LLVM  6.0.0svn
Macros | Functions | Variables
ObjCARCContract.cpp File Reference

This file defines late ObjC ARC optimizations. More...

#include "ARCRuntimeEntryPoints.h"
#include "DependencyAnalysis.h"
#include "ObjCARC.h"
#include "ProvenanceAnalysis.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Operator.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
Include dependency graph for ObjCARCContract.cpp:

Go to the source code of this file.

Macros

#define DEBUG_TYPE   "objc-arc-contract"
 

Functions

 STATISTIC (NumPeeps, "Number of calls peephole-optimized")
 
 STATISTIC (NumStoreStrongs, "Number objc_storeStrong calls formed")
 
static StoreInstfindSafeStoreForStoreStrongContraction (LoadInst *Load, Instruction *Release, ProvenanceAnalysis &PA, AliasAnalysis *AA)
 
static InstructionfindRetainForStoreStrongContraction (Value *New, StoreInst *Store, Instruction *Release, ProvenanceAnalysis &PA)
 
 INITIALIZE_PASS_BEGIN (ObjCARCContract, "objc-arc-contract", "ObjC ARC contraction", false, false) INITIALIZE_PASS_END(ObjCARCContract
 

Variables

objc arc contract
 
objc arc ObjC ARC contraction
 
objc arc ObjC ARC false
 

Detailed Description

This file defines late ObjC ARC optimizations.

ARC stands for Automatic Reference Counting and is a system for managing reference counts for objects in Objective C.

This specific file mainly deals with ``contracting'' multiple lower level operations into singular higher level operations through pattern matching.

WARNING: This file knows about certain library functions. It recognizes them by name, and hardwires knowledge of their semantics.

WARNING: This file knows about how certain Objective-C library functions are used. Naive LLVM IR transformations which would otherwise be behavior-preserving may break these assumptions.

Definition in file ObjCARCContract.cpp.

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   "objc-arc-contract"

Definition at line 43 of file ObjCARCContract.cpp.

Function Documentation

◆ findRetainForStoreStrongContraction()

static Instruction* findRetainForStoreStrongContraction ( Value New,
StoreInst Store,
Instruction Release,
ProvenanceAnalysis PA 
)
static

Definition at line 282 of file ObjCARCContract.cpp.

References Arg, llvm::AMDGPU::HSAMD::Kernel::Key::Args, llvm::objcarc::Autorelease, llvm::objcarc::AutoreleaseRV, B, llvm::BasicBlock::back(), llvm::BasicBlock::begin(), C, llvm::Function::callsFunctionThatReturnsTwice(), llvm::objcarc::CanDecrementRefCount(), llvm::objcarc::ClaimRV, llvm::CallInst::Create(), llvm::dbgs(), DEBUG, llvm::dyn_cast(), E, llvm::SmallVectorBase::empty(), llvm::objcarc::EnableARCOpts, llvm::Instruction::eraseFromParent(), llvm::objcarc::EraseInstruction(), findSafeStoreForStoreStrongContraction(), llvm::objcarc::FusedRetainAutorelease, llvm::objcarc::FusedRetainAutoreleaseRV, llvm::InlineAsm::get(), llvm::Use::get(), llvm::FunctionType::get(), llvm::ConstantPointerNull::get(), llvm::CallInst::getArgOperand(), llvm::objcarc::GetArgRCIdentityRoot(), llvm::objcarc::GetBasicARCInstKind(), llvm::Value::getContext(), llvm::Instruction::getDebugLoc(), llvm::PHINode::getIncomingValueNumForOperand(), llvm::Type::getInt8Ty(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::Use::getOperandNo(), llvm::PHINode::getOperandNumForIncomingValue(), llvm::Instruction::getParent(), getPointerOperand(), llvm::objcarc::GetRCIdentityRoot(), llvm::BasicBlock::getSinglePredecessor(), llvm::BasicBlock::getTerminator(), getType(), llvm::Value::getType(), llvm::PointerType::getUnqual(), llvm::Use::getUser(), llvm::StoreInst::getValueOperand(), llvm::Type::getVoidTy(), I, INITIALIZE_PASS_BEGIN(), INITIALIZE_PASS_DEPENDENCY, llvm::objcarc::InitWeak, llvm::inst_begin(), llvm::inst_end(), llvm::objcarc::IntrinsicUser, llvm::objcarc::IsNoopInstruction(), llvm::objcarc::IsNullOrUndef(), llvm::Function::isVarArg(), LLVM_FALLTHROUGH, llvm::SPII::Load, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), llvm::objcarc::Release, llvm::Value::replaceAllUsesWith(), llvm::objcarc::Retain, llvm::objcarc::RetainRV, llvm::Use::set(), llvm::Instruction::setDebugLoc(), llvm::CallInst::setDoesNotThrow(), llvm::SPII::Store, llvm::objcarc::StoreStrong, llvm::Value::use_begin(), llvm::Value::use_end(), llvm::objcarc::User, and llvm::Value::users().

◆ findSafeStoreForStoreStrongContraction()

static StoreInst* findSafeStoreForStoreStrongContraction ( LoadInst Load,
Instruction Release,
ProvenanceAnalysis PA,
AliasAnalysis AA 
)
static

◆ INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN ( ObjCARCContract  ,
"objc-arc-contract ,
"ObjC ARC contraction ,
false  ,
false   
)

◆ STATISTIC() [1/2]

STATISTIC ( NumPeeps  ,
"Number of calls peephole-optimized"   
)

◆ STATISTIC() [2/2]

STATISTIC ( NumStoreStrongs  ,
"Number objc_storeStrong calls formed"   
)

Variable Documentation

◆ contract

objc arc contract

Definition at line 663 of file ObjCARCContract.cpp.

Referenced by llvm::LLLexer::LLLexer().

◆ contraction

objc arc ObjC ARC contraction

Definition at line 663 of file ObjCARCContract.cpp.

◆ false

objc arc ObjC ARC false

Definition at line 663 of file ObjCARCContract.cpp.