#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/InitializePasses.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Pass.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/DebugCounter.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <iterator>

Include dependency graph for MachineCopyPropagation.cpp:

Macros
#define	DEBUG_TYPE "machine-cp"

Functions
	STATISTIC (NumDeletes, "Number of dead copies deleted")

	STATISTIC (NumCopyForwards, "Number of copy uses forwarded")

	STATISTIC (NumCopyBackwardPropagated, "Number of copy defs backward propagated")

	DEBUG_COUNTER (FwdCounter, "machine-cp-fwd", "Controls which register COPYs are forwarded")

	INITIALIZE_PASS (MachineCopyPropagation, DEBUG_TYPE, "Machine Copy Propagation Pass", false, false) void MachineCopyPropagation

static bool	isNopCopy (const MachineInstr &PreviousCopy, MCRegister Src, MCRegister Def, const TargetRegisterInfo *TRI)
	Return true if `PreviousCopy` did copy register `Src` to register `Def`. More...

static bool	isBackwardPropagatableCopy (MachineInstr &MI, const MachineRegisterInfo &MRI)

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "machine-cp"

Definition at line 78 of file MachineCopyPropagation.cpp.

Function Documentation

◆ DEBUG_COUNTER()

DEBUG_COUNTER	(	FwdCounter	,
		"machine-cp-fwd"	,
		"Controls which register COPYs are forwarded"
	)

◆ INITIALIZE_PASS()

INITIALIZE_PASS	(	MachineCopyPropagation	,
		DEBUG_TYPE	,
		"Machine Copy Propagation Pass"	,
		false	,
		false
	)

Definition at line 310 of file MachineCopyPropagation.cpp.

References llvm::dbgs(), llvm::MCRegisterInfo::DiffListIterator::isValid(), LLVM_DEBUG, and TRI.

◆ isBackwardPropagatableCopy()

static bool isBackwardPropagatableCopy	(	MachineInstr &	MI,
		const MachineRegisterInfo &	MRI
	)

static

Definition at line 774 of file MachineCopyPropagation.cpp.

References assert(), llvm::tgtok::Def, llvm::MachineRegisterInfo::isReserved(), MI, and MRI.

◆ isNopCopy()

static bool isNopCopy	(	const MachineInstr &	PreviousCopy,
		MCRegister	Src,
		MCRegister	Def,
		const TargetRegisterInfo *	TRI
	)

static

Return true if PreviousCopy did copy register Src to register Def.

This fact may have been obscured by sub register usage or may not be true at all even though Src and Def are subregisters of the registers used in PreviousCopy. e.g. isNopCopy("ecx = COPY eax", AX, CX) == true isNopCopy("ecx = COPY eax", AH, CL) == false

Definition at line 336 of file MachineCopyPropagation.cpp.

References llvm::Register::asMCReg(), llvm::tgtok::Def, llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MCRegisterInfo::getSubRegIndex(), llvm::MCRegisterInfo::isSubRegister(), and TRI.

◆ STATISTIC() [1/3]

STATISTIC	(	NumCopyBackwardPropagated	,
		"Number of copy defs backward propagated"
	)

◆ STATISTIC() [2/3]

STATISTIC	(	NumCopyForwards	,
		"Number of copy uses forwarded"
	)

◆ STATISTIC() [3/3]

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

Macros

Functions