llvm::SPUFrameInfo Class Reference

#include <SPUFrameInfo.h>

Inheritance diagram for llvm::SPUFrameInfo:

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Collaboration diagram for llvm::SPUFrameInfo:

[legend]

List of all members.

Public Member Functions
	SPUFrameInfo (const TargetMachine &tm)
const std::pair< unsigned, int > *	getCalleeSaveSpillSlots (unsigned &NumEntries) const
	Return a function's saved spill slots.
Static Public Member Functions
static int	stackSlotSize ()
	Stack slot size (16 bytes).
static int	maxFrameOffset ()
	Maximum frame offset representable by a signed 10-bit integer.
static int	minFrameOffset ()
	Minimum frame offset representable by a signed 10-bit integer.
static int	minStackSize ()
	Minimum frame size (enough to spill LR + SP).
static int	fullSpillSize ()
	Frame size required to spill all registers plus frame info.
static int	FItoStackOffset (int frame_index)
	Convert frame index to stack offset.
static int	branchHintPenalty ()
	Number of instructions required to overcome hint-for-branch latency.

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Detailed Description

Definition at line 22 of file SPUFrameInfo.h.

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Constructor & Destructor Documentation

SPUFrameInfo::SPUFrameInfo

(

const TargetMachine &

tm

)

Definition at line 23 of file SPUFrameInfo.cpp.

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Member Function Documentation

const std::pair< unsigned, int > * SPUFrameInfo::getCalleeSaveSpillSlots

(

unsigned &

NumEntries

)

const

Return a function's saved spill slots.

For CellSPU, a function's saved spill slots is just the link register.

Definition at line 41 of file SPUTargetMachine.cpp.

static int llvm::SPUFrameInfo::stackSlotSize

(

)

[inline, static]

Stack slot size (16 bytes).

Definition at line 37 of file SPUFrameInfo.h.

Referenced by llvm::SPURegisterInfo::emitEpilogue(), FItoStackOffset(), fullSpillSize(), LowerCALL(), LowerFORMAL_ARGUMENTS(), maxFrameOffset(), minFrameOffset(), and minStackSize().

static int llvm::SPUFrameInfo::maxFrameOffset

(

)

[inline, static]

Maximum frame offset representable by a signed 10-bit integer.

This is the maximum frame offset that can be expressed as a 10-bit integer, used in D-form addresses.

Definition at line 45 of file SPUFrameInfo.h.

References stackSlotSize().

Referenced by llvm::SPURegisterInfo::eliminateFrameIndex(), llvm::SPUInstrInfo::foldMemoryOperandImpl(), llvm::SPUInstrInfo::loadRegFromStackSlot(), and llvm::SPUInstrInfo::storeRegToStackSlot().

static int llvm::SPUFrameInfo::minFrameOffset

(

)

[inline, static]

Minimum frame offset representable by a signed 10-bit integer.

Definition at line 49 of file SPUFrameInfo.h.

References stackSlotSize().

Referenced by llvm::SPURegisterInfo::eliminateFrameIndex().

static int llvm::SPUFrameInfo::minStackSize

(

)

[inline, static]

Minimum frame size (enough to spill LR + SP).

Definition at line 53 of file SPUFrameInfo.h.

References stackSlotSize().

Referenced by llvm::SPURegisterInfo::eliminateFrameIndex(), llvm::SPURegisterInfo::emitEpilogue(), llvm::SPURegisterInfo::emitPrologue(), LowerCALL(), and LowerFORMAL_ARGUMENTS().

static int llvm::SPUFrameInfo::fullSpillSize

(

)

[inline, static]

Frame size required to spill all registers plus frame info.

Definition at line 57 of file SPUFrameInfo.h.

References llvm::SPURegisterInfo::getNumArgRegs(), and stackSlotSize().

static int llvm::SPUFrameInfo::FItoStackOffset

(

int

frame_index

)

[inline, static]

Convert frame index to stack offset.

Definition at line 61 of file SPUFrameInfo.h.

References stackSlotSize().

static int llvm::SPUFrameInfo::branchHintPenalty

(

)

[inline, static]

Number of instructions required to overcome hint-for-branch latency.

HBR (hint-for-branch) instructions can be inserted when, for example, we know that a given function is going to be called, such as printf(), in the control flow graph. HBRs are only inserted if a sufficient number of instructions occurs between the HBR and the target. Currently, HBRs take 6 cycles, ergo, the magic number 6.

Definition at line 72 of file SPUFrameInfo.h.

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

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The documentation for this class was generated from the following files:

• SPUFrameInfo.h
• SPUFrameInfo.cpp
• SPUTargetMachine.cpp