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Optimizer Class Reference

Changer that performs several optimizations. More...

#include <optimize.h>

Inheritance diagram for Optimizer:

Changer List of all members.

Public Types

enum  Order { Preorder, Postorder, Both }
enum  Depth { Subtree, NodeOnly }

Public Member Functions

 Optimizer (void)
Node * at_proc (procNode *, Order)
Node * at_unit (unitNode *, Order)
Accessors
Methods to get and set fields in the class.

Order order () const
 Return the order in which Nodes of an AST should be visited.

Depth depth () const
 Return which Nodes of an AST should be visited.

bool delete_old () const
 Return whether this Changer deletes Nodes which are removed from the AST by "at_" methods.

"at_" methods
These methods define the functions that should be performed when different classes of Nodes are encountered in the AST. The most specific "at_" method that matches a given Node's class will be called.

virtual Node * at_node (Node *the_node, Order ord)
virtual Node * at_def (defNode *the_def, Order ord)
virtual Node * at_decl (declNode *the_decl, Order ord)
virtual Node * at_subdecl (subdeclNode *the_subdecl, Order ord)
virtual Node * at_type (typeNode *the_type, Order ord)
virtual Node * at_prim (primNode *the_prim, Order ord)
virtual Node * at_tdef (tdefNode *the_tdef, Order ord)
virtual Node * at_ptr (ptrNode *the_ptr, Order ord)
virtual Node * at_array (arrayNode *the_array, Order ord)
virtual Node * at_func (funcNode *the_func, Order ord)
virtual Node * at_sue (sueNode *the_sue, Order ord)
virtual Node * at_struct (structNode *the_struct, Order ord)
virtual Node * at_union (unionNode *the_union, Order ord)
virtual Node * at_enum (enumNode *the_enum, Order ord)
virtual Node * at_suespec (suespecNode *the_suespec, Order ord)
virtual Node * at_expr (exprNode *the_expr, Order ord)
virtual Node * at_index (indexNode *the_index, Order ord)
virtual Node * at_const (constNode *the_const, Order ord)
virtual Node * at_id (idNode *the_id, Order ord)
virtual Node * at_binary (binaryNode *the_binary, Order ord)
virtual Node * at_unary (unaryNode *the_unary, Order ord)
virtual Node * at_cast (castNode *the_cast, Order ord)
virtual Node * at_comma (commaNode *the_comma, Order ord)
virtual Node * at_ternary (ternaryNode *the_ternary, Order ord)
virtual Node * at_call (callNode *the_call, Order ord)
virtual Node * at_initializer (initializerNode *the_initializer, Order ord)
virtual Node * at_stmt (stmtNode *the_stmt, Order ord)
virtual Node * at_block (blockNode *the_block, Order ord)
virtual Node * at_basicblock (basicblockNode *the_basicblock, Order ord)
virtual Node * at_exprstmt (exprstmtNode *the_exprstmt, Order ord)
virtual Node * at_target (targetNode *the_target, Order ord)
virtual Node * at_label (labelNode *the_label, Order ord)
virtual Node * at_case (caseNode *the_case, Order ord)
virtual Node * at_selection (selectionNode *the_selection, Order ord)
virtual Node * at_if (ifNode *the_if, Order ord)
virtual Node * at_switch (switchNode *the_switch, Order ord)
virtual Node * at_loop (loopNode *the_loop, Order ord)
virtual Node * at_while (whileNode *the_while, Order ord)
virtual Node * at_do (doNode *the_do, Order ord)
virtual Node * at_for (forNode *the_for, Order ord)
virtual Node * at_jump (jumpNode *the_jump, Order ord)
virtual Node * at_goto (gotoNode *the_goto, Order ord)
virtual Node * at_continue (continueNode *the_continue, Order ord)
virtual Node * at_break (breakNode *the_break, Order ord)
virtual Node * at_return (returnNode *the_return, Order ord)
virtual Node * at_attrib (attribNode *the_attrib, Order ord)
virtual Node * at_operand (operandNode *the_oper, Order ord)
virtual Node * at_conditiongoto (conditiongotoNode *the_condgoto, Order ord)
virtual Node * at_threeAddr (threeAddrNode *the_3addr, Order ord)
virtual Node * at_text (textNode *the_text, Order ord)

Detailed Description

Changer that performs several optimizations.

An optimization phase including dead code elimination, constant propagation, constant folding and control flow simplification. Soon to come: copy propagation.

Definition at line 67 of file optimize.h.

Member Enumeration Documentation

enum Changer::Depth [inherited]
 

Enumeration values:
Subtree 
NodeOnly 

Definition at line 148 of file changer.h.

enum Changer::Order [inherited]
 

Enumeration values:
Preorder 
Postorder 
Both 

Definition at line 147 of file changer.h.

Referenced by whileNode::change(), unitNode::change(), unionNode::change(), unaryNode::change(), threeAddrNode::change(), textNode::change(), ternaryNode::change(), tdefNode::change(), switchNode::change(), suespecNode::change(), subdeclNode::change(), structNode::change(), returnNode::change(), ptrNode::change(), procNode::change(), primNode::change(), operandNode::change(), metastmtNode::change(), metaexprNode::change(), labelNode::change(), initializerNode::change(), ifNode::change(), idNode::change(), gotoNode::change(), funcNode::change(), forNode::change(), exprstmtNode::change(), enumNode::change(), doNode::change(), declNode::change(), continueNode::change(), constNode::change(), conditiongotoNode::change(), commaNode::change(), castNode::change(), caseNode::change(), callNode::change(), breakNode::change(), blockNode::change(), binaryNode::change(), basicblockNode::change(), attribNode::change(), and arrayNode::change().

Constructor & Destructor Documentation

Optimizer::Optimizer (  void    )  [inline]
 

Definition at line 70 of file optimize.h.

References Changer::Preorder, and Changer::Subtree.

Member Function Documentation

virtual Node* Changer::at_array (  arrayNode *    the_array,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger.

Definition at line 253 of file changer.h.

References Changer::at_type().

Referenced by arrayNode::change().

virtual Node* Changer::at_attrib (  attribNode *    the_attrib,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 364 of file changer.h.

References Changer::at_stmt().

Referenced by attribNode::change().

virtual Node* Changer::at_basicblock (  basicblockNode *    the_basicblock,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in constantFoldingChanger.

Definition at line 313 of file changer.h.

References Changer::at_block().

Referenced by basicblockNode::change().

virtual Node* Changer::at_binary (  binaryNode *    the_binary,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in SelectionDismantle, ArrowDismantle, and ExpressionDismantle.

Definition at line 286 of file changer.h.

References Changer::at_expr().

Referenced by binaryNode::change().

virtual Node* Changer::at_block (  blockNode *    the_block,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in StaticToGlobalDismantle, and InitializerDismantle.

Definition at line 310 of file changer.h.

References Changer::at_stmt().

Referenced by Changer::at_basicblock(), and blockNode::change().

virtual Node* Changer::at_break (  breakNode *    the_break,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in BreakContinueChanger.

Definition at line 358 of file changer.h.

References Changer::at_jump().

Referenced by breakNode::change().

virtual Node* Changer::at_call (  callNode *    the_call,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in ExpressionDismantle.

Definition at line 301 of file changer.h.

References Changer::at_expr().

Referenced by callNode::change().

virtual Node* Changer::at_case (  caseNode *    the_case,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 325 of file changer.h.

References Changer::at_target().

Referenced by caseNode::change().

virtual Node* Changer::at_cast (  castNode *    the_cast,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in ExpressionDismantle, and CastRemover.

Definition at line 292 of file changer.h.

References Changer::at_expr().

Referenced by castNode::change().

virtual Node* Changer::at_comma (  commaNode *    the_comma,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in ExpressionDismantle.

Definition at line 295 of file changer.h.

References Changer::at_expr().

Referenced by commaNode::change().

virtual Node* Changer::at_conditiongoto (  conditiongotoNode *    the_condgoto,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in constantPropChanger, constantFoldingChanger, and constantsChanger.

Definition at line 370 of file changer.h.

References Changer::at_goto().

Referenced by conditiongotoNode::change().

virtual Node* Changer::at_const (  constNode *    the_const,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 280 of file changer.h.

References Changer::at_index().

Referenced by constNode::change().

virtual Node* Changer::at_continue (  continueNode *    the_continue,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in BreakContinueChanger.

Definition at line 355 of file changer.h.

References Changer::at_jump().

Referenced by continueNode::change().

virtual Node* Changer::at_decl (  declNode *    the_decl,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger, StaticToGlobalDismantle, InitializerDismantle, FlattenDismantle, ref_clone_changer, and TreeFixer.

Definition at line 232 of file changer.h.

References Changer::at_def().

Referenced by Changer::at_subdecl(), and declNode::change().

virtual Node* Changer::at_def (  defNode *    the_def,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 229 of file changer.h.

References Changer::at_node().

Referenced by Changer::at_decl(), and Changer::at_proc().

virtual Node* Changer::at_do (  doNode *    the_do,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in LoopDismantle.

Definition at line 343 of file changer.h.

References Changer::at_loop().

Referenced by doNode::change().

virtual Node* Changer::at_enum (  enumNode *    the_enum,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger.

Definition at line 268 of file changer.h.

References Changer::at_sue().

Referenced by enumNode::change().

virtual Node* Changer::at_expr (  exprNode *    the_expr,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in ipConstantsChanger.

Definition at line 274 of file changer.h.

References Changer::at_node().

Referenced by Changer::at_binary(), Changer::at_call(), Changer::at_cast(), Changer::at_comma(), Changer::at_index(), Changer::at_initializer(), Changer::at_operand(), Changer::at_ternary(), Changer::at_unary(), and metaexprNode::change().

virtual Node* Changer::at_exprstmt (  exprstmtNode *    the_exprstmt,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in SelectionDismantle, ExpressionDismantle, and FlattenDismantle.

Definition at line 316 of file changer.h.

References Changer::at_stmt().

Referenced by exprstmtNode::change().

virtual Node* Changer::at_for (  forNode *    the_for,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in LoopDismantle.

Definition at line 346 of file changer.h.

References Changer::at_loop().

Referenced by forNode::change().

virtual Node* Changer::at_func (  funcNode *    the_func,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 256 of file changer.h.

References Changer::at_type().

Referenced by funcNode::change().

virtual Node* Changer::at_goto (  gotoNode *    the_goto,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in FlattenDismantle.

Definition at line 352 of file changer.h.

References Changer::at_jump().

Referenced by Changer::at_conditiongoto(), and gotoNode::change().

virtual Node* Changer::at_id (  idNode *    the_id,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in UnusedDeclarationCleanupChanger, and constantsChanger.

Definition at line 283 of file changer.h.

References Changer::at_index().

Referenced by idNode::change().

virtual Node* Changer::at_if (  ifNode *    the_if,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in SelectionDismantle, and CFS_Changer.

Definition at line 331 of file changer.h.

References Changer::at_selection().

Referenced by ifNode::change().

virtual Node* Changer::at_index (  indexNode *    the_index,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 277 of file changer.h.

References Changer::at_expr().

Referenced by Changer::at_const(), and Changer::at_id().

virtual Node* Changer::at_initializer (  initializerNode *    the_initializer,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 304 of file changer.h.

References Changer::at_expr().

Referenced by initializerNode::change().

virtual Node* Changer::at_jump (  jumpNode *    the_jump,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 349 of file changer.h.

References Changer::at_stmt().

Referenced by Changer::at_break(), Changer::at_continue(), Changer::at_goto(), and Changer::at_return().

virtual Node* Changer::at_label (  labelNode *    the_label,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in LabelDismantle, FlattenDismantle, and ref_clone_changer.

Definition at line 322 of file changer.h.

References Changer::at_target().

Referenced by labelNode::change().

virtual Node* Changer::at_loop (  loopNode *    the_loop,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 337 of file changer.h.

References Changer::at_stmt().

Referenced by Changer::at_do(), Changer::at_for(), and Changer::at_while().

virtual Node* Changer::at_node (  Node *    the_node,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in ref_clone_changer.

Definition at line 223 of file changer.h.

Referenced by Changer::at_def(), Changer::at_expr(), Changer::at_stmt(), Changer::at_text(), Changer::at_type(), and Changer::at_unit().

virtual Node* Changer::at_operand (  operandNode *    the_oper,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 367 of file changer.h.

References Changer::at_expr().

Referenced by operandNode::change().

virtual Node* Changer::at_prim (  primNode *    the_prim,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger.

Definition at line 244 of file changer.h.

References Changer::at_type().

Referenced by primNode::change().

Node * Optimizer::at_proc (  procNode *   ,
Order   
)  [virtual]
 

Reimplemented from Changer.

Definition at line 130 of file optimize.cc.

References procNode::change(), CFS_Changer::changed, procNode::decl(), declNode::name(), and procNode::walk().

virtual Node* Changer::at_ptr (  ptrNode *    the_ptr,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger.

Definition at line 250 of file changer.h.

References Changer::at_type().

Referenced by ptrNode::change().

virtual Node* Changer::at_return (  returnNode *    the_return,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in SelectionDismantle, ReturnDismantle, FlattenDismantle, and constantPropChanger.

Definition at line 361 of file changer.h.

References Changer::at_jump().

Referenced by returnNode::change().

virtual Node* Changer::at_selection (  selectionNode *    the_selection,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 328 of file changer.h.

References Changer::at_stmt().

Referenced by Changer::at_if(), and Changer::at_switch().

virtual Node* Changer::at_stmt (  stmtNode *    the_stmt,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in TernaryDismantle, and SelectionDismantle.

Definition at line 307 of file changer.h.

References Changer::at_node().

Referenced by Changer::at_attrib(), Changer::at_block(), Changer::at_exprstmt(), Changer::at_jump(), Changer::at_loop(), Changer::at_selection(), Changer::at_target(), Changer::at_threeAddr(), and metastmtNode::change().

virtual Node* Changer::at_struct (  structNode *    the_struct,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger.

Definition at line 262 of file changer.h.

References Changer::at_sue().

Referenced by structNode::change().

virtual Node* Changer::at_subdecl (  subdeclNode *    the_subdecl,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 235 of file changer.h.

References Changer::at_decl().

Referenced by subdeclNode::change().

virtual Node* Changer::at_sue (  sueNode *    the_sue,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 259 of file changer.h.

References Changer::at_type().

Referenced by Changer::at_enum(), Changer::at_struct(), and Changer::at_union().

virtual Node* Changer::at_suespec (  suespecNode *    the_suespec,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 271 of file changer.h.

References Changer::at_type().

Referenced by suespecNode::change().

virtual Node* Changer::at_switch (  switchNode *    the_switch,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in SelectionDismantle, and ref_clone_changer.

Definition at line 334 of file changer.h.

References Changer::at_selection().

Referenced by switchNode::change().

virtual Node* Changer::at_target (  targetNode *    the_target,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 319 of file changer.h.

References Changer::at_stmt().

Referenced by Changer::at_case(), and Changer::at_label().

virtual Node* Changer::at_tdef (  tdefNode *    the_tdef,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger, and UpdateTdefChanger.

Definition at line 247 of file changer.h.

References Changer::at_type().

Referenced by tdefNode::change().

virtual Node* Changer::at_ternary (  ternaryNode *    the_ternary,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in TernaryDismantle.

Definition at line 298 of file changer.h.

References Changer::at_expr().

Referenced by ternaryNode::change().

virtual Node* Changer::at_text (  textNode *    the_text,
Order    ord
)  [inline, virtual, inherited]
 

Definition at line 376 of file changer.h.

References Changer::at_node().

Referenced by textNode::change().

virtual Node* Changer::at_threeAddr (  threeAddrNode *    the_3addr,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in SizeofChanger, FlattenDismantle, function_inline, constantPropChanger, constantFoldingChanger, deadCodeEliminationChanger, constantsChanger, and deadcodeChanger.

Definition at line 373 of file changer.h.

References Changer::at_stmt().

Referenced by threeAddrNode::change().

virtual Node* Changer::at_type (  typeNode *    the_type,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in TernaryDismantle, and ExpressionDismantle.

Definition at line 241 of file changer.h.

References Changer::at_node().

Referenced by Changer::at_array(), Changer::at_func(), Changer::at_prim(), Changer::at_ptr(), Changer::at_sue(), Changer::at_suespec(), and Changer::at_tdef().

virtual Node* Changer::at_unary (  unaryNode *    the_unary,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger, and ExpressionDismantle.

Definition at line 289 of file changer.h.

References Changer::at_expr().

Referenced by unaryNode::change().

virtual Node* Changer::at_union (  unionNode *    the_union,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in AllocSizeChanger.

Definition at line 265 of file changer.h.

References Changer::at_sue().

Referenced by unionNode::change().

Node * Optimizer::at_unit (  unitNode *   ,
Order   
)  [virtual]
 

Reimplemented from Changer.

Definition at line 225 of file optimize.cc.

References cfg_changer::generate_cfg().

virtual Node* Changer::at_while (  whileNode *    the_while,
Order    ord
)  [inline, virtual, inherited]
 

Reimplemented in LoopDismantle.

Definition at line 340 of file changer.h.

References Changer::at_loop().

Referenced by whileNode::change().

bool Changer::delete_old (    )  const [inline, inherited]
 

Return whether this Changer deletes Nodes which are removed from the AST by "at_" methods.

Definition at line 209 of file changer.h.

Referenced by subdeclNode::change(), change_list(), and Changer::Changer().

Depth Changer::depth (    )  const [inline, inherited]
 

Return which Nodes of an AST should be visited.

A value of SubTree specifies that the entire AST should be traversed. A value of NodeOnly specifies that only the root Node in the AST should be visited.

Definition at line 204 of file changer.h.

Order Changer::order (    )  const [inline, inherited]
 

Return the order in which Nodes of an AST should be visited.

Nodes can be visited before their children (Preorder), after their children (Postorder), or both (Both).

Definition at line 196 of file changer.h.

Referenced by whileNode::change(), unitNode::change(), unionNode::change(), unaryNode::change(), threeAddrNode::change(), textNode::change(), ternaryNode::change(), tdefNode::change(), switchNode::change(), suespecNode::change(), subdeclNode::change(), structNode::change(), returnNode::change(), ptrNode::change(), procNode::change(), primNode::change(), operandNode::change(), metastmtNode::change(), metaexprNode::change(), labelNode::change(), initializerNode::change(), ifNode::change(), idNode::change(), gotoNode::change(), funcNode::change(), forNode::change(), exprstmtNode::change(), enumNode::change(), doNode::change(), declNode::change(), continueNode::change(), constNode::change(), conditiongotoNode::change(), commaNode::change(), castNode::change(), caseNode::change(), callNode::change(), breakNode::change(), blockNode::change(), binaryNode::change(), basicblockNode::change(), attribNode::change(), and arrayNode::change().

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

Generated on August 27, 2003
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