AArch64ConditionalCompares.cpp File Reference

#include "AArch64.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/MachineTraceMetrics.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "aarch64-ccmp"

Functions
	STATISTIC (NumConsidered, "Number of ccmps considered")
	STATISTIC (NumPhiRejs, "Number of ccmps rejected (PHI)")
	STATISTIC (NumPhysRejs, "Number of ccmps rejected (Physregs)")
	STATISTIC (NumPhi2Rejs, "Number of ccmps rejected (PHI2)")
	STATISTIC (NumHeadBranchRejs, "Number of ccmps rejected (Head branch)")
	STATISTIC (NumCmpBranchRejs, "Number of ccmps rejected (CmpBB branch)")
	STATISTIC (NumCmpTermRejs, "Number of ccmps rejected (CmpBB is cbz...)")
	STATISTIC (NumImmRangeRejs, "Number of ccmps rejected (Imm out of range)")
	STATISTIC (NumLiveDstRejs, "Number of ccmps rejected (Cmp dest live)")
	STATISTIC (NumMultNZCVUses, "Number of ccmps rejected (NZCV used)")
	STATISTIC (NumUnknNZCVDefs, "Number of ccmps rejected (NZCV def unknown)")
	STATISTIC (NumSpeculateRejs, "Number of ccmps rejected (Can't speculate)")
	STATISTIC (NumConverted, "Number of ccmp instructions created")
	STATISTIC (NumCompBranches, "Number of cbz/cbnz branches converted")
static bool	parseCond (ArrayRef< MachineOperand > Cond, AArch64CC::CondCode &CC)
	INITIALIZE_PASS_BEGIN (AArch64ConditionalCompares, "aarch64-ccmp", "AArch64 CCMP Pass", false, false) INITIALIZE_PASS_END(AArch64ConditionalCompares

Variables
static cl::opt< unsigned >	BlockInstrLimit ("aarch64-ccmp-limit", cl::init(30), cl::Hidden, cl::desc("Maximum number of instructions per speculated block."))
static cl::opt< bool >	Stress ("aarch64-stress-ccmp", cl::Hidden, cl::desc("Turn all knobs to 11"))
aarch64	ccmp
aarch64 AArch64 CCMP	Pass
aarch64 AArch64 CCMP	false

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "aarch64-ccmp"

Definition at line 41 of file AArch64ConditionalCompares.cpp.

Function Documentation

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	AArch64ConditionalCompares	,
		"aarch64-ccmp"	,
		"AArch64 CCMP Pass"	,
		false	,
		false	)

References INITIALIZE_PASS_DEPENDENCY.

parseCond()

bool parseCond ( ArrayRef< MachineOperand > Cond, AArch64CC::CondCode & CC )

static

Definition at line 271 of file AArch64ConditionalCompares.cpp.

References assert(), Cond, llvm::AArch64CC::EQ, llvm::getImm(), and llvm::AArch64CC::NE.

STATISTIC() [1/14]

STATISTIC	(	NumCmpBranchRejs	,
		"Number of ccmps rejected (CmpBB branch)"	)

STATISTIC() [2/14]

STATISTIC	(	NumCmpTermRejs	,
		"Number of ccmps rejected (CmpBB is cbz...)"	)

STATISTIC() [3/14]

STATISTIC	(	NumCompBranches	,
		"Number of cbz/cbnz branches converted"	)

References MBB, MRI, llvm::CallingConv::Tail, TII, and TRI.

STATISTIC() [4/14]

STATISTIC	(	NumConsidered	,
		"Number of ccmps considered"	)

STATISTIC() [5/14]

STATISTIC	(	NumConverted	,
		"Number of ccmp instructions created"	)

STATISTIC() [6/14]

STATISTIC	(	NumHeadBranchRejs	,
		"Number of ccmps rejected (Head branch)"	)

STATISTIC() [7/14]

STATISTIC	(	NumImmRangeRejs	,
		"Number of ccmps rejected (Imm out of range)"	)

STATISTIC() [8/14]

STATISTIC	(	NumLiveDstRejs	,
		"Number of ccmps rejected (Cmp dest live)"	)

STATISTIC() [9/14]

STATISTIC	(	NumMultNZCVUses	,
		"Number of ccmps rejected (NZCV used)"	)

STATISTIC() [10/14]

STATISTIC	(	NumPhi2Rejs	,
		"Number of ccmps rejected (PHI2)"	)

STATISTIC() [11/14]

STATISTIC	(	NumPhiRejs	,
		"Number of ccmps rejected (PHI)"	)

STATISTIC() [12/14]

STATISTIC	(	NumPhysRejs	,
		"Number of ccmps rejected (Physregs)"	)

STATISTIC() [13/14]

STATISTIC	(	NumSpeculateRejs	,
		"Number of ccmps rejected (Can't speculate)"	)

STATISTIC() [14/14]

STATISTIC	(	NumUnknNZCVDefs	,
		"Number of ccmps rejected (NZCV def unknown)"	)

Variable Documentation

BlockInstrLimit

cl::opt< unsigned > BlockInstrLimit("aarch64-ccmp-limit", cl::init(30), cl::Hidden, cl::desc("Maximum number of instructions per speculated block.")) ( "aarch64-ccmp-limit" , cl::init(30) , cl::Hidden , cl::desc("Maximum number of instructions per speculated block.")  )

static

ccmp

aarch64 ccmp

Definition at line 797 of file AArch64ConditionalCompares.cpp.

false

aarch64 AArch64 CCMP false

Definition at line 798 of file AArch64ConditionalCompares.cpp.

Pass

aarch64 AArch64 CCMP Pass

Definition at line 798 of file AArch64ConditionalCompares.cpp.

Stress

cl::opt< bool > Stress("aarch64-stress-ccmp", cl::Hidden, cl::desc("Turn all knobs to 11")) ( "aarch64-stress-ccmp" , cl::Hidden , cl::desc("Turn all knobs to 11")  )

static