llvm::SMEAttrs Class Reference

SMEAttrs is a utility class to parse the SME ACLE attributes on functions. More...

#include "Target/AArch64/Utils/AArch64SMEAttributes.h"

Public Types
enum class	StateValue {   None = 0 , In = 1 , Out = 2 , InOut = 3 ,   Preserved = 4 , New = 5 }
enum	Mask {   Normal = 0 , SM_Enabled = 1 << 0 , SM_Compatible = 1 << 1 , SM_Body = 1 << 2 ,   SME_ABI_Routine = 1 << 3 , ZA_State_Agnostic = 1 << 4 , ZA_Shift = 5 , ZA_Mask = 0b111 << ZA_Shift ,   ZT0_Shift = 8 , ZT0_Mask = 0b111 << ZT0_Shift }

Public Member Functions
	SMEAttrs (unsigned Mask=Normal)
	SMEAttrs (const Function &F)
	SMEAttrs (const CallBase &CB)
	SMEAttrs (const AttributeList &L)
	SMEAttrs (StringRef FuncName)
void	set (unsigned M, bool Enable=true)
bool	hasStreamingBody () const
bool	hasStreamingInterface () const
bool	hasStreamingInterfaceOrBody () const
bool	hasStreamingCompatibleInterface () const
bool	hasNonStreamingInterface () const
bool	hasNonStreamingInterfaceAndBody () const
bool	requiresSMChange (const SMEAttrs &Callee) const
bool	isNewZA () const
bool	isInZA () const
bool	isOutZA () const
bool	isInOutZA () const
bool	isPreservesZA () const
bool	sharesZA () const
bool	hasAgnosticZAInterface () const
bool	hasSharedZAInterface () const
bool	hasPrivateZAInterface () const
bool	hasZAState () const
bool	requiresLazySave (const SMEAttrs &Callee) const
bool	isNewZT0 () const
bool	isInZT0 () const
bool	isOutZT0 () const
bool	isInOutZT0 () const
bool	isPreservesZT0 () const
bool	sharesZT0 () const
bool	hasZT0State () const
bool	requiresPreservingZT0 (const SMEAttrs &Callee) const
bool	requiresDisablingZABeforeCall (const SMEAttrs &Callee) const
bool	requiresEnablingZAAfterCall (const SMEAttrs &Callee) const
bool	requiresPreservingAllZAState (const SMEAttrs &Callee) const

Static Public Member Functions
static StateValue	decodeZAState (unsigned Bitmask)
static unsigned	encodeZAState (StateValue S)
static StateValue	decodeZT0State (unsigned Bitmask)
static unsigned	encodeZT0State (StateValue S)

Detailed Description

SMEAttrs is a utility class to parse the SME ACLE attributes on functions.

It helps determine a function's requirements for PSTATE.ZA and PSTATE.SM. It has interfaces to query whether a streaming mode change or lazy-save mechanism is required when going from one function to another (e.g. through a call).

Definition at line 25 of file AArch64SMEAttributes.h.

Member Enumeration Documentation

Mask

enum llvm::SMEAttrs::Mask

Enumerator
Normal
SM_Enabled
SM_Compatible
SM_Body
SME_ABI_Routine
ZA_State_Agnostic
ZA_Shift
ZA_Mask
ZT0_Shift
ZT0_Mask

Definition at line 39 of file AArch64SMEAttributes.h.

StateValue

enum class llvm::SMEAttrs::StateValue

strong

Enumerator
None
In
Out
InOut
Preserved
New

Definition at line 29 of file AArch64SMEAttributes.h.

Constructor & Destructor Documentation

SMEAttrs() [1/5]

llvm::SMEAttrs::SMEAttrs ( unsigned  Mask = Normal )

inline

Definition at line 52 of file AArch64SMEAttributes.h.

References set().

SMEAttrs() [2/5]

llvm::SMEAttrs::SMEAttrs ( const Function &  F )

inline

Definition at line 53 of file AArch64SMEAttributes.h.

SMEAttrs() [3/5]

SMEAttrs::SMEAttrs

(

const CallBase &

CB

)

Definition at line 47 of file AArch64SMEAttributes.cpp.

References F, llvm::CallBase::getAttributes(), llvm::CallBase::getCalledFunction(), and set().

SMEAttrs() [4/5]

SMEAttrs::SMEAttrs

(

const AttributeList &

L

)

Definition at line 68 of file AArch64SMEAttributes.cpp.

References encodeZAState(), encodeZT0State(), In, InOut, New, Out, Preserved, SM_Body, SM_Compatible, SM_Enabled, and ZA_State_Agnostic.

SMEAttrs() [5/5]

SMEAttrs::SMEAttrs

(

StringRef

FuncName

)

Definition at line 54 of file AArch64SMEAttributes.cpp.

References encodeZAState(), In, SM_Compatible, and SME_ABI_Routine.

Member Function Documentation

decodeZAState()

static StateValue llvm::SMEAttrs::decodeZAState ( unsigned  Bitmask )

inlinestatic

Definition at line 81 of file AArch64SMEAttributes.h.

References ZA_Mask, and ZA_Shift.

Referenced by isInOutZA(), isInZA(), isNewZA(), isOutZA(), isPreservesZA(), and sharesZA().

decodeZT0State()

static StateValue llvm::SMEAttrs::decodeZT0State ( unsigned  Bitmask )

inlinestatic

Definition at line 112 of file AArch64SMEAttributes.h.

References ZT0_Mask, and ZT0_Shift.

Referenced by isInOutZT0(), isInZT0(), isNewZT0(), isOutZT0(), isPreservesZT0(), and sharesZT0().

encodeZAState()

static unsigned llvm::SMEAttrs::encodeZAState ( StateValue  S )

inlinestatic

Definition at line 84 of file AArch64SMEAttributes.h.

References ZA_Shift.

Referenced by SMEAttrs().

encodeZT0State()

static unsigned llvm::SMEAttrs::encodeZT0State ( StateValue  S )

inlinestatic

Definition at line 115 of file AArch64SMEAttributes.h.

References ZT0_Shift.

Referenced by SMEAttrs().

hasAgnosticZAInterface()

bool llvm::SMEAttrs::hasAgnosticZAInterface ( ) const

inline

Definition at line 100 of file AArch64SMEAttributes.h.

References ZA_State_Agnostic.

Referenced by llvm::AArch64::createFastISel(), hasPrivateZAInterface(), requiresPreservingAllZAState(), and set().

hasNonStreamingInterface()

bool llvm::SMEAttrs::hasNonStreamingInterface ( ) const

inline

Definition at line 69 of file AArch64SMEAttributes.h.

References hasStreamingCompatibleInterface(), and hasStreamingInterface().

Referenced by getSMCondition(), and hasNonStreamingInterfaceAndBody().

hasNonStreamingInterfaceAndBody()

bool llvm::SMEAttrs::hasNonStreamingInterfaceAndBody ( ) const

inline

Definition at line 72 of file AArch64SMEAttributes.h.

References hasNonStreamingInterface(), and hasStreamingBody().

Referenced by requiresSMChange().

hasPrivateZAInterface()

bool llvm::SMEAttrs::hasPrivateZAInterface ( ) const

inline

Definition at line 102 of file AArch64SMEAttributes.h.

References hasAgnosticZAInterface(), and hasSharedZAInterface().

hasSharedZAInterface()

bool llvm::SMEAttrs::hasSharedZAInterface ( ) const

inline

Definition at line 101 of file AArch64SMEAttributes.h.

References sharesZA(), and sharesZT0().

Referenced by hasPrivateZAInterface(), and set().

hasStreamingBody()

bool llvm::SMEAttrs::hasStreamingBody ( ) const

inline

Definition at line 61 of file AArch64SMEAttributes.h.

References SM_Body.

Referenced by llvm::AArch64TTIImpl::areInlineCompatible(), emitVGSaveRestore(), enableMultiVectorSpillFill(), getSMCondition(), hasNonStreamingInterfaceAndBody(), and hasStreamingInterfaceOrBody().

hasStreamingCompatibleInterface()

bool llvm::SMEAttrs::hasStreamingCompatibleInterface ( ) const

inline

Definition at line 66 of file AArch64SMEAttributes.h.

References SM_Compatible.

Referenced by llvm::AArch64::createFastISel(), getSMCondition(), hasNonStreamingInterface(), and set().

hasStreamingInterface()

bool llvm::SMEAttrs::hasStreamingInterface ( ) const

inline

Definition at line 62 of file AArch64SMEAttributes.h.

References SM_Enabled.

Referenced by emitVGSaveRestore(), enableMultiVectorSpillFill(), getSMCondition(), hasNonStreamingInterface(), hasStreamingInterfaceOrBody(), and set().

hasStreamingInterfaceOrBody()

bool llvm::SMEAttrs::hasStreamingInterfaceOrBody ( ) const

inline

Definition at line 63 of file AArch64SMEAttributes.h.

References hasStreamingBody(), and hasStreamingInterface().

Referenced by llvm::AArch64::createFastISel(), and requiresSMChange().

hasZAState()

bool llvm::SMEAttrs::hasZAState ( ) const

inline

Definition at line 105 of file AArch64SMEAttributes.h.

References isNewZA(), and sharesZA().

Referenced by llvm::AArch64::createFastISel(), requiresDisablingZABeforeCall(), and requiresLazySave().

hasZT0State()

bool llvm::SMEAttrs::hasZT0State ( ) const

inline

Definition at line 133 of file AArch64SMEAttributes.h.

References isNewZT0(), and sharesZT0().

Referenced by llvm::AArch64::createFastISel(), requiresDisablingZABeforeCall(), and requiresPreservingZT0().

isInOutZA()

bool llvm::SMEAttrs::isInOutZA ( ) const

inline

Definition at line 91 of file AArch64SMEAttributes.h.

References decodeZAState(), and InOut.

Referenced by set().

isInOutZT0()

bool llvm::SMEAttrs::isInOutZT0 ( ) const

inline

Definition at line 122 of file AArch64SMEAttributes.h.

References decodeZT0State(), and InOut.

Referenced by set().

isInZA()

bool llvm::SMEAttrs::isInZA ( ) const

inline

Definition at line 89 of file AArch64SMEAttributes.h.

References decodeZAState(), and In.

Referenced by set().

isInZT0()

bool llvm::SMEAttrs::isInZT0 ( ) const

inline

Definition at line 120 of file AArch64SMEAttributes.h.

References decodeZT0State(), and In.

Referenced by set().

isNewZA()

bool llvm::SMEAttrs::isNewZA ( ) const

inline

Definition at line 88 of file AArch64SMEAttributes.h.

References decodeZAState(), and New.

Referenced by llvm::AArch64TTIImpl::areInlineCompatible(), hasZAState(), and set().

isNewZT0()

bool llvm::SMEAttrs::isNewZT0 ( ) const

inline

Definition at line 119 of file AArch64SMEAttributes.h.

References decodeZT0State(), and New.

Referenced by llvm::AArch64TTIImpl::areInlineCompatible(), hasZT0State(), and set().

isOutZA()

bool llvm::SMEAttrs::isOutZA ( ) const

inline

Definition at line 90 of file AArch64SMEAttributes.h.

References decodeZAState(), and Out.

Referenced by set().

isOutZT0()

bool llvm::SMEAttrs::isOutZT0 ( ) const

inline

Definition at line 121 of file AArch64SMEAttributes.h.

References decodeZT0State(), and Out.

Referenced by set().

isPreservesZA()

bool llvm::SMEAttrs::isPreservesZA ( ) const

inline

Definition at line 92 of file AArch64SMEAttributes.h.

References decodeZAState(), and Preserved.

Referenced by set().

isPreservesZT0()

bool llvm::SMEAttrs::isPreservesZT0 ( ) const

inline

Definition at line 125 of file AArch64SMEAttributes.h.

References decodeZT0State(), and Preserved.

Referenced by set().

requiresDisablingZABeforeCall()

bool llvm::SMEAttrs::requiresDisablingZABeforeCall ( const SMEAttrs &  Callee ) const

inline

Definition at line 138 of file AArch64SMEAttributes.h.

References hasZAState(), hasZT0State(), and SME_ABI_Routine.

Referenced by requiresEnablingZAAfterCall().

requiresEnablingZAAfterCall()

bool llvm::SMEAttrs::requiresEnablingZAAfterCall ( const SMEAttrs &  Callee ) const

inline

Definition at line 142 of file AArch64SMEAttributes.h.

References requiresDisablingZABeforeCall(), and requiresLazySave().

requiresLazySave()

bool llvm::SMEAttrs::requiresLazySave ( const SMEAttrs &  Callee ) const

inline

Definition at line 106 of file AArch64SMEAttributes.h.

References hasZAState(), and SME_ABI_Routine.

Referenced by requiresEnablingZAAfterCall().

requiresPreservingAllZAState()

bool llvm::SMEAttrs::requiresPreservingAllZAState ( const SMEAttrs &  Callee ) const

inline

Definition at line 145 of file AArch64SMEAttributes.h.

References hasAgnosticZAInterface(), and SME_ABI_Routine.

requiresPreservingZT0()

bool llvm::SMEAttrs::requiresPreservingZT0 ( const SMEAttrs &  Callee ) const

inline

Definition at line 134 of file AArch64SMEAttributes.h.

References hasZT0State().

requiresSMChange()

bool SMEAttrs::requiresSMChange

(

const SMEAttrs &

Callee

)

const

Returns

true if a call from Caller -> Callee requires a change in streaming mode.

Definition at line 100 of file AArch64SMEAttributes.cpp.

References hasNonStreamingInterfaceAndBody(), and hasStreamingInterfaceOrBody().

Referenced by llvm::AArch64TTIImpl::getInlineCallPenalty().

set()

void SMEAttrs::set	(	unsigned	M,
		bool	Enable = true
	)

Definition at line 15 of file AArch64SMEAttributes.cpp.

References assert(), llvm::Enable, hasAgnosticZAInterface(), hasSharedZAInterface(), hasStreamingCompatibleInterface(), hasStreamingInterface(), isInOutZA(), isInOutZT0(), isInZA(), isInZT0(), isNewZA(), isNewZT0(), isOutZA(), isOutZT0(), isPreservesZA(), isPreservesZT0(), sharesZA(), sharesZT0(), and SME_ABI_Routine.

Referenced by llvm::AArch64TTIImpl::areInlineCompatible(), and SMEAttrs().

sharesZA()

bool llvm::SMEAttrs::sharesZA ( ) const

inline

Definition at line 95 of file AArch64SMEAttributes.h.

References decodeZAState(), In, InOut, Out, and Preserved.

Referenced by hasSharedZAInterface(), hasZAState(), and set().

sharesZT0()

bool llvm::SMEAttrs::sharesZT0 ( ) const

inline

Definition at line 128 of file AArch64SMEAttributes.h.

References decodeZT0State(), In, InOut, Out, and Preserved.

Referenced by hasSharedZAInterface(), hasZT0State(), and set().

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

• lib/Target/AArch64/Utils/AArch64SMEAttributes.h
• lib/Target/AArch64/Utils/AArch64SMEAttributes.cpp