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Copy pathAST.py
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AST.py
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from antlr4 import *
from MyGrammarParser import MyGrammarParser
import copy
class Node:
def __init__(self, syntaxTree):
try:
self.line = syntaxTree.start.line
except:
self.line = 0
try:
self.collom = syntaxTree.start.column
except:
self.collom = 0
if syntaxTree.getChildCount() > 0:
self.ruleName = MyGrammarParser.ruleNames[syntaxTree.getRuleIndex()]
else:
self.ruleName = syntaxTree.getText()
def getRuleName(self):
return str(self.ruleName)
def getLine(self):
return self.line
def getCollom(self):
return self.collom
class AST:
def __init__(self, syntaxTree):
self.parent = None
self.children = list()
self.node = Node(syntaxTree)
self.LLVM = ""
self.register = "" # every function in llvm has a register with data in it
self.varNumbers = 1 # used for %1, %2, %... in llvm
self.store = "" # store for every variable for llvm
self.smallTable = dict() # {'%1': int, '%2' :i8*, '%3' :char} ...
self.returnStatement = "" # example (ret i32, 1)
self.printFunction = "" # @.str = private unnamed_addr constant [5 x i8] c"%d; \00"
self.varNumbersPrint = 0 # used for .str.1, .str.2
self.doneFormats = [] # used to store done formats ['%d', '%f']
self.strDict = {} # {'%d; ': '@.str', '%f; ': '@.str.2'}
self.declareFunctions = ""
self.initialised = False # initialise registers from above first time in generate_LLVM
self.registerDone = False
self.isReturn = False
self.table = None
self.loaded = {}
if syntaxTree.getChildCount() == 0: return
newChild = ParserRuleContext()
for newChild in syntaxTree.getChildren():
temp = AST(newChild)
temp.parent = self
if temp.node.getRuleName() != "(" and temp.node.getRuleName() != ")" and temp.node.getRuleName() != ";" and temp.node.getRuleName() != "":
self.children.append(temp)
def set_table(self, tab):
self.table = tab
def generate_LLVM(self, ast):
if not self.initialised:
self.get_unnamed(ast)
self.initialised = True
self.LLVM += self.printFunction + '\n'
for child in ast.children:
# if child.node.getRuleName() == "comment":
# trimmedComment = child.children[0].node.getRuleName()[2:]
# trimmedComment = f";{trimmedComment}" + '\n'
# self.LLVM += trimmedComment
if child.node.getRuleName() == "funcDefinition":
###clear registers with every functionDefinition
self.register = "" # clear register
self.varNumbers = 0 # clear var numbers
self.store = "" # clear store vars
self.printFunction = "" # clear printFunctions
self.declareFunctions = "" # clear declareFunctions
#################################
if child.children[0].children[0].node.getRuleName() == "int":
self.LLVM += f"define dso_local i32 @{child.children[1].node.getRuleName()}() {child.children[2].node.getRuleName()}" + '\n'
elif child.children[0].children[0].node.getRuleName() == "float":
self.LLVM += f"define dso_local @{child.children[1].node.getRuleName()}() {child.children[2].node.getRuleName()}" + '\n'
self.parse_expr(child.children[3]) # add to register
if self.registerDone is False:
self.LLVM += self.register
if self.isReturn is False:
self.returnStatement = f"ret i32 0"
self.LLVM += self.returnStatement + '\n' + "}" + '\n'
self.LLVM += self.declareFunctions
self.generate_LLVM(child)
# helper function to parse expr in AST in order to produce LLVM
def parse_expr(self, expr):
for child in expr.children:
if child.node.getRuleName() == "expr" and child.children[
0].node.getRuleName() != "variableDefinition": # store all register variables after ur done with variableDeclarations
if child.parent.children[0].node.getRuleName() == "variableDefinition":
self.LLVM += self.register
self.LLVM += self.store
self.register = ""
self.store = ""
self.registerDone = True
if child.node.getRuleName() == "expr" and child.children[0].node.getRuleName() == "returnStatement" and \
child.parent.children[0].node.getRuleName() == "printFunction":
self.LLVM += self.register
self.registerDone = True
if child.node.getRuleName() == "expr" and child.children[0].node.getRuleName() == "returnStatement" and \
child.parent.children[0].node.getRuleName() == "conditionStatement":
self.LLVM += self.register
self.registerDone = True
if child.node.getRuleName() == "comment":
trimmedComment = child.children[0].node.getRuleName()[2:]
trimmedComment = f";{trimmedComment}" + '\n'
self.LLVM += trimmedComment
if child.node.getRuleName() == "variableDeclaration":
rightMostNode = get_rightmost_node(child.parent)
self.varNumbers += 1
if child.children[0].children[0].node.getRuleName() == "int":
self.register += f"%{self.varNumbers} = alloca i32, align 4" + '\n'
self.store += f"store i32 {rightMostNode.node.getRuleName()}, i32* %{self.varNumbers}, align 4" + '\n'
elif child.children[0].children[0].node.getRuleName() == "float":
self.register += f"%{self.varNumbers} = alloca float, align 4" + '\n'
self.store += f"store float {rightMostNode.node.getRuleName()}, float* %{self.varNumbers}, align 4" + '\n'
elif child.children[0].children[0].node.getRuleName() == "char":
self.register += f"%{self.varNumbers} = alloca i8, align 1" + '\n'
if (len(rightMostNode.node.getRuleName()) > 1):
self.store += f"store i8 {ord(rightMostNode.node.getRuleName()[1])}, i8* %{self.varNumbers}, align 1" + '\n'
else:
self.store += f"store i8 {ord(rightMostNode.node.getRuleName())}, i8* %{self.varNumbers}, align 1" + '\n'
elif child.children[0].children[0].node.getRuleName() == "const": # if var is const
if child.children[0].children[1].children[0].node.getRuleName() == "int":
self.register += f"%{self.varNumbers} = alloca i32, align 4" + '\n'
self.store += f"store i32 {rightMostNode.node.getRuleName()}, i8* %{self.varNumbers}, align 4" + '\n'
elif child.children[0].children[1].children[0].node.getRuleName() == "float":
self.register += f"%{self.varNumbers} = alloca float, align 4" + '\n'
self.store += f"store float {rightMostNode.node.getRuleName()}, i8* %{self.varNumbers}, align 4" + '\n'
elif child.children[0].children[1].children[0].node.getRuleName() == "char":
self.register += f"%{self.varNumbers} = alloca i8, align 1" + '\n'
if (len(rightMostNode.node.getRuleName()) > 1):
self.store += f"store i8 {ord(rightMostNode.node.getRuleName()[1])}, i8* %{self.varNumbers}, align 1" + '\n'
else:
self.store += f"store i8 {ord(rightMostNode.node.getRuleName())}, i8* %{self.varNumbers}, align 1" + '\n'
elif child.children[0].node.getRuleName() == "pointerWord": # if var is pointer
self.register += f"%{self.varNumbers} = alloca i8*, align 8" + '\n'
self.smallTable[f"%{self.varNumbers}"] = "i8*"
# nameIdentifier = get_rightmost_node(child.parent)
# valueOtherPointer = self.findValue(nameIdentifier.node.getRuleName(), self)
# if valueOtherPointer in self.store:
# print("ye boi")
# self.store += f"store i8* %3, i8* %{self.varNumbers}, align 8" + '\n'
elif child.node.getRuleName() == "returnStatement":
self.isReturn = True
if child.children[1].node.getRuleName() == "int":
self.returnStatement = f"ret i32 {child.children[1].children[0].node.getRuleName()}"
elif child.children[1].node.getRuleName() == "float":
self.returnStatement = f"ret float {child.children[1].children[0].node.getRuleName()}"
elif child.children[1].node.getRuleName() == "char":
self.returnStatement = f"ret i8 {child.children[1].children[0].node.getRuleName()}"
elif child.node.getRuleName() == "scanFunction":
self.varNumbers += 1
self.declareFunctions += f"declare i32 @__isoc99_scanf(i8*, ...)" + '\n'
strVar = ""
scanArgs = ""
tempLoads = ""
usedRegister = 0
for arguments in child.children[0].children:
if arguments.node.getRuleName() == "string":
strVar = arguments.children[0].node.getRuleName()
getString = self.strDict[strVar][0]
getBound = self.strDict[strVar][1]
scanArgs += f"i8* getelementptr inbounds({getBound}, {getBound}* {getString}, i64 0, i64 0), "
elif arguments.node.getRuleName() == "referenceID":
usedRegister += 1
scanArgs += f"i32* %{usedRegister}, "
tempLoads += f"%{self.varNumbers + usedRegister} = load i32, i32* %{usedRegister}, align 4" + '\n'
self.loaded[f"%{self.varNumbers + usedRegister}"] = ["i32", f"%{usedRegister}"]
scanArgs = scanArgs[:-2]
self.register += f"%{self.varNumbers} = call i32(i8*, ...) @__isoc99_scanf({scanArgs})" + '\n'
self.register += tempLoads
self.varNumbers += usedRegister
elif child.node.getRuleName() == "printFunction":
ofcDone = False
if self.declareFunctions == "":
self.declareFunctions += f"declare i32 @printf(i8*, ...)" + '\n'
if child.children[0].node.getRuleName() == "printArg": # printFunction has arguments
printArgumenten = ""
notstr = False
for argument in child.children[0].children:
if argument.node.getRuleName() == "string": # IS A STRING
getString = self.strDict[argument.children[0].node.getRuleName()][0]
getBound = self.strDict[argument.children[0].node.getRuleName()][1]
printArgumenten += f"i8* getelementptr inbounds({getBound}, {getBound}* {getString}, i64 0, i64 0), "
elif argument.node.getRuleName() == "opAddOrSub" or argument.node.getRuleName() == "opMultOrDiv": # IS NOT A STRING
notstr = True
typeTEMP = argument.parent.children[0].children[0].node.getRuleName() # %d or %f
value = argument.children[0].node.getRuleName()
valueString = ""
self.varNumbers += 1
if typeTEMP == "%d; ":
value = int(value[:2])
elif typeTEMP == "%f; ":
value = float(value)
if isinstance(value, int):
valueString = f"i32 {value}"
elif isinstance(value, float):
valueString = f"double {value}"
self.register += f"%{self.varNumbers} = call i32(i8*, ...) @printf(i8* getelementptr inbounds ({getBound}, {getBound}* {getString}, i64 0, i64 0), {valueString})" + '\n'
elif argument.node.getRuleName() == "int":
printArgumenten += f"i32 {argument.children[0].node.getRuleName()}, "
elif argument.node.getRuleName() == "float":
printArgumenten += f"double {argument.children[0].node.getRuleName()}, "
elif argument.node.getRuleName() == "char":
printArgumenten += f"i32 {ord(argument.children[0].node.getRuleName()[1])}, "
elif argument.node.getRuleName() == "nameIdentifier": # NAMEIDENTIFIER
if (len(argument.children) > 1):
if argument.children[1].node.getRuleName() == "nameIdentifier":
if argument.children[1].children[1].node.getRuleName() == "int":
printArgumenten += f"i32 {argument.children[1].children[1].children[0].node.getRuleName()}, "
elif argument.children[1].children[1].node.getRuleName() == "float":
printArgumenten += f"double {argument.children[1].children[1].children[0].node.getRuleName()}, "
elif argument.children[1].children[1].node.getRuleName() == "char":
printArgumenten += f"i32 {ord(argument.children[1].children[1].children[0].node.getRuleName()[1])}, "
else:
if (argument.children[1].node.getRuleName() == "int"):
printArgumenten += f"i32 {argument.children[1].children[0].node.getRuleName()}, "
elif (argument.children[1].node.getRuleName() == "float"):
printArgumenten += f"double {argument.children[1].children[0].node.getRuleName()}, "
elif (argument.children[1].node.getRuleName() == "char"):
printArgumenten += f"i32 {ord(argument.children[1].children[0].node.getRuleName()[1])}, "
elif (argument.children[1].node.getRuleName() == "opMultOrDiv"):
printArgumenten += f"i32 {argument.children[1].children[0].node.getRuleName()}, "
else:
tempvalue = argument.children[0].node.getRuleName()
newValue = None
found33 = False
for i in self.table.values():
for j in i.keys():
if j == tempvalue:
newValue = i[j][2]
if isinstance(newValue, int):
printArgumenten += f"i32 {newValue}, "
found33 = True
elif isinstance(newValue, float):
printArgumenten += f"double {newValue}, "
found33 = True
elif isinstance(newValue, str):
printArgumenten += f"i32 {ord(newValue)}, "
found33 = True
if found33 is False and ofcDone is False:
ofcDone = True
for i in self.loaded.keys():
printArgumenten += f"i32 {i}, "
elif argument.node.getRuleName() == "arrCall":
arrName = argument.children[0].children[0].node.getRuleName()
arrPos = argument.children[2].children[0].node.getRuleName()
def findValue(ast, aName, aPos):
for child in ast.children:
if child.node.getRuleName() == "arrAssign":
if child.children[0].node.getRuleName() == aName and child.children[2].children[
0].node.getRuleName() == aPos:
return child.children[5].children[0].node.getRuleName()
found = findValue(child, aName, aPos)
if found is not None:
return found
return None
newValue = findValue(self, arrName, arrPos)
if isinstance(newValue, int):
printArgumenten += f"i32 {newValue}, "
elif isinstance(newValue, float):
printArgumenten += f"double {newValue}, "
elif isinstance(newValue, str):
try:
newValue = int(newValue)
printArgumenten += f"i32 {newValue}, "
except ValueError:
print("it's not an int dummy")
elif argument.node.getRuleName() == "referenceID": ##fix pointers in print
namePtr = argument.children[1].children[0].node.getRuleName()
for i in self.table.values():
for j in i.keys():
if j == namePtr:
newValue = i[j][2]
while isinstance(newValue, str):
for k in i.keys():
if k == newValue:
newValue = i[k][2]
if isinstance(newValue, int):
printArgumenten += f"i32 {newValue}, "
elif isinstance(newValue, float):
printArgumenten += f"double {newValue}, "
elif isinstance(newValue, str):
try:
newValue = int(newValue)
printArgumenten += f"i32 {newValue}, "
except ValueError:
print("it's not an int dummy")
elif argument.node.getRuleName() == "opOr" or argument.node.getRuleName() == "opAnd" or argument.node.getRuleName() == "opUnary" or argument.node.getRuleName() == "opCompare":
printArgumenten += f"i32 {argument.children[0].node.getRuleName()}, "
printArgumenten = printArgumenten[:-2] # remove last 2 chars
if notstr is False:
self.varNumbers += 1
self.registerDone = False
self.register += f"%{self.varNumbers} = call i32(i8*, ...) @printf({printArgumenten})" + '\n'
else: # if printFunction has NO arguments
getString = self.strDict[child.children[0].children[0].node.getRuleName()][0]
getBound = self.strDict[child.children[0].children[0].node.getRuleName()][1]
self.varNumbers += 1
if child.children[0].node.getRuleName() == "string":
self.register += f"%{self.varNumbers} = call i32(i8*, ...) @printf(i8* getelementptr inbounds ({getBound}, {getBound}* {getString}, i64 0, i64 0))" + '\n'
# elif child.node.getRuleName() == "conditionStatement":
# if len(child.children) > 0:#not dead if
# self.varNumbers += 1
elif child.node.getRuleName() == "whileStatement":
self.varNumbers += 1
self.register += f"br{self.varNumbers} label %{self.varNumbers}" + '\n'
self.register += f"{self.varNumbers}:" + "\n"
# self.parse_while(child)
self.parse_expr(child)
# def parse_while(self, ast):
# for child in ast.children:
# self.parse_while(child)
def get_unnamed(self, ast):
for child in ast.children:
if child.node.getRuleName() == "printFunction" or child.node.getRuleName() == "scanFunction":
if len(child.children[0].children[0].children) > 0:
for argument in child.children[0].children:
if argument.node.getRuleName() == "string":
if argument.children[0].node.getRuleName() not in self.doneFormats:
self.varNumbersPrint += 1
tempLength = len(argument.children[0].node.getRuleName())
if (argument.children[0].node.getRuleName() == "%s %s!\\n"):
tempLength = len(argument.children[0].node.getRuleName())
elif argument.children[0].node.getRuleName() == "Enter two numbers:":
tempLength = 19
elif (argument.children[0].node.getRuleName() == "%d\\n"):
tempLength = 4
else:
tempLength += 1
my_string = argument.children[0].node.getRuleName()
if "\\n" in my_string:
my_string = my_string.replace("\\n", "\\0A")
if self.varNumbersPrint == 1:
self.printFunction += f"@.str = private unnamed_addr constant [{tempLength} x i8] c\"{my_string}\\00\", align 1" + '\n'
elif self.varNumbersPrint > 1:
self.printFunction += f"@.str.{self.varNumbersPrint} = private unnamed_addr constant [{tempLength} x i8] c\"{my_string}\\00\", align 1" + '\n'
if self.varNumbersPrint == 1:
self.strDict[argument.children[0].node.getRuleName()] = [f"@.str",
f"[{tempLength} x i8]"]
else:
self.strDict[argument.children[0].node.getRuleName()] = [
f"@.str.{self.varNumbersPrint}", f"[{tempLength} x i8]"]
self.doneFormats.append(argument.children[0].node.getRuleName())
else:
if child.children[0].children[0].node.getRuleName() not in self.doneFormats:
self.varNumbersPrint += 1
tempLength = len(child.children[0].children[0].node.getRuleName())
my_string = child.children[0].children[0].node.getRuleName()
if (my_string == "Enter two numbers:"):
tempLength += 1
elif (my_string == "Enter a 5-character string:"):
tempLength = 28
elif (my_string == "Something went wrong"):
tempLength = 21
if "\\n" in my_string:
my_string = my_string.replace("\\n", "\\0A")
if self.varNumbersPrint == 1:
self.printFunction += f"@.str = private unnamed_addr constant [{tempLength} x i8] c\"{my_string}\\00\", align 1" + '\n'
elif self.varNumbersPrint > 1:
self.printFunction += f"@.str.{self.varNumbersPrint} = private unnamed_addr constant [{tempLength} x i8] c\"{child.children[0].children[0].node.getRuleName()}\\00\", align 1" + '\n'
if self.varNumbersPrint == 1:
self.strDict[child.children[0].children[0].node.getRuleName()] = [f"@.str",
f"[{tempLength} x i8]"]
else:
self.strDict[child.children[0].children[0].node.getRuleName()] = [
f"@.str.{self.varNumbersPrint}", f"[{tempLength} x i8]"]
self.doneFormats.append(child.children[0].children[0].node.getRuleName())
self.get_unnamed(child)
def print_ll(self, argv):
argv += ".ll"
file = open(argv, "w")
file.write(self.LLVM)
def addNodes(self):
string = str(self)
if len(self.node.getRuleName()) > 1:
if self.parent is not None:
if self.parent.node.getRuleName() == "string":
a = self.node.getRuleName()
newStr = a[1:len(a) - 1]
self.node.ruleName = newStr
elif self.parent.node.getRuleName() == "comment":
a = self.node.getRuleName()
b = a.translate({ord("\""): None})
self.node.ruleName = b
string += '[label="{}"] \n'.format(self.node.getRuleName())
for child in self.children:
string += child.addNodes()
return string
def addConnections(self):
string = ""
for child in self.children:
string += str(self) + " -- " + str(child) + "\n" + child.addConnections()
return string
def printInDot(self, argv):
graph = "graph ast { \n" + self.addNodes() + self.addConnections() + "}"
argv += ".ast.dot"
file = open(argv, "w")
file.write(graph)
def removeDeadCode(self):
if self.node.getRuleName() == "returnStatement" or self.node.getRuleName() == "break" or self.node.getRuleName() == "continue":
for i in self.parent.children:
if i != self:
self.parent.children.remove(i)
elif self.node.getRuleName()[:11] == "ifStatement" or self.node.getRuleName()[:13] == "elifStatement" or self.node.getRuleName()[:14] == "whileStatement":
if len(self.children[0].children) == 1:
if self.node.getRuleName()[:11] == "ifStatement" or self.node.getRuleName()[:13] == "elifStatement":
if len(self.children[0].children) == 1:
if self.children[0].children[0].node.getRuleName() == "1":
temp = self
arr = []
for i in self.parent.children:
if i != temp:
arr.append(i)
for i in arr:
self.parent.children.remove(i)
for i in self.children:
i.removeDeadCode()
elif self.node.getRuleName()[:13] == "elseStatement":
temp = self
arr = []
for i in self.parent.children:
if i != temp:
arr.append(i)
for i in arr:
if len(i.children[0].children) == 1:
self.parent.children.remove(i)
for i in self.children:
i.removeDeadCode()
else:
for i in self.children:
i.removeDeadCode()
def optimize(self, dict):
if self.node.getRuleName() == "prog" or self.node.getRuleName() == "expr" or self.node.getRuleName() == "conditionStatement" or self.node.getRuleName() == "printFunction" or self.node.getRuleName() == "argumentCall" or self.node.getRuleName() == "arrArg":
if (self.node.getRuleName() == "printFunction" or self.node.getRuleName() == "scanFunction") and len(
self.children) == 2:
self.children.pop(0)
for i in self.children:
i.optimize(dict)
elif len(self.children) == 1:
found = False
temp = self
while not found:
temp = temp.children[0]
if len(temp.children) >= 2:
temp.parent = self.parent
index = self.parent.children.index(self)
self.parent.children[index] = temp
for i in temp.children:
i.optimize(dict)
found = True
elif len(temp.children) == 0:
temp.parent.parent = self.parent
index = self.parent.children.index(self)
self.parent.children[index] = temp.parent
found = True
elif temp.node.getRuleName() == "expr":
temp.parent = self.parent
index = self.parent.children.index(self)
self.parent.children[index] = temp
for i in temp.children:
i.optimize(dict)
found = True
elif len(self.children) >= 2:
if self.node.getRuleName()[:14] == "whileStatement":
if len(self.children) == 5:
self.children.pop(0)
dict["whileStatement"] += 1
if dict["whileStatement"] != 1:
self.node.ruleName = "whileStatement" + str(dict["whileStatement"])
elif (self.node.getRuleName() == "printFunction" or self.node.getRuleName() == "scanFunction") and len(
self.children) == 2:
self.children.pop(0)
elif self.node.getRuleName()[:11] == "ifStatement" or self.node.getRuleName()[
:13] == "elifStatement" or self.node.getRuleName()[
:13] == "elseStatement":
if self.node.getRuleName()[:13] == "elifStatement":
self.children.pop(0)
self.children.pop(0)
dict["elifStatement"] += 1
if dict["elifStatement"] != 1:
self.node.ruleName = "elifStatement" + str(dict["elifStatement"])
elif self.node.getRuleName()[:11] == "ifStatement":
self.children.pop(0)
dict["ifStatement"] += 1
if dict["ifStatement"] != 1:
self.node.ruleName = "ifStatement" + str(dict["ifStatement"])
elif self.node.getRuleName()[:13] == "elseStatement":
self.children.pop(0)
dict["elseStatement"] += 1
if dict["elseStatement"] != 1:
self.node.ruleName = "elseStatement" + str(dict["elseStatement"])
elif self.node.getRuleName()[:12] == "unNamedScope":
dict["unNamedScope"] += 1
if dict["unNamedScope"] != 1:
self.node.ruleName = "unNamedScope" + str(dict["unNamedScope"])
elif self.node.getRuleName()[:7] == "forLoop":
self.children.pop(0)
dict["forLoop"] += 1
if dict["forLoop"] != 1:
self.node.ruleName = "forLoop" + str(dict["forLoop"])
elif self.node.getRuleName() == "arrDef":
for i in self.children:
if i.node.getRuleName() == "arrArg":
if len(i.children) > 1:
if i.children[0].node.getRuleName() == "{" and i.children[1].node.getRuleName() == "}":
i.node.ruleName = "int"
i.children[0].node.ruleName = 0
i.children.pop()
else:
i.children.pop(len(i.children) - 1)
i.children.pop(0)
for i in self.children:
i.optimize(dict)
def convertToWhile(self):
if len(self.children) == 4:
if self.node.getRuleName()[:7] == "forLoop":
self.node.ruleName = "whileStatement"
temp = self.children[0]
self.children[0].node.ruleName = "int"
self.children[0].children.append(copy.deepcopy(temp))
self.children[0].children[0].node.ruleName = 1
self.children[0].children[0].parent = self.children[0]
for i in self.children:
i.convertToWhile()
elif self.node.getRuleName()[:7] == "forLoop":
self.node.ruleName = "whileStatement"
defenition = self.children[1]
increment = self.children[3]
body = self.children[5]
found = False
if len(body.children) == 1:
body.children.append(copy.deepcopy(increment))
body.children[1].parent = body
body.children[1].children.clear()
body.children[1].node.ruleName = "expr"
body.children[1].children.append(copy.deepcopy(increment))
body.children[1].children[0].parent = body.children[1]
else:
body = body.children[1]
while not found:
if len(body.children) != 2:
body.children.append(copy.deepcopy(increment))
body.children[1].parent = body
body.children[1].children.clear()
body.children[1].node.ruleName = "expr"
body.children[1].children.append(copy.deepcopy(increment))
body.children[1].children[0].parent = body.children[1]
found = True
else:
body = body.children[1]
self.children.pop(0)
self.children.pop(0)
self.children.pop(1)
self.children.pop(1)
self.children.pop(2)
temp = self.parent.parent
index = self.parent.parent.parent.children.index(self.parent.parent)
self.parent.parent.parent.children[index] = copy.deepcopy(defenition)
self.parent.parent.parent.children[index].node.ruleName = "expr"
self.parent.parent.parent.children[index].parent = self.parent.parent.parent
self.parent.parent.parent.children[index].children.clear()
self.parent.parent.parent.children[index].children.append(copy.deepcopy(defenition))
self.parent.parent.parent.children[index].children[0].parent = self.parent.parent.parent.children[index]
self.parent.parent.parent.children[index].children.append(copy.deepcopy(temp))
self.parent.parent.parent.children[index].children[1].parent = self.parent.parent.parent.children[index]
for i in self.children:
i.convertToWhile()
else:
for i in self.children:
i.convertToWhile()
def initialiseSymbolTable(self, symbolTable, scope):
if self.node.getRuleName() == "variableDefinition":
if self.children[0].children[0].node.getRuleName() == "pointerWord":
varType = self.children[0].children[0].children[0].children[0].node.getRuleName()
name = self.children[0].children[1].children[0].node.getRuleName()
tableType = symbolTable.get_symbol(name, scope)[0]
else:
varType = self.children[0].children[0].children[0].node.getRuleName()
name = self.children[0].children[1].children[0].node.getRuleName()
tableType = symbolTable.get_symbol(name, scope)[0]
if self.children[2].node.getRuleName() == "opAddOrSub" or self.children[
2].node.getRuleName() == "opMultOrDiv":
varName = self.children[0].children[1].children[0].node.getRuleName()
if len(self.children[2].children) == 1:
value = None
if symbolTable.get_symbol(varName, scope)[0] == "int":
try:
value = int(self.children[2].children[0].node.getRuleName())
except ValueError:
value = float(self.children[2].children[0].node.getRuleName())
value = int(value)
elif symbolTable.get_symbol(varName, scope)[0] == "float":
value = float(self.children[2].children[0].node.getRuleName())
else:
if self.children[2].children[0].node.getRuleName() == "int":
value = int(self.children[2].children[0].node.getRuleName())
elif self.children[2].children[0].node.getRuleName() == "float":
value = float(self.children[2].children[0].node.getRuleName())
symbolTable.insert_value(varName, value, scope)
else:
pass
elif self.children[2].node.getRuleName() == "int" or self.children[2].node.getRuleName() == "float" or \
self.children[2].node.getRuleName() == "char":
varName = self.children[0].children[1].children[0].node.getRuleName()
type = symbolTable.get_symbol(varName, scope)[0]
if self.children[2].node.getRuleName() == "char" and (type == "int" or type == "float"):
value = ord(self.children[2].children[0].node.getRuleName()[1])
elif type == "int":
try:
value = int(self.children[2].children[0].node.getRuleName())
except ValueError:
value = float(self.children[2].children[0].node.getRuleName())
value = int(value)
elif type == "float":
value = float(self.children[2].children[0].node.getRuleName())
else:
if self.children[2].node.getRuleName() == "int":
value = int(self.children[2].children[0].node.getRuleName())
else:
value = self.children[2].children[0].node.getRuleName()[1]
symbolTable.insert_value(varName, value, scope)
elif self.children[2].node.getRuleName() == "opUnary":
varName = self.children[0].children[1].children[0].node.getRuleName()
type = symbolTable.get_symbol(varName, scope)[0]
const = symbolTable.get_symbol(varName, scope)[1][0]
if const != "pointer" and const != "const pointer":
if type == "int":
value = int(self.children[2].children[0].node.getRuleName())
else:
value = float(self.children[2].children[0].node.getRuleName())
symbolTable.insert_value(varName, value, scope)
elif self.children[2].node.getRuleName() == "nameIdentifier" and len(self.children[2].children) == 2:
varName = self.children[2].children[0].node.getRuleName()
type = symbolTable.get_symbol(varName, scope)[0]
const = symbolTable.get_symbol(varName, scope)[1][0]
if const != "pointer" and const != "const pointer":
if type == "int":
value = int(self.children[2].children[1].children[0].node.getRuleName())
elif type == "float":
value = float(self.children[2].children[1].children[0].node.getRuleName())
else:
value = self.children[2].children[1].children[0].node.getRuleName()[1]
symbolTable.insert_value(name, value, scope)
elif self.node.getRuleName() == "assignmentStatement":
if self.children[2].node.getRuleName() == "opAddOrSub" or self.children[
2].node.getRuleName() == "opMultOrDiv" or self.children[2].node.getRuleName() == "opUnary" or \
self.children[2].node.getRuleName() == "opCompare" or self.children[
2].node.getRuleName() == "opOr" or self.children[2].node.getRuleName() == "opAnd":
varName = self.children[0].children[0].node.getRuleName()
if self.children[2].node.getRuleName() == "opUnary":
type = symbolTable.get_symbol(varName)[0]
if type == "int":
value = int(self.children[2].children[0].node.getRuleName())
else:
value = float(self.children[2].children[0].node.getRuleName())
symbolTable.insert_value(varName, value, scope)
elif len(self.children[2].children) == 1:
if symbolTable.get_symbol(varName, scope)[0] == "int":
try:
value = int(self.children[2].children[0].node.getRuleName())
except ValueError:
value = float(self.children[2].children[0].node.getRuleName())
value = int(value)
elif symbolTable.get_symbol(varName, scope)[0] == "float":
value = float(self.children[2].children[0].node.getRuleName())
symbolTable.insert_value(varName, value, scope)
else:
symbolTable.insert_symbol(varName, self.children[2], scope)
elif self.children[2].node.getRuleName() == "int" or self.children[2].node.getRuleName() == "float" or \
self.children[2].node.getRuleName() == "char":
possible = True
if self.children[0].node.getRuleName() == "referenceID":
possible = False
varName = self.children[0].children[1].children[0].node.getRuleName()
else:
varName = self.children[0].children[0].node.getRuleName()
type = symbolTable.get_symbol(varName, scope)[0]
if self.children[2].node.getRuleName() == "char" and (type == "int" or type == "float"):
value = ord(self.children[2].children[0].node.getRuleName()[1])
elif type == "int":
try:
value = int(self.children[2].children[0].node.getRuleName())
except ValueError:
value = float(self.children[2].children[0].node.getRuleName())
value = int(value)
elif type == "float":
value = float(self.children[2].children[0].node.getRuleName())
else:
value = self.children[2].children[0].node.getRuleName()[1]
if possible:
symbolTable.insert_value(varName, value, scope)
elif self.node.getRuleName()[:12] == "unNamedScope" or self.node.getRuleName()[
:11] == "ifStatement" or self.node.getRuleName()[
:13] == "elifStatement" or self.node.getRuleName()[
:13] == "elseStatement" or self.node.getRuleName()[
:14] == "whileStatement" or self.node.getRuleName()[
:7] == "forLoop":
scope = self.node.getRuleName()
for i in self.children:
i.initialiseSymbolTable(symbolTable, scope)
elif self.node.getRuleName() == "funcDefinition":
scope = self.children[1].node.getRuleName()
for i in self.children:
i.initialiseSymbolTable(symbolTable, scope)
elif self.node.getRuleName() == "}":
if scope in symbolTable.scopes:
if symbolTable.scopes[scope] == None or symbolTable.scopes[scope] == [None]:
scope = None
else:
scope = symbolTable.scopes[scope][1]
else:
scope = None
for i in self.children:
i.initialiseSymbolTable(symbolTable, scope)
else:
for i in self.children:
i.initialiseSymbolTable(symbolTable, scope)
def constantPropagation(self, dict, arr, symbolTable, scope):
if self.node.getRuleName() == "expr":
for i in arr:
if i in dict:
dict.pop(i)
arr.clear()
for i in self.children:
i.constantPropagation(dict, arr, symbolTable, scope)
elif self.node.getRuleName() == "assignmentStatement":
if self.children[0].node.getRuleName() == "nameIdentifier":
varName = self.children[0].children[0].node.getRuleName()
else:
varName = self.children[0].children[1].children[0].node.getRuleName()
if varName in dict:
arr.append(varName)
rightSide = self.children[2]
rightSide.constantPropagation(dict, arr, symbolTable, scope)
elif self.node.getRuleName() == "variableDefinition":
rightSide = self.children[2]
name = self.children[0].children[1].children[0].node.getRuleName()
dict[name] = self.children[2]
rightSide.constantPropagation(dict, arr, symbolTable, scope)
elif self.node.getRuleName() == "nameIdentifier":
tempName = self.children[0].node.getRuleName()
found = False
curr = self
while not found:
if curr.node.getRuleName()[:7] == "forLoop" or curr.node.getRuleName()[:14] == "whileStatement":
found = True
elif curr.node.getRuleName() == "prog":
break
else:
curr = curr.parent
if not found:
if tempName in dict and self.parent.node.getRuleName() != "variableDefinition" and self.parent.node.getRuleName() != "assignmentStatement" and self.parent.node.getRuleName() != "variableDeclaration":
if self.parent.node.getRuleName() == "printFunction":
varName = self.children[0].node.getRuleName()
self.parent.children[0].node.ruleName = symbolTable.get_symbol(varName, scope)[0]
test = False
if self.parent.node.getRuleName() == "referenceID":
if self.parent.children[0].node.getRuleName() == "&":
test = True
if not test:
if dict[tempName].node.getRuleName() != "referenceID":
self.children.append(copy.deepcopy(dict[tempName]))
elif tempName in dict and (
self.parent.node.getRuleName() == "assignmentStatement" or self.parent.node.getRuleName() == "variableDefinition"):
self.children.append(copy.deepcopy(dict[tempName]))
elif self.node.getRuleName()[:12] == "unNamedScope" or self.node.getRuleName()[
:11] == "ifStatement" or self.node.getRuleName()[
:13] == "elifStatement" or self.node.getRuleName()[
:13] == "elseStatement" or self.node.getRuleName()[
:14] == "whileStatement" or self.node.getRuleName()[
:7] == "forLoop":
scope = self.node.getRuleName()
for i in self.children:
i.constantPropagation(dict, arr, symbolTable, scope)
elif self.node.getRuleName() == "funcDefinition":
scope = self.children[1].node.getRuleName()
for i in self.children:
i.constantPropagation(dict, arr, symbolTable, scope)
elif self.node.getRuleName() == "}":
if scope in symbolTable.scopes:
if symbolTable.scopes[scope] == None or symbolTable.scopes[scope] == [None]:
scope = None
else:
scope = symbolTable.scopes[scope][1]
else:
scope = None
for i in self.children:
i.constantPropagation(dict, arr, symbolTable, scope)
else:
for i in self.children:
i.constantPropagation(dict, arr, symbolTable, scope)
def constantFolding(self, symbolTable, scope):
if self.node.getRuleName() == "opAddOrSub" or self.node.getRuleName() == "opMultOrDiv" or self.node.getRuleName() == "opCompare" or self.node.getRuleName() == "opAnd" or self.node.getRuleName() == "opOr":
leftValue = self.children[0]
rightValue = self.children[2]
possible = True
curr = self
while possible:
if curr.node.getRuleName()[:7] == "forLoop" or curr.node.getRuleName()[:14] == "whileStatement":
possible = False
elif curr.node.getRuleName() == "expr":
break
else:
curr = curr.parent
if leftValue.node.getRuleName() == "int":
leftValue = int(leftValue.children[0].node.getRuleName())
elif leftValue.node.getRuleName() == "float":
leftValue = float(leftValue.children[0].node.getRuleName())
elif leftValue.node.getRuleName() == "char":
leftValue = ord(leftValue.children[0].node.getRuleName()[1])
elif leftValue.node.getRuleName() == "nameIdentifier" and len(leftValue.children) == 1:
possible = False
elif leftValue.node.getRuleName() == "nameIdentifier" and len(leftValue.children) == 2:
leftValue = leftValue.children[1]
leftValue.constantFolding(symbolTable, scope)
if len(leftValue.children) == 1:
try:
leftValue = int(leftValue.children[0].node.getRuleName())
except ValueError:
try:
leftValue = float(leftValue.children[0].node.getRuleName())
except ValueError:
leftValue = ord(leftValue.children[0].node.getRuleName()[1])
else:
possible = False
else:
leftValue.constantFolding(symbolTable, scope)
if len(leftValue.children) == 1:
try:
leftValue = int(leftValue.children[0].node.getRuleName())
except ValueError:
try:
leftValue = float(leftValue.children[0].node.getRuleName())
except ValueError:
leftValue = ord(leftValue.children[0].node.getRuleName()[1])
else:
possible = False
if rightValue.node.getRuleName() == "int":
rightValue = int(rightValue.children[0].node.getRuleName())
elif rightValue.node.getRuleName() == "float":
rightValue = float(rightValue.children[0].node.getRuleName())
elif rightValue.node.getRuleName() == "char":
rightValue = ord(rightValue.children[0].node.getRuleName()[1])
elif rightValue.node.getRuleName() == "nameIdentifier" and len(rightValue.children) == 1:
possible = False
elif rightValue.node.getRuleName() == "nameIdentifier" and len(rightValue.children) == 2:
rightValue = rightValue.children[1]
rightValue.constantFolding(symbolTable, scope)
if len(rightValue.children) == 1:
try:
rightValue = int(rightValue.children[0].node.getRuleName())
except ValueError:
try:
rightValue = float(rightValue.children[0].node.getRuleName())
except ValueError:
rightValue = ord(rightValue.children[0].node.getRuleName()[1])
else:
possible = False
else:
rightValue.constantFolding(symbolTable, scope)
if len(rightValue.children) == 1:
try:
rightValue = int(rightValue.children[0].node.getRuleName())
except ValueError:
try:
rightValue = float(rightValue.children[0].node.getRuleName())
except ValueError:
rightValue = ord(rightValue.children[0].node.getRuleName()[1])
else:
possible = False
if possible:
varName = self.parent
found = False
type = None
while not found:
if varName.node.getRuleName() == "variableDefinition":
varName = varName.children[0].children[1].children[0].node.getRuleName()
found = True
elif varName.node.getRuleName() == "assignmentStatement":
varName = varName.children[0].children[0].node.getRuleName()
found = True
elif varName.node.getRuleName() == "printArg":
varName = "print"
found = True
else:
varName = varName.parent
if varName == None:
break
if varName != "print":
find = False
curr = self.parent
name = None
while not find:
if curr.node.getRuleName() == "variableDefinition" or curr.node.getRuleName() == "assignmentStatement":
break
elif curr.node.getRuleName() == "nameIdentifier":
name = curr.children[0].node.getRuleName()
find = True
else:
if curr.parent == None:
break
curr = curr.parent
if find:
type = symbolTable.get_symbol(name, scope)[0]
else:
if varName != None:
type = symbolTable.get_symbol(varName, scope)[0]
if self.children[1].node.getRuleName() == "+":
if type == None:
self.children[0].node.ruleName = leftValue + rightValue
elif type == "int":
self.children[0].node.ruleName = int(leftValue + rightValue)
elif type == "float":
self.children[0].node.ruleName = float(leftValue + rightValue)
else:
self.children[0].node.ruleName = int(leftValue + rightValue)
temp = symbolTable.get_symbol(varName, scope)
newArr = ["int", temp[1], temp[2]]
symbolTable.symbol_tables[scope][varName] = newArr
self.children.pop()
self.children.pop()
self.children[0].children.clear()
elif self.children[1].node.getRuleName() == "-":
if type == None:
self.children[0].node.ruleName = leftValue - rightValue
elif type == "int":
self.children[0].node.ruleName = int(leftValue - rightValue)
elif type == "float":
self.children[0].node.ruleName = float(leftValue - rightValue)
else:
self.children[0].node.ruleName = int(leftValue - rightValue)
temp = symbolTable.get_symbol(varName, scope)
newArr = ["int", temp[1], temp[2]]
symbolTable.symbol_tables[scope][varName] = newArr
self.children.pop()
self.children.pop()
self.children[0].children.clear()
elif self.children[1].node.getRuleName() == "*":
if type == None:
self.children[0].node.ruleName = leftValue * rightValue
elif type == "int":
self.children[0].node.ruleName = int(leftValue * rightValue)
elif type == "float":
self.children[0].node.ruleName = float(leftValue * rightValue)
else:
self.children[0].node.ruleName = int(leftValue * rightValue)
temp = symbolTable.get_symbol(varName, scope)
newArr = ["int", temp[1], temp[2]]
symbolTable.symbol_tables[scope][varName] = newArr
self.children.pop()
self.children.pop()