Index: llvm/include/llvm/Target/TargetSelectionDAG.td
===================================================================
--- llvm/include/llvm/Target/TargetSelectionDAG.td
+++ llvm/include/llvm/Target/TargetSelectionDAG.td
@@ -419,6 +419,8 @@
 def insertelt  : SDNode<"ISD::INSERT_VECTOR_ELT", SDTVecInsert>;
 
 def vecreduce_add  : SDNode<"ISD::VECREDUCE_ADD", SDTVecReduce>;
+def vecreduce_smax  : SDNode<"ISD::VECREDUCE_SMAX", SDTVecReduce>;
+def vecreduce_umax  : SDNode<"ISD::VECREDUCE_UMAX", SDTVecReduce>;
 
 def fadd       : SDNode<"ISD::FADD"       , SDTFPBinOp, [SDNPCommutative]>;
 def fsub       : SDNode<"ISD::FSUB"       , SDTFPBinOp>;
Index: llvm/lib/Target/ARM/ARMISelLowering.cpp
===================================================================
--- llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -269,6 +269,8 @@
 
     // Vector reductions
     setOperationAction(ISD::VECREDUCE_ADD, VT, Legal);
+    setOperationAction(ISD::VECREDUCE_SMAX, VT, Legal);
+    setOperationAction(ISD::VECREDUCE_UMAX, VT, Legal);
 
     if (!HasMVEFP) {
       setOperationAction(ISD::SINT_TO_FP, VT, Expand);
Index: llvm/lib/Target/ARM/ARMInstrMVE.td
===================================================================
--- llvm/lib/Target/ARM/ARMInstrMVE.td
+++ llvm/lib/Target/ARM/ARMInstrMVE.td
@@ -667,6 +667,22 @@
 defm MVE_VMINV : MVE_VMINMAXV_ty<"vminv", 0b1>;
 defm MVE_VMAXV : MVE_VMINMAXV_ty<"vmaxv", 0b0>;
 
+let Predicates = [HasMVEInt] in {
+  def : Pat<(i32 (vecreduce_smax (v16i8 MQPR:$src))),
+            (i32 (MVE_VMAXVs8 (t2MVNi (i32 127)), $src))>;
+  def : Pat<(i32 (vecreduce_smax (v8i16 MQPR:$src))),
+            (i32 (MVE_VMAXVs16 (t2MOVi32imm (i32 -32768)), $src))>;
+  def : Pat<(i32 (vecreduce_smax (v4i32 MQPR:$src))),
+            (i32 (MVE_VMAXVs32 (t2MOVi (i32 -2147483648)), $src))>;
+  def : Pat<(i32 (vecreduce_umax (v16i8 MQPR:$src))),
+            (i32 (MVE_VMAXVu8 (t2MOVi (i32 0)), $src))>;
+  def : Pat<(i32 (vecreduce_umax (v8i16 MQPR:$src))),
+            (i32 (MVE_VMAXVu16 (t2MOVi (i32 0)), $src))>;
+  def : Pat<(i32 (vecreduce_umax (v4i32 MQPR:$src))),
+            (i32 (MVE_VMAXVu32 (t2MOVi (i32 0)), $src))>;
+
+}
+
 multiclass MVE_VMINMAXAV_ty<string iname, bit bit_7, list<dag> pattern=[]> {
   def s8  : MVE_VMINMAXV<iname, "s8",  0b0, 0b00, 0b0, bit_7>;
   def s16 : MVE_VMINMAXV<iname, "s16", 0b0, 0b01, 0b0, bit_7>;
Index: llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
===================================================================
--- llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
+++ llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
@@ -1059,11 +1059,11 @@
   case Instruction::Or:
   case Instruction::Xor:
   case Instruction::Mul:
-  case Instruction::ICmp:
   case Instruction::FCmp:
     return false;
+  case Instruction::ICmp:
   case Instruction::Add:
-    return ScalarBits * Ty->getVectorNumElements() == 128;
+    return ScalarBits < 64 && ScalarBits * Ty->getVectorNumElements() == 128;
   default:
     llvm_unreachable("Unhandled reduction opcode");
   }
Index: llvm/test/CodeGen/Thumb2/mve-vmaxv.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/Thumb2/mve-vmaxv.ll
@@ -0,0 +1,69 @@
+; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+mve.fp %s -o - | FileCheck %s
+
+declare i8 @llvm.experimental.vector.reduce.smax.v16i8(<16 x i8>)
+declare i16 @llvm.experimental.vector.reduce.smax.v8i16(<8 x i16>)
+declare i32 @llvm.experimental.vector.reduce.smax.v4i32(<4 x i32>)
+declare i8 @llvm.experimental.vector.reduce.umax.v16i8(<16 x i8>)
+declare i16 @llvm.experimental.vector.reduce.umax.v8i16(<8 x i16>)
+declare i32 @llvm.experimental.vector.reduce.umax.v4i32(<4 x i32>)
+
+define arm_aapcs_vfpcc i8 @vmaxv_s_v16i8_i32(<16 x i8> %s1) {
+; CHECK-LABEL: vmaxv_s_v16i8_i32:
+; CHECK:       @ %bb.0:
+; CHECK-NEXT:    mvn r0, #127
+; CHECK-NEXT:    vmaxv.s8 r0, q0
+; CHECK-NEXT:    bx lr
+  %r = call i8 @llvm.experimental.vector.reduce.smax.v16i8(<16 x i8> %s1)
+  ret i8 %r
+}
+
+define arm_aapcs_vfpcc i16 @vmaxv_s_v8i16_i32(<8 x i16> %s1) {
+; CHECK-LABEL: vmaxv_s_v8i16_i32:
+; CHECK:       @ %bb.0:
+; CHECK-NEXT:    movw r0, #32768
+; CHECK-NEXT:    movt r0, #65535
+; CHECK-NEXT:    vmaxv.s16 r0, q0
+; CHECK-NEXT:    bx lr
+  %r = call i16 @llvm.experimental.vector.reduce.smax.v8i16(<8 x i16> %s1)
+  ret i16 %r
+}
+
+define arm_aapcs_vfpcc i32 @vmaxv_s_v4i32_i32(<4 x i32> %s1) {
+; CHECK-LABEL: vmaxv_s_v4i32_i32:
+; CHECK:       @ %bb.0:
+; CHECK-NEXT:    mov.w r0, #-2147483648
+; CHECK-NEXT:    vmaxv.s32 r0, q0
+; CHECK-NEXT:    bx lr
+  %r = call i32 @llvm.experimental.vector.reduce.smax.v4i32(<4 x i32> %s1)
+  ret i32 %r
+}
+
+define arm_aapcs_vfpcc i8 @vmaxv_u_v16i8_i32(<16 x i8> %s1) {
+; CHECK-LABEL: vmaxv_u_v16i8_i32:
+; CHECK:       @ %bb.0:
+; CHECK-NEXT:    movs r0, #0
+; CHECK-NEXT:    vmaxv.u8 r0, q0
+; CHECK-NEXT:    bx lr
+  %r = call i8 @llvm.experimental.vector.reduce.umax.v16i8(<16 x i8> %s1)
+  ret i8 %r
+}
+
+define arm_aapcs_vfpcc i16 @vmaxv_u_v8i16_i32(<8 x i16> %s1) {
+; CHECK-LABEL: vmaxv_u_v8i16_i32:
+; CHECK:       @ %bb.0:
+; CHECK-NEXT:    movs r0, #0
+; CHECK-NEXT:    vmaxv.u16 r0, q0
+; CHECK-NEXT:    bx lr
+  %r = call i16 @llvm.experimental.vector.reduce.umax.v8i16(<8 x i16> %s1)
+  ret i16 %r
+}
+
+define arm_aapcs_vfpcc i32 @vmaxv_u_v4i32_i32(<4 x i32> %s1) {
+; CHECK-LABEL: vmaxv_u_v4i32_i32:
+; CHECK:       @ %bb.0:
+; CHECK-NEXT:    movs r0, #0
+; CHECK-NEXT:    vmaxv.u32 r0, q0
+; CHECK-NEXT:    bx lr
+  %r = call i32 @llvm.experimental.vector.reduce.umax.v4i32(<4 x i32> %s1)
+  ret i32 %r
+}