Temporarily Revert "Nuke the old JIT." as it's not quite ready to

[oota-llvm.git] / lib / Target / PowerPC / PPCISelLowering.cpp

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 4028fedb6c5e575cac3d7327bde65e02c2f2b531..36e1e1334e5b1a83925aeede13ef3580b7870cf2 100644 (file)
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -858,8 +858,7 @@ static bool isConstantOrUndef(int Op, int Val) {
 /// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
 bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
                                SelectionDAG &DAG) {
-  bool IsLE =
-      DAG.getTarget().getSubtargetImpl()->getDataLayout()->isLittleEndian();
+  bool IsLE = DAG.getSubtarget().getDataLayout()->isLittleEndian();
   if (ShuffleKind == 0) {
     if (IsLE)
       return false;
@@ -890,8 +889,7 @@ bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
 /// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
 bool PPC::isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
                                SelectionDAG &DAG) {
-  bool IsLE =
-      DAG.getTarget().getSubtargetImpl()->getDataLayout()->isLittleEndian();
+  bool IsLE = DAG.getSubtarget().getDataLayout()->isLittleEndian();
   if (ShuffleKind == 0) {
     if (IsLE)
       return false;
@@ -946,7 +944,7 @@ static bool isVMerge(ShuffleVectorSDNode *N, unsigned UnitSize,
 /// the input operands are swapped (see PPCInstrAltivec.td).
 bool PPC::isVMRGLShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
                              unsigned ShuffleKind, SelectionDAG &DAG) {
-  if (DAG.getTarget().getSubtargetImpl()->getDataLayout()->isLittleEndian()) {
+  if (DAG.getSubtarget().getDataLayout()->isLittleEndian()) {
     if (ShuffleKind == 1) // unary
       return isVMerge(N, UnitSize, 0, 0);
     else if (ShuffleKind == 2) // swapped
@@ -971,7 +969,7 @@ bool PPC::isVMRGLShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
 /// the input operands are swapped (see PPCInstrAltivec.td).
 bool PPC::isVMRGHShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
                              unsigned ShuffleKind, SelectionDAG &DAG) {
-  if (DAG.getTarget().getSubtargetImpl()->getDataLayout()->isLittleEndian()) {
+  if (DAG.getSubtarget().getDataLayout()->isLittleEndian()) {
     if (ShuffleKind == 1) // unary
       return isVMerge(N, UnitSize, 8, 8);
     else if (ShuffleKind == 2) // swapped
@@ -991,7 +989,12 @@ bool PPC::isVMRGHShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
 
 /// isVSLDOIShuffleMask - If this is a vsldoi shuffle mask, return the shift
 /// amount, otherwise return -1.
-int PPC::isVSLDOIShuffleMask(SDNode *N, bool isUnary, SelectionDAG &DAG) {
+/// The ShuffleKind distinguishes between big-endian operations with two 
+/// different inputs (0), either-endian operations with two identical inputs
+/// (1), and little-endian operations with two different inputs (2).  For the
+/// latter, the input operands are swapped (see PPCInstrAltivec.td).
+int PPC::isVSLDOIShuffleMask(SDNode *N, unsigned ShuffleKind,
+                             SelectionDAG &DAG) {
   if (N->getValueType(0) != MVT::v16i8)
     return -1;
 
@@ -1009,38 +1012,26 @@ int PPC::isVSLDOIShuffleMask(SDNode *N, bool isUnary, SelectionDAG &DAG) {
   unsigned ShiftAmt = SVOp->getMaskElt(i);
   if (ShiftAmt < i) return -1;
 
-  if (DAG.getTarget().getSubtargetImpl()->getDataLayout()->isLittleEndian()) {
-
-    ShiftAmt += i;
-
-    if (!isUnary) {
-      // Check the rest of the elements to see if they are consecutive.
-      for (++i; i != 16; ++i)
-        if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt - i))
-          return -1;
-    } else {
-      // Check the rest of the elements to see if they are consecutive.
-      for (++i; i != 16; ++i)
-        if (!isConstantOrUndef(SVOp->getMaskElt(i), (ShiftAmt - i) & 15))
-          return -1;
-    }
+  ShiftAmt -= i;
+  bool isLE = DAG.getTarget().getSubtargetImpl()->getDataLayout()->
+    isLittleEndian();
 
-  } else {  // Big Endian
+  if ((ShuffleKind == 0 && !isLE) || (ShuffleKind == 2 && isLE)) {
+    // Check the rest of the elements to see if they are consecutive.
+    for (++i; i != 16; ++i)
+      if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt+i))
+        return -1;
+  } else if (ShuffleKind == 1) {
+    // Check the rest of the elements to see if they are consecutive.
+    for (++i; i != 16; ++i)
+      if (!isConstantOrUndef(SVOp->getMaskElt(i), (ShiftAmt+i) & 15))
+        return -1;
+  } else
+    return -1;
 
-    ShiftAmt -= i;
+  if (ShuffleKind == 2 && isLE)
+    ShiftAmt = 16 - ShiftAmt;
 
-    if (!isUnary) {
-      // Check the rest of the elements to see if they are consecutive.
-      for (++i; i != 16; ++i)
-        if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt+i))
-          return -1;
-    } else {
-      // Check the rest of the elements to see if they are consecutive.
-      for (++i; i != 16; ++i)
-        if (!isConstantOrUndef(SVOp->getMaskElt(i), (ShiftAmt+i) & 15))
-          return -1;
-    }
-  }
   return ShiftAmt;
 }
 
@@ -1096,7 +1087,7 @@ unsigned PPC::getVSPLTImmediate(SDNode *N, unsigned EltSize,
                                 SelectionDAG &DAG) {
   ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
   assert(isSplatShuffleMask(SVOp, EltSize));
-  if (DAG.getTarget().getSubtargetImpl()->getDataLayout()->isLittleEndian())
+  if (DAG.getSubtarget().getDataLayout()->isLittleEndian())
     return (16 / EltSize) - 1 - (SVOp->getMaskElt(0) / EltSize);
   else
     return SVOp->getMaskElt(0) / EltSize;
@@ -2395,8 +2386,8 @@ PPCTargetLowering::LowerFormalArguments_32SVR4(
 
   // Assign locations to all of the incoming arguments.
   SmallVector<CCValAssign, 16> ArgLocs;
-  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
-                 getTargetMachine(), ArgLocs, *DAG.getContext());
+  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
+                 *DAG.getContext());
 
   // Reserve space for the linkage area on the stack.
   unsigned LinkageSize = PPCFrameLowering::getLinkageSize(false, false, false);
@@ -2470,7 +2461,7 @@ PPCTargetLowering::LowerFormalArguments_32SVR4(
   // caller's stack frame, right above the parameter list area.
   SmallVector<CCValAssign, 16> ByValArgLocs;
   CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(),
-                      getTargetMachine(), ByValArgLocs, *DAG.getContext());
+                      ByValArgLocs, *DAG.getContext());
 
   // Reserve stack space for the allocations in CCInfo.
   CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrByteSize);
@@ -3752,8 +3743,8 @@ PPCTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
                                    SmallVectorImpl<SDValue> &InVals) const {
 
   SmallVector<CCValAssign, 16> RVLocs;
-  CCState CCRetInfo(CallConv, isVarArg, DAG.getMachineFunction(),
-                    getTargetMachine(), RVLocs, *DAG.getContext());
+  CCState CCRetInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
+                    *DAG.getContext());
   CCRetInfo.AnalyzeCallResult(Ins, RetCC_PPC);
 
   // Copy all of the result registers out of their specified physreg.
@@ -3968,8 +3959,8 @@ PPCTargetLowering::LowerCall_32SVR4(SDValue Chain, SDValue Callee,
 
   // Assign locations to all of the outgoing arguments.
   SmallVector<CCValAssign, 16> ArgLocs;
-  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
-                 getTargetMachine(), ArgLocs, *DAG.getContext());
+  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
+                 *DAG.getContext());
 
   // Reserve space for the linkage area on the stack.
   CCInfo.AllocateStack(PPCFrameLowering::getLinkageSize(false, false, false),
@@ -4010,7 +4001,7 @@ PPCTargetLowering::LowerCall_32SVR4(SDValue Chain, SDValue Callee,
   // Assign locations to all of the outgoing aggregate by value arguments.
   SmallVector<CCValAssign, 16> ByValArgLocs;
   CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(),
-                      getTargetMachine(), ByValArgLocs, *DAG.getContext());
+                      ByValArgLocs, *DAG.getContext());
 
   // Reserve stack space for the allocations in CCInfo.
   CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrByteSize);
@@ -5046,8 +5037,7 @@ PPCTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
                                   const SmallVectorImpl<ISD::OutputArg> &Outs,
                                   LLVMContext &Context) const {
   SmallVector<CCValAssign, 16> RVLocs;
-  CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
-                 RVLocs, Context);
+  CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context);
   return CCInfo.CheckReturn(Outs, RetCC_PPC);
 }
 
@@ -5059,8 +5049,8 @@ PPCTargetLowering::LowerReturn(SDValue Chain,
                                SDLoc dl, SelectionDAG &DAG) const {
 
   SmallVector<CCValAssign, 16> RVLocs;
-  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
-                 getTargetMachine(), RVLocs, *DAG.getContext());
+  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
+                 *DAG.getContext());
   CCInfo.AnalyzeReturn(Outs, RetCC_PPC);
 
   SDValue Flag;
@@ -6070,7 +6060,7 @@ SDValue PPCTargetLowering::LowerVECTOR_SHUFFLE(SDValue Op,
         PPC::isSplatShuffleMask(SVOp, 4) ||
         PPC::isVPKUWUMShuffleMask(SVOp, 1, DAG) ||
         PPC::isVPKUHUMShuffleMask(SVOp, 1, DAG) ||
-        PPC::isVSLDOIShuffleMask(SVOp, true, DAG) != -1 ||
+        PPC::isVSLDOIShuffleMask(SVOp, 1, DAG) != -1 ||
         PPC::isVMRGLShuffleMask(SVOp, 1, 1, DAG) ||
         PPC::isVMRGLShuffleMask(SVOp, 2, 1, DAG) ||
         PPC::isVMRGLShuffleMask(SVOp, 4, 1, DAG) ||
@@ -6087,7 +6077,7 @@ SDValue PPCTargetLowering::LowerVECTOR_SHUFFLE(SDValue Op,
   unsigned int ShuffleKind = isLittleEndian ? 2 : 0;
   if (PPC::isVPKUWUMShuffleMask(SVOp, ShuffleKind, DAG) ||
       PPC::isVPKUHUMShuffleMask(SVOp, ShuffleKind, DAG) ||
-      PPC::isVSLDOIShuffleMask(SVOp, false, DAG) != -1 ||
+      PPC::isVSLDOIShuffleMask(SVOp, ShuffleKind, DAG) != -1 ||
       PPC::isVMRGLShuffleMask(SVOp, 1, ShuffleKind, DAG) ||
       PPC::isVMRGLShuffleMask(SVOp, 2, ShuffleKind, DAG) ||
       PPC::isVMRGLShuffleMask(SVOp, 4, ShuffleKind, DAG) ||