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

1 files changed, 0 insertions, 417 deletions

diff --git a/lib/CodeGen/InstrSelection/InstrSelection.cpp b/lib/CodeGen/InstrSelection/InstrSelection.cpp
deleted file mode 100644
index 5d9d0a355b..0000000000
--- 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);
-}