copyPropChanger Class ReferencePerforms global (intraprocedural) copy propagation.
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#include <copyprop.h>
Inheritance diagram for copyPropChanger:
List of all members.
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Public Types |
typedef set< threeAddrNode * > | threeAddr_set |
typedef threeAddr_set::iterator | threeAddr_set_p |
typedef set< declNode * > | decl_set |
typedef decl_set::iterator | decl_set_p |
enum | Order { Preorder,
Postorder,
Both
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enum | Depth { Subtree,
NodeOnly
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Public Member Functions |
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Methods to get and set fields in the class.
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Order | order () const |
| Return the order in which Nodes of an AST should be visited.
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Depth | depth () const |
| Return which Nodes of an AST should be visited.
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bool | delete_old () const |
| Return whether this Changer deletes Nodes which are removed from the AST by "at_" methods.
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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.
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virtual Node * | at_node (Node *the_node, Order ord) |
virtual Node * | at_unit (unitNode *the_unit, 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) |
Static Public Member Functions |
static void | change () |
| Copy propagation on entire program.
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static void | change (unitNode *) |
| Copy propagation on one unit.
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static void | change (procNode *) |
| Copy propagation on one procedure.
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Private Types |
typedef pair< declNode *,
declNode * > | Var_pair |
typedef set< Var_pair > | ACP |
Private Member Functions |
| copyPropChanger () |
| Constructor.
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Node * | at_proc (procNode *, Order ord) |
copyFlowVal * | create_copy_set (basicblockNode *) |
copyFlowVal * | create_kill_set (basicblockNode *, stmt_list) |
void | solve_global_dataflow (stmt_list) |
void | local_copy_prop (basicblockNode *) |
void | copy_value (operandNode *opnd, const ACP &acp) |
idNode * | copy_value (idNode *opnd, const ACP &acp) |
Static Private Member Functions |
static void | remove_ACP (ACP &acp, declNode *v) |
Private Attributes |
threeAddr_set | copies |
threeAddr_set | ambiguous |
map< threeAddrNode *, declNode * > | defines |
copyFlowVal * | _top |
copyFlowVal * | _bottom |
map< basicblockNode *, copyFlowVal * > | Gen |
map< basicblockNode *, copyFlowVal * > | Kill |
map< basicblockNode *, copyFlowVal * > | In |
map< basicblockNode *, copyFlowVal * > | Out |
Detailed Description
Performs global (intraprocedural) copy propagation.
This class performs the constant propagation. The program must already be cfg'd. The three public static change() functions allow the optimization to be performed on the entire program, on one unit, or on a single procedure. The algorithm used is adopted from Muchnick chapter 12.5. Note that copy statements with casts are ignored. Also, the algorithm itself has limitation. For example. if(..)
x = y;
else
x = y;
z = x;
To handle this case is left as future work.
Definition at line 64 of file copyprop.h.
Member Typedef Documentation
Member Enumeration Documentation
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- Enumeration values:
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Definition at line 148 of file changer.h. |
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- Enumeration values:
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Definition at line 147 of file changer.h. |
Constructor & Destructor Documentation
copyPropChanger::copyPropChanger |
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[inline, private] |
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Member Function Documentation
virtual Node* Changer::at_array |
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arrayNode * |
the_array, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_attrib |
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attribNode * |
the_attrib, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_binary |
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binaryNode * |
the_binary, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_block |
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blockNode * |
the_block, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_break |
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breakNode * |
the_break, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_call |
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callNode * |
the_call, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_case |
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caseNode * |
the_case, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_cast |
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castNode * |
the_cast, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_comma |
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commaNode * |
the_comma, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_const |
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constNode * |
the_const, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_continue |
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continueNode * |
the_continue, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_decl |
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declNode * |
the_decl, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_def |
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defNode * |
the_def, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_do |
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doNode * |
the_do, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_enum |
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enumNode * |
the_enum, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_expr |
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exprNode * |
the_expr, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_exprstmt |
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exprstmtNode * |
the_exprstmt, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_for |
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forNode * |
the_for, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_func |
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funcNode * |
the_func, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_goto |
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gotoNode * |
the_goto, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_id |
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idNode * |
the_id, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_if |
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ifNode * |
the_if, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_index |
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indexNode * |
the_index, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_jump |
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jumpNode * |
the_jump, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_label |
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labelNode * |
the_label, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_loop |
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loopNode * |
the_loop, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_node |
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Node * |
the_node, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_operand |
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operandNode * |
the_oper, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_prim |
( |
primNode * |
the_prim, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_ptr |
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ptrNode * |
the_ptr, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_return |
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returnNode * |
the_return, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_stmt |
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stmtNode * |
the_stmt, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_struct |
( |
structNode * |
the_struct, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_subdecl |
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subdeclNode * |
the_subdecl, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_sue |
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sueNode * |
the_sue, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_suespec |
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suespecNode * |
the_suespec, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_switch |
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switchNode * |
the_switch, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_target |
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targetNode * |
the_target, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_tdef |
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tdefNode * |
the_tdef, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_ternary |
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ternaryNode * |
the_ternary, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_text |
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textNode * |
the_text, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_type |
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typeNode * |
the_type, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_unary |
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unaryNode * |
the_unary, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_union |
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unionNode * |
the_union, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_unit |
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unitNode * |
the_unit, |
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Order |
ord |
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[inline, virtual, inherited] |
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virtual Node* Changer::at_while |
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whileNode * |
the_while, |
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Order |
ord |
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[inline, virtual, inherited] |
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static void copyPropChanger::change |
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procNode * |
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[static] |
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Copy propagation on one procedure.
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static void copyPropChanger::change |
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unitNode * |
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[static] |
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Copy propagation on one unit.
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static void copyPropChanger::change |
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[static] |
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Copy propagation on entire program.
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idNode* copyPropChanger::copy_value |
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idNode * |
opnd, |
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const ACP & |
acp |
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[private] |
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void copyPropChanger::copy_value |
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operandNode * |
opnd, |
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const ACP & |
acp |
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[private] |
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copyFlowVal* copyPropChanger::create_copy_set |
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basicblockNode * |
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[private] |
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bool Changer::delete_old |
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const [inline, inherited] |
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Depth Changer::depth |
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const [inline, inherited] |
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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.
References Changer::_depth. |
Order Changer::order |
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const [inline, inherited] |
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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.
References Changer::_order. |
static void copyPropChanger::remove_ACP |
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ACP & |
acp, |
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declNode * |
v |
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[static, private] |
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void copyPropChanger::solve_global_dataflow |
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stmt_list |
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[private] |
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Member Data Documentation
The documentation for this class was generated from the following file:
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