SystemZPostRewrite.cpp File Reference

#include "SystemZ.h"
#include "SystemZInstrInfo.h"
#include "SystemZSubtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineFunctionAnalysisManager.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachinePassManager.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/IR/Analysis.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "systemz-post-rewrite"

Functions
	STATISTIC (MemFoldCopies, "Number of copies inserted before folded mem ops.")
	STATISTIC (LOCRMuxJumps, "Number of LOCRMux jump-sequences (lower is better)")
	INITIALIZE_PASS (SystemZPostRewriteLegacy, "systemz-post-rewrite", "SystemZ Post Rewrite pass", false, false) FunctionPass *llvm
	Returns an instance of the Post Rewrite pass.
static bool	expandCondMove (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, MachineBasicBlock::iterator &NextMBBI, const TargetInstrInfo *TII)
static void	selectLOCRMux (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, MachineBasicBlock::iterator &NextMBBI, unsigned LowOpcode, unsigned HighOpcode, const TargetInstrInfo *TII)
static void	selectSELRMux (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, MachineBasicBlock::iterator &NextMBBI, unsigned LowOpcode, unsigned HighOpcode, const TargetInstrInfo *TII)
static bool	selectMI (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, MachineBasicBlock::iterator &NextMBBI, const TargetInstrInfo *TII)
	If MBBI references a pseudo instruction that should be selected here, do it and return true.
static bool	selectMBB (MachineBasicBlock &MBB, const TargetInstrInfo *TII)
	Iterate over the instructions in basic block MBB and select any pseudo instructions.
static bool	runPostRewriteOnMF (MachineFunction &MF)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "systemz-post-rewrite"

Definition at line 30 of file SystemZPostRewrite.cpp.

Function Documentation

expandCondMove()

bool expandCondMove ( MachineBasicBlock & MBB, MachineBasicBlock::iterator MBBI, MachineBasicBlock::iterator & NextMBBI, const TargetInstrInfo * TII )

static

Definition at line 60 of file SystemZPostRewrite.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineBasicBlock::addLiveIn(), llvm::MachineInstrBuilder::addMBB(), llvm::MachineInstrBuilder::addReg(), llvm::MachineBasicBlock::addSuccessor(), assert(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::MachineFunction::CreateMachineBasicBlock(), DL, llvm::MachineBasicBlock::end(), llvm::getRegState(), I, llvm::MachineFunction::insert(), MBB, MBBI, MI, llvm::MachineBasicBlock::splice(), TII, and llvm::MachineBasicBlock::transferSuccessors().

Referenced by selectLOCRMux(), and selectSELRMux().

INITIALIZE_PASS()

INITIALIZE_PASS	(	SystemZPostRewriteLegacy	,
		"systemz-post-rewrite"	,
		"SystemZ Post Rewrite pass"	,
		false	,
		false	)

Returns an instance of the Post Rewrite pass.

Definition at line 48 of file SystemZPostRewrite.cpp.

References llvm::createSystemZPostRewriteLegacyPass().

runPostRewriteOnMF()

bool runPostRewriteOnMF ( MachineFunction & MF )

static

Definition at line 267 of file SystemZPostRewrite.cpp.

References llvm::MachineFunction::getSubtarget(), MBB, Modified, selectMBB(), and TII.

Referenced by llvm::SystemZPostRewritePass::run().

selectLOCRMux()

void selectLOCRMux ( MachineBasicBlock & MBB, MachineBasicBlock::iterator MBBI, MachineBasicBlock::iterator & NextMBBI, unsigned LowOpcode, unsigned HighOpcode, const TargetInstrInfo * TII )

static

Definition at line 123 of file SystemZPostRewrite.cpp.

References expandCondMove(), llvm::SystemZ::isHighReg(), MBB, MBBI, and TII.

Referenced by selectMI().

selectMBB()

bool selectMBB ( MachineBasicBlock & MBB, const TargetInstrInfo * TII )

static

Iterate over the instructions in basic block MBB and select any pseudo instructions.

Return true if anything was modified.

Definition at line 254 of file SystemZPostRewrite.cpp.

References E(), MBB, MBBI, Modified, selectMI(), and TII.

Referenced by runPostRewriteOnMF().

selectMI()

bool selectMI ( MachineBasicBlock & MBB, MachineBasicBlock::iterator MBBI, MachineBasicBlock::iterator & NextMBBI, const TargetInstrInfo * TII )

static

If MBBI references a pseudo instruction that should be selected here, do it and return true.

Otherwise return false.

Definition at line 216 of file SystemZPostRewrite.cpp.

References llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineOperand::getReg(), llvm::SystemZ::getTargetMemOpcode(), MBB, MBBI, MI, selectLOCRMux(), selectSELRMux(), llvm::MachineOperand::setReg(), and TII.

Referenced by selectMBB().

selectSELRMux()

void selectSELRMux ( MachineBasicBlock & MBB, MachineBasicBlock::iterator MBBI, MachineBasicBlock::iterator & NextMBBI, unsigned LowOpcode, unsigned HighOpcode, const TargetInstrInfo * TII )

static

Definition at line 144 of file SystemZPostRewrite.cpp.

References llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), expandCondMove(), llvm::MachineOperand::getReg(), llvm::getRegState(), llvm::SystemZ::isHighReg(), MBB, MBBI, llvm::MachineOperand::setReg(), std::swap(), and TII.

Referenced by selectMI().

STATISTIC() [1/2]

STATISTIC	(	LOCRMuxJumps	,
		"Number of LOCRMux jump-sequences (lower is better)"	)

STATISTIC() [2/2]

STATISTIC	(	MemFoldCopies	,
		"Number of copies inserted before folded mem ops."	)