Index: include/llvm/IR/IntrinsicsAArch64.td
===================================================================
--- include/llvm/IR/IntrinsicsAArch64.td
+++ include/llvm/IR/IntrinsicsAArch64.td
@@ -748,3 +748,22 @@
                           Intrinsic<[llvm_i64_ty], [],
                                     [IntrNoMem, IntrHasSideEffects]>;
 }
+
+//===----------------------------------------------------------------------===//
+// SVE
+
+let TargetPrefix = "aarch64" in {  // All intrinsics start with "llvm.aarch64.".
+  class AdvSIMD_Merged1VectorArg_Intrinsic
+    : Intrinsic<[llvm_anyvector_ty],
+                [LLVMMatchType<0>,
+                 LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>,
+                 LLVMMatchType<0>],
+                [IntrNoMem]>;
+}
+
+//
+// Integer arithmetic
+//
+
+def int_aarch64_sve_abs : AdvSIMD_Merged1VectorArg_Intrinsic;
+def int_aarch64_sve_neg : AdvSIMD_Merged1VectorArg_Intrinsic;
Index: lib/Target/AArch64/AArch64SVEInstrInfo.td
===================================================================
--- lib/Target/AArch64/AArch64SVEInstrInfo.td
+++ lib/Target/AArch64/AArch64SVEInstrInfo.td
@@ -94,8 +94,8 @@
   defm UXTH_ZPmZ : sve_int_un_pred_arit_0_w<0b011, "uxth">;
   defm SXTW_ZPmZ : sve_int_un_pred_arit_0_d<0b100, "sxtw">;
   defm UXTW_ZPmZ : sve_int_un_pred_arit_0_d<0b101, "uxtw">;
-  defm ABS_ZPmZ  : sve_int_un_pred_arit_0<  0b110, "abs">;
-  defm NEG_ZPmZ  : sve_int_un_pred_arit_0<  0b111, "neg">;
+  defm ABS_ZPmZ  : sve_int_un_pred_arit_0<  0b110, "abs", int_aarch64_sve_abs>;
+  defm NEG_ZPmZ  : sve_int_un_pred_arit_0<  0b111, "neg", int_aarch64_sve_neg>;
 
   defm CLS_ZPmZ  : sve_int_un_pred_arit_1<   0b000, "cls">;
   defm CLZ_ZPmZ  : sve_int_un_pred_arit_1<   0b001, "clz">;
Index: lib/Target/AArch64/SVEInstrFormats.td
===================================================================
--- lib/Target/AArch64/SVEInstrFormats.td
+++ lib/Target/AArch64/SVEInstrFormats.td
@@ -279,6 +279,14 @@
   defm PTRUES : sve_int_ptrue<0b001, "ptrues">;
 }
 
+//===----------------------------------------------------------------------===//
+// SVE pattern match helpers.
+//===----------------------------------------------------------------------===//
+
+class SVE_3_Op_Pat<ValueType vtd, SDPatternOperator op, ValueType vt1,
+                   ValueType vt2, ValueType vt3, Instruction inst>
+: Pat<(vtd (op vt1:$Op1, vt2:$Op2, vt3:$Op3)),
+      (inst $Op1, $Op2, $Op3)>;
 
 //===----------------------------------------------------------------------===//
 // SVE Predicate Misc Group
@@ -2835,11 +2843,17 @@
   let ElementSize = zprty.ElementSize;
 }
 
-multiclass sve_int_un_pred_arit_0<bits<3> opc, string asm> {
+multiclass sve_int_un_pred_arit_0<bits<3> opc, string asm,
+                                  SDPatternOperator op> {
   def _B : sve_int_un_pred_arit<0b00, { opc, 0b0 }, asm, ZPR8>;
   def _H : sve_int_un_pred_arit<0b01, { opc, 0b0 }, asm, ZPR16>;
   def _S : sve_int_un_pred_arit<0b10, { opc, 0b0 }, asm, ZPR32>;
   def _D : sve_int_un_pred_arit<0b11, { opc, 0b0 }, asm, ZPR64>;
+
+  def : SVE_3_Op_Pat<nxv16i8, op, nxv16i8, nxv16i1, nxv16i8, !cast<Instruction>(NAME # _B)>;
+  def : SVE_3_Op_Pat<nxv8i16, op, nxv8i16, nxv8i1,  nxv8i16, !cast<Instruction>(NAME # _H)>;
+  def : SVE_3_Op_Pat<nxv4i32, op, nxv4i32, nxv4i1,  nxv4i32, !cast<Instruction>(NAME # _S)>;
+  def : SVE_3_Op_Pat<nxv2i64, op, nxv2i64, nxv2i1,  nxv2i64, !cast<Instruction>(NAME # _D)>;
 }
 
 multiclass sve_int_un_pred_arit_0_h<bits<3> opc, string asm> {
Index: test/CodeGen/AArch64/sve-intrinsics-int-arith.ll
===================================================================
--- /dev/null
+++ test/CodeGen/AArch64/sve-intrinsics-int-arith.ll
@@ -0,0 +1,99 @@
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve < %s | FileCheck %s
+
+;
+; ABS
+;
+
+define <vscale x 16 x i8> @abs_i8(<vscale x 16 x i8> %a, <vscale x 16 x i1> %pg, <vscale x 16 x i8> %b) {
+; CHECK-LABEL: abs_i8:
+; CHECK: abs z0.b, p0/m, z1.b
+; CHECK-NEXT: ret
+  %out = call <vscale x 16 x i8> @llvm.aarch64.sve.abs.nxv16i8(<vscale x 16 x i8> %a,
+                                                               <vscale x 16 x i1> %pg,
+                                                               <vscale x 16 x i8> %b)
+  ret <vscale x 16 x i8> %out
+}
+
+define <vscale x 8 x i16> @abs_i16(<vscale x 8 x i16> %a, <vscale x 8 x i1> %pg, <vscale x 8 x i16> %b) {
+; CHECK-LABEL: abs_i16:
+; CHECK: abs z0.h, p0/m, z1.h
+; CHECK-NEXT: ret
+  %out = call <vscale x 8 x i16> @llvm.aarch64.sve.abs.nxv8i16(<vscale x 8 x i16> %a,
+                                                               <vscale x 8 x i1> %pg,
+                                                               <vscale x 8 x i16> %b)
+  ret <vscale x 8 x i16> %out
+}
+
+define <vscale x 4 x i32> @abs_i32(<vscale x 4 x i32> %a, <vscale x 4 x i1> %pg, <vscale x 4 x i32> %b) {
+; CHECK-LABEL: abs_i32:
+; CHECK: abs z0.s, p0/m, z1.s
+; CHECK-NEXT: ret
+  %out = call <vscale x 4 x i32> @llvm.aarch64.sve.abs.nxv4i32(<vscale x 4 x i32> %a,
+                                                               <vscale x 4 x i1> %pg,
+                                                               <vscale x 4 x i32> %b)
+  ret <vscale x 4 x i32> %out
+}
+
+define <vscale x 2 x i64> @abs_i64(<vscale x 2 x i64> %a, <vscale x 2 x i1> %pg, <vscale x 2 x i64> %b) {
+; CHECK-LABEL: abs_i64:
+; CHECK: abs z0.d, p0/m, z1.d
+; CHECK-NEXT: ret
+  %out = call <vscale x 2 x i64> @llvm.aarch64.sve.abs.nxv2i64(<vscale x 2 x i64> %a,
+                                                               <vscale x 2 x i1> %pg,
+                                                               <vscale x 2 x i64> %b)
+  ret <vscale x 2 x i64> %out
+}
+
+;
+; NEG
+;
+
+define <vscale x 16 x i8> @neg_i8(<vscale x 16 x i8> %a, <vscale x 16 x i1> %pg, <vscale x 16 x i8> %b) {
+; CHECK-LABEL: neg_i8:
+; CHECK: neg z0.b, p0/m, z1.b
+; CHECK-NEXT: ret
+  %out = call <vscale x 16 x i8> @llvm.aarch64.sve.neg.nxv16i8(<vscale x 16 x i8> %a,
+                                                               <vscale x 16 x i1> %pg,
+                                                               <vscale x 16 x i8> %b)
+  ret <vscale x 16 x i8> %out
+}
+
+define <vscale x 8 x i16> @neg_i16(<vscale x 8 x i16> %a, <vscale x 8 x i1> %pg, <vscale x 8 x i16> %b) {
+; CHECK-LABEL: neg_i16:
+; CHECK: neg z0.h, p0/m, z1.h
+; CHECK-NEXT: ret
+  %out = call <vscale x 8 x i16> @llvm.aarch64.sve.neg.nxv8i16(<vscale x 8 x i16> %a,
+                                                               <vscale x 8 x i1> %pg,
+                                                               <vscale x 8 x i16> %b)
+  ret <vscale x 8 x i16> %out
+}
+
+define <vscale x 4 x i32> @neg_i32(<vscale x 4 x i32> %a, <vscale x 4 x i1> %pg, <vscale x 4 x i32> %b) {
+; CHECK-LABEL: neg_i32:
+; CHECK: neg z0.s, p0/m, z1.s
+; CHECK-NEXT: ret
+  %out = call <vscale x 4 x i32> @llvm.aarch64.sve.neg.nxv4i32(<vscale x 4 x i32> %a,
+                                                               <vscale x 4 x i1> %pg,
+                                                               <vscale x 4 x i32> %b)
+  ret <vscale x 4 x i32> %out
+}
+
+define <vscale x 2 x i64> @neg_i64(<vscale x 2 x i64> %a, <vscale x 2 x i1> %pg, <vscale x 2 x i64> %b) {
+; CHECK-LABEL: neg_i64:
+; CHECK: neg z0.d, p0/m, z1.d
+; CHECK-NEXT: ret
+  %out = call <vscale x 2 x i64> @llvm.aarch64.sve.neg.nxv2i64(<vscale x 2 x i64> %a,
+                                                               <vscale x 2 x i1> %pg,
+                                                               <vscale x 2 x i64> %b)
+  ret <vscale x 2 x i64> %out
+}
+
+declare <vscale x 16 x i8> @llvm.aarch64.sve.abs.nxv16i8(<vscale x 16 x i8>, <vscale x 16 x i1>, <vscale x 16 x i8>)
+declare <vscale x 8 x i16> @llvm.aarch64.sve.abs.nxv8i16(<vscale x 8 x i16>, <vscale x 8 x i1>, <vscale x 8 x i16>)
+declare <vscale x 4 x i32> @llvm.aarch64.sve.abs.nxv4i32(<vscale x 4 x i32>, <vscale x 4 x i1>, <vscale x 4 x i32>)
+declare <vscale x 2 x i64> @llvm.aarch64.sve.abs.nxv2i64(<vscale x 2 x i64>, <vscale x 2 x i1>, <vscale x 2 x i64>)
+
+declare <vscale x 16 x i8> @llvm.aarch64.sve.neg.nxv16i8(<vscale x 16 x i8>, <vscale x 16 x i1>, <vscale x 16 x i8>)
+declare <vscale x 8 x i16> @llvm.aarch64.sve.neg.nxv8i16(<vscale x 8 x i16>, <vscale x 8 x i1>, <vscale x 8 x i16>)
+declare <vscale x 4 x i32> @llvm.aarch64.sve.neg.nxv4i32(<vscale x 4 x i32>, <vscale x 4 x i1>, <vscale x 4 x i32>)
+declare <vscale x 2 x i64> @llvm.aarch64.sve.neg.nxv2i64(<vscale x 2 x i64>, <vscale x 2 x i1>, <vscale x 2 x i64>)