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conditiongotoNode Class Reference
[The AST nodes]

conditional branch of the ISA More...

#include <ast.h>

Inheritance diagram for conditiongotoNode:

gotoNode jumpNode stmtNode Node List of all members.

Garbage collection.

bool mark
static node_list nodes
static map< Node *, bool > deleted_nodes

Public Member Functions

 conditiongotoNode (labelNode *label, indexNode *left, unsigned int op_id, indexNode *right, const Coord coord=Coord::Unknown)
void left (indexNode *left)
indexNodeleft (void)
void right (indexNode *right)
indexNoderight (void)
void op (Operator *op)
Operatorop (void)
virtual void visit (Visitor *the_visitor)
 Dispatch a Visitor.
virtual void walk (Walker &the_walker)
 Dispatch a Walker.
virtual Nodechange (Changer &the_changer, bool redispatch=false)
 Dispatch a Changer.
virtual void dataflow (FlowVal *v, FlowProblem &fp)
 Run the dataflow analyzer.
virtual Nodeclone () const
 Clone the input node.
virtual void output_stmt (output_context &ct, Node *par)
 Output a statement.
virtual void output (output_context &ct, Node *par)
 Generate C code.
void output_comment (output_context &ct)
virtual typeNodetype () const
 Return the node data type.
virtual typeNodebase_type (bool TdefIndir) const
 Return the base data type of a node.
typeNodedatatype () const
 Call base_type() with the argument true.
typeNodedatatype_superior () const
 Call base_type() with the argument false.
Accessors
Methods to get and set fields in the class.

labelNodelabel () const
void label (labelNode *label)
string & name ()
void name (string name)
Accessors
Methods to get and set fields in the class.

string & comment ()
FlowValat_exit () const
void at_exit (FlowVal *ae)
Accessors
Methods to get and set fields in the class.

NodeType typ () const
 Get the node type.
Coord coord () const
 Get the source location.
void coord (const Coord coord)
 Set the source location.
bool parenthesized () const
 Get the parenthesized boolean.
void parenthesized (bool paren)
 Set the parenthesized boolean.
annote_listannotations ()
 Get the annotations list.
FlowValgen () const
 Get the "gen" flow value.
void gen (FlowVal *g)
 Set the "gen" flow value.
FlowValkill () const
 Get the "kill" flow value.
void kill (FlowVal *k)
 Set the "kill" flow value.

Static Public Member Functions

static void report ()
 Report node count statistics.

Private Attributes

indexNode_oper1
indexNode_oper2
Operator_op

Detailed Description

conditional branch of the ISA

conditiongotoNode corresponds to a conditional branch in the ISA. All control flow structures in the input AST are transformed into combinations of conditiongotoNodes, gotoNodes, and labelNodes by the dismantler. The Operator in the op field of the conditiongotoNode must be a relational operator (eg: <, <=, ==, etc.).

Definition at line 6099 of file ast.h.


Constructor & Destructor Documentation

conditiongotoNode::conditiongotoNode labelNode label,
indexNode left,
unsigned int  op_id,
indexNode right,
const Coord  coord = Coord::Unknown
 

Referenced by clone().


Member Function Documentation

annote_list& Node::annotations  )  [inline, inherited]
 

Get the annotations list.

This method returns a modifiable reference to the list of annotations on the node. Users can add new annotations, search for annotations, or remove annotations. Users are responsible for ensuring that every element of the annotation list points to a valid annotation. In particular, no element should be NULL.

See also:
Annote class

Definition at line 274 of file ast.h.

References Node::_annotations.

void stmtNode::at_exit FlowVal ae  )  [inline, inherited]
 

Reimplemented in basicblockNode.

Definition at line 4291 of file ast.h.

References stmtNode::_at_exit.

FlowVal* stmtNode::at_exit  )  const [inline, inherited]
 

Reimplemented in basicblockNode.

Definition at line 4290 of file ast.h.

References stmtNode::_at_exit.

virtual typeNode* Node::base_type bool  TdefIndir  )  const [virtual, inherited]
 

Return the base data type of a node.

This method differs from the Node::type() method in two respects. First, it follows some of the simple type inferences. For example, calling it on an idNode will return the type of its declaration. Second, the boolean argument indicates whether or not to follow typedef links.

Parameters:
TdefIndir pass true to follow typedefs to their definitions.

Reimplemented in declNode, procNode, typeNode, tdefNode, exprNode, idNode, commaNode, callNode, blockNode, and exprstmtNode.

virtual Node* conditiongotoNode::change Changer the_changer,
bool  redispatch = false
[virtual]
 

Dispatch a Changer.

This abstract method works much the walker, but allows the tree to be changed.

Parameters:
the_changer the specific Changer object to use.
redispatch pass true to revisit parts of the tree that have changed.

Reimplemented from gotoNode.

virtual Node* conditiongotoNode::clone  )  const [inline, virtual]
 

Clone the input node.

This is not a "deep" clone, so be careful. For a deep clone, use the ref_clone_changer class.

Returns:
a shallow copy of the node (no subtrees are copied).

Reimplemented from gotoNode.

Definition at line 6121 of file ast.h.

References conditiongotoNode().

string& stmtNode::comment  )  [inline, inherited]
 

Definition at line 4286 of file ast.h.

References stmtNode::_comment.

void Node::coord const Coord  coord  )  [inline, inherited]
 

Set the source location.

This location should indicate the position in the source text that this Node represents, or Coord::Unknown if it does not represent any node in the source text.

It is not common to set the source location of a node. Currently, only the compiler error messages actually make use of it.

Parameters:
coord the new location.

Definition at line 243 of file ast.h.

References Node::_coord.

Coord Node::coord  )  const [inline, inherited]
 

Get the source location.

The Coord class holds a location in the input source (file, line, position). During parsing, each AST node created records the position of the source text that it represents. However, subsequent phases may create or change nodes, so no guarantee is given about how the source location corresponds to the original source text.

Returns:
the Coord structure indicating where the node came from in the source file.

Definition at line 230 of file ast.h.

References Node::_coord.

virtual void conditiongotoNode::dataflow FlowVal v,
FlowProblem fp
[virtual]
 

Run the dataflow analyzer.

Each subclass overrides this method to define it's semantics for dataflow analysis. It alters the input flow value to reflect the effect of the node within the given flow problem, calling dataflow() on it's subtrees as necessary. See the dataflow analysis documentation for more information.

Parameters:
v the flow value to pass through the node.
fp the flow problem (specifying the transfer functions).

Reimplemented from gotoNode.

typeNode* Node::datatype  )  const [inherited]
 

Call base_type() with the argument true.

typeNode* Node::datatype_superior  )  const [inherited]
 

Call base_type() with the argument false.

void Node::gen FlowVal g  )  [inline, inherited]
 

Set the "gen" flow value.

This value is used in dataflow analyses to store information that is generated at this node. Note that each node has exactly one "gen" flow value.

In order to set the flow value to be empty, call this method with a value of NULL.

Parameters:
g the new gen flow value.

Definition at line 297 of file ast.h.

References Node::_gen.

FlowVal* Node::gen  )  const [inline, inherited]
 

Get the "gen" flow value.

This value is used in dataflow analyses to store information that is generated at this node. Note that each node has exactly one "gen" flow value.

Returns:
the "gen" flow value.

Definition at line 284 of file ast.h.

References Node::_gen.

void Node::kill FlowVal k  )  [inline, inherited]
 

Set the "kill" flow value.

This value is used in dataflow analyses to store information that is killed at this node. Note that each node has exactly one "kill" flow value.

To set the flow value to be empty, call this method with a value of NULL.

Parameters:
k the new kill flow value.

Definition at line 320 of file ast.h.

References Node::_kill.

FlowVal* Node::kill  )  const [inline, inherited]
 

Get the "kill" flow value.

This value is used in dataflow analyses to store information that is killed at this node. Note that each node has exactly one "kill" flow value.

Returns:
the "kill" flow value.

Definition at line 307 of file ast.h.

References Node::_kill.

void gotoNode::label labelNode label  )  [inherited]
 

labelNode* gotoNode::label  )  const [inline, inherited]
 

Definition at line 5653 of file ast.h.

References gotoNode::_label.

indexNode* conditiongotoNode::left void   )  [inline]
 

Definition at line 6110 of file ast.h.

References _oper1.

void conditiongotoNode::left indexNode left  )  [inline]
 

Definition at line 6109 of file ast.h.

References _oper1.

void gotoNode::name string  name  )  [inline, inherited]
 

Definition at line 5657 of file ast.h.

References gotoNode::_name.

string& gotoNode::name  )  [inline, inherited]
 

Definition at line 5656 of file ast.h.

References gotoNode::_name.

Operator* conditiongotoNode::op void   )  [inline]
 

Definition at line 6115 of file ast.h.

References _op.

void conditiongotoNode::op Operator op  ) 
 

virtual void stmtNode::output output_context ct,
Node par
[virtual, inherited]
 

Generate C code.

Each subclass overrides this method to define how to produce the output C code. To use this method, pass an output_context and a null parent.

Parameters:
ct the output context which describes the formatting.
par the parent node (or null, if at the top of a subtree).

Implements Node.

void stmtNode::output_comment output_context ct  )  [inherited]
 

virtual void conditiongotoNode::output_stmt output_context ct,
Node par
[virtual]
 

Output a statement.

Reimplemented from gotoNode.

void Node::parenthesized bool  paren  )  [inline, inherited]
 

Set the parenthesized boolean.

This boolean determines whether this expression will be parenthesized in the output. Note that that the parentheses will always be added when they are needed to disambiguate the output. This variable only controls the use of "un-necessary" parentheses.

Parameters:
paren the new value of the parenthesized boolean.

Definition at line 262 of file ast.h.

References Node::_parenthesized.

bool Node::parenthesized  )  const [inline, inherited]
 

Get the parenthesized boolean.

Returns:
true if the construct corresponding to this Node was parenthesized in the source.

Definition at line 250 of file ast.h.

References Node::_parenthesized.

static void Node::report  )  [static, inherited]
 

Report node count statistics.

The code can be configured to gather statistics about node usage according to type. This method prints the current state of that accounting information to standard out.

indexNode* conditiongotoNode::right void   )  [inline]
 

Definition at line 6112 of file ast.h.

References _oper2.

void conditiongotoNode::right indexNode right  )  [inline]
 

Definition at line 6111 of file ast.h.

References _oper2.

NodeType Node::typ  )  const [inline, inherited]
 

Get the node type.

This has nothing to do with types in the source code. It indicates what kind of AST node this is (e.g., a unary expression node or a while node).

Returns:
the node type.

Definition at line 216 of file ast.h.

References Node::_typ.

Referenced by gcWalker::delete_nodes(), and NodeInfo::nodeIndex().

virtual typeNode* Node::type  )  const [inline, virtual, inherited]
 

Return the node data type.

This method returns the C data type of a node. Several different kinds of nodes contain typeNode pointers. This method is just a unified way to access them. It does not attempt to compute the type, it just returns whatever typeNode pointer resides on the node. The subclasses that have types return them, and the others return null.

Returns:
the typeNode pointer on the node.

Reimplemented in declNode, typeNode, exprNode, and operandNode.

Definition at line 342 of file ast.h.

virtual void conditiongotoNode::visit Visitor the_visitor  )  [virtual]
 

Dispatch a Visitor.

This abstract method is the entry point for the visitor design pattern. Each node subclass defines a visit() method that calls the appropriate at_ method in the visitor. For more information see the Visitor documentation.

Parameters:
the_visitor the specific Visitor object to use.

Reimplemented from gotoNode.

virtual void conditiongotoNode::walk Walker the_walker  )  [virtual]
 

Dispatch a Walker.

This abstract method works much like the visitor, but instead walks the entire underlying subtree calling the appropriate at_ method at each node. For more information see the Walker documentation.

Parameters:
the_walker the specific Walker object to use.

Reimplemented from gotoNode.


Member Data Documentation

Operator* conditiongotoNode::_op [private]
 

Definition at line 6103 of file ast.h.

Referenced by op().

indexNode* conditiongotoNode::_oper1 [private]
 

Definition at line 6101 of file ast.h.

Referenced by left().

indexNode* conditiongotoNode::_oper2 [private]
 

Definition at line 6102 of file ast.h.

Referenced by right().

map<Node *, bool> Node::deleted_nodes [static, inherited]
 

Definition at line 165 of file ast.h.

Referenced by gcWalker::delete_nodes().

bool Node::mark [inherited]
 

Definition at line 168 of file ast.h.

Referenced by gcWalker::at_binary(), and gcWalker::delete_nodes().

node_list Node::nodes [static, inherited]
 

Definition at line 162 of file ast.h.

Referenced by gcWalker::delete_nodes(), and gcWalker::gcWalker().


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

Generated on February 1, 2006
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