diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 93df88b..0b1c257 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -6822,6 +6822,14 @@
   EVT ShVT = getShiftAmountTy(VT, DAG.getDataLayout());
   SDValue Op = N->getOperand(0);
 
+  // abs(x) -> smax(x,sub(0,x))
+  if (isOperationLegal(ISD::SUB, VT) && isOperationLegal(ISD::SMAX, VT)) {
+    SDValue Zero = DAG.getConstant(0, dl, VT);
+    Result = DAG.getNode(ISD::SMAX, dl, VT, Op,
+                         DAG.getNode(ISD::SUB, dl, VT, Zero, Op));
+    return true;
+  }
+
   // Only expand vector types if we have the appropriate vector operations.
   if (VT.isVector() && (!isOperationLegalOrCustom(ISD::SRA, VT) ||
                         !isOperationLegalOrCustom(ISD::ADD, VT) ||
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index d19fbd4..1f3ef3e 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -806,9 +806,6 @@
       setOperationAction(ISD::UMIN, MVT::v2i64, Expand);
     }
 
-    for (auto VT : {MVT::v2i64, MVT::v4i32, MVT::v8i16, MVT::v16i8})
-      setOperationAction(ISD::ABS, VT, Custom);
-
     // We can custom expand all VECTOR_SHUFFLEs to VPERM, others we can handle
     // with merges, splats, etc.
     setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v16i8, Custom);
@@ -841,11 +838,6 @@
     setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
     setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
 
-    // Without hasP8Altivec set, v2i64 SMAX isn't available.
-    // But ABS custom lowering requires SMAX support.
-    if (!Subtarget.hasP8Altivec())
-      setOperationAction(ISD::ABS, MVT::v2i64, Expand);
-
     // Custom lowering ROTL v1i128 to VECTOR_SHUFFLE v16i8.
     setOperationAction(ISD::ROTL, MVT::v1i128, Custom);
     // With hasAltivec set, we can lower ISD::ROTL to vrl(b|h|w).
@@ -10886,44 +10878,6 @@
   }
 }
 
-SDValue PPCTargetLowering::LowerABS(SDValue Op, SelectionDAG &DAG) const {
-
-  assert(Op.getOpcode() == ISD::ABS && "Should only be called for ISD::ABS");
-
-  EVT VT = Op.getValueType();
-  assert(VT.isVector() &&
-         "Only set vector abs as custom, scalar abs shouldn't reach here!");
-  assert((VT == MVT::v2i64 || VT == MVT::v4i32 || VT == MVT::v8i16 ||
-          VT == MVT::v16i8) &&
-         "Unexpected vector element type!");
-  assert((VT != MVT::v2i64 || Subtarget.hasP8Altivec()) &&
-         "Current subtarget doesn't support smax v2i64!");
-
-  // For vector abs, it can be lowered to:
-  // abs x
-  // ==>
-  // y = -x
-  // smax(x, y)
-
-  SDLoc dl(Op);
-  SDValue X = Op.getOperand(0);
-  SDValue Zero = DAG.getConstant(0, dl, VT);
-  SDValue Y = DAG.getNode(ISD::SUB, dl, VT, Zero, X);
-
-  // SMAX patch https://reviews.llvm.org/D47332
-  // hasn't landed yet, so use intrinsic first here.
-  // TODO: Should use SMAX directly once SMAX patch landed
-  Intrinsic::ID BifID = Intrinsic::ppc_altivec_vmaxsw;
-  if (VT == MVT::v2i64)
-    BifID = Intrinsic::ppc_altivec_vmaxsd;
-  else if (VT == MVT::v8i16)
-    BifID = Intrinsic::ppc_altivec_vmaxsh;
-  else if (VT == MVT::v16i8)
-    BifID = Intrinsic::ppc_altivec_vmaxsb;
-
-  return BuildIntrinsicOp(BifID, X, Y, DAG, dl, VT);
-}
-
 // Custom lowering for fpext vf32 to v2f64
 SDValue PPCTargetLowering::LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const {
 
@@ -11059,7 +11013,6 @@
   case ISD::SCALAR_TO_VECTOR:   return LowerSCALAR_TO_VECTOR(Op, DAG);
   case ISD::INSERT_VECTOR_ELT:  return LowerINSERT_VECTOR_ELT(Op, DAG);
   case ISD::MUL:                return LowerMUL(Op, DAG);
-  case ISD::ABS:                return LowerABS(Op, DAG);
   case ISD::FP_EXTEND:          return LowerFP_EXTEND(Op, DAG);
   case ISD::ROTL:               return LowerROTL(Op, DAG);
 
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.h b/llvm/lib/Target/PowerPC/PPCISelLowering.h
index 6c4899f..8fad97c 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.h
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.h
@@ -1157,7 +1157,6 @@
     SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) const;
-    SDValue LowerABS(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerROTL(SDValue Op, SelectionDAG &DAG) const;
 
diff --git a/llvm/test/CodeGen/X86/abs.ll b/llvm/test/CodeGen/X86/abs.ll
index 8e20b00..942f09f 100644
--- a/llvm/test/CodeGen/X86/abs.ll
+++ b/llvm/test/CodeGen/X86/abs.ll
@@ -397,10 +397,9 @@
 define <8 x i16> @test_v8i16(<8 x i16> %a) nounwind {
 ; SSE-LABEL: test_v8i16:
 ; SSE:       # %bb.0:
-; SSE-NEXT:    movdqa %xmm0, %xmm1
-; SSE-NEXT:    psraw $15, %xmm1
-; SSE-NEXT:    paddw %xmm1, %xmm0
-; SSE-NEXT:    pxor %xmm1, %xmm0
+; SSE-NEXT:    pxor %xmm1, %xmm1
+; SSE-NEXT:    psubw %xmm0, %xmm1
+; SSE-NEXT:    pmaxsw %xmm1, %xmm0
 ; SSE-NEXT:    retq
 ;
 ; AVX-LABEL: test_v8i16:
diff --git a/llvm/test/CodeGen/X86/combine-abs.ll b/llvm/test/CodeGen/X86/combine-abs.ll
index af399e3..da59da4 100644
--- a/llvm/test/CodeGen/X86/combine-abs.ll
+++ b/llvm/test/CodeGen/X86/combine-abs.ll
@@ -55,10 +55,9 @@
 define <8 x i16> @combine_v8i16_abs_abs(<8 x i16> %a) {
 ; SSE2-LABEL: combine_v8i16_abs_abs:
 ; SSE2:       # %bb.0:
-; SSE2-NEXT:    movdqa %xmm0, %xmm1
-; SSE2-NEXT:    psraw $15, %xmm1
-; SSE2-NEXT:    paddw %xmm1, %xmm0
-; SSE2-NEXT:    pxor %xmm1, %xmm0
+; SSE2-NEXT:    pxor %xmm1, %xmm1
+; SSE2-NEXT:    psubw %xmm0, %xmm1
+; SSE2-NEXT:    pmaxsw %xmm1, %xmm0
 ; SSE2-NEXT:    retq
 ;
 ; SSE42-LABEL: combine_v8i16_abs_abs:
diff --git a/llvm/test/CodeGen/X86/viabs.ll b/llvm/test/CodeGen/X86/viabs.ll
index 588246d..873dea2 100644
--- a/llvm/test/CodeGen/X86/viabs.ll
+++ b/llvm/test/CodeGen/X86/viabs.ll
@@ -88,10 +88,9 @@
 define <8 x i16> @test_abs_gt_v8i16(<8 x i16> %a) nounwind {
 ; SSE2-LABEL: test_abs_gt_v8i16:
 ; SSE2:       # %bb.0:
-; SSE2-NEXT:    movdqa %xmm0, %xmm1
-; SSE2-NEXT:    psraw $15, %xmm1
-; SSE2-NEXT:    paddw %xmm1, %xmm0
-; SSE2-NEXT:    pxor %xmm1, %xmm0
+; SSE2-NEXT:    pxor %xmm1, %xmm1
+; SSE2-NEXT:    psubw %xmm0, %xmm1
+; SSE2-NEXT:    pmaxsw %xmm1, %xmm0
 ; SSE2-NEXT:    retq
 ;
 ; SSSE3-LABEL: test_abs_gt_v8i16:
@@ -311,14 +310,12 @@
 define <16 x i16> @test_abs_gt_v16i16(<16 x i16> %a) nounwind {
 ; SSE2-LABEL: test_abs_gt_v16i16:
 ; SSE2:       # %bb.0:
-; SSE2-NEXT:    movdqa %xmm0, %xmm2
-; SSE2-NEXT:    psraw $15, %xmm2
-; SSE2-NEXT:    paddw %xmm2, %xmm0
-; SSE2-NEXT:    pxor %xmm2, %xmm0
-; SSE2-NEXT:    movdqa %xmm1, %xmm2
-; SSE2-NEXT:    psraw $15, %xmm2
-; SSE2-NEXT:    paddw %xmm2, %xmm1
-; SSE2-NEXT:    pxor %xmm2, %xmm1
+; SSE2-NEXT:    pxor %xmm2, %xmm2
+; SSE2-NEXT:    pxor %xmm3, %xmm3
+; SSE2-NEXT:    psubw %xmm0, %xmm3
+; SSE2-NEXT:    pmaxsw %xmm3, %xmm0
+; SSE2-NEXT:    psubw %xmm1, %xmm2
+; SSE2-NEXT:    pmaxsw %xmm2, %xmm1
 ; SSE2-NEXT:    retq
 ;
 ; SSSE3-LABEL: test_abs_gt_v16i16:
@@ -948,22 +945,18 @@
 define <32 x i16> @test_abs_gt_v32i16(<32 x i16> %a) nounwind {
 ; SSE2-LABEL: test_abs_gt_v32i16:
 ; SSE2:       # %bb.0:
-; SSE2-NEXT:    movdqa %xmm0, %xmm4
-; SSE2-NEXT:    psraw $15, %xmm4
-; SSE2-NEXT:    paddw %xmm4, %xmm0
-; SSE2-NEXT:    pxor %xmm4, %xmm0
-; SSE2-NEXT:    movdqa %xmm1, %xmm4
-; SSE2-NEXT:    psraw $15, %xmm4
-; SSE2-NEXT:    paddw %xmm4, %xmm1
-; SSE2-NEXT:    pxor %xmm4, %xmm1
-; SSE2-NEXT:    movdqa %xmm2, %xmm4
-; SSE2-NEXT:    psraw $15, %xmm4
-; SSE2-NEXT:    paddw %xmm4, %xmm2
-; SSE2-NEXT:    pxor %xmm4, %xmm2
-; SSE2-NEXT:    movdqa %xmm3, %xmm4
-; SSE2-NEXT:    psraw $15, %xmm4
-; SSE2-NEXT:    paddw %xmm4, %xmm3
-; SSE2-NEXT:    pxor %xmm4, %xmm3
+; SSE2-NEXT:    pxor %xmm4, %xmm4
+; SSE2-NEXT:    pxor %xmm5, %xmm5
+; SSE2-NEXT:    psubw %xmm0, %xmm5
+; SSE2-NEXT:    pmaxsw %xmm5, %xmm0
+; SSE2-NEXT:    pxor %xmm5, %xmm5
+; SSE2-NEXT:    psubw %xmm1, %xmm5
+; SSE2-NEXT:    pmaxsw %xmm5, %xmm1
+; SSE2-NEXT:    pxor %xmm5, %xmm5
+; SSE2-NEXT:    psubw %xmm2, %xmm5
+; SSE2-NEXT:    pmaxsw %xmm5, %xmm2
+; SSE2-NEXT:    psubw %xmm3, %xmm4
+; SSE2-NEXT:    pmaxsw %xmm4, %xmm3
 ; SSE2-NEXT:    retq
 ;
 ; SSSE3-LABEL: test_abs_gt_v32i16: