Move InstrSelection into lib/Target/Sparc, as it's sparc specific

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10730 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 3 insertions, 1038 deletions

diff --git a/lib/CodeGen/InstrSelection/InstrForest.cpp b/lib/CodeGen/InstrSelection/InstrForest.cpp
deleted file mode 100644
index fd5056d2..0000000
--- a/lib/CodeGen/InstrSelection/InstrForest.cpp
+++ /dev/null
@@ -1,336 +0,0 @@
-//===-- InstrForest.cpp - Build instruction forest for inst selection -----===//
-// 
-//                     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.
-// 
-//===----------------------------------------------------------------------===//
-//
-//  The key goal is to group instructions into a single
-//  tree if one or more of them might be potentially combined into a single
-//  complex instruction in the target machine.
-//  Since this grouping is completely machine-independent, we do it as
-//  aggressive as possible to exploit any possible target instructions.
-//  In particular, we group two instructions O and I if:
-//      (1) Instruction O computes an operand used by instruction I,
-//  and (2) O and I are part of the same basic block,
-//  and (3) O has only a single use, viz., I.
-// 
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Constant.h"
-#include "llvm/Function.h"
-#include "llvm/iTerminators.h"
-#include "llvm/iMemory.h"
-#include "llvm/Type.h"
-#include "llvm/CodeGen/InstrForest.h"
-#include "llvm/CodeGen/MachineCodeForInstruction.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "Support/STLExtras.h"
-#include "Config/alloca.h"
-
-namespace llvm {
-
-//------------------------------------------------------------------------ 
-// class InstrTreeNode
-//------------------------------------------------------------------------ 
-
-void
-InstrTreeNode::dump(int dumpChildren, int indent) const {
-  dumpNode(indent);
-  
-  if (dumpChildren) {
-    if (LeftChild)
-      LeftChild->dump(dumpChildren, indent+1);
-    if (RightChild)
-      RightChild->dump(dumpChildren, indent+1);
-  }
-}
-
-
-InstructionNode::InstructionNode(Instruction* I)
-  : InstrTreeNode(NTInstructionNode, I), codeIsFoldedIntoParent(false)
-{
-  opLabel = I->getOpcode();
-
-  // Distinguish special cases of some instructions such as Ret and Br
-  // 
-  if (opLabel == Instruction::Ret && cast<ReturnInst>(I)->getReturnValue()) {
-    opLabel = RetValueOp;              	 // ret(value) operation
-  }
-  else if (opLabel ==Instruction::Br && !cast<BranchInst>(I)->isUnconditional())
-  {
-    opLabel = BrCondOp;		// br(cond) operation
-  } else if (opLabel >= Instruction::SetEQ && opLabel <= Instruction::SetGT) {
-    opLabel = SetCCOp;		// common label for all SetCC ops
-  } else if (opLabel == Instruction::Alloca && I->getNumOperands() > 0) {
-    opLabel = AllocaN;		 // Alloca(ptr, N) operation
-  } else if (opLabel == Instruction::GetElementPtr &&
-             cast<GetElementPtrInst>(I)->hasIndices()) {
-    opLabel = opLabel + 100;		 // getElem with index vector
-  } else if (opLabel == Instruction::Xor &&
-             BinaryOperator::isNot(I)) {
-    opLabel = (I->getType() == Type::BoolTy)?  NotOp  // boolean Not operator
-      : BNotOp; // bitwise Not operator
-  } else if (opLabel == Instruction::And || opLabel == Instruction::Or ||
-             opLabel == Instruction::Xor) {
-    // Distinguish bitwise operators from logical operators!
-    if (I->getType() != Type::BoolTy)
-      opLabel = opLabel + 100;	 // bitwise operator
-  } else if (opLabel == Instruction::Cast) {
-    const Type *ITy = I->getType();
-    switch(ITy->getPrimitiveID())
-    {
-    case Type::BoolTyID:    opLabel = ToBoolTy;    break;
-    case Type::UByteTyID:   opLabel = ToUByteTy;   break;
-    case Type::SByteTyID:   opLabel = ToSByteTy;   break;
-    case Type::UShortTyID:  opLabel = ToUShortTy;  break;
-    case Type::ShortTyID:   opLabel = ToShortTy;   break;
-    case Type::UIntTyID:    opLabel = ToUIntTy;    break;
-    case Type::IntTyID:     opLabel = ToIntTy;     break;
-    case Type::ULongTyID:   opLabel = ToULongTy;   break;
-    case Type::LongTyID:    opLabel = ToLongTy;    break;
-    case Type::FloatTyID:   opLabel = ToFloatTy;   break;
-    case Type::DoubleTyID:  opLabel = ToDoubleTy;  break;
-    case Type::ArrayTyID:   opLabel = ToArrayTy;   break;
-    case Type::PointerTyID: opLabel = ToPointerTy; break;
-    default:
-      // Just use `Cast' opcode otherwise. It's probably ignored.
-      break;
-    }
-  }
-}
-
-
-void
-InstructionNode::dumpNode(int indent) const {
-  for (int i=0; i < indent; i++)
-    std::cerr << "    ";
-  std::cerr << getInstruction()->getOpcodeName()
-            << " [label " << getOpLabel() << "]" << "\n";
-}
-
-void
-VRegListNode::dumpNode(int indent) const {
-  for (int i=0; i < indent; i++)
-    std::cerr << "    ";
-  
-  std::cerr << "List" << "\n";
-}
-
-
-void
-VRegNode::dumpNode(int indent) const {
-  for (int i=0; i < indent; i++)
-    std::cerr << "    ";
-  
-  std::cerr << "VReg " << getValue() << "\t(type "
-            << (int) getValue()->getValueType() << ")" << "\n";
-}
-
-void
-ConstantNode::dumpNode(int indent) const {
-  for (int i=0; i < indent; i++)
-    std::cerr << "    ";
-  
-  std::cerr << "Constant " << getValue() << "\t(type "
-            << (int) getValue()->getValueType() << ")" << "\n";
-}
-
-void LabelNode::dumpNode(int indent) const {
-  for (int i=0; i < indent; i++)
-    std::cerr << "    ";
-  
-  std::cerr << "Label " << getValue() << "\n";
-}
-
-//------------------------------------------------------------------------
-// class InstrForest
-// 
-// A forest of instruction trees, usually for a single method.
-//------------------------------------------------------------------------ 
-
-InstrForest::InstrForest(Function *F) {
-  for (Function::iterator BB = F->begin(), FE = F->end(); BB != FE; ++BB) {
-    for(BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I)
-      buildTreeForInstruction(I);
-  }
-}
-
-InstrForest::~InstrForest() {
-  for_each(treeRoots.begin(), treeRoots.end(), deleter<InstructionNode>);
-}
-
-void InstrForest::dump() const {
-  for (const_root_iterator I = roots_begin(); I != roots_end(); ++I)
-    (*I)->dump(/*dumpChildren*/ 1, /*indent*/ 0);
-}
-
-inline void InstrForest::eraseRoot(InstructionNode* node) {
-  for (RootSet::reverse_iterator RI=treeRoots.rbegin(), RE=treeRoots.rend();
-       RI != RE; ++RI)
-    if (*RI == node)
-      treeRoots.erase(RI.base()-1);
-}
-
-inline void InstrForest::noteTreeNodeForInstr(Instruction *instr,
-                                              InstructionNode *treeNode) {
-  (*this)[instr] = treeNode;
-  treeRoots.push_back(treeNode);	// mark node as root of a new tree
-}
-
-
-inline void InstrForest::setLeftChild(InstrTreeNode *parent,
-                                      InstrTreeNode *child) {
-  parent->LeftChild = child;
-  child->Parent = parent;
-  if (InstructionNode* instrNode = dyn_cast<InstructionNode>(child))
-    eraseRoot(instrNode); // no longer a tree root
-}
-
-inline void InstrForest::setRightChild(InstrTreeNode *parent,
-                                       InstrTreeNode *child) {
-  parent->RightChild = child;
-  child->Parent = parent;
-  if (InstructionNode* instrNode = dyn_cast<InstructionNode>(child))
-    eraseRoot(instrNode); // no longer a tree root
-}
-
-
-InstructionNode* InstrForest::buildTreeForInstruction(Instruction *instr) {
-  InstructionNode *treeNode = getTreeNodeForInstr(instr);
-  if (treeNode) {
-    // treeNode has already been constructed for this instruction
-    assert(treeNode->getInstruction() == instr);
-    return treeNode;
-  }
-  
-  // Otherwise, create a new tree node for this instruction.
-  // 
-  treeNode = new InstructionNode(instr);
-  noteTreeNodeForInstr(instr, treeNode);
-  
-  if (instr->getOpcode() == Instruction::Call) {
-    // Operands of call instruction
-    return treeNode;
-  }
-  
-  // If the instruction has more than 2 instruction operands,
-  // then we need to create artificial list nodes to hold them.
-  // (Note that we only count operands that get tree nodes, and not
-  // others such as branch labels for a branch or switch instruction.)
-  //
-  // To do this efficiently, we'll walk all operands, build treeNodes
-  // for all appropriate operands and save them in an array.  We then
-  // insert children at the end, creating list nodes where needed.
-  // As a performance optimization, allocate a child array only
-  // if a fixed array is too small.
-  // 
-  int numChildren = 0;
-  InstrTreeNode** childArray = new InstrTreeNode*[instr->getNumOperands()];
-  
-  //
-  // Walk the operands of the instruction
-  // 
-  for (Instruction::op_iterator O = instr->op_begin(); O!=instr->op_end(); ++O)
-    {
-      Value* operand = *O;
-      
-      // Check if the operand is a data value, not an branch label, type,
-      // method or module.  If the operand is an address type (i.e., label
-      // or method) that is used in an non-branching operation, e.g., `add'.
-      // that should be considered a data value.
-    
-      // Check latter condition here just to simplify the next IF.
-      bool includeAddressOperand =
-	(isa<BasicBlock>(operand) || isa<Function>(operand))
-	&& !instr->isTerminator();
-    
-      if (includeAddressOperand || isa<Instruction>(operand) ||
-	  isa<Constant>(operand) || isa<Argument>(operand) ||
-	  isa<GlobalVariable>(operand))
-      {
-        // This operand is a data value
-	
-        // An instruction that computes the incoming value is added as a
-        // child of the current instruction if:
-        //   the value has only a single use
-        //   AND both instructions are in the same basic block.
-        //   AND the current instruction is not a PHI (because the incoming
-        //		value is conceptually in a predecessor block,
-        //		even though it may be in the same static block)
-        // 
-        // (Note that if the value has only a single use (viz., `instr'),
-        //  the def of the value can be safely moved just before instr
-        //  and therefore it is safe to combine these two instructions.)
-        // 
-        // In all other cases, the virtual register holding the value
-        // is used directly, i.e., made a child of the instruction node.
-        // 
-        InstrTreeNode* opTreeNode;
-        if (isa<Instruction>(operand) && operand->hasOneUse() &&
-            cast<Instruction>(operand)->getParent() == instr->getParent() &&
-            instr->getOpcode() != Instruction::PHI &&
-            instr->getOpcode() != Instruction::Call)
-        {
-          // Recursively create a treeNode for it.
-          opTreeNode = buildTreeForInstruction((Instruction*)operand);
-        } else if (Constant *CPV = dyn_cast<Constant>(operand)) {
-          // Create a leaf node for a constant
-          opTreeNode = new ConstantNode(CPV);
-        } else {
-          // Create a leaf node for the virtual register
-          opTreeNode = new VRegNode(operand);
-        }
-
-        childArray[numChildren++] = opTreeNode;
-      }
-    }
-  
-  //-------------------------------------------------------------------- 
-  // Add any selected operands as children in the tree.
-  // Certain instructions can have more than 2 in some instances (viz.,
-  // a CALL or a memory access -- LOAD, STORE, and GetElemPtr -- to an
-  // array or struct). Make the operands of every such instruction into
-  // a right-leaning binary tree with the operand nodes at the leaves
-  // and VRegList nodes as internal nodes.
-  //-------------------------------------------------------------------- 
-  
-  InstrTreeNode *parent = treeNode;
-  
-  if (numChildren > 2) {
-    unsigned instrOpcode = treeNode->getInstruction()->getOpcode();
-    assert(instrOpcode == Instruction::PHI ||
-           instrOpcode == Instruction::Call ||
-           instrOpcode == Instruction::Load ||
-           instrOpcode == Instruction::Store ||
-           instrOpcode == Instruction::GetElementPtr);
-  }
-  
-  // Insert the first child as a direct child
-  if (numChildren >= 1)
-    setLeftChild(parent, childArray[0]);
-
-  int n;
-  
-  // Create a list node for children 2 .. N-1, if any
-  for (n = numChildren-1; n >= 2; n--) {
-    // We have more than two children
-    InstrTreeNode *listNode = new VRegListNode();
-    setRightChild(parent, listNode);
-    setLeftChild(listNode, childArray[numChildren - n]);
-    parent = listNode;
-  }
-  
-  // Now insert the last remaining child (if any).
-  if (numChildren >= 2) {
-    assert(n == 1);
-    setRightChild(parent, childArray[numChildren - 1]);
-  }
-
-  delete [] childArray;
-  return treeNode;
-}
-
-} // End llvm namespace
diff --git a/lib/CodeGen/InstrSelection/InstrSelection.cpp b/lib/CodeGen/InstrSelection/InstrSelection.cpp
deleted file mode 100644
index 5d9d0a3..0000000
--- a/lib/CodeGen/InstrSelection/InstrSelection.cpp
+++ /dev/null
@@ -1,417 +0,0 @@
-//===- InstrSelection.cpp - Machine Independent Inst Selection Driver -----===//
-// 
-//                     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.
-// 
-//===----------------------------------------------------------------------===//
-//
-// Machine-independent driver file for instruction selection.  This file
-// constructs a forest of BURG instruction trees and then uses the
-// BURG-generated tree grammar (BURM) to find the optimal instruction sequences
-// for a given machine.
-//	
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/InstrSelection.h"
-#include "llvm/Function.h"
-#include "llvm/IntrinsicLowering.h"
-#include "llvm/iPHINode.h"
-#include "llvm/iOther.h"
-#include "llvm/Pass.h"
-#include "llvm/CodeGen/InstrForest.h"
-#include "llvm/CodeGen/InstrSelectionSupport.h"
-#include "llvm/CodeGen/MachineCodeForInstruction.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegInfo.h"
-#include "Support/CommandLine.h"
-#include "Support/LeakDetector.h"
-
-namespace llvm {
-  std::vector<MachineInstr*>
-  FixConstantOperandsForInstr(Instruction *I, MachineInstr *MI,
-                              TargetMachine &TM);
-}
-
-namespace {
-  //===--------------------------------------------------------------------===//
-  // SelectDebugLevel - Allow command line control over debugging.
-  //
-  enum SelectDebugLevel_t {
-    Select_NoDebugInfo,
-    Select_PrintMachineCode, 
-    Select_DebugInstTrees, 
-    Select_DebugBurgTrees,
-  };
-  
-  // Enable Debug Options to be specified on the command line
-  cl::opt<SelectDebugLevel_t>
-  SelectDebugLevel("dselect", cl::Hidden,
-                   cl::desc("enable instruction selection debug information"),
-                   cl::values(
-     clEnumValN(Select_NoDebugInfo,      "n", "disable debug output"),
-     clEnumValN(Select_PrintMachineCode, "y", "print generated machine code"),
-     clEnumValN(Select_DebugInstTrees,   "i",
-                "print debugging info for instruction selection"),
-     clEnumValN(Select_DebugBurgTrees,   "b", "print burg trees"),
-                              0));
-
-
-  //===--------------------------------------------------------------------===//
-  //  InstructionSelection Pass
-  //
-  // This is the actual pass object that drives the instruction selection
-  // process.
-  //
-  class InstructionSelection : public FunctionPass {
-    TargetMachine &Target;
-    void InsertCodeForPhis(Function &F);
-    void InsertPhiElimInstructions(BasicBlock *BB,
-                                   const std::vector<MachineInstr*>& CpVec);
-    void SelectInstructionsForTree(InstrTreeNode* treeRoot, int goalnt);
-    void PostprocessMachineCodeForTree(InstructionNode* instrNode,
-                                       int ruleForNode, short* nts);
-  public:
-    InstructionSelection(TargetMachine &TM) : Target(TM) {}
-
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-      AU.setPreservesCFG();
-    }
-    
-    bool runOnFunction(Function &F);
-    virtual const char *getPassName() const { return "Instruction Selection"; }
-  };
-}
-
-
-TmpInstruction::TmpInstruction(MachineCodeForInstruction& mcfi,
-                               Value *s1, Value *s2, const std::string &name)
-  : Instruction(s1->getType(), Instruction::UserOp1, name)
-{
-  mcfi.addTemp(this);
-
-  Operands.push_back(Use(s1, this));  // s1 must be non-null
-  if (s2)
-    Operands.push_back(Use(s2, this));
-
-  // TmpInstructions should not be garbage checked.
-  LeakDetector::removeGarbageObject(this);
-}
-  
-// Constructor that requires the type of the temporary to be specified.
-// Both S1 and S2 may be NULL.(
-TmpInstruction::TmpInstruction(MachineCodeForInstruction& mcfi,
-                               const Type *Ty, Value *s1, Value* s2,
-                               const std::string &name)
-  : Instruction(Ty, Instruction::UserOp1, name)
-{
-  mcfi.addTemp(this);
-
-  if (s1) 
-    Operands.push_back(Use(s1, this));
-  if (s2)
-    Operands.push_back(Use(s2, this));
-
-  // TmpInstructions should not be garbage checked.
-  LeakDetector::removeGarbageObject(this);
-}
-
-bool InstructionSelection::runOnFunction(Function &F) {
-  // First pass - Walk the function, lowering any calls to intrinsic functions
-  // which the instruction selector cannot handle.
-  for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
-    for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
-      if (CallInst *CI = dyn_cast<CallInst>(I++))
-        if (Function *F = CI->getCalledFunction())
-          switch (F->getIntrinsicID()) {
-#undef va_start
-#undef va_copy
-#undef va_end
-          case Intrinsic::not_intrinsic:
-          case Intrinsic::va_start:
-          case Intrinsic::va_copy:
-          case Intrinsic::va_end:
-            // We directly implement these intrinsics.  Note that this knowledge
-            // is incestuously entangled with the code in
-            // SparcInstrSelection.cpp and must be updated when it is updated.
-            // Since ALL of the code in this library is incestuously intertwined
-            // with it already and sparc specific, we will live with this.
-            break;
-          default:
-            // All other intrinsic calls we must lower.
-            Instruction *Before = CI->getPrev();
-            Target.getIntrinsicLowering().LowerIntrinsicCall(CI);
-            if (Before) {        // Move iterator to instruction after call
-              I = Before;  ++I;
-            } else {
-              I = BB->begin();
-            }
-          }
-
-  //
-  // Build the instruction trees to be given as inputs to BURG.
-  // 
-  InstrForest instrForest(&F);
-  
-  if (SelectDebugLevel >= Select_DebugInstTrees) {
-    std::cerr << "\n\n*** Input to instruction selection for function "
-              << F.getName() << "\n\n" << F
-              << "\n\n*** Instruction trees for function "
-              << F.getName() << "\n\n";
-    instrForest.dump();
-  }
-  
-  //
-  // Invoke BURG instruction selection for each tree
-  // 
-  for (InstrForest::const_root_iterator RI = instrForest.roots_begin();
-       RI != instrForest.roots_end(); ++RI) {
-    InstructionNode* basicNode = *RI;
-    assert(basicNode->parent() == NULL && "A `root' node has a parent?"); 
-      
-    // Invoke BURM to label each tree node with a state
-    burm_label(basicNode);
-      
-    if (SelectDebugLevel >= Select_DebugBurgTrees) {
-      printcover(basicNode, 1, 0);
-      std::cerr << "\nCover cost == " << treecost(basicNode, 1, 0) <<"\n\n";
-      printMatches(basicNode);
-    }
-      
-    // Then recursively walk the tree to select instructions
-    SelectInstructionsForTree(basicNode, /*goalnt*/1);
-  }
-  
-  //
-  // Create the MachineBasicBlock records and add all of the MachineInstrs
-  // defined in the MachineCodeForInstruction objects to also live in the
-  // MachineBasicBlock objects.
-  // 
-  MachineFunction &MF = MachineFunction::get(&F);
-  for (Function::iterator BI = F.begin(), BE = F.end(); BI != BE; ++BI) {
-    MachineBasicBlock *MCBB = new MachineBasicBlock(BI);
-    MF.getBasicBlockList().push_back(MCBB);
-
-    for (BasicBlock::iterator II = BI->begin(); II != BI->end(); ++II) {
-      MachineCodeForInstruction &mvec = MachineCodeForInstruction::get(II);
-      MCBB->insert(MCBB->end(), mvec.begin(), mvec.end());
-    }
-  }
-
-  // Insert phi elimination code
-  InsertCodeForPhis(F);
-  
-  if (SelectDebugLevel >= Select_PrintMachineCode) {
-    std::cerr << "\n*** Machine instructions after INSTRUCTION SELECTION\n";
-    MachineFunction::get(&F).dump();
-  }
-  
-  return true;
-}
-
-
-//-------------------------------------------------------------------------
-// This method inserts phi elimination code for all BBs in a method
-//-------------------------------------------------------------------------
-
-void
-InstructionSelection::InsertCodeForPhis(Function &F) {
-  // for all basic blocks in function
-  //
-  MachineFunction &MF = MachineFunction::get(&F);
-  for (MachineFunction::iterator BB = MF.begin(); BB != MF.end(); ++BB) {
-    for (BasicBlock::const_iterator IIt = BB->getBasicBlock()->begin();
-         const PHINode *PN = dyn_cast<PHINode>(IIt); ++IIt) {
-      // FIXME: This is probably wrong...
-      Value *PhiCpRes = new PHINode(PN->getType(), "PhiCp:");
-
-      // The leak detector shouldn't track these nodes.  They are not garbage,
-      // even though their parent field is never filled in.
-      //
-      LeakDetector::removeGarbageObject(PhiCpRes);
-
-      // for each incoming value of the phi, insert phi elimination
-      //
-      for (unsigned i = 0; i < PN->getNumIncomingValues(); ++i) {
-        // insert the copy instruction to the predecessor BB
-        std::vector<MachineInstr*> mvec, CpVec;
-        Target.getRegInfo().cpValue2Value(PN->getIncomingValue(i), PhiCpRes,
-                                          mvec);
-        for (std::vector<MachineInstr*>::iterator MI=mvec.begin();
-             MI != mvec.end(); ++MI) {
-          std::vector<MachineInstr*> CpVec2 =
-            FixConstantOperandsForInstr(const_cast<PHINode*>(PN), *MI, Target);
-          CpVec2.push_back(*MI);
-          CpVec.insert(CpVec.end(), CpVec2.begin(), CpVec2.end());
-        }
-        
-        InsertPhiElimInstructions(PN->getIncomingBlock(i), CpVec);
-      }
-      
-      std::vector<MachineInstr*> mvec;
-      Target.getRegInfo().cpValue2Value(PhiCpRes, const_cast<PHINode*>(PN),
-                                        mvec);
-      BB->insert(BB->begin(), mvec.begin(), mvec.end());
-    }  // for each Phi Instr in BB
-  } // for all BBs in function
-}
-
-//-------------------------------------------------------------------------
-// Thid method inserts a copy instruction to a predecessor BB as a result
-// of phi elimination.
-//-------------------------------------------------------------------------
-
-void
-InstructionSelection::InsertPhiElimInstructions(BasicBlock *BB,
-                                        const std::vector<MachineInstr*>& CpVec)
-{ 
-  Instruction *TermInst = (Instruction*)BB->getTerminator();
-  MachineCodeForInstruction &MC4Term = MachineCodeForInstruction::get(TermInst);
-  MachineInstr *FirstMIOfTerm = MC4Term.front();
-  assert (FirstMIOfTerm && "No Machine Instrs for terminator");
-
-  MachineFunction &MF = MachineFunction::get(BB->getParent());
-
-  // FIXME: if PHI instructions existed in the machine code, this would be
-  // unnecessary.
-  MachineBasicBlock *MBB = 0;
-  for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
-    if (I->getBasicBlock() == BB) {
-      MBB = I;
-      break;
-    }
-
-  // find the position of first machine instruction generated by the
-  // terminator of this BB
-  MachineBasicBlock::iterator MCIt =
-    std::find(MBB->begin(), MBB->end(), FirstMIOfTerm);
-
-  assert(MCIt != MBB->end() && "Start inst of terminator not found");
-  
-  // insert the copy instructions just before the first machine instruction
-  // generated for the terminator
-  MBB->insert(MCIt, CpVec.begin(), CpVec.end());
-}
-
-
-//---------------------------------------------------------------------------
-// Function SelectInstructionsForTree 
-// 
-// Recursively walk the tree to select instructions.
-// Do this top-down so that child instructions can exploit decisions
-// made at the child instructions.
-// 
-// E.g., if br(setle(reg,const)) decides the constant is 0 and uses
-// a branch-on-integer-register instruction, then the setle node
-// can use that information to avoid generating the SUBcc instruction.
-//
-// Note that this cannot be done bottom-up because setle must do this
-// only if it is a child of the branch (otherwise, the result of setle
-// may be used by multiple instructions).
-//---------------------------------------------------------------------------
-
-void 
-InstructionSelection::SelectInstructionsForTree(InstrTreeNode* treeRoot,
-                                                int goalnt)
-{
-  // Get the rule that matches this node.
-  // 
-  int ruleForNode = burm_rule(treeRoot->state, goalnt);
-  
-  if (ruleForNode == 0) {
-    std::cerr << "Could not match instruction tree for instr selection\n";
-    abort();
-  }
-  
-  // Get this rule's non-terminals and the corresponding child nodes (if any)
-  // 
-  short *nts = burm_nts[ruleForNode];
-  
-  // First, select instructions for the current node and rule.
-  // (If this is a list node, not an instruction, then skip this step).
-  // This function is specific to the target architecture.
-  // 
-  if (treeRoot->opLabel != VRegListOp) {
-    std::vector<MachineInstr*> minstrVec;
-      
-    InstructionNode* instrNode = (InstructionNode*)treeRoot;
-    assert(instrNode->getNodeType() == InstrTreeNode::NTInstructionNode);
-      
-    GetInstructionsByRule(instrNode, ruleForNode, nts, Target, minstrVec);
-      
-    MachineCodeForInstruction &mvec = 
-      MachineCodeForInstruction::get(instrNode->getInstruction());
-    mvec.insert(mvec.end(), minstrVec.begin(), minstrVec.end());
-  }
-  
-  // Then, recursively compile the child nodes, if any.
-  // 
-  if (nts[0]) {
-    // i.e., there is at least one kid
-    InstrTreeNode* kids[2];
-    int currentRule = ruleForNode;
-    burm_kids(treeRoot, currentRule, kids);
-    
-    // First skip over any chain rules so that we don't visit
-    // the current node again.
-    // 
-    while (ThisIsAChainRule(currentRule)) {
-      currentRule = burm_rule(treeRoot->state, nts[0]);
-      nts = burm_nts[currentRule];
-      burm_kids(treeRoot, currentRule, kids);
-    }
-      
-    // Now we have the first non-chain rule so we have found
-    // the actual child nodes.  Recursively compile them.
-    // 
-    for (unsigned i = 0; nts[i]; i++) {
-      assert(i < 2);
-      InstrTreeNode::InstrTreeNodeType nodeType = kids[i]->getNodeType();
-      if (nodeType == InstrTreeNode::NTVRegListNode ||
-          nodeType == InstrTreeNode::NTInstructionNode)
-        SelectInstructionsForTree(kids[i], nts[i]);
-    }
-  }
-  
-  // Finally, do any post-processing on this node after its children
-  // have been translated
-  // 
-  if (treeRoot->opLabel != VRegListOp)
-    PostprocessMachineCodeForTree((InstructionNode*)treeRoot, ruleForNode, nts);
-}
-
-//---------------------------------------------------------------------------
-// Function PostprocessMachineCodeForTree
-// 
-// Apply any final cleanups to machine code for the root of a subtree
-// after selection for all its children has been completed.
-//
-void
-InstructionSelection::PostprocessMachineCodeForTree(InstructionNode* instrNode,
-                                                    int ruleForNode,
-                                                    short* nts) 
-{
-  // Fix up any constant operands in the machine instructions to either
-  // use an immediate field or to load the constant into a register
-  // Walk backwards and use direct indexes to allow insertion before current
-  // 
-  Instruction* vmInstr = instrNode->getInstruction();
-  MachineCodeForInstruction &mvec = MachineCodeForInstruction::get(vmInstr);
-  for (unsigned i = mvec.size(); i != 0; --i) {
-    std::vector<MachineInstr*> loadConstVec =
-      FixConstantOperandsForInstr(vmInstr, mvec[i-1], Target);
-      
-    mvec.insert(mvec.begin()+i-1, loadConstVec.begin(), loadConstVec.end());
-  }
-}
-
-
-//===----------------------------------------------------------------------===//
-// createInstructionSelectionPass - Public entrypoint for instruction selection
-// and this file as a whole...
-//
-FunctionPass *llvm::createInstructionSelectionPass(TargetMachine &TM) {
-  return new InstructionSelection(TM);
-}
diff --git a/lib/CodeGen/InstrSelection/InstrSelectionSupport.cpp b/lib/CodeGen/InstrSelection/InstrSelectionSupport.cpp
deleted file mode 100644
index a58aed9..0000000
--- a/lib/CodeGen/InstrSelection/InstrSelectionSupport.cpp
+++ /dev/null
@@ -1,268 +0,0 @@
-//===-- InstrSelectionSupport.cpp -----------------------------------------===//
-// 
-//                     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.
-// 
-//===----------------------------------------------------------------------===//
-//
-// Target-independent instruction selection code.  See SparcInstrSelection.cpp
-// for usage.
-// 
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/InstrSelectionSupport.h"
-#include "llvm/CodeGen/InstrSelection.h"
-#include "llvm/CodeGen/MachineInstrAnnot.h"
-#include "llvm/CodeGen/MachineCodeForInstruction.h"
-#include "llvm/CodeGen/InstrForest.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegInfo.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Constants.h"
-#include "llvm/BasicBlock.h"
-#include "llvm/DerivedTypes.h"
-#include "../../Target/Sparc/SparcInstrSelectionSupport.h"  // FIXME!
-
-namespace llvm {
-
-// Generate code to load the constant into a TmpInstruction (virtual reg) and
-// returns the virtual register.
-// 
-static TmpInstruction*
-InsertCodeToLoadConstant(Function *F,
-                         Value* opValue,
-                         Instruction* vmInstr,
-                         std::vector<MachineInstr*>& loadConstVec,
-                         TargetMachine& target)
-{
-  // Create a tmp virtual register to hold the constant.
-  MachineCodeForInstruction &mcfi = MachineCodeForInstruction::get(vmInstr);
-  TmpInstruction* tmpReg = new TmpInstruction(mcfi, opValue);
-  
-  target.getInstrInfo().CreateCodeToLoadConst(target, F, opValue, tmpReg,
-                                              loadConstVec, mcfi);
-  
-  // Record the mapping from the tmp VM instruction to machine instruction.
-  // Do this for all machine instructions that were not mapped to any
-  // other temp values created by 
-  // tmpReg->addMachineInstruction(loadConstVec.back());
-  
-  return tmpReg;
-}
-
-
-MachineOperand::MachineOperandType
-ChooseRegOrImmed(int64_t intValue,
-                 bool isSigned,
-		 MachineOpCode opCode,
-		 const TargetMachine& target,
-		 bool canUseImmed,
-		 unsigned int& getMachineRegNum,
-		 int64_t& getImmedValue)
-{
-  MachineOperand::MachineOperandType opType=MachineOperand::MO_VirtualRegister;
-  getMachineRegNum = 0;
-  getImmedValue = 0;
-
-  if (canUseImmed &&
-      target.getInstrInfo().constantFitsInImmedField(opCode, intValue)) {
-      opType = isSigned? MachineOperand::MO_SignExtendedImmed
-                       : MachineOperand::MO_UnextendedImmed;
-      getImmedValue = intValue;
-  } else if (intValue == 0 && target.getRegInfo().getZeroRegNum() >= 0) {
-    opType = MachineOperand::MO_MachineRegister;
-    getMachineRegNum = target.getRegInfo().getZeroRegNum();
-  }
-
-  return opType;
-}
-
-
-MachineOperand::MachineOperandType
-ChooseRegOrImmed(Value* val,
-		 MachineOpCode opCode,
-		 const TargetMachine& target,
-		 bool canUseImmed,
-		 unsigned int& getMachineRegNum,
-		 int64_t& getImmedValue)
-{
-  getMachineRegNum = 0;
-  getImmedValue = 0;
-
-  // To use reg or immed, constant needs to be integer, bool, or a NULL pointer
-  // TargetInstrInfo::ConvertConstantToIntType() does the right conversions:
-  bool isValidConstant;
-  uint64_t valueToUse =
-    target.getInstrInfo().ConvertConstantToIntType(target, val, val->getType(),
-                                                   isValidConstant);
-  if (! isValidConstant)
-    return MachineOperand::MO_VirtualRegister;
-
-  // Now check if the constant value fits in the IMMED field.
-  // 
-  return ChooseRegOrImmed((int64_t) valueToUse, val->getType()->isSigned(),
-                          opCode, target, canUseImmed,
-                          getMachineRegNum, getImmedValue);
-}
-
-//---------------------------------------------------------------------------
-// Function: FixConstantOperandsForInstr
-// 
-// Purpose:
-// Special handling for constant operands of a machine instruction
-// -- if the constant is 0, use the hardwired 0 register, if any;
-// -- if the constant fits in the IMMEDIATE field, use that field;
-// -- else create instructions to put the constant into a register, either
-//    directly or by loading explicitly from the constant pool.
-// 
-// In the first 2 cases, the operand of `minstr' is modified in place.
-// Returns a vector of machine instructions generated for operands that
-// fall under case 3; these must be inserted before `minstr'.
-//---------------------------------------------------------------------------
-
-std::vector<MachineInstr*>
-FixConstantOperandsForInstr(Instruction* vmInstr,
-                            MachineInstr* minstr,
-                            TargetMachine& target)
-{
-  std::vector<MachineInstr*> MVec;
-  
-  MachineOpCode opCode = minstr->getOpCode();
-  const TargetInstrInfo& instrInfo = target.getInstrInfo();
-  int resultPos = instrInfo.getResultPos(opCode);
-  int immedPos = instrInfo.getImmedConstantPos(opCode);
-
-  Function *F = vmInstr->getParent()->getParent();
-
-  for (unsigned op=0; op < minstr->getNumOperands(); op++)
-    {
-      const MachineOperand& mop = minstr->getOperand(op);
-          
-      // Skip the result position, preallocated machine registers, or operands
-      // that cannot be constants (CC regs or PC-relative displacements)
-      if (resultPos == (int)op ||
-          mop.getType() == MachineOperand::MO_MachineRegister ||
-          mop.getType() == MachineOperand::MO_CCRegister ||
-          mop.getType() == MachineOperand::MO_PCRelativeDisp)
-        continue;
-
-      bool constantThatMustBeLoaded = false;
-      unsigned int machineRegNum = 0;
-      int64_t immedValue = 0;
-      Value* opValue = NULL;
-      MachineOperand::MachineOperandType opType =
-        MachineOperand::MO_VirtualRegister;
-
-      // Operand may be a virtual register or a compile-time constant
-      if (mop.getType() == MachineOperand::MO_VirtualRegister) {
-        assert(mop.getVRegValue() != NULL);
-        opValue = mop.getVRegValue();
-        if (Constant *opConst = dyn_cast<Constant>(opValue)) {
-          opType = ChooseRegOrImmed(opConst, opCode, target,
-                                    (immedPos == (int)op), machineRegNum,
-                                    immedValue);
-          if (opType == MachineOperand::MO_VirtualRegister)
-            constantThatMustBeLoaded = true;
-        }
-      } else {
-        //
-        // If the operand is from the constant pool, don't try to change it.
-        //
-        if (mop.getType() == MachineOperand::MO_ConstantPoolIndex) {
-          continue;
-        }
-        assert(mop.isImmediate());
-        bool isSigned = mop.getType() == MachineOperand::MO_SignExtendedImmed;
-
-        // Bit-selection flags indicate an instruction that is extracting
-        // bits from its operand so ignore this even if it is a big constant.
-        if (mop.isHiBits32() || mop.isLoBits32() ||
-            mop.isHiBits64() || mop.isLoBits64())
-          continue;
-
-        opType = ChooseRegOrImmed(mop.getImmedValue(), isSigned,
-                                  opCode, target, (immedPos == (int)op), 
-                                  machineRegNum, immedValue);
-
-        if (opType == MachineOperand::MO_SignExtendedImmed ||
-            opType == MachineOperand::MO_UnextendedImmed) {
-          // The optype is an immediate value
-          // This means we need to change the opcode, e.g. ADDr -> ADDi
-          unsigned newOpcode = convertOpcodeFromRegToImm(opCode);
-          minstr->setOpcode(newOpcode);
-        }
-
-        if (opType == mop.getType()) 
-          continue;           // no change: this is the most common case
-
-        if (opType == MachineOperand::MO_VirtualRegister) {
-          constantThatMustBeLoaded = true;
-          opValue = isSigned
-            ? (Value*)ConstantSInt::get(Type::LongTy, immedValue)
-            : (Value*)ConstantUInt::get(Type::ULongTy,(uint64_t)immedValue);
-        }
-      }
-
-      if (opType == MachineOperand::MO_MachineRegister)
-        minstr->SetMachineOperandReg(op, machineRegNum);
-      else if (opType == MachineOperand::MO_SignExtendedImmed ||
-               opType == MachineOperand::MO_UnextendedImmed) {
-        minstr->SetMachineOperandConst(op, opType, immedValue);
-        // The optype is or has become an immediate
-        // This means we need to change the opcode, e.g. ADDr -> ADDi
-        unsigned newOpcode = convertOpcodeFromRegToImm(opCode);
-        minstr->setOpcode(newOpcode);
-      } else if (constantThatMustBeLoaded ||
-               (opValue && isa<GlobalValue>(opValue)))
-        { // opValue is a constant that must be explicitly loaded into a reg
-          assert(opValue);
-          TmpInstruction* tmpReg = InsertCodeToLoadConstant(F, opValue, vmInstr,
-                                                            MVec, target);
-          minstr->SetMachineOperandVal(op, MachineOperand::MO_VirtualRegister,
-                                       tmpReg);
-        }
-    }
-  
-  // Also, check for implicit operands used by the machine instruction
-  // (no need to check those defined since they cannot be constants).
-  // These include:
-  // -- arguments to a Call
-  // -- return value of a Return
-  // Any such operand that is a constant value needs to be fixed also.
-  // The current instructions with implicit refs (viz., Call and Return)
-  // have no immediate fields, so the constant always needs to be loaded
-  // into a register.
-  // 
-  bool isCall = instrInfo.isCall(opCode);
-  unsigned lastCallArgNum = 0;          // unused if not a call
-  CallArgsDescriptor* argDesc = NULL;   // unused if not a call
-  if (isCall)
-    argDesc = CallArgsDescriptor::get(minstr);
-  
-  for (unsigned i=0, N=minstr->getNumImplicitRefs(); i < N; ++i)
-    if (isa<Constant>(minstr->getImplicitRef(i)) ||
-        isa<GlobalValue>(minstr->getImplicitRef(i)))
-      {
-        Value* oldVal = minstr->getImplicitRef(i);
-        TmpInstruction* tmpReg =
-          InsertCodeToLoadConstant(F, oldVal, vmInstr, MVec, target);
-        minstr->setImplicitRef(i, tmpReg);
-        
-        if (isCall) {
-          // find and replace the argument in the CallArgsDescriptor
-          unsigned i=lastCallArgNum;
-          while (argDesc->getArgInfo(i).getArgVal() != oldVal)
-            ++i;
-          assert(i < argDesc->getNumArgs() &&
-                 "Constant operands to a call *must* be in the arg list");
-          lastCallArgNum = i;
-          argDesc->getArgInfo(i).replaceArgVal(tmpReg);
-        }
-      }
-  
-  return MVec;
-}
-
-} // End llvm namespace
diff --git a/lib/CodeGen/InstrSelection/Makefile b/lib/CodeGen/InstrSelection/Makefile
deleted file mode 100644
index b1dd1af..0000000
--- a/lib/CodeGen/InstrSelection/Makefile
+++ /dev/null
@@ -1,15 +0,0 @@
-##===- lib/CodeGen/InstrSelection/Makefile -----------------*- Makefile -*-===##
-# 
-#                     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.
-# 
-##===----------------------------------------------------------------------===##
-LEVEL = ../../..
-
-DIRS  = 
-
-LIBRARYNAME = select
-
-include $(LEVEL)/Makefile.common
diff --git a/lib/CodeGen/Makefile b/lib/CodeGen/Makefile
index e5c81e8..3f45da3 100644
--- a/lib/CodeGen/Makefile
+++ b/lib/CodeGen/Makefile
@@ -1,4 +1,4 @@
-##===- lib/CodeGen/Makefile ------------------------------*- Makefile -*-===##
+##===- lib/CodeGen/Makefile --------------------------------*- Makefile -*-===##
 # 
 #                     The LLVM Compiler Infrastructure
 #
@@ -6,8 +6,9 @@
 # the University of Illinois Open Source License. See LICENSE.TXT for details.
 # 
 ##===----------------------------------------------------------------------===##
+
 LEVEL = ../..
-PARALLEL_DIRS = InstrSelection InstrSched SelectionDAG
+PARALLEL_DIRS = InstrSched SelectionDAG
 LIBRARYNAME = codegen
 
 include $(LEVEL)/Makefile.common