Add "inreg" field to CallSDNode (doesn't increase

its size).  Adjust various lowering functions to
pass this info through from CallInst.  Use it to
implement sseregparm returns on X86.  Remove
X86_ssecall calling convention.

llvm-svn: 56677

5 files changed, 24 insertions, 17 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/CallingConvLower.cpp b/llvm/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
index a6f52dd0244..c0077793d0e 100644
--- a/llvm/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
@@ -126,7 +126,10 @@ void CCState::AnalyzeCallOperands(SmallVectorImpl<MVT> &ArgVTs,
 void CCState::AnalyzeCallResult(CallSDNode *TheCall, CCAssignFn Fn) {
   for (unsigned i = 0, e = TheCall->getNumRetVals(); i != e; ++i) {
     MVT VT = TheCall->getRetValType(i);
-    if (Fn(i, VT, VT, CCValAssign::Full, ISD::ArgFlagsTy(), *this)) {
+    ISD::ArgFlagsTy Flags = ISD::ArgFlagsTy();
+    if (TheCall->isInreg())
+      Flags.setInReg();
+    if (Fn(i, VT, VT, CCValAssign::Full, Flags, *this)) {
       cerr << "Call result #" << i << " has unhandled type "
            << VT.getMVTString() << "\n";
       abort();
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 75dd644cb84..e8f32dbf9c3 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -3979,7 +3979,7 @@ SDValue SelectionDAGLegalize::LegalizeOp(SDValue Op) {
       TargetLowering::ArgListTy Args;
       std::pair<SDValue,SDValue> CallResult =
         TLI.LowerCallTo(Tmp1, Type::VoidTy,
-                        false, false, false, CallingConv::C, false,
+                        false, false, false, false, CallingConv::C, false,
                         DAG.getExternalSymbol("abort", TLI.getPointerTy()),
                         Args, DAG);
       Result = CallResult.second;
@@ -5302,8 +5302,8 @@ SDValue SelectionDAGLegalize::ExpandLibCall(RTLIB::Libcall LC, SDNode *Node,
   // Splice the libcall in wherever FindInputOutputChains tells us to.
   const Type *RetTy = Node->getValueType(0).getTypeForMVT();
   std::pair<SDValue,SDValue> CallInfo =
-    TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, CallingConv::C,
-                    false, Callee, Args, DAG);
+    TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, false,
+                    CallingConv::C, false, Callee, Args, DAG);
 
   // Legalize the call sequence, starting with the chain.  This will advance
   // the LastCALLSEQ_END to the legalized version of the CALLSEQ_END node that
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
index 640392f26cf..55acc822114 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
@@ -629,7 +629,7 @@ SDValue DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
   const Type *RetTy = RetVT.getTypeForMVT();
   std::pair<SDValue,SDValue> CallInfo =
     TLI.LowerCallTo(DAG.getEntryNode(), RetTy, isSigned, !isSigned, false,
-                    CallingConv::C, false, Callee, Args, DAG);
+                    false, CallingConv::C, false, Callee, Args, DAG);
   return CallInfo.first;
 }
 
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index dc108f66a6a..4c4a90a2ed4 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -3114,7 +3114,7 @@ SDValue SelectionDAG::getMemcpy(SDValue Chain, SDValue Dst,
   Entry.Node = Size; Args.push_back(Entry);
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
-                    false, false, false, CallingConv::C, false,
+                    false, false, false, false, CallingConv::C, false,
                     getExternalSymbol("memcpy", TLI.getPointerTy()),
                     Args, *this);
   return CallResult.second;
@@ -3159,7 +3159,7 @@ SDValue SelectionDAG::getMemmove(SDValue Chain, SDValue Dst,
   Entry.Node = Size; Args.push_back(Entry);
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
-                    false, false, false, CallingConv::C, false,
+                    false, false, false, false, CallingConv::C, false,
                     getExternalSymbol("memmove", TLI.getPointerTy()),
                     Args, *this);
   return CallResult.second;
@@ -3210,7 +3210,7 @@ SDValue SelectionDAG::getMemset(SDValue Chain, SDValue Dst,
   Args.push_back(Entry);
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
-                    false, false, false, CallingConv::C, false,
+                    false, false, false, false, CallingConv::C, false,
                     getExternalSymbol("memset", TLI.getPointerTy()),
                     Args, *this);
   return CallResult.second;
@@ -3329,7 +3329,7 @@ SDValue SelectionDAG::getMergeValues(const SDValue *Ops, unsigned NumOps,
 
 SDValue
 SelectionDAG::getCall(unsigned CallingConv, bool IsVarArgs, bool IsTailCall,
-                      SDVTList VTs,
+                      bool IsInreg, SDVTList VTs,
                       const SDValue *Operands, unsigned NumOperands) {
   // Do not include isTailCall in the folding set profile.
   FoldingSetNodeID ID;
@@ -3345,7 +3345,7 @@ SelectionDAG::getCall(unsigned CallingConv, bool IsVarArgs, bool IsTailCall,
     return SDValue(E, 0);
   }
   SDNode *N = NodeAllocator.Allocate<CallSDNode>();
-  new (N) CallSDNode(CallingConv, IsVarArgs, IsTailCall,
+  new (N) CallSDNode(CallingConv, IsVarArgs, IsTailCall, IsInreg,
                      VTs, Operands, NumOperands);
   CSEMap.InsertNode(N, IP);
   AllNodes.push_back(N);
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index dc9d654d572..76902505bc6 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -4123,8 +4123,9 @@ void SelectionDAGLowering::LowerCallTo(CallSite CS, SDValue Callee,
   std::pair<SDValue,SDValue> Result =
     TLI.LowerCallTo(getRoot(), CS.getType(),
                     CS.paramHasAttr(0, Attribute::SExt),
-                    CS.paramHasAttr(0, Attribute::ZExt),
-                    FTy->isVarArg(), CS.getCallingConv(),
+                    CS.paramHasAttr(0, Attribute::ZExt), FTy->isVarArg(),
+                    CS.paramHasAttr(0, Attribute::InReg),
+                    CS.getCallingConv(),
                     IsTailCall && PerformTailCallOpt,
                     Callee, Args, DAG);
   if (CS.getType() != Type::VoidTy)
@@ -5050,8 +5051,9 @@ void SelectionDAGLowering::visitMalloc(MallocInst &I) {
   Args.push_back(Entry);
 
   std::pair<SDValue,SDValue> Result =
-    TLI.LowerCallTo(getRoot(), I.getType(), false, false, false, CallingConv::C,
-                    PerformTailCallOpt, DAG.getExternalSymbol("malloc", IntPtr),
+    TLI.LowerCallTo(getRoot(), I.getType(), false, false, false, false,
+                    CallingConv::C, PerformTailCallOpt, 
+                    DAG.getExternalSymbol("malloc", IntPtr),
                     Args, DAG);
   setValue(&I, Result.first);  // Pointers always fit in registers
   DAG.setRoot(Result.second);
@@ -5065,7 +5067,7 @@ void SelectionDAGLowering::visitFree(FreeInst &I) {
   Args.push_back(Entry);
   MVT IntPtr = TLI.getPointerTy();
   std::pair<SDValue,SDValue> Result =
-    TLI.LowerCallTo(getRoot(), Type::VoidTy, false, false, false,
+    TLI.LowerCallTo(getRoot(), Type::VoidTy, false, false, false, false,
                     CallingConv::C, PerformTailCallOpt,
                     DAG.getExternalSymbol("free", IntPtr), Args, DAG);
   DAG.setRoot(Result.second);
@@ -5234,6 +5236,7 @@ void TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG,
 std::pair<SDValue, SDValue>
 TargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
                             bool RetSExt, bool RetZExt, bool isVarArg,
+                            bool isInreg,
                             unsigned CallingConv, bool isTailCall,
                             SDValue Callee,
                             ArgListTy &Args, SelectionDAG &DAG) {
@@ -5326,10 +5329,11 @@ TargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
   LoweredRetTys.push_back(MVT::Other);  // Always has a chain.
   
   // Create the CALL node.
-  SDValue Res = DAG.getCall(CallingConv, isVarArg, isTailCall,
+  SDValue Res = DAG.getCall(CallingConv, isVarArg, isTailCall, isInreg,
                             DAG.getVTList(&LoweredRetTys[0],
                                           LoweredRetTys.size()),
-                            &Ops[0], Ops.size());
+                            &Ops[0], Ops.size()
+                            );
   Chain = Res.getValue(LoweredRetTys.size() - 1);
 
   // Gather up the call result into a single value.