DerefExpr Class Reference

Common base class that provides shared functionality for PtrDerefExpr and RefDerefExpr. More...

#include <expr.h>

Inheritance diagram for DerefExpr:

Collaboration diagram for DerefExpr:

Public Member Functions
	DerefExpr (Expr *e, SourcePos p, unsigned scid=DerefExprID)
llvm::Value *	GetValue (FunctionEmitContext *ctx) const
llvm::Value *	GetLValue (FunctionEmitContext *ctx) const
const Type *	GetLValueType () const
Symbol *	GetBaseSymbol () const
Expr *	Optimize ()
Public Member Functions inherited from Expr
	Expr (SourcePos p, unsigned scid)
virtual const Type *	GetType () const =0
virtual std::pair< llvm::Constant *, bool >	GetStorageConstant (const Type *type) const
virtual std::pair< llvm::Constant *, bool >	GetConstant (const Type *type) const
virtual Expr *	TypeCheck ()=0
virtual void	Print () const =0
Public Member Functions inherited from ASTNode
	ASTNode (SourcePos p, unsigned scid)
virtual	~ASTNode ()
virtual int	EstimateCost () const =0
unsigned	getValueID () const

Static Public Member Functions
static bool	classof (DerefExpr const *)
static bool	classof (ASTNode const *N)
Static Public Member Functions inherited from Expr
static bool	classof (Expr const *)
static bool	classof (ASTNode const *N)
Static Public Member Functions inherited from ASTNode
static bool	classof (ASTNode const *)

Public Attributes
Expr *	expr
Public Attributes inherited from ASTNode
SourcePos	pos

Additional Inherited Members
Public Types inherited from ASTNode
enum	ASTNodeTy {   AddressOfExprID, AssignExprID, BinaryExprID, ConstExprID,   DerefExprID, PtrDerefExprID, RefDerefExprID, ExprListID,   FunctionCallExprID, FunctionSymbolExprID, IndexExprID, StructMemberExprID,   VectorMemberExprID, NewExprID, NullPointerExprID, ReferenceExprID,   SelectExprID, SizeOfExprID, SymbolExprID, SyncExprID,   TypeCastExprID, UnaryExprID, MaxExprID, AssertStmtID,   BreakStmtID, CaseStmtID, ContinueStmtID, DeclStmtID,   DefaultStmtID, DeleteStmtID, DoStmtID, ExprStmtID,   ForeachActiveStmtID, ForeachStmtID, ForeachUniqueStmtID, ForStmtID,   GotoStmtID, IfStmtID, LabeledStmtID, PrintStmtID,   ReturnStmtID, StmtListID, SwitchStmtID, UnmaskedStmtID }

Detailed Description

Common base class that provides shared functionality for PtrDerefExpr and RefDerefExpr.

Definition at line 536 of file expr.h.

Constructor & Destructor Documentation

DerefExpr()

DerefExpr::DerefExpr	(	Expr *	e,
		SourcePos	p,
		unsigned	scid = DerefExprID
	)

Definition at line 7222 of file expr.cpp.

References expr.

Member Function Documentation

classof() [1/2]

static bool DerefExpr::classof ( DerefExpr const *  )

inlinestatic

Definition at line 540 of file expr.h.

classof() [2/2]

static bool DerefExpr::classof ( ASTNode const *  N )

inlinestatic

Definition at line 541 of file expr.h.

References ASTNode::DerefExprID, Expr::GetBaseSymbol(), Expr::GetLValue(), Expr::GetLValueType(), Expr::GetValue(), ASTNode::getValueID(), Expr::Optimize(), ASTNode::PtrDerefExprID, and ASTNode::RefDerefExprID.

GetBaseSymbol()

Symbol * DerefExpr::GetBaseSymbol ( ) const

virtual

For expressions that have values based on a symbol (e.g. regular symbol references, array indexing, etc.), this returns a pointer to that symbol.

Reimplemented from Expr.

Definition at line 7259 of file expr.cpp.

References expr, and Expr::GetBaseSymbol().

GetLValue()

llvm::Value * DerefExpr::GetLValue ( FunctionEmitContext *  ctx ) const

virtual

For expressions that can provide an lvalue (e.g. array indexing), this function should emit IR that computes the expression's lvalue and returns the corresponding llvm::Value. Expressions that can't provide an lvalue should leave this unimplemented; the default implementation returns NULL.

Reimplemented from Expr.

Definition at line 7247 of file expr.cpp.

References expr, and Expr::GetValue().

GetLValueType()

const Type * DerefExpr::GetLValueType ( ) const

virtual

Returns the type of the value returned by GetLValueType(); this should be a pointer type of some sort (uniform or varying).

Reimplemented from Expr.

Definition at line 7253 of file expr.cpp.

References expr, and Expr::GetType().

GetValue()

llvm::Value * DerefExpr::GetValue ( FunctionEmitContext *  ctx ) const

virtual

This is the main method for Expr implementations to implement. It should call methods in the FunctionEmitContext to emit LLVM IR instructions to the current basic block in order to generate an llvm::Value that represents the expression's value.

Implements Expr.

Definition at line 7224 of file expr.cpp.

References expr, Expr::GetBaseSymbol(), FunctionEmitContext::GetFullMask(), Expr::GetType(), Expr::GetValue(), lAddVaryingOffsetsIfNeeded(), lMaskForSymbol(), FunctionEmitContext::LoadInst(), lVaryingStructHasUniformMember(), and FunctionEmitContext::SetDebugPos().

Referenced by lEmitPrePostIncDec().

Optimize()

Expr * DerefExpr::Optimize ( )

virtual

This method should perform early optimizations of the expression (constant folding, etc.) and return a pointer to the resulting expression. If an error is encountered during optimization, NULL should be returned.

Implements Expr.

Definition at line 7261 of file expr.cpp.

References expr.

Member Data Documentation

expr

Expr* DerefExpr::expr

Definition at line 552 of file expr.h.

Referenced by DerefExpr(), PtrDerefExpr::EstimateCost(), RefDerefExpr::EstimateCost(), GetBaseSymbol(), GetLValue(), GetLValueType(), PtrDerefExpr::GetType(), RefDerefExpr::GetType(), GetValue(), Optimize(), PtrDerefExpr::Print(), RefDerefExpr::Print(), PtrDerefExpr::TypeCheck(), RefDerefExpr::TypeCheck(), and WalkAST().

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

• expr.h
• expr.cpp