def prepare(self):
last_exp = None
for block in self._blocks:
exp = Expression(block, self.tokenizer, self)
self._expressions.append(exp)
if last_exp:
last_exp.next = exp
last_exp = exp
for exp in self._expressions:
exp.tokenize()
self.convert_breaks()
self.convert_jumps()
def setup(self):
self._scope = {}
for index, name in enumerate(self.bytecode.argnames):
self._scope[name] = index
blocks = []
# find LOAD_GLOBALS
gbl = []
for instr in self.bytecode:
if isinstance(instr, Instr) and instr.opcode == pyop.LOAD_GLOBAL:
gbl.append(instr.arg)
# if there are global things passed in
# we want to check if they are used in the method
# and if so, load them in
global_blocks = []
if len(self._extra):
for item in self._extra:
if item[-1].opcode == pyop.STORE_NAME:
if item[-1].arg in gbl:
global_blocks.append(item)
self.add_to_scope(item[-1].arg)
if item[0].opcode == pyop.LOAD_NAME:
item[0].opcode = pyop.LOAD_GLOBAL
blocks = global_blocks
for item in global_blocks:
for instr in item:
if instr.lineno < self.MAX_FILE_LINENO: # many method shared the _extra instruction. so only add once!
instr.lineno = self.MAX_FILE_LINENO + instr.lineno
instructions = []
last_ln = self.bytecode[0].lineno
for instr in self.bytecode:
if not isinstance(instr, Label) and instr.lineno != last_ln:
last_ln = instr.lineno
if len(instructions):
blocks.append(instructions)
instructions = []
if not isinstance(instr,
Label) and instr.opcode == pyop.STORE_FAST:
self.add_to_scope(instr.arg)
instructions.append(instr)
if len(instructions):
blocks.append(instructions)
self._blocks = blocks
method_exp = Expression([], None, self)
method_instr = Instr('NOP')
method_instr.lineno = 1
method_token = PyToken(method_instr, method_exp, None, None)
self.tokenizer = VMTokenizer(self, method_token)
self._expressions = []