#include "llvm/Analysis/MemoryBuiltins.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Analysis/TargetFolder.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/Utils/Local.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/Argument.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Value.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cstdint>
#include <iterator>
#include <utility>

Include dependency graph for MemoryBuiltins.cpp:

Classes
struct	AllocFnsTy

Macros
#define	DEBUG_TYPE "memory-builtins"

Enumerations
enum	AllocType : uint8_t { OpNewLike = 1<<0, MallocLike = 1<<1 \| OpNewLike, CallocLike = 1<<2, ReallocLike = 1<<3, StrDupLike = 1<<4, MallocOrCallocLike = MallocLike \| CallocLike, AllocLike = MallocLike \| CallocLike \| StrDupLike, AnyAlloc = AllocLike \| ReallocLike }

Functions
static const Function *	getCalledFunction (const Value *V, bool LookThroughBitCast, bool &IsNoBuiltin)

static Optional< AllocFnsTy >	getAllocationDataForFunction (const Function Callee, AllocType AllocTy, const TargetLibraryInfo TLI)
	Returns the allocation data for the given value if it's either a call to a known allocation function, or a call to a function with the allocsize attribute. More...

static Optional< AllocFnsTy >	getAllocationData (const Value V, AllocType AllocTy, const TargetLibraryInfo TLI, bool LookThroughBitCast=false)

static Optional< AllocFnsTy >	getAllocationSize (const Value V, const TargetLibraryInfo TLI)

static bool	hasNoAliasAttr (const Value *V, bool LookThroughBitCast)

static Value *	computeArraySize (const CallInst CI, const DataLayout &DL, const TargetLibraryInfo TLI, bool LookThroughSExt=false)

static APInt	getSizeWithOverflow (const SizeOffsetType &Data)

	STATISTIC (ObjectVisitorArgument, "Number of arguments with unsolved size and offset")

	STATISTIC (ObjectVisitorLoad, "Number of load instructions with unsolved size and offset")

Variables
static const std::pair< LibFunc, AllocFnsTy >	AllocationFnData []

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "memory-builtins"

Definition at line 50 of file MemoryBuiltins.cpp.

Enumeration Type Documentation

◆ AllocType

enum AllocType : uint8_t

Enumerator
OpNewLike
MallocLike
CallocLike
ReallocLike
StrDupLike
MallocOrCallocLike
AllocLike
AnyAlloc

Definition at line 52 of file MemoryBuiltins.cpp.

Function Documentation

◆ computeArraySize()

static Value* computeArraySize	(	const CallInst *	CI,
		const DataLayout &	DL,
		const TargetLibraryInfo *	TLI,
		bool	LookThroughSExt = `false`
	)

static

Definition at line 287 of file MemoryBuiltins.cpp.

References llvm::ComputeMultiple(), llvm::CallBase::getArgOperand(), llvm::getMallocAllocatedType(), llvm::StructLayout::getSizeInBytes(), llvm::DataLayout::getStructLayout(), llvm::DataLayout::getTypeAllocSize(), llvm::Type::isSized(), and llvm::ARM_MB::ST.

Referenced by llvm::getMallocArraySize().

◆ getAllocationData()

static Optional<AllocFnsTy> getAllocationData	(	const Value *	V,
		AllocType	AllocTy,
		const TargetLibraryInfo *	TLI,
		bool	LookThroughBitCast = `false`
	)

static

Definition at line 172 of file MemoryBuiltins.cpp.

References Callee, getAllocationDataForFunction(), getCalledFunction(), and llvm::None.

Referenced by llvm::isAllocationFn(), llvm::isAllocLikeFn(), llvm::isCallocLikeFn(), llvm::isMallocLikeFn(), llvm::isMallocOrCallocLikeFn(), and llvm::isReallocLikeFn().

◆ getAllocationDataForFunction()

static Optional<AllocFnsTy> getAllocationDataForFunction	(	const Function *	Callee,
		AllocType	AllocTy,
		const TargetLibraryInfo *	TLI
	)

static

Returns the allocation data for the given value if it's either a call to a known allocation function, or a call to a function with the allocsize attribute.

Definition at line 135 of file MemoryBuiltins.cpp.

References AllocationFnData, AllocFnsTy::AllocTy, llvm::sys::path::end(), llvm::find_if(), AllocFnsTy::FstParam, llvm::Type::getContext(), llvm::Function::getFunctionType(), llvm::Type::getInt8PtrTy(), llvm::TargetLibraryInfo::getLibFunc(), llvm::Value::getName(), llvm::FunctionType::getNumParams(), llvm::FunctionType::getParamType(), llvm::FunctionType::getReturnType(), llvm::TargetLibraryInfo::has(), llvm::Type::isIntegerTy(), llvm::None, AllocFnsTy::NumParams, P, and AllocFnsTy::SndParam.