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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2023 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#pragma once
#include "common/LLVMWarningsPush.hpp"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Pass.h"
#include <llvm/IR/InstVisitor.h>
#include <llvm/ADT/StringRef.h>
#include "llvm/ADT/DenseSet.h"
#include "llvm/Support/ScaledNumber.h"
#include "common/LLVMWarningsPop.hpp"
#include <cstddef>
#include "Probe/Assertion.h"
#include <deque>
#include <unordered_map>
#include <unordered_set>
namespace llvm {
class Loop;
class LoopInfo;
}
namespace IGC {
/// \brief Estimate function size after complete inlining.
///
/// This pass visits the call graph and estimates the number of llvm IR
/// instructions after complete inlining.
class EstimateFunctionSize : public llvm::ModulePass, public llvm::InstVisitor<EstimateFunctionSize>
{
public:
static char ID;
enum AnalysisLevel {
AL_Module,
AL_Kernel
};
explicit EstimateFunctionSize(AnalysisLevel = AL_Module, bool = false);
~EstimateFunctionSize();
EstimateFunctionSize(const EstimateFunctionSize&) = delete;
EstimateFunctionSize& operator=(const EstimateFunctionSize&) = delete;
virtual llvm::StringRef getPassName() const override { return "Estimate Function Sizes"; }
void getAnalysisUsage(llvm::AnalysisUsage& AU) const override;
bool runOnModule(llvm::Module& M) override;
/// \brief Return the estimated maximal function size after complete inlining.
std::size_t getMaxExpandedSize() const;
/// \brief Return the estimated function size after complete inlining.
std::size_t getExpandedSize(const llvm::Function* F) const;
bool onlyCalledOnce(const llvm::Function* F);
bool hasRecursion() const { return HasRecursion; }
bool shouldEnableSubroutine() const { return EnableSubroutine; }
bool isTrimmedFunction( llvm::Function* F);
void visitCallInst( llvm::CallInst& CI );
bool isStackCallAssigned(llvm::Function* F);
private:
void analyze();
void checkSubroutine();
void clear();
void reduceKernelSize();
/// \brief Return the associated opaque data.
template <typename T> T* get(llvm::Function* F) {
IGC_ASSERT(ECG.count(F));
return static_cast<T*>(ECG[F]);
}
void performImplArgsAnalysis();
void initializeTopologicalVisit(llvm::Function* root, std::unordered_map<void*, uint32_t>& FunctionsInKernel, std::deque<void*>& BottomUpQueue, bool ignoreStackCallBoundary);
uint32_t updateExpandedUnitSize(llvm::Function* F, bool ignoreStackCallBoundary);
void UpdateSizeAfterCollapsing(std::deque<void*>& leafNodes, std::unordered_set<void*> &funcsInKernel);
void updateInlineCnt(llvm::Function* root);
llvm::ScaledNumber<uint64_t> calculateTotalWeight(llvm::Function* root);
uint32_t bottomUpHeuristic(llvm::Function* F, uint32_t& stackCall_cnt);
void partitionKernel();
void runStaticAnalysis();
void reduceCompilationUnitSize();
void trimCompilationUnit(llvm::SmallVector<void*, 64> &unitHeads, uint32_t threshold, bool ignoreStackCallBoundary);
void performTrimming(llvm::Function *head, llvm::SmallVector<void*, 64>& functions_to_trim, uint32_t threshold, bool ignoreStackCallBoundary);
void performGreedyTrimming(llvm::Function* head, llvm::SmallVector<void*, 64>& functions_to_trim, uint32_t threshold, bool ignoreStackCallBoundary);
uint32_t getMaxUnitSize();
void getFunctionsToTrim(llvm::Function* root, llvm::SmallVector<void*, 64> &trimming_pool, bool ignoreStackCallBoundary, uint32_t& func_cnt);
void updateStaticFuncFreq();
void estimateTotalLoopIteration(llvm::Function &F, llvm::LoopInfo *LI);
/// \brief The module being analyzed.
llvm::Module* M;
/// \brief The analysis level to be performed.
AnalysisLevel AL;
bool tmpHasImplicitArg;
bool matchImplicitArg( llvm::CallInst& CI );
const llvm::StringRef GET_LOCAL_ID_X = "__builtin_IB_get_local_id_x";
const llvm::StringRef GET_LOCAL_ID_Y = "__builtin_IB_get_local_id_y";
const llvm::StringRef GET_LOCAL_ID_Z = "__builtin_IB_get_local_id_z";
const llvm::StringRef GET_GROUP_ID = "__builtin_IB_get_group_id";
const llvm::StringRef GET_LOCAL_THREAD_ID = "__builtin_IB_get_local_thread_id";
const llvm::StringRef GET_GLOBAL_SIZE = "__builtin_IB_get_global_size";
const llvm::StringRef GET_LOCAL_SIZE = "__builtin_IB_get_local_size";
const llvm::StringRef GET_GLOBAL_OFFSET = "__builtin_IB_get_global_offset";
const llvm::StringRef GET_WORK_DIM = "__builtin_IB_get_work_dim";
const llvm::StringRef GET_NUM_GROUPS = "__builtin_IB_get_num_groups";
const llvm::StringRef GET_ENQUEUED_LOCAL_SIZE = "__builtin_IB_get_enqueued_local_size";
const llvm::StringRef GET_STAGE_IN_GRID_ORIGIN = "__builtin_IB_get_stage_in_grid_origin";
const llvm::StringRef GET_STAGE_IN_GRID_SIZE = "__builtin_IB_get_stage_in_grid_size";
const llvm::StringRef GET_SYNC_BUFFER = "__builtin_IB_get_sync_buffer";
const llvm::StringRef GET_ASSERT_BUFFER = "__builtin_IB_get_assert_buffer";
bool HasRecursion;
bool EnableSubroutine;
/// Internal data structure for the analysis which is approximately an
/// extended call graph.
llvm::SmallDenseMap<llvm::Function*, void*> ECG;
//Kernel entries
llvm::SmallVector<void*, 64> kernelEntries;
//Functions that are assigned stackcalls
llvm::SmallVector<void*, 64> stackCallFuncs;
llvm::SmallVector<void*, 64> addressTakenFuncs;
llvm::ScaledNumber<uint64_t> threshold_func_freq;
llvm::ScaledNumber<uint64_t> thresholdForTrimming;
std::unordered_map<llvm::Loop *, llvm::ScaledNumber<uint64_t>>
LoopIterCnts;
// Flags for Kernel trimming
bool ControlKernelTotalSize;
bool ControlUnitSize;
unsigned ControlInlineTinySize;
unsigned UnitSizeThreshold;
// Flags for Static Profile-guided trimming
bool StaticProfileGuidedTrimming;
bool UseFrequencyInfoForSPGT;
bool BlockFrequencySampling;
bool EnableLeafCollapsing;
bool EnableSizeContributionOptimization;
bool LoopCountAwareTrimming;
bool EnableGreedyTrimming;
unsigned SizeWeightForSPGT;
unsigned FrequencyWeightForSPGT;
unsigned MetricForKernelSizeReduction;
unsigned ParameterForColdFuncThreshold;
unsigned ControlInlineTinySizeForSPGT;
unsigned MaxUnrollCountForFunctionSizeAnalysis;
unsigned SkipTrimmingOneCopyFunction;
std::string SelectiveTrimming;
// Flags for Partitioning
bool PartitionUnit;
bool StaticProfileGuidedPartitioning;
// Flags for implcit arguments and external functions
bool ForceInlineExternalFunctions;
bool ForceInlineStackCallWithImplArg;
bool ControlInlineImplicitArgs;
unsigned SubroutineThreshold;
unsigned KernelTotalSizeThreshold;
unsigned ExpandedUnitSizeThreshold;
};
llvm::ModulePass* createEstimateFunctionSizePass();
llvm::ModulePass *createEstimateFunctionSizePass(bool);
llvm::ModulePass* createEstimateFunctionSizePass(EstimateFunctionSize::AnalysisLevel);
} // namespace IGC
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