Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo".  That is, most of
the earlier separate sub-projects with their own branches and tags were
consolidated into one top-level directory, and are now branched and
tagged together.

Updating the vendor area to match this layout is next.

1 files changed, 0 insertions, 1218 deletions

diff --git a/contrib/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp b/contrib/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
deleted file mode 100644
index 59950ffc4e9a..000000000000
--- a/contrib/llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp
+++ /dev/null
@@ -1,1218 +0,0 @@
-//===- GCOVProfiling.cpp - Insert edge counters for gcov profiling --------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This pass implements GCOV-style profiling. When this pass is run it emits
-// "gcno" files next to the existing source, and instruments the code that runs
-// to records the edges between blocks that run and emit a complementary "gcda"
-// file on exit.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/Hashing.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/Sequence.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/Analysis/EHPersonalities.h"
-#include "llvm/Analysis/TargetLibraryInfo.h"
-#include "llvm/IR/CFG.h"
-#include "llvm/IR/DebugInfo.h"
-#include "llvm/IR/DebugLoc.h"
-#include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/InstIterator.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/Regex.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Transforms/Instrumentation.h"
-#include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
-#include "llvm/Transforms/Utils/ModuleUtils.h"
-#include <algorithm>
-#include <memory>
-#include <string>
-#include <utility>
-using namespace llvm;
-
-#define DEBUG_TYPE "insert-gcov-profiling"
-
-static cl::opt<std::string>
-DefaultGCOVVersion("default-gcov-version", cl::init("402*"), cl::Hidden,
-                   cl::ValueRequired);
-static cl::opt<bool> DefaultExitBlockBeforeBody("gcov-exit-block-before-body",
-                                                cl::init(false), cl::Hidden);
-
-GCOVOptions GCOVOptions::getDefault() {
-  GCOVOptions Options;
-  Options.EmitNotes = true;
-  Options.EmitData = true;
-  Options.UseCfgChecksum = false;
-  Options.NoRedZone = false;
-  Options.FunctionNamesInData = true;
-  Options.ExitBlockBeforeBody = DefaultExitBlockBeforeBody;
-
-  if (DefaultGCOVVersion.size() != 4) {
-    llvm::report_fatal_error(std::string("Invalid -default-gcov-version: ") +
-                             DefaultGCOVVersion);
-  }
-  memcpy(Options.Version, DefaultGCOVVersion.c_str(), 4);
-  return Options;
-}
-
-namespace {
-class GCOVFunction;
-
-class GCOVProfiler {
-public:
-  GCOVProfiler() : GCOVProfiler(GCOVOptions::getDefault()) {}
-  GCOVProfiler(const GCOVOptions &Opts) : Options(Opts) {
-    assert((Options.EmitNotes || Options.EmitData) &&
-           "GCOVProfiler asked to do nothing?");
-    ReversedVersion[0] = Options.Version[3];
-    ReversedVersion[1] = Options.Version[2];
-    ReversedVersion[2] = Options.Version[1];
-    ReversedVersion[3] = Options.Version[0];
-    ReversedVersion[4] = '\0';
-  }
-  bool runOnModule(Module &M, const TargetLibraryInfo &TLI);
-
-private:
-  // Create the .gcno files for the Module based on DebugInfo.
-  void emitProfileNotes();
-
-  // Modify the program to track transitions along edges and call into the
-  // profiling runtime to emit .gcda files when run.
-  bool emitProfileArcs();
-
-  bool isFunctionInstrumented(const Function &F);
-  std::vector<Regex> createRegexesFromString(StringRef RegexesStr);
-  static bool doesFilenameMatchARegex(StringRef Filename,
-                                      std::vector<Regex> &Regexes);
-
-  // Get pointers to the functions in the runtime library.
-  FunctionCallee getStartFileFunc();
-  FunctionCallee getEmitFunctionFunc();
-  FunctionCallee getEmitArcsFunc();
-  FunctionCallee getSummaryInfoFunc();
-  FunctionCallee getEndFileFunc();
-
-  // Add the function to write out all our counters to the global destructor
-  // list.
-  Function *
-  insertCounterWriteout(ArrayRef<std::pair<GlobalVariable *, MDNode *>>);
-  Function *insertFlush(ArrayRef<std::pair<GlobalVariable *, MDNode *>>);
-
-  void AddFlushBeforeForkAndExec();
-
-  enum class GCovFileType { GCNO, GCDA };
-  std::string mangleName(const DICompileUnit *CU, GCovFileType FileType);
-
-  GCOVOptions Options;
-
-  // Reversed, NUL-terminated copy of Options.Version.
-  char ReversedVersion[5];
-  // Checksum, produced by hash of EdgeDestinations
-  SmallVector<uint32_t, 4> FileChecksums;
-
-  Module *M;
-  const TargetLibraryInfo *TLI;
-  LLVMContext *Ctx;
-  SmallVector<std::unique_ptr<GCOVFunction>, 16> Funcs;
-  std::vector<Regex> FilterRe;
-  std::vector<Regex> ExcludeRe;
-  StringMap<bool> InstrumentedFiles;
-};
-
-class GCOVProfilerLegacyPass : public ModulePass {
-public:
-  static char ID;
-  GCOVProfilerLegacyPass()
-      : GCOVProfilerLegacyPass(GCOVOptions::getDefault()) {}
-  GCOVProfilerLegacyPass(const GCOVOptions &Opts)
-      : ModulePass(ID), Profiler(Opts) {
-    initializeGCOVProfilerLegacyPassPass(*PassRegistry::getPassRegistry());
-  }
-  StringRef getPassName() const override { return "GCOV Profiler"; }
-
-  bool runOnModule(Module &M) override {
-    auto &TLI = getAnalysis<TargetLibraryInfoWrapperPass>().getTLI();
-    return Profiler.runOnModule(M, TLI);
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.addRequired<TargetLibraryInfoWrapperPass>();
-  }
-
-private:
-  GCOVProfiler Profiler;
-};
-}
-
-char GCOVProfilerLegacyPass::ID = 0;
-INITIALIZE_PASS_BEGIN(
-    GCOVProfilerLegacyPass, "insert-gcov-profiling",
-    "Insert instrumentation for GCOV profiling", false, false)
-INITIALIZE_PASS_DEPENDENCY(TargetLibraryInfoWrapperPass)
-INITIALIZE_PASS_END(
-    GCOVProfilerLegacyPass, "insert-gcov-profiling",
-    "Insert instrumentation for GCOV profiling", false, false)
-
-ModulePass *llvm::createGCOVProfilerPass(const GCOVOptions &Options) {
-  return new GCOVProfilerLegacyPass(Options);
-}
-
-static StringRef getFunctionName(const DISubprogram *SP) {
-  if (!SP->getLinkageName().empty())
-    return SP->getLinkageName();
-  return SP->getName();
-}
-
-/// Extract a filename for a DISubprogram.
-///
-/// Prefer relative paths in the coverage notes. Clang also may split
-/// up absolute paths into a directory and filename component. When
-/// the relative path doesn't exist, reconstruct the absolute path.
-static SmallString<128> getFilename(const DISubprogram *SP) {
-  SmallString<128> Path;
-  StringRef RelPath = SP->getFilename();
-  if (sys::fs::exists(RelPath))
-    Path = RelPath;
-  else
-    sys::path::append(Path, SP->getDirectory(), SP->getFilename());
-  return Path;
-}
-
-namespace {
-  class GCOVRecord {
-   protected:
-    static const char *const LinesTag;
-    static const char *const FunctionTag;
-    static const char *const BlockTag;
-    static const char *const EdgeTag;
-
-    GCOVRecord() = default;
-
-    void writeBytes(const char *Bytes, int Size) {
-      os->write(Bytes, Size);
-    }
-
-    void write(uint32_t i) {
-      writeBytes(reinterpret_cast<char*>(&i), 4);
-    }
-
-    // Returns the length measured in 4-byte blocks that will be used to
-    // represent this string in a GCOV file
-    static unsigned lengthOfGCOVString(StringRef s) {
-      // A GCOV string is a length, followed by a NUL, then between 0 and 3 NULs
-      // padding out to the next 4-byte word. The length is measured in 4-byte
-      // words including padding, not bytes of actual string.
-      return (s.size() / 4) + 1;
-    }
-
-    void writeGCOVString(StringRef s) {
-      uint32_t Len = lengthOfGCOVString(s);
-      write(Len);
-      writeBytes(s.data(), s.size());
-
-      // Write 1 to 4 bytes of NUL padding.
-      assert((unsigned)(4 - (s.size() % 4)) > 0);
-      assert((unsigned)(4 - (s.size() % 4)) <= 4);
-      writeBytes("\0\0\0\0", 4 - (s.size() % 4));
-    }
-
-    raw_ostream *os;
-  };
-  const char *const GCOVRecord::LinesTag = "\0\0\x45\x01";
-  const char *const GCOVRecord::FunctionTag = "\0\0\0\1";
-  const char *const GCOVRecord::BlockTag = "\0\0\x41\x01";
-  const char *const GCOVRecord::EdgeTag = "\0\0\x43\x01";
-
-  class GCOVFunction;
-  class GCOVBlock;
-
-  // Constructed only by requesting it from a GCOVBlock, this object stores a
-  // list of line numbers and a single filename, representing lines that belong
-  // to the block.
-  class GCOVLines : public GCOVRecord {
-   public:
-    void addLine(uint32_t Line) {
-      assert(Line != 0 && "Line zero is not a valid real line number.");
-      Lines.push_back(Line);
-    }
-
-    uint32_t length() const {
-      // Here 2 = 1 for string length + 1 for '0' id#.
-      return lengthOfGCOVString(Filename) + 2 + Lines.size();
-    }
-
-    void writeOut() {
-      write(0);
-      writeGCOVString(Filename);
-      for (int i = 0, e = Lines.size(); i != e; ++i)
-        write(Lines[i]);
-    }
-
-    GCOVLines(StringRef F, raw_ostream *os)
-      : Filename(F) {
-      this->os = os;
-    }
-
-   private:
-    std::string Filename;
-    SmallVector<uint32_t, 32> Lines;
-  };
-
-
-  // Represent a basic block in GCOV. Each block has a unique number in the
-  // function, number of lines belonging to each block, and a set of edges to
-  // other blocks.
-  class GCOVBlock : public GCOVRecord {
-   public:
-    GCOVLines &getFile(StringRef Filename) {
-      return LinesByFile.try_emplace(Filename, Filename, os).first->second;
-    }
-
-    void addEdge(GCOVBlock &Successor) {
-      OutEdges.push_back(&Successor);
-    }
-
-    void writeOut() {
-      uint32_t Len = 3;
-      SmallVector<StringMapEntry<GCOVLines> *, 32> SortedLinesByFile;
-      for (auto &I : LinesByFile) {
-        Len += I.second.length();
-        SortedLinesByFile.push_back(&I);
-      }
-
-      writeBytes(LinesTag, 4);
-      write(Len);
-      write(Number);
-
-      llvm::sort(SortedLinesByFile, [](StringMapEntry<GCOVLines> *LHS,
-                                       StringMapEntry<GCOVLines> *RHS) {
-        return LHS->getKey() < RHS->getKey();
-      });
-      for (auto &I : SortedLinesByFile)
-        I->getValue().writeOut();
-      write(0);
-      write(0);
-    }
-
-    GCOVBlock(const GCOVBlock &RHS) : GCOVRecord(RHS), Number(RHS.Number) {
-      // Only allow copy before edges and lines have been added. After that,
-      // there are inter-block pointers (eg: edges) that won't take kindly to
-      // blocks being copied or moved around.
-      assert(LinesByFile.empty());
-      assert(OutEdges.empty());
-    }
-
-   private:
-    friend class GCOVFunction;
-
-    GCOVBlock(uint32_t Number, raw_ostream *os)
-        : Number(Number) {
-      this->os = os;
-    }
-
-    uint32_t Number;
-    StringMap<GCOVLines> LinesByFile;
-    SmallVector<GCOVBlock *, 4> OutEdges;
-  };
-
-  // A function has a unique identifier, a checksum (we leave as zero) and a
-  // set of blocks and a map of edges between blocks. This is the only GCOV
-  // object users can construct, the blocks and lines will be rooted here.
-  class GCOVFunction : public GCOVRecord {
-   public:
-     GCOVFunction(const DISubprogram *SP, Function *F, raw_ostream *os,
-                  uint32_t Ident, bool UseCfgChecksum, bool ExitBlockBeforeBody)
-         : SP(SP), Ident(Ident), UseCfgChecksum(UseCfgChecksum), CfgChecksum(0),
-           ReturnBlock(1, os) {
-      this->os = os;
-
-      LLVM_DEBUG(dbgs() << "Function: " << getFunctionName(SP) << "\n");
-
-      uint32_t i = 0;
-      for (auto &BB : *F) {
-        // Skip index 1 if it's assigned to the ReturnBlock.
-        if (i == 1 && ExitBlockBeforeBody)
-          ++i;
-        Blocks.insert(std::make_pair(&BB, GCOVBlock(i++, os)));
-      }
-      if (!ExitBlockBeforeBody)
-        ReturnBlock.Number = i;
-
-      std::string FunctionNameAndLine;
-      raw_string_ostream FNLOS(FunctionNameAndLine);
-      FNLOS << getFunctionName(SP) << SP->getLine();
-      FNLOS.flush();
-      FuncChecksum = hash_value(FunctionNameAndLine);
-    }
-
-    GCOVBlock &getBlock(BasicBlock *BB) {
-      return Blocks.find(BB)->second;
-    }
-
-    GCOVBlock &getReturnBlock() {
-      return ReturnBlock;
-    }
-
-    std::string getEdgeDestinations() {
-      std::string EdgeDestinations;
-      raw_string_ostream EDOS(EdgeDestinations);
-      Function *F = Blocks.begin()->first->getParent();
-      for (BasicBlock &I : *F) {
-        GCOVBlock &Block = getBlock(&I);
-        for (int i = 0, e = Block.OutEdges.size(); i != e; ++i)
-          EDOS << Block.OutEdges[i]->Number;
-      }
-      return EdgeDestinations;
-    }
-
-    uint32_t getFuncChecksum() {
-      return FuncChecksum;
-    }
-
-    void setCfgChecksum(uint32_t Checksum) {
-      CfgChecksum = Checksum;
-    }
-
-    void writeOut() {
-      writeBytes(FunctionTag, 4);
-      SmallString<128> Filename = getFilename(SP);
-      uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(getFunctionName(SP)) +
-                          1 + lengthOfGCOVString(Filename) + 1;
-      if (UseCfgChecksum)
-        ++BlockLen;
-      write(BlockLen);
-      write(Ident);
-      write(FuncChecksum);
-      if (UseCfgChecksum)
-        write(CfgChecksum);
-      writeGCOVString(getFunctionName(SP));
-      writeGCOVString(Filename);
-      write(SP->getLine());
-
-      // Emit count of blocks.
-      writeBytes(BlockTag, 4);
-      write(Blocks.size() + 1);
-      for (int i = 0, e = Blocks.size() + 1; i != e; ++i) {
-        write(0);  // No flags on our blocks.
-      }
-      LLVM_DEBUG(dbgs() << Blocks.size() << " blocks.\n");
-
-      // Emit edges between blocks.
-      if (Blocks.empty()) return;
-      Function *F = Blocks.begin()->first->getParent();
-      for (BasicBlock &I : *F) {
-        GCOVBlock &Block = getBlock(&I);
-        if (Block.OutEdges.empty()) continue;
-
-        writeBytes(EdgeTag, 4);
-        write(Block.OutEdges.size() * 2 + 1);
-        write(Block.Number);
-        for (int i = 0, e = Block.OutEdges.size(); i != e; ++i) {
-          LLVM_DEBUG(dbgs() << Block.Number << " -> "
-                            << Block.OutEdges[i]->Number << "\n");
-          write(Block.OutEdges[i]->Number);
-          write(0);  // no flags
-        }
-      }
-
-      // Emit lines for each block.
-      for (BasicBlock &I : *F)
-        getBlock(&I).writeOut();
-    }
-
-   private:
-     const DISubprogram *SP;
-    uint32_t Ident;
-    uint32_t FuncChecksum;
-    bool UseCfgChecksum;
-    uint32_t CfgChecksum;
-    DenseMap<BasicBlock *, GCOVBlock> Blocks;
-    GCOVBlock ReturnBlock;
-  };
-}
-
-// RegexesStr is a string containing differents regex separated by a semi-colon.
-// For example "foo\..*$;bar\..*$".
-std::vector<Regex> GCOVProfiler::createRegexesFromString(StringRef RegexesStr) {
-  std::vector<Regex> Regexes;
-  while (!RegexesStr.empty()) {
-    std::pair<StringRef, StringRef> HeadTail = RegexesStr.split(';');
-    if (!HeadTail.first.empty()) {
-      Regex Re(HeadTail.first);
-      std::string Err;
-      if (!Re.isValid(Err)) {
-        Ctx->emitError(Twine("Regex ") + HeadTail.first +
-                       " is not valid: " + Err);
-      }
-      Regexes.emplace_back(std::move(Re));
-    }
-    RegexesStr = HeadTail.second;
-  }
-  return Regexes;
-}
-
-bool GCOVProfiler::doesFilenameMatchARegex(StringRef Filename,
-                                           std::vector<Regex> &Regexes) {
-  for (Regex &Re : Regexes) {
-    if (Re.match(Filename)) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool GCOVProfiler::isFunctionInstrumented(const Function &F) {
-  if (FilterRe.empty() && ExcludeRe.empty()) {
-    return true;
-  }
-  SmallString<128> Filename = getFilename(F.getSubprogram());
-  auto It = InstrumentedFiles.find(Filename);
-  if (It != InstrumentedFiles.end()) {
-    return It->second;
-  }
-
-  SmallString<256> RealPath;
-  StringRef RealFilename;
-
-  // Path can be
-  // /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/*.h so for
-  // such a case we must get the real_path.
-  if (sys::fs::real_path(Filename, RealPath)) {
-    // real_path can fail with path like "foo.c".
-    RealFilename = Filename;
-  } else {
-    RealFilename = RealPath;
-  }
-
-  bool ShouldInstrument;
-  if (FilterRe.empty()) {
-    ShouldInstrument = !doesFilenameMatchARegex(RealFilename, ExcludeRe);
-  } else if (ExcludeRe.empty()) {
-    ShouldInstrument = doesFilenameMatchARegex(RealFilename, FilterRe);
-  } else {
-    ShouldInstrument = doesFilenameMatchARegex(RealFilename, FilterRe) &&
-                       !doesFilenameMatchARegex(RealFilename, ExcludeRe);
-  }
-  InstrumentedFiles[Filename] = ShouldInstrument;
-  return ShouldInstrument;
-}
-
-std::string GCOVProfiler::mangleName(const DICompileUnit *CU,
-                                     GCovFileType OutputType) {
-  bool Notes = OutputType == GCovFileType::GCNO;
-
-  if (NamedMDNode *GCov = M->getNamedMetadata("llvm.gcov")) {
-    for (int i = 0, e = GCov->getNumOperands(); i != e; ++i) {
-      MDNode *N = GCov->getOperand(i);
-      bool ThreeElement = N->getNumOperands() == 3;
-      if (!ThreeElement && N->getNumOperands() != 2)
-        continue;
-      if (dyn_cast<MDNode>(N->getOperand(ThreeElement ? 2 : 1)) != CU)
-        continue;
-
-      if (ThreeElement) {
-        // These nodes have no mangling to apply, it's stored mangled in the
-        // bitcode.
-        MDString *NotesFile = dyn_cast<MDString>(N->getOperand(0));
-        MDString *DataFile = dyn_cast<MDString>(N->getOperand(1));
-        if (!NotesFile || !DataFile)
-          continue;
-        return Notes ? NotesFile->getString() : DataFile->getString();
-      }
-
-      MDString *GCovFile = dyn_cast<MDString>(N->getOperand(0));
-      if (!GCovFile)
-        continue;
-
-      SmallString<128> Filename = GCovFile->getString();
-      sys::path::replace_extension(Filename, Notes ? "gcno" : "gcda");
-      return Filename.str();
-    }
-  }
-
-  SmallString<128> Filename = CU->getFilename();
-  sys::path::replace_extension(Filename, Notes ? "gcno" : "gcda");
-  StringRef FName = sys::path::filename(Filename);
-  SmallString<128> CurPath;
-  if (sys::fs::current_path(CurPath)) return FName;
-  sys::path::append(CurPath, FName);
-  return CurPath.str();
-}
-
-bool GCOVProfiler::runOnModule(Module &M, const TargetLibraryInfo &TLI) {
-  this->M = &M;
-  this->TLI = &TLI;
-  Ctx = &M.getContext();
-
-  AddFlushBeforeForkAndExec();
-
-  FilterRe = createRegexesFromString(Options.Filter);
-  ExcludeRe = createRegexesFromString(Options.Exclude);
-
-  if (Options.EmitNotes) emitProfileNotes();
-  if (Options.EmitData) return emitProfileArcs();
-  return false;
-}
-
-PreservedAnalyses GCOVProfilerPass::run(Module &M,
-                                        ModuleAnalysisManager &AM) {
-
-  GCOVProfiler Profiler(GCOVOpts);
-
-  auto &TLI = AM.getResult<TargetLibraryAnalysis>(M);
-  if (!Profiler.runOnModule(M, TLI))
-    return PreservedAnalyses::all();
-
-  return PreservedAnalyses::none();
-}
-
-static bool functionHasLines(Function &F) {
-  // Check whether this function actually has any source lines. Not only
-  // do these waste space, they also can crash gcov.
-  for (auto &BB : F) {
-    for (auto &I : BB) {
-      // Debug intrinsic locations correspond to the location of the
-      // declaration, not necessarily any statements or expressions.
-      if (isa<DbgInfoIntrinsic>(&I)) continue;
-
-      const DebugLoc &Loc = I.getDebugLoc();
-      if (!Loc)
-        continue;
-
-      // Artificial lines such as calls to the global constructors.
-      if (Loc.getLine() == 0) continue;
-
-      return true;
-    }
-  }
-  return false;
-}
-
-static bool isUsingScopeBasedEH(Function &F) {
-  if (!F.hasPersonalityFn()) return false;
-
-  EHPersonality Personality = classifyEHPersonality(F.getPersonalityFn());
-  return isScopedEHPersonality(Personality);
-}
-
-static bool shouldKeepInEntry(BasicBlock::iterator It) {
-	if (isa<AllocaInst>(*It)) return true;
-	if (isa<DbgInfoIntrinsic>(*It)) return true;
-	if (auto *II = dyn_cast<IntrinsicInst>(It)) {
-		if (II->getIntrinsicID() == llvm::Intrinsic::localescape) return true;
-	}
-
-	return false;
-}
-
-void GCOVProfiler::AddFlushBeforeForkAndExec() {
-  SmallVector<Instruction *, 2> ForkAndExecs;
-  for (auto &F : M->functions()) {
-    for (auto &I : instructions(F)) {
-      if (CallInst *CI = dyn_cast<CallInst>(&I)) {
-        if (Function *Callee = CI->getCalledFunction()) {
-          LibFunc LF;
-          if (TLI->getLibFunc(*Callee, LF) &&
-              (LF == LibFunc_fork || LF == LibFunc_execl ||
-               LF == LibFunc_execle || LF == LibFunc_execlp ||
-               LF == LibFunc_execv || LF == LibFunc_execvp ||
-               LF == LibFunc_execve || LF == LibFunc_execvpe ||
-               LF == LibFunc_execvP)) {
-            ForkAndExecs.push_back(&I);
-          }
-        }
-      }
-    }
-  }
-
-  // We need to split the block after the fork/exec call
-  // because else the counters for the lines after will be
-  // the same as before the call.
-  for (auto I : ForkAndExecs) {
-    IRBuilder<> Builder(I);
-    FunctionType *FTy = FunctionType::get(Builder.getVoidTy(), {}, false);
-    FunctionCallee GCOVFlush = M->getOrInsertFunction("__gcov_flush", FTy);
-    Builder.CreateCall(GCOVFlush);
-    I->getParent()->splitBasicBlock(I);
-  }
-}
-
-void GCOVProfiler::emitProfileNotes() {
-  NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
-  if (!CU_Nodes) return;
-
-  for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
-    // Each compile unit gets its own .gcno file. This means that whether we run
-    // this pass over the original .o's as they're produced, or run it after
-    // LTO, we'll generate the same .gcno files.
-
-    auto *CU = cast<DICompileUnit>(CU_Nodes->getOperand(i));
-
-    // Skip module skeleton (and module) CUs.
-    if (CU->getDWOId())
-      continue;
-
-    std::error_code EC;
-    raw_fd_ostream out(mangleName(CU, GCovFileType::GCNO), EC, sys::fs::F_None);
-    if (EC) {
-      Ctx->emitError(Twine("failed to open coverage notes file for writing: ") +
-                     EC.message());
-      continue;
-    }
-
-    std::string EdgeDestinations;
-
-    unsigned FunctionIdent = 0;
-    for (auto &F : M->functions()) {
-      DISubprogram *SP = F.getSubprogram();
-      if (!SP) continue;
-      if (!functionHasLines(F) || !isFunctionInstrumented(F))
-        continue;
-      // TODO: Functions using scope-based EH are currently not supported.
-      if (isUsingScopeBasedEH(F)) continue;
-
-      // gcov expects every function to start with an entry block that has a
-      // single successor, so split the entry block to make sure of that.
-      BasicBlock &EntryBlock = F.getEntryBlock();
-      BasicBlock::iterator It = EntryBlock.begin();
-      while (shouldKeepInEntry(It))
-        ++It;
-      EntryBlock.splitBasicBlock(It);
-
-      Funcs.push_back(make_unique<GCOVFunction>(SP, &F, &out, FunctionIdent++,
-                                                Options.UseCfgChecksum,
-                                                Options.ExitBlockBeforeBody));
-      GCOVFunction &Func = *Funcs.back();
-
-      // Add the function line number to the lines of the entry block
-      // to have a counter for the function definition.
-      uint32_t Line = SP->getLine();
-      auto Filename = getFilename(SP);
-      Func.getBlock(&EntryBlock).getFile(Filename).addLine(Line);
-
-      for (auto &BB : F) {
-        GCOVBlock &Block = Func.getBlock(&BB);
-        Instruction *TI = BB.getTerminator();
-        if (int successors = TI->getNumSuccessors()) {
-          for (int i = 0; i != successors; ++i) {
-            Block.addEdge(Func.getBlock(TI->getSuccessor(i)));
-          }
-        } else if (isa<ReturnInst>(TI)) {
-          Block.addEdge(Func.getReturnBlock());
-        }
-
-        for (auto &I : BB) {
-          // Debug intrinsic locations correspond to the location of the
-          // declaration, not necessarily any statements or expressions.
-          if (isa<DbgInfoIntrinsic>(&I)) continue;
-
-          const DebugLoc &Loc = I.getDebugLoc();
-          if (!Loc)
-            continue;
-
-          // Artificial lines such as calls to the global constructors.
-          if (Loc.getLine() == 0 || Loc.isImplicitCode())
-            continue;
-
-          if (Line == Loc.getLine()) continue;
-          Line = Loc.getLine();
-          if (SP != getDISubprogram(Loc.getScope()))
-            continue;
-
-          GCOVLines &Lines = Block.getFile(Filename);
-          Lines.addLine(Loc.getLine());
-        }
-        Line = 0;
-      }
-      EdgeDestinations += Func.getEdgeDestinations();
-    }
-
-    FileChecksums.push_back(hash_value(EdgeDestinations));
-    out.write("oncg", 4);
-    out.write(ReversedVersion, 4);
-    out.write(reinterpret_cast<char*>(&FileChecksums.back()), 4);
-
-    for (auto &Func : Funcs) {
-      Func->setCfgChecksum(FileChecksums.back());
-      Func->writeOut();
-    }
-
-    out.write("\0\0\0\0\0\0\0\0", 8);  // EOF
-    out.close();
-  }
-}
-
-bool GCOVProfiler::emitProfileArcs() {
-  NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
-  if (!CU_Nodes) return false;
-
-  bool Result = false;
-  for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
-    SmallVector<std::pair<GlobalVariable *, MDNode *>, 8> CountersBySP;
-    for (auto &F : M->functions()) {
-      DISubprogram *SP = F.getSubprogram();
-      if (!SP) continue;
-      if (!functionHasLines(F) || !isFunctionInstrumented(F))
-        continue;
-      // TODO: Functions using scope-based EH are currently not supported.
-      if (isUsingScopeBasedEH(F)) continue;
-      if (!Result) Result = true;
-
-      DenseMap<std::pair<BasicBlock *, BasicBlock *>, unsigned> EdgeToCounter;
-      unsigned Edges = 0;
-      for (auto &BB : F) {
-        Instruction *TI = BB.getTerminator();
-        if (isa<ReturnInst>(TI)) {
-          EdgeToCounter[{&BB, nullptr}] = Edges++;
-        } else {
-          for (BasicBlock *Succ : successors(TI)) {
-            EdgeToCounter[{&BB, Succ}] = Edges++;
-          }
-        }
-      }
-
-      ArrayType *CounterTy =
-        ArrayType::get(Type::getInt64Ty(*Ctx), Edges);
-      GlobalVariable *Counters =
-        new GlobalVariable(*M, CounterTy, false,
-                           GlobalValue::InternalLinkage,
-                           Constant::getNullValue(CounterTy),
-                           "__llvm_gcov_ctr");
-      CountersBySP.push_back(std::make_pair(Counters, SP));
-
-      // If a BB has several predecessors, use a PHINode to select
-      // the correct counter.
-      for (auto &BB : F) {
-        const unsigned EdgeCount =
-            std::distance(pred_begin(&BB), pred_end(&BB));
-        if (EdgeCount) {
-          // The phi node must be at the begin of the BB.
-          IRBuilder<> BuilderForPhi(&*BB.begin());
-          Type *Int64PtrTy = Type::getInt64PtrTy(*Ctx);
-          PHINode *Phi = BuilderForPhi.CreatePHI(Int64PtrTy, EdgeCount);
-          for (BasicBlock *Pred : predecessors(&BB)) {
-            auto It = EdgeToCounter.find({Pred, &BB});
-            assert(It != EdgeToCounter.end());
-            const unsigned Edge = It->second;
-            Value *EdgeCounter = BuilderForPhi.CreateConstInBoundsGEP2_64(
-                Counters->getValueType(), Counters, 0, Edge);
-            Phi->addIncoming(EdgeCounter, Pred);
-          }
-
-          // Skip phis, landingpads.
-          IRBuilder<> Builder(&*BB.getFirstInsertionPt());
-          Value *Count = Builder.CreateLoad(Builder.getInt64Ty(), Phi);
-          Count = Builder.CreateAdd(Count, Builder.getInt64(1));
-          Builder.CreateStore(Count, Phi);
-
-          Instruction *TI = BB.getTerminator();
-          if (isa<ReturnInst>(TI)) {
-            auto It = EdgeToCounter.find({&BB, nullptr});
-            assert(It != EdgeToCounter.end());
-            const unsigned Edge = It->second;
-            Value *Counter = Builder.CreateConstInBoundsGEP2_64(
-                Counters->getValueType(), Counters, 0, Edge);
-            Value *Count = Builder.CreateLoad(Builder.getInt64Ty(), Counter);
-            Count = Builder.CreateAdd(Count, Builder.getInt64(1));
-            Builder.CreateStore(Count, Counter);
-          }
-        }
-      }
-    }
-
-    Function *WriteoutF = insertCounterWriteout(CountersBySP);
-    Function *FlushF = insertFlush(CountersBySP);
-
-    // Create a small bit of code that registers the "__llvm_gcov_writeout" to
-    // be executed at exit and the "__llvm_gcov_flush" function to be executed
-    // when "__gcov_flush" is called.
-    FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
-    Function *F = Function::Create(FTy, GlobalValue::InternalLinkage,
-                                   "__llvm_gcov_init", M);
-    F->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
-    F->setLinkage(GlobalValue::InternalLinkage);
-    F->addFnAttr(Attribute::NoInline);
-    if (Options.NoRedZone)
-      F->addFnAttr(Attribute::NoRedZone);
-
-    BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", F);
-    IRBuilder<> Builder(BB);
-
-    FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
-    Type *Params[] = {
-      PointerType::get(FTy, 0),
-      PointerType::get(FTy, 0)
-    };
-    FTy = FunctionType::get(Builder.getVoidTy(), Params, false);
-
-    // Initialize the environment and register the local writeout and flush
-    // functions.
-    FunctionCallee GCOVInit = M->getOrInsertFunction("llvm_gcov_init", FTy);
-    Builder.CreateCall(GCOVInit, {WriteoutF, FlushF});
-    Builder.CreateRetVoid();
-
-    appendToGlobalCtors(*M, F, 0);
-  }
-
-  return Result;
-}
-
-FunctionCallee GCOVProfiler::getStartFileFunc() {
-  Type *Args[] = {
-    Type::getInt8PtrTy(*Ctx),  // const char *orig_filename
-    Type::getInt8PtrTy(*Ctx),  // const char version[4]
-    Type::getInt32Ty(*Ctx),    // uint32_t checksum
-  };
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
-  AttributeList AL;
-  if (auto AK = TLI->getExtAttrForI32Param(false))
-    AL = AL.addParamAttribute(*Ctx, 2, AK);
-  FunctionCallee Res = M->getOrInsertFunction("llvm_gcda_start_file", FTy, AL);
-  return Res;
-}
-
-FunctionCallee GCOVProfiler::getEmitFunctionFunc() {
-  Type *Args[] = {
-    Type::getInt32Ty(*Ctx),    // uint32_t ident
-    Type::getInt8PtrTy(*Ctx),  // const char *function_name
-    Type::getInt32Ty(*Ctx),    // uint32_t func_checksum
-    Type::getInt8Ty(*Ctx),     // uint8_t use_extra_checksum
-    Type::getInt32Ty(*Ctx),    // uint32_t cfg_checksum
-  };
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
-  AttributeList AL;
-  if (auto AK = TLI->getExtAttrForI32Param(false)) {
-    AL = AL.addParamAttribute(*Ctx, 0, AK);
-    AL = AL.addParamAttribute(*Ctx, 2, AK);
-    AL = AL.addParamAttribute(*Ctx, 3, AK);
-    AL = AL.addParamAttribute(*Ctx, 4, AK);
-  }
-  return M->getOrInsertFunction("llvm_gcda_emit_function", FTy);
-}
-
-FunctionCallee GCOVProfiler::getEmitArcsFunc() {
-  Type *Args[] = {
-    Type::getInt32Ty(*Ctx),     // uint32_t num_counters
-    Type::getInt64PtrTy(*Ctx),  // uint64_t *counters
-  };
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
-  AttributeList AL;
-  if (auto AK = TLI->getExtAttrForI32Param(false))
-    AL = AL.addParamAttribute(*Ctx, 0, AK);
-  return M->getOrInsertFunction("llvm_gcda_emit_arcs", FTy, AL);
-}
-
-FunctionCallee GCOVProfiler::getSummaryInfoFunc() {
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
-  return M->getOrInsertFunction("llvm_gcda_summary_info", FTy);
-}
-
-FunctionCallee GCOVProfiler::getEndFileFunc() {
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
-  return M->getOrInsertFunction("llvm_gcda_end_file", FTy);
-}
-
-Function *GCOVProfiler::insertCounterWriteout(
-    ArrayRef<std::pair<GlobalVariable *, MDNode *> > CountersBySP) {
-  FunctionType *WriteoutFTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
-  Function *WriteoutF = M->getFunction("__llvm_gcov_writeout");
-  if (!WriteoutF)
-    WriteoutF = Function::Create(WriteoutFTy, GlobalValue::InternalLinkage,
-                                 "__llvm_gcov_writeout", M);
-  WriteoutF->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
-  WriteoutF->addFnAttr(Attribute::NoInline);
-  if (Options.NoRedZone)
-    WriteoutF->addFnAttr(Attribute::NoRedZone);
-
-  BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", WriteoutF);
-  IRBuilder<> Builder(BB);
-
-  FunctionCallee StartFile = getStartFileFunc();
-  FunctionCallee EmitFunction = getEmitFunctionFunc();
-  FunctionCallee EmitArcs = getEmitArcsFunc();
-  FunctionCallee SummaryInfo = getSummaryInfoFunc();
-  FunctionCallee EndFile = getEndFileFunc();
-
-  NamedMDNode *CUNodes = M->getNamedMetadata("llvm.dbg.cu");
-  if (!CUNodes) {
-    Builder.CreateRetVoid();
-    return WriteoutF;
-  }
-
-  // Collect the relevant data into a large constant data structure that we can
-  // walk to write out everything.
-  StructType *StartFileCallArgsTy = StructType::create(
-      {Builder.getInt8PtrTy(), Builder.getInt8PtrTy(), Builder.getInt32Ty()});
-  StructType *EmitFunctionCallArgsTy = StructType::create(
-      {Builder.getInt32Ty(), Builder.getInt8PtrTy(), Builder.getInt32Ty(),
-       Builder.getInt8Ty(), Builder.getInt32Ty()});
-  StructType *EmitArcsCallArgsTy = StructType::create(
-      {Builder.getInt32Ty(), Builder.getInt64Ty()->getPointerTo()});
-  StructType *FileInfoTy =
-      StructType::create({StartFileCallArgsTy, Builder.getInt32Ty(),
-                          EmitFunctionCallArgsTy->getPointerTo(),
-                          EmitArcsCallArgsTy->getPointerTo()});
-
-  Constant *Zero32 = Builder.getInt32(0);
-  // Build an explicit array of two zeros for use in ConstantExpr GEP building.
-  Constant *TwoZero32s[] = {Zero32, Zero32};
-
-  SmallVector<Constant *, 8> FileInfos;
-  for (int i : llvm::seq<int>(0, CUNodes->getNumOperands())) {
-    auto *CU = cast<DICompileUnit>(CUNodes->getOperand(i));
-
-    // Skip module skeleton (and module) CUs.
-    if (CU->getDWOId())
-      continue;
-
-    std::string FilenameGcda = mangleName(CU, GCovFileType::GCDA);
-    uint32_t CfgChecksum = FileChecksums.empty() ? 0 : FileChecksums[i];
-    auto *StartFileCallArgs = ConstantStruct::get(
-        StartFileCallArgsTy, {Builder.CreateGlobalStringPtr(FilenameGcda),
-                              Builder.CreateGlobalStringPtr(ReversedVersion),
-                              Builder.getInt32(CfgChecksum)});
-
-    SmallVector<Constant *, 8> EmitFunctionCallArgsArray;
-    SmallVector<Constant *, 8> EmitArcsCallArgsArray;
-    for (int j : llvm::seq<int>(0, CountersBySP.size())) {
-      auto *SP = cast_or_null<DISubprogram>(CountersBySP[j].second);
-      uint32_t FuncChecksum = Funcs.empty() ? 0 : Funcs[j]->getFuncChecksum();
-      EmitFunctionCallArgsArray.push_back(ConstantStruct::get(
-          EmitFunctionCallArgsTy,
-          {Builder.getInt32(j),
-           Options.FunctionNamesInData
-               ? Builder.CreateGlobalStringPtr(getFunctionName(SP))
-               : Constant::getNullValue(Builder.getInt8PtrTy()),
-           Builder.getInt32(FuncChecksum),
-           Builder.getInt8(Options.UseCfgChecksum),
-           Builder.getInt32(CfgChecksum)}));
-
-      GlobalVariable *GV = CountersBySP[j].first;
-      unsigned Arcs = cast<ArrayType>(GV->getValueType())->getNumElements();
-      EmitArcsCallArgsArray.push_back(ConstantStruct::get(
-          EmitArcsCallArgsTy,
-          {Builder.getInt32(Arcs), ConstantExpr::getInBoundsGetElementPtr(
-                                       GV->getValueType(), GV, TwoZero32s)}));
-    }
-    // Create global arrays for the two emit calls.
-    int CountersSize = CountersBySP.size();
-    assert(CountersSize == (int)EmitFunctionCallArgsArray.size() &&
-           "Mismatched array size!");
-    assert(CountersSize == (int)EmitArcsCallArgsArray.size() &&
-           "Mismatched array size!");
-    auto *EmitFunctionCallArgsArrayTy =
-        ArrayType::get(EmitFunctionCallArgsTy, CountersSize);
-    auto *EmitFunctionCallArgsArrayGV = new GlobalVariable(
-        *M, EmitFunctionCallArgsArrayTy, /*isConstant*/ true,
-        GlobalValue::InternalLinkage,
-        ConstantArray::get(EmitFunctionCallArgsArrayTy,
-                           EmitFunctionCallArgsArray),
-        Twine("__llvm_internal_gcov_emit_function_args.") + Twine(i));
-    auto *EmitArcsCallArgsArrayTy =
-        ArrayType::get(EmitArcsCallArgsTy, CountersSize);
-    EmitFunctionCallArgsArrayGV->setUnnamedAddr(
-        GlobalValue::UnnamedAddr::Global);
-    auto *EmitArcsCallArgsArrayGV = new GlobalVariable(
-        *M, EmitArcsCallArgsArrayTy, /*isConstant*/ true,
-        GlobalValue::InternalLinkage,
-        ConstantArray::get(EmitArcsCallArgsArrayTy, EmitArcsCallArgsArray),
-        Twine("__llvm_internal_gcov_emit_arcs_args.") + Twine(i));
-    EmitArcsCallArgsArrayGV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
-
-    FileInfos.push_back(ConstantStruct::get(
-        FileInfoTy,
-        {StartFileCallArgs, Builder.getInt32(CountersSize),
-         ConstantExpr::getInBoundsGetElementPtr(EmitFunctionCallArgsArrayTy,
-                                                EmitFunctionCallArgsArrayGV,
-                                                TwoZero32s),
-         ConstantExpr::getInBoundsGetElementPtr(
-             EmitArcsCallArgsArrayTy, EmitArcsCallArgsArrayGV, TwoZero32s)}));
-  }
-
-  // If we didn't find anything to actually emit, bail on out.
-  if (FileInfos.empty()) {
-    Builder.CreateRetVoid();
-    return WriteoutF;
-  }
-
-  // To simplify code, we cap the number of file infos we write out to fit
-  // easily in a 32-bit signed integer. This gives consistent behavior between
-  // 32-bit and 64-bit systems without requiring (potentially very slow) 64-bit
-  // operations on 32-bit systems. It also seems unreasonable to try to handle
-  // more than 2 billion files.
-  if ((int64_t)FileInfos.size() > (int64_t)INT_MAX)
-    FileInfos.resize(INT_MAX);
-
-  // Create a global for the entire data structure so we can walk it more
-  // easily.
-  auto *FileInfoArrayTy = ArrayType::get(FileInfoTy, FileInfos.size());
-  auto *FileInfoArrayGV = new GlobalVariable(
-      *M, FileInfoArrayTy, /*isConstant*/ true, GlobalValue::InternalLinkage,
-      ConstantArray::get(FileInfoArrayTy, FileInfos),
-      "__llvm_internal_gcov_emit_file_info");
-  FileInfoArrayGV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
-
-  // Create the CFG for walking this data structure.
-  auto *FileLoopHeader =
-      BasicBlock::Create(*Ctx, "file.loop.header", WriteoutF);
-  auto *CounterLoopHeader =
-      BasicBlock::Create(*Ctx, "counter.loop.header", WriteoutF);
-  auto *FileLoopLatch = BasicBlock::Create(*Ctx, "file.loop.latch", WriteoutF);
-  auto *ExitBB = BasicBlock::Create(*Ctx, "exit", WriteoutF);
-
-  // We always have at least one file, so just branch to the header.
-  Builder.CreateBr(FileLoopHeader);
-
-  // The index into the files structure is our loop induction variable.
-  Builder.SetInsertPoint(FileLoopHeader);
-  PHINode *IV =
-      Builder.CreatePHI(Builder.getInt32Ty(), /*NumReservedValues*/ 2);
-  IV->addIncoming(Builder.getInt32(0), BB);
-  auto *FileInfoPtr = Builder.CreateInBoundsGEP(
-      FileInfoArrayTy, FileInfoArrayGV, {Builder.getInt32(0), IV});
-  auto *StartFileCallArgsPtr =
-      Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 0);
-  auto *StartFileCall = Builder.CreateCall(
-      StartFile,
-      {Builder.CreateLoad(StartFileCallArgsTy->getElementType(0),
-                          Builder.CreateStructGEP(StartFileCallArgsTy,
-                                                  StartFileCallArgsPtr, 0)),
-       Builder.CreateLoad(StartFileCallArgsTy->getElementType(1),
-                          Builder.CreateStructGEP(StartFileCallArgsTy,
-                                                  StartFileCallArgsPtr, 1)),
-       Builder.CreateLoad(StartFileCallArgsTy->getElementType(2),
-                          Builder.CreateStructGEP(StartFileCallArgsTy,
-                                                  StartFileCallArgsPtr, 2))});
-  if (auto AK = TLI->getExtAttrForI32Param(false))
-    StartFileCall->addParamAttr(2, AK);
-  auto *NumCounters =
-      Builder.CreateLoad(FileInfoTy->getElementType(1),
-                         Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 1));
-  auto *EmitFunctionCallArgsArray =
-      Builder.CreateLoad(FileInfoTy->getElementType(2),
-                         Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 2));
-  auto *EmitArcsCallArgsArray =
-      Builder.CreateLoad(FileInfoTy->getElementType(3),
-                         Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 3));
-  auto *EnterCounterLoopCond =
-      Builder.CreateICmpSLT(Builder.getInt32(0), NumCounters);
-  Builder.CreateCondBr(EnterCounterLoopCond, CounterLoopHeader, FileLoopLatch);
-
-  Builder.SetInsertPoint(CounterLoopHeader);
-  auto *JV = Builder.CreatePHI(Builder.getInt32Ty(), /*NumReservedValues*/ 2);
-  JV->addIncoming(Builder.getInt32(0), FileLoopHeader);
-  auto *EmitFunctionCallArgsPtr = Builder.CreateInBoundsGEP(
-      EmitFunctionCallArgsTy, EmitFunctionCallArgsArray, JV);
-  auto *EmitFunctionCall = Builder.CreateCall(
-      EmitFunction,
-      {Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(0),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
-                                                  EmitFunctionCallArgsPtr, 0)),
-       Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(1),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
-                                                  EmitFunctionCallArgsPtr, 1)),
-       Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(2),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
-                                                  EmitFunctionCallArgsPtr, 2)),
-       Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(3),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
-                                                  EmitFunctionCallArgsPtr, 3)),
-       Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(4),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
-                                                  EmitFunctionCallArgsPtr,
-                                                  4))});
-  if (auto AK = TLI->getExtAttrForI32Param(false)) {
-    EmitFunctionCall->addParamAttr(0, AK);
-    EmitFunctionCall->addParamAttr(2, AK);
-    EmitFunctionCall->addParamAttr(3, AK);
-    EmitFunctionCall->addParamAttr(4, AK);
-  }
-  auto *EmitArcsCallArgsPtr =
-      Builder.CreateInBoundsGEP(EmitArcsCallArgsTy, EmitArcsCallArgsArray, JV);
-  auto *EmitArcsCall = Builder.CreateCall(
-      EmitArcs,
-      {Builder.CreateLoad(
-           EmitArcsCallArgsTy->getElementType(0),
-           Builder.CreateStructGEP(EmitArcsCallArgsTy, EmitArcsCallArgsPtr, 0)),
-       Builder.CreateLoad(EmitArcsCallArgsTy->getElementType(1),
-                          Builder.CreateStructGEP(EmitArcsCallArgsTy,
-                                                  EmitArcsCallArgsPtr, 1))});
-  if (auto AK = TLI->getExtAttrForI32Param(false))
-    EmitArcsCall->addParamAttr(0, AK);
-  auto *NextJV = Builder.CreateAdd(JV, Builder.getInt32(1));
-  auto *CounterLoopCond = Builder.CreateICmpSLT(NextJV, NumCounters);
-  Builder.CreateCondBr(CounterLoopCond, CounterLoopHeader, FileLoopLatch);
-  JV->addIncoming(NextJV, CounterLoopHeader);
-
-  Builder.SetInsertPoint(FileLoopLatch);
-  Builder.CreateCall(SummaryInfo, {});
-  Builder.CreateCall(EndFile, {});
-  auto *NextIV = Builder.CreateAdd(IV, Builder.getInt32(1));
-  auto *FileLoopCond =
-      Builder.CreateICmpSLT(NextIV, Builder.getInt32(FileInfos.size()));
-  Builder.CreateCondBr(FileLoopCond, FileLoopHeader, ExitBB);
-  IV->addIncoming(NextIV, FileLoopLatch);
-
-  Builder.SetInsertPoint(ExitBB);
-  Builder.CreateRetVoid();
-
-  return WriteoutF;
-}
-
-Function *GCOVProfiler::
-insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> > CountersBySP) {
-  FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
-  Function *FlushF = M->getFunction("__llvm_gcov_flush");
-  if (!FlushF)
-    FlushF = Function::Create(FTy, GlobalValue::InternalLinkage,
-                              "__llvm_gcov_flush", M);
-  else
-    FlushF->setLinkage(GlobalValue::InternalLinkage);
-  FlushF->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
-  FlushF->addFnAttr(Attribute::NoInline);
-  if (Options.NoRedZone)
-    FlushF->addFnAttr(Attribute::NoRedZone);
-
-  BasicBlock *Entry = BasicBlock::Create(*Ctx, "entry", FlushF);
-
-  // Write out the current counters.
-  Function *WriteoutF = M->getFunction("__llvm_gcov_writeout");
-  assert(WriteoutF && "Need to create the writeout function first!");
-
-  IRBuilder<> Builder(Entry);
-  Builder.CreateCall(WriteoutF, {});
-
-  // Zero out the counters.
-  for (const auto &I : CountersBySP) {
-    GlobalVariable *GV = I.first;
-    Constant *Null = Constant::getNullValue(GV->getValueType());
-    Builder.CreateStore(Null, GV);
-  }
-
-  Type *RetTy = FlushF->getReturnType();
-  if (RetTy == Type::getVoidTy(*Ctx))
-    Builder.CreateRetVoid();
-  else if (RetTy->isIntegerTy())
-    // Used if __llvm_gcov_flush was implicitly declared.
-    Builder.CreateRet(ConstantInt::get(RetTy, 0));
-  else
-    report_fatal_error("invalid return type for __llvm_gcov_flush");
-
-  return FlushF;
-}