Added address flow builder, and type constraint generator.

llpython/type_flow.py

@@ -0,0 +1,220 @@
+#! /usr/bin/env python
+# ______________________________________________________________________
+# Module imports
+
+from .bytecode_visitor import BasicBlockVisitor, BenignBytecodeVisitorMixin
+
+# ______________________________________________________________________
+# Class definition(s)
+
+class TypeFlowBuilder(BenignBytecodeVisitorMixin, BasicBlockVisitor):
+    def __init__(self, co_obj, *args, **kws):
+        super(TypeFlowBuilder, self).__init__(*args, **kws)
+        self.co_obj = co_obj
+        self.locals = {}
+        self.globals = {}
+        self.refs = {}
+        self.type_flow = {}
+        self.requirements = {}
+
+    def get_type_eqns(self):
+        return self.type_flow, self.requirements, self.locals, self.globals
+
+    def _op(self, i, op, opname, arg, args, *extras, **kws):
+        self.type_flow[i] = set(args)
+
+    op_BINARY_ADD = _op
+    op_BINARY_AND = _op
+    op_BINARY_DIVIDE = _op
+    op_BINARY_FLOOR_DIVIDE = _op
+    op_BINARY_LSHIFT = _op
+    op_BINARY_MODULO = _op
+    op_BINARY_MULTIPLY = _op
+    op_BINARY_OR = _op
+    op_BINARY_POWER = _op
+    op_BINARY_RSHIFT = _op
+    op_BINARY_SUBSCR = _op
+    op_BINARY_SUBTRACT = _op
+    op_BINARY_TRUE_DIVIDE = _op
+    op_BINARY_XOR = _op
+
+    #op_BUILD_CLASS = _do_nothing
+    #op_BUILD_LIST = _do_nothing
+    #op_BUILD_MAP = _do_nothing
+    #op_BUILD_SET = _do_nothing
+    #op_BUILD_SLICE = _do_nothing
+    #op_BUILD_TUPLE = _do_nothing
+
+    #op_CALL_FUNCTION = _do_nothing
+    #op_CALL_FUNCTION_KW = _do_nothing
+    #op_CALL_FUNCTION_VAR = _do_nothing
+    #op_CALL_FUNCTION_VAR_KW = _do_nothing
+
+    def op_COMPARE_OP(self, i, op, opname, arg, args, *extras, **kws):
+        self.requirements[i] = set(args)
+        self.type_flow[i] = bool
+
+    #op_CONTINUE_LOOP = _do_nothing
+    #op_DELETE_ATTR = _do_nothing
+    #op_DELETE_DEREF = _do_nothing
+    #op_DELETE_FAST = _do_nothing
+    #op_DELETE_GLOBAL = _do_nothing
+    #op_DELETE_NAME = _do_nothing
+    #op_DELETE_SLICE = _do_nothing
+    #op_DELETE_SUBSCR = _do_nothing
+    #op_END_FINALLY = _do_nothing
+    #op_EXEC_STMT = _do_nothing
+    #op_EXTENDED_ARG = _do_nothing
+    #op_FOR_ITER = _do_nothing
+    #op_GET_ITER = _do_nothing
+    #op_IMPORT_FROM = _do_nothing
+    #op_IMPORT_NAME = _do_nothing
+    #op_IMPORT_STAR = _do_nothing
+
+    op_INPLACE_ADD = _op
+    op_INPLACE_AND = _op
+    op_INPLACE_DIVIDE = _op
+    op_INPLACE_FLOOR_DIVIDE = _op
+    op_INPLACE_LSHIFT = _op
+    op_INPLACE_MODULO = _op
+    op_INPLACE_MULTIPLY = _op
+    op_INPLACE_OR = _op
+    op_INPLACE_POWER = _op
+    op_INPLACE_RSHIFT = _op
+    op_INPLACE_SUBTRACT = _op
+    op_INPLACE_TRUE_DIVIDE = _op
+    op_INPLACE_XOR = _op
+
+    #op_JUMP_ABSOLUTE = _do_nothing
+    #op_JUMP_FORWARD = _do_nothing
+    #op_JUMP_IF_FALSE = _do_nothing
+    #op_JUMP_IF_FALSE_OR_POP = _do_nothing
+    #op_JUMP_IF_TRUE = _do_nothing
+    #op_JUMP_IF_TRUE_OR_POP = _do_nothing
+    #op_LIST_APPEND = _do_nothing
+    #op_LOAD_ATTR = _do_nothing
+    #op_LOAD_BUILD_CLASS = _do_nothing
+    #op_LOAD_CLOSURE = _do_nothing
+
+    def op_LOAD_CONST(self, i, op, opname, arg, args, *extras, **kws):
+        self.type_flow[i] = type(self.co_obj.co_consts[arg])
+
+    def op_LOAD_DEREF(self, i, op, opname, arg, args, *extras, **kws):
+        if arg not in self.refs:
+            result = set(('inref%d' % arg,))
+            self.refs[arg] = result
+        else:
+            result = self.refs[arg]
+        self.type_flow[i] = result
+
+    def op_LOAD_FAST(self, i, op, opname, arg, args, *extras, **kws):
+        if arg not in self.locals:
+            if arg < self.co_obj.co_argcount:
+                result = set(('in%d' % arg,))
+            else:
+                result = set()
+            self.locals[arg] = result
+        else:
+            result = self.locals[arg]
+        self.type_flow[i] = result
+
+    def op_LOAD_GLOBAL(self, i, op, opname, arg, args, *extras, **kws):
+        if arg not in self.globals:
+            result = set(('in%d' % arg,))
+            self.globals[arg] = result
+        else:
+            result = self.globals[arg]
+        self.type_flow[i] = result
+
+    #op_LOAD_LOCALS = _do_nothing
+    #op_LOAD_NAME = _do_nothing
+    #op_MAKE_CLOSURE = _do_nothing
+    #op_MAKE_FUNCTION = _do_nothing
+    #op_MAP_ADD = _do_nothing
+    #op_NOP = _do_nothing
+    #op_POP_BLOCK = _do_nothing
+    #op_POP_EXCEPT = _do_nothing
+    #op_POP_JUMP_IF_FALSE = _do_nothing
+    #op_POP_JUMP_IF_TRUE = _do_nothing
+    #op_POP_TOP = _do_nothing
+    #op_PRINT_EXPR = _do_nothing
+    #op_PRINT_ITEM = _do_nothing
+    #op_PRINT_ITEM_TO = _do_nothing
+    #op_PRINT_NEWLINE = _do_nothing
+    #op_PRINT_NEWLINE_TO = _do_nothing
+    #op_RAISE_VARARGS = _do_nothing
+
+    op_RETURN_VALUE = _op
+
+    #op_SETUP_EXCEPT = _do_nothing
+    #op_SETUP_FINALLY = _do_nothing
+    #op_SETUP_LOOP = _do_nothing
+    #op_SETUP_WITH = _do_nothing
+    #op_SET_ADD = _do_nothing
+
+    #op_SLICE = _do_nothing
+
+    #op_STOP_CODE = _do_nothing
+    #op_STORE_ATTR = _do_nothing
+    #op_STORE_DEREF = _do_nothing
+
+    def op_STORE_FAST(self, i, op, opname, arg, args, *extras, **kws):
+        if arg not in self.locals:
+            if arg < self.co_obj.co_argcount:
+                result = set(('in%d' % arg,))
+            else:
+                result = set()
+            self.locals[arg] = result
+        else:
+            result = self.locals[arg]
+        assert len(args) == 1
+        result.add(args[0])
+
+    #op_STORE_GLOBAL = _do_nothing
+    #op_STORE_LOCALS = _do_nothing
+    #op_STORE_MAP = _do_nothing
+    #op_STORE_NAME = _do_nothing
+    #op_STORE_SLICE = _do_nothing
+    #op_STORE_SUBSCR = _do_nothing
+
+    op_UNARY_CONVERT = _op
+    op_UNARY_INVERT = _op
+    op_UNARY_NEGATIVE = _op
+    op_UNARY_NOT = _op
+    op_UNARY_POSITIVE = _op
+
+    #op_UNPACK_EX = _do_nothing
+    #op_UNPACK_SEQUENCE = _do_nothing
+    #op_WITH_CLEANUP = _do_nothing
+    #op_YIELD_VALUE = _do_nothing
+
+# ______________________________________________________________________
+# Function definition(s)
+
+def build_type_flow(func):
+    from .opcode_util import get_code_object
+    from .addr_flow import build_addr_flow
+    blocks = build_addr_flow(func)
+    ty_builder = TypeFlowBuilder(get_code_object(func))
+    ty_builder.visit(blocks)
+    return ty_builder.get_type_eqns()
+
+# ______________________________________________________________________
+# Main (self-test) routine
+
+def main(*args):
+    import pprint
+    from .tests import llfuncs
+    if not args:
+        args = ('pymod',)
+    for arg in args:
+        pprint.pprint(build_type_flow(getattr(llfuncs, arg)))
+
+# ______________________________________________________________________
+
+if __name__ == "__main__":
+    import sys
+    main(*sys.argv[1:])
+
+# ______________________________________________________________________
+# End of type_flow.py