Index: llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
===================================================================
--- llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -1016,11 +1016,12 @@
     // Vector reductions
     for (MVT VT : { MVT::v4f16, MVT::v2f32,
                     MVT::v8f16, MVT::v4f32, MVT::v2f64 }) {
-      setOperationAction(ISD::VECREDUCE_FMAX, VT, Custom);
-      setOperationAction(ISD::VECREDUCE_FMIN, VT, Custom);
+      if (VT.getVectorElementType() != MVT::f16 || Subtarget->hasFullFP16()) {
+        setOperationAction(ISD::VECREDUCE_FMAX, VT, Custom);
+        setOperationAction(ISD::VECREDUCE_FMIN, VT, Custom);
 
-      if (VT.getVectorElementType() != MVT::f16 || Subtarget->hasFullFP16())
         setOperationAction(ISD::VECREDUCE_FADD, VT, Legal);
+      }
     }
     for (MVT VT : { MVT::v8i8, MVT::v4i16, MVT::v2i32,
                     MVT::v16i8, MVT::v8i16, MVT::v4i32 }) {
Index: llvm/test/CodeGen/AArch64/vecreduce-fmax-legalization.ll
===================================================================
--- llvm/test/CodeGen/AArch64/vecreduce-fmax-legalization.ll
+++ llvm/test/CodeGen/AArch64/vecreduce-fmax-legalization.ll
@@ -1,11 +1,13 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -mattr=+neon | FileCheck %s --check-prefix=CHECK
+; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -mattr=+neon | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NOFP
+; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -mattr=+neon,+fullfp16 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-FP
 
 declare half @llvm.vector.reduce.fmax.v1f16(<1 x half> %a)
 declare float @llvm.vector.reduce.fmax.v1f32(<1 x float> %a)
 declare double @llvm.vector.reduce.fmax.v1f64(<1 x double> %a)
 declare fp128 @llvm.vector.reduce.fmax.v1f128(<1 x fp128> %a)
 
+declare half @llvm.vector.reduce.fmax.v4f16(<4 x half> %a)
 declare float @llvm.vector.reduce.fmax.v3f32(<3 x float> %a)
 declare fp128 @llvm.vector.reduce.fmax.v2f128(<2 x fp128> %a)
 declare float @llvm.vector.reduce.fmax.v16f32(<16 x float> %a)
@@ -44,6 +46,64 @@
   ret fp128 %b
 }
 
+define half @test_v4f16(<4 x half> %a) nounwind {
+; CHECK-NOFP-LABEL: test_v4f16:
+; CHECK-NOFP:       // %bb.0:
+; CHECK-NOFP-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-NOFP-NEXT:    mov h3, v0.h[1]
+; CHECK-NOFP-NEXT:    mov h1, v0.h[3]
+; CHECK-NOFP-NEXT:    mov h2, v0.h[2]
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fcvt s3, h3
+; CHECK-NOFP-NEXT:    fmaxnm s0, s0, s3
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    fcvt s2, h2
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fmaxnm s0, s0, s2
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fcvt s1, h1
+; CHECK-NOFP-NEXT:    fmaxnm s0, s0, s1
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    ret
+;
+; CHECK-FP-LABEL: test_v4f16:
+; CHECK-FP:       // %bb.0:
+; CHECK-FP-NEXT:    fmaxnmv h0, v0.4h
+; CHECK-FP-NEXT:    ret
+  %b = call nnan half @llvm.vector.reduce.fmax.v4f16(<4 x half> %a)
+  ret half %b
+}
+
+define half @test_v4f16_ninf(<4 x half> %a) nounwind {
+; CHECK-NOFP-LABEL: test_v4f16_ninf:
+; CHECK-NOFP:       // %bb.0:
+; CHECK-NOFP-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-NOFP-NEXT:    mov h3, v0.h[1]
+; CHECK-NOFP-NEXT:    mov h1, v0.h[3]
+; CHECK-NOFP-NEXT:    mov h2, v0.h[2]
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fcvt s3, h3
+; CHECK-NOFP-NEXT:    fmaxnm s0, s0, s3
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    fcvt s2, h2
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fmaxnm s0, s0, s2
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fcvt s1, h1
+; CHECK-NOFP-NEXT:    fmaxnm s0, s0, s1
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    ret
+;
+; CHECK-FP-LABEL: test_v4f16_ninf:
+; CHECK-FP:       // %bb.0:
+; CHECK-FP-NEXT:    fmaxnmv h0, v0.4h
+; CHECK-FP-NEXT:    ret
+  %b = call nnan ninf half @llvm.vector.reduce.fmax.v4f16(<4 x half> %a)
+  ret half %b
+}
+
 define float @test_v3f32(<3 x float> %a) nounwind {
 ; CHECK-LABEL: test_v3f32:
 ; CHECK:       // %bb.0:
Index: llvm/test/CodeGen/AArch64/vecreduce-fmin-legalization.ll
===================================================================
--- llvm/test/CodeGen/AArch64/vecreduce-fmin-legalization.ll
+++ llvm/test/CodeGen/AArch64/vecreduce-fmin-legalization.ll
@@ -1,11 +1,13 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -mattr=+neon | FileCheck %s --check-prefix=CHECK
+; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -mattr=+neon | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NOFP
+; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -mattr=+neon,+fullfp16 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-FP
 
 declare half @llvm.vector.reduce.fmin.v1f16(<1 x half> %a)
 declare float @llvm.vector.reduce.fmin.v1f32(<1 x float> %a)
 declare double @llvm.vector.reduce.fmin.v1f64(<1 x double> %a)
 declare fp128 @llvm.vector.reduce.fmin.v1f128(<1 x fp128> %a)
 
+declare half @llvm.vector.reduce.fmin.v4f16(<4 x half> %a)
 declare float @llvm.vector.reduce.fmin.v3f32(<3 x float> %a)
 declare fp128 @llvm.vector.reduce.fmin.v2f128(<2 x fp128> %a)
 declare float @llvm.vector.reduce.fmin.v16f32(<16 x float> %a)
@@ -44,6 +46,64 @@
   ret fp128 %b
 }
 
+define half @test_v4f16(<4 x half> %a) nounwind {
+; CHECK-NOFP-LABEL: test_v4f16:
+; CHECK-NOFP:       // %bb.0:
+; CHECK-NOFP-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-NOFP-NEXT:    mov h3, v0.h[1]
+; CHECK-NOFP-NEXT:    mov h1, v0.h[3]
+; CHECK-NOFP-NEXT:    mov h2, v0.h[2]
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fcvt s3, h3
+; CHECK-NOFP-NEXT:    fminnm s0, s0, s3
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    fcvt s2, h2
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fminnm s0, s0, s2
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fcvt s1, h1
+; CHECK-NOFP-NEXT:    fminnm s0, s0, s1
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    ret
+;
+; CHECK-FP-LABEL: test_v4f16:
+; CHECK-FP:       // %bb.0:
+; CHECK-FP-NEXT:    fminnmv h0, v0.4h
+; CHECK-FP-NEXT:    ret
+  %b = call nnan half @llvm.vector.reduce.fmin.v4f16(<4 x half> %a)
+  ret half %b
+}
+
+define half @test_v4f16_ninf(<4 x half> %a) nounwind {
+; CHECK-NOFP-LABEL: test_v4f16_ninf:
+; CHECK-NOFP:       // %bb.0:
+; CHECK-NOFP-NEXT:    // kill: def $d0 killed $d0 def $q0
+; CHECK-NOFP-NEXT:    mov h3, v0.h[1]
+; CHECK-NOFP-NEXT:    mov h1, v0.h[3]
+; CHECK-NOFP-NEXT:    mov h2, v0.h[2]
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fcvt s3, h3
+; CHECK-NOFP-NEXT:    fminnm s0, s0, s3
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    fcvt s2, h2
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fminnm s0, s0, s2
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    fcvt s0, h0
+; CHECK-NOFP-NEXT:    fcvt s1, h1
+; CHECK-NOFP-NEXT:    fminnm s0, s0, s1
+; CHECK-NOFP-NEXT:    fcvt h0, s0
+; CHECK-NOFP-NEXT:    ret
+;
+; CHECK-FP-LABEL: test_v4f16_ninf:
+; CHECK-FP:       // %bb.0:
+; CHECK-FP-NEXT:    fminnmv h0, v0.4h
+; CHECK-FP-NEXT:    ret
+  %b = call nnan ninf half @llvm.vector.reduce.fmin.v4f16(<4 x half> %a)
+  ret half %b
+}
+
 define float @test_v3f32(<3 x float> %a) nounwind {
 ; CHECK-LABEL: test_v3f32:
 ; CHECK:       // %bb.0: