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'",
519628Spowerjg@cs.wisc.edu                            cond_type)
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()
587839Snilay@cs.wisc.edu        self.symtab.pushFrame()
596657Snate@binkert.org        self.then.generate(code, return_type)
607839Snilay@cs.wisc.edu        self.symtab.popFrame()
616657Snate@binkert.org        code.dedent()
626657Snate@binkert.org        # Else part
636657Snate@binkert.org        if self.else_:
646657Snate@binkert.org            code('} else {')
656657Snate@binkert.org            code.indent()
667839Snilay@cs.wisc.edu            self.symtab.pushFrame()
676657Snate@binkert.org            self.else_.generate(code, return_type)
687839Snilay@cs.wisc.edu            self.symtab.popFrame()
696657Snate@binkert.org            code.dedent()
706657Snate@binkert.org        code('}') # End scope
716657Snate@binkert.org
726657Snate@binkert.org    def findResources(self, resources):
736657Snate@binkert.org        # Take a worse case look at both paths
746657Snate@binkert.org        self.then.findResources(resources)
756657Snate@binkert.org        if self.else_ is not None:
766657Snate@binkert.org            self.else_.findResources(resources)
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