def fromList(self, l):
dfg = DataFlowGraph()
for nodeDict in l:
node = DFGNode()
node.fromDict(nodeDict)
dfg.nodes.insert(node.id, node)
for node in dfg.nodes:
children = node.children
for index, childId in enumerate(children):
children[index] = dfg.get(childId)
parents = node.parents
for index, parentId in enumerate(parents):
parents[index] = dfg.get(parentId)
return dfg
class DFGGenerator:
def __init__(self):
self.symTable = {}
self.iterTable = {}
self.constTable = {}
self.linkTable = {}
self.gradientTable = {}
self.dfg = DataFlowGraph()
self.funcTypeTable = {}
self.parseTree = None
def create(self, tree):
self.parseTree = tree
self.dfg = DataFlowGraph()
#self.funcTypeTable = {}
# Create source and sink nodes first.
source = DFGNode()
source.operation = 'source'
self.dfg.add(source)
sink = DFGNode()
sink.operation = 'sink'
sink.dist2sink = 0
self.dfg.add(sink)
# Create hash tables for Data_Declarations
# print("******Before DFG******")
self.constTable = self.createConstTable()
self.iterTable = self.createIterTable(self.constTable)
self.symTable, self.gradientTable = self.createSymbolTable(
self.constTable)
self.funcTypeTable = self.createFuncTypeTable()
# print('const table',self.constTable)
# print('iter table',self.iterTable)
# print('symTable',self.symTable)
# print('funcTypeTable',self.funcTypeTable)
# print('gradientTable', self.gradientTable)
# print("================================\n\n")
# Get statList for all Stats
statList = self.parseTree.getChild(1)
# Creation of DFG.
if statList.children is not None:
for stat in statList.children:
resultNodes = self.statTraversal(stat)
# Append SGD
for g in self.linkTable:
leftBound = g.find("[") + 1
rightBound = g.rfind("]")
iterList = g[leftBound:rightBound].split('][')
for i in range(len(iterList)):
if not iterList[i].isdigit():
iterList[i] = self.constTable[iterList[i]]
if len(iterList) is 0:
mult = DFGNode()
mult.operation = "*"
#mult.dataType = 'gradient'
mult.dataType = None
self.dfg.add(mult)
self.connectNode(self.symTable[g], mult)
self.connectNode(symTable["mu"], mult)
sub = DFGNode()
sub.operation = "-"
sub.dataType = 'model'
self.dfg.add(sub)
self.connectNode(mult, sub)
self.connectNode(self.symTable[self.linkTable[g]], sub)
self.symTable[self.symTable[self.linkTable[g]]] = sub
else:
for i in range(iterList[0]):
if len(iterList) is 1:
gSym = g[0:g.find('[')] + '[' + str(i) + ']'
#print(gSym)
if gSym in self.symTable:
mult = DFGNode()
mult.operation = "*"
#mult.dataType = 'gradient'
mult.dataType = None
self.dfg.add(mult)
self.connectNode(self.symTable[gSym], mult)
self.connectNode(self.symTable["mu"], mult)
sub = DFGNode()
sub.operation = "-"
sub.dataType = 'model'
self.dfg.add(sub)
wSym = self.linkTable[g] + '[' + str(i) + ']'
self.connectNode(mult, sub)
self.connectNode(self.symTable[wSym], sub)
self.symTable[wSym] = sub
else:
for j in range(iterList[1]):
gSym = g[0:g.find('[')] + '[' + str(
i) + '][' + str(j) + ']'
if gSym in self.symTable:
mult = DFGNode()
mult.operation = "*"
#mult.dataType = 'gradient'
mult.dataType = None
self.dfg.add(mult)
self.connectNode(self.symTable[gSym], mult)
self.connectNode(self.symTable["mu"], mult)
sub = DFGNode()
sub.operation = "-"
sub.dataType = 'model'
self.dfg.add(sub)
wSym = self.linkTable[g] + '[' + str(
i) + '][' + str(j) + ']'
self.connectNode(mult, sub)
self.connectNode(self.symTable[wSym], sub)
self.symTable[wSym] = sub
# Needs to connect correct outputs to the sink node
for node in self.symTable.values(): # Connect outputs
if len(node.children) is 0 and len(node.parents) is not 1:
self.connectNode(node, self.dfg.get(1))
# Calculates all the distances to sink
self.setDist2sink(sink)
# Remove useless nodes
# self.dfg.updateId()
removedNodes = []
for node in self.dfg.nodes:
if node.dist2sink is None:
for child in node.children:
child.parents.remove(node)
for parent in node.parents:
parent.children.remove(node)
removedNodes.append(node)
for node in removedNodes:
self.dfg.remove(node)
# Print and save
self.dfg.updateId()
# for val in self.dfg.nodes:
# print(val)
# print("******After DFG******")
# print('const table',self.constTable)
# print('iter table',self.iterTable)
# print('symTable',self.symTable)
# self.dfg.save('./dfg.json')
return self.dfg
def writeTo(self, dfg, path):
dfg.save(path)
def statTraversal(self, statNode):
# print(statNode.getText())
leftHS = statNode.getChild(0).getText()
var = leftHS[0:leftHS.find("[")]
# dimensions of left hs var - could be up to two
dimensions = statNode.getChild(0).getChild(0).getChild(
1).getText()[1:-1].split("][")
arr = []
# Single Assignment
if dimensions[0] is '' or dimensions[0].isdigit():
iterDict = {}
resultNode = self.exprTraversal(statNode.getChild(2), iterDict)
self.symTable[leftHS] = resultNode
arr.append(resultNode)
else:
# Currently only handles 2-d arrays
iter0 = self.iterTable[dimensions[0]]
iter1 = self.iterTable[
dimensions[1]] if len(dimensions) > 1 else None
for i in range(iter0[0], iter0[1]):
iterDict = {dimensions[0]: i}
if iter1 is not None: # result is two dimensional array
for j in range(iter1[0], iter1[1]):
iterDict[dimensions[1]] = j
resultNode = self.exprTraversal(
statNode.getChild(2), iterDict)
# color
if var in self.gradientTable:
#resultNode.dataType = 'gradient'
resultNode.dataType = 'gradient'
self.symTable[var + '[' + str(i) + '][' + str(j) +
']'] = resultNode
arr.append(resultNode)
else:
resultNode = self.exprTraversal(statNode.getChild(2),
iterDict)
# color
#print('debug...statTraversal...var is: ', var)
#print('debug...statTraversal...var type is: ', type(var))
#print('debug...statTraversal...gradientTable is: ', self.gradientTable)
if var in self.gradientTable:
#resultNode.dataType = 'gradient'
resultNode.dataType = None
self.symTable[var + '[' + str(i) + ']'] = resultNode
arr.append(resultNode)
return arr
def exprTraversal(self, exprNode, iterDict):
# print('exprTraversal ' + exprNode.getText())
if exprNode.getChild(1).children is not None:
node = self.term2TailTraversal(exprNode.getChild(1),
iterDict) # Go into term2Tail
leftParent = self.term2Traversal(exprNode.getChild(0), iterDict)
self.connectNode(leftParent, node)
else:
node = self.term2Traversal(exprNode.getChild(0), iterDict)
return node
def term2TailTraversal(self, currTerm2Tail, iterDict):
# print('term2TailTraversal ' + currTerm2Tail.getText())
node = DFGNode()
node.operation = currTerm2Tail.getChild(0).getText()
if currTerm2Tail.getChild(2).children is not None:
rightParent = self.term2TailTraversal(currTerm2Tail.getChild(2),
iterDict)
rightLeftParent = self.term2Traversal(currTerm2Tail.getChild(1),
iterDict)
self.connectNode(rightLeftParent, rightParent)
else:
rightParent = self.term2Traversal(currTerm2Tail.getChild(1),
iterDict)
self.dfg.add(node)
self.connectNode(rightParent, node)
return node
def term2Traversal(self, term2Node, iterDict):
# print('term2Traversal ' + term2Node.getText())
if term2Node.getChild(1).children is not None:
node = self.term1TailTraversal(term2Node.getChild(1), iterDict)
leftParent = self.term1Traversal(term2Node.getChild(0), iterDict)
self.connectNode(leftParent, node)
else:
node = self.term1Traversal(term2Node.getChild(0), iterDict)
return node
def term1TailTraversal(self, currTerm1Tail, iterDict):
# print('term1TailTraversal ' + currTerm1Tail.getText())
node = DFGNode()
node.operation = currTerm1Tail.getChild(0).getText()
if currTerm1Tail.getChild(2).children is not None:
rightParent = self.term1TailTraversal(currTerm1Tail.getChild(2),
iterDict)
rightLeftParent = self.term1Traversal(currTerm1Tail.getChild(1),
iterDict)
self.connectNode(rightLeftParent, rightParent)
else:
rightParent = self.term1Traversal(currTerm1Tail.getChild(1),
iterDict)
self.dfg.add(node)
self.connectNode(rightParent, node)
return node
def term1Traversal(self, term1Node, iterDict):
# print('term1Traversal ' + term1Node.getText())
if term1Node.getChild(1).children is not None:
node = self.term0TailTraversal(term1Node.getChild(1), iterDict)
leftParent = self.term0Traversal(term1Node.getChild(0), iterDict)
self.connectNode(leftParent, node)
else:
node = self.term0Traversal(term1Node.getChild(0), iterDict)
return node
def term0TailTraversal(self, currTerm0Tail, iterDict):
# print('term0TailTraversal ' + currTerm0Tail.getText())
node = DFGNode()
node.operation = currTerm0Tail.getChild(0).getText()
if currTerm0Tail.getChild(2).children is not None:
rightParent = self.term0TailTraversal(currTerm0Tail.getChild(2),
iterDict)
rightLeftParent = self.term0Traversal(currTerm0Tail.getChild(1),
iterDict)
self.connectNode(rightLeftParent, rightParent)
else:
rightParent = self.term0Traversal(currTerm0Tail.getChild(1),
iterDict)
self.dfg.add(node)
self.connectNode(rightParent, node)
return node
def term0Traversal(self, currTerm0, iterDict):
# print('term0Traversal ' + currTerm0.getText())
if len(currTerm0.children) == 3: # expr child
return self.exprTraversal(currTerm0.getChild(1), iterDict)
elif len(currTerm0.children) == 2: # func child
return self.funcTraversal(currTerm0, iterDict)
elif currTerm0.getChild(0).getText().isdigit(): # INTLIT
digit = currTerm0.getChild(0).getText()
int(currTerm0.getChild(0).getText())
# Create seperate node for numerical values that are connected to the src.
if digit in self.symTable:
return self.symTable[digit]
else:
node = DFGNode()
node.operation = digit
node.dataType = 'constant'
self.dfg.add(node)
self.connectNode(self.dfg.get(0), node)
self.symTable[digit] = node
return node
else: # ID
var = currTerm0.getText()
leftBound = var.find("[") + 1
rightBound = var.rfind("]")
if rightBound == -1: # Weird Mathematical constant symbols like lambda
return self.symTable[var]
# Getting exact iteration instance. ie. a[0][2]
iterList = var[leftBound:rightBound].split('][')
key = var[:var.find('[')]
for it in iterList: # replace [i] with iteration value
key = key + '[' + str(iterDict[it]) + ']'
return self.symTable[key]
def funcTraversal(self, currTerm0, iterDict):
# print('funcTraversal ' + currTerm0.getText())
numParents = int(self.funcTypeTable[currTerm0.getChild(0).getText()])
if numParents == 1:
return self.funcSingleParentTraversal(currTerm0, iterDict)
else:
return self.funcMultiParentTraversal(currTerm0, iterDict)
def funcSingleParentTraversal(self, currTerm0, iterDict):
node = DFGNode()
node.operation = currTerm0.getChild(0).getText()
parent = self.exprTraversal(
currTerm0.getChild(1).getChild(1), iterDict)
self.dfg.add(node)
self.connectNode(parent, node)
return node
def funcMultiParentTraversal(self, currTerm0, iterDict):
funcArgs = currTerm0.getChild(1)
funcRangeIterator = funcArgs.getChild(1).getText()
funcIterations = self.iterTable[funcRangeIterator]
funcVals = []
funcDict = iterDict
# Calculates all expressions
for i in range(funcIterations[0], funcIterations[1]):
funcDict[funcRangeIterator] = i
funcVals.append(self.exprTraversal(funcArgs.getChild(4), funcDict))
functionType = currTerm0.getChild(0).getText()
operator = '+' if (functionType == 'sum' or functionType
== 'norm') else ('*' if
(functionType == 'pi') else '')
if functionType == 'norm': # We square the output expression and sum
x = []
for val in funcVals:
node = DFGNode()
node.operation = '*'
self.dfg.add(node)
self.connectNode(val, node)
self.connectNode(val, node)
x.append(node)
funcVals = x
# Combines nodes in list with operator node
# and inserts operator node back in list
# while (len(funcVals) > 1):
# # print(len(funcVals))
# left = funcVals.pop(0)
# right = funcVals.pop(0)
# node = DFGNode()
# node.operation = operator
# self.dfg.add(node)
# self.connectNode(right, node)
# self.connectNode(left, node)
# funcVals.append(node)
while len(funcVals) > 1:
funcVals_tmp = []
while len(funcVals) >= 2:
left = funcVals.pop(0)
right = funcVals.pop(0)
node = DFGNode()
node.operation = operator
self.dfg.add(node)
self.connectNode(right, node)
self.connectNode(left, node)
funcVals_tmp.append(node)
if len(funcVals) == 1:
funcVals_tmp.append(funcVals.pop(0))
funcVals = funcVals_tmp
return funcVals.pop(0)
def createConstTable(self):
constTable = {}
dataDecList = self.parseTree.getChild(0)
for dataDec in dataDecList.getChildren():
dataType = dataDec.getChild(0)
if dataType.ASSIGN() is not None:
x = int(dataType.INTLIT().getText())
constTable[dataType.ID().getText()] = x
return constTable
def createIterTable(self, constTable):
iterTable = {}
dataDecList = self.parseTree.getChild(0)
for dataDec in dataDecList.getChildren():
dataType = dataDec.getChild(0)
if dataType.ASSIGN() is None and dataType.getChild(
0).getText() == 'iterator':
key = dataType.getChild(1).getChild(0).getText()
val1 = dataType.getChild(1).getChild(2).getText()
val2 = dataType.getChild(1).getChild(4).getText()
if val1.isdigit():
val1 = int(val1)
else:
val1 = constTable[val1]
if val2.isdigit():
val2 = int(val2)
else:
val2 = constTable[val2]
iterTable[key] = (val1, val2)
return iterTable
def createSymbolTable(self, constTable):
symTable = {}
gradientTable = {} # color
for const in constTable.keys():
node = DFGNode()
node.operation = const
node.dataType = 'constant'
self.dfg.add(node)
self.connectNode(self.dfg.get(0), node)
symTable[const] = node
dataDecList = self.parseTree.getChild(0)
for dataDec in dataDecList.getChildren():
dataType = dataDec.getChild(0)
if dataType.getChild(
0).getText() != 'iterator' and dataType.ASSIGN(
) is None: # means non_iterator (like model_input)
x = dataType.getChild(1).getText().strip().split(",")
if dataType.GRADIENT() is not None:
for d in x:
link = dataType.getChild(1).getText().strip().split(
'->')
gradVar = link[0]
modelVar = link[1]
self.linkTable[gradVar] = modelVar
gradKey = gradVar[:gradVar.find('[')] #color
#print(gradKey)
gradientTable[gradKey] = True #color
#print('debug', gradientTable)
else: # means either model_input, model_output, or model
# Array of vars. ex. ['#1[#0]', '#2[#0]']
for d in x:
if (d.find("[") is -1): # a single variable
symTable[d] = 0
node = DFGNode()
node.operation = d
node.dataType = dataType.getChild(0).getText()
self.dfg.add(node)
self.connectNode(self.dfg.get(0), node)
symTable[d] = node
else:
iterList = d[d.find("[") + 1:-1].split(
'][') # gets id within brackets
if iterList[0].isdigit():
iter0 = int(iterList[0])
else:
iter0 = constTable[iterList[0]]
for i in range(
iter0): # statically just one dimension
stringKey = '' + d[:d.find("[")] + '[' + str(
i) + ']'
if len(iterList) > 1:
if iterList[1].isdigit():
iter1 = int(iterList[1])
else:
iter1 = constTable[iterList[1]]
for j in range(iter1):
stringKeyTwo = stringKey + '[' + str(
j) + ']'
node = DFGNode()
node.operation = stringKeyTwo
node.dataType = dataType.getChild(
0).getText()
self.dfg.add(node)
self.connectNode(self.dfg.get(0), node)
symTable[stringKeyTwo] = node
else:
node = DFGNode()
node.operation = stringKey
node.dataType = dataType.getChild(
0).getText()
self.dfg.add(node)
self.connectNode(self.dfg.get(0), node)
symTable[stringKey] = node
#print('after createSymbolTable()...', gradientTable)
return (symTable, gradientTable)
def createFuncTypeTable(self):
x = {}
# 2 = multi parents
# 1 = 1 parent
x['pi'] = 2
x['sum'] = 2
x['norm'] = 2
x['gaussian'] = 1
x['sigmoid'] = 1
x['sig_sym'] = 1
x['log'] = 1
return x
def connectNode(self, parent, child):
child.parents.insert(0, parent)
parent.children.append(child)
def setDist2sink(self, currNode):
for parent in currNode.parents:
if parent.dist2sink is None or parent.dist2sink < currNode.dist2sink + 1:
parent.dist2sink = currNode.dist2sink + 1
self.setDist2sink(parent)