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📄 AliasAnalysis.h(51.98 KB)
📄 AliasAnalysisEvaluator.h(2.7 KB)
📄 AliasSetTracker.h(15.42 KB)
📄 AssumeBundleQueries.h(6.66 KB)
📄 AssumptionCache.h(8.39 KB)
📄 BasicAliasAnalysis.h(10.2 KB)
📄 BlockFrequencyInfo.h(5.59 KB)
📄 BlockFrequencyInfoImpl.h(56.46 KB)
📄 BranchProbabilityInfo.h(10.1 KB)
📄 CFG.h(7.76 KB)
📄 CFGPrinter.h(9.31 KB)
📄 CFLAliasAnalysisUtils.h(1.66 KB)
📄 CFLAndersAliasAnalysis.h(3.97 KB)
📄 CFLSteensAliasAnalysis.h(4.58 KB)
📄 CGSCCPassManager.h(41.2 KB)
📄 CallGraph.h(18.88 KB)
📄 CallGraphSCCPass.h(5.01 KB)
📄 CallPrinter.h(799 B)
📄 CaptureTracking.h(4.78 KB)
📄 CmpInstAnalysis.h(2.57 KB)
📄 CodeMetrics.h(3.15 KB)
📄 ConstantFolding.h(8.01 KB)
📄 DDG.h(19.15 KB)
📄 DOTGraphTraitsPass.h(5.5 KB)
📄 DemandedBits.h(4.07 KB)
📄 DependenceAnalysis.h(41.83 KB)
📄 DependenceGraphBuilder.h(7.74 KB)
📄 DivergenceAnalysis.h(7.38 KB)
📄 DomPrinter.h(1.04 KB)
📄 DomTreeUpdater.h(13.2 KB)
📄 DominanceFrontier.h(6.63 KB)
📄 DominanceFrontierImpl.h(7.12 KB)
📄 EHPersonalities.h(3.22 KB)
📄 GlobalsModRef.h(5.96 KB)
📄 GuardUtils.h(2.11 KB)
📄 HeatUtils.h(1.16 KB)
📄 IVDescriptors.h(14.56 KB)
📄 IVUsers.h(6.07 KB)
📄 IndirectCallPromotionAnalysis.h(2.61 KB)
📄 IndirectCallVisitor.h(1.16 KB)
📄 InlineAdvisor.h(8.71 KB)
📄 InlineCost.h(11.33 KB)
📄 InlineFeaturesAnalysis.h(1.5 KB)
📄 InlineModelFeatureMaps.h(3.41 KB)
📄 InlineSizeEstimatorAnalysis.h(1.07 KB)
📄 InstructionPrecedenceTracking.h(5.9 KB)
📄 InstructionSimplify.h(13.36 KB)
📄 Interval.h(4.84 KB)
📄 IntervalIterator.h(10.64 KB)
📄 IntervalPartition.h(4.05 KB)
📄 IteratedDominanceFrontier.h(2.62 KB)
📄 LazyBlockFrequencyInfo.h(4.34 KB)
📄 LazyBranchProbabilityInfo.h(4.21 KB)
📄 LazyCallGraph.h(50.13 KB)
📄 LazyValueInfo.h(5.4 KB)
📄 LegacyDivergenceAnalysis.h(2.53 KB)
📄 Lint.h(1.35 KB)
📄 Loads.h(7.86 KB)
📄 LoopAccessAnalysis.h(29.75 KB)
📄 LoopAnalysisManager.h(5.83 KB)
📄 LoopCacheAnalysis.h(11.91 KB)
📄 LoopInfo.h(48.27 KB)
📄 LoopInfoImpl.h(27.14 KB)
📄 LoopIterator.h(8.83 KB)
📄 LoopNestAnalysis.h(5.61 KB)
📄 LoopPass.h(4.29 KB)
📄 LoopUnrollAnalyzer.h(3.42 KB)
📄 MLInlineAdvisor.h(3.48 KB)
📄 MLModelRunner.h(1.16 KB)
📄 MemoryBuiltins.h(13.42 KB)
📄 MemoryDependenceAnalysis.h(20.82 KB)
📄 MemoryLocation.h(10.99 KB)
📄 MemorySSA.h(45.92 KB)
📄 MemorySSAUpdater.h(14.55 KB)
📄 ModuleSummaryAnalysis.h(3.44 KB)
📄 MustExecute.h(20.2 KB)
📄 ObjCARCAliasAnalysis.h(3.35 KB)
📄 ObjCARCAnalysisUtils.h(10.22 KB)
📄 ObjCARCInstKind.h(4.87 KB)
📄 OptimizationRemarkEmitter.h(5.93 KB)
📄 PHITransAddr.h(4.77 KB)
📄 Passes.h(3.88 KB)
📄 PhiValues.h(5.25 KB)
📄 PostDominators.h(3.41 KB)
📄 ProfileSummaryInfo.h(9.3 KB)
📄 PtrUseVisitor.h(9.96 KB)
📄 RegionInfo.h(35.23 KB)
📄 RegionInfoImpl.h(25.16 KB)
📄 RegionIterator.h(14.07 KB)
📄 RegionPass.h(4.05 KB)
📄 RegionPrinter.h(2.25 KB)
📄 ScalarEvolution.h(89.21 KB)
📄 ScalarEvolutionAliasAnalysis.h(2.09 KB)
📄 ScalarEvolutionDivision.h(2.48 KB)
📄 ScalarEvolutionExpressions.h(28.61 KB)
📄 ScalarEvolutionNormalization.h(2.47 KB)
📄 ScopedNoAliasAA.h(2.83 KB)
📄 SparsePropagation.h(19.43 KB)
📄 StackLifetime.h(6.16 KB)
📄 StackSafetyAnalysis.h(4.91 KB)
📄 SyncDependenceAnalysis.h(2.85 KB)
📄 SyntheticCountsUtils.h(1.85 KB)
📄 TargetFolder.h(11.04 KB)
📄 TargetLibraryInfo.def(55.35 KB)
📄 TargetLibraryInfo.h(16.86 KB)
📄 TargetTransformInfo.h(96.51 KB)
📄 TargetTransformInfoImpl.h(37.63 KB)
📄 Trace.h(4.1 KB)
📄 TypeBasedAliasAnalysis.h(3.05 KB)
📄 TypeMetadataUtils.h(1.94 KB)
📁 Utils
📄 ValueLattice.h(15.14 KB)
📄 ValueLatticeUtils.h(1.66 KB)
📄 ValueTracking.h(35.82 KB)
📄 VecFuncs.def(10.94 KB)
📄 VectorUtils.h(37.26 KB)

Editing: InlineAdvisor.h

//===- InlineAdvisor.h - Inlining decision making abstraction -*- 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
//
//===----------------------------------------------------------------------===//
//
#ifndef LLVM_INLINEADVISOR_H_
#define LLVM_INLINEADVISOR_H_

#include <memory>
#include <unordered_set>
#include <vector>

#include "llvm/Analysis/InlineCost.h"
#include "llvm/IR/PassManager.h"

namespace llvm {
class BasicBlock;
class CallBase;
class Function;
class Module;
class OptimizationRemarkEmitter;

/// There are 3 scenarios we can use the InlineAdvisor:
/// - Default - use manual heuristics.
///
/// - Release mode, the expected mode for production, day to day deployments.
/// In this mode, when building the compiler, we also compile a pre-trained ML
/// model to native code, and link it as a static library. This mode has low
/// overhead and no additional dependencies for the compiler runtime.
///
/// - Development mode, for training new models.
/// In this mode, we trade off runtime performance for flexibility. This mode
/// requires the full C Tensorflow API library, and evaluates models
/// dynamically. This mode also permits generating training logs, for offline
/// training.
enum class InliningAdvisorMode : int { Default, Release, Development };

class InlineAdvisor;
/// Capture state between an inlining decision having had been made, and
/// its impact being observable. When collecting model training data, this
/// allows recording features/decisions/partial reward data sets.
///
/// Derivations of this type are expected to be tightly coupled with their
/// InliningAdvisors. The base type implements the minimal contractual
/// obligations.
class InlineAdvice {
public:
  InlineAdvice(InlineAdvisor *Advisor, CallBase &CB,
               OptimizationRemarkEmitter &ORE, bool IsInliningRecommended);

InlineAdvice(InlineAdvice &&) = delete;
  InlineAdvice(const InlineAdvice &) = delete;
  virtual ~InlineAdvice() {
    assert(Recorded && "InlineAdvice should have been informed of the "
                       "inliner's decision in all cases");
  }

/// Exactly one of the record* APIs must be called. Implementers may extend
  /// behavior by implementing the corresponding record*Impl.
  ///
  /// Call after inlining succeeded, and did not result in deleting the callee.
  void recordInlining() {
    markRecorded();
    recordInliningImpl();
  }

/// Call after inlining succeeded, and resulted in deleting the callee.
  void recordInliningWithCalleeDeleted();

/// Call after the decision for a call site was to not inline.
  void recordUnsuccessfulInlining(const InlineResult &Result) {
    markRecorded();
    recordUnsuccessfulInliningImpl(Result);
  }

/// Call to indicate inlining was not attempted.
  void recordUnattemptedInlining() {
    markRecorded();
    recordUnattemptedInliningImpl();
  }

/// Get the inlining recommendation.
  bool isInliningRecommended() const { return IsInliningRecommended; }
  const DebugLoc &getOriginalCallSiteDebugLoc() const { return DLoc; }
  const BasicBlock *getOriginalCallSiteBasicBlock() const { return Block; }

protected:
  virtual void recordInliningImpl() {}
  virtual void recordInliningWithCalleeDeletedImpl() {}
  virtual void recordUnsuccessfulInliningImpl(const InlineResult &Result) {}
  virtual void recordUnattemptedInliningImpl() {}

InlineAdvisor *const Advisor;
  /// Caller and Callee are pre-inlining.
  Function *const Caller;
  Function *const Callee;

// Capture the context of CB before inlining, as a successful inlining may
  // change that context, and we want to report success or failure in the
  // original context.
  const DebugLoc DLoc;
  const BasicBlock *const Block;
  OptimizationRemarkEmitter &ORE;
  const bool IsInliningRecommended;

private:
  void markRecorded() {
    assert(!Recorded && "Recording should happen exactly once");
    Recorded = true;
  }

bool Recorded = false;
};

/// Interface for deciding whether to inline a call site or not.
class InlineAdvisor {
public:
  InlineAdvisor(InlineAdvisor &&) = delete;
  virtual ~InlineAdvisor() { freeDeletedFunctions(); }

/// Get an InlineAdvice containing a recommendation on whether to
  /// inline or not. \p CB is assumed to be a direct call. \p FAM is assumed to
  /// be up-to-date wrt previous inlining decisions.
  /// Returns an InlineAdvice with the inlining recommendation.
  virtual std::unique_ptr<InlineAdvice> getAdvice(CallBase &CB) = 0;

/// This must be called when the Inliner pass is entered, to allow the
  /// InlineAdvisor update internal state, as result of function passes run
  /// between Inliner pass runs (for the same module).
  virtual void onPassEntry() {}

/// This must be called when the Inliner pass is exited, as function passes
  /// may be run subsequently. This allows an implementation of InlineAdvisor
  /// to prepare for a partial update.
  virtual void onPassExit() {}

protected:
  InlineAdvisor(FunctionAnalysisManager &FAM) : FAM(FAM) {}

FunctionAnalysisManager &FAM;

/// We may want to defer deleting functions to after the inlining for a whole
  /// module has finished. This allows us to reliably use function pointers as
  /// unique identifiers, as an efficient implementation detail of the
  /// InlineAdvisor. Otherwise, it is possible the memory allocator
  /// re-allocate Function objects at the same address of a deleted Function;
  /// and Functions are potentially created during the function passes called
  /// after each SCC inlining (e.g. argument promotion does that).
  void freeDeletedFunctions();

bool isFunctionDeleted(const Function *F) const {
    return DeletedFunctions.count(F);
  }

private:
  friend class InlineAdvice;
  void markFunctionAsDeleted(Function *F);
  std::unordered_set<const Function *> DeletedFunctions;
};

/// The default (manual heuristics) implementation of the InlineAdvisor. This
/// implementation does not need to keep state between inliner pass runs, and is
/// reusable as-is for inliner pass test scenarios, as well as for regular use.
class DefaultInlineAdvisor : public InlineAdvisor {
public:
  DefaultInlineAdvisor(FunctionAnalysisManager &FAM, InlineParams Params)
      : InlineAdvisor(FAM), Params(Params) {}

private:
  std::unique_ptr<InlineAdvice> getAdvice(CallBase &CB) override;

void onPassExit() override { freeDeletedFunctions(); }

InlineParams Params;
};

/// The InlineAdvisorAnalysis is a module pass because the InlineAdvisor
/// needs to capture state right before inlining commences over a module.
class InlineAdvisorAnalysis : public AnalysisInfoMixin<InlineAdvisorAnalysis> {
public:
  static AnalysisKey Key;
  InlineAdvisorAnalysis() = default;
  struct Result {
    Result(Module &M, ModuleAnalysisManager &MAM) : M(M), MAM(MAM) {}
    bool invalidate(Module &, const PreservedAnalyses &,
                    ModuleAnalysisManager::Invalidator &) {
      // InlineAdvisor must be preserved across analysis invalidations.
      return false;
    }
    bool tryCreate(InlineParams Params, InliningAdvisorMode Mode);
    InlineAdvisor *getAdvisor() const { return Advisor.get(); }
    void clear() { Advisor.reset(); }

private:
    Module &M;
    ModuleAnalysisManager &MAM;
    std::unique_ptr<InlineAdvisor> Advisor;
  };

Result run(Module &M, ModuleAnalysisManager &MAM) { return Result(M, MAM); }
};

#ifdef LLVM_HAVE_TF_AOT
std::unique_ptr<InlineAdvisor>
getReleaseModeAdvisor(Module &M, ModuleAnalysisManager &MAM);
#endif

// Default (manual policy) decision making helper APIs. Shared with the legacy
// pass manager inliner.

/// Return the cost only if the inliner should attempt to inline at the given
/// CallSite. If we return the cost, we will emit an optimisation remark later
/// using that cost, so we won't do so from this function. Return None if
/// inlining should not be attempted.
Optional<InlineCost>
shouldInline(CallBase &CB, function_ref<InlineCost(CallBase &CB)> GetInlineCost,
             OptimizationRemarkEmitter &ORE, bool EnableDeferral = true);

/// Emit ORE message.
void emitInlinedInto(OptimizationRemarkEmitter &ORE, DebugLoc DLoc,
                     const BasicBlock *Block, const Function &Callee,
                     const Function &Caller, const InlineCost &IC,
                     bool ForProfileContext = false,
                     const char *PassName = nullptr);

/// Add location info to ORE message.
void addLocationToRemarks(OptimizationRemark &Remark, DebugLoc DLoc);

/// Set the inline-remark attribute.
void setInlineRemark(CallBase &CB, StringRef Message);

/// Utility for extracting the inline cost message to a string.
std::string inlineCostStr(const InlineCost &IC);
} // namespace llvm
#endif // LLVM_INLINEADVISOR_H_

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