Files moved to CodeGen/PreOpts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3839 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 0 insertions, 294 deletions

diff --git a/lib/CodeGen/PreSelection/Makefile b/lib/CodeGen/PreSelection/Makefile
deleted file mode 100644
index 59f3359..0000000
--- a/lib/CodeGen/PreSelection/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-LEVEL = ../../..
-
-DIRS  = 
-
-LIBRARYNAME = preselect
-
-include $(LEVEL)/Makefile.common
-
diff --git a/lib/CodeGen/PreSelection/PreSelection.cpp b/lib/CodeGen/PreSelection/PreSelection.cpp
deleted file mode 100644
index 2e55594..0000000
--- a/lib/CodeGen/PreSelection/PreSelection.cpp
+++ /dev/null
@@ -1,286 +0,0 @@
-//===- PreSelection.cpp - Specialize LLVM code for target machine ---------===//
-//
-// This file defines the PreSelection pass which specializes LLVM code for a
-// target machine, while remaining in legal portable LLVM form and
-// preserving type information and type safety.  This is meant to enable
-// dataflow optimizations on target-specific operations such as accesses to
-// constants, globals, and array indexing.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/PreSelection.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/MachineInstrInfo.h"
-#include "llvm/Transforms/Scalar.h"
-#include "llvm/Support/InstVisitor.h"
-#include "llvm/Module.h"
-#include "llvm/Constants.h"
-#include "llvm/iMemory.h"
-#include "llvm/iPHINode.h"
-#include "llvm/iOther.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Pass.h"
-#include "llvm/Annotation.h"
-#include "Support/CommandLine.h"
-#include "Support/NonCopyable.h"
-using std::map;
-using std::cerr;
-
-namespace {
-  //===--------------------------------------------------------------------===//
-  // SelectDebugLevel - Allow command line control over debugging.
-  //
-  enum PreSelectDebugLevel_t {
-    PreSelect_NoDebugInfo,
-    PreSelect_PrintOutput, 
-  };
-
-  // Enable Debug Options to be specified on the command line
-  cl::opt<PreSelectDebugLevel_t>
-  PreSelectDebugLevel("dpreselect", cl::Hidden,
-     cl::desc("debug information for target-dependent pre-selection"),
-     cl::values(
-       clEnumValN(PreSelect_NoDebugInfo, "n", "disable debug output (default)"),
-       clEnumValN(PreSelect_PrintOutput, "y", "print generated machine code"),
-       /* default level = */ PreSelect_NoDebugInfo));
-
-
-  //===--------------------------------------------------------------------===//
-  // class ConstantPoolForModule:
-  // 
-  // The pool of constants that must be emitted for a module.
-  // This is a single pool for the entire module and is shared by
-  // all invocations of the PreSelection pass for this module by putting
-  // this as as annotation on the Module object.
-  // A single GlobalVariable is created for each constant in the pool
-  // representing the memory for that constant.  
-  // 
-  static AnnotationID CPFM_AID(
-                 AnnotationManager::getID("CodeGen::ConstantPoolForModule"));
-
-  class ConstantPoolForModule: private Annotation, public NonCopyable {
-    Module* myModule;
-    std::map<const Constant*, GlobalVariable*> gvars;
-    std::map<const Constant*, GlobalVariable*> origGVars;
-    ConstantPoolForModule(Module* M);   // called only by annotation builder
-    ConstantPoolForModule();            // do not implement
-  public:
-    static ConstantPoolForModule& get(Module* M) {
-      ConstantPoolForModule* cpool =
-        (ConstantPoolForModule*) M->getAnnotation(CPFM_AID);
-      if (cpool == NULL) // create a new annotation and add it to the Module
-        M->addAnnotation(cpool = new ConstantPoolForModule(M));
-      return *cpool;
-    }
-
-    GlobalVariable* getGlobalForConstant(Constant* CV) {
-      std::map<const Constant*, GlobalVariable*>::iterator I = gvars.find(CV);
-      if (I != gvars.end())
-        return I->second;               // global exists so return it
-      return addToConstantPool(CV);     // create a new global and return it
-    }
-
-    GlobalVariable*  addToConstantPool(Constant* CV) {
-      GlobalVariable*& GV = gvars[CV];  // handle to global var entry in map
-      if (GV == NULL)
-        { // check if a global constant already existed; otherwise create one
-          std::map<const Constant*, GlobalVariable*>::iterator PI =
-            origGVars.find(CV);
-          if (PI != origGVars.end())
-            GV = PI->second;            // put in map
-          else
-            {
-              GV = new GlobalVariable(CV->getType(), true,true,CV); //put in map
-              myModule->getGlobalList().push_back(GV); // GV owned by module now
-            }
-        }
-      return GV;
-    }
-  };
-
-  /* ctor */
-  ConstantPoolForModule::ConstantPoolForModule(Module* M)
-    : Annotation(CPFM_AID), myModule(M)
-  {
-    // Build reverse map for pre-existing global constants so we can find them
-    for (Module::giterator GI = M->gbegin(), GE = M->gend(); GI != GE; ++GI)
-      if (GI->hasInitializer() && GI->isConstant())
-        origGVars[GI->getInitializer()] = GI;
-  }
-
-  //===--------------------------------------------------------------------===//
-  // PreSelection Pass - Specialize LLVM code for the current target machine.
-  // This was and will be a basicblock pass, but make it a FunctionPass until
-  // BasicBlockPass ::doFinalization(Function&) is available.
-  // 
-  class PreSelection : public BasicBlockPass, public InstVisitor<PreSelection>
-  {
-    const TargetMachine &target;
-    Function* function;
-
-    GetElementPtrInst* getGlobalAddr(Value* ptr, Instruction* insertBefore = 0);
-
-    GlobalVariable* getGlobalForConstant(Constant* CV) {
-      Module* M = function->getParent();
-      return ConstantPoolForModule::get(M).getGlobalForConstant(CV);
-    }
-
-  public:
-    PreSelection (const TargetMachine &T): target(T), function(NULL) {}
-
-    // runOnBasicBlock - apply this pass to each BB
-    bool runOnBasicBlock(BasicBlock &BB) {
-      function = BB.getParent();
-      this->visit(BB);
-      return true;
-    }
-
-    bool doFinalization(Function &F) {
-      if (PreSelectDebugLevel >= PreSelect_PrintOutput)
-        cerr << "\n\n*** LLVM code after pre-selection for function "
-             << F.getName() << ":\n\n" << F;
-      return false;
-    }
-
-    // These methods do the actual work of specializing code
-    void visitInstruction(Instruction &I);   // common work for every instr. 
-    void visitGetElementPtrInst(GetElementPtrInst &I);
-    void visitLoadInst(LoadInst &I);
-    void visitStoreInst(StoreInst &I);
-
-    // Helper functions for visiting operands of every instruction
-    void visitOperands(Instruction &I);    // work on all operands of instr.
-    void visitOneOperand(Instruction &I, Constant* CV, unsigned opNum,
-                         Instruction& insertBefore); // iworks on one operand
-  };
-}  // end anonymous namespace
-
-
-// Register the pass...
-static RegisterOpt<PreSelection> X("preselect",
-                                   "Specialize LLVM code for a target machine",
-                                   createPreSelectionPass);
-
-// PreSelection::getGlobalAddr: Put address of a global into a v. register.
-GetElementPtrInst* 
-PreSelection::getGlobalAddr(Value* ptr, Instruction* insertBefore)
-{
-  return (isa<GlobalValue>(ptr))
-    ? new GetElementPtrInst(ptr,
-                    std::vector<Value*>(1, ConstantSInt::get(Type::LongTy, 0U)),
-                    "addrOfGlobal", insertBefore)
-    : NULL;
-}
-
-
-//------------------------------------------------------------------------------
-// Instruction visitor methods to perform instruction-specific operations
-//------------------------------------------------------------------------------
-
-// Common work for *all* instructions.  This needs to be called explicitly
-// by other visit<InstructionType> functions.
-inline void
-PreSelection::visitInstruction(Instruction &I)
-{ 
-  visitOperands(I);              // Perform operand transformations
-}
-
-
-// GetElementPtr instructions: check if pointer is a global
-void
-PreSelection::visitGetElementPtrInst(GetElementPtrInst &I)
-{ 
-  // Check for a global and put its address into a register before this instr
-  if (GetElementPtrInst* gep = getGlobalAddr(I.getPointerOperand(), &I))
-    I.setOperand(I.getPointerOperandIndex(), gep); // replace pointer operand
-
-  // Decompose multidimensional array references
-  DecomposeArrayRef(&I);
-
-  // Perform other transformations common to all instructions
-  visitInstruction(I);
-}
-
-
-// Load instructions: check if pointer is a global
-void
-PreSelection::visitLoadInst(LoadInst &I)
-{ 
-  // Check for a global and put its address into a register before this instr
-  if (GetElementPtrInst* gep = getGlobalAddr(I.getPointerOperand(), &I))
-    I.setOperand(I.getPointerOperandIndex(), gep); // replace pointer operand
-
-  // Perform other transformations common to all instructions
-  visitInstruction(I);
-}
-
-
-// Store instructions: check if pointer is a global
-void
-PreSelection::visitStoreInst(StoreInst &I)
-{ 
-  // Check for a global and put its address into a register before this instr
-  if (GetElementPtrInst* gep = getGlobalAddr(I.getPointerOperand(), &I))
-    I.setOperand(I.getPointerOperandIndex(), gep); // replace pointer operand
-
-  // Perform other transformations common to all instructions
-  visitInstruction(I);
-}
-
-
-// visitOperands() transforms individual operands of all instructions:
-// -- Load "large" int constants into a virtual register.  What is large
-//    depends on the type of instruction and on the target architecture.
-// -- For any constants that cannot be put in an immediate field,
-//    load address into virtual register first, and then load the constant.
-// 
-void
-PreSelection::visitOperands(Instruction &I)
-{
-  // For any instruction other than PHI, copies go just before the instr.
-  // For a PHI, operand copies must be before the terminator of the
-  // appropriate predecessor basic block.  Remaining logic is simple
-  // so just handle PHIs and other instructions separately.
-  // 
-  if (PHINode* phi = dyn_cast<PHINode>(&I))
-    {
-      for (unsigned i=0, N=phi->getNumIncomingValues(); i < N; ++i)
-        if (Constant* CV = dyn_cast<Constant>(phi->getIncomingValue(i)))
-          this->visitOneOperand(I, CV, phi->getOperandNumForIncomingValue(i),
-                                * phi->getIncomingBlock(i)->getTerminator());
-    }
-  else
-    for (unsigned i=0, N=I.getNumOperands(); i < N; ++i)
-      if (Constant* CV = dyn_cast<Constant>(I.getOperand(i)))
-        this->visitOneOperand(I, CV, i, I);
-}
-
-void
-PreSelection::visitOneOperand(Instruction &I, Constant* CV, unsigned opNum,
-                              Instruction& insertBefore)
-{
-  if (target.getInstrInfo().ConstantTypeMustBeLoaded(CV))
-    { // load address of constant into a register, then load the constant
-      GetElementPtrInst* gep = getGlobalAddr(getGlobalForConstant(CV),
-                                             &insertBefore);
-      LoadInst* ldI = new LoadInst(gep, "loadConst", &insertBefore);
-      I.setOperand(opNum, ldI);        // replace operand with copy in v.reg.
-    }
-  else if (target.getInstrInfo().ConstantMayNotFitInImmedField(CV, &I))
-    { // put the constant into a virtual register using a cast
-      CastInst* castI = new CastInst(CV, CV->getType(), "copyConst",
-                                     &insertBefore);
-      I.setOperand(opNum, castI);      // replace operand with copy in v.reg.
-    }
-}
-
-//===----------------------------------------------------------------------===//
-// createPreSelectionPass - Public entrypoint for pre-selection pass
-// and this file as a whole...
-//
-Pass*
-createPreSelectionPass(TargetMachine &T)
-{
-  return new PreSelection(T);
-}
-