SplitKit.cpp File Reference

#include "SplitKit.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/LiveRangeEdit.h"
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetOpcodes.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/CodeGen/VirtRegMap.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/BlockFrequency.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <iterator>
#include <limits>
#include <tuple>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "regalloc"

Functions
	STATISTIC (NumFinished, "Number of splits finished")
	STATISTIC (NumSimple, "Number of splits that were simple")
	STATISTIC (NumCopies, "Number of copies inserted for splitting")
	STATISTIC (NumRemats, "Number of rematerialized defs for splitting")
template<typename T >
auto &	getSubrangeImpl (LaneBitmask LM, T &LI)
	Find a subrange corresponding to the exact lane mask LM in the live interval LI.
LiveInterval::SubRange &	getSubRangeForMaskExact (LaneBitmask LM, LiveInterval &LI)
const LiveInterval::SubRange &	getSubRangeForMaskExact (LaneBitmask LM, const LiveInterval &LI)
const LiveInterval::SubRange &	getSubRangeForMask (LaneBitmask LM, const LiveInterval &LI)
	Find a subrange corresponding to the lane mask LM, or a superset of it, in the live interval LI.
static bool	hasTiedUseOf (MachineInstr &MI, unsigned Reg)
static bool	removeDeadSegment (SlotIndex Def, LiveRange &LR)

Variables
static cl::opt< bool >	EnableLoopIVHeuristic ("enable-split-loopiv-heuristic", cl::desc("Enable loop iv regalloc heuristic"), cl::init(true))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "regalloc"

Definition at line 45 of file SplitKit.cpp.

Function Documentation

getSubRangeForMask()

const LiveInterval::SubRange & getSubRangeForMask	(	LaneBitmask	LM,
		const LiveInterval &	LI
	)

Find a subrange corresponding to the lane mask LM, or a superset of it, in the live interval LI.

The interval LI is assumed to contain such a subrange. This function is used to find corresponding subranges between the original interval and the new intervals.

Definition at line 421 of file SplitKit.cpp.

References llvm_unreachable, and llvm::LiveInterval::subranges().

getSubRangeForMaskExact() [1/2]

const LiveInterval::SubRange & getSubRangeForMaskExact	(	LaneBitmask	LM,
		const LiveInterval &	LI
	)

Definition at line 412 of file SplitKit.cpp.

References getSubrangeImpl().

getSubRangeForMaskExact() [2/2]

LiveInterval::SubRange & getSubRangeForMaskExact	(	LaneBitmask	LM,
		LiveInterval &	LI
	)

Definition at line 407 of file SplitKit.cpp.

References getSubrangeImpl().

getSubrangeImpl()

template<typename T >

auto & getSubrangeImpl	(	LaneBitmask	LM,
		T &	LI
	)

Find a subrange corresponding to the exact lane mask LM in the live interval LI.

The interval LI is assumed to contain such a subrange. This function is used to find corresponding subranges between the original interval and the new intervals.

Definition at line 400 of file SplitKit.cpp.

References llvm_unreachable.

Referenced by getSubRangeForMaskExact().

hasTiedUseOf()

static bool hasTiedUseOf ( MachineInstr &  MI, unsigned  Reg  )

static

Definition at line 817 of file SplitKit.cpp.

References llvm::any_of(), and MI.

Referenced by llvm::SplitEditor::overlapIntv().

removeDeadSegment()

static bool removeDeadSegment ( SlotIndex  Def, LiveRange &  LR  )

static

Definition at line 1243 of file SplitKit.cpp.

References llvm::LiveRange::Segment::end, llvm::LiveRange::getSegmentContaining(), and llvm::LiveRange::removeSegment().

STATISTIC() [1/4]

STATISTIC	(	NumCopies	,
		"Number of copies inserted for splitting"
	)

STATISTIC() [2/4]

STATISTIC	(	NumFinished	,
		"Number of splits finished"
	)

STATISTIC() [3/4]

STATISTIC	(	NumRemats	,
		"Number of rematerialized defs for splitting"
	)

STATISTIC() [4/4]

STATISTIC	(	NumSimple	,
		"Number of splits that were simple"
	)

Variable Documentation

EnableLoopIVHeuristic

cl::opt< bool > EnableLoopIVHeuristic("enable-split-loopiv-heuristic", cl::desc("Enable loop iv regalloc heuristic"), cl::init(true)) ( "enable-split-loopiv-heuristic"  , cl::desc("Enable loop iv regalloc heuristic")  , cl::init(true)    )

static