this pass is unused

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32998 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 436 deletions

diff --git a/lib/Transforms/Instrumentation/TraceValues.cpp b/lib/Transforms/Instrumentation/TraceValues.cpp
deleted file mode 100644
index c3fbef2aad..0000000000
--- a/lib/Transforms/Instrumentation/TraceValues.cpp
+++ /dev/null
@@ -1,436 +0,0 @@
-//===- TraceValues.cpp - Value Tracing for debugging ----------------------===//
-//
-//                     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.
-//
-//===----------------------------------------------------------------------===//
-//
-// Support for inserting LLVM code to print values at basic block and function
-// exits.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Transforms/Instrumentation.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Instructions.h"
-#include "llvm/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/ADT/StringExtras.h"
-#include <algorithm>
-#include <sstream>
-using namespace llvm;
-
-static cl::opt<bool>
-DisablePtrHashing("tracedisablehashdisable", cl::Hidden,
-                  cl::desc("Disable pointer hashing in the -trace or -tracem "
-                           "passes"));
-
-static cl::list<std::string>
-TraceFuncNames("tracefunc", cl::desc("Only trace specific functions in the "
-                                     "-trace or -tracem passes"),
-               cl::value_desc("function"), cl::Hidden);
-
-static void TraceValuesAtBBExit(BasicBlock *BB,
-                                Constant *Printf, Constant* HashPtrToSeqNum,
-                             std::vector<Instruction*> *valuesStoredInFunction);
-
-// We trace a particular function if no functions to trace were specified
-// or if the function is in the specified list.
-//
-inline static bool
-TraceThisFunction(Function &F)
-{
-  if (TraceFuncNames.empty()) return true;
-
-  return std::find(TraceFuncNames.begin(), TraceFuncNames.end(), F.getName())
-                  != TraceFuncNames.end();
-}
-
-
-namespace {
-  struct ExternalFuncs {
-    Constant *PrintfFunc, *HashPtrFunc, *ReleasePtrFunc;
-    Constant *RecordPtrFunc, *PushOnEntryFunc, *ReleaseOnReturnFunc;
-    void doInitialization(Module &M); // Add prototypes for external functions
-  };
-
-  class InsertTraceCode : public FunctionPass {
-  protected:
-    ExternalFuncs externalFuncs;
-  public:
-
-    // Add a prototype for runtime functions not already in the program.
-    //
-    bool doInitialization(Module &M);
-
-    //--------------------------------------------------------------------------
-    // Function InsertCodeToTraceValues
-    //
-    // Inserts tracing code for all live values at basic block and/or function
-    // exits as specified by `traceBasicBlockExits' and `traceFunctionExits'.
-    //
-    bool doit(Function *M);
-
-    virtual void handleBasicBlock(BasicBlock *BB,
-                                  std::vector<Instruction*> &VI) = 0;
-
-    // runOnFunction - This method does the work.
-    //
-    bool runOnFunction(Function &F);
-
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-      AU.setPreservesCFG();
-    }
-  };
-
-  struct FunctionTracer : public InsertTraceCode {
-    // Ignore basic blocks here...
-    virtual void handleBasicBlock(BasicBlock *BB,
-                                  std::vector<Instruction*> &VI) {}
-  };
-
-  struct BasicBlockTracer : public InsertTraceCode {
-    // Trace basic blocks here...
-    virtual void handleBasicBlock(BasicBlock *BB,
-                                  std::vector<Instruction*> &VI) {
-      TraceValuesAtBBExit(BB, externalFuncs.PrintfFunc,
-                          externalFuncs.HashPtrFunc, &VI);
-    }
-  };
-
-  // Register the passes...
-  RegisterPass<FunctionTracer>  X("tracem","Insert Function trace code only");
-  RegisterPass<BasicBlockTracer> Y("trace","Insert BB and Function trace code");
-} // end anonymous namespace
-
-/// Just trace functions
-FunctionPass *llvm::createTraceValuesPassForFunction() {
-  return new FunctionTracer();
-}
-
-/// Trace BB's and functions
-FunctionPass *llvm::createTraceValuesPassForBasicBlocks() {
-  return new BasicBlockTracer();
-}
-
-// Add a prototype for external functions used by the tracing code and require
-// the trace library for this module.
-//
-void ExternalFuncs::doInitialization(Module &M) {
-  M.addLibrary("trace");
-  const Type *SBP = PointerType::get(Type::Int8Ty);
-  const FunctionType *MTy =
-    FunctionType::get(Type::Int32Ty, std::vector<const Type*>(1, SBP), true);
-  PrintfFunc = M.getOrInsertFunction("printf", MTy);
-
-  // uint (sbyte*)
-  HashPtrFunc = M.getOrInsertFunction("HashPointerToSeqNum", Type::Int32Ty, SBP,
-                                      (Type *)0);
-
-  // void (sbyte*)
-  ReleasePtrFunc = M.getOrInsertFunction("ReleasePointerSeqNum",
-                                         Type::VoidTy, SBP, (Type *)0);
-  RecordPtrFunc  = M.getOrInsertFunction("RecordPointer",
-                                         Type::VoidTy, SBP, (Type *)0);
-
-  PushOnEntryFunc = M.getOrInsertFunction("PushPointerSet", Type::VoidTy,
-                                          (Type *)0);
-  ReleaseOnReturnFunc = M.getOrInsertFunction("ReleasePointersPopSet",
-                                              Type::VoidTy, (Type *)0);
-}
-
-
-// Add a prototype for external functions used by the tracing code.
-//
-bool InsertTraceCode::doInitialization(Module &M) {
-  externalFuncs.doInitialization(M);
-  return false;
-}
-
-
-static inline GlobalVariable *getStringRef(Module *M, const std::string &str) {
-  // Create a constant internal string reference...
-  Constant *Init = ConstantArray::get(str);
-
-  // Create the global variable and record it in the module
-  // The GV will be renamed to a unique name if needed.
-  GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
-                                          GlobalValue::InternalLinkage, Init,
-                                          "trstr");
-  M->getGlobalList().push_back(GV);
-  return GV;
-}
-
-
-//
-// Check if this instruction has any uses outside its basic block,
-// or if it used by either a Call or Return instruction (ditto).
-// (Values stored to memory within this BB are live at end of BB but are
-// traced at the store instruction, not where they are computed.)
-//
-static inline bool LiveAtBBExit(const Instruction* I) {
-  const BasicBlock *BB = I->getParent();
-  for (Value::use_const_iterator U = I->use_begin(); U != I->use_end(); ++U)
-    if (const Instruction *UI = dyn_cast<Instruction>(*U))
-      if (UI->getParent() != BB || isa<ReturnInst>(UI))
-        return true;
-
-  return false;
-}
-
-
-static inline bool TraceThisOpCode(unsigned opCode) {
-  // Explicitly test for opCodes *not* to trace so that any new opcodes will
-  // be traced by default (VoidTy's are already excluded)
-  //
-  return (opCode  < Instruction::OtherOpsBegin &&
-          opCode != Instruction::Alloca &&
-          opCode != Instruction::PHI && ! Instruction::isCast(opCode));
-}
-
-
-// Trace a value computed by an instruction if it is non-void, it is computed
-// by a real computation, not just a copy (see TraceThisOpCode), and
-// -- it is a load instruction: we want to check values read from memory
-// -- or it is live at exit from the basic block (i.e., ignore local temps)
-//
-static bool ShouldTraceValue(const Instruction *I) {
-  return
-    I->getType() != Type::VoidTy &&
-    TraceThisOpCode(I->getOpcode()) &&
-    (isa<LoadInst>(I) || LiveAtBBExit(I));
-}
-
-static std::string getPrintfCodeFor(const Value *V) {
-  if (V == 0) return "";
-  if (V->getType()->isFloatingPoint())
-    return "%g";
-  else if (V->getType() == Type::LabelTy)
-    return "0x%p";
-  else if (isa<PointerType>(V->getType()))
-    return DisablePtrHashing ? "0x%p" : "%d";
-  else if (V->getType()->isIntegral())
-    return "%d";
-
-  assert(0 && "Illegal value to print out...");
-  return "";
-}
-
-
-static void InsertPrintInst(Value *V, BasicBlock *BB, Instruction *InsertBefore,
-                            std::string Message,
-                            Constant *Printf, Constant* HashPtrToSeqNum) {
-  // Escape Message by replacing all % characters with %% chars.
-  std::string Tmp;
-  std::swap(Tmp, Message);
-  std::string::iterator I = std::find(Tmp.begin(), Tmp.end(), '%');
-  while (I != Tmp.end()) {
-    Message.append(Tmp.begin(), I);
-    Message += "%%";
-    ++I; // Make sure to erase the % as well...
-    Tmp.erase(Tmp.begin(), I);
-    I = std::find(Tmp.begin(), Tmp.end(), '%');
-  }
-  Message += Tmp;
-  Module *Mod = BB->getParent()->getParent();
-
-  // Turn the marker string into a global variable...
-  GlobalVariable *fmtVal = getStringRef(Mod, Message+getPrintfCodeFor(V)+"\n");
-
-  // Turn the format string into an sbyte *
-  Constant *GEP=ConstantExpr::getGetElementPtr(fmtVal,
-                std::vector<Constant*>(2,Constant::getNullValue(Type::Int64Ty)));
-
-  // Insert a call to the hash function if this is a pointer value
-  if (V && isa<PointerType>(V->getType()) && !DisablePtrHashing) {
-    const Type *SBP = PointerType::get(Type::Int8Ty);
-    if (V->getType() != SBP)     // Cast pointer to be sbyte*
-      V = new BitCastInst(V, SBP, "Hash_cast", InsertBefore);
-
-    std::vector<Value*> HashArgs(1, V);
-    V = new CallInst(HashPtrToSeqNum, HashArgs, "ptrSeqNum", InsertBefore);
-  }
-
-  // Insert the first print instruction to print the string flag:
-  std::vector<Value*> PrintArgs;
-  PrintArgs.push_back(GEP);
-  if (V) PrintArgs.push_back(V);
-  new CallInst(Printf, PrintArgs, "trace", InsertBefore);
-}
-
-
-static void InsertVerbosePrintInst(Value *V, BasicBlock *BB,
-                                   Instruction *InsertBefore,
-                                   const std::string &Message, Constant *Printf,
-                                   Constant * HashPtrToSeqNum) {
-  std::ostringstream OutStr;
-  if (V) WriteAsOperand(OutStr, V);
-  InsertPrintInst(V, BB, InsertBefore, Message+OutStr.str()+" = ",
-                  Printf, HashPtrToSeqNum);
-}
-
-static void
-InsertReleaseInst(Value *V, BasicBlock *BB,
-                  Instruction *InsertBefore,
-                  Constant *ReleasePtrFunc) {
-
-  const Type *SBP = PointerType::get(Type::Int8Ty);
-  if (V->getType() != SBP)    // Cast pointer to be sbyte*
-    V = new BitCastInst(V, SBP, "RPSN_cast", InsertBefore);
-
-  std::vector<Value*> releaseArgs(1, V);
-  new CallInst(ReleasePtrFunc, releaseArgs, "", InsertBefore);
-}
-
-static void
-InsertRecordInst(Value *V, BasicBlock *BB,
-                 Instruction *InsertBefore,
-                 Constant *RecordPtrFunc) {
-    const Type *SBP = PointerType::get(Type::Int8Ty);
-  if (V->getType() != SBP)     // Cast pointer to be sbyte*
-    V = new BitCastInst(V, SBP, "RP_cast", InsertBefore);
-
-  std::vector<Value*> releaseArgs(1, V);
-  new CallInst(RecordPtrFunc, releaseArgs, "", InsertBefore);
-}
-
-// Look for alloca and free instructions. These are the ptrs to release.
-// Release the free'd pointers immediately.  Record the alloca'd pointers
-// to be released on return from the current function.
-//
-static void
-ReleasePtrSeqNumbers(BasicBlock *BB,
-                     ExternalFuncs& externalFuncs) {
-
-  for (BasicBlock::iterator II=BB->begin(), IE = BB->end(); II != IE; ++II)
-    if (FreeInst *FI = dyn_cast<FreeInst>(II))
-      InsertReleaseInst(FI->getOperand(0), BB, FI,externalFuncs.ReleasePtrFunc);
-    else if (AllocaInst *AI = dyn_cast<AllocaInst>(II))
-      InsertRecordInst(AI, BB, AI->getNext(), externalFuncs.RecordPtrFunc);
-}
-
-
-// Insert print instructions at the end of basic block BB for each value
-// computed in BB that is live at the end of BB,
-// or that is stored to memory in BB.
-// If the value is stored to memory, we load it back before printing it
-// We also return all such loaded values in the vector valuesStoredInFunction
-// for printing at the exit from the function.  (Note that in each invocation
-// of the function, this will only get the last value stored for each static
-// store instruction).
-//
-static void TraceValuesAtBBExit(BasicBlock *BB,
-                                Constant *Printf, Constant * HashPtrToSeqNum,
-                            std::vector<Instruction*> *valuesStoredInFunction) {
-  // Get an iterator to point to the insertion location, which is
-  // just before the terminator instruction.
-  //
-  TerminatorInst *InsertPos = BB->getTerminator();
-
-  std::ostringstream OutStr;
-  WriteAsOperand(OutStr, BB, false);
-  InsertPrintInst(0, BB, InsertPos, "LEAVING BB:" + OutStr.str(),
-                  Printf, HashPtrToSeqNum);
-
-  // Insert a print instruction for each instruction preceding InsertPos.
-  // The print instructions must go before InsertPos, so we use the
-  // instruction *preceding* InsertPos to check when to terminate the loop.
-  //
-  for (BasicBlock::iterator II = BB->begin(); &*II != InsertPos; ++II) {
-    if (StoreInst *SI = dyn_cast<StoreInst>(II)) {
-      // Trace the stored value and address
-      InsertVerbosePrintInst(SI->getOperand(0), BB, InsertPos,
-                             "  (store value) ", Printf, HashPtrToSeqNum);
-      InsertVerbosePrintInst(SI->getOperand(1), BB, InsertPos,
-                             "  (store addr ) ", Printf, HashPtrToSeqNum);
-    }
-    else if (ShouldTraceValue(II))
-      InsertVerbosePrintInst(II, BB, InsertPos, "  ", Printf, HashPtrToSeqNum);
-  }
-}
-
-static inline void InsertCodeToShowFunctionEntry(Function &F, Constant *Printf,
-                                                 Constant * HashPtrToSeqNum){
-  // Get an iterator to point to the insertion location
-  BasicBlock &BB = F.getEntryBlock();
-  Instruction *InsertPos = BB.begin();
-
-  std::ostringstream OutStr;
-  WriteAsOperand(OutStr, &F);
-  InsertPrintInst(0, &BB, InsertPos, "ENTERING FUNCTION: " + OutStr.str(),
-                  Printf, HashPtrToSeqNum);
-
-  // Now print all the incoming arguments
-  unsigned ArgNo = 0;
-  for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I, ++ArgNo){
-    InsertVerbosePrintInst(I, &BB, InsertPos,
-                           "  Arg #" + utostr(ArgNo) + ": ", Printf,
-                           HashPtrToSeqNum);
-  }
-}
-
-
-static inline void InsertCodeToShowFunctionExit(BasicBlock *BB,
-                                                Constant *Printf,
-                                                Constant * HashPtrToSeqNum) {
-  // Get an iterator to point to the insertion location
-  ReturnInst *Ret = cast<ReturnInst>(BB->getTerminator());
-
-  std::ostringstream OutStr;
-  WriteAsOperand(OutStr, BB->getParent(), true);
-  InsertPrintInst(0, BB, Ret, "LEAVING  FUNCTION: " + OutStr.str(),
-                  Printf, HashPtrToSeqNum);
-
-  // print the return value, if any
-  if (BB->getParent()->getReturnType() != Type::VoidTy)
-    InsertPrintInst(Ret->getReturnValue(), BB, Ret, "  Returning: ",
-                    Printf, HashPtrToSeqNum);
-}
-
-
-bool InsertTraceCode::runOnFunction(Function &F) {
-  if (!TraceThisFunction(F))
-    return false;
-
-  std::vector<Instruction*> valuesStoredInFunction;
-  std::vector<BasicBlock*>  exitBlocks;
-
-  // Insert code to trace values at function entry
-  InsertCodeToShowFunctionEntry(F, externalFuncs.PrintfFunc,
-                                externalFuncs.HashPtrFunc);
-
-  // Push a pointer set for recording alloca'd pointers at entry.
-  if (!DisablePtrHashing)
-    new CallInst(externalFuncs.PushOnEntryFunc, std::vector<Value*>(), "",
-                 F.getEntryBlock().begin());
-
-  for (Function::iterator BB = F.begin(); BB != F.end(); ++BB) {
-    if (isa<ReturnInst>(BB->getTerminator()))
-      exitBlocks.push_back(BB); // record this as an exit block
-
-    // Insert trace code if this basic block is interesting...
-    handleBasicBlock(BB, valuesStoredInFunction);
-
-    if (!DisablePtrHashing)          // release seq. numbers on free/ret
-      ReleasePtrSeqNumbers(BB, externalFuncs);
-  }
-
-  for (unsigned i=0; i != exitBlocks.size(); ++i)
-    {
-      // Insert code to trace values at function exit
-      InsertCodeToShowFunctionExit(exitBlocks[i], externalFuncs.PrintfFunc,
-                                   externalFuncs.HashPtrFunc);
-
-      // Release all recorded pointers before RETURN.  Do this LAST!
-      if (!DisablePtrHashing)
-        new CallInst(externalFuncs.ReleaseOnReturnFunc, std::vector<Value*>(),
-                     "", exitBlocks[i]->getTerminator());
-    }
-
-  return true;
-}