class MCWasmStreamer

Declaration

class MCWasmStreamer : public MCObjectStreamer { /* full declaration omitted */ };

Description

Streaming object file generation interface. This class provides an implementation of the MCStreamer interface which is suitable for use with the assembler backend. Specific object file formats are expected to subclass this interface to implement directives specific to that file format or custom semantics expected by the object writer implementation.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:23

Inherits from: MCObjectStreamer

Member Variables

private bool SeenIdent

Method Overview

• public MCWasmStreamer(llvm::MCContext & Context, std::unique_ptr<MCAsmBackend> TAB, std::unique_ptr<MCObjectWriter> OW, std::unique_ptr<MCCodeEmitter> Emitter)
• public void changeSection(llvm::MCSection * Section, const llvm::MCExpr * Subsection)
• public void emitAssemblerFlag(llvm::MCAssemblerFlag Flag)
• public void emitCommonSymbol(llvm::MCSymbol * Symbol, uint64_t Size, unsigned int ByteAlignment)
• public void emitELFSize(llvm::MCSymbol * Symbol, const llvm::MCExpr * Value)
• public void emitIdent(llvm::StringRef IdentString)
• private void emitInstToData(const llvm::MCInst & Inst, const llvm::MCSubtargetInfo &)
• private void emitInstToFragment(const llvm::MCInst & Inst, const llvm::MCSubtargetInfo &)
• public void emitLabel(llvm::MCSymbol * Symbol, llvm::SMLoc Loc = llvm::SMLoc())
• public void emitLabelAtPos(llvm::MCSymbol * Symbol, llvm::SMLoc Loc, llvm::MCFragment * F, uint64_t Offset)
• public void emitLocalCommonSymbol(llvm::MCSymbol * Symbol, uint64_t Size, unsigned int ByteAlignment)
• public bool emitSymbolAttribute(llvm::MCSymbol * Symbol, llvm::MCSymbolAttr Attribute)
• public void emitSymbolDesc(llvm::MCSymbol * Symbol, unsigned int DescValue)
• public void emitTBSSSymbol(llvm::MCSection * Section, llvm::MCSymbol * Symbol, uint64_t Size, unsigned int ByteAlignment = 0)
• public void emitThumbFunc(llvm::MCSymbol * Func)
• public void emitWeakReference(llvm::MCSymbol * Alias, const llvm::MCSymbol * Symbol)
• public void emitZerofill(llvm::MCSection * Section, llvm::MCSymbol * Symbol = nullptr, uint64_t Size = 0, unsigned int ByteAlignment = 0, llvm::SMLoc Loc = llvm::SMLoc())
• public void finishImpl()
• private void fixSymbolsInTLSFixups(const llvm::MCExpr * expr)
• private void mergeFragment(llvm::MCDataFragment *, llvm::MCDataFragment *)
• public void reset()
• public ~MCWasmStreamer()

Inherited from MCObjectStreamer:

• protected addPendingLabel
• public changeSection
• protected changeSectionImpl
• public emitAbsoluteSymbolDiff
• public emitAbsoluteSymbolDiffAsULEB128
• public emitAddrsig
• public emitAddrsigSym
• public emitAssignment
• public emitBundleAlignMode
• public emitBundleLock
• public emitBundleUnlock
• public emitBytes
• public emitCFISections
• public emitCVDefRangeDirective
• public emitCVFileChecksumOffsetDirective
• public emitCVFileChecksumsDirective
• public emitCVInlineLinetableDirective
• public emitCVLinetableDirective
• public emitCVLocDirective
• public emitCVStringTableDirective
• public emitCodeAlignment
• public emitConditionalAssignment
• public emitDTPRel32Value
• public emitDTPRel64Value
• public emitDwarfAdvanceFrameAddr
• public emitDwarfAdvanceLineAddr
• public emitDwarfLineEndEntry
• public emitDwarfLocDirective
• public emitFileDirective
• public emitFileDirective
• public emitFill
• public emitFill
• public emitFrames
• public emitGPRel32Value
• public emitGPRel64Value
• public emitInstToFragment
• public emitInstruction
• public emitLabel
• public emitLabelAtPos
• public emitNops
• public emitPendingAssignments
• public emitRelocDirective
• public emitSLEB128Value
• public emitTPRel32Value
• public emitTPRel64Value
• public emitULEB128Value
• public emitValueImpl
• public emitValueToAlignment
• public emitValueToOffset
• public emitWeakReference
• public finishImpl
• public flushPendingLabels
• protected flushPendingLabels
• public getAssembler
• public getAssemblerPtr
• public getCurrentFragment
• public getOrCreateDataFragment
• public insert
• public isIntegratedAssemblerRequired
• public mayHaveInstructions
• public reset
• public visitUsedSymbol

Inherited from MCStreamer:

• public AddComment
• public EnsureValidWinFrameInfo
• public addBlankLine
• public addExplicitComment
• public assignFragment
• public beginCOFFSymbolDef
• public changeSection
• protected checkCVLocSection
• public doFinalizationAtSectionEnd
• public emitAbsoluteSymbolDiff
• public emitAbsoluteSymbolDiffAsULEB128
• public emitAddrsig
• public emitAddrsigSym
• public emitAssemblerFlag
• public emitAssignment
• public emitBinaryData
• public emitBuildVersion
• public emitBundleAlignMode
• public emitBundleLock
• public emitBundleUnlock
• public emitBytes
• public emitCFIAdjustCfaOffset
• public emitCFIBKeyFrame
• public emitCFIDefCfa
• public emitCFIDefCfaOffset
• public emitCFIDefCfaRegister
• public emitCFIEndProc
• protected emitCFIEndProcImpl
• public emitCFIEscape
• public emitCFIGnuArgsSize
• public emitCFILLVMDefAspaceCfa
• public emitCFILabel
• public emitCFILsda
• public emitCFIMTETaggedFrame
• public emitCFINegateRAState
• public emitCFIOffset
• public emitCFIPersonality
• public emitCFIRegister
• public emitCFIRelOffset
• public emitCFIRememberState
• public emitCFIRestore
• public emitCFIRestoreState
• public emitCFIReturnColumn
• public emitCFISameValue
• public emitCFISections
• public emitCFISignalFrame
• public emitCFIStartProc
• protected emitCFIStartProcImpl
• public emitCFIUndefined
• public emitCFIWindowSave
• public emitCGProfileEntry
• public emitCOFFImgRel32
• public emitCOFFSafeSEH
• public emitCOFFSecRel32
• public emitCOFFSectionIndex
• public emitCOFFSymbolIndex
• public emitCOFFSymbolStorageClass
• public emitCOFFSymbolType
• public emitCVDefRangeDirective
• public emitCVDefRangeDirective
• public emitCVDefRangeDirective
• public emitCVDefRangeDirective
• public emitCVDefRangeDirective
• public emitCVFPOData
• public emitCVFileChecksumOffsetDirective
• public emitCVFileChecksumsDirective
• public emitCVFileDirective
• public emitCVFuncIdDirective
• public emitCVInlineLinetableDirective
• public emitCVInlineSiteIdDirective
• public emitCVLinetableDirective
• public emitCVLocDirective
• public emitCVStringTableDirective
• public emitCodeAlignment
• public emitCommonSymbol
• public emitConditionalAssignment
• public emitDTPRel32Value
• public emitDTPRel64Value
• public emitDarwinTargetVariantBuildVersion
• public emitDataRegion
• public emitDwarfAdvanceLineAddr
• public emitDwarfFile0Directive
• public emitDwarfFileDirective
• public emitDwarfLineEndEntry
• public emitDwarfLineStartLabel
• public emitDwarfLocDirective
• public emitDwarfUnitLength
• public emitDwarfUnitLength
• public emitEHSymAttributes
• public emitELFSize
• public emitELFSymverDirective
• public emitExplicitComments
• public emitFileDirective
• public emitFileDirective
• public emitFill
• public emitFill
• public emitFill
• public emitGNUAttribute
• public emitGPRel32Value
• public emitGPRel64Value
• public emitIdent
• public emitInstruction
• public emitInt16
• public emitInt32
• public emitInt64
• public emitInt8
• public emitIntValue
• public emitIntValue
• public emitIntValueInHex
• public emitIntValueInHexWithPadding
• public emitLOHDirective
• public emitLabel
• public emitLinkerOptions
• public emitLocalCommonSymbol
• public emitNops
• public emitPseudoProbe
• public emitRawComment
• public emitRawText
• protected emitRawTextImpl
• public emitRelocDirective
• public emitSLEB128IntValue
• public emitSLEB128Value
• public emitSymbolAttribute
• public emitSymbolDesc
• public emitSymbolValue
• public emitSyntaxDirective
• public emitTBSSSymbol
• public emitTPRel32Value
• public emitTPRel64Value
• public emitThumbFunc
• public emitULEB128IntValue
• public emitULEB128Value
• public emitValue
• public emitValueImpl
• public emitValueToAlignment
• public emitValueToOffset
• public emitVersionForTarget
• public emitVersionMin
• public emitWeakReference
• public emitWinCFIAllocStack
• public emitWinCFIEndChained
• public emitWinCFIEndProc
• public emitWinCFIEndProlog
• public emitWinCFIFuncletOrFuncEnd
• public emitWinCFIPushFrame
• public emitWinCFIPushReg
• public emitWinCFISaveReg
• public emitWinCFISaveXMM
• public emitWinCFISetFrame
• public emitWinCFIStartChained
• public emitWinCFIStartProc
• public emitWinEHHandler
• public emitWinEHHandlerData
• protected emitWindowsUnwindTables
• protected emitWindowsUnwindTables
• public emitXCOFFLocalCommonSymbol
• public emitXCOFFRefDirective
• public emitXCOFFRenameDirective
• public emitXCOFFSymbolLinkageWithVisibility
• public emitZerofill
• public emitZeros
• public endCOFFSymbolDef
• public endSection
• public finish
• public finishImpl
• public generateCompactUnwindEncodings
• public getAllowAutoPadding
• public getAssemblerPtr
• public getAssociatedPDataSection
• public getAssociatedXDataSection
• public getCommentOS
• public getContext
• public getCurrentSection
• public getCurrentSectionOnly
• protected getCurrentWinFrameInfo
• public getDwarfFrameInfos
• public getDwarfLineTableSymbol
• public getMnemonic
• public getNumFrameInfos
• public getNumWinFrameInfos
• public getPreviousSection
• public getStartTokLoc
• public getSymbolOrder
• public getTargetStreamer
• public getUseAssemblerInfoForParsing
• public getWinFrameInfos
• public hasRawTextSupport
• public hasUnfinishedDwarfFrameInfo
• public initSections
• public isIntegratedAssemblerRequired
• public isVerboseAsm
• public mayHaveInstructions
• public maybeEmitDwarf64Mark
• public popSection
• public pushSection
• public reset
• public setAllowAutoPadding
• public setStartTokLocPtr
• public setTargetStreamer
• public setUseAssemblerInfoForParsing
• public subSection
• public switchSection
• public switchSectionNoChange
• public tryEmitDwarfFileDirective
• public visitUsedExpr
• public visitUsedSymbol

Methods

¶MCWasmStreamer(
    llvm::MCContext& Context,
    std::unique_ptr<MCAsmBackend> TAB,
    std::unique_ptr<MCObjectWriter> OW,
    std::unique_ptr<MCCodeEmitter> Emitter)

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:25

Parameters

llvm::MCContext& Context

std::unique_ptr<MCAsmBackend> TAB

std::unique_ptr<MCObjectWriter> OW

std::unique_ptr<MCCodeEmitter> Emitter

¶void changeSection(llvm::MCSection* Section,
                   const llvm::MCExpr* Subsection)

Description

@ {

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:43

Parameters

llvm::MCSection* Section

const llvm::MCExpr* Subsection

¶void emitAssemblerFlag(llvm::MCAssemblerFlag Flag)

Description

Note in the output the specified \p Flag.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:47

Parameters

llvm::MCAssemblerFlag Flag

¶void emitCommonSymbol(llvm::MCSymbol* Symbol,
                      uint64_t Size,
                      unsigned int ByteAlignment)

Description

Emit a common symbol.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:52

Parameters

llvm::MCSymbol* Symbol

- The common symbol to emit.

uint64_t Size

- The size of the common symbol.

unsigned int ByteAlignment

- The alignment of the symbol if non-zero. This must be a power of 2.

¶void emitELFSize(llvm::MCSymbol* Symbol,
                 const llvm::MCExpr* Value)

Description

Emit an ELF .size directive. This corresponds to an assembler statement such as: .size symbol, expression

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:55

Parameters

llvm::MCSymbol* Symbol

const llvm::MCExpr* Value

¶void emitIdent(llvm::StringRef IdentString)

Description

Emit the "identifiers" directive. This implements the '.ident "version foo"' assembler directive.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:66

Parameters

llvm::StringRef IdentString

¶void emitInstToData(const llvm::MCInst& Inst,
                    const llvm::MCSubtargetInfo&)

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:72

Parameters

const llvm::MCInst& Inst

const llvm::MCSubtargetInfo&

¶void emitInstToFragment(
    const llvm::MCInst& Inst,
    const llvm::MCSubtargetInfo&)

Description

Emit an instruction to a special fragment, because this instruction can change its size during relaxation.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:71

Parameters

const llvm::MCInst& Inst

const llvm::MCSubtargetInfo&

¶void emitLabel(llvm::MCSymbol* Symbol,
               llvm::SMLoc Loc = llvm::SMLoc())

Description

@ {

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:44

Parameters

llvm::MCSymbol* Symbol

llvm::SMLoc Loc = llvm::SMLoc()

¶void emitLabelAtPos(llvm::MCSymbol* Symbol,
                    llvm::SMLoc Loc,
                    llvm::MCFragment* F,
                    uint64_t Offset)

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:45

Parameters

llvm::MCSymbol* Symbol

llvm::SMLoc Loc

llvm::MCFragment* F

uint64_t Offset

¶void emitLocalCommonSymbol(
    llvm::MCSymbol* Symbol,
    uint64_t Size,
    unsigned int ByteAlignment)

Description

Emit a local common (.lcomm) symbol.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:57

Parameters

llvm::MCSymbol* Symbol

- The common symbol to emit.

uint64_t Size

- The size of the common symbol.

unsigned int ByteAlignment

- The alignment of the common symbol in bytes.

¶bool emitSymbolAttribute(
    llvm::MCSymbol* Symbol,
    llvm::MCSymbolAttr Attribute)

Description

Add the given \p Attribute to \p Symbol.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:50

Parameters

llvm::MCSymbol* Symbol

llvm::MCSymbolAttr Attribute

¶void emitSymbolDesc(llvm::MCSymbol* Symbol,
                    unsigned int DescValue)

Description

Set the \p DescValue for the \p Symbol.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:51

Parameters

llvm::MCSymbol* Symbol

- The symbol to have its n_desc field set.

unsigned int DescValue

- The value to set into the n_desc field.

¶void emitTBSSSymbol(
    llvm::MCSection* Section,
    llvm::MCSymbol* Symbol,
    uint64_t Size,
    unsigned int ByteAlignment = 0)

Description

Emit a thread local bss (.tbss) symbol.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:63

Parameters

llvm::MCSection* Section

- The thread local common section.

llvm::MCSymbol* Symbol

- The thread local common symbol to emit.

uint64_t Size

- The size of the symbol.

unsigned int ByteAlignment = 0

- The alignment of the thread local common symbol if non-zero. This must be a power of 2 on some targets.

¶void emitThumbFunc(llvm::MCSymbol* Func)

Description

Note in the output that the specified \p Func is a Thumb mode function (ARM target only).

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:48

Parameters

llvm::MCSymbol* Func

¶void emitWeakReference(
    llvm::MCSymbol* Alias,
    const llvm::MCSymbol* Symbol)

Description

Emit an weak reference from \p Alias to \p Symbol. This corresponds to an assembler statement such as: .weakref alias, symbol

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:49

Parameters

llvm::MCSymbol* Alias

- The alias that is being created.

const llvm::MCSymbol* Symbol

- The symbol being aliased.

¶void emitZerofill(
    llvm::MCSection* Section,
    llvm::MCSymbol* Symbol = nullptr,
    uint64_t Size = 0,
    unsigned int ByteAlignment = 0,
    llvm::SMLoc Loc = llvm::SMLoc())

Description

Emit the zerofill section and an optional symbol.

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:60

Parameters

llvm::MCSection* Section

- The zerofill section to create and or to put the symbol

llvm::MCSymbol* Symbol = nullptr

- The zerofill symbol to emit, if non-NULL.

uint64_t Size = 0

- The size of the zerofill symbol.

unsigned int ByteAlignment = 0

- The alignment of the zerofill symbol if non-zero. This must be a power of 2 on some targets.

llvm::SMLoc Loc = llvm::SMLoc()

¶void finishImpl()

Description

Streamer specific finalization.

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

¶void fixSymbolsInTLSFixups(
    const llvm::MCExpr* expr)

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:74

Parameters

const llvm::MCExpr* expr

¶void mergeFragment(llvm::MCDataFragment*,
                   llvm::MCDataFragment*)

Description

Merge the content of the fragment \p EF into the fragment \p DF.

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

Parameters

llvm::MCDataFragment*

llvm::MCDataFragment*

¶void reset()

Description

state management

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

¶~MCWasmStreamer()

Declared at: llvm/include/llvm/MC/MCWasmStreamer.h:32