forked from M-Labs/artiq
transforms.artiq_ir_generator: add support for user-defined context managers.
This commit is contained in:
whitequark
parent
d633c8e1f8
commit
6a6d7dab19
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@ -555,7 +555,7 @@ class ARTIQIRGenerator(algorithm.Visitor):
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def visit_Continue(self, node):
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self.append(ir.Branch(self.continue_target))
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def raise_exn(self, exn, loc=None):
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def raise_exn(self, exn=None, loc=None):
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if self.final_branch is not None:
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raise_proxy = self.add_block("try.raise")
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self.final_branch(raise_proxy, self.current_block)
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@ -718,19 +718,34 @@ class ARTIQIRGenerator(algorithm.Visitor):
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if not post_handler.is_terminated():
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post_handler.append(ir.Branch(tail))
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def visit_With(self, node):
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if len(node.items) != 1:
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diag = diagnostic.Diagnostic("fatal",
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"only one expression per 'with' statement is supported",
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{"type": types.TypePrinter().name(typ)},
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node.context_expr.loc)
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self.engine.process(diag)
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def _try_finally(self, body_gen, finally_gen, name):
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dispatcher = self.add_block("{}.dispatch".format(name))
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try:
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old_unwind, self.unwind_target = self.unwind_target, dispatcher
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body_gen()
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finally:
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self.unwind_target = old_unwind
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if not self.current_block.is_terminated():
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finally_gen()
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self.post_body = self.current_block
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self.current_block = self.add_block("{}.cleanup".format(name))
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dispatcher.append(ir.LandingPad(self.current_block))
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finally_gen()
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self.raise_exn()
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self.current_block = self.post_body
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def visit_With(self, node):
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context_expr_node = node.items[0].context_expr
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optional_vars_node = node.items[0].optional_vars
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if types.is_builtin(context_expr_node.type, "sequential"):
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self.visit(node.body)
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return
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elif types.is_builtin(context_expr_node.type, "parallel"):
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parallel = self.append(ir.Parallel([]))
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@ -748,32 +763,44 @@ class ARTIQIRGenerator(algorithm.Visitor):
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for tail in tails:
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if not tail.is_terminated():
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tail.append(ir.Branch(self.current_block))
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elif isinstance(context_expr_node, asttyped.CallT) and \
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types.is_builtin(context_expr_node.func.type, "watchdog"):
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timeout = self.visit(context_expr_node.args[0])
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timeout_ms = self.append(ir.Arith(ast.Mult(loc=None), timeout,
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ir.Constant(1000, builtins.TFloat())))
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timeout_ms_int = self.append(ir.Coerce(timeout_ms, builtins.TInt32()))
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return
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watchdog = self.append(ir.Builtin("watchdog_set", [timeout_ms_int], builtins.TInt32()))
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cleanup = []
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for item_node in node.items:
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context_expr_node = item_node.context_expr
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optional_vars_node = item_node.optional_vars
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dispatcher = self.add_block("watchdog.dispatch")
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if isinstance(context_expr_node, asttyped.CallT) and \
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types.is_builtin(context_expr_node.func.type, "watchdog"):
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timeout = self.visit(context_expr_node.args[0])
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timeout_ms = self.append(ir.Arith(ast.Mult(loc=None), timeout,
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ir.Constant(1000, builtins.TFloat())))
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timeout_ms_int = self.append(ir.Coerce(timeout_ms, builtins.TInt32()))
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try:
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old_unwind, self.unwind_target = self.unwind_target, dispatcher
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self.visit(node.body)
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finally:
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self.unwind_target = old_unwind
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watchdog_id = self.append(ir.Builtin("watchdog_set", [timeout_ms_int],
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builtins.TInt32()))
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cleanup.append(lambda:
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self.append(ir.Builtin("watchdog_clear", [watchdog_id], builtins.TNone())))
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else: # user-defined context manager
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context_mgr = self.visit(context_expr_node)
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enter_fn = self._get_attribute(context_mgr, '__enter__')
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exit_fn = self._get_attribute(context_mgr, '__exit__')
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cleanup = self.add_block('watchdog.cleanup')
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landingpad = dispatcher.append(ir.LandingPad(cleanup))
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cleanup.append(ir.Builtin("watchdog_clear", [watchdog], builtins.TNone()))
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cleanup.append(ir.Reraise(self.unwind_target))
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try:
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self.current_assign = self._user_call(enter_fn, [], {})
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if optional_vars_node is not None:
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self.visit(optional_vars_node)
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finally:
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self.current_assign = None
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if not self.current_block.is_terminated():
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self.append(ir.Builtin("watchdog_clear", [watchdog], builtins.TNone()))
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else:
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assert False
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none = self.append(ir.Alloc([], builtins.TNone()))
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cleanup.append(lambda:
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self._user_call(exit_fn, [none, none, none], {}))
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self._try_finally(
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body_gen=lambda: self.visit(node.body),
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finally_gen=lambda: [thunk() for thunk in cleanup],
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name="with")
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# Expression visitors
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# These visitors return a node in addition to mutating
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@ -850,14 +877,8 @@ class ARTIQIRGenerator(algorithm.Visitor):
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else:
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return self._set_local(node.id, self.current_assign)
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def visit_AttributeT(self, node):
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try:
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old_assign, self.current_assign = self.current_assign, None
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obj = self.visit(node.value)
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finally:
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self.current_assign = old_assign
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if node.attr not in obj.type.find().attributes:
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def _get_attribute(self, obj, attr_name):
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if attr_name not in obj.type.find().attributes:
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# A class attribute. Get the constructor (class object) and
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# extract the attribute from it.
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constr_type = obj.type.constructor
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@ -865,16 +886,26 @@ class ARTIQIRGenerator(algorithm.Visitor):
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constr_type.name, constr_type,
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name="constructor." + constr_type.name))
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if types.is_function(constr.type.attributes[node.attr]):
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if types.is_function(constr.type.attributes[attr_name]):
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# A method. Construct a method object instead.
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func = self.append(ir.GetAttr(constr, node.attr))
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return self.append(ir.Alloc([func, obj], node.type))
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func = self.append(ir.GetAttr(constr, attr_name))
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return self.append(ir.Alloc([func, obj],
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types.TMethod(obj.type, func.type)))
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else:
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obj = constr
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return self.append(ir.GetAttr(obj, attr_name,
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name="{}.{}".format(_readable_name(obj), attr_name)))
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def visit_AttributeT(self, node):
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try:
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old_assign, self.current_assign = self.current_assign, None
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obj = self.visit(node.value)
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finally:
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self.current_assign = old_assign
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if self.current_assign is None:
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return self.append(ir.GetAttr(obj, node.attr,
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name="{}.{}".format(_readable_name(obj), node.attr)))
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return self._get_attribute(obj, node.attr)
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elif types.is_rpc_function(self.current_assign.type):
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# RPC functions are just type-level markers
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return self.append(ir.Builtin("nop", [], builtins.TNone()))
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@ -1624,8 +1655,70 @@ class ARTIQIRGenerator(algorithm.Visitor):
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node.loc)
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self.engine.process(diag)
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def _user_call(self, callee, positional, keywords, arg_exprs={}):
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if types.is_function(callee.type):
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func = callee
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self_arg = None
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fn_typ = callee.type
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offset = 0
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elif types.is_method(callee.type):
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func = self.append(ir.GetAttr(callee, "__func__"))
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self_arg = self.append(ir.GetAttr(callee, "__self__"))
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fn_typ = types.get_method_function(callee.type)
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offset = 1
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else:
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assert False
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args = [None] * (len(fn_typ.args) + len(fn_typ.optargs))
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for index, arg in enumerate(positional):
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if index + offset < len(fn_typ.args):
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args[index + offset] = arg
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else:
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args[index + offset] = self.append(ir.Alloc([arg], ir.TOption(arg.type)))
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for keyword in keywords:
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arg = keywords[keyword]
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if keyword in fn_typ.args:
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for index, arg_name in enumerate(fn_typ.args):
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if keyword == arg_name:
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assert args[index] is None
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args[index] = arg
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break
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elif keyword in fn_typ.optargs:
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for index, optarg_name in enumerate(fn_typ.optargs):
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if keyword == optarg_name:
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assert args[len(fn_typ.args) + index] is None
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args[len(fn_typ.args) + index] = \
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self.append(ir.Alloc([arg], ir.TOption(arg.type)))
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break
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for index, optarg_name in enumerate(fn_typ.optargs):
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if args[len(fn_typ.args) + index] is None:
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args[len(fn_typ.args) + index] = \
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self.append(ir.Alloc([], ir.TOption(fn_typ.optargs[optarg_name])))
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if self_arg is not None:
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assert args[0] is None
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args[0] = self_arg
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assert None not in args
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if self.unwind_target is None:
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insn = self.append(ir.Call(func, args, arg_exprs))
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else:
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after_invoke = self.add_block()
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insn = self.append(ir.Invoke(func, args, arg_exprs,
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after_invoke, self.unwind_target))
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self.current_block = after_invoke
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return insn
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def visit_CallT(self, node):
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typ = node.func.type.find()
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if not types.is_builtin(node.func.type):
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callee = self.visit(node.func)
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args = [self.visit(arg_node) for arg_node in node.args]
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keywords = {kw_node.arg: self.visit(kw_node.value) for kw_node in node.keywords}
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if node.iodelay is not None and not iodelay.is_const(node.iodelay, 0):
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before_delay = self.current_block
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@ -1633,68 +1726,11 @@ class ARTIQIRGenerator(algorithm.Visitor):
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before_delay.append(ir.Branch(during_delay))
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self.current_block = during_delay
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if types.is_builtin(typ):
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if types.is_builtin(node.func.type):
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insn = self.visit_builtin_call(node)
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else:
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if types.is_function(typ):
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func = self.visit(node.func)
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self_arg = None
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fn_typ = typ
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offset = 0
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elif types.is_method(typ):
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method = self.visit(node.func)
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func = self.append(ir.GetAttr(method, "__func__"))
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self_arg = self.append(ir.GetAttr(method, "__self__"))
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fn_typ = types.get_method_function(typ)
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offset = 1
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else:
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assert False
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insn = self._user_call(callee, args, keywords, node.arg_exprs)
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args = [None] * (len(fn_typ.args) + len(fn_typ.optargs))
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for index, arg_node in enumerate(node.args):
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arg = self.visit(arg_node)
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if index + offset < len(fn_typ.args):
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args[index + offset] = arg
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else:
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args[index + offset] = self.append(ir.Alloc([arg], ir.TOption(arg.type)))
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for keyword in node.keywords:
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arg = self.visit(keyword.value)
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if keyword.arg in fn_typ.args:
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for index, arg_name in enumerate(fn_typ.args):
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if keyword.arg == arg_name:
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assert args[index] is None
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args[index] = arg
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break
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elif keyword.arg in fn_typ.optargs:
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for index, optarg_name in enumerate(fn_typ.optargs):
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if keyword.arg == optarg_name:
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assert args[len(fn_typ.args) + index] is None
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args[len(fn_typ.args) + index] = \
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self.append(ir.Alloc([arg], ir.TOption(arg.type)))
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break
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for index, optarg_name in enumerate(fn_typ.optargs):
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if args[len(fn_typ.args) + index] is None:
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args[len(fn_typ.args) + index] = \
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self.append(ir.Alloc([], ir.TOption(fn_typ.optargs[optarg_name])))
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if self_arg is not None:
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assert args[0] is None
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args[0] = self_arg
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assert None not in args
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if self.unwind_target is None:
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insn = self.append(ir.Call(func, args, node.arg_exprs))
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else:
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after_invoke = self.add_block()
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insn = self.append(ir.Invoke(func, args, node.arg_exprs,
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after_invoke, self.unwind_target))
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self.current_block = after_invoke
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method_key = None
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if isinstance(node.func, asttyped.AttributeT):
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attr_node = node.func
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self.method_map[(attr_node.value.type.find(), attr_node.attr)].append(insn)
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@ -0,0 +1,33 @@
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# RUN: %python -m artiq.compiler.testbench.jit %s
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# RUN: %python %s
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class contextmgr:
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def __enter__(self):
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print(2)
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def __exit__(self, n1, n2, n3):
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print(4)
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# CHECK-L: a 1
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# CHECK-L: 2
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# CHECK-L: a 3
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# CHECK-L: 4
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# CHECK-L: a 5
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print("a", 1)
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with contextmgr():
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print("a", 3)
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print("a", 5)
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# CHECK-L: b 1
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# CHECK-L: 2
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# CHECK-L: 4
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# CHECK-L: b 6
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try:
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print("b", 1)
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with contextmgr():
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[0][1]
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print("b", 3)
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print("b", 5)
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except:
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pass
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print("b", 6)
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