LiveIntervals.cpp File Reference

#include "llvm/CodeGen/LiveIntervals.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/CodeGen/LiveInterval.h"
#include "llvm/CodeGen/LiveIntervalCalc.h"
#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBundle.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/MachineSizeOpts.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/SlotIndexes.h"
#include "llvm/CodeGen/StackMaps.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/ProfileSummary.h"
#include "llvm/IR/Statepoint.h"
#include "llvm/MC/LaneBitmask.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Pass.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <iterator>
#include <tuple>
#include <utility>

Go to the source code of this file.

Classes
class	llvm::LiveIntervals::HMEditor
	Toolkit used by handleMove to trim or extend live intervals. More...

Macros
#define	DEBUG_TYPE   "regalloc"

Functions
	INITIALIZE_PASS_BEGIN (LiveIntervalsWrapperPass, "liveintervals", "Live Interval Analysis", false, false) INITIALIZE_PASS_END(LiveIntervalsWrapperPass
static void	createSegmentsForValues (LiveRange &LR, iterator_range< LiveInterval::vni_iterator > VNIs)
static bool	hasLiveThroughUse (const MachineInstr *MI, Register Reg)
	Check whether use of reg in MI is live-through.

Variables
	liveintervals
Live Interval	Analysis
Live Interval	false
static cl::opt< bool >	EnablePrecomputePhysRegs ("precompute-phys-liveness", cl::Hidden, cl::desc("Eagerly compute live intervals for all physreg units."))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "regalloc"

Definition at line 60 of file LiveIntervals.cpp.

Function Documentation

createSegmentsForValues()

void createSegmentsForValues ( LiveRange & LR, iterator_range< LiveInterval::vni_iterator > VNIs )

static

Definition at line 390 of file LiveIntervals.cpp.

References llvm::LiveRange::addSegment(), llvm::VNInfo::def, and llvm::VNInfo::isUnused().

Referenced by llvm::LiveIntervals::shrinkToUses(), and llvm::LiveIntervals::shrinkToUses().

hasLiveThroughUse()

bool hasLiveThroughUse ( const MachineInstr * MI, Register Reg )

static

Check whether use of reg in MI is live-through.

Live-through means that the value is alive on exit from Machine instruction. The example of such use is a deopt value in statepoint instruction.

Definition at line 939 of file LiveIntervals.cpp.

References llvm::DeoptLiveIn, E(), llvm::StatepointOpers::getFlags(), llvm::StatepointOpers::getNumDeoptArgsIdx(), llvm::StatepointOpers::getNumGCPtrIdx(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isReg(), MI, and Reg.

Referenced by llvm::LiveIntervals::checkRegMaskInterference().

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	LiveIntervalsWrapperPass	,
		"liveintervals"	,
		"Live Interval Analysis"	,
		false	,
		false	)

References INITIALIZE_PASS_DEPENDENCY.

Variable Documentation

Analysis

Live Interval Analysis

Definition at line 86 of file LiveIntervals.cpp.

EnablePrecomputePhysRegs

cl::opt< bool > EnablePrecomputePhysRegs("precompute-phys-liveness", cl::Hidden, cl::desc("Eagerly compute live intervals for all physreg units.")) ( "precompute-phys-liveness" , cl::Hidden , cl::desc("Eagerly compute live intervals for all physreg units.")  )

static

false

Live Interval false

Definition at line 86 of file LiveIntervals.cpp.

liveintervals

liveintervals

Definition at line 85 of file LiveIntervals.cpp.