diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.h b/llvm/lib/Target/PowerPC/PPCISelLowering.h
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.h
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.h
@@ -873,6 +873,8 @@
     SDValue expandVSXLoadForLE(SDNode *N, DAGCombinerInfo &DCI) const;
     SDValue expandVSXStoreForLE(SDNode *N, DAGCombinerInfo &DCI) const;
 
+    SDValue findAndReuseSplatForConst(SDNode *N, DAGCombinerInfo &DCI) const;
+
     SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
 
     SDValue BuildSDIVPow2(SDNode *N, const APInt &Divisor, SelectionDAG &DAG,
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -15038,6 +15038,125 @@
   return Store;
 }
 
+// Search for opportunity that store constant int/fp shares the same chain with
+// another store constant vector, which is a splat of first store's constant.
+// Convert the first store into store vector element.
+SDValue
+PPCTargetLowering::findAndReuseSplatForConst(SDNode *N,
+                                             DAGCombinerInfo &DCI) const {
+  StoreSDNode *ST = cast<StoreSDNode>(N);
+  // Truncated stores are likely simple constants. Stores that return values are
+  // out-of-scope. Do not bother reuse.
+  if (ST->isTruncatingStore() || ST->getNumValues() != 1)
+    return SDValue();
+
+  EVT StoreVT = ST->getValue().getValueType();
+  if (!StoreVT.isSimple() || StoreVT.isVector())
+    return SDValue();
+  if (!(StoreVT.isScalarInteger() || StoreVT.isFloatingPoint()))
+    return SDValue();
+  // Expect Byte/Halfword/Word/Doubleword size, and check for supported
+  // subtarget.
+  auto StoreSizeInBits = ST->getMemoryVT().getSizeInBits();
+  if (!llvm::isPowerOf2_64(StoreSizeInBits) || StoreSizeInBits > 64 ||
+      StoreSizeInBits < 8)
+    return SDValue();
+  if (StoreSizeInBits == 32 && !Subtarget.hasP8Vector())
+    return SDValue();
+  if ((StoreSizeInBits == 16 || StoreSizeInBits == 8) &&
+      !Subtarget.hasP9Vector())
+    return SDValue();
+
+  APInt ConstVal;
+  if (auto *Const = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
+    ConstVal = Const->getAPIntValue();
+  } else if (auto *Const = dyn_cast<ConstantFPSDNode>(N->getOperand(1))) {
+    ConstVal = Const->getValueAPF().bitcastToAPInt();
+  } else
+    return SDValue();
+  if (ConstVal.isZero() || ConstVal.isAllOnes())
+    return SDValue();
+  if (ConstVal.getBitWidth() != StoreSizeInBits)
+    return SDValue();
+
+  SelectionDAG &DAG = DCI.DAG;
+  SDLoc dl(N);
+
+  SDValue Chain = ST->getChain();
+  SDValue Base = ST->getBasePtr();
+  MachineMemOperand *MMO = ST->getMemOperand();
+
+  unsigned NumNodesExplored = 0;
+  const unsigned MaxSearchNodes = 3;
+  SDNode *RootNode = Chain.getNode();
+  for (auto I = RootNode->use_begin(), E = RootNode->use_end();
+       I != E && NumNodesExplored < MaxSearchNodes; ++I, ++NumNodesExplored) {
+    if (*I == N)
+      continue;
+
+    auto *OtherStore = dyn_cast<StoreSDNode>(*I);
+    if (!OtherStore)
+      continue;
+
+    SDValue OtherStoredVal = peekThroughBitcasts(OtherStore->getValue());
+    APInt SplatVal;
+    if (!isTypeLegal(OtherStoredVal.getValueType()) ||
+        !ISD::isConstantSplatVector(OtherStoredVal.getNode(), SplatVal))
+      continue;
+
+    // Check that the longer of (ConstVal/SplatVal) shall be splat of the
+    // shorter to allow reuse.
+    APInt ShorterVal = SplatVal;
+    APInt LongerVal = ConstVal;
+    if (ShorterVal.getBitWidth() > LongerVal.getBitWidth())
+      std::swap(ShorterVal, LongerVal);
+    if (LongerVal.trunc(ShorterVal.getBitWidth()) != ShorterVal)
+      continue;
+    if (LongerVal.getBitWidth() % ShorterVal.getBitWidth() != 0)
+      continue;
+    if (!LongerVal.isSplat(ShorterVal.getBitWidth()))
+      continue;
+
+    // Element type shall be f64 as expected by STXSIX and STFIWX, and the type
+    // should be reversed for extract_vector_elt from v2*64 types to allow
+    // extract_vector_elt node.
+    EVT ElemTy = EVT::getFloatingPointVT(64);
+    if (StoreSizeInBits == 64 && StoreVT.isFloatingPoint())
+      ElemTy = EVT::getIntegerVT(*DAG.getContext(), 64);
+
+    EVT VecTy = EVT::getVectorVT(*DAG.getContext(), ElemTy, 2);
+    SDValue Tmp1 = DAG.getNode(ISD::BITCAST, dl, VecTy, OtherStore->getValue());
+    if (Tmp1.getOpcode() != ISD::BITCAST)
+      continue;
+
+    unsigned ElemIdx = Subtarget.isLittleEndian() ? 1 : 0;
+    SDValue Tmp2 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ElemTy, Tmp1,
+                               DAG.getVectorIdxConstant(ElemIdx, dl));
+    if (Tmp2.getOpcode() != ISD::EXTRACT_VECTOR_ELT)
+      continue;
+
+    SDValue Store;
+    if (StoreSizeInBits == 32) {
+      SDValue StoreOps[] = {Chain, Tmp2, Base};
+      Store =
+          DAG.getMemIntrinsicNode(PPCISD::STFIWX, dl, DAG.getVTList(MVT::Other),
+                                  StoreOps, StoreVT, MMO);
+    } else if (StoreSizeInBits == 64) {
+      Store = DAG.getStore(Chain, dl, Tmp2, Base, MMO);
+    } else {
+      SDValue StoreOps[] = {
+          Chain, Tmp2, Base,
+          DAG.getConstant((StoreSizeInBits / 8), dl, MVT::i32)};
+      Store =
+          DAG.getMemIntrinsicNode(PPCISD::STXSIX, dl, DAG.getVTList(MVT::Other),
+                                  StoreOps, StoreVT, MMO);
+    }
+    DCI.AddToWorklist(Store.getNode());
+    return Store;
+  }
+  return SDValue();
+}
+
 // Handle DAG combine for STORE (FP_TO_INT F).
 SDValue PPCTargetLowering::combineStoreFPToInt(SDNode *N,
                                                DAGCombinerInfo &DCI) const {
@@ -15597,6 +15716,12 @@
            StoreVT == MVT::v4f32 || StoreVT == MVT::v4i32))
         return expandVSXStoreForLE(N, DCI);
     }
+
+    // Find opportunity to reuse constant from ConstantSplatVector
+    if (Subtarget.hasVSX() && isa<ConstantSDNode>(N->getOperand(1)))
+      if (SDValue Val = findAndReuseSplatForConst(N, DCI))
+        return Val;
+
     break;
   }
   case ISD::LOAD: {
diff --git a/llvm/lib/Target/PowerPC/PPCInstrVSX.td b/llvm/lib/Target/PowerPC/PPCInstrVSX.td
--- a/llvm/lib/Target/PowerPC/PPCInstrVSX.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrVSX.td
@@ -4290,6 +4290,8 @@
           (STXSIBXv (COPY_TO_REGCLASS (v16i8 (VSLDOI $S, $S, 7)), VSRC), ForceXForm:$dst)>;
 def : Pat<(truncstorei8 (i32 (vector_extract v16i8:$S, 15)), ForceXForm:$dst),
           (STXSIBXv (COPY_TO_REGCLASS (v16i8 (VSLDOI $S, $S, 8)), VSRC), ForceXForm:$dst)>;
+def : Pat<(PPCstxsix (f64 (vector_extract v2f64:$S, 0)), ForceXForm:$dst, 1),
+          (STXSIBXv (COPY_TO_REGCLASS $S, VSRC), ForceXForm:$dst)>;
 
 // Scalar stores of i16
 def : Pat<(truncstorei16 (i32 (vector_extract v8i16:$S, 0)), ForceXForm:$dst),
@@ -4308,6 +4310,8 @@
           (STXSIHXv (COPY_TO_REGCLASS (v16i8 (VSLDOI $S, $S, 6)), VSRC), ForceXForm:$dst)>;
 def : Pat<(truncstorei16 (i32 (vector_extract v8i16:$S, 7)), ForceXForm:$dst),
           (STXSIHXv (COPY_TO_REGCLASS (v16i8 (VSLDOI $S, $S, 8)), VSRC), ForceXForm:$dst)>;
+def : Pat<(PPCstxsix (f64 (vector_extract v2f64:$S, 0)), ForceXForm:$dst, 2),
+          (STXSIHXv (COPY_TO_REGCLASS $S, VSRC), ForceXForm:$dst)>;
 } // HasVSX, HasP9Vector, IsBigEndian
 
 // Big endian 64Bit Power9 subtarget.
@@ -4584,6 +4588,8 @@
           (STXSIBXv (COPY_TO_REGCLASS (v16i8 (VSLDOI $S, $S, 10)), VSRC), ForceXForm:$dst)>;
 def : Pat<(truncstorei8 (i32 (vector_extract v16i8:$S, 15)), ForceXForm:$dst),
           (STXSIBXv (COPY_TO_REGCLASS (v16i8 (VSLDOI $S, $S, 9)), VSRC), ForceXForm:$dst)>;
+def : Pat<(PPCstxsix (f64 (vector_extract v2f64:$S, 1)), ForceXForm:$dst, 1),
+          (STXSIBXv (COPY_TO_REGCLASS $S, VSRC), ForceXForm:$dst)>;
 
 // Scalar stores of i16
 def : Pat<(truncstorei16 (i32 (vector_extract v8i16:$S, 0)), ForceXForm:$dst),
@@ -4602,6 +4608,8 @@
           (STXSIHXv (COPY_TO_REGCLASS (v16i8 (VSLDOI $S, $S, 12)), VSRC), ForceXForm:$dst)>;
 def : Pat<(truncstorei16 (i32 (vector_extract v8i16:$S, 7)), ForceXForm:$dst),
           (STXSIHXv (COPY_TO_REGCLASS (v16i8 (VSLDOI $S, $S, 10)), VSRC), ForceXForm:$dst)>;
+def : Pat<(PPCstxsix (f64 (vector_extract v2f64:$S, 1)), ForceXForm:$dst, 2),
+          (STXSIHXv (COPY_TO_REGCLASS $S, VSRC), ForceXForm:$dst)>;
 
 defm : ScalToVecWPermute<
   v2i64, (i64 (load DSForm:$src)),
diff --git a/llvm/test/CodeGen/PowerPC/const-splat-array-init.ll b/llvm/test/CodeGen/PowerPC/const-splat-array-init.ll
--- a/llvm/test/CodeGen/PowerPC/const-splat-array-init.ll
+++ b/llvm/test/CodeGen/PowerPC/const-splat-array-init.ll
@@ -26,17 +26,17 @@
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C0(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    li 4, 3333
-; P9-BE-NEXT:    sth 4, 16(3)
+; P9-BE-NEXT:    li 4, 16
 ; P9-BE-NEXT:    stxv 0, 0(3)
+; P9-BE-NEXT:    stxsihx 0, 3, 4
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo1:
 ; P10-BE:       # %bb.0: # %entry
 ; P10-BE-NEXT:    xxspltiw 0, 218434821
-; P10-BE-NEXT:    li 4, 3333
-; P10-BE-NEXT:    sth 4, 16(3)
+; P10-BE-NEXT:    li 4, 16
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    stxsihx 0, 3, 4
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo1:
@@ -54,17 +54,17 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI0_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI0_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    li 4, 3333
-; P9-LE-NEXT:    sth 4, 16(3)
+; P9-LE-NEXT:    li 4, 16
 ; P9-LE-NEXT:    stxv 0, 0(3)
+; P9-LE-NEXT:    stxsihx 0, 3, 4
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo1:
 ; P10-LE:       # %bb.0: # %entry
 ; P10-LE-NEXT:    xxspltiw 0, 218434821
-; P10-LE-NEXT:    li 4, 3333
-; P10-LE-NEXT:    sth 4, 16(3)
+; P10-LE-NEXT:    li 4, 16
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    stxsihx 0, 3, 4
 ; P10-LE-NEXT:    blr
 entry:
   store <8 x i16> <i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333>, ptr %a, align 2
@@ -78,28 +78,26 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C1(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, 3333
-; P8-BE-NEXT:    ori 4, 4, 3333
-; P8-BE-NEXT:    stw 4, 16(3)
+; P8-BE-NEXT:    li 4, 16
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
+; P8-BE-NEXT:    stfiwx 0, 3, 4
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: foo2:
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C1(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    lis 4, 3333
-; P9-BE-NEXT:    ori 4, 4, 3333
-; P9-BE-NEXT:    stw 4, 16(3)
+; P9-BE-NEXT:    li 4, 16
 ; P9-BE-NEXT:    stxv 0, 0(3)
+; P9-BE-NEXT:    stfiwx 0, 3, 4
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo2:
 ; P10-BE:       # %bb.0: # %entry
 ; P10-BE-NEXT:    xxspltiw 0, 218434821
-; P10-BE-NEXT:    pli 4, 218434821
-; P10-BE-NEXT:    stw 4, 16(3)
+; P10-BE-NEXT:    li 4, 16
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    stfiwx 0, 3, 4
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo2:
@@ -107,10 +105,9 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI1_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI1_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, 3333
-; P8-LE-NEXT:    ori 4, 4, 3333
+; P8-LE-NEXT:    li 4, 16
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
-; P8-LE-NEXT:    stw 4, 16(3)
+; P8-LE-NEXT:    stfiwx 0, 3, 4
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: foo2:
@@ -118,18 +115,17 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI1_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI1_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    lis 4, 3333
-; P9-LE-NEXT:    ori 4, 4, 3333
-; P9-LE-NEXT:    stw 4, 16(3)
+; P9-LE-NEXT:    li 4, 16
 ; P9-LE-NEXT:    stxv 0, 0(3)
+; P9-LE-NEXT:    stfiwx 0, 3, 4
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo2:
 ; P10-LE:       # %bb.0: # %entry
 ; P10-LE-NEXT:    xxspltiw 0, 218434821
-; P10-LE-NEXT:    pli 4, 218434821
-; P10-LE-NEXT:    stw 4, 16(3)
+; P10-LE-NEXT:    li 4, 16
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    stfiwx 0, 3, 4
 ; P10-LE-NEXT:    blr
 entry:
   store <8 x i16> <i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333>, ptr %a, align 2
@@ -144,35 +140,33 @@
 ; P8-BE-LABEL: foo3:
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C2(2) # %const.0
+; P8-BE-NEXT:    li 5, 3333
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, 3333
-; P8-BE-NEXT:    ori 4, 4, 3333
-; P8-BE-NEXT:    stw 4, 16(3)
-; P8-BE-NEXT:    li 4, 3333
+; P8-BE-NEXT:    li 4, 16
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
-; P8-BE-NEXT:    sth 4, 20(3)
+; P8-BE-NEXT:    stfiwx 0, 3, 4
+; P8-BE-NEXT:    sth 5, 20(3)
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: foo3:
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C2(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    lis 4, 3333
-; P9-BE-NEXT:    ori 4, 4, 3333
-; P9-BE-NEXT:    stw 4, 16(3)
-; P9-BE-NEXT:    li 4, 3333
+; P9-BE-NEXT:    li 4, 16
 ; P9-BE-NEXT:    stxv 0, 0(3)
-; P9-BE-NEXT:    sth 4, 20(3)
+; P9-BE-NEXT:    stfiwx 0, 3, 4
+; P9-BE-NEXT:    li 4, 20
+; P9-BE-NEXT:    stxsihx 0, 3, 4
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo3:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 218434821
 ; P10-BE-NEXT:    xxspltiw 0, 218434821
-; P10-BE-NEXT:    stw 4, 16(3)
-; P10-BE-NEXT:    li 4, 3333
+; P10-BE-NEXT:    li 4, 16
 ; P10-BE-NEXT:    stxv 0, 0(3)
-; P10-BE-NEXT:    sth 4, 20(3)
+; P10-BE-NEXT:    stfiwx 0, 3, 4
+; P10-BE-NEXT:    li 4, 20
+; P10-BE-NEXT:    stxsihx 0, 3, 4
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo3:
@@ -181,10 +175,9 @@
 ; P8-LE-NEXT:    li 5, 3333
 ; P8-LE-NEXT:    addi 4, 4, .LCPI2_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, 3333
-; P8-LE-NEXT:    ori 4, 4, 3333
+; P8-LE-NEXT:    li 4, 16
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
-; P8-LE-NEXT:    stw 4, 16(3)
+; P8-LE-NEXT:    stfiwx 0, 3, 4
 ; P8-LE-NEXT:    sth 5, 20(3)
 ; P8-LE-NEXT:    blr
 ;
@@ -193,22 +186,21 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI2_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI2_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    lis 4, 3333
-; P9-LE-NEXT:    ori 4, 4, 3333
-; P9-LE-NEXT:    stw 4, 16(3)
-; P9-LE-NEXT:    li 4, 3333
+; P9-LE-NEXT:    li 4, 16
 ; P9-LE-NEXT:    stxv 0, 0(3)
-; P9-LE-NEXT:    sth 4, 20(3)
+; P9-LE-NEXT:    stfiwx 0, 3, 4
+; P9-LE-NEXT:    li 4, 20
+; P9-LE-NEXT:    stxsihx 0, 3, 4
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo3:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 218434821
 ; P10-LE-NEXT:    xxspltiw 0, 218434821
-; P10-LE-NEXT:    stw 4, 16(3)
-; P10-LE-NEXT:    li 4, 3333
+; P10-LE-NEXT:    li 4, 16
 ; P10-LE-NEXT:    stxv 0, 0(3)
-; P10-LE-NEXT:    sth 4, 20(3)
+; P10-LE-NEXT:    stfiwx 0, 3, 4
+; P10-LE-NEXT:    li 4, 20
+; P10-LE-NEXT:    stxsihx 0, 3, 4
 ; P10-LE-NEXT:    blr
 entry:
   store <8 x i16> <i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333>, ptr %a, align 2
@@ -226,31 +218,23 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C3(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, 3333
-; P8-BE-NEXT:    ori 4, 4, 3333
-; P8-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
-; P8-BE-NEXT:    std 4, 16(3)
+; P8-BE-NEXT:    stfd 0, 16(3)
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: foo4:
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C3(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    lis 4, 3333
-; P9-BE-NEXT:    ori 4, 4, 3333
-; P9-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P9-BE-NEXT:    stxv 0, 0(3)
-; P9-BE-NEXT:    std 4, 16(3)
+; P9-BE-NEXT:    stfd 0, 16(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo4:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 218434821
 ; P10-BE-NEXT:    xxspltiw 0, 218434821
-; P10-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P10-BE-NEXT:    stxv 0, 0(3)
-; P10-BE-NEXT:    std 4, 16(3)
+; P10-BE-NEXT:    stfd 0, 16(3)
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo4:
@@ -258,11 +242,8 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI3_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI3_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, 3333
-; P8-LE-NEXT:    ori 4, 4, 3333
-; P8-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
-; P8-LE-NEXT:    std 4, 16(3)
+; P8-LE-NEXT:    stfd 0, 16(3)
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: foo4:
@@ -270,20 +251,15 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI3_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI3_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    lis 4, 3333
-; P9-LE-NEXT:    ori 4, 4, 3333
-; P9-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P9-LE-NEXT:    stxv 0, 0(3)
-; P9-LE-NEXT:    std 4, 16(3)
+; P9-LE-NEXT:    stfd 0, 16(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo4:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 218434821
 ; P10-LE-NEXT:    xxspltiw 0, 218434821
-; P10-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P10-LE-NEXT:    stxv 0, 0(3)
-; P10-LE-NEXT:    std 4, 16(3)
+; P10-LE-NEXT:    stfd 0, 16(3)
 ; P10-LE-NEXT:    blr
 entry:
   store <8 x i16> <i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333, i16 3333>, ptr %a, align 2
@@ -303,28 +279,26 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C4(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, 5
-; P8-BE-NEXT:    ori 4, 4, 5653
-; P8-BE-NEXT:    stw 4, 16(3)
+; P8-BE-NEXT:    li 4, 16
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
+; P8-BE-NEXT:    stfiwx 0, 3, 4
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: foo5:
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C4(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    lis 4, 5
-; P9-BE-NEXT:    ori 4, 4, 5653
-; P9-BE-NEXT:    stw 4, 16(3)
+; P9-BE-NEXT:    li 4, 16
 ; P9-BE-NEXT:    stxv 0, 0(3)
+; P9-BE-NEXT:    stfiwx 0, 3, 4
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo5:
 ; P10-BE:       # %bb.0: # %entry
 ; P10-BE-NEXT:    xxspltiw 0, 333333
-; P10-BE-NEXT:    pli 4, 333333
-; P10-BE-NEXT:    stw 4, 16(3)
+; P10-BE-NEXT:    li 4, 16
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    stfiwx 0, 3, 4
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo5:
@@ -332,10 +306,9 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI4_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI4_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, 5
-; P8-LE-NEXT:    ori 4, 4, 5653
+; P8-LE-NEXT:    li 4, 16
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
-; P8-LE-NEXT:    stw 4, 16(3)
+; P8-LE-NEXT:    stfiwx 0, 3, 4
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: foo5:
@@ -343,18 +316,17 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI4_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI4_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    lis 4, 5
-; P9-LE-NEXT:    ori 4, 4, 5653
-; P9-LE-NEXT:    stw 4, 16(3)
+; P9-LE-NEXT:    li 4, 16
 ; P9-LE-NEXT:    stxv 0, 0(3)
+; P9-LE-NEXT:    stfiwx 0, 3, 4
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo5:
 ; P10-LE:       # %bb.0: # %entry
 ; P10-LE-NEXT:    xxspltiw 0, 333333
-; P10-LE-NEXT:    pli 4, 333333
-; P10-LE-NEXT:    stw 4, 16(3)
+; P10-LE-NEXT:    li 4, 16
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    stfiwx 0, 3, 4
 ; P10-LE-NEXT:    blr
 entry:
   store <4 x i32> <i32 333333, i32 333333, i32 333333, i32 333333>, ptr %a, align 4
@@ -368,31 +340,23 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C5(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, 5
-; P8-BE-NEXT:    ori 4, 4, 5653
-; P8-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
-; P8-BE-NEXT:    std 4, 16(3)
+; P8-BE-NEXT:    stfd 0, 16(3)
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: foo6:
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C5(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    lis 4, 5
-; P9-BE-NEXT:    ori 4, 4, 5653
-; P9-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P9-BE-NEXT:    stxv 0, 0(3)
-; P9-BE-NEXT:    std 4, 16(3)
+; P9-BE-NEXT:    stfd 0, 16(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo6:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 333333
 ; P10-BE-NEXT:    xxspltiw 0, 333333
-; P10-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P10-BE-NEXT:    stxv 0, 0(3)
-; P10-BE-NEXT:    std 4, 16(3)
+; P10-BE-NEXT:    stfd 0, 16(3)
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo6:
@@ -400,11 +364,8 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI5_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI5_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, 5
-; P8-LE-NEXT:    ori 4, 4, 5653
-; P8-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
-; P8-LE-NEXT:    std 4, 16(3)
+; P8-LE-NEXT:    stfd 0, 16(3)
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: foo6:
@@ -412,20 +373,15 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI5_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI5_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    lis 4, 5
-; P9-LE-NEXT:    ori 4, 4, 5653
-; P9-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P9-LE-NEXT:    stxv 0, 0(3)
-; P9-LE-NEXT:    std 4, 16(3)
+; P9-LE-NEXT:    stfd 0, 16(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo6:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 333333
 ; P10-LE-NEXT:    xxspltiw 0, 333333
-; P10-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P10-LE-NEXT:    stxv 0, 0(3)
-; P10-LE-NEXT:    std 4, 16(3)
+; P10-LE-NEXT:    stfd 0, 16(3)
 ; P10-LE-NEXT:    blr
 entry:
   store <4 x i32> <i32 333333, i32 333333, i32 333333, i32 333333>, ptr %a, align 4
@@ -441,29 +397,24 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C6(2) # %const.0
 ; P8-BE-NEXT:    lxvd2x 0, 0, 4
-; P8-BE-NEXT:    lis 4, 508
-; P8-BE-NEXT:    ori 4, 4, 41045
-; P8-BE-NEXT:    std 4, 16(3)
 ; P8-BE-NEXT:    stxvd2x 0, 0, 3
+; P8-BE-NEXT:    stfd 0, 16(3)
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: foo7:
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C6(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    lis 4, 508
-; P9-BE-NEXT:    ori 4, 4, 41045
-; P9-BE-NEXT:    std 4, 16(3)
 ; P9-BE-NEXT:    stxv 0, 0(3)
+; P9-BE-NEXT:    stfd 0, 16(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo7:
 ; P10-BE:       # %bb.0: # %entry
 ; P10-BE-NEXT:    xxlxor 0, 0, 0
-; P10-BE-NEXT:    pli 4, 33333333
 ; P10-BE-NEXT:    xxsplti32dx 0, 1, 33333333
-; P10-BE-NEXT:    std 4, 16(3)
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    stfd 0, 16(3)
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo7:
@@ -471,10 +422,8 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI6_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI6_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, 508
-; P8-LE-NEXT:    ori 4, 4, 41045
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
-; P8-LE-NEXT:    std 4, 16(3)
+; P8-LE-NEXT:    stfd 0, 16(3)
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: foo7:
@@ -482,19 +431,16 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI6_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI6_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    lis 4, 508
-; P9-LE-NEXT:    ori 4, 4, 41045
-; P9-LE-NEXT:    std 4, 16(3)
 ; P9-LE-NEXT:    stxv 0, 0(3)
+; P9-LE-NEXT:    stfd 0, 16(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo7:
 ; P10-LE:       # %bb.0: # %entry
 ; P10-LE-NEXT:    xxlxor 0, 0, 0
-; P10-LE-NEXT:    pli 4, 33333333
 ; P10-LE-NEXT:    xxsplti32dx 0, 1, 33333333
-; P10-LE-NEXT:    std 4, 16(3)
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    stfd 0, 16(3)
 ; P10-LE-NEXT:    blr
 entry:
   store <2 x i64> <i64 33333333, i64 33333333>, ptr %a, align 8
@@ -508,28 +454,26 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C7(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, 16469
-; P8-BE-NEXT:    ori 4, 4, 7864
-; P8-BE-NEXT:    stw 4, 16(3)
+; P8-BE-NEXT:    li 4, 16
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
+; P8-BE-NEXT:    stfiwx 0, 3, 4
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: foo8:
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C7(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    lis 4, 16469
-; P9-BE-NEXT:    ori 4, 4, 7864
-; P9-BE-NEXT:    stw 4, 16(3)
+; P9-BE-NEXT:    li 4, 16
 ; P9-BE-NEXT:    stxv 0, 0(3)
+; P9-BE-NEXT:    stfiwx 0, 3, 4
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo8:
 ; P10-BE:       # %bb.0: # %entry
 ; P10-BE-NEXT:    xxspltiw 0, 1079320248
-; P10-BE-NEXT:    pli 4, 1079320248
-; P10-BE-NEXT:    stw 4, 16(3)
+; P10-BE-NEXT:    li 4, 16
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    stfiwx 0, 3, 4
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo8:
@@ -537,10 +481,9 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI7_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI7_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, 16469
-; P8-LE-NEXT:    ori 4, 4, 7864
+; P8-LE-NEXT:    li 4, 16
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
-; P8-LE-NEXT:    stw 4, 16(3)
+; P8-LE-NEXT:    stfiwx 0, 3, 4
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: foo8:
@@ -548,18 +491,17 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI7_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI7_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    lis 4, 16469
-; P9-LE-NEXT:    ori 4, 4, 7864
-; P9-LE-NEXT:    stw 4, 16(3)
+; P9-LE-NEXT:    li 4, 16
 ; P9-LE-NEXT:    stxv 0, 0(3)
+; P9-LE-NEXT:    stfiwx 0, 3, 4
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo8:
 ; P10-LE:       # %bb.0: # %entry
 ; P10-LE-NEXT:    xxspltiw 0, 1079320248
-; P10-LE-NEXT:    pli 4, 1079320248
-; P10-LE-NEXT:    stw 4, 16(3)
+; P10-LE-NEXT:    li 4, 16
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    stfiwx 0, 3, 4
 ; P10-LE-NEXT:    blr
 entry:
   store <4 x float> <float 0x400AA3D700000000, float 0x400AA3D700000000, float 0x400AA3D700000000, float 0x400AA3D700000000>, ptr %a, align 4
@@ -656,31 +598,23 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C9(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, 16469
-; P8-BE-NEXT:    ori 4, 4, 7864
-; P8-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
-; P8-BE-NEXT:    std 4, 16(3)
+; P8-BE-NEXT:    stfd 0, 16(3)
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: foo10:
 ; P9-BE:       # %bb.0: # %entry
 ; P9-BE-NEXT:    ld 4, L..C9(2) # %const.0
 ; P9-BE-NEXT:    lxv 0, 0(4)
-; P9-BE-NEXT:    lis 4, 16469
-; P9-BE-NEXT:    ori 4, 4, 7864
-; P9-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P9-BE-NEXT:    stxv 0, 0(3)
-; P9-BE-NEXT:    std 4, 16(3)
+; P9-BE-NEXT:    stfd 0, 16(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: foo10:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 1079320248
 ; P10-BE-NEXT:    xxspltiw 0, 1079320248
-; P10-BE-NEXT:    rldimi 4, 4, 32, 0
 ; P10-BE-NEXT:    stxv 0, 0(3)
-; P10-BE-NEXT:    std 4, 16(3)
+; P10-BE-NEXT:    stfd 0, 16(3)
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: foo10:
@@ -688,11 +622,8 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI9_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI9_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, 16469
-; P8-LE-NEXT:    ori 4, 4, 7864
-; P8-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
-; P8-LE-NEXT:    std 4, 16(3)
+; P8-LE-NEXT:    stfd 0, 16(3)
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: foo10:
@@ -700,20 +631,15 @@
 ; P9-LE-NEXT:    addis 4, 2, .LCPI9_0@toc@ha
 ; P9-LE-NEXT:    addi 4, 4, .LCPI9_0@toc@l
 ; P9-LE-NEXT:    lxv 0, 0(4)
-; P9-LE-NEXT:    lis 4, 16469
-; P9-LE-NEXT:    ori 4, 4, 7864
-; P9-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P9-LE-NEXT:    stxv 0, 0(3)
-; P9-LE-NEXT:    std 4, 16(3)
+; P9-LE-NEXT:    stfd 0, 16(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: foo10:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 1079320248
 ; P10-LE-NEXT:    xxspltiw 0, 1079320248
-; P10-LE-NEXT:    rldimi 4, 4, 32, 0
 ; P10-LE-NEXT:    stxv 0, 0(3)
-; P10-LE-NEXT:    std 4, 16(3)
+; P10-LE-NEXT:    stfd 0, 16(3)
 ; P10-LE-NEXT:    blr
 entry:
   store <4 x float> <float 0x400AA3D700000000, float 0x400AA3D700000000, float 0x400AA3D700000000, float 0x400AA3D700000000>, ptr %a, align 4
diff --git a/llvm/test/CodeGen/PowerPC/memset-tail.ll b/llvm/test/CodeGen/PowerPC/memset-tail.ll
--- a/llvm/test/CodeGen/PowerPC/memset-tail.ll
+++ b/llvm/test/CodeGen/PowerPC/memset-tail.ll
@@ -169,59 +169,46 @@
 ; P8-BE-LABEL: memsetTailV1B8:
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    vspltisb 2, 15
-; P8-BE-NEXT:    lis 4, 3855
-; P8-BE-NEXT:    ori 4, 4, 3855
-; P8-BE-NEXT:    rldimi 4, 4, 32, 0
+; P8-BE-NEXT:    li 4, 16
+; P8-BE-NEXT:    stxsdx 34, 3, 4
 ; P8-BE-NEXT:    stxvw4x 34, 0, 3
-; P8-BE-NEXT:    std 4, 16(3)
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: memsetTailV1B8:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    lis 4, 3855
 ; P9-BE-NEXT:    xxspltib 0, 15
-; P9-BE-NEXT:    ori 4, 4, 3855
 ; P9-BE-NEXT:    stxv 0, 0(3)
-; P9-BE-NEXT:    rldimi 4, 4, 32, 0
-; P9-BE-NEXT:    std 4, 16(3)
+; P9-BE-NEXT:    stfd 0, 16(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memsetTailV1B8:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 252645135
-; P10-BE-NEXT:    rldimi 4, 4, 32, 0
-; P10-BE-NEXT:    std 4, 16(3)
 ; P10-BE-NEXT:    xxspltib 0, 15
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    stfd 0, 16(3)
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: memsetTailV1B8:
 ; P8-LE:       # %bb.0: # %entry
-; P8-LE-NEXT:    lis 4, 3855
 ; P8-LE-NEXT:    vspltisb 2, 15
-; P8-LE-NEXT:    ori 4, 4, 3855
-; P8-LE-NEXT:    rldimi 4, 4, 32, 0
-; P8-LE-NEXT:    std 4, 16(3)
-; P8-LE-NEXT:    stxvd2x 34, 0, 3
+; P8-LE-NEXT:    li 4, 16
+; P8-LE-NEXT:    xxswapd 0, 34
+; P8-LE-NEXT:    stxsdx 34, 3, 4
+; P8-LE-NEXT:    stxvd2x 0, 0, 3
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: memsetTailV1B8:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    lis 4, 3855
 ; P9-LE-NEXT:    xxspltib 0, 15
-; P9-LE-NEXT:    ori 4, 4, 3855
 ; P9-LE-NEXT:    stxv 0, 0(3)
-; P9-LE-NEXT:    rldimi 4, 4, 32, 0
-; P9-LE-NEXT:    std 4, 16(3)
+; P9-LE-NEXT:    stfd 0, 16(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memsetTailV1B8:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 252645135
-; P10-LE-NEXT:    rldimi 4, 4, 32, 0
-; P10-LE-NEXT:    std 4, 16(3)
 ; P10-LE-NEXT:    xxspltib 0, 15
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    stfd 0, 16(3)
 ; P10-LE-NEXT:    blr
 entry:
   tail call void @llvm.memset.p0.i64(ptr %p, i8 15, i64 24, i1 false)
@@ -231,64 +218,47 @@
 define dso_local void @memsetTailV1B7(ptr nocapture noundef writeonly %p) local_unnamed_addr {
 ; P8-BE-LABEL: memsetTailV1B7:
 ; P8-BE:       # %bb.0: # %entry
-; P8-BE-NEXT:    lis 4, 3855
 ; P8-BE-NEXT:    vspltisb 2, 15
-; P8-BE-NEXT:    li 5, 15
-; P8-BE-NEXT:    ori 4, 4, 3855
-; P8-BE-NEXT:    rldimi 4, 4, 32, 0
-; P8-BE-NEXT:    stdx 4, 3, 5
+; P8-BE-NEXT:    li 4, 15
+; P8-BE-NEXT:    stxsdx 34, 3, 4
 ; P8-BE-NEXT:    stxvw4x 34, 0, 3
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: memsetTailV1B7:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    lis 4, 3855
-; P9-BE-NEXT:    li 5, 15
-; P9-BE-NEXT:    ori 4, 4, 3855
-; P9-BE-NEXT:    rldimi 4, 4, 32, 0
-; P9-BE-NEXT:    stdx 4, 3, 5
 ; P9-BE-NEXT:    xxspltib 0, 15
+; P9-BE-NEXT:    stfd 0, 15(3)
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memsetTailV1B7:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 252645135
-; P10-BE-NEXT:    rldimi 4, 4, 32, 0
-; P10-BE-NEXT:    pstd 4, 15(3), 0
 ; P10-BE-NEXT:    xxspltib 0, 15
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    pstfd 0, 15(3), 0
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: memsetTailV1B7:
 ; P8-LE:       # %bb.0: # %entry
-; P8-LE-NEXT:    lis 4, 3855
 ; P8-LE-NEXT:    vspltisb 2, 15
-; P8-LE-NEXT:    li 5, 15
-; P8-LE-NEXT:    ori 4, 4, 3855
-; P8-LE-NEXT:    rldimi 4, 4, 32, 0
-; P8-LE-NEXT:    stdx 4, 3, 5
-; P8-LE-NEXT:    stxvd2x 34, 0, 3
+; P8-LE-NEXT:    li 4, 15
+; P8-LE-NEXT:    xxswapd 0, 34
+; P8-LE-NEXT:    stxsdx 34, 3, 4
+; P8-LE-NEXT:    stxvd2x 0, 0, 3
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: memsetTailV1B7:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    lis 4, 3855
-; P9-LE-NEXT:    li 5, 15
-; P9-LE-NEXT:    ori 4, 4, 3855
-; P9-LE-NEXT:    rldimi 4, 4, 32, 0
-; P9-LE-NEXT:    stdx 4, 3, 5
 ; P9-LE-NEXT:    xxspltib 0, 15
+; P9-LE-NEXT:    stfd 0, 15(3)
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memsetTailV1B7:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 252645135
-; P10-LE-NEXT:    rldimi 4, 4, 32, 0
-; P10-LE-NEXT:    pstd 4, 15(3), 0
 ; P10-LE-NEXT:    xxspltib 0, 15
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    pstfd 0, 15(3), 0
 ; P10-LE-NEXT:    blr
 entry:
   tail call void @llvm.memset.p0.i64(ptr %p, i8 15, i64 23, i1 false)
@@ -299,52 +269,49 @@
 ; P8-BE-LABEL: memsetTailV1B4:
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    vspltisb 2, 15
-; P8-BE-NEXT:    lis 4, 3855
-; P8-BE-NEXT:    ori 4, 4, 3855
-; P8-BE-NEXT:    stw 4, 16(3)
+; P8-BE-NEXT:    li 4, 16
+; P8-BE-NEXT:    stxsiwx 34, 3, 4
 ; P8-BE-NEXT:    stxvw4x 34, 0, 3
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: memsetTailV1B4:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    lis 4, 3855
-; P9-BE-NEXT:    ori 4, 4, 3855
-; P9-BE-NEXT:    stw 4, 16(3)
 ; P9-BE-NEXT:    xxspltib 0, 15
+; P9-BE-NEXT:    li 4, 16
+; P9-BE-NEXT:    stfiwx 0, 3, 4
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memsetTailV1B4:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 252645135
-; P10-BE-NEXT:    stw 4, 16(3)
 ; P10-BE-NEXT:    xxspltib 0, 15
+; P10-BE-NEXT:    li 4, 16
+; P10-BE-NEXT:    stfiwx 0, 3, 4
 ; P10-BE-NEXT:    stxv 0, 0(3)
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: memsetTailV1B4:
 ; P8-LE:       # %bb.0: # %entry
 ; P8-LE-NEXT:    vspltisb 2, 15
-; P8-LE-NEXT:    lis 4, 3855
-; P8-LE-NEXT:    ori 4, 4, 3855
-; P8-LE-NEXT:    stw 4, 16(3)
-; P8-LE-NEXT:    stxvd2x 34, 0, 3
+; P8-LE-NEXT:    li 4, 16
+; P8-LE-NEXT:    xxswapd 0, 34
+; P8-LE-NEXT:    stxsiwx 34, 3, 4
+; P8-LE-NEXT:    stxvd2x 0, 0, 3
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: memsetTailV1B4:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    lis 4, 3855
-; P9-LE-NEXT:    ori 4, 4, 3855
-; P9-LE-NEXT:    stw 4, 16(3)
 ; P9-LE-NEXT:    xxspltib 0, 15
+; P9-LE-NEXT:    li 4, 16
+; P9-LE-NEXT:    stfiwx 0, 3, 4
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memsetTailV1B4:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 252645135
-; P10-LE-NEXT:    stw 4, 16(3)
 ; P10-LE-NEXT:    xxspltib 0, 15
+; P10-LE-NEXT:    li 4, 16
+; P10-LE-NEXT:    stfiwx 0, 3, 4
 ; P10-LE-NEXT:    stxv 0, 0(3)
 ; P10-LE-NEXT:    blr
 entry:
@@ -356,52 +323,49 @@
 ; P8-BE-LABEL: memsetTailV1B3:
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    vspltisb 2, 15
-; P8-BE-NEXT:    lis 4, 3855
-; P8-BE-NEXT:    ori 4, 4, 3855
+; P8-BE-NEXT:    li 4, 15
+; P8-BE-NEXT:    stxsiwx 34, 3, 4
 ; P8-BE-NEXT:    stxvw4x 34, 0, 3
-; P8-BE-NEXT:    stw 4, 15(3)
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: memsetTailV1B3:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    lis 4, 3855
-; P9-BE-NEXT:    ori 4, 4, 3855
-; P9-BE-NEXT:    stw 4, 15(3)
 ; P9-BE-NEXT:    xxspltib 0, 15
+; P9-BE-NEXT:    li 4, 15
+; P9-BE-NEXT:    stfiwx 0, 3, 4
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memsetTailV1B3:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 252645135
-; P10-BE-NEXT:    stw 4, 15(3)
 ; P10-BE-NEXT:    xxspltib 0, 15
+; P10-BE-NEXT:    li 4, 15
+; P10-BE-NEXT:    stfiwx 0, 3, 4
 ; P10-BE-NEXT:    stxv 0, 0(3)
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: memsetTailV1B3:
 ; P8-LE:       # %bb.0: # %entry
 ; P8-LE-NEXT:    vspltisb 2, 15
-; P8-LE-NEXT:    lis 4, 3855
-; P8-LE-NEXT:    ori 4, 4, 3855
-; P8-LE-NEXT:    stw 4, 15(3)
-; P8-LE-NEXT:    stxvd2x 34, 0, 3
+; P8-LE-NEXT:    li 4, 15
+; P8-LE-NEXT:    xxswapd 0, 34
+; P8-LE-NEXT:    stxsiwx 34, 3, 4
+; P8-LE-NEXT:    stxvd2x 0, 0, 3
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: memsetTailV1B3:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    lis 4, 3855
-; P9-LE-NEXT:    ori 4, 4, 3855
-; P9-LE-NEXT:    stw 4, 15(3)
 ; P9-LE-NEXT:    xxspltib 0, 15
+; P9-LE-NEXT:    li 4, 15
+; P9-LE-NEXT:    stfiwx 0, 3, 4
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memsetTailV1B3:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 252645135
-; P10-LE-NEXT:    stw 4, 15(3)
 ; P10-LE-NEXT:    xxspltib 0, 15
+; P10-LE-NEXT:    li 4, 15
+; P10-LE-NEXT:    stfiwx 0, 3, 4
 ; P10-LE-NEXT:    stxv 0, 0(3)
 ; P10-LE-NEXT:    blr
 entry:
@@ -420,17 +384,17 @@
 ;
 ; P9-BE-LABEL: memsetTailV1B2:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    li 4, 3855
-; P9-BE-NEXT:    sth 4, 16(3)
 ; P9-BE-NEXT:    xxspltib 0, 15
+; P9-BE-NEXT:    li 4, 16
+; P9-BE-NEXT:    stxsihx 0, 3, 4
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memsetTailV1B2:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    li 4, 3855
-; P10-BE-NEXT:    sth 4, 16(3)
 ; P10-BE-NEXT:    xxspltib 0, 15
+; P10-BE-NEXT:    li 4, 16
+; P10-BE-NEXT:    stxsihx 0, 3, 4
 ; P10-BE-NEXT:    stxv 0, 0(3)
 ; P10-BE-NEXT:    blr
 ;
@@ -444,17 +408,17 @@
 ;
 ; P9-LE-LABEL: memsetTailV1B2:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    li 4, 3855
-; P9-LE-NEXT:    sth 4, 16(3)
 ; P9-LE-NEXT:    xxspltib 0, 15
+; P9-LE-NEXT:    li 4, 16
+; P9-LE-NEXT:    stxsihx 0, 3, 4
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memsetTailV1B2:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    li 4, 3855
-; P10-LE-NEXT:    sth 4, 16(3)
 ; P10-LE-NEXT:    xxspltib 0, 15
+; P10-LE-NEXT:    li 4, 16
+; P10-LE-NEXT:    stxsihx 0, 3, 4
 ; P10-LE-NEXT:    stxv 0, 0(3)
 ; P10-LE-NEXT:    blr
 entry:
@@ -473,17 +437,17 @@
 ;
 ; P9-BE-LABEL: memsetTailV1B1:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    li 4, 15
-; P9-BE-NEXT:    stb 4, 16(3)
 ; P9-BE-NEXT:    xxspltib 0, 15
+; P9-BE-NEXT:    li 4, 16
+; P9-BE-NEXT:    stxsibx 0, 3, 4
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memsetTailV1B1:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    li 4, 15
-; P10-BE-NEXT:    stb 4, 16(3)
 ; P10-BE-NEXT:    xxspltib 0, 15
+; P10-BE-NEXT:    li 4, 16
+; P10-BE-NEXT:    stxsibx 0, 3, 4
 ; P10-BE-NEXT:    stxv 0, 0(3)
 ; P10-BE-NEXT:    blr
 ;
@@ -497,17 +461,17 @@
 ;
 ; P9-LE-LABEL: memsetTailV1B1:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    li 4, 15
-; P9-LE-NEXT:    stb 4, 16(3)
 ; P9-LE-NEXT:    xxspltib 0, 15
+; P9-LE-NEXT:    li 4, 16
+; P9-LE-NEXT:    stxsibx 0, 3, 4
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memsetTailV1B1:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    li 4, 15
-; P10-LE-NEXT:    stb 4, 16(3)
 ; P10-LE-NEXT:    xxspltib 0, 15
+; P10-LE-NEXT:    li 4, 16
+; P10-LE-NEXT:    stxsibx 0, 3, 4
 ; P10-LE-NEXT:    stxv 0, 0(3)
 ; P10-LE-NEXT:    blr
 entry:
@@ -682,30 +646,22 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C3(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, -23131
-; P8-BE-NEXT:    ori 4, 4, 42405
-; P8-BE-NEXT:    rldimi 4, 4, 32, 0
+; P8-BE-NEXT:    stfd 0, 16(3)
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
-; P8-BE-NEXT:    std 4, 16(3)
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: memset2TailV1B8:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    lis 4, -23131
 ; P9-BE-NEXT:    xxspltib 0, 165
-; P9-BE-NEXT:    ori 4, 4, 42405
 ; P9-BE-NEXT:    stxv 0, 0(3)
-; P9-BE-NEXT:    rldimi 4, 4, 32, 0
-; P9-BE-NEXT:    std 4, 16(3)
+; P9-BE-NEXT:    stfd 0, 16(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memset2TailV1B8:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 2779096485
-; P10-BE-NEXT:    rldimi 4, 4, 32, 0
-; P10-BE-NEXT:    std 4, 16(3)
 ; P10-BE-NEXT:    xxspltib 0, 165
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    stfd 0, 16(3)
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: memset2TailV1B8:
@@ -713,30 +669,22 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI12_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI12_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, -23131
-; P8-LE-NEXT:    ori 4, 4, 42405
-; P8-LE-NEXT:    rldimi 4, 4, 32, 0
-; P8-LE-NEXT:    std 4, 16(3)
+; P8-LE-NEXT:    stfd 0, 16(3)
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: memset2TailV1B8:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    lis 4, -23131
 ; P9-LE-NEXT:    xxspltib 0, 165
-; P9-LE-NEXT:    ori 4, 4, 42405
 ; P9-LE-NEXT:    stxv 0, 0(3)
-; P9-LE-NEXT:    rldimi 4, 4, 32, 0
-; P9-LE-NEXT:    std 4, 16(3)
+; P9-LE-NEXT:    stfd 0, 16(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memset2TailV1B8:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 2779096485
-; P10-LE-NEXT:    rldimi 4, 4, 32, 0
-; P10-LE-NEXT:    std 4, 16(3)
 ; P10-LE-NEXT:    xxspltib 0, 165
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    stfd 0, 16(3)
 ; P10-LE-NEXT:    blr
 entry:
   tail call void @llvm.memset.p0.i64(ptr %p, i8 165, i64 24, i1 false)
@@ -747,66 +695,46 @@
 ; P8-BE-LABEL: memset2TailV1B7:
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C4(2) # %const.0
-; P8-BE-NEXT:    lis 5, -23131
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    ori 4, 5, 42405
-; P8-BE-NEXT:    li 5, 15
-; P8-BE-NEXT:    rldimi 4, 4, 32, 0
-; P8-BE-NEXT:    stdx 4, 3, 5
+; P8-BE-NEXT:    stfd 0, 15(3)
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: memset2TailV1B7:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    lis 4, -23131
-; P9-BE-NEXT:    li 5, 15
-; P9-BE-NEXT:    ori 4, 4, 42405
-; P9-BE-NEXT:    rldimi 4, 4, 32, 0
-; P9-BE-NEXT:    stdx 4, 3, 5
 ; P9-BE-NEXT:    xxspltib 0, 165
+; P9-BE-NEXT:    stfd 0, 15(3)
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memset2TailV1B7:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, 2779096485
-; P10-BE-NEXT:    rldimi 4, 4, 32, 0
-; P10-BE-NEXT:    pstd 4, 15(3), 0
 ; P10-BE-NEXT:    xxspltib 0, 165
 ; P10-BE-NEXT:    stxv 0, 0(3)
+; P10-BE-NEXT:    pstfd 0, 15(3), 0
 ; P10-BE-NEXT:    blr
 ;
 ; P8-LE-LABEL: memset2TailV1B7:
 ; P8-LE:       # %bb.0: # %entry
 ; P8-LE-NEXT:    addis 4, 2, .LCPI13_0@toc@ha
-; P8-LE-NEXT:    lis 5, -23131
 ; P8-LE-NEXT:    addi 4, 4, .LCPI13_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    ori 4, 5, 42405
-; P8-LE-NEXT:    li 5, 15
-; P8-LE-NEXT:    rldimi 4, 4, 32, 0
-; P8-LE-NEXT:    stdx 4, 3, 5
+; P8-LE-NEXT:    stfd 0, 15(3)
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: memset2TailV1B7:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    lis 4, -23131
-; P9-LE-NEXT:    li 5, 15
-; P9-LE-NEXT:    ori 4, 4, 42405
-; P9-LE-NEXT:    rldimi 4, 4, 32, 0
-; P9-LE-NEXT:    stdx 4, 3, 5
 ; P9-LE-NEXT:    xxspltib 0, 165
+; P9-LE-NEXT:    stfd 0, 15(3)
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memset2TailV1B7:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, 2779096485
-; P10-LE-NEXT:    rldimi 4, 4, 32, 0
-; P10-LE-NEXT:    pstd 4, 15(3), 0
 ; P10-LE-NEXT:    xxspltib 0, 165
 ; P10-LE-NEXT:    stxv 0, 0(3)
+; P10-LE-NEXT:    pstfd 0, 15(3), 0
 ; P10-LE-NEXT:    blr
 entry:
   tail call void @llvm.memset.p0.i64(ptr %p, i8 165, i64 23, i1 false)
@@ -818,26 +746,24 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C5(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, -23131
-; P8-BE-NEXT:    ori 4, 4, 42405
-; P8-BE-NEXT:    stw 4, 16(3)
+; P8-BE-NEXT:    li 4, 16
+; P8-BE-NEXT:    stfiwx 0, 3, 4
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: memset2TailV1B4:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    lis 4, -23131
-; P9-BE-NEXT:    ori 4, 4, 42405
-; P9-BE-NEXT:    stw 4, 16(3)
 ; P9-BE-NEXT:    xxspltib 0, 165
+; P9-BE-NEXT:    li 4, 16
+; P9-BE-NEXT:    stfiwx 0, 3, 4
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memset2TailV1B4:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, -1515870811
-; P10-BE-NEXT:    stw 4, 16(3)
 ; P10-BE-NEXT:    xxspltib 0, 165
+; P10-BE-NEXT:    li 4, 16
+; P10-BE-NEXT:    stfiwx 0, 3, 4
 ; P10-BE-NEXT:    stxv 0, 0(3)
 ; P10-BE-NEXT:    blr
 ;
@@ -846,26 +772,24 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI14_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI14_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, -23131
-; P8-LE-NEXT:    ori 4, 4, 42405
-; P8-LE-NEXT:    stw 4, 16(3)
+; P8-LE-NEXT:    li 4, 16
+; P8-LE-NEXT:    stfiwx 0, 3, 4
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: memset2TailV1B4:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    lis 4, -23131
-; P9-LE-NEXT:    ori 4, 4, 42405
-; P9-LE-NEXT:    stw 4, 16(3)
 ; P9-LE-NEXT:    xxspltib 0, 165
+; P9-LE-NEXT:    li 4, 16
+; P9-LE-NEXT:    stfiwx 0, 3, 4
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memset2TailV1B4:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, -1515870811
-; P10-LE-NEXT:    stw 4, 16(3)
 ; P10-LE-NEXT:    xxspltib 0, 165
+; P10-LE-NEXT:    li 4, 16
+; P10-LE-NEXT:    stfiwx 0, 3, 4
 ; P10-LE-NEXT:    stxv 0, 0(3)
 ; P10-LE-NEXT:    blr
 entry:
@@ -878,26 +802,24 @@
 ; P8-BE:       # %bb.0: # %entry
 ; P8-BE-NEXT:    ld 4, L..C6(2) # %const.0
 ; P8-BE-NEXT:    lxvw4x 0, 0, 4
-; P8-BE-NEXT:    lis 4, -23131
-; P8-BE-NEXT:    ori 4, 4, 42405
-; P8-BE-NEXT:    stw 4, 15(3)
+; P8-BE-NEXT:    li 4, 15
+; P8-BE-NEXT:    stfiwx 0, 3, 4
 ; P8-BE-NEXT:    stxvw4x 0, 0, 3
 ; P8-BE-NEXT:    blr
 ;
 ; P9-BE-LABEL: memset2TailV1B3:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    lis 4, -23131
-; P9-BE-NEXT:    ori 4, 4, 42405
-; P9-BE-NEXT:    stw 4, 15(3)
 ; P9-BE-NEXT:    xxspltib 0, 165
+; P9-BE-NEXT:    li 4, 15
+; P9-BE-NEXT:    stfiwx 0, 3, 4
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memset2TailV1B3:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    pli 4, -1515870811
-; P10-BE-NEXT:    stw 4, 15(3)
 ; P10-BE-NEXT:    xxspltib 0, 165
+; P10-BE-NEXT:    li 4, 15
+; P10-BE-NEXT:    stfiwx 0, 3, 4
 ; P10-BE-NEXT:    stxv 0, 0(3)
 ; P10-BE-NEXT:    blr
 ;
@@ -906,26 +828,24 @@
 ; P8-LE-NEXT:    addis 4, 2, .LCPI15_0@toc@ha
 ; P8-LE-NEXT:    addi 4, 4, .LCPI15_0@toc@l
 ; P8-LE-NEXT:    lxvd2x 0, 0, 4
-; P8-LE-NEXT:    lis 4, -23131
-; P8-LE-NEXT:    ori 4, 4, 42405
-; P8-LE-NEXT:    stw 4, 15(3)
+; P8-LE-NEXT:    li 4, 15
+; P8-LE-NEXT:    stfiwx 0, 3, 4
 ; P8-LE-NEXT:    stxvd2x 0, 0, 3
 ; P8-LE-NEXT:    blr
 ;
 ; P9-LE-LABEL: memset2TailV1B3:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    lis 4, -23131
-; P9-LE-NEXT:    ori 4, 4, 42405
-; P9-LE-NEXT:    stw 4, 15(3)
 ; P9-LE-NEXT:    xxspltib 0, 165
+; P9-LE-NEXT:    li 4, 15
+; P9-LE-NEXT:    stfiwx 0, 3, 4
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memset2TailV1B3:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    pli 4, -1515870811
-; P10-LE-NEXT:    stw 4, 15(3)
 ; P10-LE-NEXT:    xxspltib 0, 165
+; P10-LE-NEXT:    li 4, 15
+; P10-LE-NEXT:    stfiwx 0, 3, 4
 ; P10-LE-NEXT:    stxv 0, 0(3)
 ; P10-LE-NEXT:    blr
 entry:
@@ -945,17 +865,17 @@
 ;
 ; P9-BE-LABEL: memset2TailV1B2:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    li 4, -23131
-; P9-BE-NEXT:    sth 4, 16(3)
 ; P9-BE-NEXT:    xxspltib 0, 165
+; P9-BE-NEXT:    li 4, 16
+; P9-BE-NEXT:    stxsihx 0, 3, 4
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memset2TailV1B2:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    li 4, -23131
-; P10-BE-NEXT:    sth 4, 16(3)
 ; P10-BE-NEXT:    xxspltib 0, 165
+; P10-BE-NEXT:    li 4, 16
+; P10-BE-NEXT:    stxsihx 0, 3, 4
 ; P10-BE-NEXT:    stxv 0, 0(3)
 ; P10-BE-NEXT:    blr
 ;
@@ -971,17 +891,17 @@
 ;
 ; P9-LE-LABEL: memset2TailV1B2:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    li 4, -23131
-; P9-LE-NEXT:    sth 4, 16(3)
 ; P9-LE-NEXT:    xxspltib 0, 165
+; P9-LE-NEXT:    li 4, 16
+; P9-LE-NEXT:    stxsihx 0, 3, 4
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memset2TailV1B2:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    li 4, -23131
-; P10-LE-NEXT:    sth 4, 16(3)
 ; P10-LE-NEXT:    xxspltib 0, 165
+; P10-LE-NEXT:    li 4, 16
+; P10-LE-NEXT:    stxsihx 0, 3, 4
 ; P10-LE-NEXT:    stxv 0, 0(3)
 ; P10-LE-NEXT:    blr
 entry:
@@ -1001,17 +921,17 @@
 ;
 ; P9-BE-LABEL: memset2TailV1B1:
 ; P9-BE:       # %bb.0: # %entry
-; P9-BE-NEXT:    li 4, -91
-; P9-BE-NEXT:    stb 4, 16(3)
 ; P9-BE-NEXT:    xxspltib 0, 165
+; P9-BE-NEXT:    li 4, 16
+; P9-BE-NEXT:    stxsibx 0, 3, 4
 ; P9-BE-NEXT:    stxv 0, 0(3)
 ; P9-BE-NEXT:    blr
 ;
 ; P10-BE-LABEL: memset2TailV1B1:
 ; P10-BE:       # %bb.0: # %entry
-; P10-BE-NEXT:    li 4, -91
-; P10-BE-NEXT:    stb 4, 16(3)
 ; P10-BE-NEXT:    xxspltib 0, 165
+; P10-BE-NEXT:    li 4, 16
+; P10-BE-NEXT:    stxsibx 0, 3, 4
 ; P10-BE-NEXT:    stxv 0, 0(3)
 ; P10-BE-NEXT:    blr
 ;
@@ -1027,17 +947,17 @@
 ;
 ; P9-LE-LABEL: memset2TailV1B1:
 ; P9-LE:       # %bb.0: # %entry
-; P9-LE-NEXT:    li 4, -91
-; P9-LE-NEXT:    stb 4, 16(3)
 ; P9-LE-NEXT:    xxspltib 0, 165
+; P9-LE-NEXT:    li 4, 16
+; P9-LE-NEXT:    stxsibx 0, 3, 4
 ; P9-LE-NEXT:    stxv 0, 0(3)
 ; P9-LE-NEXT:    blr
 ;
 ; P10-LE-LABEL: memset2TailV1B1:
 ; P10-LE:       # %bb.0: # %entry
-; P10-LE-NEXT:    li 4, -91
-; P10-LE-NEXT:    stb 4, 16(3)
 ; P10-LE-NEXT:    xxspltib 0, 165
+; P10-LE-NEXT:    li 4, 16
+; P10-LE-NEXT:    stxsibx 0, 3, 4
 ; P10-LE-NEXT:    stxv 0, 0(3)
 ; P10-LE-NEXT:    blr
 entry: