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switchNode Class ReferenceSwitch statement.
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Garbage collection. | |
bool | mark |
node_list | nodes |
map< Node *, bool > | deleted_nodes |
Public Member Functions | |
switchNode (exprNode *expr, stmtNode *stmt, const Coord coord=Coord::Unknown) | |
Create a new switch statement. | |
virtual | ~switchNode () |
Destroy a switchNode. | |
virtual void | dataflow (FlowVal *v, FlowProblem &fp) |
Run the dataflow analyzer. | |
virtual Node * | clone () 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 typeNode * | type () const |
Return the node data type. | |
virtual typeNode * | base_type (bool TdefIndir) const |
Return the base data type of a node. | |
typeNode * | datatype () const |
Call base_type() with the argument true. | |
typeNode * | datatype_superior () const |
Call base_type() with the argument false. | |
Accessors | |
Methods to get and set fields in the class. | |
target_list & | cases () |
const target_list & | cases () const |
bool | has_default () const |
void | has_default (bool has_default) |
FlowVal * | at_top () const |
void | at_top (FlowVal *at) |
AST Traversal | |
virtual void | visit (Visitor *the_visitor) |
Dispatch a Visitor. | |
virtual void | walk (Walker &the_walker) |
Dispatch a Walker. | |
virtual Node * | change (Changer &the_changer, bool redispatch=false) |
Dispatch a Changer. | |
Accessors | |
Methods to get and set fields in the class. | |
exprNode * | expr () const |
void | expr (exprNode *expr) |
exprNode * | get_expr () |
blockNode * | stmt () const |
void | stmt (blockNode *stmt) |
blockNode * | get_stmt () |
Accessors | |
Methods to get and set fields in the class. | |
string & | comment () |
FlowVal * | at_exit () const |
void | at_exit (FlowVal *ae) |
text_list & | pragmas () |
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_list & | annotations () |
Get the annotations list. | |
FlowVal * | gen () const |
Get the "gen" flow value. | |
void | gen (FlowVal *g) |
Set the "gen" flow value. | |
FlowVal * | kill () const |
Get the "kill" flow value. | |
void | kill (FlowVal *k) |
Set the "kill" flow value. | |
Static Public Member Functions | |
void | report () |
Report node count statistics. | |
Private Attributes | |
REF target_list | _cases |
the list of cases | |
bool | _has_default |
a flag that is true if the switch has a default case | |
FlowVal * | _at_top |
dataflow analysis entry value |
This class represents the switch statement. The child statement is typically a compound statement containing the cases. All cases should be contained somewhere in that subtree, although there is currently no check for this. It contains a list of the cases (including the default) that are within its scope. This list is initially empty, but is computed after parsing by the set_container_walker.
The NodeType is Switch.
Definition at line 5235 of file ast.h.
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Create a new switch statement. The new switch statement has the given selection expression and the child statement that should contain the cases.
Definition at line 44 of file switchnode.cc. References Switch. Referenced by clone(). |
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Destroy a switchNode.
Definition at line 225 of file switchnode.cc. |
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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.
Definition at line 276 of file ast.h. References annote_list. |
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Reimplemented in basicblockNode. |
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Reimplemented in basicblockNode. Definition at line 4372 of file ast.h. Referenced by init_flowproblem_walker::at_stmt(), whileNode::dataflow(), dataflow(), returnNode::dataflow(), forNode::dataflow(), doNode::dataflow(), and breakNode::dataflow(). |
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Definition at line 5290 of file ast.h. Referenced by init_flowproblem_walker::at_switch(), and dataflow(). |
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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.
Reimplemented in declNode, procNode, typeNode, tdefNode, exprNode, idNode, commaNode, callNode, blockNode, and exprstmtNode. Definition at line 152 of file node.cc. Referenced by Node::datatype(), and Node::datatype_superior(). |
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Definition at line 5285 of file ast.h. References target_list. |
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Definition at line 5284 of file ast.h. References target_list. Referenced by TreeChecker::at_switch(), set_container_walker::at_switch(), ref_clone_changer::at_switch(), print_walker::at_switch(), print_tree_visitor::at_switch(), and caseNode::container(). |
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Dispatch a Changer. This abstract method works much the walker, but allows the tree to be changed.
Implements Node. Definition at line 179 of file switchnode.cc. References Changer::at_switch(), Changer::Both, blockNode::change(), Node::change(), selectionNode::expr(), Changer::order(), Changer::Order, Changer::Postorder, Changer::Preorder, and selectionNode::stmt(). |
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Clone the input node. This is not a "deep" clone, so be careful. For a deep clone, use the ref_clone_changer class.
Implements Node. Definition at line 5312 of file ast.h. References switchNode(). |
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Definition at line 4368 of file ast.h. Referenced by DefUseWalker::at_basicblock(), reachingGenKillWalker::at_proc(), copyPropChanger::at_proc(), deadcodeChanger::at_threeAddr(), LivenessComments::comment_stmt(), loopTree::depthFirstSearch(), loopTree::findBody(), stmtNode::output_comment(), and Dominators::print(). |
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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.
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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.
Implements Node. Definition at line 84 of file switchnode.cc. References stmtNode::at_exit(), at_top(), FlowProblem::basicblocks(), blockNode::dataflow(), Node::dataflow(), selectionNode::expr(), FlowProblem::flow_basicblock(), FlowProblem::flow_switch(), FlowProblem::forward(), has_default(), FlowVal::meet(), FlowVal::meet_and_diff(), selectionNode::stmt(), and FlowVal::to_top(). |
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Call base_type() with the argument true.
Definition at line 157 of file node.cc. References Node::base_type(). Referenced by funcNode::is_void_args(). |
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Call base_type() with the argument false.
Definition at line 162 of file node.cc. References Node::base_type(). |
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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.
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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.
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Definition at line 5126 of file ast.h. Referenced by ifNode::get_true_br(). |
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Definition at line 5287 of file ast.h. Referenced by set_container_walker::at_case(), and dataflow(). |
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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.
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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.
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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.
Implements Node. Definition at line 55 of file stmtnode.cc. References Block, output_context::new_line(), stmtNode::output_comment(), stmtNode::output_stmt(), and Node::typ(). Referenced by Pointers::analyze_procedure(), deadcodeChanger::at_threeAddr(), procedureInfo::block_position(), procNode::output(), whileNode::output_stmt(), output_stmt(), loopTreeNode::output_stmt(), labelNode::output_stmt(), ifNode::output_stmt(), forNode::output_stmt(), doNode::output_stmt(), caseNode::output_stmt(), precisionAnalyzer::record(), and precisionAnalyzer::report(). |
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Definition at line 65 of file stmtnode.cc. References stmtNode::comment(), output_context::indent_in(), output_context::indent_out(), and output_context::new_line(). Referenced by stmtNode::output(), and blockNode::output_stmt(). |
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Output a statement.
Implements stmtNode. Definition at line 159 of file switchnode.cc. References selectionNode::expr(), stmtNode::output(), exprNode::output(), output_context::space(), and selectionNode::stmt(). |
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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.
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Get the parenthesized boolean.
Definition at line 252 of file ast.h. Referenced by exprNode::parens(), and CBZ::WarnAboutPrecedence(). |
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Definition at line 4377 of file ast.h. References text_list. |
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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. Definition at line 184 of file node.cc. References Node::_count, Node::_t_count, Array, Attrib, Binary, Block, Break, Call, Case, Cast, Comma, Const, Continue, Decl, Do, Enum, Expr, For, Func, Goto, Id, If, Initializer, Label, Prim, Proc, Ptr, Return, Struct, sueSpec, Switch, Tdef, Ternary, Text, Unary, Undeclared, Union, and While. |
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Definition at line 5125 of file ast.h. Referenced by CFS_Changer::at_if(), cfg_changer::at_proc(), vcgASTWalker::at_switch(), tree_visitor::at_switch(), TreeChecker::at_switch(), print_walker::at_switch(), print_tree_visitor::at_switch(), change(), dataflow(), output_stmt(), ifNode::true_br(), and walk(). |
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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.
Reimplemented in declNode, typeNode, exprNode, and operandNode. Definition at line 344 of file ast.h. Referenced by tree_visitor::at_block(), ReturnDismantle::at_return(), asm_gen_walker::doCallerSave(), and briggs_reg_alloc::interfere(). |
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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.
Implements Node. Definition at line 54 of file switchnode.cc. References Visitor::at_switch(). |
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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.
Implements Node. Definition at line 59 of file switchnode.cc. References Walker::at_switch(), Walker::Both, Walker::depth(), selectionNode::expr(), Walker::order(), Walker::Order, Walker::Postorder, Walker::Preorder, selectionNode::stmt(), Walker::Subtree, blockNode::walk(), and Node::walk(). |
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dataflow analysis entry value This field is used by the dataflow analysis framework to hold the incoming flow value needed by each case statement. |
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the list of cases This list includes the default case. It is initially empty, but is computer after parsing by the set_container_walker. |
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a flag that is true if the switch has a default case
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Definition at line 116 of file node.cc. Referenced by gcWalker::delete_nodes(), and Node::~Node(). |
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Definition at line 170 of file ast.h. Referenced by gcWalker::at_binary(), gcWalker::at_node(), gcWalker::delete_nodes(), and SymbolTable< T >::mark_nodes(). |
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Definition at line 115 of file node.cc. Referenced by gcWalker::delete_nodes(), gcWalker::gcWalker(), and Node::Node(). |
Generated on August 27, 2003
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