Firtool.cpp

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//===- Firtool.cpp - Definitions for the firtool pipeline setup -*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
 
#include "circt/Firtool/Firtool.h"
#include "circt/Conversion/Passes.h"
#include "circt/Dialect/FIRRTL/FIRRTLOps.h"
#include "circt/Dialect/FIRRTL/Passes.h"
#include "circt/Dialect/HW/HWPasses.h"
#include "circt/Dialect/OM/OMPasses.h"
#include "circt/Dialect/SV/SVPasses.h"
#include "circt/Dialect/Seq/SeqPasses.h"
#include "circt/Dialect/Verif/VerifPasses.h"
#include "circt/Support/Passes.h"
#include "circt/Transforms/Passes.h"
#include "mlir/Transforms/Passes.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
 
using namespace llvm;
using namespace circt;
 
LogicalResult firtool::populatePreprocessTransforms(mlir::PassManager &pm,
                                                    const FirtoolOptions &opt) {
  pm.nest<firrtl::CircuitOp>().addPass(
      firrtl::createCheckRecursiveInstantiation());
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createCheckLayers());
  // Legalize away "open" aggregates to hw-only versions.
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerOpenAggs());
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createResolvePaths());
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerFIRRTLAnnotations(
      {/*ignoreAnnotationClassless=*/opt.shouldDisableClasslessAnnotations(),
       /*ignoreAnnotationUnknown=*/opt.shouldDisableUnknownAnnotations(),
       /*noRefTypePorts=*/opt.shouldLowerNoRefTypePortAnnotations()}));
 
  if (opt.shouldEnableDebugInfo())
    pm.nest<firrtl::CircuitOp>().addNestedPass<firrtl::FModuleOp>(
        firrtl::createMaterializeDebugInfo());
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerIntmodules(
      {/*fixupEICGWrapper=*/opt.shouldFixupEICGWrapper()}));
  pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
      firrtl::createLowerIntrinsics());
 
  if (auto mode = FirtoolOptions::toInferDomainsPassMode(opt.getDomainMode()))
    pm.nest<firrtl::CircuitOp>().addPass(firrtl::createInferDomains({*mode}));
 
  return success();
}
 
LogicalResult firtool::populateCHIRRTLToLowFIRRTL(mlir::PassManager &pm,
                                                  const FirtoolOptions &opt) {
  // TODO: Ensure instance graph and other passes can handle instance choice
  // then run this pass after all diagnostic passes have run.
  pm.addNestedPass<firrtl::CircuitOp>(firrtl::createSpecializeOption(
      {/*selectDefaultInstanceChoice*/ opt
           .shouldSelectDefaultInstanceChoice()}));
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerSignatures());
 
  // This pass is _not_ idempotent.  It preserves its controlling annotation for
  // use by ExtractInstances.  This pass should be run before ExtractInstances.
  //
  // TODO: This pass should be deleted.
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createInjectDUTHierarchy());
 
  if (!opt.shouldDisableOptimization()) {
    if (opt.shouldDisableCSEinClasses())
      pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
          mlir::createCSEPass());
    else
      pm.nest<firrtl::CircuitOp>().nestAny().addPass(mlir::createCSEPass());
  }
 
  pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
      firrtl::createPassiveWires());
 
  pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
      firrtl::createDropName({/*preserveMode=*/opt.getPreserveMode()}));
 
  pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
      firrtl::createLowerCHIRRTLPass());
 
  // Run LowerMatches before InferWidths, as the latter does not support the
  // match statement, but it does support what they lower to.
  pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
      firrtl::createLowerMatches());
 
  // Width inference creates canonicalization opportunities.
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createInferWidths());
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createMemToRegOfVec(
      {/*replSeqMem=*/opt.shouldReplaceSequentialMemories(),
       /*replSeqMemFile=*/opt.shouldIgnoreReadEnableMemories()}));
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createInferResets());
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createDropConst());
 
  if (opt.shouldDedup()) {
    firrtl::DedupOptions opts;
    opts.dedupClasses = opt.shouldDedupClasses();
    pm.nest<firrtl::CircuitOp>().addPass(firrtl::createDedup(opts));
  }
 
  if (opt.shouldConvertVecOfBundle()) {
    pm.addNestedPass<firrtl::CircuitOp>(firrtl::createLowerFIRRTLTypes(
        {/*preserveAggregate=*/firrtl::PreserveAggregate::All,
         /*preserveMemories*/ firrtl::PreserveAggregate::All}));
    pm.addNestedPass<firrtl::CircuitOp>(firrtl::createVBToBV());
  }
 
  if (!opt.shouldLowerMemories())
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        firrtl::createFlattenMemory());
 
  // The input mlir file could be firrtl dialect so we might need to clean
  // things up.
  //  pm.addNestedPass<firrtl::CircuitOp>(firrtl::createLowerSignaturesPass());
  pm.addNestedPass<firrtl::CircuitOp>(firrtl::createLowerFIRRTLTypes(
      {/*preserveAggregate=*/opt.getPreserveAggregate(),
       /*preserveMemory=*/firrtl::PreserveAggregate::None}));
 
  {
    auto &modulePM = pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>();
    modulePM.addPass(firrtl::createExpandWhens());
    modulePM.addPass(firrtl::createSFCCompat());
  }
 
  pm.addNestedPass<firrtl::CircuitOp>(firrtl::createCheckCombLoops());
 
  // Must run this pass after all diagnostic passes have run, otherwise it can
  // hide errors.
  pm.addNestedPass<firrtl::CircuitOp>(firrtl::createSpecializeLayers());
 
  // Run after inference, layer specialization.
  if (opt.shouldConvertProbesToSignals())
    pm.nest<firrtl::CircuitOp>().addPass(firrtl::createProbesToSignals());
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createInliner());
 
  pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
      firrtl::createLayerMerge());
 
  // Preset the random initialization parameters for each module. The current
  // implementation assumes it can run at a time where every register is
  // currently in the final module it will be emitted in, all registers have
  // been created, and no registers have yet been removed.
  if (opt.isRandomEnabled(FirtoolOptions::RandomKind::Reg))
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        firrtl::createRandomizeRegisterInit());
 
  // If we parsed a FIRRTL file and have optimizations enabled, clean it up.
  if (!opt.shouldDisableOptimization())
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        createSimpleCanonicalizerPass());
 
  // Run the infer-rw pass, which merges read and write ports of a memory with
  // mutually exclusive enables.
  if (!opt.shouldDisableOptimization())
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        firrtl::createInferReadWrite());
 
  if (opt.shouldReplaceSequentialMemories())
    pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerMemory());
 
  if (!opt.shouldDisableOptimization())
    pm.nest<firrtl::CircuitOp>().addPass(firrtl::createIMConstProp());
 
  pm.addNestedPass<firrtl::CircuitOp>(firrtl::createAddSeqMemPorts());
 
  pm.addPass(firrtl::createCreateSiFiveMetadata(
      {/*replSeqMem=*/opt.shouldReplaceSequentialMemories(),
       /*replSeqMemFile=*/opt.getReplaceSequentialMemoriesFile().str()}));
 
  // This pass must be run after InjectDUTHierarchy.
  //
  // TODO: This pass should be deleted along with InjectDUTHierarchy.
  pm.addNestedPass<firrtl::CircuitOp>(firrtl::createExtractInstances());
 
  // Run SymbolDCE as late as possible, but before InnerSymbolDCE. This is for
  // hierpathop's and just for general cleanup.
  pm.addNestedPass<firrtl::CircuitOp>(mlir::createSymbolDCEPass());
 
  // Run InnerSymbolDCE as late as possible, but before IMDCE.
  pm.addPass(firrtl::createInnerSymbolDCE());
 
  // The above passes, IMConstProp in particular, introduce additional
  // canonicalization opportunities that we should pick up here before we
  // proceed to output-specific pipelines.
  if (!opt.shouldDisableOptimization()) {
    if (!opt.shouldDisableWireElimination())
      pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
          circt::firrtl::createEliminateWires());
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        createSimpleCanonicalizerPass());
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        circt::firrtl::createRegisterOptimizer());
    // Re-run IMConstProp to propagate constants produced by register
    // optimizations.
    pm.nest<firrtl::CircuitOp>().addPass(firrtl::createIMConstProp());
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        createSimpleCanonicalizerPass());
    pm.addPass(firrtl::createIMDeadCodeElim());
    if (opt.shouldInlineInputOnlyModules()) {
      pm.nest<firrtl::CircuitOp>().addPass(
          firrtl::createAnnotateInputOnlyModules());
      pm.nest<firrtl::CircuitOp>().addPass(firrtl::createInliner());
      pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
          createSimpleCanonicalizerPass());
    }
  }
 
  // Always run this, required for legalization.
  pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
      firrtl::createMergeConnections(
          {/*enableAggressiveMergin=*/!opt
               .shouldDisableAggressiveMergeConnections()}));
 
  if (!opt.shouldDisableOptimization())
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        firrtl::createVectorization());
 
  return success();
}
 
LogicalResult firtool::populateLowFIRRTLToHW(mlir::PassManager &pm,
                                             const FirtoolOptions &opt,
                                             StringRef inputFilename) {
  // Populate instance macros for instance choice operations before lowering to
  // HW.
  pm.nest<firrtl::CircuitOp>().addPass(
      firrtl::createPopulateInstanceChoiceSymbols());
 
  // Run layersink immediately before LowerXMR. LowerXMR will "freeze" the
  // location of probed objects by placing symbols on them. Run layersink first
  // so that probed objects can be sunk if possible.
  if (!opt.shouldDisableLayerSink() && !opt.shouldDisableOptimization())
    pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLayerSink());
 
  // Lower the ref.resolve and ref.send ops and remove the RefType ports.
  // LowerToHW cannot handle RefType so, this pass must be run to remove all
  // RefType ports and ops.
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerXMR());
 
  // Layer lowering passes.  Move operations into layers when possible and
  // remove layers by converting them to other constructs.  This lowering
  // process can create a few optimization opportunities.
  //
  // TODO: Improve LowerLayers to avoid the need for canonicalization. See:
  //   https://github.com/llvm/circt/issues/7896
 
  pm.nest<firrtl::CircuitOp>().addPass(
      firrtl::createLowerLayers({opt.getEmitAllBindFiles()}));
  if (!opt.shouldDisableOptimization())
    pm.nest<firrtl::CircuitOp>().nest<firrtl::FModuleOp>().addPass(
        createSimpleCanonicalizerPass());
 
  auto outputFilename = opt.getOutputFilename();
  if (outputFilename == "-")
    outputFilename = "";
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createAssignOutputDirs(
      {/*outputDirOption=*/outputFilename.str()}));
 
  // Run passes to resolve Grand Central features.  This should run before
  // BlackBoxReader because Grand Central needs to inform BlackBoxReader where
  // certain black boxes should be placed.  Note: all Grand Central Taps related
  // collateral is resolved entirely by LowerAnnotations.
  // Run this after output directories are (otherwise) assigned,
  // so generated interfaces can be appropriately marked.
  pm.addNestedPass<firrtl::CircuitOp>(
      firrtl::createGrandCentral({/*companionMode=*/opt.getCompanionMode(),
                                  /*noViews*/ opt.getNoViews()}));
 
  // Read black box source files into the IR.
  StringRef blackBoxRoot = opt.getBlackBoxRootPath().empty()
                               ? llvm::sys::path::parent_path(inputFilename)
                               : opt.getBlackBoxRootPath();
  pm.nest<firrtl::CircuitOp>().addPass(
      firrtl::createBlackBoxReader({/*inputPrefix=*/blackBoxRoot.str()}));
 
  // Remove TraceAnnotations and write their updated paths to an output
  // annotation file.
  pm.nest<firrtl::CircuitOp>().addPass(
      firrtl::createResolveTraces({opt.getOutputAnnotationFilename().str()}));
 
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerDPI());
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerDomains());
  pm.nest<firrtl::CircuitOp>().addPass(firrtl::createLowerClasses());
  pm.nest<firrtl::CircuitOp>().addPass(om::createVerifyObjectFieldsPass());
 
  // Check for static asserts.
  pm.nest<firrtl::CircuitOp>().addPass(circt::firrtl::createLint(
      {/*lintStaticAsserts=*/opt.getLintStaticAsserts(),
       /*lintXmrsInDesign=*/opt.getLintXmrsInDesign()}));
 
  pm.addPass(createLowerFIRRTLToHWPass(opt.shouldEnableAnnotationWarning(),
                                       opt.getVerificationFlavor()));
 
  if (!opt.shouldDisableOptimization()) {
    auto &modulePM = pm.nest<hw::HWModuleOp>();
    modulePM.addPass(mlir::createCSEPass());
    modulePM.addPass(createSimpleCanonicalizerPass());
  }
 
  // Check inner symbols and inner refs.
  pm.addPass(hw::createVerifyInnerRefNamespace());
 
  // Check OM object fields.
  pm.addPass(om::createVerifyObjectFieldsPass());
 
  // Run the verif op verification pass
  pm.addNestedPass<hw::HWModuleOp>(verif::createVerifyClockedAssertLikePass());
 
  return success();
}
 
LogicalResult firtool::populateHWToSV(mlir::PassManager &pm,
                                      const FirtoolOptions &opt) {
  pm.nestAny().addPass(verif::createStripContractsPass());
  pm.addPass(verif::createLowerTestsPass());
  pm.addPass(
      verif::createLowerSymbolicValuesPass({opt.getSymbolicValueLowering()}));
 
  pm.addPass(seq::createExternalizeClockGatePass(opt.getClockGateOptions()));
  pm.addPass(circt::createLowerSimToSVPass());
  pm.addPass(circt::createLowerSeqToSVPass(
      {/*disableRegRandomization=*/!opt.isRandomEnabled(
           FirtoolOptions::RandomKind::Reg),
       /*disableMemRandomization=*/
       !opt.isRandomEnabled(FirtoolOptions::RandomKind::Mem),
       /*emitSeparateAlwaysBlocks=*/
       opt.shouldEmitSeparateAlwaysBlocks()}));
  pm.addNestedPass<hw::HWModuleOp>(createLowerVerifToSVPass());
  pm.addPass(seq::createHWMemSimImplPass(
      {/*disableMemRandomization=*/!opt.isRandomEnabled(
           FirtoolOptions::RandomKind::Mem),
       /*disableRegRandomization=*/
       !opt.isRandomEnabled(FirtoolOptions::RandomKind::Reg),
       /*replSeqMem=*/opt.shouldReplaceSequentialMemories(),
       /*readEnableMode=*/opt.shouldIgnoreReadEnableMemories()
           ? seq::ReadEnableMode::Ignore
           : seq::ReadEnableMode::Undefined,
       /*addMuxPragmas=*/opt.shouldAddMuxPragmas(),
       /*addVivadoRAMAddressConflictSynthesisBugWorkaround=*/
       opt.shouldAddVivadoRAMAddressConflictSynthesisBugWorkaround()}));
 
  // If enabled, run the optimizer.
  if (!opt.shouldDisableOptimization()) {
    auto &modulePM = pm.nest<hw::HWModuleOp>();
    modulePM.addPass(mlir::createCSEPass());
    modulePM.addPass(createSimpleCanonicalizerPass());
    modulePM.addPass(mlir::createCSEPass());
    modulePM.addPass(sv::createHWCleanupPass(
        /*mergeAlwaysBlocks=*/!opt.shouldEmitSeparateAlwaysBlocks()));
  }
 
  // Check inner symbols and inner refs.
  pm.addPass(hw::createVerifyInnerRefNamespace());
 
  // Check OM object fields.
  pm.addPass(om::createVerifyObjectFieldsPass());
 
  return success();
}
 
namespace detail {
LogicalResult
populatePrepareForExportVerilog(mlir::PassManager &pm,
                                const firtool::FirtoolOptions &opt) {
 
  // Run the verif op verification pass
  pm.addNestedPass<hw::HWModuleOp>(verif::createVerifyClockedAssertLikePass());
 
  // Legalize unsupported operations within the modules.
  pm.nest<hw::HWModuleOp>().addPass(sv::createHWLegalizeModulesPass());
 
  // Tidy up the IR to improve verilog emission quality.
  if (!opt.shouldDisableOptimization())
    pm.nest<hw::HWModuleOp>().addPass(sv::createPrettifyVerilogPass());
 
  if (opt.shouldStripFirDebugInfo())
    pm.addPass(circt::createStripDebugInfoWithPredPass([](mlir::Location loc) {
      if (auto fileLoc = dyn_cast<FileLineColLoc>(loc))
        return fileLoc.getFilename().getValue().ends_with(".fir");
      return false;
    }));
 
  if (opt.shouldStripDebugInfo())
    pm.addPass(circt::createStripDebugInfoWithPredPass(
        [](mlir::Location loc) { return true; }));
 
  // Emit module and testbench hierarchy JSON files.
  if (opt.shouldExportModuleHierarchy())
    pm.addPass(sv::createHWExportModuleHierarchyPass());
 
  // Check inner symbols and inner refs.
  pm.addPass(hw::createVerifyInnerRefNamespace());
 
  // Check OM object fields.
  pm.addPass(om::createVerifyObjectFieldsPass());
 
  return success();
}
} // namespace detail
 
LogicalResult
firtool::populateExportVerilog(mlir::PassManager &pm, const FirtoolOptions &opt,
                               std::unique_ptr<llvm::raw_ostream> os) {
  if (failed(::detail::populatePrepareForExportVerilog(pm, opt)))
    return failure();
 
  pm.addPass(createExportVerilogPass(std::move(os)));
  return success();
}
 
LogicalResult firtool::populateExportVerilog(mlir::PassManager &pm,
                                             const FirtoolOptions &opt,
                                             llvm::raw_ostream &os) {
  if (failed(::detail::populatePrepareForExportVerilog(pm, opt)))
    return failure();
 
  pm.addPass(createExportVerilogPass(os));
  return success();
}
 
LogicalResult firtool::populateExportSplitVerilog(mlir::PassManager &pm,
                                                  const FirtoolOptions &opt,
                                                  llvm::StringRef directory) {
  if (failed(::detail::populatePrepareForExportVerilog(pm, opt)))
    return failure();
 
  pm.addPass(createExportSplitVerilogPass(directory));
  return success();
}
 
LogicalResult firtool::populateFinalizeIR(mlir::PassManager &pm,
                                          const FirtoolOptions &opt) {
  pm.addPass(firrtl::createFinalizeIR());
  pm.addPass(om::createFreezePathsPass());
 
  return success();
}
 
/// BTOR2 emission pipeline, triggered with `--btor2` flag.
LogicalResult firtool::populateHWToBTOR2(mlir::PassManager &pm,
                                         const FirtoolOptions &opt,
                                         llvm::raw_ostream &os) {
  auto &mpm = pm.nest<hw::HWModuleOp>();
  // Lower all supported `ltl` ops
  mpm.addPass(circt::createLowerLTLToCorePass());
  // LTLToCore can generate shiftreg which should be lowered before emission
  mpm.addPass(circt::seq::createLowerSeqShiftRegPass());
  // ShiftReg Lowering generates compreg.ce, which we don't support, so lower
  mpm.addPass(circt::seq::createLowerSeqCompRegCEPass());
  // Do final formal specific lowerings, e.g. inline wires eagerly
  mpm.addPass(circt::verif::createPrepareForFormalPass());
  pm.addPass(circt::hw::createFlattenModules());
  pm.addPass(circt::createConvertHWToBTOR2Pass(os));
  return success();
}
 
//===----------------------------------------------------------------------===//
// FIRTOOL CommandLine Options
//===----------------------------------------------------------------------===//
 
namespace {
/// This struct contains command line options that can be used to initialize
/// various bits of a Firtool pipeline. This uses a struct wrapper to avoid the
/// need for global command line options.
struct FirtoolCmdOptions {
  llvm::cl::opt<std::string> outputFilename{
      "o",
      llvm::cl::desc("Output filename, or directory for split output"),
      llvm::cl::value_desc("filename"),
      llvm::cl::init("-"),
  };
 
  llvm::cl::opt<bool> disableAnnotationsUnknown{
      "disable-annotation-unknown",
      llvm::cl::desc("Ignore unknown annotations when parsing"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> disableAnnotationsClassless{
      "disable-annotation-classless",
      llvm::cl::desc("Ignore annotations without a class when parsing"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> lowerAnnotationsNoRefTypePorts{
      "lower-annotations-no-ref-type-ports",
      llvm::cl::desc(
          "Create real ports instead of ref type ports when resolving "
          "wiring problems inside the LowerAnnotations pass"),
      llvm::cl::init(false), llvm::cl::Hidden};
 
  llvm::cl::opt<bool> probesToSignals{
      "probes-to-signals",
      llvm::cl::desc("Convert probes to non-probe signals"),
      llvm::cl::init(false), llvm::cl::Hidden};
 
  llvm::cl::opt<circt::firrtl::PreserveAggregate::PreserveMode>
      preserveAggregate{
          "preserve-aggregate",
          llvm::cl::desc("Specify input file format:"),
          llvm::cl::values(
              clEnumValN(circt::firrtl::PreserveAggregate::None, "none",
                         "Preserve no aggregate"),
              clEnumValN(circt::firrtl::PreserveAggregate::OneDimVec, "1d-vec",
                         "Preserve only 1d vectors of ground type"),
              clEnumValN(circt::firrtl::PreserveAggregate::Vec, "vec",
                         "Preserve only vectors"),
              clEnumValN(circt::firrtl::PreserveAggregate::All, "all",
                         "Preserve vectors and bundles")),
          llvm::cl::init(circt::firrtl::PreserveAggregate::None),
      };
 
  llvm::cl::opt<firrtl::PreserveValues::PreserveMode> preserveMode{
      "preserve-values",
      llvm::cl::desc("Specify the values which can be optimized away"),
      llvm::cl::values(
          clEnumValN(firrtl::PreserveValues::Strip, "strip",
                     "Strip all names. No name is preserved"),
          clEnumValN(firrtl::PreserveValues::None, "none",
                     "Names could be preserved by best-effort unlike `strip`"),
          clEnumValN(firrtl::PreserveValues::Named, "named",
                     "Preserve values with meaningful names"),
          clEnumValN(firrtl::PreserveValues::All, "all",
                     "Preserve all values")),
      llvm::cl::init(firrtl::PreserveValues::None)};
 
  llvm::cl::opt<bool> enableDebugInfo{
      "g", llvm::cl::desc("Enable the generation of debug information"),
      llvm::cl::init(false)};
 
  // Build mode options.
  llvm::cl::opt<firtool::FirtoolOptions::BuildMode> buildMode{
      "O", llvm::cl::desc("Controls how much optimization should be performed"),
      llvm::cl::values(clEnumValN(firtool::FirtoolOptions::BuildModeDebug,
                                  "debug",
                                  "Compile with only necessary optimizations"),
                       clEnumValN(firtool::FirtoolOptions::BuildModeRelease,
                                  "release", "Compile with optimizations")),
      llvm::cl::init(firtool::FirtoolOptions::BuildModeDefault)};
 
  llvm::cl::opt<bool> disableLayerSink{"disable-layer-sink",
                                       llvm::cl::desc("Disable layer sink"),
                                       cl::init(false)};
 
  llvm::cl::opt<bool> disableOptimization{
      "disable-opt",
      llvm::cl::desc("Disable optimizations"),
  };
 
  llvm::cl::opt<bool> vbToBV{
      "vb-to-bv",
      llvm::cl::desc("Transform vectors of bundles to bundles of vectors"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> noDedup{
      "no-dedup",
      llvm::cl::desc("Disable deduplication of structurally identical modules"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> dedupClasses{
      "dedup-classes",
      llvm::cl::desc(
          "Deduplicate FIRRTL classes, violating their nominal typing"),
      llvm::cl::init(true)};
 
  llvm::cl::opt<firrtl::CompanionMode> companionMode{
      "grand-central-companion-mode",
      llvm::cl::desc("Specifies the handling of Grand Central companions"),
      ::llvm::cl::values(
          clEnumValN(firrtl::CompanionMode::Bind, "bind",
                     "Lower companion instances to SystemVerilog binds"),
          clEnumValN(firrtl::CompanionMode::Instantiate, "instantiate",
                     "Instantiate companions in the design"),
          clEnumValN(firrtl::CompanionMode::Drop, "drop",
                     "Remove companions from the design")),
      llvm::cl::init(firrtl::CompanionMode::Bind),
      llvm::cl::Hidden,
  };
 
  llvm::cl::opt<bool> noViews{
      "no-views",
      llvm::cl::desc(
          "Disable lowering of FIRRTL view intrinsics (delete them instead)"),
      llvm::cl::init(false),
  };
 
  llvm::cl::opt<bool> disableAggressiveMergeConnections{
      "disable-aggressive-merge-connections",
      llvm::cl::desc(
          "Disable aggressive merge connections (i.e. merge all field-level "
          "connections into bulk connections)"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> lowerMemories{
      "lower-memories",
      llvm::cl::desc("Lower memories to have memories with masks as an "
                     "array with one memory per ground type"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<std::string> blackBoxRootPath{
      "blackbox-path",
      llvm::cl::desc(
          "Optional path to use as the root of black box annotations"),
      llvm::cl::value_desc("path"),
      llvm::cl::init(""),
  };
 
  llvm::cl::opt<bool> replSeqMem{
      "repl-seq-mem",
      llvm::cl::desc("Replace the seq mem for macro replacement and emit "
                     "relevant metadata"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<std::string> replSeqMemFile{
      "repl-seq-mem-file", llvm::cl::desc("File name for seq mem metadata"),
      llvm::cl::init("")};
 
  llvm::cl::opt<bool> ignoreReadEnableMem{
      "ignore-read-enable-mem",
      llvm::cl::desc("Ignore the read enable signal, instead of "
                     "assigning X on read disable"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<firtool::FirtoolOptions::RandomKind> disableRandom{
      llvm::cl::desc(
          "Disable random initialization code (may break semantics!)"),
      llvm::cl::values(
          clEnumValN(firtool::FirtoolOptions::RandomKind::Mem,
                     "disable-mem-randomization",
                     "Disable emission of memory randomization code"),
          clEnumValN(firtool::FirtoolOptions::RandomKind::Reg,
                     "disable-reg-randomization",
                     "Disable emission of register randomization code"),
          clEnumValN(firtool::FirtoolOptions::RandomKind::All,
                     "disable-all-randomization",
                     "Disable emission of all randomization code")),
      llvm::cl::init(firtool::FirtoolOptions::RandomKind::None)};
 
  llvm::cl::opt<std::string> outputAnnotationFilename{
      "output-annotation-file",
      llvm::cl::desc("Optional output annotation file"),
      llvm::cl::CommaSeparated, llvm::cl::value_desc("filename")};
 
  llvm::cl::opt<bool> enableAnnotationWarning{
      "warn-on-unprocessed-annotations",
      llvm::cl::desc(
          "Warn about annotations that were not removed by lower-to-hw"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> addMuxPragmas{
      "add-mux-pragmas",
      llvm::cl::desc("Annotate mux pragmas for memory array access"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<firrtl::VerificationFlavor> verificationFlavor{
      "verification-flavor",
      llvm::cl::desc("Specify a verification flavor used in LowerFIRRTLToHW"),
      llvm::cl::values(
          clEnumValN(firrtl::VerificationFlavor::None, "none",
                     "Use the flavor specified by the op"),
          clEnumValN(firrtl::VerificationFlavor::IfElseFatal, "if-else-fatal",
                     "Use Use `if(cond) else $fatal(..)` format"),
          clEnumValN(firrtl::VerificationFlavor::Immediate, "immediate",
                     "Use immediate verif statements"),
          clEnumValN(firrtl::VerificationFlavor::SVA, "sva", "Use SVA")),
      llvm::cl::init(firrtl::VerificationFlavor::None)};
 
  llvm::cl::opt<bool> emitSeparateAlwaysBlocks{
      "emit-separate-always-blocks",
      llvm::cl::desc(
          "Prevent always blocks from being merged and emit constructs into "
          "separate always blocks whenever possible"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> addVivadoRAMAddressConflictSynthesisBugWorkaround{
      "add-vivado-ram-address-conflict-synthesis-bug-workaround",
      llvm::cl::desc(
          "Add a vivado specific SV attribute (* ram_style = "
          "\"distributed\" *) to unpacked array registers as a workaronud "
          "for a vivado synthesis bug that incorrectly modifies "
          "address conflict behavivor of combinational memories"),
      llvm::cl::init(false)};
 
  //===----------------------------------------------------------------------===
  // External Clock Gate Options
  //===----------------------------------------------------------------------===
 
  llvm::cl::opt<std::string> ckgModuleName{
      "ckg-name", llvm::cl::desc("Clock gate module name"),
      llvm::cl::init("EICG_wrapper")};
 
  llvm::cl::opt<std::string> ckgInputName{
      "ckg-input", llvm::cl::desc("Clock gate input port name"),
      llvm::cl::init("in")};
 
  llvm::cl::opt<std::string> ckgOutputName{
      "ckg-output", llvm::cl::desc("Clock gate output port name"),
      llvm::cl::init("out")};
 
  llvm::cl::opt<std::string> ckgEnableName{
      "ckg-enable", llvm::cl::desc("Clock gate enable port name"),
      llvm::cl::init("en")};
 
  llvm::cl::opt<std::string> ckgTestEnableName{
      "ckg-test-enable",
      llvm::cl::desc("Clock gate test enable port name (optional)"),
      llvm::cl::init("test_en")};
 
  llvm::cl::opt<bool> exportModuleHierarchy{
      "export-module-hierarchy",
      llvm::cl::desc("Export module and instance hierarchy as JSON"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> stripFirDebugInfo{
      "strip-fir-debug-info",
      llvm::cl::desc(
          "Disable source fir locator information in output Verilog"),
      llvm::cl::init(true)};
 
  llvm::cl::opt<bool> stripDebugInfo{
      "strip-debug-info",
      llvm::cl::desc("Disable source locator information in output Verilog"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> fixupEICGWrapper{
      "fixup-eicg-wrapper",
      llvm::cl::desc("Lower `EICG_wrapper` modules into clock gate intrinsics"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> selectDefaultInstanceChoice{
      "select-default-for-unspecified-instance-choice",
      llvm::cl::desc(
          "Specialize instance choice to default, if no option selected"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<verif::SymbolicValueLowering> symbolicValueLowering{
      "symbolic-values",
      llvm::cl::desc("Control how symbolic values are lowered"),
      llvm::cl::init(verif::SymbolicValueLowering::ExtModule),
      verif::symbolicValueLoweringCLValues()};
 
  llvm::cl::opt<bool> disableWireElimination{
      "disable-wire-elimination", llvm::cl::desc("Disable wire elimination"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> emitAllBindFiles{
      "emit-all-bind-files",
      llvm::cl::desc("Emit bindfiles for private modules"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<bool> inlineInputOnlyModules{
      "inline-input-only-modules", llvm::cl::desc("Inline input-only modules"),
      llvm::cl::init(false)};
 
  llvm::cl::opt<firtool::FirtoolOptions::DomainMode> domainMode{
      "domain-mode", llvm::cl::desc("Enable domain inference and checking"),
      llvm::cl::init(firtool::FirtoolOptions::DomainMode::Strip),
      llvm::cl::values(
          clEnumValN(firtool::FirtoolOptions::DomainMode::Check, "check",
                     "Check domains without inference"),
          clEnumValN(firtool::FirtoolOptions::DomainMode::Disable, "disable",
                     "Disable domain checking"),
          clEnumValN(firtool::FirtoolOptions::DomainMode::Infer, "infer",
                     "Check domains with inference for private modules"),
          clEnumValN(firtool::FirtoolOptions::DomainMode::InferAll, "infer-all",
                     "Check domains with inference for both public and private "
                     "modules"),
          clEnumValN(firtool::FirtoolOptions::DomainMode::Strip, "strip",
                     "Erase all domain information"))};
 
  //===----------------------------------------------------------------------===
  // Lint options
  //===----------------------------------------------------------------------===
 
  llvm::cl::opt<bool> lintStaticAsserts{
      "lint-static-asserts", llvm::cl::desc("Lint static assertions"),
      llvm::cl::init(true)};
  // TODO: Change this default to 'true' once this has been better tested and
  // `-sv-extract-test-code` has been removed.
  llvm::cl::opt<bool> lintXmrsInDesign{
      "lint-xmrs-in-design", llvm::cl::desc("Lint XMRs in the design"),
      llvm::cl::init(false)};
};
} // namespace
 
static llvm::ManagedStatic<FirtoolCmdOptions> clOptions;
 
/// Register a set of useful command-line options that can be used to configure
/// various flags within the MLIRContext. These flags are used when constructing
/// an MLIR context for initialization.
void circt::firtool::registerFirtoolCLOptions() {
  // Make sure that the options struct has been initialized.
  *clOptions;
}
 
// Initialize the firtool options with defaults supplied by the cl::opts above.
circt::firtool::FirtoolOptions::FirtoolOptions()
    : outputFilename("-"), disableAnnotationsUnknown(false),
      disableAnnotationsClassless(false), lowerAnnotationsNoRefTypePorts(false),
      probesToSignals(false),
      preserveAggregate(firrtl::PreserveAggregate::None),
      preserveMode(firrtl::PreserveValues::None), enableDebugInfo(false),
      buildMode(BuildModeRelease), disableLayerSink(false),
      disableOptimization(false), vbToBV(false), noDedup(false),
      dedupClasses(true), companionMode(firrtl::CompanionMode::Bind),
      noViews(false), disableAggressiveMergeConnections(false),
      lowerMemories(false), blackBoxRootPath(""), replSeqMem(false),
      replSeqMemFile(""), ignoreReadEnableMem(false),
      disableRandom(RandomKind::None), outputAnnotationFilename(""),
      enableAnnotationWarning(false), addMuxPragmas(false),
      verificationFlavor(firrtl::VerificationFlavor::None),
      emitSeparateAlwaysBlocks(false),
      addVivadoRAMAddressConflictSynthesisBugWorkaround(false),
      ckgModuleName("EICG_wrapper"), ckgInputName("in"), ckgOutputName("out"),
      ckgEnableName("en"), ckgTestEnableName("test_en"), ckgInstName("ckg"),
      exportModuleHierarchy(false), stripFirDebugInfo(true),
      stripDebugInfo(false), fixupEICGWrapper(false),
      disableCSEinClasses(false), selectDefaultInstanceChoice(false),
      symbolicValueLowering(verif::SymbolicValueLowering::ExtModule),
      disableWireElimination(false), lintStaticAsserts(true),
      lintXmrsInDesign(true), emitAllBindFiles(false),
      inlineInputOnlyModules(false), domainMode(DomainMode::Disable) {
  if (!clOptions.isConstructed())
    return;
  outputFilename = clOptions->outputFilename;
  disableAnnotationsUnknown = clOptions->disableAnnotationsUnknown;
  disableAnnotationsClassless = clOptions->disableAnnotationsClassless;
  lowerAnnotationsNoRefTypePorts = clOptions->lowerAnnotationsNoRefTypePorts;
  probesToSignals = clOptions->probesToSignals;
  preserveAggregate = clOptions->preserveAggregate;
  preserveMode = clOptions->preserveMode;
  enableDebugInfo = clOptions->enableDebugInfo;
  buildMode = clOptions->buildMode;
  disableLayerSink = clOptions->disableLayerSink;
  disableOptimization = clOptions->disableOptimization;
  vbToBV = clOptions->vbToBV;
  noDedup = clOptions->noDedup;
  dedupClasses = clOptions->dedupClasses;
  companionMode = clOptions->companionMode;
  noViews = clOptions->noViews;
  disableAggressiveMergeConnections =
      clOptions->disableAggressiveMergeConnections;
  lowerMemories = clOptions->lowerMemories;
  blackBoxRootPath = clOptions->blackBoxRootPath;
  replSeqMem = clOptions->replSeqMem;
  replSeqMemFile = clOptions->replSeqMemFile;
  ignoreReadEnableMem = clOptions->ignoreReadEnableMem;
  disableRandom = clOptions->disableRandom;
  outputAnnotationFilename = clOptions->outputAnnotationFilename;
  enableAnnotationWarning = clOptions->enableAnnotationWarning;
  addMuxPragmas = clOptions->addMuxPragmas;
  verificationFlavor = clOptions->verificationFlavor;
  emitSeparateAlwaysBlocks = clOptions->emitSeparateAlwaysBlocks;
  addVivadoRAMAddressConflictSynthesisBugWorkaround =
      clOptions->addVivadoRAMAddressConflictSynthesisBugWorkaround;
  ckgModuleName = clOptions->ckgModuleName;
  ckgInputName = clOptions->ckgInputName;
  ckgOutputName = clOptions->ckgOutputName;
  ckgEnableName = clOptions->ckgEnableName;
  ckgTestEnableName = clOptions->ckgTestEnableName;
  exportModuleHierarchy = clOptions->exportModuleHierarchy;
  stripFirDebugInfo = clOptions->stripFirDebugInfo;
  stripDebugInfo = clOptions->stripDebugInfo;
  fixupEICGWrapper = clOptions->fixupEICGWrapper;
  selectDefaultInstanceChoice = clOptions->selectDefaultInstanceChoice;
  symbolicValueLowering = clOptions->symbolicValueLowering;
  disableWireElimination = clOptions->disableWireElimination;
  lintStaticAsserts = clOptions->lintStaticAsserts;
  lintXmrsInDesign = clOptions->lintXmrsInDesign;
  emitAllBindFiles = clOptions->emitAllBindFiles;
  inlineInputOnlyModules = clOptions->inlineInputOnlyModules;
  domainMode = clOptions->domainMode;
}