IfStatementAST.py revision 6999
16657Snate@binkert.org# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 26657Snate@binkert.org# Copyright (c) 2009 The Hewlett-Packard Development Company 36657Snate@binkert.org# All rights reserved. 46657Snate@binkert.org# 56657Snate@binkert.org# Redistribution and use in source and binary forms, with or without 66657Snate@binkert.org# modification, are permitted provided that the following conditions are 76657Snate@binkert.org# met: redistributions of source code must retain the above copyright 86657Snate@binkert.org# notice, this list of conditions and the following disclaimer; 96657Snate@binkert.org# redistributions in binary form must reproduce the above copyright 106657Snate@binkert.org# notice, this list of conditions and the following disclaimer in the 116657Snate@binkert.org# documentation and/or other materials provided with the distribution; 126657Snate@binkert.org# neither the name of the copyright holders nor the names of its 136657Snate@binkert.org# contributors may be used to endorse or promote products derived from 146657Snate@binkert.org# this software without specific prior written permission. 156657Snate@binkert.org# 166657Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 176657Snate@binkert.org# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 186657Snate@binkert.org# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 196657Snate@binkert.org# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 206657Snate@binkert.org# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 216657Snate@binkert.org# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 226657Snate@binkert.org# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236657Snate@binkert.org# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246657Snate@binkert.org# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256657Snate@binkert.org# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 266657Snate@binkert.org# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276657Snate@binkert.org 286657Snate@binkert.orgfrom slicc.ast.StatementAST import StatementAST 296657Snate@binkert.orgfrom slicc.symbols import Type 306657Snate@binkert.org 316657Snate@binkert.orgclass IfStatementAST(StatementAST): 326657Snate@binkert.org def __init__(self, slicc, cond, then, else_): 336657Snate@binkert.org super(IfStatementAST, self).__init__(slicc) 346657Snate@binkert.org 356657Snate@binkert.org assert cond is not None 366657Snate@binkert.org assert then is not None 376657Snate@binkert.org 386657Snate@binkert.org self.cond = cond 396657Snate@binkert.org self.then = then 406657Snate@binkert.org self.else_ = else_ 416657Snate@binkert.org 426657Snate@binkert.org def __repr__(self): 436657Snate@binkert.org return "[IfStatement: %r%r%r]" % (self.cond, self.then, self.else_) 446657Snate@binkert.org 456657Snate@binkert.org def generate(self, code, return_type): 466999Snate@binkert.org cond_code = self.slicc.codeFormatter() 476657Snate@binkert.org cond_type = self.cond.generate(cond_code) 486657Snate@binkert.org 496657Snate@binkert.org if cond_type != self.symtab.find("bool", Type): 506657Snate@binkert.org self.cond.error("Condition of if stmt must be bool, type was '%s'", 516657Snate@binkert.org ctype) 526657Snate@binkert.org 536657Snate@binkert.org # Conditional 546657Snate@binkert.org code.indent() 556657Snate@binkert.org code('if ($cond_code) {') 566657Snate@binkert.org # Then part 576657Snate@binkert.org code.indent() 586657Snate@binkert.org self.then.generate(code, return_type) 596657Snate@binkert.org code.dedent() 606657Snate@binkert.org # Else part 616657Snate@binkert.org if self.else_: 626657Snate@binkert.org code('} else {') 636657Snate@binkert.org code.indent() 646657Snate@binkert.org self.else_.generate(code, return_type) 656657Snate@binkert.org code.dedent() 666657Snate@binkert.org code('}') # End scope 676657Snate@binkert.org 686657Snate@binkert.org def findResources(self, resources): 696657Snate@binkert.org # Take a worse case look at both paths 706657Snate@binkert.org self.then.findResources(resources) 716657Snate@binkert.org if self.else_ is not None: 726657Snate@binkert.org self.else_.findResources(resources) 73