LLVM: lib/CodeGen/PHIElimination.cpp File Reference (original) (raw)

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Macros
#define	DEBUG_TYPE "phi-node-elimination"

Functions
	STATISTIC (NumLowered, "Number of phis lowered")
	STATISTIC (NumCriticalEdgesSplit, "Number of critical edges split")
	STATISTIC (NumReused, "Number of reused lowered phis")
	INITIALIZE_PASS_BEGIN (PHIElimination, DEBUG_TYPE, "Eliminate PHI nodes for register allocation", false, false) INITIALIZE_PASS_END(PHIElimination
static bool	isImplicitlyDefined (Register VirtReg, const MachineRegisterInfo &MRI)
	Return true if all defs of VirtReg are implicit-defs.
static bool	allPhiOperandsUndefined (const MachineInstr &MPhi, const MachineRegisterInfo &MRI)
	Return true if all sources of the phi node are implicit_def's, or undef's.

Variables
static cl::opt< bool >	DisableEdgeSplitting ("disable-phi-elim-edge-splitting", cl::init(false), cl::Hidden, cl::desc("Disable critical edge splitting " "during PHI elimination"))
static cl::opt< bool >	SplitAllCriticalEdges ("phi-elim-split-all-critical-edges", cl::init(false), cl::Hidden, cl::desc("Split all critical edges during " "PHI elimination"))
static cl::opt< bool >	NoPhiElimLiveOutEarlyExit ("no-phi-elim-live-out-early-exit", cl::init(false), cl::Hidden, cl::desc("Do not use an early exit if isLiveOutPastPHIs returns true."))
	DEBUG_TYPE
Eliminate PHI nodes for register	allocation
Eliminate PHI nodes for register	false

◆ DEBUG_TYPE

#define DEBUG_TYPE "phi-node-elimination"

◆ allPhiOperandsUndefined()

◆ INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	PHIElimination	,
DEBUG_TYPE	,
"Eliminate PHI nodes for register allocation"	,
false	,
false	)

◆ isImplicitlyDefined()

◆ STATISTIC() [1/3]

STATISTIC	(	NumCriticalEdgesSplit	,
"Number of critical edges split"	)

◆ STATISTIC() [2/3]

STATISTIC	(	NumLowered	,
"Number of phis lowered"	)

◆ STATISTIC() [3/3]

STATISTIC	(	NumReused	,
"Number of reused lowered phis"	)

◆ allocation

◆ DEBUG_TYPE

◆ DisableEdgeSplitting

cl::opt< bool > DisableEdgeSplitting("disable-phi-elim-edge-splitting", cl::init(false), cl::Hidden, cl::desc("Disable critical edge splitting " "during PHI elimination")) ( "disable-phi-elim-edge-splitting" , cl::init(false) , cl::Hidden , cl::desc("Disable critical edge splitting " "during PHI elimination") )	static

◆ false

◆ NoPhiElimLiveOutEarlyExit

cl::opt< bool > NoPhiElimLiveOutEarlyExit("no-phi-elim-live-out-early-exit", cl::init(false), cl::Hidden, cl::desc("Do not use an early exit if isLiveOutPastPHIs returns true.")) ( "no-phi-elim-live-out-early-exit" , cl::init(false) , cl::Hidden , cl::desc("Do not use an early exit if isLiveOutPastPHIs returns true.") )	static

◆ SplitAllCriticalEdges

cl::opt< bool > SplitAllCriticalEdges("phi-elim-split-all-critical-edges", cl::init(false), cl::Hidden, cl::desc("Split all critical edges during " "PHI elimination")) ( "phi-elim-split-all-critical-edges" , cl::init(false) , cl::Hidden , cl::desc("Split all critical edges during " "PHI elimination") )	static