def generate_bin_op_forward_only_wrapper(fn: FuncIR,
emitter: Emitter,
gen: 'WrapperGenerator') -> None:
gen.emit_arg_processing(error=GotoHandler('typefail'), raise_exception=False)
gen.emit_call(not_implemented_handler='goto typefail;')
gen.emit_error_handling()
emitter.emit_label('typefail')
# If some argument has an incompatible type, treat this the same as
# returning NotImplemented, and try to call the reverse operator method.
#
# Note that in normal Python you'd instead of an explicit
# return of NotImplemented, but it doesn't generally work here
# the body won't be executed at all if there is an argument
# type check failure.
#
# The recommended way is to still use a type check in the
# body. This will only be used in interpreted mode:
#
# def __add__(self, other: int) -> Foo:
# if not isinstance(other, int):
# return NotImplemented
# ...
rmethod = reverse_op_methods[fn.name]
emitter.emit_line('_Py_IDENTIFIER({});'.format(rmethod))
emitter.emit_line(
'return CPy_CallReverseOpMethod(obj_left, obj_right, "{}", &PyId_{});'.format(
op_methods_to_symbols[fn.name],
rmethod))
gen.finish()
def generate_bin_op_reverse_only_wrapper(emitter: Emitter,
gen: 'WrapperGenerator') -> None:
gen.arg_names = ['right', 'left']
gen.emit_arg_processing(error=GotoHandler('typefail'), raise_exception=False)
gen.emit_call()
gen.emit_error_handling()
emitter.emit_label('typefail')
emitter.emit_line('Py_INCREF(Py_NotImplemented);')
emitter.emit_line('return Py_NotImplemented;')
gen.finish()
def generate_wrapper_core(fn: FuncIR,
emitter: Emitter,
optional_args: Optional[List[RuntimeArg]] = None,
arg_names: Optional[List[str]] = None,
cleanups: Optional[List[str]] = None,
traceback_code: Optional[str] = None) -> None:
"""Generates the core part of a wrapper function for a native function.
This expects each argument as a PyObject * named obj_{arg} as a precondition.
It converts the PyObject *s to the necessary types, checking and unboxing if necessary,
makes the call, then boxes the result if necessary and returns it.
"""
optional_args = optional_args or []
cleanups = cleanups or []
use_goto = bool(cleanups or traceback_code)
error_code = 'return NULL;' if not use_goto else 'goto fail;'
arg_names = arg_names or [arg.name for arg in fn.args]
for arg_name, arg in zip(arg_names, fn.args):
# Suppress the argument check for *args/**kwargs, since we know it must be right.
typ = arg.type if arg.kind not in (ARG_STAR,
ARG_STAR2) else object_rprimitive
generate_arg_check(arg_name, typ, emitter, error_code, arg
in optional_args)
native_args = ', '.join('arg_{}'.format(arg) for arg in arg_names)
if fn.ret_type.is_unboxed or use_goto:
# TODO: The Py_RETURN macros return the correct PyObject * with reference count handling.
# Are they relevant?
emitter.emit_line('{}retval = {}{}({});'.format(
emitter.ctype_spaced(fn.ret_type), NATIVE_PREFIX,
fn.cname(emitter.names), native_args))
emitter.emit_lines(*cleanups)
if fn.ret_type.is_unboxed:
emitter.emit_error_check('retval', fn.ret_type, 'return NULL;')
emitter.emit_box('retval',
'retbox',
fn.ret_type,
declare_dest=True)
emitter.emit_line('return {};'.format(
'retbox' if fn.ret_type.is_unboxed else 'retval'))
else:
emitter.emit_line('return {}{}({});'.format(NATIVE_PREFIX,
fn.cname(emitter.names),
native_args))
# TODO: Tracebacks?
if use_goto:
emitter.emit_label('fail')
emitter.emit_lines(*cleanups)
if traceback_code:
emitter.emit_lines(traceback_code)
emitter.emit_lines('return NULL;')
def generate_native_function(fn: FuncIR, emitter: Emitter, source_path: str,
module_name: str) -> None:
declarations = Emitter(emitter.context)
names = generate_names_for_ir(fn.arg_regs, fn.blocks)
body = Emitter(emitter.context, names)
visitor = FunctionEmitterVisitor(body, declarations, source_path,
module_name)
declarations.emit_line(f'{native_function_header(fn.decl, emitter)} {{')
body.indent()
for r in all_values(fn.arg_regs, fn.blocks):
if isinstance(r.type, RTuple):
emitter.declare_tuple_struct(r.type)
if isinstance(r.type, RArray):
continue # Special: declared on first assignment
if r in fn.arg_regs:
continue # Skip the arguments
ctype = emitter.ctype_spaced(r.type)
init = ''
declarations.emit_line('{ctype}{prefix}{name}{init};'.format(
ctype=ctype, prefix=REG_PREFIX, name=names[r], init=init))
# Before we emit the blocks, give them all labels
blocks = fn.blocks
for i, block in enumerate(blocks):
block.label = i
common = frequently_executed_blocks(fn.blocks[0])
for i in range(len(blocks)):
block = blocks[i]
visitor.rare = block not in common
next_block = None
if i + 1 < len(blocks):
next_block = blocks[i + 1]
body.emit_label(block)
visitor.next_block = next_block
ops = block.ops
visitor.ops = ops
visitor.op_index = 0
while visitor.op_index < len(ops):
ops[visitor.op_index].accept(visitor)
visitor.op_index += 1
body.emit_line('}')
emitter.emit_from_emitter(declarations)
emitter.emit_from_emitter(body)
def generate_set_del_item_wrapper_inner(fn: FuncIR, emitter: Emitter,
args: Sequence[RuntimeArg]) -> None:
for arg in args:
generate_arg_check(arg.name, arg.type, emitter, 'goto fail;', False)
native_args = ', '.join('arg_{}'.format(arg.name) for arg in args)
emitter.emit_line('{}val = {}{}({});'.format(
emitter.ctype_spaced(fn.ret_type), NATIVE_PREFIX,
fn.cname(emitter.names), native_args))
emitter.emit_error_check('val', fn.ret_type, 'goto fail;')
emitter.emit_dec_ref('val', fn.ret_type)
emitter.emit_line('return 0;')
emitter.emit_label('fail')
emitter.emit_line('return -1;')
emitter.emit_line('}')
def generate_native_function(fn: FuncIR,
emitter: Emitter,
source_path: str,
module_name: str,
optimize_int: bool = True) -> None:
if optimize_int:
const_int_regs = find_constant_integer_registers(fn.blocks)
else:
const_int_regs = {}
declarations = Emitter(emitter.context)
names = generate_names_for_ir(fn.arg_regs, fn.blocks)
body = Emitter(emitter.context, names)
visitor = FunctionEmitterVisitor(body, declarations, source_path,
module_name, const_int_regs)
declarations.emit_line('{} {{'.format(
native_function_header(fn.decl, emitter)))
body.indent()
for r in all_values(fn.arg_regs, fn.blocks):
if isinstance(r.type, RTuple):
emitter.declare_tuple_struct(r.type)
if r in fn.arg_regs:
continue # Skip the arguments
ctype = emitter.ctype_spaced(r.type)
init = ''
if r not in const_int_regs:
declarations.emit_line('{ctype}{prefix}{name}{init};'.format(
ctype=ctype, prefix=REG_PREFIX, name=names[r], init=init))
# Before we emit the blocks, give them all labels
for i, block in enumerate(fn.blocks):
block.label = i
for block in fn.blocks:
body.emit_label(block)
for op in block.ops:
op.accept(visitor)
body.emit_line('}')
emitter.emit_from_emitter(declarations)
emitter.emit_from_emitter(body)
def generate_bin_op_both_wrappers(cl: ClassIR,
fn: FuncIR,
fn_rev: FuncIR,
emitter: Emitter,
gen: 'WrapperGenerator') -> None:
# There's both a forward and a reverse operator method. First
# check if we should try calling the forward one. If the
# argument type check fails, fall back to the reverse method.
#
# Similar to above, we can't perfectly match Python semantics.
# In regular Python code you'd return NotImplemented if the
# operand has the wrong type, but in compiled code we'll never
# get to execute the type check.
emitter.emit_line('if (PyObject_IsInstance(obj_left, (PyObject *){})) {{'.format(
emitter.type_struct_name(cl)))
gen.emit_arg_processing(error=GotoHandler('typefail'), raise_exception=False)
gen.emit_call(not_implemented_handler='goto typefail;')
gen.emit_error_handling()
emitter.emit_line('}')
emitter.emit_label('typefail')
emitter.emit_line('if (PyObject_IsInstance(obj_right, (PyObject *){})) {{'.format(
emitter.type_struct_name(cl)))
gen.set_target(fn_rev)
gen.arg_names = ['right', 'left']
gen.emit_arg_processing(error=GotoHandler('typefail2'), raise_exception=False)
gen.emit_call()
gen.emit_error_handling()
emitter.emit_line('} else {')
emitter.emit_line('_Py_IDENTIFIER({});'.format(fn_rev.name))
emitter.emit_line(
'return CPy_CallReverseOpMethod(obj_left, obj_right, "{}", &PyId_{});'.format(
op_methods_to_symbols[fn.name],
fn_rev.name))
emitter.emit_line('}')
emitter.emit_label('typefail2')
emitter.emit_line('Py_INCREF(Py_NotImplemented);')
emitter.emit_line('return Py_NotImplemented;')
gen.finish()
def generate_native_function(fn: FuncIR,
emitter: Emitter,
source_path: str,
module_name: str) -> None:
declarations = Emitter(emitter.context, fn.env)
body = Emitter(emitter.context, fn.env)
visitor = FunctionEmitterVisitor(body, declarations, source_path, module_name)
declarations.emit_line('{} {{'.format(native_function_header(fn.decl, emitter)))
body.indent()
for r, i in fn.env.indexes.items():
if isinstance(r.type, RTuple):
emitter.declare_tuple_struct(r.type)
if i < len(fn.args):
continue # skip the arguments
ctype = emitter.ctype_spaced(r.type)
init = ''
if r in fn.env.vars_needing_init:
init = ' = {}'.format(declarations.c_error_value(r.type))
declarations.emit_line('{ctype}{prefix}{name}{init};'.format(ctype=ctype,
prefix=REG_PREFIX,
name=r.name,
init=init))
# Before we emit the blocks, give them all labels
for i, block in enumerate(fn.blocks):
block.label = i
for block in fn.blocks:
body.emit_label(block)
for op in block.ops:
op.accept(visitor)
body.emit_line('}')
emitter.emit_from_emitter(declarations)
emitter.emit_from_emitter(body)
