmul_n_f64 NYI");
   }
-  case NEON::BI__builtin_neon_vaddlv_u8: {
-    llvm_unreachable("NEON::BI__builtin_neon_vaddlv_u8 NYI");
-  }
   case NEON::BI__builtin_neon_vaddlvq_u8: {
     llvm_unreachable("NEON::BI__builtin_neon_vaddlvq_u8 NYI");
   }
@@ -4413,8 +4410,16 @@ CIRGenFunction::emitAArch64BuiltinExpr(unsigned BuiltinID, const CallExpr *E,
                         usgn ? "aarch64.neon.uaddlv" : "aarch64.neon.saddlv",
                         usgn ? UInt32Ty : SInt32Ty, getLoc(E->getExprLoc()));
   }
+  case NEON::BI__builtin_neon_vaddlv_u8:
+    usgn = true;
+    [[fallthrough]];
   case NEON::BI__builtin_neon_vaddlv_s8: {
-    llvm_unreachable("NEON::BI__builtin_neon_vaddlv_s8 NYI");
+    cir::VectorType vTy = cir::VectorType::get(usgn ? UInt8Ty : SInt8Ty, 8);
+    Ops.push_back(emitScalarExpr(E->getArg(0)));
+    Ops[0] = emitNeonCall(builder, {vTy}, Ops,
+                          usgn ? "aarch64.neon.uaddlv" : "aarch64.neon.saddlv",
+                          usgn ? UInt32Ty : SInt32Ty, getLoc(E->getExprLoc()));
+    return builder.createIntCast(Ops[0], usgn ? UInt16Ty : SInt16Ty);
   }
   case NEON::BI__builtin_neon_vaddlv_u16:
     usgn = true;
diff --git a/clang/test/CIR/CodeGen/AArch64/neon-arith.c b/clang/test/CIR/CodeGen/AArch64/neon-arith.c
index ba2f2cb6958d..657ae11fabbf 100644
--- a/clang/test/CIR/CodeGen/AArch64/neon-arith.c
+++ b/clang/test/CIR/CodeGen/AArch64/neon-arith.c
@@ -905,6 +905,29 @@ int32_t test_vaddlvq_s16(int16x8_t a) {
   // LLVM: ret i32 [[VADDLV_I]]
 }
 
+int16_t test_vaddlv_s8(int8x8_t a) {
+  return vaddlv_s8(a);
+
+  // CIR-LABEL: vaddlv_s8
+  // CIR: cir.llvm.intrinsic "aarch64.neon.saddlv" {{%.*}}: (!cir.vector<!s8i x 8>) -> !s32i
+
+  // LLVM: {{.*}}test_vaddlv_s8(<8 x i8>{{.*}}[[A:%.*]])
+  // LLVM: [[VADDLV_I:%.*]] = call i32 @llvm.aarch64.neon.saddlv.i32.v8i8(<8 x i8> [[A]])
+  // LLVM-NEXT: [[TMP0:%.*]] = trunc i32 [[VADDLV_I]] to i16
+  // LLVM-NEXT: ret i16 [[TMP0]]
+}
+
+uint16_t test_vaddlv_u8(uint8x8_t a) {
+  return vaddlv_u8(a);
+
+  // CIR-LABEL: vaddlv_u8
+  // CIR: cir.llvm.intrinsic "aarch64.neon.uaddlv" {{%.*}}: (!cir.vector<!u8i x 8>) -> !u32i
+
+  // LLVM: {{.*}}test_vaddlv_u8(<8 x i8>{{.*}}[[A:%.*]])
+  // LLVM: [[VADDLV_I:%.*]] = call i32 @llvm.aarch64.neon.uaddlv.i32.v8i8(<8 x i8> [[A]])
+  // LLVM-NEXT: [[TMP0:%.*]] = trunc i32 [[VADDLV_I]] to i16
+  // LLVM-NEXT: ret i16 [[TMP0]]
+}
 
 int32_t test_vaddlv_s16(int16x4_t a) {
   return vaddlv_s16(a);