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transforms.devirtualizer.MethodResolver: implement.

This commit is contained in:
whitequark 2015-10-07 22:32:46 +03:00
parent 6ac82e1439
commit 962dd9de13
1 changed files with 31 additions and 6 deletions

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@ -6,11 +6,11 @@ Devirtualization is implemented using a lattice
with three states: unknown assigned once diverges. with three states: unknown assigned once diverges.
The lattice is computed individually for every The lattice is computed individually for every
variable in scope as well as every variable in scope as well as every
(constructor type, field name) pair. (instance type, field name) pair.
""" """
from pythonparser import algorithm from pythonparser import algorithm
from .. import ir, types from .. import asttyped, ir, types
def _advance(target_map, key, value): def _advance(target_map, key, value):
if key not in target_map: if key not in target_map:
@ -80,13 +80,38 @@ class FunctionResolver(algorithm.Visitor):
self.variable_map[node] = self.scope_map[key] self.variable_map[node] = self.scope_map[key]
self.queue.append(thunk) self.queue.append(thunk)
class MethodResolver(algorithm.Visitor):
def __init__(self, variable_map, method_map):
self.variable_map = variable_map
self.method_map = method_map
# embedding.Stitcher.finalize generates initialization statements
# of form "constructor.meth = meth_body".
def visit_Assign(self, node):
if node.value not in self.variable_map:
return
value = self.variable_map[node.value]
for target in node.targets:
if isinstance(target, asttyped.AttributeT):
if types.is_constructor(target.value.type):
instance_type = target.value.type.instance
elif types.is_instance(target.value.type):
instance_type = target.value.type
else:
continue
_advance(self.method_map, (instance_type, target.attr), value)
class Devirtualizer: class Devirtualizer:
def __init__(self): def __init__(self):
self.variable_map = dict() self.variable_map = dict()
self.method_map = dict() self.method_map = dict()
def visit(self, node): def visit(self, node):
resolver = FunctionResolver(self.variable_map) function_resolver = FunctionResolver(self.variable_map)
resolver.visit(node) function_resolver.visit(node)
resolver.finalize() function_resolver.finalize()
# print(self.variable_map)
method_resolver = MethodResolver(self.variable_map, self.method_map)
method_resolver.visit(node)
print(self.method_map)