#include "PPCFrameLowering.h"
#include "PPCInstrBuilder.h"
#include "PPCInstrInfo.h"
#include "PPCMachineFunctionInfo.h"
#include "PPCSubtarget.h"
#include "PPCTargetMachine.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/IR/Function.h"
#include "llvm/Target/TargetOptions.h"

Include dependency graph for PPCFrameLowering.cpp:

Macros
#define	DEBUG_TYPE "framelowering"

Functions
	STATISTIC (NumNoNeedForFrame, "Number of functions without frames")

	STATISTIC (NumPESpillVSR, "Number of spills to vector in prologue")

	STATISTIC (NumPEReloadVSR, "Number of reloads from vector in epilogue")

static unsigned	computeReturnSaveOffset (const PPCSubtarget &STI)

static unsigned	computeTOCSaveOffset (const PPCSubtarget &STI)

static unsigned	computeFramePointerSaveOffset (const PPCSubtarget &STI)

static unsigned	computeLinkageSize (const PPCSubtarget &STI)

static unsigned	computeBasePointerSaveOffset (const PPCSubtarget &STI)

static void	RemoveVRSaveCode (MachineInstr &MI)
	RemoveVRSaveCode - We have found that this function does not need any code to manipulate the VRSAVE register, even though it uses vector registers. More...

static void	HandleVRSaveUpdate (MachineInstr &MI, const TargetInstrInfo &TII)

static bool	spillsCR (const MachineFunction &MF)

static bool	spillsVRSAVE (const MachineFunction &MF)

static bool	hasSpills (const MachineFunction &MF)

static bool	hasNonRISpills (const MachineFunction &MF)

static bool	MustSaveLR (const MachineFunction &MF, unsigned LR)
	MustSaveLR - Return true if this function requires that we save the LR register onto the stack in the prolog and restore it in the epilog of the function. More...

static void	restoreCRs (bool isPPC64, bool is31, bool CR2Spilled, bool CR3Spilled, bool CR4Spilled, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, unsigned CSIIndex)

Variables
static cl::opt< bool >	EnablePEVectorSpills ("ppc-enable-pe-vector-spills", cl::desc("Enable spills in prologue to vector registers."), cl::init(false), cl::Hidden)

static const MCPhysReg	VRRegNo []
	VRRegNo - Map from a numbered VR register to its enum value. More...

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "framelowering"

Definition at line 32 of file PPCFrameLowering.cpp.

Function Documentation

◆ computeBasePointerSaveOffset()

static unsigned computeBasePointerSaveOffset ( const PPCSubtarget & STI )

static

Definition at line 83 of file PPCFrameLowering.cpp.

References llvm::PPCSubtarget::getTargetMachine(), llvm::PPCSubtarget::isDarwinABI(), llvm::TargetMachine::isPositionIndependent(), and llvm::PPCSubtarget::isPPC64().

◆ computeFramePointerSaveOffset()

static unsigned computeFramePointerSaveOffset ( const PPCSubtarget & STI )

static

Definition at line 62 of file PPCFrameLowering.cpp.

References llvm::PPCSubtarget::isDarwinABI(), and llvm::PPCSubtarget::isPPC64().

◆ computeLinkageSize()

static unsigned computeLinkageSize ( const PPCSubtarget & STI )

static

Definition at line 75 of file PPCFrameLowering.cpp.

References llvm::PPCSubtarget::isDarwinABI(), llvm::PPCSubtarget::isELFv2ABI(), and llvm::PPCSubtarget::isPPC64().

◆ computeReturnSaveOffset()

static unsigned computeReturnSaveOffset ( const PPCSubtarget & STI )

static

Definition at line 51 of file PPCFrameLowering.cpp.

References llvm::PPCSubtarget::isDarwinABI(), and llvm::PPCSubtarget::isPPC64().

◆ computeTOCSaveOffset()

static unsigned computeTOCSaveOffset ( const PPCSubtarget & STI )

static

Definition at line 58 of file PPCFrameLowering.cpp.

References llvm::PPCSubtarget::isELFv2ABI().

◆ HandleVRSaveUpdate()

static void HandleVRSaveUpdate	(	MachineInstr &	MI,
		const TargetInstrInfo &	TII
	)

static

Definition at line 333 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineBasicBlock::back(), llvm::MachineFunction::begin(), llvm::BuildMI(), E, llvm::MachineFunction::end(), llvm::MachineInstr::eraseFromParent(), llvm::MCInstrInfo::get(), llvm::MachineInstr::getDebugLoc(), llvm::MCRegisterInfo::getEncodingValue(), llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::MachineFunction::getRegInfo(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), I, llvm::MachineRegisterInfo::isPhysRegModified(), llvm::MachineOperand::isReg(), llvm::MachineBasicBlock::isReturnBlock(), llvm::RegState::Kill, llvm::MachineRegisterInfo::liveins(), MI, MRI, RemoveVRSaveCode(), llvm::MipsISD::Ret, and TRI.

Referenced by llvm::PPCFrameLowering::emitPrologue().

◆ hasNonRISpills()

static bool hasNonRISpills ( const MachineFunction & MF )

static

Definition at line 430 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::getInfo(), and llvm::PPCFunctionInfo::hasNonRISpills().

Referenced by llvm::PPCFrameLowering::addScavengingSpillSlot().

◆ hasSpills()

static bool hasSpills ( const MachineFunction & MF )

static

Definition at line 425 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::getInfo(), and llvm::PPCFunctionInfo::hasSpills().

Referenced by llvm::PPCFrameLowering::addScavengingSpillSlot().

◆ MustSaveLR()

static bool MustSaveLR	(	const MachineFunction &	MF,
		unsigned	LR
	)

static

MustSaveLR - Return true if this function requires that we save the LR register onto the stack in the prolog and restore it in the epilog of the function.

Definition at line 438 of file PPCFrameLowering.cpp.

References llvm::MachineRegisterInfo::def_begin(), llvm::MachineRegisterInfo::def_end(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getRegInfo(), and llvm::PPCFunctionInfo::isLRStoreRequired().

Referenced by llvm::PPCFrameLowering::determineCalleeSaves(), llvm::PPCFrameLowering::determineFrameLayout(), llvm::PPCFrameLowering::emitEpilogue(), and llvm::PPCFrameLowering::emitPrologue().

◆ RemoveVRSaveCode()

static void RemoveVRSaveCode ( MachineInstr & MI )

static

RemoveVRSaveCode - We have found that this function does not need any code to manipulate the VRSAVE register, even though it uses vector registers.

This can happen when the only registers used are known to be live in or out of the function. Remove all of the VRSAVE related code from the function. FIXME: The removal of the code results in a compile failure at -O0 when the function contains a function call, as the GPR containing original VRSAVE contents is spilled and reloaded around the call. Without the prolog code, the spill instruction refers to an undefined register. This code needs to account for all uses of that GPR.

Definition at line 287 of file PPCFrameLowering.cpp.

References assert(), llvm::MachineBasicBlock::begin(), llvm::MachineFunction::begin(), E, llvm::MachineBasicBlock::end(), llvm::MachineFunction::end(), llvm::MachineInstr::eraseFromParent(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), I, and MI.

Referenced by HandleVRSaveUpdate().

◆ restoreCRs()

static void restoreCRs	(	bool	isPPC64,
		bool	is31,
		bool	CR2Spilled,
		bool	CR3Spilled,
		bool	CR4Spilled,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		const std::vector< CalleeSavedInfo > &	CSI,
		unsigned	CSIIndex
	)

static

Definition at line 2114 of file PPCFrameLowering.cpp.

References llvm::addFrameReference(), llvm::BuildMI(), llvm::PPCFrameLowering::eliminateCallFramePseudoInstr(), llvm::getKillRegState(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getSubtarget(), llvm::MachineBasicBlock::insert(), llvm::MCID::MoveReg, and TII.

Referenced by llvm::PPCFrameLowering::restoreCalleeSavedRegisters().

◆ spillsCR()

static bool spillsCR ( const MachineFunction & MF )

static

Definition at line 415 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::getInfo(), and llvm::PPCFunctionInfo::isCRSpilled().

Referenced by llvm::PPCFrameLowering::addScavengingSpillSlot(), and llvm::PPCFrameLowering::processFunctionBeforeFrameFinalized().

◆ spillsVRSAVE()

static bool spillsVRSAVE ( const MachineFunction & MF )

static

Definition at line 420 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::getInfo(), and llvm::PPCFunctionInfo::isVRSAVESpilled().

Referenced by llvm::PPCFrameLowering::addScavengingSpillSlot().

◆ STATISTIC() [1/3]

STATISTIC	(	NumNoNeedForFrame	,
		"Number of functions without frames"
	)

◆ STATISTIC() [2/3]

STATISTIC	(	NumPESpillVSR	,
		"Number of spills to vector in prologue"
	)

◆ STATISTIC() [3/3]

STATISTIC	(	NumPEReloadVSR	,
		"Number of reloads from vector in epilogue"
	)

Variable Documentation

◆ EnablePEVectorSpills

cl::opt<bool> EnablePEVectorSpills("ppc-enable-pe-vector-spills", cl::desc("Enable spills in prologue to vector registers."), cl::init(false), cl::Hidden)

static

Referenced by llvm::PPCFrameLowering::assignCalleeSavedSpillSlots().

◆ VRRegNo

const MCPhysReg VRRegNo[]

static

Initial value:

= {
 PPC::V0 , PPC::V1 , PPC::V2 , PPC::V3 , PPC::V4 , PPC::V5 , PPC::V6 , PPC::V7 ,
 PPC::V8 , PPC::V9 , PPC::V10, PPC::V11, PPC::V12, PPC::V13, PPC::V14, PPC::V15,
 PPC::V16, PPC::V17, PPC::V18, PPC::V19, PPC::V20, PPC::V21, PPC::V22, PPC::V23,
 PPC::V24, PPC::V25, PPC::V26, PPC::V27, PPC::V28, PPC::V29, PPC::V30, PPC::V31
}

VRRegNo - Map from a numbered VR register to its enum value.

Definition at line 44 of file PPCFrameLowering.cpp.

Macros

Functions

Variables

Macro Definition Documentation

◆ DEBUG_TYPE

Function Documentation

◆ computeBasePointerSaveOffset()

◆ computeFramePointerSaveOffset()

◆ computeLinkageSize()

◆ computeReturnSaveOffset()

◆ computeTOCSaveOffset()

◆ HandleVRSaveUpdate()

◆ hasNonRISpills()

◆ hasSpills()

◆ MustSaveLR()

◆ RemoveVRSaveCode()

◆ restoreCRs()

◆ spillsCR()

◆ spillsVRSAVE()

◆ STATISTIC() [1/3]

◆ STATISTIC() [2/3]

◆ STATISTIC() [3/3]

Variable Documentation

◆ EnablePEVectorSpills

◆ VRRegNo