GCNRegPressure.cpp File Reference

This file implements the GCNRegPressure class. More...

#include "GCNRegPressure.h"
#include "AMDGPU.h"
#include "llvm/CodeGen/RegisterPressure.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "machine-scheduler"
#define	PFX   " "

Functions
static LaneBitmask	getDefRegMask (const MachineOperand &MO, const MachineRegisterInfo &MRI)
static void	collectVirtualRegUses (SmallVectorImpl< VRegMaskOrUnit > &VRegMaskOrUnits, const MachineInstr &MI, const LiveIntervals &LIS, const MachineRegisterInfo &MRI)
static LaneBitmask	getLanesWithProperty (const LiveIntervals &LIS, const MachineRegisterInfo &MRI, bool TrackLaneMasks, Register RegUnit, SlotIndex Pos, LaneBitmask SafeDefault, function_ref< bool(const LiveRange &LR, SlotIndex Pos)> Property)
	Mostly copy/paste from CodeGen/RegisterPressure.cpp.
static LaneBitmask	findUseBetween (unsigned Reg, LaneBitmask LastUseMask, SlotIndex PriorUseIdx, SlotIndex NextUseIdx, const MachineRegisterInfo &MRI, const SIRegisterInfo *TRI, const LiveIntervals *LIS, bool Upward=false)
	Mostly copy/paste from CodeGen/RegisterPressure.cpp Helper to find a vreg use between two indices {PriorUseIdx, NextUseIdx}.
static LaneBitmask	getRegLiveThroughMask (const MachineRegisterInfo &MRI, const LiveIntervals &LIS, Register Reg, SlotIndex Begin, SlotIndex End, LaneBitmask Mask=LaneBitmask::getAll())

Variables
static cl::opt< bool >	UseDownwardTracker ("amdgpu-print-rp-downward", cl::desc("Use GCNDownwardRPTracker for GCNRegPressurePrinter pass"), cl::init(false), cl::Hidden)

Detailed Description

This file implements the GCNRegPressure class.

Definition in file GCNRegPressure.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "machine-scheduler"

Definition at line 20 of file GCNRegPressure.cpp.

PFX

#define PFX   " "

Function Documentation

collectVirtualRegUses()

static void collectVirtualRegUses ( SmallVectorImpl< VRegMaskOrUnit > &  VRegMaskOrUnits, const MachineInstr &  MI, const LiveIntervals &  LIS, const MachineRegisterInfo &  MRI  )

static

Definition at line 259 of file GCNRegPressure.cpp.

References llvm::SmallVectorImpl< T >::emplace_back(), llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::find_if(), llvm::SlotIndex::getBaseIndex(), llvm::LiveIntervals::getInstructionIndex(), llvm::LiveIntervals::getInterval(), llvm::getLiveLaneMask(), llvm::LaneBitmask::getNone(), I, MI, MRI, P, and TRI.

Referenced by llvm::GCNUpwardRPTracker::recede().

findUseBetween()

static LaneBitmask findUseBetween ( unsigned  Reg, LaneBitmask  LastUseMask, SlotIndex  PriorUseIdx, SlotIndex  NextUseIdx, const MachineRegisterInfo &  MRI, const SIRegisterInfo *  TRI, const LiveIntervals *  LIS, bool  Upward = false  )

static

Mostly copy/paste from CodeGen/RegisterPressure.cpp Helper to find a vreg use between two indices {PriorUseIdx, NextUseIdx}.

The query starts with a lane bitmask which gets lanes/bits removed for every use we find.

Definition at line 331 of file GCNRegPressure.cpp.

References llvm::LiveIntervals::getInstructionIndex(), llvm::LaneBitmask::getNone(), llvm::SlotIndex::getRegSlot(), InRange(), MI, MRI, llvm::LaneBitmask::none(), and TRI.

getDefRegMask()

static LaneBitmask getDefRegMask ( const MachineOperand &  MO, const MachineRegisterInfo &  MRI  )

static

Definition at line 246 of file GCNRegPressure.cpp.

References assert(), llvm::MachineOperand::getReg(), llvm::MachineOperand::getSubReg(), llvm::MachineOperand::isDef(), llvm::MachineOperand::isReg(), llvm::Register::isVirtual(), and MRI.

Referenced by llvm::GCNDownwardRPTracker::advanceToNext(), and llvm::GCNUpwardRPTracker::recede().

getLanesWithProperty()

static LaneBitmask getLanesWithProperty ( const LiveIntervals &  LIS, const MachineRegisterInfo &  MRI, bool  TrackLaneMasks, Register  RegUnit, SlotIndex  Pos, LaneBitmask  SafeDefault, function_ref< bool(const LiveRange &LR, SlotIndex Pos)>  Property  )

static

Mostly copy/paste from CodeGen/RegisterPressure.cpp.

Definition at line 300 of file GCNRegPressure.cpp.

References llvm::LaneBitmask::getAll(), llvm::LiveIntervals::getCachedRegUnit(), llvm::LiveIntervals::getInterval(), llvm::LaneBitmask::getNone(), llvm::LiveInterval::hasSubRanges(), llvm::Register::isVirtual(), MRI, and llvm::LiveInterval::subranges().

getRegLiveThroughMask()

static LaneBitmask getRegLiveThroughMask ( const MachineRegisterInfo &  MRI, const LiveIntervals &  LIS, Register  Reg, SlotIndex  Begin, SlotIndex  End, LaneBitmask  Mask = LaneBitmask::getAll()  )

static

Definition at line 767 of file GCNRegPressure.cpp.

References End, llvm::LiveInterval::hasSubRanges(), MRI, and llvm::LiveInterval::subranges().

Referenced by llvm::GCNRegPressurePrinter::runOnMachineFunction().

Variable Documentation

UseDownwardTracker

cl::opt< bool > UseDownwardTracker("amdgpu-print-rp-downward", cl::desc("Use GCNDownwardRPTracker for GCNRegPressurePrinter pass"), cl::init(false), cl::Hidden) ( "amdgpu-print-rp-downward"  , cl::desc("Use GCNDownwardRPTracker for GCNRegPressurePrinter pass")  , cl::init(false)  , cl::Hidden    )

static

Referenced by llvm::GCNRegPressurePrinter::runOnMachineFunction().