MipsDelaySlotFiller.cpp File Reference (original) (raw)

Macros
#define	DEBUG_TYPE "mips-delay-slot-filler"

Enumerations
enum	CompactBranchPolicy { CB_Never, CB_Optimal, CB_Always }

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)
	INITIALIZE_PASS (MipsDelaySlotFiller, DEBUG_TYPE, "Fill delay slot for MIPS", false, false) static void insertDelayFiller(Iter Filler
	This function inserts clones of Filler into predecessor blocks.
	for (const auto &I :BrMap)
static void	addLiveInRegs (Iter Filler, MachineBasicBlock &MBB)
	This function adds registers Filler defines to MBB's live-in register list.
static int	getEquivalentCallShort (int Opcode)

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)
static cl::opt< CompactBranchPolicy >	MipsCompactBranchPolicy ("mips-compact-branches", cl::Optional, cl::init(CB_Optimal), cl::desc("MIPS Specific: Compact branch policy."), cl::values(clEnumValN(CB_Never, "never", "Do not use compact branches if possible."), clEnumValN(CB_Optimal, "optimal", "Use compact branches where appropriate (default)."), clEnumValN(CB_Always, "always", "Always use compact branches if possible.")))
const BB2BrMap &	BrMap

◆ DEBUG_TYPE

#define DEBUG_TYPE "mips-delay-slot-filler"

Enumerator
CB_Never	The policy 'never' may in some circumstances or for some ISAs not be absolutely adhered to.
CB_Optimal	Optimal is the default and will produce compact branches when delay slots cannot be filled.
CB_Always	'always' may in some circumstances may not be absolutely adhered to there may not be a corresponding compact form of a branch.

Definition at line 80 of file MipsDelaySlotFiller.cpp.

int getEquivalentCallShort ( int Opcode)	static

INITIALIZE_PASS	(	MipsDelaySlotFiller	,
DEBUG_TYPE	,
"Fill delay slot for MIPS"	,
false	,
false	)

This function inserts clones of Filler into predecessor blocks.

References DEBUG_TYPE.

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

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

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

cl::opt< CompactBranchPolicy > MipsCompactBranchPolicy("mips-compact-branches", cl::Optional, cl::init(CB_Optimal), cl::desc("MIPS Specific: Compact branch policy."), cl::values(clEnumValN(CB_Never, "never", "Do not use compact branches if possible."), clEnumValN(CB_Optimal, "optimal", "Use compact branches where appropriate (default)."), clEnumValN(CB_Always, "always", "Always use compact branches if possible."))) ( "mips-compact-branches" , cl::Optional , cl::init(CB_Optimal) , cl::desc("MIPS Specific: Compact branch policy.") , cl::values(clEnumValN(CB_Never, "never", "Do not use compact branches if possible."), clEnumValN(CB_Optimal, "optimal", "Use compact branches where appropriate (default)."), clEnumValN(CB_Always, "always", "Always use compact branches if possible.")) )

static