[PowerPC] Unify handling for conversion of FP_TO_INT feeding a store

[lei]

Summary

Existing DAG combine only handles conversions for:

`{ FP_TO_SINT (f32, f64) } x { i32, i16 }

This patch simplifies the code to handle:

`{ FP_TO_SINT, FP_TO_UINT } x { f64, f32 } x { i64, i32, i16, i8 }`

[nemanjai]

The code changes required are minor, but there's a few so I'd prefer to see another review of this patch.

lib/Target/PowerPC/PPCISelLowering.cpp

1161

Hmm... turns out the names are pretty long. Please drop the CV_ prefix from both.

1218

This one is pretty long too. Maybe ST_VSR_SCAL_INT?

12235

Nit: formatting. The parameters should be aligned.

12258

Floating point types smaller than 32 bits are not legal on Power. I think you should just exit early if the type has a width less than 32 bits and only extend if if has a width of 32 bits (since that extend is free).
Especially since you don't have a test case for this code path.

lib/Target/PowerPC/PPCInstrVSX.td

1469

This introduces ambiguity for the selector and it may result in unpredictable results from ISEL. The reason is that this pattern has the exact same complexity and code size as the pair in the HasP9Vector block. What you should do is guard the STXSDX patterns with the additional NoP9Vector predicate.

3170

Add to this comment that the 8-byte version is repeated here due to the availability of D-Form STXSD.

[lei]

lib/Target/PowerPC/PPCInstrVSX.td

1469

But the pattern in the HasP9Vector bloc is for xaddr while this one is for xoaddr. Does that not differentiate the two patterns?

[nemanjai]

lib/Target/PowerPC/PPCInstrVSX.td

1469

That isn't adequate because xoaddr cannot fail and fall back on ixaddr. So if the selector tries to match the pattern that has the xoaddr, it will succeed every time making it impossible to select the D-Form version.

[lei]

Addressed all review comments.

[nemanjai]

Thanks for addressing everything so quickly. LGTM.

lib/Target/PowerPC/PPCISelLowering.cpp

12277

Nit: Spaces around infix operators.

lib/Target/PowerPC/PPCISelLowering.h

enum NodeType : unsigned {
       /// operand, producing an f64 value containing the integer representation
       /// of that FP value.
       FCTIDZ, FCTIWZ,
 
       /// Newer FCTI[D,W]UZ floating-point-to-integer conversion instructions for
       /// unsigned integers with round toward zero.
       FCTIDUZ, FCTIWUZ,
 
+      /// Floating-point-to-interger conversion instructions
+      CV_FP_TO_UINT_IN_VSR, CV_FP_TO_SINT_IN_VSR,
+
       /// VEXTS, ByteWidth - takes an input in VSFRC and produces an output in
       /// VSFRC that is sign-extended from ByteWidth to a 64-byte integer.
       VEXTS,
 
       /// SExtVElems, takes an input vector of a smaller type and sign
       /// extends to an output vector of a larger type.
       SExtVElems,
 
enum NodeType : unsigned {
       /// an xxswapd.
       LXVD2X,
 
       /// CHAIN = STXVD2X CHAIN, VSRC, Ptr - Occurs only for little endian.
       /// Maps directly to an stxvd2x instruction that will be preceded by
       /// an xxswapd.
       STXVD2X,
 
+      /// Store scalar integers from VSR.
+      STORE_SCAL_INT_FROM_VSR,
+
       /// QBRC, CHAIN = QVLFSb CHAIN, Ptr
       /// The 4xf32 load used for v4i1 constants.
       QVLFSb,
 
       /// ATOMIC_CMP_SWAP - the exact same as the target-independent nodes
       /// except they ensure that the compare input is zero-extended for
       /// sub-word versions because the atomic loads zero-extend.
       ATOMIC_CMP_SWAP_8, ATOMIC_CMP_SWAP_16,
SDValue LowerCall_32SVR4(SDValue Chain, SDValue Callee,
                              ImmutableCallSite CS) const;
 
     SDValue lowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const;
     SDValue lowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const;
 
     SDValue DAGCombineExtBoolTrunc(SDNode *N, DAGCombinerInfo &DCI) const;
     SDValue DAGCombineBuildVector(SDNode *N, DAGCombinerInfo &DCI) const;
     SDValue DAGCombineTruncBoolExt(SDNode *N, DAGCombinerInfo &DCI) const;
+    SDValue combineStoreFPToInt(SDNode *N, DAGCombinerInfo &DCI) const;
     SDValue combineFPToIntToFP(SDNode *N, DAGCombinerInfo &DCI) const;
     SDValue combineSHL(SDNode *N, DAGCombinerInfo &DCI) const;
     SDValue combineSRA(SDNode *N, DAGCombinerInfo &DCI) const;
     SDValue combineSRL(SDNode *N, DAGCombinerInfo &DCI) const;
 
     /// ConvertSETCCToSubtract - looks at SETCC that compares ints. It replaces
     /// SETCC with integer subtraction when (1) there is a legal way of doing it
     /// (2) keeping the result of comparison in GPR has performance benefit.

lib/Target/PowerPC/PPCISelLowering.cpp

const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const {
   case PPCISD::FCFID:           return "PPCISD::FCFID";
   case PPCISD::FCFIDU:          return "PPCISD::FCFIDU";
   case PPCISD::FCFIDS:          return "PPCISD::FCFIDS";
   case PPCISD::FCFIDUS:         return "PPCISD::FCFIDUS";
   case PPCISD::FCTIDZ:          return "PPCISD::FCTIDZ";
   case PPCISD::FCTIWZ:          return "PPCISD::FCTIWZ";
   case PPCISD::FCTIDUZ:         return "PPCISD::FCTIDUZ";
   case PPCISD::FCTIWUZ:         return "PPCISD::FCTIWUZ";
+  case PPCISD::CV_FP_TO_UINT_IN_VSR:
+                                return "PPCISD::CV_FP_TO_UINT_IN_VSR,";
+  case PPCISD::CV_FP_TO_SINT_IN_VSR:
+                                return "PPCISD::CV_FP_TO_SINT_IN_VSR";
   case PPCISD::FRE:             return "PPCISD::FRE";
   case PPCISD::FRSQRTE:         return "PPCISD::FRSQRTE";
   case PPCISD::STFIWX:          return "PPCISD::STFIWX";
   case PPCISD::VMADDFP:         return "PPCISD::VMADDFP";
   case PPCISD::VNMSUBFP:        return "PPCISD::VNMSUBFP";
   case PPCISD::VPERM:           return "PPCISD::VPERM";
   case PPCISD::XXSPLT:          return "PPCISD::XXSPLT";
   case PPCISD::VECINSERT:       return "PPCISD::VECINSERT";
const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const {
   case PPCISD::LFIWAX:          return "PPCISD::LFIWAX";
   case PPCISD::LFIWZX:          return "PPCISD::LFIWZX";
   case PPCISD::LXSIZX:          return "PPCISD::LXSIZX";
   case PPCISD::STXSIX:          return "PPCISD::STXSIX";
   case PPCISD::VEXTS:           return "PPCISD::VEXTS";
   case PPCISD::SExtVElems:      return "PPCISD::SExtVElems";
   case PPCISD::LXVD2X:          return "PPCISD::LXVD2X";
   case PPCISD::STXVD2X:         return "PPCISD::STXVD2X";
+  case PPCISD::STORE_SCAL_INT_FROM_VSR:
+                                return "PPCISD::STORE_SCAL_INT_FROM_VSR";
   case PPCISD::COND_BRANCH:     return "PPCISD::COND_BRANCH";
   case PPCISD::BDNZ:            return "PPCISD::BDNZ";
   case PPCISD::BDZ:             return "PPCISD::BDZ";
   case PPCISD::MFFS:            return "PPCISD::MFFS";
   case PPCISD::FADDRTZ:         return "PPCISD::FADDRTZ";
   case PPCISD::TC_RETURN:       return "PPCISD::TC_RETURN";
   case PPCISD::CR6SET:          return "PPCISD::CR6SET";
   case PPCISD::CR6UNSET:        return "PPCISD::CR6UNSET";
SDValue PPCTargetLowering::expandVSXStoreForLE(SDNode *N,
   SDValue StoreOps[] = { Chain, Swap, Base };
   SDValue Store = DAG.getMemIntrinsicNode(PPCISD::STXVD2X, dl,
                                           DAG.getVTList(MVT::Other),
                                           StoreOps, VecTy, MMO);
   DCI.AddToWorklist(Store.getNode());
   return Store;
 }
 
+// Handle DAG combine for STORE (FP_TO_INT F).
+SDValue PPCTargetLowering::combineStoreFPToInt(SDNode *N,
+                                  DAGCombinerInfo &DCI) const {
+
+  SelectionDAG &DAG = DCI.DAG;
+  SDLoc dl(N);
+  unsigned Opcode = N->getOperand(1).getOpcode();
+
+  assert((Opcode == ISD::FP_TO_SINT || Opcode == ISD::FP_TO_UINT)
+         && "Not a FP_TO_INT Instruction!");
+
+  SDValue Val = N->getOperand(1).getOperand(0);
+  EVT Op1VT = N->getOperand(1).getValueType();
+  EVT ResVT = Val.getValueType();
+
+  // Only perform combine for conversion to i64/i32 or power9 i16/i8.
+  bool ValidTypeForStoreFltAsInt =
+        (Op1VT == MVT::i32 || Op1VT == MVT::i64 ||
+         (Subtarget.hasP9Vector() && (Op1VT == MVT::i16 || Op1VT == MVT::i8)));
+
+  if (ResVT == MVT::ppcf128 || !Subtarget.hasP8Altivec() ||
+      cast<StoreSDNode>(N)->isTruncatingStore() || !ValidTypeForStoreFltAsInt)
+    return SDValue();
+
+  // Extend f32/f16/f8 values to f64
+  if (ResVT.getScalarSizeInBits() <= 32) {
+    Val = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Val);
+    DCI.AddToWorklist(Val.getNode());
+  }
+
+  // Set signed or unsigned conversion opcode.
+  unsigned ConvOpcode = (Opcode == ISD::FP_TO_SINT) ?
+                          PPCISD::CV_FP_TO_SINT_IN_VSR :
+                          PPCISD::CV_FP_TO_UINT_IN_VSR;
+
+  Val = DAG.getNode(ConvOpcode,
+                    dl, ResVT == MVT::f128 ? MVT::f128 : MVT::f64, Val);
+  DCI.AddToWorklist(Val.getNode());
+
+  // Set number of bytes being converted.
+  unsigned ByteSize=Op1VT.getScalarSizeInBits()/8;
+  SDValue Ops[] = { N->getOperand(0), Val, N->getOperand(2),
+                    DAG.getIntPtrConstant(ByteSize, dl, false),
+                    DAG.getValueType(Op1VT) };
+
+  Val = DAG.getMemIntrinsicNode(PPCISD::STORE_SCAL_INT_FROM_VSR, dl,
+          DAG.getVTList(MVT::Other), Ops,
+          cast<StoreSDNode>(N)->getMemoryVT(),
+          cast<StoreSDNode>(N)->getMemOperand());
+
+  DCI.AddToWorklist(Val.getNode());
+  return Val;
+}
+
 SDValue PPCTargetLowering::PerformDAGCombine(SDNode *N,
                                              DAGCombinerInfo &DCI) const {
   SelectionDAG &DAG = DCI.DAG;
   SDLoc dl(N);
   switch (N->getOpcode()) {
   default: break;
   case ISD::SHL:
     return combineSHL(N, DCI);
SDValue PPCTargetLowering::PerformDAGCombine(SDNode *N,
   case ISD::TRUNCATE:
   case ISD::SETCC:
   case ISD::SELECT_CC:
     return DAGCombineTruncBoolExt(N, DCI);
   case ISD::SINT_TO_FP:
   case ISD::UINT_TO_FP:
     return combineFPToIntToFP(N, DCI);
   case ISD::STORE: {
-    EVT Op1VT = N->getOperand(1).getValueType();
-    bool ValidTypeForStoreFltAsInt = (Op1VT == MVT::i32) ||
-      (Subtarget.hasP9Vector() && (Op1VT == MVT::i8 || Op1VT == MVT::i16));
-
-    // Turn STORE (FP_TO_SINT F) -> STFIWX(FCTIWZ(F)).
-    if (Subtarget.hasSTFIWX() && !cast<StoreSDNode>(N)->isTruncatingStore() &&
-        N->getOperand(1).getOpcode() == ISD::FP_TO_SINT &&
-        ValidTypeForStoreFltAsInt &&
-        N->getOperand(1).getOperand(0).getValueType() != MVT::ppcf128) {
-      SDValue Val = N->getOperand(1).getOperand(0);
-      if (Val.getValueType() == MVT::f32) {
-        Val = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Val);
-        DCI.AddToWorklist(Val.getNode());
-      }
-      Val = DAG.getNode(PPCISD::FCTIWZ, dl, MVT::f64, Val);
-      DCI.AddToWorklist(Val.getNode());
-
-      if (Op1VT == MVT::i32) {
-        SDValue Ops[] = {
-          N->getOperand(0), Val, N->getOperand(2),
-          DAG.getValueType(N->getOperand(1).getValueType())
-        };
 
-        Val = DAG.getMemIntrinsicNode(PPCISD::STFIWX, dl,
-                DAG.getVTList(MVT::Other), Ops,
-                cast<StoreSDNode>(N)->getMemoryVT(),
-                cast<StoreSDNode>(N)->getMemOperand());
-      } else {
-        unsigned WidthInBytes =
-          N->getOperand(1).getValueType() == MVT::i8 ? 1 : 2;
-        SDValue WidthConst = DAG.getIntPtrConstant(WidthInBytes, dl, false);
-
-        SDValue Ops[] = {
-          N->getOperand(0), Val, N->getOperand(2), WidthConst,
-          DAG.getValueType(N->getOperand(1).getValueType())
-        };
-        Val = DAG.getMemIntrinsicNode(PPCISD::STXSIX, dl,
-                                      DAG.getVTList(MVT::Other), Ops,
-                                      cast<StoreSDNode>(N)->getMemoryVT(),
-                                      cast<StoreSDNode>(N)->getMemOperand());
-      }
+    EVT Op1VT = N->getOperand(1).getValueType();
+    unsigned Opcode = N->getOperand(1).getOpcode();
 
-      DCI.AddToWorklist(Val.getNode());
+    if (Opcode == ISD::FP_TO_SINT || Opcode == ISD::FP_TO_UINT) {
+      SDValue Val= combineStoreFPToInt(N, DCI);
+      if (Val)
         return Val;
     }
 
     // Turn STORE (BSWAP) -> sthbrx/stwbrx.
-    if (cast<StoreSDNode>(N)->isUnindexed() &&
-        N->getOperand(1).getOpcode() == ISD::BSWAP &&
+    if (cast<StoreSDNode>(N)->isUnindexed() && Opcode == ISD::BSWAP &&
         N->getOperand(1).getNode()->hasOneUse() &&
-        (N->getOperand(1).getValueType() == MVT::i32 ||
-         N->getOperand(1).getValueType() == MVT::i16 ||
-         (Subtarget.hasLDBRX() && Subtarget.isPPC64() &&
-          N->getOperand(1).getValueType() == MVT::i64))) {
+        (Op1VT == MVT::i32 || Op1VT == MVT::i16 ||
+         (Subtarget.hasLDBRX() && Subtarget.isPPC64() && Op1VT == MVT::i64))) {
+
       // STBRX can only handle simple types.
       EVT mVT = cast<StoreSDNode>(N)->getMemoryVT();
       if (mVT.isExtended())
         break;
 
       SDValue BSwapOp = N->getOperand(1).getOperand(0);
       // Do an any-extend to 32-bits if this is a half-word input.
       if (BSwapOp.getValueType() == MVT::i16)
if (cast<StoreSDNode>(N)->isUnindexed() && Opcode == ISD::BSWAP &&
       return
         DAG.getMemIntrinsicNode(PPCISD::STBRX, dl, DAG.getVTList(MVT::Other),
                                 Ops, cast<StoreSDNode>(N)->getMemoryVT(),
                                 cast<StoreSDNode>(N)->getMemOperand());
     }
 
     // STORE Constant:i32<0>  ->  STORE<trunc to i32> Constant:i64<0>
     // So it can increase the chance of CSE constant construction.
-    EVT VT = N->getOperand(1).getValueType();
     if (Subtarget.isPPC64() && !DCI.isBeforeLegalize() &&
-        isa<ConstantSDNode>(N->getOperand(1)) && VT == MVT::i32) {
+        isa<ConstantSDNode>(N->getOperand(1)) && Op1VT == MVT::i32) {
       // Need to sign-extended to 64-bits to handle negative values.
       EVT MemVT = cast<StoreSDNode>(N)->getMemoryVT();
       uint64_t Val64 = SignExtend64(N->getConstantOperandVal(1),
                                     MemVT.getSizeInBits());
       SDValue Const64 = DAG.getConstant(Val64, dl, MVT::i64);
 
       // DAG.getTruncStore() can't be used here because it doesn't accept
       // the general (base + offset) addressing mode.
       // So we use UpdateNodeOperands and setTruncatingStore instead.
       DAG.UpdateNodeOperands(N, N->getOperand(0), Const64, N->getOperand(2),
                              N->getOperand(3));
       cast<StoreSDNode>(N)->setTruncatingStore(true);
       return SDValue(N, 0);
     }
 
     // For little endian, VSX stores require generating xxswapd/lxvd2x.
     // Not needed on ISA 3.0 based CPUs since we have a non-permuting store.
-    if (VT.isSimple()) {
-      MVT StoreVT = VT.getSimpleVT();
+    if (Op1VT.isSimple()) {
+      MVT StoreVT = Op1VT.getSimpleVT();
       if (Subtarget.needsSwapsForVSXMemOps() &&
           (StoreVT == MVT::v2f64 || StoreVT == MVT::v2i64 ||
            StoreVT == MVT::v4f32 || StoreVT == MVT::v4i32))
         return expandVSXStoreForLE(N, DCI);
     }
     break;
   }
   case ISD::LOAD: {

lib/Target/PowerPC/PPCInstrInfo.td

def SDT_PPClfiwx : SDTypeProfile<1, 1, [ // lfiw[az]x
   SDTCisVT<0, f64>, SDTCisPtrTy<1>
 ]>;
 def SDT_PPCLxsizx : SDTypeProfile<1, 2, [
   SDTCisVT<0, f64>, SDTCisPtrTy<1>, SDTCisPtrTy<2>
 ]>;
 def SDT_PPCstxsix : SDTypeProfile<0, 3, [
   SDTCisVT<0, f64>, SDTCisPtrTy<1>, SDTCisPtrTy<2>
 ]>;
+def SDT_PPCcv_fp_to_int  : SDTypeProfile<1, 1, [
+  SDTCisFP<0>, SDTCisFP<1>
+  ]>;
+def SDT_PPCstore_scal_int_from_vsr : SDTypeProfile<0, 3, [
+  SDTCisVT<0, f64>, SDTCisPtrTy<1>, SDTCisPtrTy<2>
+]>;
 def SDT_PPCVexts  : SDTypeProfile<1, 2, [
   SDTCisVT<0, f64>, SDTCisVT<1, f64>, SDTCisPtrTy<2>
 ]>;
 def SDT_PPCSExtVElems  : SDTypeProfile<1, 1, [
   SDTCisVec<0>, SDTCisVec<1>
 ]>;
 
 def SDT_PPCCallSeqStart : SDCallSeqStart<[ SDTCisVT<0, i32>,

 def PPCfcfid  : SDNode<"PPCISD::FCFID",   SDTFPUnaryOp, []>;
 def PPCfcfidu : SDNode<"PPCISD::FCFIDU",  SDTFPUnaryOp, []>;
 def PPCfcfids : SDNode<"PPCISD::FCFIDS",  SDTFPRoundOp, []>;
 def PPCfcfidus: SDNode<"PPCISD::FCFIDUS", SDTFPRoundOp, []>;
 def PPCfctidz : SDNode<"PPCISD::FCTIDZ", SDTFPUnaryOp, []>;
 def PPCfctiwz : SDNode<"PPCISD::FCTIWZ", SDTFPUnaryOp, []>;
 def PPCfctiduz: SDNode<"PPCISD::FCTIDUZ",SDTFPUnaryOp, []>;
 def PPCfctiwuz: SDNode<"PPCISD::FCTIWUZ",SDTFPUnaryOp, []>;
+
+def PPCcv_fp_to_uint_in_vsr:
+    SDNode<"PPCISD::CV_FP_TO_UINT_IN_VSR", SDT_PPCcv_fp_to_int, []>;
+def PPCcv_fp_to_sint_in_vsr:
+    SDNode<"PPCISD::CV_FP_TO_SINT_IN_VSR", SDT_PPCcv_fp_to_int, []>;
+def PPCstore_scal_int_from_vsr:
+   SDNode<"PPCISD::STORE_SCAL_INT_FROM_VSR", SDT_PPCstore_scal_int_from_vsr,
+           [SDNPHasChain, SDNPMayStore]>;
 def PPCstfiwx : SDNode<"PPCISD::STFIWX", SDT_PPCstfiwx,
                        [SDNPHasChain, SDNPMayStore]>;
 def PPClfiwax : SDNode<"PPCISD::LFIWAX", SDT_PPClfiwx,
                        [SDNPHasChain, SDNPMayLoad, SDNPMemOperand]>;
 def PPClfiwzx : SDNode<"PPCISD::LFIWZX", SDT_PPClfiwx,
                        [SDNPHasChain, SDNPMayLoad, SDNPMemOperand]>;
 def PPClxsizx : SDNode<"PPCISD::LXSIZX", SDT_PPCLxsizx,
                        [SDNPHasChain, SDNPMayLoad]>;

 def STHX  : XForm_8_memOp<31, 407, (outs), (ins gprc:$rS, memrr:$dst),
                    "sthx $rS, $dst", IIC_LdStStore,
                    [(truncstorei16 i32:$rS, xaddr:$dst)]>,
                    PPC970_DGroup_Cracked;
 def STWX  : XForm_8_memOp<31, 151, (outs), (ins gprc:$rS, memrr:$dst),
                    "stwx $rS, $dst", IIC_LdStStore,
                    [(store i32:$rS, xaddr:$dst)]>,
                    PPC970_DGroup_Cracked;
- 
 def STHBRX: XForm_8_memOp<31, 918, (outs), (ins gprc:$rS, memrr:$dst),
                    "sthbrx $rS, $dst", IIC_LdStStore,
                    [(PPCstbrx i32:$rS, xoaddr:$dst, i16)]>,
                    PPC970_DGroup_Cracked;
 def STWBRX: XForm_8_memOp<31, 662, (outs), (ins gprc:$rS, memrr:$dst),
                    "stwbrx $rS, $dst", IIC_LdStStore,
                    [(PPCstbrx i32:$rS, xoaddr:$dst, i32)]>,
                    PPC970_DGroup_Cracked;
 
 def STFIWX: XForm_28_memOp<31, 983, (outs), (ins f8rc:$frS, memrr:$dst),
                      "stfiwx $frS, $dst", IIC_LdStSTFD,
                      [(PPCstfiwx f64:$frS, xoaddr:$dst)]>;
-                     
 def STFSX : XForm_28_memOp<31, 663, (outs), (ins f4rc:$frS, memrr:$dst),
                      "stfsx $frS, $dst", IIC_LdStSTFD,
                      [(store f32:$frS, xaddr:$dst)]>;
 def STFDX : XForm_28_memOp<31, 727, (outs), (ins f8rc:$frS, memrr:$dst),
                      "stfdx $frS, $dst", IIC_LdStSTFD,
                      [(store f64:$frS, xaddr:$dst)]>;
 }
 

lib/Target/PowerPC/PPCInstrVSX.td

def : Pat<(f32 (PPCfcfidus
                    (f64 (PPCmtvsra (i64 (vector_extract v2i64:$S, 0)))))),
             (f32 (XSCVUXDSP (COPY_TO_REGCLASS $S, VSFRC)))>;
   def : Pat<(f32 (PPCfcfidus
                    (f64 (PPCmtvsra (i64 (vector_extract v2i64:$S, 1)))))),
             (f32 (XSCVUXDSP (COPY_TO_REGCLASS (XXPERMDI $S, $S, 2), VSFRC)))>;
   }
   def : Pat<(v4i32 (scalar_to_vector ScalarLoads.Li32)),
             (v4i32 (XXSPLTWs (LIWAX xoaddr:$src), 1))>;
+
+  // Instructions for fptosint (i64,i32) feeding a store.
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_sint_in_vsr f64:$src)), xoaddr:$dst, 8),
+            (STXSDX (XSCVDPSXDS f64:$src), xoaddr:$dst)>;
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_sint_in_vsr f64:$src)), xoaddr:$dst, 4),
+            (STIWX (XSCVDPSXWS f64:$src), xoaddr:$dst)>;
+
+  // Instructions for fptouint (i64,i32) feeding a store.
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_uint_in_vsr f64:$src)), xoaddr:$dst, 8),
+            (STXSDX (XSCVDPUXDS f64:$src), xoaddr:$dst)>;
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_uint_in_vsr f64:$src)), xoaddr:$dst, 4),
+            (STIWX (XSCVDPUXWS f64:$src), xoaddr:$dst)>;
+
 } // AddedComplexity = 400
 } // HasP8Vector
 
 let UseVSXReg = 1, AddedComplexity = 400 in {
 let Predicates = [HasDirectMove] in {
   // VSX direct move instructions
   def MFVSRD : XX1_RS6_RD5_XO<31, 51, (outs g8rc:$rA), (ins vsfrc:$XT),
                               "mfvsrd $rA, $XT", IIC_VecGeneral,
let AddedComplexity = 400, Predicates = [HasP9Vector] in {
   // Convert Unsigned HWord in memory -> QP
   def : Pat<(f128 (uint_to_fp ScalarLoads.ZELi16)),
             (f128 (XSCVUDQP (LXSIHZX xaddr:$src)))>;
 
   // Convert Unsigned Byte in memory -> QP
   def : Pat<(f128 (uint_to_fp ScalarLoads.ZELi8)),
             (f128 (XSCVUDQP (LXSIBZX xoaddr:$src)))>;
 
-} // end HasP9Vector, AddedComplexity
+  // Instructions for fptosint (i64,i16,i8) feeding a store.
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_sint_in_vsr f64:$src)), xaddr:$dst, 8),
+            (STXSDX (XSCVDPSXDS f64:$src), xaddr:$dst)>;
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_sint_in_vsr f64:$src)), ixaddr:$dst, 8),
+            (STXSD (XSCVDPSXDS f64:$src), ixaddr:$dst)>;
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_sint_in_vsr f64:$src)), xoaddr:$dst, 2),
+            (STXSIHX (XSCVDPSXWS f64:$src), xoaddr:$dst)>;
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_sint_in_vsr f64:$src)), xoaddr:$dst, 1),
+            (STXSIBX (XSCVDPSXWS f64:$src), xoaddr:$dst)>;
+
+  // Instructions for fptouint (i64,i16,i8) feeding a store.
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_uint_in_vsr f64:$src)), xaddr:$dst, 8),
+            (STXSDX (XSCVDPUXDS f64:$src), xaddr:$dst)>;
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_uint_in_vsr f64:$src)), ixaddr:$dst, 8),
+            (STXSD (XSCVDPUXDS f64:$src), ixaddr:$dst)>;
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_uint_in_vsr f64:$src)), xoaddr:$dst, 2),
+            (STXSIHX (XSCVDPUXWS f64:$src), xoaddr:$dst)>;
+  def : Pat<(PPCstore_scal_int_from_vsr
+              (f64 (PPCcv_fp_to_uint_in_vsr f64:$src)), xoaddr:$dst, 1),
+            (STXSIBX (XSCVDPUXWS f64:$src), xoaddr:$dst)>;
 
+} // end HasP9Vector, AddedComplexity
 let Predicates = [HasP9Vector] in {
   let isPseudo = 1 in {
     let mayStore = 1 in {
       def SPILLTOVSR_STX : PseudoXFormMemOp<(outs),
                                             (ins spilltovsrrc:$XT, memrr:$dst),
                                             "#SPILLTOVSR_STX", []>;
       def SPILLTOVSR_ST : Pseudo<(outs), (ins spilltovsrrc:$XT, memrix:$dst),
                                 "#SPILLTOVSR_ST", []>;

test/CodeGen/PowerPC/store_fptoi.ll

+; RUN: llc -mcpu=pwr9 -mtriple=powerpc64le-unknown-unknown -ppc-vsr-nums-as-vr \
+; RUN:   -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -mcpu=pwr8 -mtriple=powerpc64le-unknown-unknown -ppc-vsr-nums-as-vr \
+; RUN:   -verify-machineinstrs < %s | FileCheck -check-prefix=CHECK-PWR8 %s
+
+; ==========================================
+; Tests for store of fp_to_sint converstions
+; ==========================================
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2sdw(double* nocapture readonly %a, i64* nocapture %b) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptosi double %0 to i64
+  store i64 %conv, i64* %b, align 8
+  ret void
+
+; CHECK-LABEL: dpConv2sdw
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK: xscvdpsxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsd [[CONV]], 0(4)
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2sdw
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stxsdx [[CONV]], 0, 4
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2sw(double* nocapture readonly %a, i32* nocapture %b) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptosi double %0 to i32
+  store i32 %conv, i32* %b, align 4
+  ret void
+
+; CHECK-LABEL: dpConv2sw
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stfiwx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2sw
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stfiwx [[CONV]], 0, 4
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2shw(double* nocapture readonly %a, i16* nocapture %b) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptosi double %0 to i16
+  store i16 %conv, i16* %b, align 2
+  ret void
+
+; CHECK-LABEL: dpConv2shw
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsihx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2shw
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: sth [[REG]], 0(4)
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2sb(double* nocapture readonly %a, i8* nocapture %b) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptosi double %0 to i8
+  store i8 %conv, i8* %b, align 1
+  ret void
+
+; CHECK-LABEL: dpConv2sb
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsibx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2sb
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: stb [[REG]], 0(4)
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2sdw(float* nocapture readonly %a, i64* nocapture %b) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptosi float %0 to i64
+  store i64 %conv, i64* %b, align 8
+  ret void
+
+; CHECK-LABEL: spConv2sdw
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsd [[CONV]], 0(4)
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2sdw
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stxsdx [[CONV]], 0, 4
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2sw(float* nocapture readonly %a, i32* nocapture %b) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptosi float %0 to i32
+  store i32 %conv, i32* %b, align 4
+  ret void
+
+; CHECK-LABEL: spConv2sw
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stfiwx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2sw
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stfiwx [[CONV]], 0, 4
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2shw(float* nocapture readonly %a, i16* nocapture %b) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptosi float %0 to i16
+  store i16 %conv, i16* %b, align 2
+  ret void
+
+; CHECK-LABEL: spConv2shw
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsihx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2shw
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: sth [[REG]], 0(4)
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2sb(float* nocapture readonly %a, i8* nocapture %b) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptosi float %0 to i8
+  store i8 %conv, i8* %b, align 1
+  ret void
+
+; CHECK-LABEL: spConv2sb
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsibx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2sb
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: stb [[REG]], 0(4)
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2sdw_x(double* nocapture readonly %a, i64* nocapture %b,
+                          i32 signext %idx) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptosi double %0 to i64
+  %idxprom = sext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i64, i64* %b, i64 %idxprom
+  store i64 %conv, i64* %arrayidx, align 8
+  ret void
+
+; CHECK-LABEL: dpConv2sdw_x
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 3
+; CHECK-NEXT: xscvdpsxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsdx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2sdw_x
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8: sldi [[REG:[0-9]+]], 5, 3
+; CHECK-PWR8-NEXT: xscvdpsxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stxsdx [[CONV]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2sw_x(double* nocapture readonly %a, i32* nocapture %b,
+                          i32 signext %idx) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptosi double %0 to i32
+  %idxprom = sext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i32, i32* %b, i64 %idxprom
+  store i32 %conv, i32* %arrayidx, align 4
+  ret void
+
+; CHECK-LABEL: dpConv2sw_x
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 2
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stfiwx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2sw_x
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 2
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stfiwx [[CONV]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2shw_x(double* nocapture readonly %a, i16* nocapture %b,
+                          i32 signext %idx) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptosi double %0 to i16
+  %idxprom = sext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i16, i16* %b, i64 %idxprom
+  store i16 %conv, i16* %arrayidx, align 2
+  ret void
+
+; CHECK-LABEL: dpConv2shw_x
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 1
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsihx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2shw_x
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 1
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: sthx [[REG]], 4, 5
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2sb_x(double* nocapture readonly %a, i8* nocapture %b,
+                          i32 signext %idx) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptosi double %0 to i8
+  %idxprom = sext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i8, i8* %b, i64 %idxprom
+  store i8 %conv, i8* %arrayidx, align 1
+  ret void
+
+; CHECK-LABEL: dpConv2sb_x
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsibx [[CONV]], 4, 5
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2sb_x
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: stbx [[REG]], 4, 5
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2sdw_x(float* nocapture readonly %a, i64* nocapture %b,
+                          i32 signext %idx) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptosi float %0 to i64
+  %idxprom = sext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i64, i64* %b, i64 %idxprom
+  store i64 %conv, i64* %arrayidx, align 8
+  ret void
+
+; CHECK-LABEL: spConv2sdw_x
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 3
+; CHECK-NEXT: xscvdpsxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsdx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2sdw_x
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 3
+; CHECK-PWR8-NEXT: xscvdpsxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stxsdx [[CONV]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2sw_x(float* nocapture readonly %a, i32* nocapture %b,
+                          i32 signext %idx) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptosi float %0 to i32
+  %idxprom = sext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i32, i32* %b, i64 %idxprom
+  store i32 %conv, i32* %arrayidx, align 4
+  ret void
+
+; CHECK-LABEL: spConv2sw_x
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 2
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stfiwx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2sw_x
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 2
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stfiwx [[CONV]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2shw_x(float* nocapture readonly %a, i16* nocapture %b,
+                          i32 signext %idx) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptosi float %0 to i16
+  %idxprom = sext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i16, i16* %b, i64 %idxprom
+  store i16 %conv, i16* %arrayidx, align 2
+  ret void
+
+; CHECK-LABEL: spConv2shw_x
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK: sldi [[REG:[0-9]+]], 5, 1
+; CHECK: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsihx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2shw_x
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 1
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG2:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: sthx [[REG2]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2sb_x(float* nocapture readonly %a, i8* nocapture %b,
+                          i32 signext %idx) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptosi float %0 to i8
+  %idxprom = sext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i8, i8* %b, i64 %idxprom
+  store i8 %conv, i8* %arrayidx, align 1
+  ret void
+
+; CHECK-LABEL: spConv2sb_x
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsibx [[CONV]], 4, 5
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2sb_x
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: stbx [[REG]], 4, 5
+; CHECK-PWR8-NEXT: blr
+}
+
+; ==========================================
+; Tests for store of fp_to_uint converstions
+; ==========================================
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2udw(double* nocapture readonly %a, i64* nocapture %b) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptoui double %0 to i64
+  store i64 %conv, i64* %b, align 8
+  ret void
+
+; CHECK-LABEL: dpConv2udw
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK: xscvdpuxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsd [[CONV]], 0(4)
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2udw
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpuxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stxsdx [[CONV]], 0, 4
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2uw(double* nocapture readonly %a, i32* nocapture %b) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptoui double %0 to i32
+  store i32 %conv, i32* %b, align 4
+  ret void
+
+; CHECK-LABEL: dpConv2uw
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stfiwx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2uw
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stfiwx [[CONV]], 0, 4
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2uhw(double* nocapture readonly %a, i16* nocapture %b) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptoui double %0 to i16
+  store i16 %conv, i16* %b, align 2
+  ret void
+
+; CHECK-LABEL: dpConv2uhw
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsihx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2uhw
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: sth [[REG]], 0(4)
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2ub(double* nocapture readonly %a, i8* nocapture %b) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptoui double %0 to i8
+  store i8 %conv, i8* %b, align 1
+  ret void
+
+; CHECK-LABEL: dpConv2ub
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsibx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2ub
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: stb [[REG]], 0(4)
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2udw(float* nocapture readonly %a, i64* nocapture %b) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptoui float %0 to i64
+  store i64 %conv, i64* %b, align 8
+  ret void
+
+; CHECK-LABEL: spConv2udw
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsd [[CONV]], 0(4)
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2udw
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpuxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stxsdx [[CONV]], 0, 4
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2uw(float* nocapture readonly %a, i32* nocapture %b) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptoui float %0 to i32
+  store i32 %conv, i32* %b, align 4
+  ret void
+
+; CHECK-LABEL: spConv2uw
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stfiwx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2uw
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stfiwx [[CONV]], 0, 4
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2uhw(float* nocapture readonly %a, i16* nocapture %b) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptoui float %0 to i16
+  store i16 %conv, i16* %b, align 2
+  ret void
+
+; CHECK-LABEL: spConv2uhw
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsihx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2uhw
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: sth [[REG]], 0(4)
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2ub(float* nocapture readonly %a, i8* nocapture %b) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptoui float %0 to i8
+  store i8 %conv, i8* %b, align 1
+  ret void
+
+; CHECK-LABEL: spConv2ub
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsibx [[CONV]], 0, 4
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2ub
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: stb [[REG]], 0(4)
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2udw_x(double* nocapture readonly %a, i64* nocapture %b,
+                          i32 zeroext %idx) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptoui double %0 to i64
+  %idxprom = zext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i64, i64* %b, i64 %idxprom
+  store i64 %conv, i64* %arrayidx, align 8
+  ret void
+
+; CHECK-LABEL: dpConv2udw_x
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 3
+; CHECK-NEXT: xscvdpuxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsdx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2udw_x
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8: sldi [[REG:[0-9]+]], 5, 3
+; CHECK-PWR8-NEXT: xscvdpuxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stxsdx [[CONV]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2uw_x(double* nocapture readonly %a, i32* nocapture %b,
+                          i32 zeroext %idx) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptoui double %0 to i32
+  %idxprom = zext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i32, i32* %b, i64 %idxprom
+  store i32 %conv, i32* %arrayidx, align 4
+  ret void
+
+; CHECK-LABEL: dpConv2uw_x
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 2
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stfiwx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2uw_x
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 2
+; CHECK-PWR8-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stfiwx [[CONV]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2uhw_x(double* nocapture readonly %a, i16* nocapture %b,
+                          i32 zeroext %idx) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptoui double %0 to i16
+  %idxprom = zext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i16, i16* %b, i64 %idxprom
+  store i16 %conv, i16* %arrayidx, align 2
+  ret void
+
+; CHECK-LABEL: dpConv2uhw_x
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 1
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsihx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2uhw_x
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 1
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: sthx [[REG]], 4, 5
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @dpConv2ub_x(double* nocapture readonly %a, i8* nocapture %b,
+                          i32 zeroext %idx) {
+entry:
+  %0 = load double, double* %a, align 8
+  %conv = fptoui double %0 to i8
+  %idxprom = zext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i8, i8* %b, i64 %idxprom
+  store i8 %conv, i8* %arrayidx, align 1
+  ret void
+
+; CHECK-LABEL: dpConv2ub_x
+; CHECK: lfd [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsibx [[CONV]], 4, 5
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: dpConv2ub_x
+; CHECK-PWR8: lxsdx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: stbx [[REG]], 4, 5
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2udw_x(float* nocapture readonly %a, i64* nocapture %b,
+                          i32 zeroext %idx) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptoui float %0 to i64
+  %idxprom = zext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i64, i64* %b, i64 %idxprom
+  store i64 %conv, i64* %arrayidx, align 8
+  ret void
+
+; CHECK-LABEL: spConv2udw_x
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 3
+; CHECK-NEXT: xscvdpuxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsdx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2udw_x
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 3
+; CHECK-PWR8-NEXT: xscvdpuxds [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stxsdx [[CONV]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2uw_x(float* nocapture readonly %a, i32* nocapture %b,
+                          i32 zeroext %idx) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptoui float %0 to i32
+  %idxprom = zext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i32, i32* %b, i64 %idxprom
+  store i32 %conv, i32* %arrayidx, align 4
+  ret void
+
+; CHECK-LABEL: spConv2uw_x
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: sldi [[REG:[0-9]+]], 5, 2
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stfiwx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2uw_x
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 2
+; CHECK-PWR8-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: stfiwx [[CONV]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2uhw_x(float* nocapture readonly %a, i16* nocapture %b,
+                          i32 zeroext %idx) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptoui float %0 to i16
+  %idxprom = zext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i16, i16* %b, i64 %idxprom
+  store i16 %conv, i16* %arrayidx, align 2
+  ret void
+
+; CHECK-LABEL: spConv2uhw_x
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK: sldi [[REG:[0-9]+]], 5, 1
+; CHECK: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsihx [[CONV]], 4, [[REG]]
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2uhw_x
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: sldi [[REG:[0-9]+]], 5, 1
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG2:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: sthx [[REG2]], 4, [[REG]]
+; CHECK-PWR8-NEXT: blr
+}
+
+; Function Attrs: norecurse nounwind
+define void @spConv2ub_x(float* nocapture readonly %a, i8* nocapture %b,
+                          i32 zeroext %idx) {
+entry:
+  %0 = load float, float* %a, align 4
+  %conv = fptoui float %0 to i8
+  %idxprom = zext i32 %idx to i64
+  %arrayidx = getelementptr inbounds i8, i8* %b, i64 %idxprom
+  store i8 %conv, i8* %arrayidx, align 1
+  ret void
+
+; CHECK-LABEL: spConv2ub_x
+; CHECK: lfs [[LD:[0-9]+]], 0(3)
+; CHECK-NEXT: xscvdpuxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-NEXT: stxsibx [[CONV]], 4, 5
+; CHECK-NEXT: blr
+
+; CHECK-PWR8-LABEL: spConv2ub_x
+; CHECK-PWR8: lfsx [[LD:[0-9]+]], 0, 3
+; CHECK-PWR8-NEXT: xscvdpsxws [[CONV:[0-9]+]], [[LD]]
+; CHECK-PWR8-NEXT: mfvsrwz [[REG:[0-9]+]], [[CONV]]
+; CHECK-PWR8-NEXT: stbx [[REG]], 4, 5
+; CHECK-PWR8-NEXT: blr
+}