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exprstmtnode.cc Go to the documentation of this file. // $Id: exprstmtnode.cc,v 1.3 2003/08/07 23:13:04 pnav Exp $ // ---------------------------------------------------------------------- // // C-Breeze // C Compiler Framework // // Copyright (c) 2000 University of Texas at Austin // // Samuel Z. Guyer // Daniel A. Jimenez // Calvin Lin // // Permission is hereby granted, free of charge, to any person // obtaining a copy of this software and associated documentation // files (the "Software"), to deal in the Software without // restriction, including without limitation the rights to use, copy, // modify, merge, publish, distribute, sublicense, and/or sell copies // of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT // AUSTIN BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF // OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // // We acknowledge the C-to-C Translator from MIT Laboratory for // Computer Science for inspiring parts of the C-Breeze design. // // ---------------------------------------------------------------------- #include "c_breeze.h" // -------------------------------------------------------------------- // Constructors // -------------------------------------------------------------------- exprstmtNode::exprstmtNode(exprNode * expr) : stmtNode(Expr, Coord::Unknown), _expr(expr) { if (expr) coord(expr->coord()); } // ------------------------------------------------------------ // Data type base // ------------------------------------------------------------ typeNode * exprstmtNode::base_type(bool TdefIndir) const { return expr()->base_type(TdefIndir); } // ------------------------------------------------------------ // Walker // ------------------------------------------------------------ void exprstmtNode::visit(Visitor * the_visitor) { the_visitor->at_exprstmt(this); } void exprstmtNode::walk(Walker & the_walker) { Walker::Order ord = the_walker.order(); if (ord == Walker::Preorder || ord == Walker::Both) the_walker.at_exprstmt(this, Walker::Preorder); if (the_walker.depth() == Walker::Subtree) { // -- Visit the children if (expr()) expr()->walk(the_walker); } if (ord == Walker::Postorder || ord == Walker::Both) the_walker.at_exprstmt(this, Walker::Postorder); } // ------------------------------------------------------------ // Dataflow // ------------------------------------------------------------ void exprstmtNode::dataflow(FlowVal * v, FlowProblem & fp) { if (fp.forward()) { fp.flow_exprstmt(v, this, FlowProblem::Entry); if (expr()) if (fp.basicblocks()) { fp.flow_basicblock(v, expr(), FlowProblem::Entry); fp.flow_basicblock(v, expr(), FlowProblem::Exit); } else expr()->dataflow(v, fp); fp.flow_exprstmt(v, this, FlowProblem::Exit); } else { fp.flow_exprstmt(v, this, FlowProblem::Exit); if (expr()) if (fp.basicblocks()) { fp.flow_basicblock(v, expr(), FlowProblem::Exit); fp.flow_basicblock(v, expr(), FlowProblem::Entry); } else expr()->dataflow(v, fp); fp.flow_exprstmt(v, this, FlowProblem::Entry); } } // ------------------------------------------------------------ // Output // ------------------------------------------------------------ void exprstmtNode::output_stmt(output_context & ct, Node * parent) { if (expr()) expr()->output(ct, this); ct << ';' ; } // ------------------------------------------------------------ // Changer // ------------------------------------------------------------ Node * exprstmtNode::change(Changer & the_changer, bool redispatch) { Changer::Order ord = the_changer.order(); exprstmtNode * the_exprstmt = this; if ((ord == Changer::Preorder || ord == Changer::Both) && ! redispatch) the_exprstmt = (exprstmtNode *) the_changer.at_exprstmt(the_exprstmt, Changer::Preorder); if (the_exprstmt) { if (the_exprstmt != this) return the_exprstmt->change(the_changer, true); exprNode * old_expr = the_exprstmt->expr(); if (old_expr) { exprNode * new_expr = (exprNode *) old_expr->change(the_changer); if (old_expr != new_expr) { //if (the_changer.delete_old()) //delete old_expr; the_exprstmt->expr(new_expr); } } } if ((ord == Changer::Postorder || ord == Changer::Both) && ! redispatch) the_exprstmt = (exprstmtNode *) the_changer.at_exprstmt(the_exprstmt, Changer::Postorder); return the_exprstmt; } // ------------------------------------------------------------ // Destructor // ------------------------------------------------------------ exprstmtNode::~exprstmtNode() { //delete _expr; }

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