class MCExpr

Declaration

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

Description

Base class for the full range of assembler expressions which are needed for parsing.

Declared at: llvm/include/llvm/MC/MCExpr.h:35

Method Overview

• protected MCExpr(llvm::MCExpr::ExprKind Kind, llvm::SMLoc Loc)
• public MCExpr(const llvm::MCExpr &)
• public void dump() const
• public bool evaluateAsAbsolute(int64_t & Res, const llvm::MCAsmLayout & Layout, const llvm::SectionAddrMap & Addrs) const
• public bool evaluateAsAbsolute(int64_t & Res) const
• public bool evaluateAsAbsolute(int64_t & Res, const llvm::MCAssembler & Asm) const
• public bool evaluateAsAbsolute(int64_t & Res, const llvm::MCAssembler * Asm) const
• public bool evaluateAsAbsolute(int64_t & Res, const llvm::MCAsmLayout & Layout) const
• public bool evaluateAsRelocatable(llvm::MCValue & Res, const llvm::MCAsmLayout * Layout, const llvm::MCFixup * Fixup) const
• protected bool evaluateAsRelocatableImpl(llvm::MCValue & Res, const llvm::MCAssembler * Asm, const llvm::MCAsmLayout * Layout, const llvm::MCFixup * Fixup, const llvm::SectionAddrMap * Addrs, bool InSet) const
• public bool evaluateAsValue(llvm::MCValue & Res, const llvm::MCAsmLayout & Layout) const
• public bool evaluateKnownAbsolute(int64_t & Res, const llvm::MCAsmLayout & Layout) const
• public llvm::MCFragment * findAssociatedFragment() const
• public llvm::MCExpr::ExprKind getKind() const
• public llvm::SMLoc getLoc() const
• public void print(llvm::raw_ostream & OS, const llvm::MCAsmInfo * MAI, bool InParens = false) const

Methods

¶MCExpr(llvm::MCExpr::ExprKind Kind,
       llvm::SMLoc Loc)

Declared at: llvm/include/llvm/MC/MCExpr.h:54

Parameters

llvm::MCExpr::ExprKind Kind

llvm::SMLoc Loc

¶MCExpr(const llvm::MCExpr&)

Declared at: llvm/include/llvm/MC/MCExpr.h:62

Parameters

const llvm::MCExpr&

¶void dump() const

Declared at: llvm/include/llvm/MC/MCExpr.h:77

¶bool evaluateAsAbsolute(
    int64_t& Res,
    const llvm::MCAsmLayout& Layout,
    const llvm::SectionAddrMap& Addrs) const

Description

Try to evaluate the expression to an absolute value.

Declared at: llvm/include/llvm/MC/MCExpr.h:90

Parameters

int64_t& Res

- The absolute value, if evaluation succeeds.

const llvm::MCAsmLayout& Layout

- The assembler layout object to use for evaluating symbol values. If not given, then only non-symbolic expressions will be evaluated.

const llvm::SectionAddrMap& Addrs

Returns

- True on success.

¶bool evaluateAsAbsolute(int64_t& Res) const

Declared at: llvm/include/llvm/MC/MCExpr.h:92

Parameters

int64_t& Res

¶bool evaluateAsAbsolute(
    int64_t& Res,
    const llvm::MCAssembler& Asm) const

Declared at: llvm/include/llvm/MC/MCExpr.h:93

Parameters

int64_t& Res

const llvm::MCAssembler& Asm

¶bool evaluateAsAbsolute(
    int64_t& Res,
    const llvm::MCAssembler* Asm) const

Declared at: llvm/include/llvm/MC/MCExpr.h:94

Parameters

int64_t& Res

const llvm::MCAssembler* Asm

¶bool evaluateAsAbsolute(
    int64_t& Res,
    const llvm::MCAsmLayout& Layout) const

Declared at: llvm/include/llvm/MC/MCExpr.h:95

Parameters

int64_t& Res

const llvm::MCAsmLayout& Layout

¶bool evaluateAsRelocatable(
    llvm::MCValue& Res,
    const llvm::MCAsmLayout* Layout,
    const llvm::MCFixup* Fixup) const

Description

Try to evaluate the expression to a relocatable value, i.e. an expression of the fixed form (a - b + constant).

Declared at: llvm/include/llvm/MC/MCExpr.h:106

Parameters

llvm::MCValue& Res

- The relocatable value, if evaluation succeeds.

const llvm::MCAsmLayout* Layout

- The assembler layout object to use for evaluating values.

const llvm::MCFixup* Fixup

- The Fixup object if available.

Returns

- True on success.

¶bool evaluateAsRelocatableImpl(
    llvm::MCValue& Res,
    const llvm::MCAssembler* Asm,
    const llvm::MCAsmLayout* Layout,
    const llvm::MCFixup* Fixup,
    const llvm::SectionAddrMap* Addrs,
    bool InSet) const

Declared at: llvm/include/llvm/MC/MCExpr.h:56

Parameters

llvm::MCValue& Res

const llvm::MCAssembler* Asm

const llvm::MCAsmLayout* Layout

const llvm::MCFixup* Fixup

const llvm::SectionAddrMap* Addrs

bool InSet

¶bool evaluateAsValue(
    llvm::MCValue& Res,
    const llvm::MCAsmLayout& Layout) const

Description

Try to evaluate the expression to the form (a - b + constant) where neither a nor b are variables. This is a more aggressive variant of evaluateAsRelocatable. The intended use is for when relocations are not available, like the .size directive.

Declared at: llvm/include/llvm/MC/MCExpr.h:114

Parameters

llvm::MCValue& Res

const llvm::MCAsmLayout& Layout

¶bool evaluateKnownAbsolute(
    int64_t& Res,
    const llvm::MCAsmLayout& Layout) const

Declared at: llvm/include/llvm/MC/MCExpr.h:97

Parameters

int64_t& Res

const llvm::MCAsmLayout& Layout

¶llvm::MCFragment* findAssociatedFragment() const

Description

Find the "associated section" for this expression, which is currently defined as the absolute section for constants, or otherwise the section associated with the first defined symbol in the expression.

Declared at: llvm/include/llvm/MC/MCExpr.h:120

¶llvm::MCExpr::ExprKind getKind() const

Description

@ {

Declared at: llvm/include/llvm/MC/MCExpr.h:68

¶llvm::SMLoc getLoc() const

Declared at: llvm/include/llvm/MC/MCExpr.h:69

¶void print(llvm::raw_ostream& OS,
           const llvm::MCAsmInfo* MAI,
           bool InParens = false) const

Description

@ } @ {

Declared at: llvm/include/llvm/MC/MCExpr.h:75

Parameters

llvm::raw_ostream& OS

const llvm::MCAsmInfo* MAI

bool InParens = false