PHIElimination.cpp File Reference

#include "llvm/CodeGen/LiveVariables.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Support/Compiler.h"
#include <algorithm>
#include <map>

Include dependency graph for PHIElimination.cpp:

Go to the source code of this file.

Defines
#define	DEBUG_TYPE   "phielim"
Functions
	STATISTIC (NumAtomic,"Number of atomic phis lowered")
static bool	isSourceDefinedByImplicitDef (const MachineInstr *MPhi, const MachineRegisterInfo *MRI)
Variables
static RegisterPass< PNE >	X ("phi-node-elimination","Eliminate PHI nodes for register allocation")

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Define Documentation

#define DEBUG_TYPE   "phielim"

Definition at line 16 of file PHIElimination.cpp.

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Function Documentation

static bool isSourceDefinedByImplicitDef	(	const MachineInstr *	MPhi,
		const MachineRegisterInfo *	MRI
	)			[static]

isSourceDefinedByImplicitDef - Return true if all sources of the phi node are implicit_def's.

Definition at line 132 of file PHIElimination.cpp.

References llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getVRegDef(), and llvm::TargetInstrInfo::IMPLICIT_DEF.

STATISTIC	(	NumAtomic	,
		"Number of atomic phis lowered"
	)

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Variable Documentation

char ID [static]

Definition at line 40 of file PHIElimination.cpp.

SmallPtrSet<MachineInstr*, 4> ImpDefs

Definition at line 74 of file PHIElimination.cpp.

Referenced by canClobberPhysRegDefs().

MachineRegisterInfo* MRI

Definition at line 37 of file PHIElimination.cpp.

VRegPHIUse VRegPHIUseCount

Definition at line 71 of file PHIElimination.cpp.

RegisterPass<PNE> X("phi-node-elimination","Eliminate PHI nodes for register allocation") [static]