MipsDelaySlotFiller.cpp File Reference

#include "Mips.h"
#include "MipsInstrInfo.h"
#include "MipsTargetMachine.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"

Include dependency graph for MipsDelaySlotFiller.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "delay-slot-filler"

Functions
	STATISTIC (FilledSlots,"Number of delay slots filled")
	STATISTIC (UsefulSlots,"Number of delay slots filled with instructions that"" are not NOP.")
static bool	hasUnoccupiedSlot (const MachineInstr *MI)
static void	insertDelayFiller (Iter Filler, const BB2BrMap &BrMap)
	This function inserts clones of Filler into predecessor blocks. More...
static void	addLiveInRegs (Iter Filler, MachineBasicBlock &MBB)
	This function adds registers Filler defines to MBB's live-in register list. More...

Variables
static cl::opt< bool >	DisableDelaySlotFiller ("disable-mips-delay-filler", cl::init(false), cl::desc("Fill all delay slots with NOPs."), cl::Hidden)
static cl::opt< bool >	DisableForwardSearch ("disable-mips-df-forward-search", cl::init(true), cl::desc("Disallow MIPS delay filler to search forward."), cl::Hidden)
static cl::opt< bool >	DisableSuccBBSearch ("disable-mips-df-succbb-search", cl::init(true), cl::desc("Disallow MIPS delay filler to search successor basic blocks."), cl::Hidden)
static cl::opt< bool >	DisableBackwardSearch ("disable-mips-df-backward-search", cl::init(false), cl::desc("Disallow MIPS delay filler to search backward."), cl::Hidden)

Macro Definition Documentation

#define DEBUG_TYPE   "delay-slot-filler"

Definition at line 14 of file MipsDelaySlotFiller.cpp.

Function Documentation

static void addLiveInRegs ( Iter  Filler, MachineBasicBlock &  MBB  )

static

This function adds registers Filler defines to MBB's live-in register list.

Definition at line 271 of file MipsDelaySlotFiller.cpp.

References llvm::MachineBasicBlock::addLiveIn(), llvm::TargetRegisterInfo::getAllocatableSet(), llvm::MachineBasicBlock::getParent(), llvm::MachineOperand::getReg(), llvm::TargetMachine::getRegisterInfo(), llvm::MachineFunction::getTarget(), I, llvm::MachineOperand::isDef(), llvm::MachineBasicBlock::isLiveIn(), llvm::MachineOperand::isReg(), and llvm::BitVector::test().

static bool hasUnoccupiedSlot ( const MachineInstr *  MI )

static

Definition at line 252 of file MipsDelaySlotFiller.cpp.

References llvm::MachineInstr::hasDelaySlot(), and llvm::MachineInstr::isBundledWithSucc().

static void insertDelayFiller ( Iter  Filler, const BB2BrMap &  BrMap  )

static

This function inserts clones of Filler into predecessor blocks.

Definition at line 257 of file MipsDelaySlotFiller.cpp.

References llvm::MIBundleBuilder::append(), llvm::MachineFunction::CloneMachineInstr(), and I.

STATISTIC	(	FilledSlots	,
		"Number of delay slots filled"
	)

STATISTIC	(	UsefulSlots	,
		"Number of delay slots filled with instructions that"" are not NOP."
	)

Variable Documentation

cl::opt<bool> DisableBackwardSearch("disable-mips-df-backward-search", cl::init(false), cl::desc("Disallow MIPS delay filler to search backward."), cl::Hidden)

static

cl::opt<bool> DisableDelaySlotFiller("disable-mips-delay-filler", cl::init(false), cl::desc("Fill all delay slots with NOPs."), cl::Hidden)

static

cl::opt<bool> DisableForwardSearch("disable-mips-df-forward-search", cl::init(true), cl::desc("Disallow MIPS delay filler to search forward."), cl::Hidden)

static

cl::opt<bool> DisableSuccBBSearch("disable-mips-df-succbb-search", cl::init(true), cl::desc("Disallow MIPS delay filler to search successor basic blocks."), cl::Hidden)

static