ExpandMemCmp.cpp File Reference

#include "llvm/CodeGen/ExpandMemCmp.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/DomTreeUpdater.h"
#include "llvm/Analysis/LazyBlockFrequencyInfo.h"
#include "llvm/Analysis/ProfileSummaryInfo.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/InitializePasses.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Transforms/Utils/SizeOpts.h"
#include <optional>

Go to the source code of this file.

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.

Macros
#define	DEBUG_TYPE   "expand-memcmp"

Functions
	STATISTIC (NumMemCmpCalls, "Number of memcmp calls")
	STATISTIC (NumMemCmpNotConstant, "Number of memcmp calls without constant size")
	STATISTIC (NumMemCmpGreaterThanMax, "Number of memcmp calls with size greater than max size")
	STATISTIC (NumMemCmpInlined, "Number of inlined memcmp calls")
	INITIALIZE_PASS_BEGIN (ExpandMemCmpLegacyPass, DEBUG_TYPE, "Expand memcmp() to load/stores", false, false) INITIALIZE_PASS_END(ExpandMemCmpLegacyPass
Expand	memcmp () to load/stores"

Variables
static cl::opt< unsigned >	MemCmpEqZeroNumLoadsPerBlock ("memcmp-num-loads-per-block", cl::Hidden, cl::init(1), cl::desc("The number of loads per basic block for inline expansion of " "memcmp that is only being compared against zero."))
static cl::opt< unsigned >	MaxLoadsPerMemcmp ("max-loads-per-memcmp", cl::Hidden, cl::desc("Set maximum number of loads used in expanded memcmp"))
static cl::opt< unsigned >	MaxLoadsPerMemcmpOptSize ("max-loads-per-memcmp-opt-size", cl::Hidden, cl::desc("Set maximum number of loads used in expanded memcmp for -Os/Oz"))
	DEBUG_TYPE
Expand	false

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "expand-memcmp"

Definition at line 42 of file ExpandMemCmp.cpp.

Function Documentation

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	ExpandMemCmpLegacyPass	,
		DEBUG_TYPE	,
		"Expand memcmp() to load/stores"	,
		false	,
		false	)

References DEBUG_TYPE, and INITIALIZE_PASS_DEPENDENCY.

memcmp()

Expand memcmp

(

)

STATISTIC() [1/4]

STATISTIC	(	NumMemCmpCalls	,
		"Number of memcmp calls"	)

STATISTIC() [2/4]

STATISTIC	(	NumMemCmpGreaterThanMax	,
		"Number of memcmp calls with size greater than max size"	)

STATISTIC() [3/4]

STATISTIC	(	NumMemCmpInlined	,
		"Number of inlined memcmp calls"	)

STATISTIC() [4/4]

STATISTIC	(	NumMemCmpNotConstant	,
		"Number of memcmp calls without constant size"	)

Variable Documentation

DEBUG_TYPE

DEBUG_TYPE

Definition at line 1019 of file ExpandMemCmp.cpp.

false

Expand false

Definition at line 1020 of file ExpandMemCmp.cpp.

MaxLoadsPerMemcmp

cl::opt< unsigned > MaxLoadsPerMemcmp("max-loads-per-memcmp", cl::Hidden, cl::desc("Set maximum number of loads used in expanded memcmp")) ( "max-loads-per-memcmp" , cl::Hidden , cl::desc("Set maximum number of loads used in expanded memcmp")  )

static

MaxLoadsPerMemcmpOptSize

cl::opt< unsigned > MaxLoadsPerMemcmpOptSize("max-loads-per-memcmp-opt-size", cl::Hidden, cl::desc("Set maximum number of loads used in expanded memcmp for -Os/Oz")) ( "max-loads-per-memcmp-opt-size" , cl::Hidden , cl::desc("Set maximum number of loads used in expanded memcmp for -Os/Oz")  )

static

MemCmpEqZeroNumLoadsPerBlock

cl::opt< unsigned > MemCmpEqZeroNumLoadsPerBlock("memcmp-num-loads-per-block", cl::Hidden, cl::init(1), cl::desc("The number of loads per basic block for inline expansion of " "memcmp that is only being compared against zero.")) ( "memcmp-num-loads-per-block" , cl::Hidden , cl::init(1) , cl::desc("The number of loads per basic block for inline expansion of " "memcmp that is only being compared against zero.")  )

static