IfStatementAST.py revision 7839
16019Shines@cs.fsu.edu# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 212509Schuan.zhu@arm.com# Copyright (c) 2009 The Hewlett-Packard Development Company 37093Sgblack@eecs.umich.edu# All rights reserved. 47093Sgblack@eecs.umich.edu# 57093Sgblack@eecs.umich.edu# Redistribution and use in source and binary forms, with or without 67093Sgblack@eecs.umich.edu# modification, are permitted provided that the following conditions are 77093Sgblack@eecs.umich.edu# met: redistributions of source code must retain the above copyright 87093Sgblack@eecs.umich.edu# notice, this list of conditions and the following disclaimer; 97093Sgblack@eecs.umich.edu# redistributions in binary form must reproduce the above copyright 107093Sgblack@eecs.umich.edu# notice, this list of conditions and the following disclaimer in the 117093Sgblack@eecs.umich.edu# documentation and/or other materials provided with the distribution; 127093Sgblack@eecs.umich.edu# neither the name of the copyright holders nor the names of its 137093Sgblack@eecs.umich.edu# contributors may be used to endorse or promote products derived from 146019Shines@cs.fsu.edu# this software without specific prior written permission. 156019Shines@cs.fsu.edu# 166019Shines@cs.fsu.edu# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 176019Shines@cs.fsu.edu# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 186019Shines@cs.fsu.edu# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 196019Shines@cs.fsu.edu# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 206019Shines@cs.fsu.edu# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 216019Shines@cs.fsu.edu# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 226019Shines@cs.fsu.edu# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236019Shines@cs.fsu.edu# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246019Shines@cs.fsu.edu# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256019Shines@cs.fsu.edu# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 266019Shines@cs.fsu.edu# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276019Shines@cs.fsu.edu 286019Shines@cs.fsu.edufrom slicc.ast.StatementAST import StatementAST 296019Shines@cs.fsu.edufrom slicc.symbols import Type 306019Shines@cs.fsu.edu 316019Shines@cs.fsu.educlass IfStatementAST(StatementAST): 326019Shines@cs.fsu.edu def __init__(self, slicc, cond, then, else_): 336019Shines@cs.fsu.edu super(IfStatementAST, self).__init__(slicc) 346019Shines@cs.fsu.edu 356019Shines@cs.fsu.edu assert cond is not None 366019Shines@cs.fsu.edu assert then is not None 376019Shines@cs.fsu.edu 386019Shines@cs.fsu.edu self.cond = cond 396019Shines@cs.fsu.edu self.then = then 406019Shines@cs.fsu.edu self.else_ = else_ 416735Sgblack@eecs.umich.edu 426735Sgblack@eecs.umich.edu def __repr__(self): 4310037SARM gem5 Developers return "[IfStatement: %r%r%r]" % (self.cond, self.then, self.else_) 4410037SARM gem5 Developers 456019Shines@cs.fsu.edu def generate(self, code, return_type): 466019Shines@cs.fsu.edu cond_code = self.slicc.codeFormatter() 476019Shines@cs.fsu.edu cond_type = self.cond.generate(cond_code) 4811793Sbrandon.potter@amd.com 4911793Sbrandon.potter@amd.com if cond_type != self.symtab.find("bool", Type): 5010037SARM gem5 Developers self.cond.error("Condition of if stmt must be bool, type was '%s'", 5110037SARM gem5 Developers ctype) 5210037SARM gem5 Developers 538229Snate@binkert.org # Conditional 548229Snate@binkert.org code.indent() 556019Shines@cs.fsu.edu code('if ($cond_code) {') 568232Snate@binkert.org # Then part 578782Sgblack@eecs.umich.edu code.indent() 586019Shines@cs.fsu.edu self.symtab.pushFrame() 596019Shines@cs.fsu.edu self.then.generate(code, return_type) 606019Shines@cs.fsu.edu self.symtab.popFrame() 616019Shines@cs.fsu.edu code.dedent() 6210037SARM gem5 Developers # Else part 6310037SARM gem5 Developers if self.else_: 6410037SARM gem5 Developers code('} else {') 6510037SARM gem5 Developers code.indent() 6610037SARM gem5 Developers self.symtab.pushFrame() 6710037SARM gem5 Developers self.else_.generate(code, return_type) 6810037SARM gem5 Developers self.symtab.popFrame() 6910037SARM gem5 Developers code.dedent() 7010037SARM gem5 Developers code('}') # End scope 7110037SARM gem5 Developers 7210037SARM gem5 Developers def findResources(self, resources): 7310037SARM gem5 Developers # Take a worse case look at both paths 7410037SARM gem5 Developers self.then.findResources(resources) 7510037SARM gem5 Developers if self.else_ is not None: 7610037SARM gem5 Developers self.else_.findResources(resources) 7710037SARM gem5 Developers