FuncDeclAST.py revision 6714:028047200ff7
1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 2# Copyright (c) 2009 The Hewlett-Packard Development Company 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions are 7# met: redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer; 9# redistributions in binary form must reproduce the above copyright 10# notice, this list of conditions and the following disclaimer in the 11# documentation and/or other materials provided with the distribution; 12# neither the name of the copyright holders nor the names of its 13# contributors may be used to endorse or promote products derived from 14# this software without specific prior written permission. 15# 16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28from m5.util.code_formatter import code_formatter 29 30from slicc.ast.DeclAST import DeclAST 31from slicc.symbols import Func, Type 32 33class FuncDeclAST(DeclAST): 34 def __init__(self, slicc, return_type, ident, formals, pairs, statements): 35 super(FuncDeclAST, self).__init__(slicc, pairs) 36 37 self.return_type = return_type 38 self.ident = ident 39 self.formals = formals 40 self.statements = statements 41 42 def __repr__(self): 43 return "[FuncDecl: %s]" % self.ident 44 45 def files(self, parent=None): 46 if "external" in self or self.statements is None: 47 return set() 48 49 if parent: 50 ident = "%s_%s" % (parent, self.ident) 51 else: 52 ident = self.ident 53 return set(("%s.cc" % ident,)) 54 55 def generate(self): 56 types = [] 57 params = [] 58 void_type = self.symtab.find("void", Type) 59 60 # Generate definition code 61 self.symtab.pushFrame() 62 63 # Lookup return type 64 return_type = self.return_type.type 65 66 # Generate function header 67 for formal in self.formals: 68 # Lookup parameter types 69 type, ident = formal.generate() 70 types.append(type) 71 params.append(ident) 72 73 body = code_formatter() 74 if self.statements is None: 75 self["external"] = "yes" 76 else: 77 rtype = self.statements.generate(body, return_type) 78 79 self.symtab.popFrame() 80 81 machine = self.state_machine 82 func = Func(self.symtab, self.ident, self.location, return_type, 83 types, params, str(body), self.pairs, machine) 84 85 if machine is not None: 86 machine.addFunc(func) 87 else: 88 self.symtab.newSymbol(func) 89