llvm::MCExpr Class Reference

#include <MCExpr.h>

Inheritance diagram for llvm::MCExpr:

Public Types
enum	ExprKind {   Binary, Constant, SymbolRef, Unary,   Target }

Public Member Functions
Accessors
ExprKind	getKind () const
Utility Methods
void	print (raw_ostream &OS) const
void	dump () const
Expression Evaluation
bool	EvaluateAsAbsolute (int64_t &Res, const MCAsmLayout &Layout, const SectionAddrMap &Addrs) const
bool	EvaluateAsAbsolute (int64_t &Res) const
bool	EvaluateAsAbsolute (int64_t &Res, const MCAssembler &Asm) const
bool	EvaluateAsAbsolute (int64_t &Res, const MCAsmLayout &Layout) const
bool	EvaluateAsRelocatable (MCValue &Res, const MCAsmLayout &Layout) const
const MCSection *	FindAssociatedSection () const

Protected Member Functions
	MCExpr (ExprKind _Kind)
bool	EvaluateAsRelocatableImpl (MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, const SectionAddrMap *Addrs, bool InSet) const

Detailed Description

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

Definition at line 31 of file MCExpr.h.

Member Enumeration Documentation

enum llvm::MCExpr::ExprKind

Enumerator
Binary	Binary expressions.
Constant	Constant expressions.
SymbolRef	References to labels and assigned expressions.
Unary	Unary expressions.
Target	Target specific expression.

Definition at line 33 of file MCExpr.h.

Constructor & Destructor Documentation

llvm::MCExpr::MCExpr ( ExprKind  _Kind )

inlineexplicitprotected

Definition at line 51 of file MCExpr.h.

Member Function Documentation

void MCExpr::dump

(

)

const

Definition at line 134 of file MCExpr.cpp.

bool MCExpr::EvaluateAsAbsolute	(	int64_t &	Res,
		const MCAsmLayout &	Layout,
		const SectionAddrMap &	Addrs
	)		const

EvaluateAsAbsolute - Try to evaluate the expression to an absolute value.

Parameters

Res	- The absolute value, if evaluation succeeds.
Layout	- The assembler layout object to use for evaluating symbol values. If not given, then only non-symbolic expressions will be evaluated.

Returns

- True on success.

Definition at line 430 of file MCExpr.cpp.

bool MCExpr::EvaluateAsAbsolute

(

int64_t &

Res

)

const

Definition at line 421 of file MCExpr.cpp.

bool MCExpr::EvaluateAsAbsolute	(	int64_t &	Res,
		const MCAssembler &	Asm
	)		const

Definition at line 436 of file MCExpr.cpp.

bool MCExpr::EvaluateAsAbsolute	(	int64_t &	Res,
		const MCAsmLayout &	Layout
	)		const

Definition at line 425 of file MCExpr.cpp.

bool MCExpr::EvaluateAsRelocatable	(	MCValue &	Res,
		const MCAsmLayout &	Layout
	)		const

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

Parameters

Res	- The relocatable value, if evaluation succeeds.
Layout	- The assembler layout object to use for evaluating values.

Returns

- True on success.

Definition at line 603 of file MCExpr.cpp.

References EvaluateAsRelocatableImpl(), and llvm::MCAsmLayout::getAssembler().

Referenced by llvm::PPCMCExpr::EvaluateAsRelocatableImpl(), llvm::AArch64MCExpr::EvaluateAsRelocatableImpl(), llvm::MachObjectWriter::getSymbolAddress(), llvm::MCAsmLayout::getSymbolOffset(), and llvm::MachObjectWriter::markAbsoluteVariableSymbols().

bool MCExpr::EvaluateAsRelocatableImpl ( MCValue &  Res, const MCAssembler *  Asm, const MCAsmLayout *  Layout, const SectionAddrMap *  Addrs, bool  InSet  ) const

protected

-(a - b + const) ==> (b - a - const)

Definition at line 609 of file MCExpr.cpp.

References llvm::MCBinaryExpr::Add, llvm::MCBinaryExpr::And, llvm::MCBinaryExpr::Div, llvm::MCBinaryExpr::EQ, EvaluateAsRelocatableImpl(), EvaluateSymbolicAdd(), llvm::MCValue::get(), getKind(), llvm::MCSymbolRefExpr::getKind(), llvm::MCBinaryExpr::getLHS(), llvm::MCUnaryExpr::getOpcode(), llvm::MCBinaryExpr::getOpcode(), llvm::MCBinaryExpr::getRHS(), llvm::MCUnaryExpr::getSubExpr(), llvm::MCValue::getSymA(), llvm::MCValue::getSymB(), llvm::MCSymbolRefExpr::getSymbol(), llvm::MCBinaryExpr::GT, llvm::MCBinaryExpr::GTE, llvm::MCBinaryExpr::LAnd, llvm_unreachable, llvm::MCUnaryExpr::LNot, llvm::MCBinaryExpr::LOr, llvm::MCBinaryExpr::LT, llvm::MCBinaryExpr::LTE, llvm::MCUnaryExpr::Minus, llvm::MCBinaryExpr::Mod, llvm::MCBinaryExpr::Mul, llvm::MCBinaryExpr::NE, llvm::MCUnaryExpr::Not, llvm::MCBinaryExpr::Or, llvm::MCUnaryExpr::Plus, llvm::AArch64ISD::Ret, llvm::MCBinaryExpr::Shl, llvm::MCBinaryExpr::Shr, llvm::MCBinaryExpr::Sub, Unary, llvm::MCSymbolRefExpr::VK_None, and llvm::MCBinaryExpr::Xor.

Referenced by EvaluateAsRelocatable(), and EvaluateAsRelocatableImpl().

const MCSection * MCExpr::FindAssociatedSection

(

)

const

FindAssociatedSection - 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.

Definition at line 743 of file MCExpr.cpp.

References FindAssociatedSection(), getKind(), llvm::MCBinaryExpr::getLHS(), llvm::MCBinaryExpr::getRHS(), llvm::MCSymbol::getSection(), llvm::MCSymbolRefExpr::getSymbol(), llvm_unreachable, and Unary.

Referenced by llvm::ARMMCExpr::FindAssociatedSection(), llvm::PPCMCExpr::FindAssociatedSection(), FindAssociatedSection(), llvm::AArch64MCExpr::FindAssociatedSection(), and llvm::MCSymbol::setVariableValue().

ExprKind llvm::MCExpr::getKind ( ) const

inline

Definition at line 61 of file MCExpr.h.

Referenced by llvm::MCObjectStreamer::AddValueSymbols(), AddValueSymbols_(), AddValueSymbolsImpl(), llvm::MCSymbol::AliasedSymbol(), llvm::ARMMCExpr::classof(), llvm::NVPTXFloatMCExpr::classof(), llvm::PPCMCExpr::classof(), llvm::MCConstantExpr::classof(), llvm::AArch64MCExpr::classof(), llvm::MCSymbolRefExpr::classof(), llvm::MCUnaryExpr::classof(), llvm::MCBinaryExpr::classof(), llvm::MCTargetExpr::classof(), EvaluateAsPCRel(), EvaluateAsRelocatableImpl(), FindAssociatedSection(), fixELFSymbolsInTLSFixupsImpl(), HasSecRelSymbolRef(), isUsedIn(), llvm::MipsGetSymAndOffset(), print(), llvm::ARMMCExpr::PrintImpl(), llvm::AArch64MCExpr::PrintImpl(), and StartsWithGlobalOffsetTable().

void MCExpr::print

(

raw_ostream &

OS

)

const

Definition at line 31 of file MCExpr.cpp.

References llvm::MCBinaryExpr::Add, llvm::MCBinaryExpr::And, Binary, Constant, llvm::MCBinaryExpr::Div, llvm::MCBinaryExpr::EQ, getKind(), llvm::MCSymbolRefExpr::getKind(), llvm::MCBinaryExpr::getLHS(), llvm::MCSymbol::getName(), llvm::MCUnaryExpr::getOpcode(), llvm::MCBinaryExpr::getOpcode(), llvm::MCBinaryExpr::getRHS(), llvm::MCUnaryExpr::getSubExpr(), llvm::MCSymbolRefExpr::getSymbol(), llvm::MCSymbolRefExpr::getVariantKindName(), llvm::MCBinaryExpr::GT, llvm::MCUnaryExpr::LNot, llvm::MCUnaryExpr::Minus, llvm::MCUnaryExpr::Not, llvm::MCUnaryExpr::Plus, SymbolRef, Target, Unary, llvm::MCSymbolRefExpr::VK_ARM_GOT, llvm::MCSymbolRefExpr::VK_ARM_GOTOFF, llvm::MCSymbolRefExpr::VK_ARM_GOTTPOFF, llvm::MCSymbolRefExpr::VK_ARM_NONE, llvm::MCSymbolRefExpr::VK_ARM_PLT, llvm::MCSymbolRefExpr::VK_ARM_PREL31, llvm::MCSymbolRefExpr::VK_ARM_TARGET1, llvm::MCSymbolRefExpr::VK_ARM_TARGET2, llvm::MCSymbolRefExpr::VK_ARM_TLSGD, llvm::MCSymbolRefExpr::VK_ARM_TPOFF, and llvm::MCSymbolRefExpr::VK_None.

Referenced by llvm::operator<<(), llvm::MCValue::print(), llvm::DIEExpr::print(), llvm::ARMMCExpr::PrintImpl(), llvm::PPCMCExpr::PrintImpl(), and llvm::AArch64MCExpr::PrintImpl().

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

• MCExpr.h
• MCExpr.cpp