SIOptimizeExecMasking.cpp File Reference

#include "AMDGPU.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/InitializePasses.h"

Include dependency graph for SIOptimizeExecMasking.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "si-optimize-exec-masking"

Functions
	INITIALIZE_PASS_BEGIN (SIOptimizeExecMasking, DEBUG_TYPE, "SI optimize exec mask operations", false, false) INITIALIZE_PASS_END(SIOptimizeExecMasking
static Register	isCopyFromExec (const MachineInstr &MI, const GCNSubtarget &ST)
	If MI is a copy from exec, return the register copied to. More...
static Register	isCopyToExec (const MachineInstr &MI, const GCNSubtarget &ST)
	If MI is a copy to exec, return the register copied from. More...
static Register	isLogicalOpOnExec (const MachineInstr &MI)
	If MI is a logical operation on an exec value, return the register copied to. More...
static unsigned	getSaveExecOp (unsigned Opc)
static bool	removeTerminatorBit (const SIInstrInfo &TII, MachineInstr &MI)
static MachineBasicBlock::reverse_iterator	fixTerminators (const SIInstrInfo &TII, MachineBasicBlock &MBB)
static MachineBasicBlock::reverse_iterator	findExecCopy (const SIInstrInfo &TII, const GCNSubtarget &ST, MachineBasicBlock &MBB, MachineBasicBlock::reverse_iterator I, unsigned CopyToExec)
static bool	isLiveOut (const MachineBasicBlock &MBB, unsigned Reg)
static MachineInstr *	findInstrBackwards (MachineInstr &Origin, std::function< bool(MachineInstr *)> Pred, ArrayRef< MCRegister > NonModifiableRegs, const SIRegisterInfo *TRI, unsigned MaxInstructions=20)
static bool	isRegisterInUseBetween (MachineInstr &Stop, MachineInstr &Start, MCRegister Reg, const SIRegisterInfo *TRI, MachineRegisterInfo &MRI, bool useLiveOuts=false, bool ignoreStart=false)
static bool	isRegisterInUseAfter (MachineInstr &Stop, MCRegister Reg, const SIRegisterInfo *TRI, MachineRegisterInfo &MRI)
static MachineInstr *	findPossibleVCMPVCMPXOptimization (MachineInstr &SaveExec, MCRegister Exec, const SIRegisterInfo *TRI, const SIInstrInfo *TII, MachineRegisterInfo &MRI)
static bool	optimizeVCMPSaveExecSequence (MachineInstr &SaveExecInstr, MachineInstr &VCmp, MCRegister Exec, const SIInstrInfo *TII, const SIRegisterInfo *TRI, MachineRegisterInfo &MRI)

Variables
	DEBUG_TYPE
SI optimize exec mask	operations
SI optimize exec mask	false

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "si-optimize-exec-masking"

Definition at line 18 of file SIOptimizeExecMasking.cpp.

Function Documentation

findExecCopy()

static MachineBasicBlock::reverse_iterator findExecCopy ( const SIInstrInfo &  TII, const GCNSubtarget &  ST, MachineBasicBlock &  MBB, MachineBasicBlock::reverse_iterator  I, unsigned  CopyToExec  )

static

Definition at line 266 of file SIOptimizeExecMasking.cpp.

References E, I, isCopyFromExec(), llvm::Register::isValid(), MBB, N, llvm::MachineBasicBlock::rend(), and llvm::ARM_MB::ST.

findInstrBackwards()

static MachineInstr* findInstrBackwards ( MachineInstr &  Origin, std::function< bool(MachineInstr *)>  Pred, ArrayRef< MCRegister >  NonModifiableRegs, const SIRegisterInfo *  TRI, unsigned  MaxInstructions = 20  )

static

Definition at line 302 of file SIOptimizeExecMasking.cpp.

References E, llvm::MachineInstr::getParent(), llvm::ilist_node_impl< OptionsT >::getReverseIterator(), llvm::MachineBasicBlock::rend(), and TRI.

Referenced by findPossibleVCMPVCMPXOptimization().

findPossibleVCMPVCMPXOptimization()

static MachineInstr* findPossibleVCMPVCMPXOptimization ( MachineInstr &  SaveExec, MCRegister  Exec, const SIRegisterInfo *  TRI, const SIInstrInfo *  TII, MachineRegisterInfo &  MRI  )

static

Definition at line 371 of file SIOptimizeExecMasking.cpp.

References assert(), Check, findInstrBackwards(), llvm::MachineInstr::getOperand(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::AMDGPU::getVCMPXOpFromVCMP(), isLiveOut(), llvm::MachineOperand::isReg(), isRegisterInUseAfter(), isRegisterInUseBetween(), llvm::MachineInstr::modifiesRegister(), MRI, TII, and TRI.

fixTerminators()

static MachineBasicBlock::reverse_iterator fixTerminators ( const SIInstrInfo &  TII, MachineBasicBlock &  MBB  )

static

Definition at line 244 of file SIOptimizeExecMasking.cpp.

References E, I, MBB, llvm::MachineBasicBlock::rbegin(), removeTerminatorBit(), llvm::MachineBasicBlock::rend(), and TII.

getSaveExecOp()

static unsigned getSaveExecOp ( unsigned  Opc )

static

Definition at line 135 of file SIOptimizeExecMasking.cpp.

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	SIOptimizeExecMasking	,
		DEBUG_TYPE	,
		"SI optimize exec mask operations"	,
		false	,
		false
	)

isCopyFromExec()

static Register isCopyFromExec ( const MachineInstr &  MI, const GCNSubtarget &  ST  )

static

If MI is a copy from exec, return the register copied to.

Definition at line 56 of file SIOptimizeExecMasking.cpp.

References MI, and llvm::ARM_MB::ST.

Referenced by findExecCopy().

isCopyToExec()

static Register isCopyToExec ( const MachineInstr &  MI, const GCNSubtarget &  ST  )

static

If MI is a copy to exec, return the register copied from.

Definition at line 74 of file SIOptimizeExecMasking.cpp.

References llvm_unreachable, MI, and llvm::ARM_MB::ST.

isLiveOut()

static bool isLiveOut ( const MachineBasicBlock &  MBB, unsigned  Reg  )

static

Definition at line 287 of file SIOptimizeExecMasking.cpp.

References MBB, and llvm::MachineBasicBlock::successors().

Referenced by findPossibleVCMPVCMPXOptimization(), and llvm::MachineBasicBlock::SplitCriticalEdge().

isLogicalOpOnExec()

static Register isLogicalOpOnExec ( const MachineInstr &  MI )

static

If MI is a logical operation on an exec value, return the register copied to.

Definition at line 96 of file SIOptimizeExecMasking.cpp.

References llvm::MachineOperand::getReg(), llvm::MachineOperand::isReg(), and MI.

isRegisterInUseAfter()

static bool isRegisterInUseAfter ( MachineInstr &  Stop, MCRegister  Reg, const SIRegisterInfo *  TRI, MachineRegisterInfo &  MRI  )

static

Definition at line 359 of file SIOptimizeExecMasking.cpp.

Referenced by findPossibleVCMPVCMPXOptimization().

isRegisterInUseBetween()

static bool isRegisterInUseBetween ( MachineInstr &  Stop, MachineInstr &  Start, MCRegister  Reg, const SIRegisterInfo *  TRI, MachineRegisterInfo &  MRI, bool  useLiveOuts = false, bool  ignoreStart = false  )

static

Definition at line 335 of file SIOptimizeExecMasking.cpp.

Referenced by findPossibleVCMPVCMPXOptimization().

optimizeVCMPSaveExecSequence()

static bool optimizeVCMPSaveExecSequence ( MachineInstr &  SaveExecInstr, MachineInstr &  VCmp, MCRegister  Exec, const SIInstrInfo *  TII, const SIRegisterInfo *  TRI, MachineRegisterInfo &  MRI  )

static

Definition at line 448 of file SIOptimizeExecMasking.cpp.

References llvm::MachineInstrBuilder::addReg(), Builder, llvm::BuildMI(), llvm::misexpect::clamp(), llvm::MachineRegisterInfo::clearKillFlags(), llvm::MachineInstr::getDebugLoc(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::TargetRegisterInfo::getRegSizeInBits(), llvm::AMDGPU::getVCMPXOpFromVCMP(), llvm::MachineOperand::isReg(), Mod, MRI, TII, TRI, and llvm::MachineInstr::uses().

removeTerminatorBit()

static bool removeTerminatorBit ( const SIInstrInfo &  TII, MachineInstr &  MI  )

static

Definition at line 176 of file SIOptimizeExecMasking.cpp.

References MI, and TII.

Referenced by fixTerminators().

Variable Documentation

DEBUG_TYPE

DEBUG_TYPE

Definition at line 48 of file SIOptimizeExecMasking.cpp.

false

SI optimize exec mask false

Definition at line 49 of file SIOptimizeExecMasking.cpp.

operations

SI optimize exec mask operations

Definition at line 49 of file SIOptimizeExecMasking.cpp.