Enabling the target-independent garbage collection infrastructure by hooking it
[oota-llvm.git] / lib / CodeGen / SelectionDAG / SelectionDAGISel.cpp
index 71999b44c1eb8d816cdb2b3b11a0cc030a5f7206..69c7b2c7b9593a28a67b1c7a6106dbc0eb25aad6 100644 (file)
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 #include "llvm/Intrinsics.h"
 #include "llvm/IntrinsicInst.h"
 #include "llvm/ParameterAttributes.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/Collector.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineJumpTableInfo.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/CodeGen/SchedulerRegistry.h"
 #include "llvm/CodeGen/SelectionDAG.h"
-#include "llvm/CodeGen/SSARegMap.h"
 #include "llvm/Target/MRegisterInfo.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetFrameInfo.h"
@@ -166,7 +167,7 @@ namespace llvm {
     TargetLowering &TLI;
     Function &Fn;
     MachineFunction &MF;
-    SSARegMap *RegMap;
+    MachineRegisterInfo &RegInfo;
 
     FunctionLoweringInfo(TargetLowering &TLI, Function &Fn,MachineFunction &MF);
 
@@ -189,7 +190,7 @@ namespace llvm {
 #endif
 
     unsigned MakeReg(MVT::ValueType VT) {
-      return RegMap->createVirtualRegister(TLI.getRegClassFor(VT));
+      return RegInfo.createVirtualRegister(TLI.getRegClassFor(VT));
     }
     
     /// isExportedInst - Return true if the specified value is an instruction
@@ -244,7 +245,7 @@ static bool isOnlyUsedInEntryBlock(Argument *A) {
 
 FunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli,
                                            Function &fn, MachineFunction &mf)
-    : TLI(tli), Fn(fn), MF(mf), RegMap(MF.getSSARegMap()) {
+    : TLI(tli), Fn(fn), MF(mf), RegInfo(MF.getRegInfo()) {
 
   // Create a vreg for each argument register that is not dead and is used
   // outside of the entry block for the function.
@@ -261,7 +262,7 @@ FunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli,
     if (AllocaInst *AI = dyn_cast<AllocaInst>(I))
       if (ConstantInt *CUI = dyn_cast<ConstantInt>(AI->getArraySize())) {
         const Type *Ty = AI->getAllocatedType();
-        uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
+        uint64_t TySize = TLI.getTargetData()->getABITypeSize(Ty);
         unsigned Align = 
           std::max((unsigned)TLI.getTargetData()->getPrefTypeAlignment(Ty),
                    AI->getAlignment());
@@ -426,12 +427,16 @@ public:
   /// FuncInfo - Information about the function as a whole.
   ///
   FunctionLoweringInfo &FuncInfo;
+  
+  /// GCI - Garbage collection metadata for the function.
+  CollectorMetadata *GCI;
 
   SelectionDAGLowering(SelectionDAG &dag, TargetLowering &tli,
                        AliasAnalysis &aa,
-                       FunctionLoweringInfo &funcinfo)
+                       FunctionLoweringInfo &funcinfo,
+                       CollectorMetadata *gci)
     : TLI(tli), DAG(dag), TD(DAG.getTarget().getTargetData()), AA(aa),
-      FuncInfo(funcinfo) {
+      FuncInfo(funcinfo), GCI(gci) {
   }
 
   /// getRoot - Return the current virtual root of the Selection DAG.
@@ -499,11 +504,9 @@ public:
                             unsigned Opc);
   bool isExportableFromCurrentBlock(Value *V, const BasicBlock *FromBB);
   void ExportFromCurrentBlock(Value *V);
-  void LowerCallTo(Instruction &I,
-                   const Type *CalledValueTy, unsigned CallingConv,
-                   bool IsTailCall, SDOperand Callee, unsigned OpIdx,
+  void LowerCallTo(CallSite CS, SDOperand Callee, bool IsTailCall,
                    MachineBasicBlock *LandingPad = NULL);
-  
+
   // Terminator instructions.
   void visitRet(ReturnInst &I);
   void visitBr(BranchInst &I);
@@ -597,7 +600,7 @@ public:
   void visitStore(StoreInst &I);
   void visitPHI(PHINode &I) { } // PHI nodes are handled specially.
   void visitCall(CallInst &I);
-  void visitInlineAsm(CallInst &I);
+  void visitInlineAsm(CallSite CS);
   const char *visitIntrinsicCall(CallInst &I, unsigned Intrinsic);
   void visitTargetIntrinsic(CallInst &I, unsigned Intrinsic);
 
@@ -934,12 +937,11 @@ void SelectionDAGLowering::visitRet(ReturnInst &I) {
         TmpVT = TLI.getTypeToTransformTo(MVT::i32);
       else
         TmpVT = MVT::i32;
-      const FunctionType *FTy = I.getParent()->getParent()->getFunctionType();
-      const ParamAttrsList *Attrs = FTy->getParamAttrs();
+      const Function *F = I.getParent()->getParent();
       ISD::NodeType ExtendKind = ISD::ANY_EXTEND;
-      if (Attrs && Attrs->paramHasAttr(0, ParamAttr::SExt))
+      if (F->paramHasAttr(0, ParamAttr::SExt))
         ExtendKind = ISD::SIGN_EXTEND;
-      if (Attrs && Attrs->paramHasAttr(0, ParamAttr::ZExt))
+      if (F->paramHasAttr(0, ParamAttr::ZExt))
         ExtendKind = ISD::ZERO_EXTEND;
       RetOp = DAG.getNode(ExtendKind, TmpVT, RetOp);
       NewValues.push_back(RetOp);
@@ -1167,7 +1169,6 @@ void SelectionDAGLowering::visitBr(BranchInst &I) {
 
     // Update machine-CFG edges.
     CurMBB->addSuccessor(Succ0MBB);
-
     return;
   }
 
@@ -1450,11 +1451,10 @@ void SelectionDAGLowering::visitInvoke(InvokeInst &I) {
   MachineBasicBlock *Return = FuncInfo.MBBMap[I.getSuccessor(0)];
   MachineBasicBlock *LandingPad = FuncInfo.MBBMap[I.getSuccessor(1)];
 
-  LowerCallTo(I, I.getCalledValue()->getType(),
-              I.getCallingConv(),
-              false,
-              getValue(I.getOperand(0)),
-              3, LandingPad);
+  if (isa<InlineAsm>(I.getCalledValue()))
+    visitInlineAsm(&I);
+  else
+    LowerCallTo(&I, getValue(I.getOperand(0)), false, LandingPad);
 
   // If the value of the invoke is used outside of its defining block, make it
   // available as a virtual register.
@@ -1915,7 +1915,7 @@ unsigned SelectionDAGLowering::Clusterify(CaseVector& Cases,
                          SI.getSuccessorValue(i),
                          SMBB));
   }
-  sort(Cases.begin(), Cases.end(), CaseCmp());
+  std::sort(Cases.begin(), Cases.end(), CaseCmp());
 
   // Merge case into clusters
   if (Cases.size()>=2)
@@ -2335,7 +2335,7 @@ void SelectionDAGLowering::visitAlloca(AllocaInst &I) {
     return;   // getValue will auto-populate this.
 
   const Type *Ty = I.getAllocatedType();
-  uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
+  uint64_t TySize = TLI.getTargetData()->getABITypeSize(Ty);
   unsigned Align =
     std::max((unsigned)TLI.getTargetData()->getPrefTypeAlignment(Ty),
              I.getAlignment());
@@ -2418,31 +2418,13 @@ void SelectionDAGLowering::visitStore(StoreInst &I) {
                            I.isVolatile(), I.getAlignment()));
 }
 
-/// IntrinsicCannotAccessMemory - Return true if the specified intrinsic cannot
-/// access memory and has no other side effects at all.
-static bool IntrinsicCannotAccessMemory(unsigned IntrinsicID) {
-#define GET_NO_MEMORY_INTRINSICS
-#include "llvm/Intrinsics.gen"
-#undef GET_NO_MEMORY_INTRINSICS
-  return false;
-}
-
-// IntrinsicOnlyReadsMemory - Return true if the specified intrinsic doesn't
-// have any side-effects or if it only reads memory.
-static bool IntrinsicOnlyReadsMemory(unsigned IntrinsicID) {
-#define GET_SIDE_EFFECT_INFO
-#include "llvm/Intrinsics.gen"
-#undef GET_SIDE_EFFECT_INFO
-  return false;
-}
-
 /// visitTargetIntrinsic - Lower a call of a target intrinsic to an INTRINSIC
 /// node.
 void SelectionDAGLowering::visitTargetIntrinsic(CallInst &I, 
                                                 unsigned Intrinsic) {
-  bool HasChain = !IntrinsicCannotAccessMemory(Intrinsic);
-  bool OnlyLoad = HasChain && IntrinsicOnlyReadsMemory(Intrinsic);
-  
+  bool HasChain = !I.doesNotAccessMemory();
+  bool OnlyLoad = HasChain && I.onlyReadsMemory();
+
   // Build the operand list.
   SmallVector<SDOperand, 8> Ops;
   if (HasChain) {  // If this intrinsic has side-effects, chainify it.
@@ -2930,65 +2912,85 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
     DAG.setRoot(Tmp.getValue(1));
     return 0;
   }
+
+  case Intrinsic::gcroot:
+    if (GCI) {
+      Value *Alloca = I.getOperand(1);
+      Constant *TypeMap = cast<Constant>(I.getOperand(2));
+      
+      FrameIndexSDNode *FI = cast<FrameIndexSDNode>(getValue(Alloca).Val);
+      GCI->addStackRoot(FI->getIndex(), TypeMap);
+    }
+    return 0;
+
+  case Intrinsic::gcread:
+  case Intrinsic::gcwrite:
+    assert(0 && "Collector failed to lower gcread/gcwrite intrinsics!");
+    return 0;
+
+  case Intrinsic::flt_rounds: {
+    setValue(&I, DAG.getNode(ISD::FLT_ROUNDS, MVT::i32));
+    return 0;
+  }
   }
 }
 
 
-void SelectionDAGLowering::LowerCallTo(Instruction &I,
-                                       const Type *CalledValueTy,
-                                       unsigned CallingConv,
+void SelectionDAGLowering::LowerCallTo(CallSite CS, SDOperand Callee,
                                        bool IsTailCall,
-                                       SDOperand Callee, unsigned OpIdx,
                                        MachineBasicBlock *LandingPad) {
-  const PointerType *PT = cast<PointerType>(CalledValueTy);
+  const PointerType *PT = cast<PointerType>(CS.getCalledValue()->getType());
   const FunctionType *FTy = cast<FunctionType>(PT->getElementType());
-  const ParamAttrsList *Attrs = FTy->getParamAttrs();
   MachineModuleInfo *MMI = DAG.getMachineModuleInfo();
   unsigned BeginLabel = 0, EndLabel = 0;
-    
+
   TargetLowering::ArgListTy Args;
   TargetLowering::ArgListEntry Entry;
-  Args.reserve(I.getNumOperands());
-  for (unsigned i = OpIdx, e = I.getNumOperands(); i != e; ++i) {
-    Value *Arg = I.getOperand(i);
-    SDOperand ArgNode = getValue(Arg);
-    Entry.Node = ArgNode; Entry.Ty = Arg->getType();
-
-    unsigned attrInd = i - OpIdx + 1;
-    Entry.isSExt  = Attrs && Attrs->paramHasAttr(attrInd, ParamAttr::SExt);
-    Entry.isZExt  = Attrs && Attrs->paramHasAttr(attrInd, ParamAttr::ZExt);
-    Entry.isInReg = Attrs && Attrs->paramHasAttr(attrInd, ParamAttr::InReg);
-    Entry.isSRet  = Attrs && Attrs->paramHasAttr(attrInd, ParamAttr::StructRet);
-    Entry.isNest  = Attrs && Attrs->paramHasAttr(attrInd, ParamAttr::Nest);
-    Entry.isByVal = Attrs && Attrs->paramHasAttr(attrInd, ParamAttr::ByVal);
+  Args.reserve(CS.arg_size());
+  for (CallSite::arg_iterator i = CS.arg_begin(), e = CS.arg_end();
+       i != e; ++i) {
+    SDOperand ArgNode = getValue(*i);
+    Entry.Node = ArgNode; Entry.Ty = (*i)->getType();
+
+    unsigned attrInd = i - CS.arg_begin() + 1;
+    Entry.isSExt  = CS.paramHasAttr(attrInd, ParamAttr::SExt);
+    Entry.isZExt  = CS.paramHasAttr(attrInd, ParamAttr::ZExt);
+    Entry.isInReg = CS.paramHasAttr(attrInd, ParamAttr::InReg);
+    Entry.isSRet  = CS.paramHasAttr(attrInd, ParamAttr::StructRet);
+    Entry.isNest  = CS.paramHasAttr(attrInd, ParamAttr::Nest);
+    Entry.isByVal = CS.paramHasAttr(attrInd, ParamAttr::ByVal);
     Args.push_back(Entry);
   }
 
-  if (ExceptionHandling && MMI && LandingPad) {
+  bool MarkTryRange = LandingPad ||
+    // C++ requires special handling of 'nounwind' calls.
+    (CS.doesNotThrow());
+
+  if (MarkTryRange && ExceptionHandling && MMI) {
     // Insert a label before the invoke call to mark the try range.  This can be
     // used to detect deletion of the invoke via the MachineModuleInfo.
     BeginLabel = MMI->NextLabelID();
     DAG.setRoot(DAG.getNode(ISD::LABEL, MVT::Other, getRoot(),
                             DAG.getConstant(BeginLabel, MVT::i32)));
   }
-  
+
   std::pair<SDOperand,SDOperand> Result =
-    TLI.LowerCallTo(getRoot(), I.getType(), 
-                    Attrs && Attrs->paramHasAttr(0, ParamAttr::SExt),
-                    FTy->isVarArg(), CallingConv, IsTailCall, 
+    TLI.LowerCallTo(getRoot(), CS.getType(),
+                    CS.paramHasAttr(0, ParamAttr::SExt),
+                    FTy->isVarArg(), CS.getCallingConv(), IsTailCall,
                     Callee, Args, DAG);
-  if (I.getType() != Type::VoidTy)
-    setValue(&I, Result.first);
+  if (CS.getType() != Type::VoidTy)
+    setValue(CS.getInstruction(), Result.first);
   DAG.setRoot(Result.second);
 
-  if (ExceptionHandling && MMI && LandingPad) {
+  if (MarkTryRange && ExceptionHandling && MMI) {
     // Insert a label at the end of the invoke call to mark the try range.  This
     // can be used to detect deletion of the invoke via the MachineModuleInfo.
     EndLabel = MMI->NextLabelID();
     DAG.setRoot(DAG.getNode(ISD::LABEL, MVT::Other, getRoot(),
                             DAG.getConstant(EndLabel, MVT::i32)));
 
-    // Inform MachineModuleInfo of range.    
+    // Inform MachineModuleInfo of range.
     MMI->addInvoke(LandingPad, BeginLabel, EndLabel);
   }
 }
@@ -3059,7 +3061,7 @@ void SelectionDAGLowering::visitCall(CallInst &I) {
       }
     }
   } else if (isa<InlineAsm>(I.getOperand(0))) {
-    visitInlineAsm(I);
+    visitInlineAsm(&I);
     return;
   }
 
@@ -3069,11 +3071,7 @@ void SelectionDAGLowering::visitCall(CallInst &I) {
   else
     Callee = DAG.getExternalSymbol(RenameFn, TLI.getPointerTy());
 
-  LowerCallTo(I, I.getCalledValue()->getType(),
-              I.getCallingConv(),
-              I.isTailCall(),
-              Callee,
-              1);
+  LowerCallTo(&I, Callee, I.isTailCall());
 }
 
 
@@ -3371,9 +3369,9 @@ GetRegistersForValue(AsmOperandInfo &OpInfo, bool HasEarlyClobber,
         ValueVT = RegVT;
 
       // Create the appropriate number of virtual registers.
-      SSARegMap *RegMap = MF.getSSARegMap();
+      MachineRegisterInfo &RegInfo = MF.getRegInfo();
       for (; NumRegs; --NumRegs)
-        Regs.push_back(RegMap->createVirtualRegister(PhysReg.second));
+        Regs.push_back(RegInfo.createVirtualRegister(PhysReg.second));
       
       OpInfo.AssignedRegs = RegsForValue(Regs, RegVT, ValueVT);
       OpInfo.MarkAllocatedRegs(isOutReg, isInReg, OutputRegs, InputRegs);
@@ -3440,8 +3438,8 @@ GetRegistersForValue(AsmOperandInfo &OpInfo, bool HasEarlyClobber,
 
 /// visitInlineAsm - Handle a call to an InlineAsm object.
 ///
-void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
-  InlineAsm *IA = cast<InlineAsm>(I.getOperand(0));
+void SelectionDAGLowering::visitInlineAsm(CallSite CS) {
+  InlineAsm *IA = cast<InlineAsm>(CS.getCalledValue());
 
   /// ConstraintOperands - Information about all of the constraints.
   std::vector<AsmOperandInfo> ConstraintOperands;
@@ -3461,7 +3459,7 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
   // registers, because it will not know to avoid the earlyclobbered output reg.
   bool SawEarlyClobber = false;
   
-  unsigned OpNo = 1;   // OpNo - The operand of the CallInst.
+  unsigned ArgNo = 0;   // ArgNo - The argument of the CallInst.
   for (unsigned i = 0, e = ConstraintInfos.size(); i != e; ++i) {
     ConstraintOperands.push_back(AsmOperandInfo(ConstraintInfos[i]));
     AsmOperandInfo &OpInfo = ConstraintOperands.back();
@@ -3474,14 +3472,14 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
       if (!OpInfo.isIndirect) {
         // The return value of the call is this value.  As such, there is no
         // corresponding argument.
-        assert(I.getType() != Type::VoidTy && "Bad inline asm!");
-        OpVT = TLI.getValueType(I.getType());
+        assert(CS.getType() != Type::VoidTy && "Bad inline asm!");
+        OpVT = TLI.getValueType(CS.getType());
       } else {
-        OpInfo.CallOperandVal = I.getOperand(OpNo++);
+        OpInfo.CallOperandVal = CS.getArgument(ArgNo++);
       }
       break;
     case InlineAsm::isInput:
-      OpInfo.CallOperandVal = I.getOperand(OpNo++);
+      OpInfo.CallOperandVal = CS.getArgument(ArgNo++);
       break;
     case InlineAsm::isClobber:
       // Nothing to do.
@@ -3489,31 +3487,37 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
     }
 
     // If this is an input or an indirect output, process the call argument.
+    // BasicBlocks are labels, currently appearing only in asm's.
     if (OpInfo.CallOperandVal) {
-      OpInfo.CallOperand = getValue(OpInfo.CallOperandVal);
-      const Type *OpTy = OpInfo.CallOperandVal->getType();
-      // If this is an indirect operand, the operand is a pointer to the
-      // accessed type.
-      if (OpInfo.isIndirect)
-        OpTy = cast<PointerType>(OpTy)->getElementType();
-      
-      // If OpTy is not a first-class value, it may be a struct/union that we
-      // can tile with integers.
-      if (!OpTy->isFirstClassType() && OpTy->isSized()) {
-        unsigned BitSize = TD->getTypeSizeInBits(OpTy);
-        switch (BitSize) {
-        default: break;
-        case 1:
-        case 8:
-        case 16:
-        case 32:
-        case 64:
-          OpTy = IntegerType::get(BitSize);
-          break;
+      if (isa<BasicBlock>(OpInfo.CallOperandVal))
+        OpInfo.CallOperand = 
+          DAG.getBasicBlock(FuncInfo.MBBMap[cast<BasicBlock>(OpInfo.CallOperandVal)]);
+      else {
+        OpInfo.CallOperand = getValue(OpInfo.CallOperandVal);
+        const Type *OpTy = OpInfo.CallOperandVal->getType();
+        // If this is an indirect operand, the operand is a pointer to the
+        // accessed type.
+        if (OpInfo.isIndirect)
+          OpTy = cast<PointerType>(OpTy)->getElementType();
+
+        // If OpTy is not a first-class value, it may be a struct/union that we
+        // can tile with integers.
+        if (!OpTy->isFirstClassType() && OpTy->isSized()) {
+          unsigned BitSize = TD->getTypeSizeInBits(OpTy);
+          switch (BitSize) {
+          default: break;
+          case 1:
+          case 8:
+          case 16:
+          case 32:
+          case 64:
+            OpTy = IntegerType::get(BitSize);
+            break;
+          }
         }
+
+        OpVT = TLI.getValueType(OpTy, true);
       }
-      
-      OpVT = TLI.getValueType(OpTy, true);
     }
     
     OpInfo.ConstraintVT = OpVT;
@@ -3546,7 +3550,7 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
         // Otherwise, create a stack slot and emit a store to it before the
         // asm.
         const Type *Ty = OpVal->getType();
-        uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
+        uint64_t TySize = TLI.getTargetData()->getABITypeSize(Ty);
         unsigned Align  = TLI.getTargetData()->getPrefTypeAlignment(Ty);
         MachineFunction &MF = DAG.getMachineFunction();
         int SSFI = MF.getFrameInfo()->CreateStackObject(TySize, Align);
@@ -3626,7 +3630,7 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
         // This is the result value of the call.
         assert(RetValRegs.Regs.empty() &&
                "Cannot have multiple output constraints yet!");
-        assert(I.getType() != Type::VoidTy && "Bad inline asm!");
+        assert(CS.getType() != Type::VoidTy && "Bad inline asm!");
         RetValRegs = OpInfo.AssignedRegs;
       } else {
         IndirectStoresToEmit.push_back(std::make_pair(OpInfo.AssignedRegs,
@@ -3760,13 +3764,13 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
     // width/num elts.  Make sure to convert it to the right type with
     // bit_convert.
     if (MVT::isVector(Val.getValueType())) {
-      const VectorType *VTy = cast<VectorType>(I.getType());
+      const VectorType *VTy = cast<VectorType>(CS.getType());
       MVT::ValueType DesiredVT = TLI.getValueType(VTy);
       
       Val = DAG.getNode(ISD::BIT_CONVERT, DesiredVT, Val);
     }
     
-    setValue(&I, Val);
+    setValue(CS.getInstruction(), Val);
   }
   
   std::vector<std::pair<SDOperand, Value*> > StoresToEmit;
@@ -3804,7 +3808,7 @@ void SelectionDAGLowering::visitMalloc(MallocInst &I) {
     Src = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, Src);
 
   // Scale the source by the type size.
-  uint64_t ElementSize = TD->getTypeSize(I.getType()->getElementType());
+  uint64_t ElementSize = TD->getABITypeSize(I.getType()->getElementType());
   Src = DAG.getNode(ISD::MUL, Src.getValueType(),
                     Src, getIntPtrConstant(ElementSize));
 
@@ -3883,8 +3887,6 @@ void SelectionDAGLowering::visitVACopy(CallInst &I) {
 /// integrated into SDISel.
 std::vector<SDOperand> 
 TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
-  const FunctionType *FTy = F.getFunctionType();
-  const ParamAttrsList *Attrs = FTy->getParamAttrs();
   // Add CC# and isVararg as operands to the FORMAL_ARGUMENTS node.
   std::vector<SDOperand> Ops;
   Ops.push_back(DAG.getRoot());
@@ -3903,25 +3905,25 @@ TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
 
     // FIXME: Distinguish between a formal with no [sz]ext attribute from one
     // that is zero extended!
-    if (Attrs && Attrs->paramHasAttr(j, ParamAttr::ZExt))
+    if (F.paramHasAttr(j, ParamAttr::ZExt))
       Flags &= ~(ISD::ParamFlags::SExt);
-    if (Attrs && Attrs->paramHasAttr(j, ParamAttr::SExt))
+    if (F.paramHasAttr(j, ParamAttr::SExt))
       Flags |= ISD::ParamFlags::SExt;
-    if (Attrs && Attrs->paramHasAttr(j, ParamAttr::InReg))
+    if (F.paramHasAttr(j, ParamAttr::InReg))
       Flags |= ISD::ParamFlags::InReg;
-    if (Attrs && Attrs->paramHasAttr(j, ParamAttr::StructRet))
+    if (F.paramHasAttr(j, ParamAttr::StructRet))
       Flags |= ISD::ParamFlags::StructReturn;
-    if (Attrs && Attrs->paramHasAttr(j, ParamAttr::ByVal)) {
+    if (F.paramHasAttr(j, ParamAttr::ByVal)) {
       Flags |= ISD::ParamFlags::ByVal;
       const PointerType *Ty = cast<PointerType>(I->getType());
       const StructType *STy = cast<StructType>(Ty->getElementType());
       unsigned StructAlign =
           Log2_32(getTargetData()->getCallFrameTypeAlignment(STy));
-      unsigned StructSize  = getTargetData()->getTypeSize(STy);
+      unsigned StructSize  = getTargetData()->getABITypeSize(STy);
       Flags |= (StructAlign << ISD::ParamFlags::ByValAlignOffs);
       Flags |= (StructSize  << ISD::ParamFlags::ByValSizeOffs);
     }
-    if (Attrs && Attrs->paramHasAttr(j, ParamAttr::Nest))
+    if (F.paramHasAttr(j, ParamAttr::Nest))
       Flags |= ISD::ParamFlags::Nest;
     Flags |= (OriginalAlignment << ISD::ParamFlags::OrigAlignmentOffs);
     
@@ -3978,10 +3980,10 @@ TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
     case Promote: {
       SDOperand Op(Result, i++);
       if (MVT::isInteger(VT)) {
-        if (Attrs && Attrs->paramHasAttr(Idx, ParamAttr::SExt))
+        if (F.paramHasAttr(Idx, ParamAttr::SExt))
           Op = DAG.getNode(ISD::AssertSext, Op.getValueType(), Op,
                            DAG.getValueType(VT));
-        else if (Attrs && Attrs->paramHasAttr(Idx, ParamAttr::ZExt))
+        else if (F.paramHasAttr(Idx, ParamAttr::ZExt))
           Op = DAG.getNode(ISD::AssertZext, Op.getValueType(), Op,
                            DAG.getValueType(VT));
         Op = DAG.getNode(ISD::TRUNCATE, VT, Op);
@@ -4047,7 +4049,7 @@ TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
       const StructType *STy = cast<StructType>(Ty->getElementType());
       unsigned StructAlign =
           Log2_32(getTargetData()->getCallFrameTypeAlignment(STy));
-      unsigned StructSize  = getTargetData()->getTypeSize(STy);
+      unsigned StructSize  = getTargetData()->getABITypeSize(STy);
       Flags |= (StructAlign << ISD::ParamFlags::ByValAlignOffs);
       Flags |= (StructSize  << ISD::ParamFlags::ByValSizeOffs);
     }
@@ -4134,14 +4136,6 @@ SDOperand TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
   return SDOperand();
 }
 
-std::pair<SDOperand,SDOperand>
-TargetLowering::ExpandOperationResult(SDNode *N, SelectionDAG &DAG) {
-  assert(0 && "ExpandOperation not implemented for this target!");
-  abort();
-  return std::pair<SDOperand,SDOperand>();
-}
-
-
 SDOperand TargetLowering::CustomPromoteOperation(SDOperand Op,
                                                  SelectionDAG &DAG) {
   assert(0 && "CustomPromoteOperation not implemented for this target!");
@@ -4329,19 +4323,6 @@ void SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) {
           }
         }
 
-        // Check to see if there is an unaligned memcpy from/onto the stack. If
-        // so, then ignore it for the present.
-        if (Op1.getOpcode() == ISD::FrameIndex ||
-            Op2.getOpcode() == ISD::FrameIndex) {
-          unsigned TotalSize = 0;
-
-          for (unsigned i = 0; i < NumMemOps; i++)
-            TotalSize += MVT::getSizeInBits(MemOps[i]) / 8;
-
-          if (TotalSize % Align != 0)
-            break;
-        }
-
         for (unsigned i = 0; i < NumMemOps; i++) {
           MVT::ValueType VT = MemOps[i];
           unsigned VTSize = MVT::getSizeInBits(VT) / 8;
@@ -4356,13 +4337,13 @@ void SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) {
                            I.getOperand(1), DstOff);
           } else {
             Value = DAG.getLoad(VT, getRoot(),
-                        getMemBasePlusOffset(Op2, SrcOff, DAG, TLI),
-                        I.getOperand(2), SrcOff);
+                                getMemBasePlusOffset(Op2, SrcOff, DAG, TLI),
+                                I.getOperand(2), SrcOff, false, Align);
             Chain = Value.getValue(1);
             Store =
               DAG.getStore(Chain, Value,
                            getMemBasePlusOffset(Op1, DstOff, DAG, TLI),
-                           I.getOperand(1), DstOff);
+                           I.getOperand(1), DstOff, false, Align);
           }
           OutChains.push_back(Store);
           SrcOff += VTSize;
@@ -4403,11 +4384,12 @@ void SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) {
 //===----------------------------------------------------------------------===//
 
 unsigned SelectionDAGISel::MakeReg(MVT::ValueType VT) {
-  return RegMap->createVirtualRegister(TLI.getRegClassFor(VT));
+  return RegInfo->createVirtualRegister(TLI.getRegClassFor(VT));
 }
 
 void SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<AliasAnalysis>();
+  AU.addRequired<CollectorModuleMetadata>();
   AU.setPreservesAll();
 }
 
@@ -4418,7 +4400,11 @@ bool SelectionDAGISel::runOnFunction(Function &Fn) {
   AA = &getAnalysis<AliasAnalysis>();
 
   MachineFunction &MF = MachineFunction::construct(&Fn, TLI.getTargetMachine());
-  RegMap = MF.getSSARegMap();
+  if (MF.getFunction()->hasCollector())
+    GCI = &getAnalysis<CollectorModuleMetadata>().get(*MF.getFunction());
+  else
+    GCI = 0;
+  RegInfo = &MF.getRegInfo();
   DOUT << "\n\n\n=== " << Fn.getName() << "\n";
 
   FunctionLoweringInfo FuncInfo(TLI, Fn, MF);
@@ -4435,9 +4421,9 @@ bool SelectionDAGISel::runOnFunction(Function &Fn) {
   // Add function live-ins to entry block live-in set.
   BasicBlock *EntryBB = &Fn.getEntryBlock();
   BB = FuncInfo.MBBMap[EntryBB];
-  if (!MF.livein_empty())
-    for (MachineFunction::livein_iterator I = MF.livein_begin(),
-           E = MF.livein_end(); I != E; ++I)
+  if (!RegInfo->livein_empty())
+    for (MachineRegisterInfo::livein_iterator I = RegInfo->livein_begin(),
+           E = RegInfo->livein_end(); I != E; ++I)
       BB->addLiveIn(I->first);
 
 #ifndef NDEBUG
@@ -4499,14 +4485,13 @@ LowerArguments(BasicBlock *LLVMBB, SelectionDAGLowering &SDL,
 
 static void copyCatchInfo(BasicBlock *SrcBB, BasicBlock *DestBB,
                           MachineModuleInfo *MMI, FunctionLoweringInfo &FLI) {
-  assert(!FLI.MBBMap[SrcBB]->isLandingPad() &&
-         "Copying catch info out of a landing pad!");
   for (BasicBlock::iterator I = SrcBB->begin(), E = --SrcBB->end(); I != E; ++I)
     if (isSelector(I)) {
       // Apply the catch info to DestBB.
       addCatchInfo(cast<CallInst>(*I), MMI, FLI.MBBMap[DestBB]);
 #ifndef NDEBUG
-      FLI.CatchInfoFound.insert(I);
+      if (!FLI.MBBMap[SrcBB]->isLandingPad())
+        FLI.CatchInfoFound.insert(I);
 #endif
     }
 }
@@ -4556,7 +4541,7 @@ static void CheckDAGForTailCallsAndFixThem(SelectionDAG &DAG,
 void SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB,
        std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate,
                                          FunctionLoweringInfo &FuncInfo) {
-  SelectionDAGLowering SDL(DAG, TLI, *AA, FuncInfo);
+  SelectionDAGLowering SDL(DAG, TLI, *AA, FuncInfo, GCI);
 
   std::vector<SDOperand> UnorderedChains;
 
@@ -4803,8 +4788,9 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
       MachineInstr *PHI = PHINodesToUpdate[i].first;
       assert(PHI->getOpcode() == TargetInstrInfo::PHI &&
              "This is not a machine PHI node that we are updating!");
-      PHI->addRegOperand(PHINodesToUpdate[i].second, false);
-      PHI->addMachineBasicBlockOperand(BB);
+      PHI->addOperand(MachineOperand::CreateReg(PHINodesToUpdate[i].second,
+                                                false));
+      PHI->addOperand(MachineOperand::CreateMBB(BB));
     }
     return;
   }
@@ -4814,7 +4800,7 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
     if (!BitTestCases[i].Emitted) {
       SelectionDAG HSDAG(TLI, MF, getAnalysisToUpdate<MachineModuleInfo>());
       CurDAG = &HSDAG;
-      SelectionDAGLowering HSDL(HSDAG, TLI, *AA, FuncInfo);
+      SelectionDAGLowering HSDL(HSDAG, TLI, *AA, FuncInfo, GCI);
       // Set the current basic block to the mbb we wish to insert the code into
       BB = BitTestCases[i].Parent;
       HSDL.setCurrentBasicBlock(BB);
@@ -4827,7 +4813,7 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
     for (unsigned j = 0, ej = BitTestCases[i].Cases.size(); j != ej; ++j) {
       SelectionDAG BSDAG(TLI, MF, getAnalysisToUpdate<MachineModuleInfo>());
       CurDAG = &BSDAG;
-      SelectionDAGLowering BSDL(BSDAG, TLI, *AA, FuncInfo);
+      SelectionDAGLowering BSDL(BSDAG, TLI, *AA, FuncInfo, GCI);
       // Set the current basic block to the mbb we wish to insert the code into
       BB = BitTestCases[i].Cases[j].ThisBB;
       BSDL.setCurrentBasicBlock(BB);
@@ -4855,18 +4841,22 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
       // This is "default" BB. We have two jumps to it. From "header" BB and
       // from last "case" BB.
       if (PHIBB == BitTestCases[i].Default) {
-        PHI->addRegOperand(PHINodesToUpdate[pi].second, false);
-        PHI->addMachineBasicBlockOperand(BitTestCases[i].Parent);
-        PHI->addRegOperand(PHINodesToUpdate[pi].second, false);
-        PHI->addMachineBasicBlockOperand(BitTestCases[i].Cases.back().ThisBB);
+        PHI->addOperand(MachineOperand::CreateReg(PHINodesToUpdate[pi].second,
+                                                  false));
+        PHI->addOperand(MachineOperand::CreateMBB(BitTestCases[i].Parent));
+        PHI->addOperand(MachineOperand::CreateReg(PHINodesToUpdate[pi].second,
+                                                  false));
+        PHI->addOperand(MachineOperand::CreateMBB(BitTestCases[i].Cases.
+                                                  back().ThisBB));
       }
       // One of "cases" BB.
       for (unsigned j = 0, ej = BitTestCases[i].Cases.size(); j != ej; ++j) {
         MachineBasicBlock* cBB = BitTestCases[i].Cases[j].ThisBB;
         if (cBB->succ_end() !=
             std::find(cBB->succ_begin(),cBB->succ_end(), PHIBB)) {
-          PHI->addRegOperand(PHINodesToUpdate[pi].second, false);
-          PHI->addMachineBasicBlockOperand(cBB);
+          PHI->addOperand(MachineOperand::CreateReg(PHINodesToUpdate[pi].second,
+                                                    false));
+          PHI->addOperand(MachineOperand::CreateMBB(cBB));
         }
       }
     }
@@ -4880,7 +4870,7 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
     if (!JTCases[i].first.Emitted) {
       SelectionDAG HSDAG(TLI, MF, getAnalysisToUpdate<MachineModuleInfo>());
       CurDAG = &HSDAG;
-      SelectionDAGLowering HSDL(HSDAG, TLI, *AA, FuncInfo);
+      SelectionDAGLowering HSDL(HSDAG, TLI, *AA, FuncInfo, GCI);
       // Set the current basic block to the mbb we wish to insert the code into
       BB = JTCases[i].first.HeaderBB;
       HSDL.setCurrentBasicBlock(BB);
@@ -4892,7 +4882,7 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
     
     SelectionDAG JSDAG(TLI, MF, getAnalysisToUpdate<MachineModuleInfo>());
     CurDAG = &JSDAG;
-    SelectionDAGLowering JSDL(JSDAG, TLI, *AA, FuncInfo);
+    SelectionDAGLowering JSDL(JSDAG, TLI, *AA, FuncInfo, GCI);
     // Set the current basic block to the mbb we wish to insert the code into
     BB = JTCases[i].second.MBB;
     JSDL.setCurrentBasicBlock(BB);
@@ -4909,13 +4899,15 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
              "This is not a machine PHI node that we are updating!");
       // "default" BB. We can go there only from header BB.
       if (PHIBB == JTCases[i].second.Default) {
-        PHI->addRegOperand(PHINodesToUpdate[pi].second, false);
-        PHI->addMachineBasicBlockOperand(JTCases[i].first.HeaderBB);
+        PHI->addOperand(MachineOperand::CreateReg(PHINodesToUpdate[pi].second,
+                                                  false));
+        PHI->addOperand(MachineOperand::CreateMBB(JTCases[i].first.HeaderBB));
       }
       // JT BB. Just iterate over successors here
       if (BB->succ_end() != std::find(BB->succ_begin(),BB->succ_end(), PHIBB)) {
-        PHI->addRegOperand(PHINodesToUpdate[pi].second, false);
-        PHI->addMachineBasicBlockOperand(BB);
+        PHI->addOperand(MachineOperand::CreateReg(PHINodesToUpdate[pi].second,
+                                                  false));
+        PHI->addOperand(MachineOperand::CreateMBB(BB));
       }
     }
   }
@@ -4927,8 +4919,9 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
     assert(PHI->getOpcode() == TargetInstrInfo::PHI &&
            "This is not a machine PHI node that we are updating!");
     if (BB->isSuccessor(PHI->getParent())) {
-      PHI->addRegOperand(PHINodesToUpdate[i].second, false);
-      PHI->addMachineBasicBlockOperand(BB);
+      PHI->addOperand(MachineOperand::CreateReg(PHINodesToUpdate[i].second,
+                                                false));
+      PHI->addOperand(MachineOperand::CreateMBB(BB));
     }
   }
   
@@ -4937,7 +4930,7 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
   for (unsigned i = 0, e = SwitchCases.size(); i != e; ++i) {
     SelectionDAG SDAG(TLI, MF, getAnalysisToUpdate<MachineModuleInfo>());
     CurDAG = &SDAG;
-    SelectionDAGLowering SDL(SDAG, TLI, *AA, FuncInfo);
+    SelectionDAGLowering SDL(SDAG, TLI, *AA, FuncInfo, GCI);
     
     // Set the current basic block to the mbb we wish to insert the code into
     BB = SwitchCases[i].ThisBB;
@@ -4959,8 +4952,9 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF,
         for (unsigned pn = 0; ; ++pn) {
           assert(pn != PHINodesToUpdate.size() && "Didn't find PHI entry!");
           if (PHINodesToUpdate[pn].first == Phi) {
-            Phi->addRegOperand(PHINodesToUpdate[pn].second, false);
-            Phi->addMachineBasicBlockOperand(SwitchCases[i].ThisBB);
+            Phi->addOperand(MachineOperand::CreateReg(PHINodesToUpdate[pn].
+                                                      second, false));
+            Phi->addOperand(MachineOperand::CreateMBB(SwitchCases[i].ThisBB));
             break;
           }
         }