An alias analysis result set for globals. More...

#include "llvm/Analysis/GlobalsModRef.h"

Inheritance diagram for llvm::GlobalsAAResult:

Collaboration diagram for llvm::GlobalsAAResult:

Classes
class	FunctionInfo
	The mod/ref information collected for a particular function. More...

Public Member Functions
	GlobalsAAResult (GlobalsAAResult &&Arg)

	~GlobalsAAResult ()

AliasResult	alias (const MemoryLocation &LocA, const MemoryLocation &LocB, AAQueryInfo &AAQI)
	alias - If one of the pointers is to a global that we are tracking, and the other is some random pointer, we know there cannot be an alias, because the address of the global isn't taken. More...

ModRefInfo	getModRefInfo (const CallBase *Call, const MemoryLocation &Loc, AAQueryInfo &AAQI)

FunctionModRefBehavior	getModRefBehavior (const Function *F)
	getModRefBehavior - Return the behavior of the specified function if called from the specified call site. More...

FunctionModRefBehavior	getModRefBehavior (const CallBase *Call)
	getModRefBehavior - Return the behavior of the specified function if called from the specified call site. More...

Public Member Functions inherited from llvm::AAResultBase< GlobalsAAResult >
AliasResult	alias (const MemoryLocation &LocA, const MemoryLocation &LocB, AAQueryInfo &AAQI)

bool	pointsToConstantMemory (const MemoryLocation &Loc, AAQueryInfo &AAQI, bool OrLocal)

ModRefInfo	getArgModRefInfo (const CallBase *Call, unsigned ArgIdx)

FunctionModRefBehavior	getModRefBehavior (const CallBase *Call)

FunctionModRefBehavior	getModRefBehavior (const Function *F)

ModRefInfo	getModRefInfo (const CallBase *Call, const MemoryLocation &Loc, AAQueryInfo &AAQI)

ModRefInfo	getModRefInfo (const CallBase Call1, const CallBase Call2, AAQueryInfo &AAQI)

Static Public Member Functions
static GlobalsAAResult	analyzeModule (Module &M, std::function< const TargetLibraryInfo &(Function &F)> GetTLI, CallGraph &CG)

Additional Inherited Members
Protected Member Functions inherited from llvm::AAResultBase< GlobalsAAResult >
	AAResultBase ()=default

	AAResultBase (const AAResultBase &Arg)

	AAResultBase (AAResultBase &&Arg)

AAResultsProxy	getBestAAResults ()
	Get a proxy for the best AA result set to query at this time. More...

Detailed Description

An alias analysis result set for globals.

This focuses on handling aliasing properties of globals and interprocedural function call mod/ref information.

Definition at line 31 of file GlobalsModRef.h.

Constructor & Destructor Documentation

◆ GlobalsAAResult()

GlobalsAAResult::GlobalsAAResult ( GlobalsAAResult && Arg )

Definition at line 947 of file GlobalsModRef.cpp.

References Arg, assert(), and H.

◆ ~GlobalsAAResult()

GlobalsAAResult::~GlobalsAAResult ( )

Definition at line 961 of file GlobalsModRef.cpp.

Member Function Documentation

◆ alias()

AliasResult GlobalsAAResult::alias	(	const MemoryLocation &	LocA,
		const MemoryLocation &	LocB,
		AAQueryInfo &	AAQI
	)

alias - If one of the pointers is to a global that we are tracking, and the other is some random pointer, we know there cannot be an alias, because the address of the global isn't taken.

Definition at line 810 of file GlobalsModRef.cpp.

References llvm::AAResultBase< DerivedT >::alias(), llvm::all_of(), llvm::CallBase::args(), llvm::CallBase::doesNotAccessMemory(), llvm::dyn_cast(), EnableUnsafeGlobalsModRefAliasResults, llvm::GetUnderlyingObject(), llvm::GetUnderlyingObjects(), llvm::is_contained(), llvm::isIdentifiedObject(), llvm::ModRef, llvm::NoAlias, llvm::NoModRef, llvm::CallBase::onlyReadsMemory(), llvm::MemoryLocation::Ptr, and llvm::Ref.

◆ analyzeModule()

GlobalsAAResult GlobalsAAResult::analyzeModule	(	Module &	M,
		std::function< const TargetLibraryInfo &(Function &F)>	GetTLI,
		CallGraph &	CG
	)

static

Definition at line 963 of file GlobalsModRef.cpp.

References llvm::Module::getDataLayout().

Referenced by llvm::GlobalsAA::run(), and llvm::GlobalsAAWrapperPass::runOnModule().

◆ getModRefBehavior() [1/2]

FunctionModRefBehavior GlobalsAAResult::getModRefBehavior ( const Function * F )

getModRefBehavior - Return the behavior of the specified function if called from the specified call site.

The call site may be null in which case the most generic behavior of this function should be returned.

Definition at line 243 of file GlobalsModRef.cpp.

References llvm::FMRB_DoesNotAccessMemory, llvm::FMRB_OnlyReadsMemory, llvm::FMRB_UnknownModRefBehavior, llvm::AAResultBase< DerivedT >::getModRefBehavior(), llvm::isModOrRefSet(), and llvm::isModSet().

◆ getModRefBehavior() [2/2]

FunctionModRefBehavior GlobalsAAResult::getModRefBehavior ( const CallBase * Call )

getModRefBehavior - Return the behavior of the specified function if called from the specified call site.

The call site may be null in which case the most generic behavior of this function should be returned.

Definition at line 257 of file GlobalsModRef.cpp.

References assert(), C, llvm::SmallPtrSetImplBase::clear(), F(), llvm::FMRB_DoesNotAccessMemory, llvm::FMRB_OnlyReadsMemory, llvm::FMRB_UnknownModRefBehavior, llvm::CallBase::getCalledFunction(), llvm::Module::getDataLayout(), llvm::Function::getFunction(), llvm::GlobalVariable::getInitializer(), llvm::AAResultBase< DerivedT >::getModRefBehavior(), llvm::Operator::getOpcode(), llvm::GlobalValue::getParent(), llvm::Value::getType(), llvm::GetUnderlyingObject(), llvm::GlobalValue::hasLocalLinkage(), llvm::CallBase::hasOperandBundles(), I, llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::isAllocLikeFn(), llvm::isFreeCall(), llvm::isModOrRefSet(), llvm::isModSet(), llvm::Type::isPointerTy(), llvm::Mod, llvm::Ref, llvm::scc_begin(), SI, llvm::Value::users(), and llvm::Value::uses().

◆ getModRefInfo()

ModRefInfo GlobalsAAResult::getModRefInfo	(	const CallBase *	Call,
		const MemoryLocation &	Loc,
		AAQueryInfo &	AAQI
	)

Definition at line 921 of file GlobalsModRef.cpp.

References llvm::AAResultBase< GlobalsAAResult >::AAResultBase(), function, llvm::CallBase::getCalledFunction(), llvm::AAResultBase< DerivedT >::getModRefInfo(), llvm::GetUnderlyingObject(), llvm::GlobalValue::hasLocalLinkage(), llvm::intersectModRef(), llvm::isModOrRefSet(), llvm::ModRef, llvm::NoModRef, llvm::MemoryLocation::Ptr, and llvm::unionModRef().

The documentation for this class was generated from the following files:

include/llvm/Analysis/GlobalsModRef.h
lib/Analysis/GlobalsModRef.cpp

Classes

Public Member Functions

Static Public Member Functions

Additional Inherited Members