DeadMachineInstructionElim.cpp File Reference

#include "llvm/CodeGen/Passes.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Pass.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"

Include dependency graph for DeadMachineInstructionElim.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "codegen-dce"

Functions
	STATISTIC (NumDeletes,"Number of dead instructions deleted")
	if (!MI->isSafeToMove(TII, 0, SawStore)&&!MI->isPHI()) return false
	for (unsigned i=0, e=MI->getNumOperands();i!=e;++i)

Variables
INITIALIZE_PASS(DeadMachineInstructionElim,"dead-mi-elimination","Remove dead machine instructions", false, false) bool DeadMachineInstructionElim bool	SawStore = false
return	true

Macro Definition Documentation

#define DEBUG_TYPE   "codegen-dce"

Definition at line 14 of file DeadMachineInstructionElim.cpp.

Function Documentation

for	(	unsigned	i = 0,
		e	= MI->getNumOperands(); i != e; ++i
	)

Definition at line 66 of file DeadMachineInstructionElim.cpp.

References llvm::MachineOperand::getReg(), llvm::MachineOperand::isDef(), llvm::TargetRegisterInfo::isPhysicalRegister(), llvm::MachineOperand::isReg(), and MRI.

Referenced by llvm::SpecificBumpPtrAllocator< T >::DestroyAll(), llvm::DwarfUnits::emitAddresses(), llvm::DwarfDebug::endModule(), firstch(), freeset(), freezeset(), llvm::TargetLowering::getMultipleConstraintMatchWeight(), isProfitableChain(), llvm::LiveRange::join(), nch(), llvm::BitVector::operator&=(), llvm::LiveIntervals::repairIntervalsInRange(), llvm::AssemblyWriter::writeAllAttributeGroups(), llvm::MachineConstantPool::~MachineConstantPool(), and llvm::RecordKeeper::~RecordKeeper().

if

(

!MI->

isSafeToMoveTII, 0, SawStore)&&!MI->isPHI(

)

STATISTIC	(	NumDeletes	,
		"Number of dead instructions deleted"
	)

Variable Documentation

INITIALIZE_PASS (DeadMachineInstructionElim, "dead-mi-elimination", "Remove dead machine instructions", false, false) bool DeadMachineInstructionElim bool SawStore = false

Definition at line 61 of file DeadMachineInstructionElim.cpp.

Referenced by llvm::MachineInstr::isSafeToMove(), MaySpeculate(), and llvm::X86InstrInfo::optimizeLoadInstr().

return true

Definition at line 83 of file DeadMachineInstructionElim.cpp.