class BaseIndexOffset

Declaration

class BaseIndexOffset { /* full declaration omitted */ };

Description

Helper struct to parse and store a memory address as base + index + offset. We ignore sign extensions when it is safe to do so. The following two expressions are not equivalent. To differentiate we need to store whether there was a sign extension involved in the index computation. (load (i64 add (i64 copyfromreg %c) (i64 signextend (add (i8 load %index) (i8 1)))) vs (load (i64 add (i64 copyfromreg %c) (i64 signextend (i32 add (i32 signextend (i8 load %index)) (i32 1)))))

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:32

Method Overview

• public BaseIndexOffset()
• public BaseIndexOffset(llvm::SDValue Base, llvm::SDValue Index, bool IsIndexSignExt)
• public BaseIndexOffset(llvm::SDValue Base, llvm::SDValue Index, int64_t Offset, bool IsIndexSignExt)
• public static bool computeAliasing(const llvm::SDNode * Op0, const Optional<int64_t> NumBytes0, const llvm::SDNode * Op1, const Optional<int64_t> NumBytes1, const llvm::SelectionDAG & DAG, bool & IsAlias)
• public bool contains(const llvm::SelectionDAG & DAG, int64_t BitSize, const llvm::BaseIndexOffset & Other, int64_t OtherBitSize, int64_t & BitOffset) const
• public bool contains(const llvm::SelectionDAG & DAG, int64_t BitSize, const llvm::BaseIndexOffset & Other, int64_t OtherBitSize) const
• public void dump() const
• public bool equalBaseIndex(const llvm::BaseIndexOffset & Other, const llvm::SelectionDAG & DAG, int64_t & Off) const
• public bool equalBaseIndex(const llvm::BaseIndexOffset & Other, const llvm::SelectionDAG & DAG) const
• public llvm::SDValue getBase()
• public llvm::SDValue getBase() const
• public llvm::SDValue getIndex()
• public llvm::SDValue getIndex() const
• public bool hasValidOffset() const
• public static llvm::BaseIndexOffset match(const llvm::SDNode * N, const llvm::SelectionDAG & DAG)
• public void print(llvm::raw_ostream & OS) const

Methods

¶BaseIndexOffset()

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:40

¶BaseIndexOffset(llvm::SDValue Base,
                llvm::SDValue Index,
                bool IsIndexSignExt)

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:41

Parameters

llvm::SDValue Base

llvm::SDValue Index

bool IsIndexSignExt

¶BaseIndexOffset(llvm::SDValue Base,
                llvm::SDValue Index,
                int64_t Offset,
                bool IsIndexSignExt)

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:43

Parameters

llvm::SDValue Base

llvm::SDValue Index

int64_t Offset

bool IsIndexSignExt

¶static bool computeAliasing(
    const llvm::SDNode* Op0,
    const Optional<int64_t> NumBytes0,
    const llvm::SDNode* Op1,
    const Optional<int64_t> NumBytes1,
    const llvm::SelectionDAG& DAG,
    bool& IsAlias)

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:80

Parameters

const llvm::SDNode* Op0

const Optional<int64_t> NumBytes0

const llvm::SDNode* Op1

const Optional<int64_t> NumBytes1

const llvm::SelectionDAG& DAG

bool& IsAlias

¶bool contains(const llvm::SelectionDAG& DAG,
              int64_t BitSize,
              const llvm::BaseIndexOffset& Other,
              int64_t OtherBitSize,
              int64_t& BitOffset) const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:68

Parameters

const llvm::SelectionDAG& DAG

int64_t BitSize

const llvm::BaseIndexOffset& Other

int64_t OtherBitSize

int64_t& BitOffset

¶bool contains(const llvm::SelectionDAG& DAG,
              int64_t BitSize,
              const llvm::BaseIndexOffset& Other,
              int64_t OtherBitSize) const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:72

Parameters

const llvm::SelectionDAG& DAG

int64_t BitSize

const llvm::BaseIndexOffset& Other

int64_t OtherBitSize

¶void dump() const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:90

¶bool equalBaseIndex(
    const llvm::BaseIndexOffset& Other,
    const llvm::SelectionDAG& DAG,
    int64_t& Off) const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:57

Parameters

const llvm::BaseIndexOffset& Other

const llvm::SelectionDAG& DAG

int64_t& Off

¶bool equalBaseIndex(
    const llvm::BaseIndexOffset& Other,
    const llvm::SelectionDAG& DAG) const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:60

Parameters

const llvm::BaseIndexOffset& Other

const llvm::SelectionDAG& DAG

¶llvm::SDValue getBase()

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:48

¶llvm::SDValue getBase() const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:49

¶llvm::SDValue getIndex()

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:50

¶llvm::SDValue getIndex() const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:51

¶bool hasValidOffset() const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:52

¶static llvm::BaseIndexOffset match(
    const llvm::SDNode* N,
    const llvm::SelectionDAG& DAG)

Description

Parses tree in N for base, index, offset addresses.

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:87

Parameters

const llvm::SDNode* N

const llvm::SelectionDAG& DAG

¶void print(llvm::raw_ostream& OS) const

Declared at: llvm/include/llvm/CodeGen/SelectionDAGAddressAnalysis.h:89

Parameters

llvm::raw_ostream& OS