LLVM 22.0.0git
llvm::AAMDNodes Struct Reference

A collection of metadata nodes that might be associated with a memory access used by the alias-analysis infrastructure. More...

#include "llvm/IR/Metadata.h"

Public Member Functions

 AAMDNodes ()=default
 AAMDNodes (MDNode *T, MDNode *TS, MDNode *S, MDNode *N, MDNode *NAS)
bool operator== (const AAMDNodes &A) const
bool operator!= (const AAMDNodes &A) const
 operator bool () const
AAMDNodes intersect (const AAMDNodes &Other) const
 Given two sets of AAMDNodes that apply to the same pointer, give the best AAMDNodes that are compatible with both (i.e.
AAMDNodes shift (size_t Offset) const
 Create a new AAMDNode that describes this AAMDNode after applying a constant offset to the start of the pointer.
AAMDNodes extendTo (ssize_t Len) const
 Create a new AAMDNode that describes this AAMDNode after extending it to apply to a series of bytes of length Len.
LLVM_ABI AAMDNodes merge (const AAMDNodes &Other) const
 Given two sets of AAMDNodes applying to potentially different locations, determine the best AAMDNodes that apply to both.
LLVM_ABI AAMDNodes concat (const AAMDNodes &Other) const
 Determine the best AAMDNodes after concatenating two different locations together.
LLVM_ABI AAMDNodes adjustForAccess (unsigned AccessSize)
 Create a new AAMDNode for accessing AccessSize bytes of this AAMDNode.
LLVM_ABI AAMDNodes adjustForAccess (size_t Offset, Type *AccessTy, const DataLayout &DL)
LLVM_ABI AAMDNodes adjustForAccess (size_t Offset, unsigned AccessSize)

Static Public Member Functions

static LLVM_ABI MDNodeshiftTBAA (MDNode *M, size_t off)
static LLVM_ABI MDNodeshiftTBAAStruct (MDNode *M, size_t off)
static LLVM_ABI MDNodeextendToTBAA (MDNode *TBAA, ssize_t len)

Public Attributes

MDNodeTBAA = nullptr
 The tag for type-based alias analysis.
MDNodeTBAAStruct = nullptr
 The tag for type-based alias analysis (tbaa struct).
MDNodeScope = nullptr
 The tag for alias scope specification (used with noalias).
MDNodeNoAlias = nullptr
 The tag specifying the noalias scope.
MDNodeNoAliasAddrSpace = nullptr
 The tag specifying the noalias address spaces.

Detailed Description

A collection of metadata nodes that might be associated with a memory access used by the alias-analysis infrastructure.

Definition at line 760 of file Metadata.h.

Constructor & Destructor Documentation

◆ AAMDNodes() [1/2]

llvm::AAMDNodes::AAMDNodes ( )
explicitdefault

◆ AAMDNodes() [2/2]

llvm::AAMDNodes::AAMDNodes ( MDNode * T,
MDNode * TS,
MDNode * S,
MDNode * N,
MDNode * NAS )
inlineexplicit

Definition at line 762 of file Metadata.h.

References N, NoAlias, NoAliasAddrSpace, Scope, T, TBAA, and TBAAStruct.

Member Function Documentation

◆ adjustForAccess() [1/3]

AAMDNodes AAMDNodes::adjustForAccess ( size_t Offset,
Type * AccessTy,
const DataLayout & DL )

Definition at line 865 of file TypeBasedAliasAnalysis.cpp.

References AAMDNodes(), DL, llvm::Offset, shift(), and Size.

◆ adjustForAccess() [2/3]

AAMDNodes AAMDNodes::adjustForAccess ( size_t Offset,
unsigned AccessSize )

Definition at line 877 of file TypeBasedAliasAnalysis.cpp.

References AAMDNodes(), llvm::Offset, and shift().

◆ adjustForAccess() [3/3]

AAMDNodes AAMDNodes::adjustForAccess ( unsigned AccessSize)

Create a new AAMDNode for accessing AccessSize bytes of this AAMDNode.

If this AAMDNode has !tbaa.struct and AccessSize matches the size of the field at offset 0, get the TBAA tag describing the accessed field. If such an AAMDNode already embeds !tbaa, the existing one is retrieved. Finally, !tbaa.struct is zeroed out.

Definition at line 849 of file TypeBasedAliasAnalysis.cpp.

References AAMDNodes(), llvm::cast(), llvm::mdconst::extract(), llvm::mdconst::hasa(), and llvm::isa().

◆ concat()

AAMDNodes AAMDNodes::concat ( const AAMDNodes & Other) const

Determine the best AAMDNodes after concatenating two different locations together.

Different from merge, where different locations should overlap each other, concat puts non-overlapping locations together.

Definition at line 553 of file TypeBasedAliasAnalysis.cpp.

References AAMDNodes(), llvm::MDNode::getMostGenericAliasScope(), llvm::MDNode::getMostGenericNoaliasAddrspace(), llvm::MDNode::intersect(), NoAlias, NoAliasAddrSpace, llvm::Other, and Scope.

Referenced by foldLoadsRecursive(), and mergeConsecutivePartStores().

◆ extendTo()

AAMDNodes llvm::AAMDNodes::extendTo ( ssize_t Len) const
inline

Create a new AAMDNode that describes this AAMDNode after extending it to apply to a series of bytes of length Len.

A size of -1 denotes an unknown size.

Definition at line 833 of file Metadata.h.

References AAMDNodes(), extendToTBAA(), NoAlias, NoAliasAddrSpace, Scope, TBAA, and TBAAStruct.

◆ extendToTBAA()

◆ intersect()

AAMDNodes llvm::AAMDNodes::intersect ( const AAMDNodes & Other) const
inline

Given two sets of AAMDNodes that apply to the same pointer, give the best AAMDNodes that are compatible with both (i.e.

a set of nodes whose allowable aliasing conclusions are a subset of those allowable by both of the inputs). However, for efficiency reasons, do not create any new MDNodes.

Definition at line 806 of file Metadata.h.

References AAMDNodes(), NoAlias, NoAliasAddrSpace, llvm::Other, Scope, TBAA, and TBAAStruct.

◆ merge()

◆ operator bool()

llvm::AAMDNodes::operator bool ( ) const
inlineexplicit

Definition at line 772 of file Metadata.h.

References NoAlias, NoAliasAddrSpace, Scope, TBAA, and TBAAStruct.

◆ operator!=()

bool llvm::AAMDNodes::operator!= ( const AAMDNodes & A) const
inline

Definition at line 770 of file Metadata.h.

References A(), and AAMDNodes().

◆ operator==()

bool llvm::AAMDNodes::operator== ( const AAMDNodes & A) const
inline

Definition at line 765 of file Metadata.h.

References A(), AAMDNodes(), NoAlias, NoAliasAddrSpace, Scope, TBAA, and TBAAStruct.

◆ shift()

AAMDNodes llvm::AAMDNodes::shift ( size_t Offset) const
inline

Create a new AAMDNode that describes this AAMDNode after applying a constant offset to the start of the pointer.

Definition at line 819 of file Metadata.h.

References AAMDNodes(), NoAlias, NoAliasAddrSpace, llvm::Offset, Scope, shiftTBAA(), shiftTBAAStruct(), TBAA, and TBAAStruct.

Referenced by adjustForAccess(), and adjustForAccess().

◆ shiftTBAA()

MDNode * AAMDNodes::shiftTBAA ( MDNode * M,
size_t off )
static

Definition at line 766 of file TypeBasedAliasAnalysis.cpp.

References isStructPathTBAA(), and llvm::Offset.

Referenced by shift().

◆ shiftTBAAStruct()

Member Data Documentation

◆ NoAlias

MDNode* llvm::AAMDNodes::NoAlias = nullptr

◆ NoAliasAddrSpace

MDNode* llvm::AAMDNodes::NoAliasAddrSpace = nullptr

The tag specifying the noalias address spaces.

Definition at line 789 of file Metadata.h.

Referenced by AAMDNodes(), concat(), extendTo(), llvm::DenseMapInfo< AAMDNodes >::getHashValue(), intersect(), merge(), operator bool(), operator==(), and shift().

◆ Scope

MDNode* llvm::AAMDNodes::Scope = nullptr

The tag for alias scope specification (used with noalias).

Definition at line 783 of file Metadata.h.

Referenced by AAMDNodes(), llvm::ScopedNoAliasAAResult::alias(), concat(), extendTo(), llvm::DenseMapInfo< AAMDNodes >::getHashValue(), intersect(), merge(), operator bool(), operator==(), and shift().

◆ TBAA

◆ TBAAStruct

MDNode* llvm::AAMDNodes::TBAAStruct = nullptr

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