MachineCopyPropagation.cpp File Reference

#include "llvm/CodeGen/Passes.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Pass.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetSubtargetInfo.h"

Include dependency graph for MachineCopyPropagation.cpp:

Go to the source code of this file.

Defines
#define	DEBUG_TYPE   "codegen-cp"
Functions
	STATISTIC (NumDeletes,"Number of dead copies deleted")
	INITIALIZE_PASS (MachineCopyPropagation,"machine-cp","Machine Copy Propagation Pass", false, false) void MachineCopyPropagation
static bool	NoInterveningSideEffect (const MachineInstr *CopyMI, const MachineInstr *MI)
static bool	isNopCopy (MachineInstr *CopyMI, unsigned Def, unsigned Src, const TargetRegisterInfo *TRI)

---

Define Documentation

#define DEBUG_TYPE   "codegen-cp"

Definition at line 31 of file MachineCopyPropagation.cpp.

---

Function Documentation

INITIALIZE_PASS	(	MachineCopyPropagation	,
		"machine-cp"	,
		"Machine Copy Propagation Pass"	,
		false	,
		false
	)

Definition at line 63 of file MachineCopyPropagation.cpp.

References I, llvm::MCRegisterInfo::DiffListIterator::isValid(), and llvm::MCRegAliasIterator::isValid().

static bool isNopCopy	(	MachineInstr *	CopyMI,
		unsigned	Def,
		unsigned	Src,
		const TargetRegisterInfo *	TRI
	)		[static]

isNopCopy - Return true if the specified copy is really a nop. That is if the source of the copy is the same of the definition of the copy that supplied the source. If the source of the copy is a sub-register than it must check the sub-indices match. e.g. ecx = mov eax al = mov cl But not ecx = mov eax al = mov ch

Definition at line 115 of file MachineCopyPropagation.cpp.

References llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MCRegisterInfo::getSubRegIndex(), and llvm::MCRegisterInfo::isSubRegister().

static bool NoInterveningSideEffect	(	const MachineInstr *	CopyMI,
		const MachineInstr *	MI
	)		[static]

Definition at line 87 of file MachineCopyPropagation.cpp.

References llvm::MachineBasicBlock::end(), llvm::MachineInstr::getParent(), I, and llvm::AArch64CC::MI.

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