You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
526 lines
20 KiB
526 lines
20 KiB
3 years ago
|
import dis
|
||
|
|
import unittest
|
||
|
|
|
||
|
|
from test.support.bytecode_helper import BytecodeTestCase
|
||
|
|
|
||
|
|
|
||
|
|
def count_instr_recursively(f, opname):
|
||
|
|
count = 0
|
||
|
|
for instr in dis.get_instructions(f):
|
||
|
|
if instr.opname == opname:
|
||
|
|
count += 1
|
||
|
|
if hasattr(f, '__code__'):
|
||
|
|
f = f.__code__
|
||
|
|
for c in f.co_consts:
|
||
|
|
if hasattr(c, 'co_code'):
|
||
|
|
count += count_instr_recursively(c, opname)
|
||
|
|
return count
|
||
|
|
|
||
|
|
|
||
|
|
class TestTranforms(BytecodeTestCase):
|
||
|
|
|
||
|
|
def check_jump_targets(self, code):
|
||
|
|
instructions = list(dis.get_instructions(code))
|
||
|
|
targets = {instr.offset: instr for instr in instructions}
|
||
|
|
for instr in instructions:
|
||
|
|
if 'JUMP_' not in instr.opname:
|
||
|
|
continue
|
||
|
|
tgt = targets[instr.argval]
|
||
|
|
# jump to unconditional jump
|
||
|
|
if tgt.opname in ('JUMP_ABSOLUTE', 'JUMP_FORWARD'):
|
||
|
|
self.fail(f'{instr.opname} at {instr.offset} '
|
||
|
|
f'jumps to {tgt.opname} at {tgt.offset}')
|
||
|
|
# unconditional jump to RETURN_VALUE
|
||
|
|
if (instr.opname in ('JUMP_ABSOLUTE', 'JUMP_FORWARD') and
|
||
|
|
tgt.opname == 'RETURN_VALUE'):
|
||
|
|
self.fail(f'{instr.opname} at {instr.offset} '
|
||
|
|
f'jumps to {tgt.opname} at {tgt.offset}')
|
||
|
|
# JUMP_IF_*_OR_POP jump to conditional jump
|
||
|
|
if '_OR_POP' in instr.opname and 'JUMP_IF_' in tgt.opname:
|
||
|
|
self.fail(f'{instr.opname} at {instr.offset} '
|
||
|
|
f'jumps to {tgt.opname} at {tgt.offset}')
|
||
|
|
|
||
|
|
def check_lnotab(self, code):
|
||
|
|
"Check that the lnotab byte offsets are sensible."
|
||
|
|
code = dis._get_code_object(code)
|
||
|
|
lnotab = list(dis.findlinestarts(code))
|
||
|
|
# Don't bother checking if the line info is sensible, because
|
||
|
|
# most of the line info we can get at comes from lnotab.
|
||
|
|
min_bytecode = min(t[0] for t in lnotab)
|
||
|
|
max_bytecode = max(t[0] for t in lnotab)
|
||
|
|
self.assertGreaterEqual(min_bytecode, 0)
|
||
|
|
self.assertLess(max_bytecode, len(code.co_code))
|
||
|
|
# This could conceivably test more (and probably should, as there
|
||
|
|
# aren't very many tests of lnotab), if peepholer wasn't scheduled
|
||
|
|
# to be replaced anyway.
|
||
|
|
|
||
|
|
def test_unot(self):
|
||
|
|
# UNARY_NOT POP_JUMP_IF_FALSE --> POP_JUMP_IF_TRUE'
|
||
|
|
def unot(x):
|
||
|
|
if not x == 2:
|
||
|
|
del x
|
||
|
|
self.assertNotInBytecode(unot, 'UNARY_NOT')
|
||
|
|
self.assertNotInBytecode(unot, 'POP_JUMP_IF_FALSE')
|
||
|
|
self.assertInBytecode(unot, 'POP_JUMP_IF_TRUE')
|
||
|
|
self.check_lnotab(unot)
|
||
|
|
|
||
|
|
def test_elim_inversion_of_is_or_in(self):
|
||
|
|
for line, cmp_op, invert in (
|
||
|
|
('not a is b', 'IS_OP', 1,),
|
||
|
|
('not a is not b', 'IS_OP', 0,),
|
||
|
|
('not a in b', 'CONTAINS_OP', 1,),
|
||
|
|
('not a not in b', 'CONTAINS_OP', 0,),
|
||
|
|
):
|
||
|
|
code = compile(line, '', 'single')
|
||
|
|
self.assertInBytecode(code, cmp_op, invert)
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
def test_global_as_constant(self):
|
||
|
|
# LOAD_GLOBAL None/True/False --> LOAD_CONST None/True/False
|
||
|
|
def f():
|
||
|
|
x = None
|
||
|
|
x = None
|
||
|
|
return x
|
||
|
|
def g():
|
||
|
|
x = True
|
||
|
|
return x
|
||
|
|
def h():
|
||
|
|
x = False
|
||
|
|
return x
|
||
|
|
|
||
|
|
for func, elem in ((f, None), (g, True), (h, False)):
|
||
|
|
self.assertNotInBytecode(func, 'LOAD_GLOBAL')
|
||
|
|
self.assertInBytecode(func, 'LOAD_CONST', elem)
|
||
|
|
self.check_lnotab(func)
|
||
|
|
|
||
|
|
def f():
|
||
|
|
'Adding a docstring made this test fail in Py2.5.0'
|
||
|
|
return None
|
||
|
|
|
||
|
|
self.assertNotInBytecode(f, 'LOAD_GLOBAL')
|
||
|
|
self.assertInBytecode(f, 'LOAD_CONST', None)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_while_one(self):
|
||
|
|
# Skip over: LOAD_CONST trueconst POP_JUMP_IF_FALSE xx
|
||
|
|
def f():
|
||
|
|
while 1:
|
||
|
|
pass
|
||
|
|
return list
|
||
|
|
for elem in ('LOAD_CONST', 'POP_JUMP_IF_FALSE'):
|
||
|
|
self.assertNotInBytecode(f, elem)
|
||
|
|
for elem in ('JUMP_ABSOLUTE',):
|
||
|
|
self.assertInBytecode(f, elem)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_pack_unpack(self):
|
||
|
|
for line, elem in (
|
||
|
|
('a, = a,', 'LOAD_CONST',),
|
||
|
|
('a, b = a, b', 'ROT_TWO',),
|
||
|
|
('a, b, c = a, b, c', 'ROT_THREE',),
|
||
|
|
):
|
||
|
|
code = compile(line,'','single')
|
||
|
|
self.assertInBytecode(code, elem)
|
||
|
|
self.assertNotInBytecode(code, 'BUILD_TUPLE')
|
||
|
|
self.assertNotInBytecode(code, 'UNPACK_TUPLE')
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
def test_folding_of_tuples_of_constants(self):
|
||
|
|
for line, elem in (
|
||
|
|
('a = 1,2,3', (1, 2, 3)),
|
||
|
|
('("a","b","c")', ('a', 'b', 'c')),
|
||
|
|
('a,b,c = 1,2,3', (1, 2, 3)),
|
||
|
|
('(None, 1, None)', (None, 1, None)),
|
||
|
|
('((1, 2), 3, 4)', ((1, 2), 3, 4)),
|
||
|
|
):
|
||
|
|
code = compile(line,'','single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', elem)
|
||
|
|
self.assertNotInBytecode(code, 'BUILD_TUPLE')
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
# Long tuples should be folded too.
|
||
|
|
code = compile(repr(tuple(range(10000))),'','single')
|
||
|
|
self.assertNotInBytecode(code, 'BUILD_TUPLE')
|
||
|
|
# One LOAD_CONST for the tuple, one for the None return value
|
||
|
|
load_consts = [instr for instr in dis.get_instructions(code)
|
||
|
|
if instr.opname == 'LOAD_CONST']
|
||
|
|
self.assertEqual(len(load_consts), 2)
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
# Bug 1053819: Tuple of constants misidentified when presented with:
|
||
|
|
# . . . opcode_with_arg 100 unary_opcode BUILD_TUPLE 1 . . .
|
||
|
|
# The following would segfault upon compilation
|
||
|
|
def crater():
|
||
|
|
(~[
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
|
||
|
|
],)
|
||
|
|
self.check_lnotab(crater)
|
||
|
|
|
||
|
|
def test_folding_of_lists_of_constants(self):
|
||
|
|
for line, elem in (
|
||
|
|
# in/not in constants with BUILD_LIST should be folded to a tuple:
|
||
|
|
('a in [1,2,3]', (1, 2, 3)),
|
||
|
|
('a not in ["a","b","c"]', ('a', 'b', 'c')),
|
||
|
|
('a in [None, 1, None]', (None, 1, None)),
|
||
|
|
('a not in [(1, 2), 3, 4]', ((1, 2), 3, 4)),
|
||
|
|
):
|
||
|
|
code = compile(line, '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', elem)
|
||
|
|
self.assertNotInBytecode(code, 'BUILD_LIST')
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
def test_folding_of_sets_of_constants(self):
|
||
|
|
for line, elem in (
|
||
|
|
# in/not in constants with BUILD_SET should be folded to a frozenset:
|
||
|
|
('a in {1,2,3}', frozenset({1, 2, 3})),
|
||
|
|
('a not in {"a","b","c"}', frozenset({'a', 'c', 'b'})),
|
||
|
|
('a in {None, 1, None}', frozenset({1, None})),
|
||
|
|
('a not in {(1, 2), 3, 4}', frozenset({(1, 2), 3, 4})),
|
||
|
|
('a in {1, 2, 3, 3, 2, 1}', frozenset({1, 2, 3})),
|
||
|
|
):
|
||
|
|
code = compile(line, '', 'single')
|
||
|
|
self.assertNotInBytecode(code, 'BUILD_SET')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', elem)
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
# Ensure that the resulting code actually works:
|
||
|
|
def f(a):
|
||
|
|
return a in {1, 2, 3}
|
||
|
|
|
||
|
|
def g(a):
|
||
|
|
return a not in {1, 2, 3}
|
||
|
|
|
||
|
|
self.assertTrue(f(3))
|
||
|
|
self.assertTrue(not f(4))
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
self.assertTrue(not g(3))
|
||
|
|
self.assertTrue(g(4))
|
||
|
|
self.check_lnotab(g)
|
||
|
|
|
||
|
|
|
||
|
|
def test_folding_of_binops_on_constants(self):
|
||
|
|
for line, elem in (
|
||
|
|
('a = 2+3+4', 9), # chained fold
|
||
|
|
('"@"*4', '@@@@'), # check string ops
|
||
|
|
('a="abc" + "def"', 'abcdef'), # check string ops
|
||
|
|
('a = 3**4', 81), # binary power
|
||
|
|
('a = 3*4', 12), # binary multiply
|
||
|
|
('a = 13//4', 3), # binary floor divide
|
||
|
|
('a = 14%4', 2), # binary modulo
|
||
|
|
('a = 2+3', 5), # binary add
|
||
|
|
('a = 13-4', 9), # binary subtract
|
||
|
|
('a = (12,13)[1]', 13), # binary subscr
|
||
|
|
('a = 13 << 2', 52), # binary lshift
|
||
|
|
('a = 13 >> 2', 3), # binary rshift
|
||
|
|
('a = 13 & 7', 5), # binary and
|
||
|
|
('a = 13 ^ 7', 10), # binary xor
|
||
|
|
('a = 13 | 7', 15), # binary or
|
||
|
|
):
|
||
|
|
code = compile(line, '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', elem)
|
||
|
|
for instr in dis.get_instructions(code):
|
||
|
|
self.assertFalse(instr.opname.startswith('BINARY_'))
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
# Verify that unfoldables are skipped
|
||
|
|
code = compile('a=2+"b"', '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', 2)
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', 'b')
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
# Verify that large sequences do not result from folding
|
||
|
|
code = compile('a="x"*10000', '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', 10000)
|
||
|
|
self.assertNotIn("x"*10000, code.co_consts)
|
||
|
|
self.check_lnotab(code)
|
||
|
|
code = compile('a=1<<1000', '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', 1000)
|
||
|
|
self.assertNotIn(1<<1000, code.co_consts)
|
||
|
|
self.check_lnotab(code)
|
||
|
|
code = compile('a=2**1000', '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', 1000)
|
||
|
|
self.assertNotIn(2**1000, code.co_consts)
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
def test_binary_subscr_on_unicode(self):
|
||
|
|
# valid code get optimized
|
||
|
|
code = compile('"foo"[0]', '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', 'f')
|
||
|
|
self.assertNotInBytecode(code, 'BINARY_SUBSCR')
|
||
|
|
self.check_lnotab(code)
|
||
|
|
code = compile('"\u0061\uffff"[1]', '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', '\uffff')
|
||
|
|
self.assertNotInBytecode(code,'BINARY_SUBSCR')
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
# With PEP 393, non-BMP char get optimized
|
||
|
|
code = compile('"\U00012345"[0]', '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', '\U00012345')
|
||
|
|
self.assertNotInBytecode(code, 'BINARY_SUBSCR')
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
# invalid code doesn't get optimized
|
||
|
|
# out of range
|
||
|
|
code = compile('"fuu"[10]', '', 'single')
|
||
|
|
self.assertInBytecode(code, 'BINARY_SUBSCR')
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
def test_folding_of_unaryops_on_constants(self):
|
||
|
|
for line, elem in (
|
||
|
|
('-0.5', -0.5), # unary negative
|
||
|
|
('-0.0', -0.0), # -0.0
|
||
|
|
('-(1.0-1.0)', -0.0), # -0.0 after folding
|
||
|
|
('-0', 0), # -0
|
||
|
|
('~-2', 1), # unary invert
|
||
|
|
('+1', 1), # unary positive
|
||
|
|
):
|
||
|
|
code = compile(line, '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', elem)
|
||
|
|
for instr in dis.get_instructions(code):
|
||
|
|
self.assertFalse(instr.opname.startswith('UNARY_'))
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
# Check that -0.0 works after marshaling
|
||
|
|
def negzero():
|
||
|
|
return -(1.0-1.0)
|
||
|
|
|
||
|
|
for instr in dis.get_instructions(negzero):
|
||
|
|
self.assertFalse(instr.opname.startswith('UNARY_'))
|
||
|
|
self.check_lnotab(negzero)
|
||
|
|
|
||
|
|
# Verify that unfoldables are skipped
|
||
|
|
for line, elem, opname in (
|
||
|
|
('-"abc"', 'abc', 'UNARY_NEGATIVE'),
|
||
|
|
('~"abc"', 'abc', 'UNARY_INVERT'),
|
||
|
|
):
|
||
|
|
code = compile(line, '', 'single')
|
||
|
|
self.assertInBytecode(code, 'LOAD_CONST', elem)
|
||
|
|
self.assertInBytecode(code, opname)
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
def test_elim_extra_return(self):
|
||
|
|
# RETURN LOAD_CONST None RETURN --> RETURN
|
||
|
|
def f(x):
|
||
|
|
return x
|
||
|
|
self.assertNotInBytecode(f, 'LOAD_CONST', None)
|
||
|
|
returns = [instr for instr in dis.get_instructions(f)
|
||
|
|
if instr.opname == 'RETURN_VALUE']
|
||
|
|
self.assertEqual(len(returns), 1)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_elim_jump_to_return(self):
|
||
|
|
# JUMP_FORWARD to RETURN --> RETURN
|
||
|
|
def f(cond, true_value, false_value):
|
||
|
|
# Intentionally use two-line expression to test issue37213.
|
||
|
|
return (true_value if cond
|
||
|
|
else false_value)
|
||
|
|
self.check_jump_targets(f)
|
||
|
|
self.assertNotInBytecode(f, 'JUMP_FORWARD')
|
||
|
|
self.assertNotInBytecode(f, 'JUMP_ABSOLUTE')
|
||
|
|
returns = [instr for instr in dis.get_instructions(f)
|
||
|
|
if instr.opname == 'RETURN_VALUE']
|
||
|
|
self.assertEqual(len(returns), 2)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_elim_jump_to_uncond_jump(self):
|
||
|
|
# POP_JUMP_IF_FALSE to JUMP_FORWARD --> POP_JUMP_IF_FALSE to non-jump
|
||
|
|
def f():
|
||
|
|
if a:
|
||
|
|
# Intentionally use two-line expression to test issue37213.
|
||
|
|
if (c
|
||
|
|
or d):
|
||
|
|
foo()
|
||
|
|
else:
|
||
|
|
baz()
|
||
|
|
self.check_jump_targets(f)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_elim_jump_to_uncond_jump2(self):
|
||
|
|
# POP_JUMP_IF_FALSE to JUMP_ABSOLUTE --> POP_JUMP_IF_FALSE to non-jump
|
||
|
|
def f():
|
||
|
|
while a:
|
||
|
|
# Intentionally use two-line expression to test issue37213.
|
||
|
|
if (c
|
||
|
|
or d):
|
||
|
|
a = foo()
|
||
|
|
self.check_jump_targets(f)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_elim_jump_to_uncond_jump3(self):
|
||
|
|
# Intentionally use two-line expressions to test issue37213.
|
||
|
|
# JUMP_IF_FALSE_OR_POP to JUMP_IF_FALSE_OR_POP --> JUMP_IF_FALSE_OR_POP to non-jump
|
||
|
|
def f(a, b, c):
|
||
|
|
return ((a and b)
|
||
|
|
and c)
|
||
|
|
self.check_jump_targets(f)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
self.assertEqual(count_instr_recursively(f, 'JUMP_IF_FALSE_OR_POP'), 2)
|
||
|
|
# JUMP_IF_TRUE_OR_POP to JUMP_IF_TRUE_OR_POP --> JUMP_IF_TRUE_OR_POP to non-jump
|
||
|
|
def f(a, b, c):
|
||
|
|
return ((a or b)
|
||
|
|
or c)
|
||
|
|
self.check_jump_targets(f)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
self.assertEqual(count_instr_recursively(f, 'JUMP_IF_TRUE_OR_POP'), 2)
|
||
|
|
# JUMP_IF_FALSE_OR_POP to JUMP_IF_TRUE_OR_POP --> POP_JUMP_IF_FALSE to non-jump
|
||
|
|
def f(a, b, c):
|
||
|
|
return ((a and b)
|
||
|
|
or c)
|
||
|
|
self.check_jump_targets(f)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
self.assertNotInBytecode(f, 'JUMP_IF_FALSE_OR_POP')
|
||
|
|
self.assertInBytecode(f, 'JUMP_IF_TRUE_OR_POP')
|
||
|
|
self.assertInBytecode(f, 'POP_JUMP_IF_FALSE')
|
||
|
|
# JUMP_IF_TRUE_OR_POP to JUMP_IF_FALSE_OR_POP --> POP_JUMP_IF_TRUE to non-jump
|
||
|
|
def f(a, b, c):
|
||
|
|
return ((a or b)
|
||
|
|
and c)
|
||
|
|
self.check_jump_targets(f)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
self.assertNotInBytecode(f, 'JUMP_IF_TRUE_OR_POP')
|
||
|
|
self.assertInBytecode(f, 'JUMP_IF_FALSE_OR_POP')
|
||
|
|
self.assertInBytecode(f, 'POP_JUMP_IF_TRUE')
|
||
|
|
|
||
|
|
def test_elim_jump_after_return1(self):
|
||
|
|
# Eliminate dead code: jumps immediately after returns can't be reached
|
||
|
|
def f(cond1, cond2):
|
||
|
|
if cond1: return 1
|
||
|
|
if cond2: return 2
|
||
|
|
while 1:
|
||
|
|
return 3
|
||
|
|
while 1:
|
||
|
|
if cond1: return 4
|
||
|
|
return 5
|
||
|
|
return 6
|
||
|
|
self.assertNotInBytecode(f, 'JUMP_FORWARD')
|
||
|
|
self.assertNotInBytecode(f, 'JUMP_ABSOLUTE')
|
||
|
|
returns = [instr for instr in dis.get_instructions(f)
|
||
|
|
if instr.opname == 'RETURN_VALUE']
|
||
|
|
self.assertLessEqual(len(returns), 6)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_make_function_doesnt_bail(self):
|
||
|
|
def f():
|
||
|
|
def g()->1+1:
|
||
|
|
pass
|
||
|
|
return g
|
||
|
|
self.assertNotInBytecode(f, 'BINARY_ADD')
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_constant_folding(self):
|
||
|
|
# Issue #11244: aggressive constant folding.
|
||
|
|
exprs = [
|
||
|
|
'3 * -5',
|
||
|
|
'-3 * 5',
|
||
|
|
'2 * (3 * 4)',
|
||
|
|
'(2 * 3) * 4',
|
||
|
|
'(-1, 2, 3)',
|
||
|
|
'(1, -2, 3)',
|
||
|
|
'(1, 2, -3)',
|
||
|
|
'(1, 2, -3) * 6',
|
||
|
|
'lambda x: x in {(3 * -5) + (-1 - 6), (1, -2, 3) * 2, None}',
|
||
|
|
]
|
||
|
|
for e in exprs:
|
||
|
|
code = compile(e, '', 'single')
|
||
|
|
for instr in dis.get_instructions(code):
|
||
|
|
self.assertFalse(instr.opname.startswith('UNARY_'))
|
||
|
|
self.assertFalse(instr.opname.startswith('BINARY_'))
|
||
|
|
self.assertFalse(instr.opname.startswith('BUILD_'))
|
||
|
|
self.check_lnotab(code)
|
||
|
|
|
||
|
|
def test_in_literal_list(self):
|
||
|
|
def containtest():
|
||
|
|
return x in [a, b]
|
||
|
|
self.assertEqual(count_instr_recursively(containtest, 'BUILD_LIST'), 0)
|
||
|
|
self.check_lnotab(containtest)
|
||
|
|
|
||
|
|
def test_iterate_literal_list(self):
|
||
|
|
def forloop():
|
||
|
|
for x in [a, b]:
|
||
|
|
pass
|
||
|
|
self.assertEqual(count_instr_recursively(forloop, 'BUILD_LIST'), 0)
|
||
|
|
self.check_lnotab(forloop)
|
||
|
|
|
||
|
|
def test_condition_with_binop_with_bools(self):
|
||
|
|
def f():
|
||
|
|
if True or False:
|
||
|
|
return 1
|
||
|
|
return 0
|
||
|
|
self.assertEqual(f(), 1)
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_if_with_if_expression(self):
|
||
|
|
# Check bpo-37289
|
||
|
|
def f(x):
|
||
|
|
if (True if x else False):
|
||
|
|
return True
|
||
|
|
return False
|
||
|
|
self.assertTrue(f(True))
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_trailing_nops(self):
|
||
|
|
# Check the lnotab of a function that even after trivial
|
||
|
|
# optimization has trailing nops, which the lnotab adjustment has to
|
||
|
|
# handle properly (bpo-38115).
|
||
|
|
def f(x):
|
||
|
|
while 1:
|
||
|
|
return 3
|
||
|
|
while 1:
|
||
|
|
return 5
|
||
|
|
return 6
|
||
|
|
self.check_lnotab(f)
|
||
|
|
|
||
|
|
def test_assignment_idiom_in_comprehensions(self):
|
||
|
|
def listcomp():
|
||
|
|
return [y for x in a for y in [f(x)]]
|
||
|
|
self.assertEqual(count_instr_recursively(listcomp, 'FOR_ITER'), 1)
|
||
|
|
def setcomp():
|
||
|
|
return {y for x in a for y in [f(x)]}
|
||
|
|
self.assertEqual(count_instr_recursively(setcomp, 'FOR_ITER'), 1)
|
||
|
|
def dictcomp():
|
||
|
|
return {y: y for x in a for y in [f(x)]}
|
||
|
|
self.assertEqual(count_instr_recursively(dictcomp, 'FOR_ITER'), 1)
|
||
|
|
def genexpr():
|
||
|
|
return (y for x in a for y in [f(x)])
|
||
|
|
self.assertEqual(count_instr_recursively(genexpr, 'FOR_ITER'), 1)
|
||
|
|
|
||
|
|
|
||
|
|
class TestBuglets(unittest.TestCase):
|
||
|
|
|
||
|
|
def test_bug_11510(self):
|
||
|
|
# folded constant set optimization was commingled with the tuple
|
||
|
|
# unpacking optimization which would fail if the set had duplicate
|
||
|
|
# elements so that the set length was unexpected
|
||
|
|
def f():
|
||
|
|
x, y = {1, 1}
|
||
|
|
return x, y
|
||
|
|
with self.assertRaises(ValueError):
|
||
|
|
f()
|
||
|
|
|
||
|
|
def test_bpo_42057(self):
|
||
|
|
for i in range(10):
|
||
|
|
try:
|
||
|
|
raise Exception
|
||
|
|
except Exception or Exception:
|
||
|
|
pass
|
||
|
|
|
||
|
|
def test_bpo_45773_pop_jump_if_true(self):
|
||
|
|
compile("while True or spam: pass", "<test>", "exec")
|
||
|
|
|
||
|
|
def test_bpo_45773_pop_jump_if_false(self):
|
||
|
|
compile("while True or not spam: pass", "<test>", "exec")
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
unittest.main()
|