Revert r332579 "[llvm-exegesis] Update to cover latency through another opcode."

The revision failed to update the ARM tests.

llvm-svn: 332580

1 files changed, 0 insertions, 249 deletions

diff --git a/llvm/tools/llvm-exegesis/lib/Assembler.cpp b/llvm/tools/llvm-exegesis/lib/Assembler.cpp
deleted file mode 100644
index 81185064eef..00000000000
--- a/llvm/tools/llvm-exegesis/lib/Assembler.cpp
+++ /dev/null
@@ -1,249 +0,0 @@
-//===-- Assembler.cpp -------------------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "Assembler.h"
-
-#include "llvm/CodeGen/GlobalISel/CallLowering.h"
-#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/TargetInstrInfo.h"
-#include "llvm/CodeGen/TargetPassConfig.h"
-#include "llvm/CodeGen/TargetSubtargetInfo.h"
-#include "llvm/ExecutionEngine/SectionMemoryManager.h"
-#include "llvm/IR/LegacyPassManager.h"
-#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/Support/MemoryBuffer.h"
-
-namespace exegesis {
-
-static constexpr const char ModuleID[] = "ExegesisInfoTest";
-static constexpr const char FunctionID[] = "foo";
-
-// Small utility function to add named passes.
-static bool addPass(llvm::PassManagerBase &PM, llvm::StringRef PassName,
-                    llvm::TargetPassConfig &TPC) {
-  const llvm::PassRegistry *PR = llvm::PassRegistry::getPassRegistry();
-  const llvm::PassInfo *PI = PR->getPassInfo(PassName);
-  if (!PI) {
-    llvm::errs() << " run-pass " << PassName << " is not registered.\n";
-    return true;
-  }
-
-  if (!PI->getNormalCtor()) {
-    llvm::errs() << " cannot create pass: " << PI->getPassName() << "\n";
-    return true;
-  }
-  llvm::Pass *P = PI->getNormalCtor()();
-  std::string Banner = std::string("After ") + std::string(P->getPassName());
-  PM.add(P);
-  TPC.printAndVerify(Banner);
-
-  return false;
-}
-
-// Creates a void MachineFunction with no argument.
-static llvm::MachineFunction &
-createVoidVoidMachineFunction(llvm::StringRef FunctionID, llvm::Module *Module,
-                              llvm::MachineModuleInfo *MMI) {
-  llvm::Type *const ReturnType = llvm::Type::getInt32Ty(Module->getContext());
-  llvm::FunctionType *FunctionType = llvm::FunctionType::get(ReturnType, false);
-  llvm::Function *const F = llvm::Function::Create(
-      FunctionType, llvm::GlobalValue::InternalLinkage, FunctionID, Module);
-  // Making sure we can create a MachineFunction out of this Function even if it
-  // contains no IR.
-  F->setIsMaterializable(true);
-  return MMI->getOrCreateMachineFunction(*F);
-}
-
-static void fillMachineFunction(llvm::MachineFunction &MF,
-                                llvm::ArrayRef<llvm::MCInst> Instructions) {
-  llvm::MachineBasicBlock *MBB = MF.CreateMachineBasicBlock();
-  MF.push_back(MBB);
-  const llvm::MCInstrInfo *MCII = MF.getTarget().getMCInstrInfo();
-  llvm::DebugLoc DL;
-  for (const llvm::MCInst &Inst : Instructions) {
-    const unsigned Opcode = Inst.getOpcode();
-    const llvm::MCInstrDesc &MCID = MCII->get(Opcode);
-    llvm::MachineInstrBuilder Builder = llvm::BuildMI(MBB, DL, MCID);
-    for (unsigned OpIndex = 0, E = Inst.getNumOperands(); OpIndex < E;
-         ++OpIndex) {
-      const llvm::MCOperand &Op = Inst.getOperand(OpIndex);
-      if (Op.isReg()) {
-        const bool IsDef = OpIndex < MCID.getNumDefs();
-        unsigned Flags = 0;
-        const llvm::MCOperandInfo &OpInfo = MCID.operands().begin()[OpIndex];
-        if (IsDef && !OpInfo.isOptionalDef())
-          Flags |= llvm::RegState::Define;
-        Builder.addReg(Op.getReg(), Flags);
-      } else if (Op.isImm()) {
-        Builder.addImm(Op.getImm());
-      } else {
-        llvm_unreachable("Not yet implemented");
-      }
-    }
-  }
-  // Insert the return code.
-  const llvm::TargetInstrInfo *TII = MF.getSubtarget().getInstrInfo();
-  if (TII->getReturnOpcode() < TII->getNumOpcodes()) {
-    llvm::BuildMI(MBB, DL, TII->get(TII->getReturnOpcode()));
-  } else {
-    llvm::MachineIRBuilder MIB(MF);
-    MIB.setMBB(*MBB);
-    MF.getSubtarget().getCallLowering()->lowerReturn(MIB, nullptr, 0);
-  }
-}
-
-static std::unique_ptr<llvm::Module>
-createModule(const std::unique_ptr<llvm::LLVMContext> &Context,
-             const llvm::DataLayout DL) {
-  auto Module = llvm::make_unique<llvm::Module>(ModuleID, *Context);
-  Module->setDataLayout(DL);
-  return Module;
-}
-
-llvm::BitVector getFunctionReservedRegs(const llvm::TargetMachine &TM) {
-  std::unique_ptr<llvm::LLVMContext> Context =
-      llvm::make_unique<llvm::LLVMContext>();
-  std::unique_ptr<llvm::Module> Module =
-      createModule(Context, TM.createDataLayout());
-  std::unique_ptr<llvm::MachineModuleInfo> MMI =
-      llvm::make_unique<llvm::MachineModuleInfo>(&TM);
-  llvm::MachineFunction &MF =
-      createVoidVoidMachineFunction(FunctionID, Module.get(), MMI.get());
-  // Saving reserved registers for client.
-  return MF.getSubtarget().getRegisterInfo()->getReservedRegs(MF);
-}
-
-void assembleToStream(std::unique_ptr<llvm::LLVMTargetMachine> TM,
-                      llvm::ArrayRef<llvm::MCInst> Instructions,
-                      llvm::raw_pwrite_stream &AsmStream) {
-  std::unique_ptr<llvm::LLVMContext> Context =
-      llvm::make_unique<llvm::LLVMContext>();
-  std::unique_ptr<llvm::Module> Module =
-      createModule(Context, TM->createDataLayout());
-  std::unique_ptr<llvm::MachineModuleInfo> MMI =
-      llvm::make_unique<llvm::MachineModuleInfo>(TM.get());
-  llvm::MachineFunction &MF =
-      createVoidVoidMachineFunction(FunctionID, Module.get(), MMI.get());
-
-  // We need to instruct the passes that we're done with SSA and virtual
-  // registers.
-  auto &Properties = MF.getProperties();
-  Properties.set(llvm::MachineFunctionProperties::Property::NoVRegs);
-  Properties.reset(llvm::MachineFunctionProperties::Property::IsSSA);
-  Properties.reset(llvm::MachineFunctionProperties::Property::TracksLiveness);
-  // prologue/epilogue pass needs the reserved registers to be frozen, this
-  // is usually done by the SelectionDAGISel pass.
-  MF.getRegInfo().freezeReservedRegs(MF);
-
-  // Fill the MachineFunction from the instructions.
-  fillMachineFunction(MF, Instructions);
-
-  // We create the pass manager, run the passes to populate AsmBuffer.
-  llvm::MCContext &MCContext = MMI->getContext();
-  llvm::legacy::PassManager PM;
-
-  llvm::TargetLibraryInfoImpl TLII(llvm::Triple(Module->getTargetTriple()));
-  PM.add(new llvm::TargetLibraryInfoWrapperPass(TLII));
-
-  llvm::TargetPassConfig *TPC = TM->createPassConfig(PM);
-  PM.add(TPC);
-  PM.add(MMI.release());
-  TPC->printAndVerify("MachineFunctionGenerator::assemble");
-  // Adding the following passes:
-  // - machineverifier: checks that the MachineFunction is well formed.
-  // - prologepilog: saves and restore callee saved registers.
-  for (const char *PassName : {"machineverifier", "prologepilog"})
-    if (addPass(PM, PassName, *TPC))
-      llvm::report_fatal_error("Unable to add a mandatory pass");
-  TPC->setInitialized();
-
-  // AsmPrinter is responsible for generating the assembly into AsmBuffer.
-  if (TM->addAsmPrinter(PM, AsmStream, llvm::TargetMachine::CGFT_ObjectFile,
-                        MCContext))
-    llvm::report_fatal_error("Cannot add AsmPrinter passes");
-
-  PM.run(*Module); // Run all the passes
-}
-
-llvm::object::OwningBinary<llvm::object::ObjectFile>
-getObjectFromBuffer(llvm::StringRef InputData) {
-  // Storing the generated assembly into a MemoryBuffer that owns the memory.
-  std::unique_ptr<llvm::MemoryBuffer> Buffer =
-      llvm::MemoryBuffer::getMemBufferCopy(InputData);
-  // Create the ObjectFile from the MemoryBuffer.
-  std::unique_ptr<llvm::object::ObjectFile> Obj = llvm::cantFail(
-      llvm::object::ObjectFile::createObjectFile(Buffer->getMemBufferRef()));
-  // Returning both the MemoryBuffer and the ObjectFile.
-  return llvm::object::OwningBinary<llvm::object::ObjectFile>(
-      std::move(Obj), std::move(Buffer));
-}
-
-llvm::object::OwningBinary<llvm::object::ObjectFile>
-getObjectFromFile(llvm::StringRef Filename) {
-  return llvm::cantFail(llvm::object::ObjectFile::createObjectFile(Filename));
-}
-
-namespace {
-
-// Implementation of this class relies on the fact that a single object with a
-// single function will be loaded into memory.
-class TrackingSectionMemoryManager : public llvm::SectionMemoryManager {
-public:
-  explicit TrackingSectionMemoryManager(uintptr_t *CodeSize)
-      : CodeSize(CodeSize) {}
-
-  uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
-                               unsigned SectionID,
-                               llvm::StringRef SectionName) override {
-    *CodeSize = Size;
-    return llvm::SectionMemoryManager::allocateCodeSection(
-        Size, Alignment, SectionID, SectionName);
-  }
-
-private:
-  uintptr_t *const CodeSize = nullptr;
-};
-
-} // namespace
-
-ExecutableFunction::ExecutableFunction(
-    std::unique_ptr<llvm::LLVMTargetMachine> TM,
-    llvm::object::OwningBinary<llvm::object::ObjectFile> &&ObjectFileHolder)
-    : Context(llvm::make_unique<llvm::LLVMContext>()) {
-  assert(ObjectFileHolder.getBinary() && "cannot create object file");
-  // Initializing the execution engine.
-  // We need to use the JIT EngineKind to be able to add an object file.
-  LLVMLinkInMCJIT();
-  uintptr_t CodeSize = 0;
-  std::string Error;
-  ExecEngine.reset(
-      llvm::EngineBuilder(createModule(Context, TM->createDataLayout()))
-          .setErrorStr(&Error)
-          .setMCPU(TM->getTargetCPU())
-          .setEngineKind(llvm::EngineKind::JIT)
-          .setMCJITMemoryManager(
-              llvm::make_unique<TrackingSectionMemoryManager>(&CodeSize))
-          .create(TM.release()));
-  if (!ExecEngine)
-    llvm::report_fatal_error(Error);
-  // Adding the generated object file containing the assembled function.
-  // The ExecutionEngine makes sure the object file is copied into an
-  // executable page.
-  ExecEngine->addObjectFile(std::move(ObjectFileHolder));
-  // Fetching function bytes.
-  FunctionBytes =
-      llvm::StringRef(reinterpret_cast<const char *>(
-                          ExecEngine->getFunctionAddress(FunctionID)),
-                      CodeSize);
-}
-
-} // namespace exegesis