clang::CodeGen::ConstantEmitter Class Reference

#include "/home/buildbot/as-worker-4/publish-doxygen-docs/llvm-project/clang/lib/CodeGen/ConstantEmitter.h"

Public Member Functions
	ConstantEmitter (CodeGenModule &CGM, CodeGenFunction *CGF=nullptr)
	ConstantEmitter (CodeGenFunction &CGF)
	Initialize this emission in the context of the given function.
	ConstantEmitter (const ConstantEmitter &other)=delete
ConstantEmitter &	operator= (const ConstantEmitter &other)=delete
	~ConstantEmitter ()
bool	isAbstract () const
	Is the current emission context abstract?
bool	isInConstantContext () const
void	setInConstantContext (bool var)
llvm::Constant *	tryEmitForInitializer (const VarDecl &D)
	Try to emit the initiaizer of the given declaration as an abstract constant.
llvm::Constant *	tryEmitForInitializer (const Expr *E, LangAS destAddrSpace, QualType destType)
llvm::Constant *	emitForInitializer (const APValue &value, LangAS destAddrSpace, QualType destType)
void	finalize (llvm::GlobalVariable *global)
llvm::Constant *	tryEmitAbstractForInitializer (const VarDecl &D)
	Try to emit the initializer of the given declaration as an abstract constant.
llvm::Constant *	emitAbstract (const Expr *E, QualType T)
	Emit the result of the given expression as an abstract constant, asserting that it succeeded.
llvm::Constant *	emitAbstract (SourceLocation loc, const APValue &value, QualType T, bool EnablePtrAuthFunctionTypeDiscrimination=true)
llvm::Constant *	tryEmitAbstract (const Expr *E, QualType T)
	Try to emit the result of the given expression as an abstract constant.
llvm::Constant *	tryEmitAbstractForMemory (const Expr *E, QualType T)
llvm::Constant *	tryEmitAbstract (const APValue &value, QualType T)
llvm::Constant *	tryEmitAbstractForMemory (const APValue &value, QualType T)
llvm::Constant *	tryEmitConstantSignedPointer (llvm::Constant *Ptr, PointerAuthQualifier Auth)
	Try to emit a constant signed pointer, given a raw pointer and the destination ptrauth qualifier.
llvm::Constant *	tryEmitConstantExpr (const ConstantExpr *CE)
llvm::Constant *	emitNullForMemory (QualType T)
llvm::Constant *	emitForMemory (llvm::Constant *C, QualType T)
llvm::Constant *	tryEmitPrivateForVarInit (const VarDecl &D)
llvm::Constant *	tryEmitPrivate (const Expr *E, QualType T)
llvm::Constant *	tryEmitPrivateForMemory (const Expr *E, QualType T)
llvm::Constant *	tryEmitPrivate (const APValue &value, QualType T, bool EnablePtrAuthFunctionTypeDiscrimination=true)
llvm::Constant *	tryEmitPrivateForMemory (const APValue &value, QualType T)
llvm::GlobalValue *	getCurrentAddrPrivate ()
	Get the address of the current location.
void	registerCurrentAddrPrivate (llvm::Constant *signal, llvm::GlobalValue *placeholder)
	Register a 'signal' value with the emitter to inform it where to resolve a placeholder.

Static Public Member Functions
static llvm::Constant *	emitNullForMemory (CodeGenModule &CGM, QualType T)
static llvm::Constant *	emitForMemory (CodeGenModule &CGM, llvm::Constant *C, QualType T)

Public Attributes
CodeGenModule &	CGM
CodeGenFunction *const	CGF

Detailed Description

Definition at line 23 of file ConstantEmitter.h.

Constructor & Destructor Documentation

ConstantEmitter() [1/3]

clang::CodeGen::ConstantEmitter::ConstantEmitter ( CodeGenModule & CGM, CodeGenFunction * CGF = nullptr )

inline

Definition at line 51 of file ConstantEmitter.h.

References CGF, and CGM.

Referenced by ConstantEmitter(), and operator=().

ConstantEmitter() [2/3]

clang::CodeGen::ConstantEmitter::ConstantEmitter ( CodeGenFunction & CGF )

inline

Initialize this emission in the context of the given function.

Use this if the expression might contain contextual references like block addresses or PredefinedExprs.

Definition at line 57 of file ConstantEmitter.h.

References CGF, and CGM.

ConstantEmitter() [3/3]

clang::CodeGen::ConstantEmitter::ConstantEmitter ( const ConstantEmitter & other )

delete

References ConstantEmitter().

~ConstantEmitter()

ConstantEmitter::~ConstantEmitter

(

)

Definition at line 1843 of file CGExprConstant.cpp.

Member Function Documentation

emitAbstract() [1/2]

llvm::Constant * ConstantEmitter::emitAbstract	(	const Expr *	E,
		QualType	T )

Emit the result of the given expression as an abstract constant, asserting that it succeeded.

This is only safe to do when the expression is known to be a constant expression with either a fairly simple type or a known simple form.

Definition at line 1628 of file CGExprConstant.cpp.

References clang::C, CGM, clang::Expr::getExprLoc(), and tryEmitPrivate().

Referenced by clang::CodeGen::CodeGenModule::createOpenCLIntToSamplerConversion(), clang::CodeGen::CodeGenModule::EmitAnnotationArgs(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitDeclRefLValue(), and clang::CodeGen::CodeGenFunction::tryEmitAsConstant().

emitAbstract() [2/2]

llvm::Constant * ConstantEmitter::emitAbstract	(	SourceLocation	loc,
		const APValue &	value,
		QualType	T,
		bool	EnablePtrAuthFunctionTypeDiscrimination = true )

Definition at line 1641 of file CGExprConstant.cpp.

References clang::C, CGM, and tryEmitPrivate().

emitForInitializer()

llvm::Constant * ConstantEmitter::emitForInitializer	(	const APValue &	value,
		LangAS	destAddrSpace,
		QualType	destType )

Definition at line 1668 of file CGExprConstant.cpp.

References clang::C, and tryEmitPrivateForMemory().

emitForMemory() [1/2]

llvm::Constant * ConstantEmitter::emitForMemory ( CodeGenModule & CGM, llvm::Constant * C, QualType T )

static

Definition at line 1960 of file CGExprConstant.cpp.

References clang::C, clang::cast(), CGM, emitForMemory(), clang::Type::getAs(), clang::Type::isBitIntType(), clang::Type::isExtVectorBoolType(), clang::Type::isPackedVectorBoolType(), and clang::Type::isSignedIntegerOrEnumerationType().

emitForMemory() [2/2]

llvm::Constant * clang::CodeGen::ConstantEmitter::emitForMemory ( llvm::Constant * C, QualType T )

inline

Definition at line 125 of file ConstantEmitter.h.

References clang::C, CGM, emitForMemory(), and clang::T.

Referenced by emitForMemory(), emitForMemory(), emitNullForMemory(), tryEmitAbstractForMemory(), tryEmitAbstractForMemory(), tryEmitPrivateForMemory(), tryEmitPrivateForMemory(), and tryEmitPrivateForVarInit().

emitNullForMemory() [1/2]

llvm::Constant * ConstantEmitter::emitNullForMemory ( CodeGenModule & CGM, QualType T )

static

Definition at line 2719 of file CGExprConstant.cpp.

References CGM, emitForMemory(), and clang::T.

emitNullForMemory() [2/2]

llvm::Constant * clang::CodeGen::ConstantEmitter::emitNullForMemory ( QualType T )

inline

Definition at line 122 of file ConstantEmitter.h.

References CGM, emitNullForMemory(), and clang::T.

Referenced by clang::CodeGen::CodeGenModule::EmitNullConstant(), and emitNullForMemory().

finalize()

void ConstantEmitter::finalize

(

llvm::GlobalVariable *

global

)

Definition at line 1827 of file CGExprConstant.cpp.

References CGM.

Referenced by clang::CodeGen::CodeGenFunction::AddInitializerToStaticVarDecl(), and clang::CodeGen::CodeGenModule::GetOrCreateLLVMGlobal().

getCurrentAddrPrivate()

llvm::GlobalValue * ConstantEmitter::getCurrentAddrPrivate

(

)

Get the address of the current location.

This is a constant that will resolve, after finalization, to the address of the 'signal' value that is registered with the emitter later.

Definition at line 1677 of file CGExprConstant.cpp.

References CGM.

Referenced by tryEmitConstantSignedPointer().

isAbstract()

bool clang::CodeGen::ConstantEmitter::isAbstract ( ) const

inline

Is the current emission context abstract?

Definition at line 66 of file ConstantEmitter.h.

Referenced by tryEmitConstantSignedPointer().

isInConstantContext()

bool clang::CodeGen::ConstantEmitter::isInConstantContext ( ) const

inline

Definition at line 70 of file ConstantEmitter.h.

operator=()

ConstantEmitter & clang::CodeGen::ConstantEmitter::operator= ( const ConstantEmitter & other )

delete

References ConstantEmitter().

registerCurrentAddrPrivate()

void ConstantEmitter::registerCurrentAddrPrivate	(	llvm::Constant *	signal,
		llvm::GlobalValue *	placeholder )

Register a 'signal' value with the emitter to inform it where to resolve a placeholder.

The signal value must be unique in the initializer; it might, for example, be the address of a global that refers to the current-address value in its own initializer.

Uses of the placeholder must be properly anchored before finalizing the emitter, e.g. by being installed as the initializer of a global variable. That is, it must be possible to replaceAllUsesWith the placeholder with the proper address of the signal.

Definition at line 1697 of file CGExprConstant.cpp.

Referenced by tryEmitConstantSignedPointer().

setInConstantContext()

void clang::CodeGen::ConstantEmitter::setInConstantContext ( bool var )

inline

Definition at line 71 of file ConstantEmitter.h.

tryEmitAbstract() [1/2]

llvm::Constant * ConstantEmitter::tryEmitAbstract	(	const APValue &	value,
		QualType	T )

Definition at line 1610 of file CGExprConstant.cpp.

References clang::C, and tryEmitPrivate().

tryEmitAbstract() [2/2]

llvm::Constant * ConstantEmitter::tryEmitAbstract	(	const Expr *	E,
		QualType	T )

Try to emit the result of the given expression as an abstract constant.

Definition at line 1603 of file CGExprConstant.cpp.

References clang::C, and tryEmitPrivate().

Referenced by EmitCXXNewAllocSize(), clang::CodeGen::CodeGenFunction::EmitObjCBoxedExpr(), clang::CodeGen::CodeGenFunction::EnterSEHTryStmt(), tryEmitAbstractForMemory(), tryEmitAbstractForMemory(), and tryEmitConstantExpr().

tryEmitAbstractForInitializer()

llvm::Constant * ConstantEmitter::tryEmitAbstractForInitializer

(

const VarDecl &

D

)

Try to emit the initializer of the given declaration as an abstract constant.

Definition at line 1596 of file CGExprConstant.cpp.

References clang::C, and tryEmitPrivateForVarInit().

Referenced by clang::CodeGen::CodeGenFunction::EmitAutoVarInit(), and tryCaptureAsConstant().

tryEmitAbstractForMemory() [1/2]

llvm::Constant * ConstantEmitter::tryEmitAbstractForMemory	(	const APValue &	value,
		QualType	T )

Definition at line 1902 of file CGExprConstant.cpp.

References clang::C, CGM, emitForMemory(), getNonMemoryType(), and tryEmitAbstract().

tryEmitAbstractForMemory() [2/2]

llvm::Constant * ConstantEmitter::tryEmitAbstractForMemory	(	const Expr *	E,
		QualType	T )

Definition at line 1895 of file CGExprConstant.cpp.

References clang::C, CGM, emitForMemory(), getNonMemoryType(), and tryEmitAbstract().

Referenced by tryEmitPrivate().

tryEmitConstantExpr()

llvm::Constant * ConstantEmitter::tryEmitConstantExpr

(

const ConstantExpr *

CE

)

Definition at line 1616 of file CGExprConstant.cpp.

References CGM, clang::ConstantExpr::getAPValueResult(), clang::Expr::getType(), clang::ConstantExpr::hasAPValueResult(), clang::Expr::isGLValue(), and tryEmitAbstract().

tryEmitConstantSignedPointer()

llvm::Constant * ConstantEmitter::tryEmitConstantSignedPointer	(	llvm::Constant *	UnsignedPointer,
		PointerAuthQualifier	Schema )

Try to emit a constant signed pointer, given a raw pointer and the destination ptrauth qualifier.

This can fail if the qualifier needs address discrimination and the emitter is in an abstract mode.

Definition at line 1929 of file CGExprConstant.cpp.

References CGM, getCurrentAddrPrivate(), clang::PointerAuthQualifier::getExtraDiscriminator(), clang::PointerAuthQualifier::getKey(), clang::PointerAuthQualifier::hasKeyNone(), isAbstract(), clang::PointerAuthQualifier::isAddressDiscriminated(), and registerCurrentAddrPrivate().

tryEmitForInitializer() [1/2]

llvm::Constant * ConstantEmitter::tryEmitForInitializer	(	const Expr *	E,
		LangAS	destAddrSpace,
		QualType	destType )

Definition at line 1661 of file CGExprConstant.cpp.

References tryEmitPrivateForMemory().

tryEmitForInitializer() [2/2]

llvm::Constant * ConstantEmitter::tryEmitForInitializer

(

const VarDecl &

D

)

Try to emit the initiaizer of the given declaration as an abstract constant.

If this succeeds, the emission must be finalized.

Definition at line 1656 of file CGExprConstant.cpp.

References clang::QualType::getAddressSpace(), clang::ValueDecl::getType(), and tryEmitPrivateForVarInit().

Referenced by clang::CodeGen::CodeGenFunction::AddInitializerToStaticVarDecl(), and clang::CodeGen::CodeGenModule::GetOrCreateLLVMGlobal().

tryEmitPrivate() [1/2]

llvm::Constant * ConstantEmitter::tryEmitPrivate	(	const APValue &	value,
		QualType	T,
		bool	EnablePtrAuthFunctionTypeDiscrimination = true )

Definition at line 2438 of file CGExprConstant.cpp.

References clang::APValue::AddrLabelDiff, clang::APValue::Array, clang::C, clang::cast(), clang::Type::castAs(), CGM, Complex, clang::APValue::ComplexFloat, clang::APValue::ComplexInt, clang::APValue::FixedPoint, clang::APValue::Float, clang::ArrayType::getElementType(), clang::VectorType::getElementType(), clang::APValue::getFloat(), clang::APValue::getInt(), clang::Value::getKind(), clang::QualType::getPointerAuth(), clang::Expr::getType(), getType(), clang::APValue::Indeterminate, clang::Init, clang::APValue::Int, clang::APValue::isFloat(), clang::Type::isIncompleteArrayType(), clang::APValue::isIndeterminate(), clang::APValue::isInt(), clang::APValue::LValue, clang::APValue::MemberPointer, clang::APValue::None, clang::APValue::Struct, tryEmitAbstractForMemory(), tryEmitPrivate(), tryEmitPrivateForMemory(), clang::APValue::Union, and clang::APValue::Vector.

tryEmitPrivate() [2/2]

llvm::Constant * ConstantEmitter::tryEmitPrivate	(	const Expr *	E,
		QualType	T )

Definition at line 2018 of file CGExprConstant.cpp.

References clang::C, CGM, clang::Expr::EvaluateAsLValue(), clang::Expr::EvaluateAsRValue(), clang::Type::isReferenceType(), clang::Type::isVoidType(), clang::Result, clang::Success, and tryEmitPrivate().

Referenced by emitAbstract(), emitAbstract(), tryEmitAbstract(), tryEmitAbstract(), tryEmitPrivate(), tryEmitPrivate(), tryEmitPrivateForMemory(), and tryEmitPrivateForMemory().

tryEmitPrivateForMemory() [1/2]

llvm::Constant * ConstantEmitter::tryEmitPrivateForMemory	(	const APValue &	value,
		QualType	T )

Definition at line 1916 of file CGExprConstant.cpp.

References clang::C, CGM, emitForMemory(), getNonMemoryType(), and tryEmitPrivate().

tryEmitPrivateForMemory() [2/2]

llvm::Constant * ConstantEmitter::tryEmitPrivateForMemory	(	const Expr *	E,
		QualType	T )

Definition at line 1909 of file CGExprConstant.cpp.

References clang::C, CGM, emitForMemory(), getNonMemoryType(), and tryEmitPrivate().

Referenced by emitForInitializer(), tryEmitForInitializer(), tryEmitPrivate(), and tryEmitPrivateForVarInit().

tryEmitPrivateForVarInit()

llvm::Constant * ConstantEmitter::tryEmitPrivateForVarInit

(

const VarDecl &

D

)

Definition at line 1857 of file CGExprConstant.cpp.

References clang::C, CGM, emitForMemory(), clang::VarDecl::evaluateValue(), clang::VarDecl::getInit(), getNonMemoryType(), clang::ValueDecl::getType(), clang::VarDecl::hasConstantInitialization(), clang::VarDecl::hasLocalStorage(), clang::CXXConstructorDecl::isDefaultConstructor(), clang::Type::isRecordType(), clang::Type::isReferenceType(), clang::FunctionDecl::isTrivial(), and tryEmitPrivateForMemory().

Referenced by tryEmitAbstractForInitializer(), and tryEmitForInitializer().

Member Data Documentation

CGF

CodeGenFunction* const clang::CodeGen::ConstantEmitter::CGF

Definition at line 26 of file ConstantEmitter.h.

Referenced by ConstantEmitter(), and ConstantEmitter().

CGM

CodeGenModule& clang::CodeGen::ConstantEmitter::CGM

Definition at line 25 of file ConstantEmitter.h.

Referenced by ConstantEmitter(), ConstantEmitter(), emitAbstract(), emitAbstract(), emitForMemory(), emitForMemory(), emitNullForMemory(), emitNullForMemory(), finalize(), getCurrentAddrPrivate(), tryEmitAbstractForMemory(), tryEmitAbstractForMemory(), tryEmitConstantExpr(), tryEmitConstantSignedPointer(), tryEmitPrivate(), tryEmitPrivate(), tryEmitPrivateForMemory(), tryEmitPrivateForMemory(), and tryEmitPrivateForVarInit().

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

• lib/CodeGen/ConstantEmitter.h
• lib/CodeGen/CGExprConstant.cpp