ExprStatementAST.py revision 10971
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 310971Sdavid.hashe@amd.com# Copyright (c) 2013 Advanced Micro Devices, Inc. 46657Snate@binkert.org# All rights reserved. 56657Snate@binkert.org# 66657Snate@binkert.org# Redistribution and use in source and binary forms, with or without 76657Snate@binkert.org# modification, are permitted provided that the following conditions are 86657Snate@binkert.org# met: redistributions of source code must retain the above copyright 96657Snate@binkert.org# notice, this list of conditions and the following disclaimer; 106657Snate@binkert.org# redistributions in binary form must reproduce the above copyright 116657Snate@binkert.org# notice, this list of conditions and the following disclaimer in the 126657Snate@binkert.org# documentation and/or other materials provided with the distribution; 136657Snate@binkert.org# neither the name of the copyright holders nor the names of its 146657Snate@binkert.org# contributors may be used to endorse or promote products derived from 156657Snate@binkert.org# this software without specific prior written permission. 166657Snate@binkert.org# 176657Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 186657Snate@binkert.org# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 196657Snate@binkert.org# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 206657Snate@binkert.org# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 216657Snate@binkert.org# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 226657Snate@binkert.org# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 236657Snate@binkert.org# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 246657Snate@binkert.org# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 256657Snate@binkert.org# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 266657Snate@binkert.org# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 276657Snate@binkert.org# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 286657Snate@binkert.org 296657Snate@binkert.orgfrom slicc.ast.StatementAST import StatementAST 3010971Sdavid.hashe@amd.comfrom slicc.ast.LocalVariableAST import LocalVariableAST 316657Snate@binkert.orgfrom slicc.symbols import Type 326657Snate@binkert.org 336657Snate@binkert.orgclass ExprStatementAST(StatementAST): 346657Snate@binkert.org def __init__(self, slicc, expr): 356657Snate@binkert.org super(ExprStatementAST, self).__init__(slicc) 366657Snate@binkert.org self.expr = expr 376657Snate@binkert.org 386657Snate@binkert.org def __repr__(self): 396657Snate@binkert.org return "[ExprStatementAST: %s]" % (self.expr) 406657Snate@binkert.org 416657Snate@binkert.org def generate(self, code, return_type): 426657Snate@binkert.org actual_type,rcode = self.expr.inline(True) 436657Snate@binkert.org code("$rcode;") 446657Snate@binkert.org 4510971Sdavid.hashe@amd.com # The return type must be void, except for local var decls 4610971Sdavid.hashe@amd.com if (not isinstance(self.expr, LocalVariableAST) and 4710971Sdavid.hashe@amd.com actual_type != self.symtab.find("void", Type)): 4810226Snilay@cs.wisc.edu self.expr.warning("Non-void return ignored, " + \ 4910226Snilay@cs.wisc.edu "return type is '%s'", actual_type.ident) 506657Snate@binkert.org 516657Snate@binkert.org def findResources(self, resources): 526657Snate@binkert.org self.expr.findResources(resources) 536657Snate@binkert.org 54