LLVM  13.0.0git
Macros | Functions | Variables
ModuleSummaryAnalysis.cpp File Reference
#include "llvm/Analysis/ModuleSummaryAnalysis.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Analysis/BlockFrequencyInfo.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/IndirectCallPromotionAnalysis.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/Analysis/StackSafetyAnalysis.h"
#include "llvm/Analysis/TypeMetadataUtils.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ModuleSummaryIndex.h"
#include "llvm/IR/Use.h"
#include "llvm/IR/User.h"
#include "llvm/InitializePasses.h"
#include "llvm/Object/ModuleSymbolTable.h"
#include "llvm/Object/SymbolicFile.h"
#include "llvm/Pass.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <vector>
Include dependency graph for ModuleSummaryAnalysis.cpp:

Go to the source code of this file.

Macros

#define DEBUG_TYPE   "module-summary-analysis"
 

Functions

static bool findRefEdges (ModuleSummaryIndex &Index, const User *CurUser, SetVector< ValueInfo > &RefEdges, SmallPtrSet< const User *, 8 > &Visited)
 
static CalleeInfo::HotnessType getHotness (uint64_t ProfileCount, ProfileSummaryInfo *PSI)
 
static bool isNonRenamableLocal (const GlobalValue &GV)
 
static void addVCallToSet (DevirtCallSite Call, GlobalValue::GUID Guid, SetVector< FunctionSummary::VFuncId > &VCalls, SetVector< FunctionSummary::ConstVCall > &ConstVCalls)
 Determine whether this call has all constant integer arguments (excluding "this") and summarize it to VCalls or ConstVCalls as appropriate. More...
 
static void addIntrinsicToSummary (const CallInst *CI, SetVector< GlobalValue::GUID > &TypeTests, SetVector< FunctionSummary::VFuncId > &TypeTestAssumeVCalls, SetVector< FunctionSummary::VFuncId > &TypeCheckedLoadVCalls, SetVector< FunctionSummary::ConstVCall > &TypeTestAssumeConstVCalls, SetVector< FunctionSummary::ConstVCall > &TypeCheckedLoadConstVCalls, DominatorTree &DT)
 If this intrinsic call requires that we add information to the function summary, do so via the non-constant reference arguments. More...
 
static bool isNonVolatileLoad (const Instruction *I)
 
static bool isNonVolatileStore (const Instruction *I)
 
static void computeFunctionSummary (ModuleSummaryIndex &Index, const Module &M, const Function &F, BlockFrequencyInfo *BFI, ProfileSummaryInfo *PSI, DominatorTree &DT, bool HasLocalsInUsedOrAsm, DenseSet< GlobalValue::GUID > &CantBePromoted, bool IsThinLTO, std::function< const StackSafetyInfo *(const Function &F)> GetSSICallback)
 
static void findFuncPointers (const Constant *I, uint64_t StartingOffset, const Module &M, ModuleSummaryIndex &Index, VTableFuncList &VTableFuncs)
 Find function pointers referenced within the given vtable initializer (or subset of an initializer) I. More...
 
static void computeVTableFuncs (ModuleSummaryIndex &Index, const GlobalVariable &V, const Module &M, VTableFuncList &VTableFuncs)
 
static void recordTypeIdCompatibleVtableReferences (ModuleSummaryIndex &Index, const GlobalVariable &V, SmallVectorImpl< MDNode * > &Types)
 Record vtable definition V for each type metadata it references. More...
 
static void computeVariableSummary (ModuleSummaryIndex &Index, const GlobalVariable &V, DenseSet< GlobalValue::GUID > &CantBePromoted, const Module &M, SmallVectorImpl< MDNode * > &Types)
 
static void computeAliasSummary (ModuleSummaryIndex &Index, const GlobalAlias &A, DenseSet< GlobalValue::GUID > &CantBePromoted)
 
static void setLiveRoot (ModuleSummaryIndex &Index, StringRef Name)
 
 INITIALIZE_PASS_BEGIN (ModuleSummaryIndexWrapperPass, "module-summary-analysis", "Module Summary Analysis", false, true) INITIALIZE_PASS_END(ModuleSummaryIndexWrapperPass
 

Variables

FunctionSummary::ForceSummaryHotnessType ForceSummaryEdgesCold
 
cl::opt< FunctionSummary::ForceSummaryHotnessType, true > FSEC ("force-summary-edges-cold", cl::Hidden, cl::location(ForceSummaryEdgesCold), cl::desc("Force all edges in the function summary to cold"), cl::values(clEnumValN(FunctionSummary::FSHT_None, "none", "None."), clEnumValN(FunctionSummary::FSHT_AllNonCritical, "all-non-critical", "All non-critical edges."), clEnumValN(FunctionSummary::FSHT_All, "all", "All edges.")))
 
cl::opt< std::string > ModuleSummaryDotFile ("module-summary-dot-file", cl::init(""), cl::Hidden, cl::value_desc("filename"), cl::desc("File to emit dot graph of new summary into."))
 
module summary analysis
 
module summary Module Summary Analysis
 
module summary Module Summary false
 

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   "module-summary-analysis"

Definition at line 61 of file ModuleSummaryAnalysis.cpp.

Function Documentation

◆ addIntrinsicToSummary()

static void addIntrinsicToSummary ( const CallInst *  CI,
SetVector< GlobalValue::GUID > &  TypeTests,
SetVector< FunctionSummary::VFuncId > &  TypeTestAssumeVCalls,
SetVector< FunctionSummary::VFuncId > &  TypeCheckedLoadVCalls,
SetVector< FunctionSummary::ConstVCall > &  TypeTestAssumeConstVCalls,
SetVector< FunctionSummary::ConstVCall > &  TypeCheckedLoadConstVCalls,
DominatorTree &  DT 
)
static

If this intrinsic call requires that we add information to the function summary, do so via the non-constant reference arguments.

Definition at line 160 of file ModuleSummaryAnalysis.cpp.

References addVCallToSet(), llvm::any_of(), llvm::findDevirtualizableCallsForTypeCheckedLoad(), llvm::findDevirtualizableCallsForTypeTest(), llvm::CallBase::getArgOperand(), llvm::CallBase::getCalledFunction(), llvm::GlobalValue::getGUID(), llvm::Function::getIntrinsicID(), llvm::SetVector< T, Vector, Set >::insert(), and llvm::Value::uses().

Referenced by computeFunctionSummary().

◆ addVCallToSet()

static void addVCallToSet ( DevirtCallSite  Call,
GlobalValue::GUID  Guid,
SetVector< FunctionSummary::VFuncId > &  VCalls,
SetVector< FunctionSummary::ConstVCall > &  ConstVCalls 
)
static

Determine whether this call has all constant integer arguments (excluding "this") and summarize it to VCalls or ConstVCalls as appropriate.

Definition at line 142 of file ModuleSummaryAnalysis.cpp.

References Arg, llvm::AMDGPU::HSAMD::Kernel::Key::Args, llvm::drop_begin(), llvm::SetVector< T, Vector, Set >::insert(), and move.

Referenced by addIntrinsicToSummary().

◆ computeAliasSummary()

static void computeAliasSummary ( ModuleSummaryIndex &  Index,
const GlobalAlias &  A,
DenseSet< GlobalValue::GUID > &  CantBePromoted 
)
static

Definition at line 617 of file ModuleSummaryAnalysis.cpp.

References assert(), Index, llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), isNonRenamableLocal(), and move.

Referenced by llvm::buildModuleSummaryIndex().

◆ computeFunctionSummary()

static void computeFunctionSummary ( ModuleSummaryIndex &  Index,
const Module &  M,
const Function &  F,
BlockFrequencyInfo *  BFI,
ProfileSummaryInfo *  PSI,
DominatorTree &  DT,
bool  HasLocalsInUsedOrAsm,
DenseSet< GlobalValue::GUID > &  CantBePromoted,
bool  IsThinLTO,
std::function< const StackSafetyInfo *(const Function &F)>  GetSSICallback 
)
static

Definition at line 237 of file ModuleSummaryAnalysis.cpp.

References addIntrinsicToSummary(), assert(), BB, llvm::AMDGPUISD::BFI, Callee, llvm::CalleeInfo::Cold, llvm::CalleeInfo::Critical, F, findRefEdges(), ForceSummaryEdgesCold, llvm::FunctionSummary::FSHT_All, llvm::FunctionSummary::FSHT_None, getHotness(), llvm::ProfileSummaryInfo::getProfileCount(), llvm::ICallPromotionAnalysis::getPromotionCandidatesForInstruction(), I, Index, llvm::SetVector< T, Vector, Set >::insert(), llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), llvm::SmallPtrSetImpl< PtrType >::insert(), isNonRenamableLocal(), isNonVolatileLoad(), isNonVolatileStore(), move, llvm::orc::ReadOnly, llvm::SetVector< T, Vector, Set >::remove(), llvm::SetVector< T, Vector, Set >::size(), llvm::MapVector< KeyT, ValueT, MapType, VectorType >::takeVector(), llvm::SetVector< T, Vector, Set >::takeVector(), llvm::CalleeInfo::Unknown, and VI.

Referenced by llvm::buildModuleSummaryIndex().

◆ computeVariableSummary()

static void computeVariableSummary ( ModuleSummaryIndex &  Index,
const GlobalVariable &  V,
DenseSet< GlobalValue::GUID > &  CantBePromoted,
const Module &  M,
SmallVectorImpl< MDNode * > &  Types 
)
static

Definition at line 568 of file ModuleSummaryAnalysis.cpp.

References llvm::SmallVectorImpl< T >::clear(), computeVTableFuncs(), findRefEdges(), llvm::GlobalValue::getGUID(), llvm::GlobalValue::getLinkage(), llvm::GlobalObject::getMetadata(), llvm::GlobalObject::getVCallVisibility(), llvm::GlobalValue::getVisibility(), llvm::GlobalValue::hasAppendingLinkage(), llvm::GlobalValue::hasAvailableExternallyLinkage(), llvm::GlobalObject::hasComdat(), llvm::GlobalValue::hasDLLExportStorageClass(), llvm::GlobalValue::hasGlobalUnnamedAddr(), llvm::GlobalValue::hasLinkOnceODRLinkage(), Index, llvm::detail::DenseSetImpl< ValueT, MapTy, ValueInfoT >::insert(), llvm::GlobalVariable::isConstant(), llvm::GlobalValue::isDSOLocal(), llvm::GlobalValue::isInterposable(), isNonRenamableLocal(), M, move, recordTypeIdCompatibleVtableReferences(), and llvm::SetVector< T, Vector, Set >::takeVector().

Referenced by llvm::buildModuleSummaryIndex().

◆ computeVTableFuncs()

static void computeVTableFuncs ( ModuleSummaryIndex &  Index,
const GlobalVariable &  V,
const Module &  M,
VTableFuncList &  VTableFuncs 
)
static

Definition at line 527 of file ModuleSummaryAnalysis.cpp.

References assert(), findFuncPointers(), llvm::GlobalVariable::getInitializer(), Index, llvm::GlobalVariable::isConstant(), M, and P.

Referenced by computeVariableSummary().

◆ findFuncPointers()

static void findFuncPointers ( const Constant *  I,
uint64_t  StartingOffset,
const Module &  M,
ModuleSummaryIndex &  Index,
VTableFuncList &  VTableFuncs 
)
static

Find function pointers referenced within the given vtable initializer (or subset of an initializer) I.

The starting offset of I within the vtable initializer is StartingOffset. Any discovered function pointers are added to VTableFuncs along with their cumulative offset within the initializer.

Definition at line 488 of file ModuleSummaryAnalysis.cpp.

References assert(), DL, llvm::numbers::e, llvm::StructType::elements(), llvm::enumerate(), llvm::StructLayout::getElementContainingOffset(), llvm::StructLayout::getElementOffset(), llvm::ArrayType::getElementType(), llvm::ArrayType::getNumElements(), i, I, Index, M, and Offset.

Referenced by computeVTableFuncs().

◆ findRefEdges()

static bool findRefEdges ( ModuleSummaryIndex &  Index,
const User *  CurUser,
SetVector< ValueInfo > &  RefEdges,
SmallPtrSet< const User *, 8 > &  Visited 
)
static

Definition at line 90 of file ModuleSummaryAnalysis.cpp.

References Index, llvm::SetVector< T, Vector, Set >::insert(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::User::operands(), and llvm::SmallVectorImpl< T >::pop_back_val().

Referenced by computeFunctionSummary(), and computeVariableSummary().

◆ getHotness()

static CalleeInfo::HotnessType getHotness ( uint64_t  ProfileCount,
ProfileSummaryInfo *  PSI 
)
static

Definition at line 125 of file ModuleSummaryAnalysis.cpp.

References llvm::CalleeInfo::Cold, llvm::CalleeInfo::Hot, llvm::ProfileSummaryInfo::isColdCount(), llvm::ProfileSummaryInfo::isHotCount(), llvm::CalleeInfo::None, and llvm::CalleeInfo::Unknown.

Referenced by computeFunctionSummary().

◆ INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN ( ModuleSummaryIndexWrapperPass  ,
"module-summary-analysis"  ,
"Module Summary Analysis"  ,
false  ,
true   
)

◆ isNonRenamableLocal()

static bool isNonRenamableLocal ( const GlobalValue &  GV)
static

Definition at line 136 of file ModuleSummaryAnalysis.cpp.

References llvm::GlobalValue::hasLocalLinkage(), and llvm::GlobalValue::hasSection().

Referenced by computeAliasSummary(), computeFunctionSummary(), and computeVariableSummary().

◆ isNonVolatileLoad()

static bool isNonVolatileLoad ( const Instruction *  I)
static

Definition at line 223 of file ModuleSummaryAnalysis.cpp.

References I.

Referenced by computeFunctionSummary().

◆ isNonVolatileStore()

static bool isNonVolatileStore ( const Instruction *  I)
static

Definition at line 230 of file ModuleSummaryAnalysis.cpp.

References I, and SI.

Referenced by computeFunctionSummary().

◆ recordTypeIdCompatibleVtableReferences()

static void recordTypeIdCompatibleVtableReferences ( ModuleSummaryIndex &  Index,
const GlobalVariable &  V,
SmallVectorImpl< MDNode * > &  Types 
)
static

Record vtable definition V for each type metadata it references.

Definition at line 551 of file ModuleSummaryAnalysis.cpp.

References Index, and Offset.

Referenced by computeVariableSummary().

◆ setLiveRoot()

static void setLiveRoot ( ModuleSummaryIndex &  Index,
StringRef  Name 
)
static

Definition at line 637 of file ModuleSummaryAnalysis.cpp.

References llvm::GlobalValue::getGUID(), Index, and VI.

Referenced by llvm::buildModuleSummaryIndex().

Variable Documentation

◆ analysis

module summary analysis

Definition at line 866 of file ModuleSummaryAnalysis.cpp.

◆ Analysis

module summary Module Summary Analysis

Definition at line 867 of file ModuleSummaryAnalysis.cpp.

◆ false

module summary Module Summary false

Definition at line 867 of file ModuleSummaryAnalysis.cpp.

◆ ForceSummaryEdgesCold

FunctionSummary::ForceSummaryHotnessType ForceSummaryEdgesCold
Initial value:
=
FunctionSummary::FSHT_None

Definition at line 65 of file ModuleSummaryAnalysis.cpp.

Referenced by computeFunctionSummary().

◆ FSEC

cl::opt<FunctionSummary::ForceSummaryHotnessType, true> FSEC("force-summary-edges-cold", cl::Hidden, cl::location(ForceSummaryEdgesCold), cl::desc("Force all edges in the function summary to cold"), cl::values(clEnumValN(FunctionSummary::FSHT_None, "none", "None."), clEnumValN(FunctionSummary::FSHT_AllNonCritical, "all-non-critical", "All non-critical edges."), clEnumValN(FunctionSummary::FSHT_All, "all", "All edges.")))

◆ ModuleSummaryDotFile

cl::opt<std::string> ModuleSummaryDotFile("module-summary-dot-file", cl::init(""), cl::Hidden, cl::value_desc("filename"), cl::desc("File to emit dot graph of new summary into."))

Referenced by llvm::buildModuleSummaryIndex().

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