There are no longer any places that require a

MERGE_VALUES node with only one operand, so get
rid of special code that only existed to handle
that possibility.

llvm-svn: 60349

10 files changed, 47 insertions, 39 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 5b230fb655a..b7ad6d8e87c 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -4235,7 +4235,8 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
       MVT ValueVTs[] = { LHS.getValueType(), OType };
       SDValue Ops[] = { Sum, Cmp };
 
-      Result = DAG.getMergeValues(DAG.getVTList(&ValueVTs[0], 2), &Ops[0], 2);
+      Result = DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(&ValueVTs[0], 2),
+                           &Ops[0], 2);
       SDNode *RNode = Result.getNode();
       DAG.ReplaceAllUsesOfValueWith(SDValue(Node, 0), SDValue(RNode, 0));
       DAG.ReplaceAllUsesOfValueWith(SDValue(Node, 1), SDValue(RNode, 1));
@@ -4264,7 +4265,8 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
       MVT ValueVTs[] = { LHS.getValueType(), OType };
       SDValue Ops[] = { Sum, Cmp };
 
-      Result = DAG.getMergeValues(DAG.getVTList(&ValueVTs[0], 2), &Ops[0], 2);
+      Result = DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(&ValueVTs[0], 2),
+                           &Ops[0], 2);
       SDNode *RNode = Result.getNode();
       DAG.ReplaceAllUsesOfValueWith(SDValue(Node, 0), SDValue(RNode, 0));
       DAG.ReplaceAllUsesOfValueWith(SDValue(Node, 1), SDValue(RNode, 1));
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 41aa044b1ac..324d325b2e0 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2187,8 +2187,9 @@ SDValue SelectionDAG::getNode(unsigned Opcode, MVT VT, SDValue Operand) {
   unsigned OpOpcode = Operand.getNode()->getOpcode();
   switch (Opcode) {
   case ISD::TokenFactor:
+  case ISD::MERGE_VALUES:
   case ISD::CONCAT_VECTORS:
-    return Operand;         // Factor or concat of one node?  No need.
+    return Operand;         // Factor, merge or concat of one node?  No need.
   case ISD::FP_ROUND: assert(0 && "Invalid method to make FP_ROUND node");
   case ISD::FP_EXTEND:
     assert(VT.isFloatingPoint() &&
@@ -3355,9 +3356,8 @@ SDValue SelectionDAG::getAtomic(unsigned Opcode, SDValue Chain,
 
 /// getMergeValues - Create a MERGE_VALUES node from the given operands.
 /// Allowed to return something different (and simpler) if Simplify is true.
-SDValue SelectionDAG::getMergeValues(const SDValue *Ops, unsigned NumOps,
-                                     bool Simplify) {
-  if (Simplify && NumOps == 1)
+SDValue SelectionDAG::getMergeValues(const SDValue *Ops, unsigned NumOps) {
+  if (NumOps == 1)
     return Ops[0];
 
   SmallVector<MVT, 4> VTs;
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 41d4425cc5b..e8987c54af5 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -2158,8 +2158,9 @@ void SelectionDAGLowering::visitSelect(User &I) {
                               SDValue(TrueVal.getNode(), TrueVal.getResNo() + i),
                               SDValue(FalseVal.getNode(), FalseVal.getResNo() + i));
 
-    setValue(&I, DAG.getMergeValues(DAG.getVTList(&ValueVTs[0], NumValues),
-                                    &Values[0], NumValues));
+    setValue(&I, DAG.getNode(ISD::MERGE_VALUES,
+                             DAG.getVTList(&ValueVTs[0], NumValues),
+                             &Values[0], NumValues));
   }
 }
 
@@ -2528,8 +2529,9 @@ void SelectionDAGLowering::visitInsertValue(InsertValueInst &I) {
     Values[i] = IntoUndef ? DAG.getNode(ISD::UNDEF, AggValueVTs[i]) :
                 SDValue(Agg.getNode(), Agg.getResNo() + i);
 
-  setValue(&I, DAG.getMergeValues(DAG.getVTList(&AggValueVTs[0], NumAggValues),
-                                  &Values[0], NumAggValues));
+  setValue(&I, DAG.getNode(ISD::MERGE_VALUES,
+                           DAG.getVTList(&AggValueVTs[0], NumAggValues),
+                           &Values[0], NumAggValues));
 }
 
 void SelectionDAGLowering::visitExtractValue(ExtractValueInst &I) {
@@ -2556,8 +2558,9 @@ void SelectionDAGLowering::visitExtractValue(ExtractValueInst &I) {
                     Agg.getNode()->getValueType(Agg.getResNo() + i)) :
         SDValue(Agg.getNode(), Agg.getResNo() + i);
 
-  setValue(&I, DAG.getMergeValues(DAG.getVTList(&ValValueVTs[0], NumValValues),
-                                  &Values[0], NumValValues));
+  setValue(&I, DAG.getNode(ISD::MERGE_VALUES,
+                           DAG.getVTList(&ValValueVTs[0], NumValValues),
+                           &Values[0], NumValValues));
 }
 
 
@@ -2721,8 +2724,9 @@ void SelectionDAGLowering::visitLoad(LoadInst &I) {
       PendingLoads.push_back(Chain);
   }
 
-  setValue(&I, DAG.getMergeValues(DAG.getVTList(&ValueVTs[0], NumValues),
-                                  &Values[0], NumValues));
+  setValue(&I, DAG.getNode(ISD::MERGE_VALUES,
+                           DAG.getVTList(&ValueVTs[0], NumValues),
+                           &Values[0], NumValues));
 }
 
 
@@ -4544,8 +4548,9 @@ SDValue RegsForValue::getCopyFromRegs(SelectionDAG &DAG,
     Parts.clear();
   }
 
-  return DAG.getMergeValues(DAG.getVTList(&ValueVTs[0], ValueVTs.size()),
-                            &Values[0], ValueVTs.size());
+  return DAG.getNode(ISD::MERGE_VALUES,
+                     DAG.getVTList(&ValueVTs[0], ValueVTs.size()),
+                     &Values[0], ValueVTs.size());
 }
 
 /// getCopyToRegs - Emit a series of CopyToReg nodes that copies the
@@ -5680,8 +5685,9 @@ TargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
                          AssertOp);
       ReturnValues.push_back(ReturnValue);
     }
-    Res = DAG.getMergeValues(DAG.getVTList(&RetTys[0], RetTys.size()),
-                             &ReturnValues[0], ReturnValues.size());
+    Res = DAG.getNode(ISD::MERGE_VALUES,
+                      DAG.getVTList(&RetTys[0], RetTys.size()),
+                      &ReturnValues[0], ReturnValues.size());
   }
 
   return std::make_pair(Res, Chain);
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 1f6294f03c3..69452c13601 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -1021,8 +1021,8 @@ ARMTargetLowering::LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG) {
   ArgValues.push_back(Root);
 
   // Return the new list of results.
-  return DAG.getMergeValues(Op.getNode()->getVTList(), &ArgValues[0],
-                            ArgValues.size());
+  return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
+                     &ArgValues[0], ArgValues.size());
 }
 
 /// isFloatingPointZero - Return true if this is +0.0.
diff --git a/llvm/lib/Target/Alpha/AlphaISelLowering.cpp b/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
index 66d66d0d8aa..7b0fcca9a37 100644
--- a/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/llvm/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -294,8 +294,8 @@ static SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG,
   ArgValues.push_back(Root);
 
   // Return the new list of results.
-  return DAG.getMergeValues(Op.getNode()->getVTList(), &ArgValues[0],
-                            ArgValues.size());
+  return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
+                     &ArgValues[0], ArgValues.size());
 }
 
 static SDValue LowerRET(SDValue Op, SelectionDAG &DAG) {
diff --git a/llvm/lib/Target/CellSPU/SPUISelLowering.cpp b/llvm/lib/Target/CellSPU/SPUISelLowering.cpp
index bca8a4104f8..184f0b23fa5 100644
--- a/llvm/lib/Target/CellSPU/SPUISelLowering.cpp
+++ b/llvm/lib/Target/CellSPU/SPUISelLowering.cpp
@@ -1047,8 +1047,8 @@ LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG, int &VarArgsFrameIndex)
   ArgValues.push_back(Root);
 
   // Return the new list of results.
-  return DAG.getMergeValues(Op.getNode()->getVTList(), &ArgValues[0],
-                            ArgValues.size());
+  return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
+                     &ArgValues[0], ArgValues.size());
 }
 
 /// isLSAAddress - Return the immediate to use if the specified
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
index 60f96ae4dd3..bc0294f4a02 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -778,8 +778,8 @@ LowerCallResult(SDValue Chain, SDValue InFlag, CallSDNode *TheCall,
   ResultVals.push_back(Chain);
 
   // Merge everything together with a MERGE_VALUES node.
-  return DAG.getMergeValues(TheCall->getVTList(), &ResultVals[0],
-                            ResultVals.size()).getNode();
+  return DAG.getNode(ISD::MERGE_VALUES, TheCall->getVTList(),
+                     &ResultVals[0], ResultVals.size()).getNode();
 }
 
 //===----------------------------------------------------------------------===//
@@ -921,8 +921,8 @@ LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG)
   ArgValues.push_back(Root);
 
   // Return the new list of results.
-  return DAG.getMergeValues(Op.getNode()->getVTList(), &ArgValues[0],
-                            ArgValues.size()).getValue(Op.getResNo());
+  return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
+                     &ArgValues[0], ArgValues.size()).getValue(Op.getResNo());
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index d72fdf6ee50..58fd67505f7 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -1261,7 +1261,7 @@ SDValue PPCTargetLowering::LowerTRAMPOLINE(SDValue Op, SelectionDAG &DAG) {
   SDValue Ops[] =
     { CallResult.first, CallResult.second };
 
-  return DAG.getMergeValues(Ops, 2, false);
+  return DAG.getMergeValues(Ops, 2);
 }
 
 SDValue PPCTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG,
@@ -1825,8 +1825,8 @@ PPCTargetLowering::LowerFORMAL_ARGUMENTS(SDValue Op,
   ArgValues.push_back(Root);
  
   // Return the new list of results.
-  return DAG.getMergeValues(Op.getNode()->getVTList(), &ArgValues[0],
-                            ArgValues.size());
+  return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
+                     &ArgValues[0], ArgValues.size());
 }
 
 /// CalculateParameterAndLinkageAreaSize - Get the size of the paramter plus
@@ -2605,8 +2605,8 @@ SDValue PPCTargetLowering::LowerCALL(SDValue Op, SelectionDAG &DAG,
   
   // Otherwise, merge everything together with a MERGE_VALUES node.
   ResultVals.push_back(Chain);
-  SDValue Res = DAG.getMergeValues(TheCall->getVTList(), &ResultVals[0],
-                                     ResultVals.size());
+  SDValue Res = DAG.getNode(ISD::MERGE_VALUES, TheCall->getVTList(),
+                            &ResultVals[0], ResultVals.size());
   return Res.getValue(Op.getResNo());
 }
 
diff --git a/llvm/lib/Target/Sparc/SparcISelLowering.cpp b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
index 59e19d54666..7b7bf096847 100644
--- a/llvm/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
@@ -449,8 +449,8 @@ static SDValue LowerCALL(SDValue Op, SelectionDAG &DAG) {
   ResultVals.push_back(Chain);
 
   // Merge everything together with a MERGE_VALUES node.
-  return DAG.getMergeValues(TheCall->getVTList(), &ResultVals[0],
-                            ResultVals.size());
+  return DAG.getNode(ISD::MERGE_VALUES, TheCall->getVTList(), &ResultVals[0],
+                     ResultVals.size());
 }
 
 
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 0540538a9d3..109609b4369 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1048,8 +1048,8 @@ LowerCallResult(SDValue Chain, SDValue InFlag, CallSDNode *TheCall,
 
   // Merge everything together with a MERGE_VALUES node.
   ResultVals.push_back(Chain);
-  return DAG.getMergeValues(TheCall->getVTList(), &ResultVals[0],
-                            ResultVals.size()).getNode();
+  return DAG.getNode(ISD::MERGE_VALUES, TheCall->getVTList(), &ResultVals[0],
+                     ResultVals.size()).getNode();
 }
 
 
@@ -1431,8 +1431,8 @@ X86TargetLowering::LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG) {
   FuncInfo->setBytesToPopOnReturn(BytesToPopOnReturn);
 
   // Return the new list of results.
-  return DAG.getMergeValues(Op.getNode()->getVTList(), &ArgValues[0],
-                            ArgValues.size()).getValue(Op.getResNo());
+  return DAG.getNode(ISD::MERGE_VALUES, Op.getNode()->getVTList(),
+                     &ArgValues[0], ArgValues.size()).getValue(Op.getResNo());
 }
 
 SDValue