AArch64PostSelectOptimize.cpp File Reference

#include "AArch64.h"
#include "AArch64TargetMachine.h"
#include "MCTargetDesc/AArch64MCTargetDesc.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/GlobalISel/Utils.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"

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   "aarch64-post-select-optimize"

Functions
unsigned	getNonFlagSettingVariant (unsigned Opc)
bool	foldSimpleCrossClassCopies (MachineInstr &MI)
	Look for cross regclass copies that can be trivially eliminated.
bool	foldCopyDup (MachineInstr &MI)
bool	doPeepholeOpts (MachineBasicBlock &MBB)
bool	optimizeNZCVDefs (MachineBasicBlock &MBB)
bool	runAArch64PostSelectOptimize (MachineFunction &MF)
	INITIALIZE_PASS_BEGIN (AArch64PostSelectOptimizeLegacy, DEBUG_TYPE, "Optimize AArch64 selected instructions", false, false) INITIALIZE_PASS_END(AArch64PostSelectOptimizeLegacy
FunctionPass *	llvm::createAArch64PostSelectOptimize ()

Variables
	DEBUG_TYPE
Optimize AArch64 selected	instructions
Optimize AArch64 selected	false

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "aarch64-post-select-optimize"

Definition at line 26 of file AArch64PostSelectOptimize.cpp.

Function Documentation

doPeepholeOpts()

bool doPeepholeOpts

(

MachineBasicBlock &

MBB

)

Definition at line 205 of file AArch64PostSelectOptimize.cpp.

References Changed, foldCopyDup(), foldSimpleCrossClassCopies(), llvm::make_early_inc_range(), MBB, and MI.

Referenced by runAArch64PostSelectOptimize().

foldCopyDup()

bool foldCopyDup

(

MachineInstr &

MI

)

Definition at line 143 of file AArch64PostSelectOptimize.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineInstr::eraseFromParent(), llvm::MachineOperand::getImm(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::Register::isPhysical(), MI, and TII.

Referenced by doPeepholeOpts().

foldSimpleCrossClassCopies()

bool foldSimpleCrossClassCopies

(

MachineInstr &

MI

)

Look for cross regclass copies that can be trivially eliminated.

Definition at line 95 of file AArch64PostSelectOptimize.cpp.

References llvm::TargetRegisterClass::hasSubClass(), and MI.

Referenced by doPeepholeOpts().

getNonFlagSettingVariant()

unsigned getNonFlagSettingVariant

(

unsigned

Opc

)

Definition at line 55 of file AArch64PostSelectOptimize.cpp.

References Opc.

Referenced by optimizeNZCVDefs().

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	AArch64PostSelectOptimizeLegacy	,
		DEBUG_TYPE	,
		"Optimize AArch64 selected instructions"	,
		false	,
		false	)

References DEBUG_TYPE.

optimizeNZCVDefs()

bool optimizeNZCVDefs

(

MachineBasicBlock &

MBB

)

Definition at line 216 of file AArch64PostSelectOptimize.cpp.

References llvm::LiveRegUnits::addLiveOuts(), llvm::LiveRegUnits::available(), Changed, llvm::constrainOperandRegClass(), llvm::dbgs(), getNonFlagSettingVariant(), II, llvm::instructionsWithoutDebug(), LLVM_DEBUG, MBB, llvm::LiveRegUnits::stepBackward(), TII, and TRI.

Referenced by runAArch64PostSelectOptimize().

runAArch64PostSelectOptimize()

bool runAArch64PostSelectOptimize

(

MachineFunction &

MF

)

Definition at line 288 of file AArch64PostSelectOptimize.cpp.

References assert(), Changed, doPeepholeOpts(), llvm::MachineFunction::getProperties(), and optimizeNZCVDefs().

Referenced by llvm::AArch64PostSelectOptimizePass::run().

Variable Documentation

DEBUG_TYPE

DEBUG_TYPE

Definition at line 309 of file AArch64PostSelectOptimize.cpp.

false

Optimize AArch64 selected false

Definition at line 310 of file AArch64PostSelectOptimize.cpp.

instructions

Optimize AArch64 selected instructions

Definition at line 310 of file AArch64PostSelectOptimize.cpp.