MachineSink.cpp File Reference

#include "llvm/CodeGen/Passes.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"

Include dependency graph for MachineSink.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "machine-sink"

Functions
	STATISTIC (NumSunk,"Number of machine instructions sunk")
	STATISTIC (NumSplit,"Number of critical edges split")
	STATISTIC (NumCoalesces,"Number of copies coalesced")
	INITIALIZE_PASS_BEGIN (MachineSinking,"machine-sink","Machine code sinking", false, false) INITIALIZE_PASS_END(MachineSinking
static bool	AvoidsSinking (MachineInstr *MI, MachineRegisterInfo *MRI)
static void	collectDebugValues (MachineInstr *MI, SmallVectorImpl< MachineInstr * > &DbgValues)
static bool	isPostDominatedBy (MachineBasicBlock *A, MachineBasicBlock *B)
	isPostDominatedBy - Return true if A is post dominated by B. More...

Variables
static cl::opt< bool >	SplitEdges ("machine-sink-split", cl::desc("Split critical edges during machine sinking"), cl::init(true), cl::Hidden)
machine	sink
machine Machine code	sinking
machine Machine code	false

Macro Definition Documentation

#define DEBUG_TYPE   "machine-sink"

Definition at line 19 of file MachineSink.cpp.

Function Documentation

static bool AvoidsSinking ( MachineInstr *  MI, MachineRegisterInfo *  MRI  )

static

Definition at line 407 of file MachineSink.cpp.

References llvm::MachineInstr::isInsertSubreg(), llvm::MachineInstr::isRegSequence(), and llvm::MachineInstr::isSubregToReg().

static void collectDebugValues ( MachineInstr *  MI, SmallVectorImpl< MachineInstr * > &  DbgValues  )

static

collectDebgValues - Scan instructions following MI and collect any matching DBG_VALUEs.

Definition at line 413 of file MachineSink.cpp.

References llvm::SmallVectorImpl< T >::clear(), llvm::X86II::DE, llvm::MachineBasicBlock::end(), llvm::MachineInstr::getOperand(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isReg(), llvm::A64CC::MI, and llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back().

INITIALIZE_PASS_BEGIN	(	MachineSinking	,
		"machine-sink"	,
		"Machine code sinking"	,
		false	,
		false
	)

static bool isPostDominatedBy ( MachineBasicBlock *  A, MachineBasicBlock *  B  )

static

isPostDominatedBy - Return true if A is post dominated by B.

Definition at line 431 of file MachineSink.cpp.

References I, llvm::MachineBasicBlock::succ_begin(), and llvm::MachineBasicBlock::succ_size().

STATISTIC	(	NumSunk	,
		"Number of machine instructions sunk"
	)

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

STATISTIC	(	NumCoalesces	,
		"Number of copies coalesced"
	)

Variable Documentation

machine Machine code false

Definition at line 120 of file MachineSink.cpp.

void LICM::sink

sink - When an instruction is found to only be used outside of the loop, this function moves it to the exit blocks and patches up SSA form as needed. This method is guaranteed to remove the original instruction from its position, and may either delete it or move it to outside of the loop.

Definition at line 120 of file MachineSink.cpp.

machine Machine code sinking

Definition at line 120 of file MachineSink.cpp.

cl::opt<bool> SplitEdges("machine-sink-split", cl::desc("Split critical edges during machine sinking"), cl::init(true), cl::Hidden)

static