GVNHoist.cpp File Reference

#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/IteratedDominanceFrontier.h"
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
#include "llvm/Analysis/MemorySSA.h"
#include "llvm/Analysis/MemorySSAUpdater.h"
#include "llvm/Analysis/PostDominators.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/Argument.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/Use.h"
#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include "llvm/Pass.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/GVN.h"
#include <algorithm>
#include <cassert>
#include <iterator>
#include <memory>
#include <utility>
#include <vector>

Include dependency graph for GVNHoist.cpp:

Go to the source code of this file.

Classes
struct	llvm::CHIArg
class	llvm::InsnInfo
class	llvm::LoadInfo
class	llvm::StoreInfo
class	llvm::CallInfo
class	llvm::GVNHoist
class	llvm::GVNHoistLegacyPass

Namespaces
	llvm
	This class represents lattice values for constants.

Macros
#define	DEBUG_TYPE   "gvn-hoist"

Typedefs
using	llvm::BBSideEffectsSet = DenseMap< const BasicBlock *, bool >
using	llvm::SmallVecInsn = SmallVector< Instruction *, 4 >
using	llvm::SmallVecImplInsn = SmallVectorImpl< Instruction * >
using	llvm::HoistingPointInfo = std::pair< BasicBlock *, SmallVecInsn >
using	llvm::HoistingPointList = SmallVector< HoistingPointInfo, 4 >
using	llvm::VNType = std::pair< unsigned, unsigned >
using	llvm::VNtoInsns = DenseMap< VNType, SmallVector< Instruction *, 4 > >
using	llvm::CHIIt = SmallVectorImpl< CHIArg >::iterator
using	llvm::CHIArgs = iterator_range< CHIIt >
using	llvm::OutValuesType = DenseMap< BasicBlock *, SmallVector< CHIArg, 2 > >
using	llvm::InValuesType = DenseMap< BasicBlock *, SmallVector< std::pair< VNType, Instruction * >, 2 > >

Enumerations
enum	: unsigned { llvm::InvalidVN = ~2U }

Functions
	STATISTIC (NumHoisted, "Number of instructions hoisted")
	STATISTIC (NumRemoved, "Number of instructions removed")
	STATISTIC (NumLoadsHoisted, "Number of loads hoisted")
	STATISTIC (NumLoadsRemoved, "Number of loads removed")
	STATISTIC (NumStoresHoisted, "Number of stores hoisted")
	STATISTIC (NumStoresRemoved, "Number of stores removed")
	STATISTIC (NumCallsHoisted, "Number of calls hoisted")
	STATISTIC (NumCallsRemoved, "Number of calls removed")
static void	llvm::combineKnownMetadata (Instruction *ReplInst, Instruction *I)
	INITIALIZE_PASS_BEGIN (GVNHoistLegacyPass, "gvn-hoist", "Early GVN Hoisting of Expressions", false, false) INITIALIZE_PASS_END(GVNHoistLegacyPass

Variables
static cl::opt< int >	MaxHoistedThreshold ("gvn-max-hoisted", cl::Hidden, cl::init(-1), cl::desc("Max number of instructions to hoist " "(default unlimited = -1)"))
static cl::opt< int >	MaxNumberOfBBSInPath ("gvn-hoist-max-bbs", cl::Hidden, cl::init(4), cl::desc("Max number of basic blocks on the path between " "hoisting locations (default = 4, unlimited = -1)"))
static cl::opt< int >	MaxDepthInBB ("gvn-hoist-max-depth", cl::Hidden, cl::init(100), cl::desc("Hoist instructions from the beginning of the BB up to the " "maximum specified depth (default = 100, unlimited = -1)"))
static cl::opt< int >	MaxChainLength ("gvn-hoist-max-chain-length", cl::Hidden, cl::init(10), cl::desc("Maximum length of dependent chains to hoist " "(default = 10, unlimited = -1)"))
gvn	hoist
	When an instruction is found to only use loop invariant operands that is safe to hoist, this instruction is called to do the dirty work. More...
gvn Early GVN Hoisting of	Expressions
gvn Early GVN Hoisting of	false

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "gvn-hoist"

Definition at line 84 of file GVNHoist.cpp.

Function Documentation

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	GVNHoistLegacyPass	,
		"gvn-hoist"	,
		"Early GVN Hoisting of Expressions"	,
		false	,
		false
	)

Referenced by llvm::GVNHoistPass::run().

STATISTIC() [1/8]

STATISTIC	(	NumHoisted	,
		"Number of instructions hoisted"
	)

STATISTIC() [2/8]

STATISTIC	(	NumRemoved	,
		"Number of instructions removed"
	)

STATISTIC() [3/8]

STATISTIC	(	NumLoadsHoisted	,
		"Number of loads hoisted"
	)

STATISTIC() [4/8]

STATISTIC	(	NumLoadsRemoved	,
		"Number of loads removed"
	)

STATISTIC() [5/8]

STATISTIC	(	NumStoresHoisted	,
		"Number of stores hoisted"
	)

STATISTIC() [6/8]

STATISTIC	(	NumStoresRemoved	,
		"Number of stores removed"
	)

STATISTIC() [7/8]

STATISTIC	(	NumCallsHoisted	,
		"Number of calls hoisted"
	)

STATISTIC() [8/8]

STATISTIC	(	NumCallsRemoved	,
		"Number of calls removed"
	)

Variable Documentation

Expressions

gvn Early GVN Hoisting of Expressions

Definition at line 1203 of file GVNHoist.cpp.

Referenced by llvm::GVN::ValueTable::clear(), llvm::coverage::CounterExpressionBuilder::getExpressions(), patchAndReplaceAllUsesWith(), llvm::GVN::ValueTable::phiTranslate(), llvm::coverage::BinaryCoverageReader::readNextRecord(), llvm::coverage::CoverageFilenamesSectionWriter::write(), and llvm::coverage::CoverageMappingWriter::write().

false

gvn Early GVN Hoisting of false

Definition at line 1203 of file GVNHoist.cpp.

hoist

static void hoist

When an instruction is found to only use loop invariant operands that is safe to hoist, this instruction is called to do the dirty work.

Definition at line 1203 of file GVNHoist.cpp.

MaxChainLength

cl::opt<int> MaxChainLength("gvn-hoist-max-chain-length", cl::Hidden, cl::init(10), cl::desc("Maximum length of dependent chains to hoist " "(default = 10, unlimited = -1)"))

static

Referenced by llvm::GVNHoist::run().

MaxDepthInBB

cl::opt<int> MaxDepthInBB("gvn-hoist-max-depth", cl::Hidden, cl::init(100), cl::desc("Hoist instructions from the beginning of the BB up to the " "maximum specified depth (default = 100, unlimited = -1)"))

static

MaxHoistedThreshold

cl::opt<int> MaxHoistedThreshold("gvn-max-hoisted", cl::Hidden, cl::init(-1), cl::desc("Max number of instructions to hoist " "(default unlimited = -1)"))

static

MaxNumberOfBBSInPath

cl::opt<int> MaxNumberOfBBSInPath("gvn-hoist-max-bbs", cl::Hidden, cl::init(4), cl::desc("Max number of basic blocks on the path between " "hoisting locations (default = 4, unlimited = -1)"))

static

Referenced by llvm::GVNHoist::rank().