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test_opt.py
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5025 lines (4319 loc) · 170 KB
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import contextlib
import itertools
import sys
import textwrap
import unittest
import gc
import os
import types
import _opcode
from test.support import (script_helper, requires_specialization,
import_helper, Py_GIL_DISABLED, requires_jit_enabled,
reset_code)
_testinternalcapi = import_helper.import_module("_testinternalcapi")
from _testinternalcapi import _PY_NSMALLPOSINTS, TIER2_THRESHOLD, TIER2_RESUME_THRESHOLD
#For test of issue 136154
GLOBAL_136154 = 42
# For frozendict JIT tests
FROZEN_DICT_CONST = frozendict(x=1, y=2)
# For frozenset JIT tests
FROZEN_SET_CONST = frozenset({1, 2, 3})
class _GenericKey:
pass
_GENERIC_KEY = _GenericKey()
@contextlib.contextmanager
def clear_executors(func):
# Clear executors in func before and after running a block
reset_code(func)
try:
yield
finally:
reset_code(func)
def get_first_executor(func):
code = func.__code__
co_code = code.co_code
for i in range(0, len(co_code), 2):
try:
return _opcode.get_executor(code, i)
except ValueError:
pass
return None
def get_all_executors(func):
code = func.__code__
co_code = code.co_code
executors = []
for i in range(0, len(co_code), 2):
try:
executors.append(_opcode.get_executor(code, i))
except ValueError:
pass
return executors
def iter_opnames(ex):
for item in ex:
yield item[0]
def get_opnames(ex):
return list(iter_opnames(ex))
def iter_ops(ex):
for item in ex:
yield item
def get_ops(ex):
return list(iter_ops(ex))
def count_ops(ex, name):
return len([opname for opname in iter_opnames(ex) if opname == name])
@requires_specialization
@unittest.skipIf(Py_GIL_DISABLED, "optimizer not yet supported in free-threaded builds")
@requires_jit_enabled
class TestExecutorInvalidation(unittest.TestCase):
def test_invalidate_object(self):
# Generate a new set of functions at each call
ns = {}
func_src = "\n".join(
f"""
def f{n}():
for _ in range({TIER2_THRESHOLD}):
pass
""" for n in range(5)
)
exec(textwrap.dedent(func_src), ns, ns)
funcs = [ ns[f'f{n}'] for n in range(5)]
objects = [object() for _ in range(5)]
for f in funcs:
f()
executors = [get_first_executor(f) for f in funcs]
# Set things up so each executor depends on the objects
# with an equal or lower index.
for i, exe in enumerate(executors):
self.assertTrue(exe.is_valid())
for obj in objects[:i+1]:
_testinternalcapi.add_executor_dependency(exe, obj)
self.assertTrue(exe.is_valid())
# Assert that the correct executors are invalidated
# and check that nothing crashes when we invalidate
# an executor multiple times.
for i in (4,3,2,1,0):
_testinternalcapi.invalidate_executors(objects[i])
for exe in executors[i:]:
self.assertFalse(exe.is_valid())
for exe in executors[:i]:
self.assertTrue(exe.is_valid())
@unittest.skipIf(os.getenv("PYTHON_UOPS_OPTIMIZE") == "0", "Needs uop optimizer to run.")
def test_uop_optimizer_invalidation(self):
# Generate a new function at each call
ns = {}
exec(textwrap.dedent(f"""
def f():
for i in range({TIER2_THRESHOLD}):
pass
"""), ns, ns)
f = ns['f']
f()
exe = get_first_executor(f)
self.assertIsNotNone(exe)
self.assertTrue(exe.is_valid())
_testinternalcapi.invalidate_executors(f.__code__)
self.assertFalse(exe.is_valid())
def test_sys__clear_internal_caches(self):
def f():
for _ in range(TIER2_THRESHOLD):
pass
f()
exe = get_first_executor(f)
self.assertIsNotNone(exe)
self.assertTrue(exe.is_valid())
sys._clear_internal_caches()
self.assertFalse(exe.is_valid())
exe = get_first_executor(f)
self.assertIsNone(exe)
def test_prev_executor_freed_while_tracing(self):
def f(start, end, way):
for x in range(start, end):
# For the first trace, create a bad branch on purpose to trace into.
# A side exit will form from here on the second trace.
y = way + way
if x >= TIER2_THRESHOLD:
# Invalidate the first trace while tracing the second.
_testinternalcapi.invalidate_executors(f.__code__)
_testinternalcapi.clear_executor_deletion_list()
f(0, TIER2_THRESHOLD, 1)
f(1, TIER2_THRESHOLD + 1, 1.0)
def get_bool_guard_ops():
delta = id(True) ^ id(False)
for bit in range(4, 8):
if delta & (1 << bit):
if id(True) & (1 << bit):
return f"_GUARD_BIT_IS_UNSET_POP_{bit}", f"_GUARD_BIT_IS_SET_POP_{bit}"
else:
return f"_GUARD_BIT_IS_SET_POP_{bit}", f"_GUARD_BIT_IS_UNSET_POP_{bit}"
return "_GUARD_IS_FALSE_POP", "_GUARD_IS_TRUE_POP"
@requires_specialization
@unittest.skipIf(Py_GIL_DISABLED, "optimizer not yet supported in free-threaded builds")
@requires_jit_enabled
@unittest.skipIf(os.getenv("PYTHON_UOPS_OPTIMIZE") == "0", "Needs uop optimizer to run.")
class TestUops(unittest.TestCase):
def setUp(self):
self.guard_is_false, self.guard_is_true = get_bool_guard_ops()
def test_basic_loop(self):
def testfunc(x):
i = 0
while i < x:
i += 1
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn("_JUMP_TO_TOP", uops)
self.assertIn("_LOAD_FAST_BORROW_0", uops)
def test_extended_arg(self):
"Check EXTENDED_ARG handling in superblock creation"
ns = {}
exec(textwrap.dedent(f"""
def many_vars():
# 260 vars, so z9 should have index 259
a0 = a1 = a2 = a3 = a4 = a5 = a6 = a7 = a8 = a9 = 42
b0 = b1 = b2 = b3 = b4 = b5 = b6 = b7 = b8 = b9 = 42
c0 = c1 = c2 = c3 = c4 = c5 = c6 = c7 = c8 = c9 = 42
d0 = d1 = d2 = d3 = d4 = d5 = d6 = d7 = d8 = d9 = 42
e0 = e1 = e2 = e3 = e4 = e5 = e6 = e7 = e8 = e9 = 42
f0 = f1 = f2 = f3 = f4 = f5 = f6 = f7 = f8 = f9 = 42
g0 = g1 = g2 = g3 = g4 = g5 = g6 = g7 = g8 = g9 = 42
h0 = h1 = h2 = h3 = h4 = h5 = h6 = h7 = h8 = h9 = 42
i0 = i1 = i2 = i3 = i4 = i5 = i6 = i7 = i8 = i9 = 42
j0 = j1 = j2 = j3 = j4 = j5 = j6 = j7 = j8 = j9 = 42
k0 = k1 = k2 = k3 = k4 = k5 = k6 = k7 = k8 = k9 = 42
l0 = l1 = l2 = l3 = l4 = l5 = l6 = l7 = l8 = l9 = 42
m0 = m1 = m2 = m3 = m4 = m5 = m6 = m7 = m8 = m9 = 42
n0 = n1 = n2 = n3 = n4 = n5 = n6 = n7 = n8 = n9 = 42
o0 = o1 = o2 = o3 = o4 = o5 = o6 = o7 = o8 = o9 = 42
p0 = p1 = p2 = p3 = p4 = p5 = p6 = p7 = p8 = p9 = 42
q0 = q1 = q2 = q3 = q4 = q5 = q6 = q7 = q8 = q9 = 42
r0 = r1 = r2 = r3 = r4 = r5 = r6 = r7 = r8 = r9 = 42
s0 = s1 = s2 = s3 = s4 = s5 = s6 = s7 = s8 = s9 = 42
t0 = t1 = t2 = t3 = t4 = t5 = t6 = t7 = t8 = t9 = 42
u0 = u1 = u2 = u3 = u4 = u5 = u6 = u7 = u8 = u9 = 42
v0 = v1 = v2 = v3 = v4 = v5 = v6 = v7 = v8 = v9 = 42
w0 = w1 = w2 = w3 = w4 = w5 = w6 = w7 = w8 = w9 = 42
x0 = x1 = x2 = x3 = x4 = x5 = x6 = x7 = x8 = x9 = 42
y0 = y1 = y2 = y3 = y4 = y5 = y6 = y7 = y8 = y9 = 42
z0 = z1 = z2 = z3 = z4 = z5 = z6 = z7 = z8 = z9 = {TIER2_THRESHOLD}
while z9 > 0:
z9 = z9 - 1
+z9
"""), ns, ns)
many_vars = ns["many_vars"]
ex = get_first_executor(many_vars)
self.assertIsNone(ex)
many_vars()
ex = get_first_executor(many_vars)
self.assertIsNotNone(ex)
self.assertTrue(any((opcode, oparg, operand) == ("_LOAD_FAST_BORROW", 259, 0)
for opcode, oparg, _, operand in list(ex)))
def test_unspecialized_unpack(self):
# An example of an unspecialized opcode
def testfunc(x):
i = 0
while i < x:
i += 1
a, b = {1: 2, 3: 3}
assert a == 1 and b == 3
i = 0
while i < x:
i += 1
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn("_UNPACK_SEQUENCE", uops)
def test_pop_jump_if_false(self):
def testfunc(n):
i = 0
while i < n:
i += 1
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn(self.guard_is_true, uops)
def test_pop_jump_if_none(self):
def testfunc(a):
for x in a:
if x is None:
x = 0
testfunc(range(TIER2_THRESHOLD))
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertNotIn("_GUARD_IS_NONE_POP", uops)
self.assertNotIn("_GUARD_IS_NOT_NONE_POP", uops)
def test_pop_jump_if_not_none(self):
def testfunc(a):
for x in a:
x = None
if x is not None:
x = 0
testfunc(range(TIER2_THRESHOLD))
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertNotIn("_GUARD_IS_NONE_POP", uops)
self.assertNotIn("_GUARD_IS_NOT_NONE_POP", uops)
def test_pop_jump_if_true(self):
def testfunc(n):
i = 0
while not i >= n:
i += 1
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn(self.guard_is_false, uops)
def test_jump_backward(self):
def testfunc(n):
i = 0
while i < n:
i += 1
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn("_JUMP_TO_TOP", uops)
def test_resume(self):
def testfunc(x):
if x <= 1:
return 1
return testfunc(x-1)
for _ in range((TIER2_RESUME_THRESHOLD + 99)//100):
testfunc(101)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
# 0. _START_EXECUTOR
# 1. _MAKE_WARM
# 2. _TIER2_RESUME_CHECK
self.assertEqual(uops[2], "_TIER2_RESUME_CHECK")
def test_jump_forward(self):
def testfunc(n):
a = 0
while a < n:
if a < 0:
a = -a
else:
a = +a
a += 1
return a
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
# Since there is no JUMP_FORWARD instruction,
# look for indirect evidence: the += operator
self.assertIn("_BINARY_OP_ADD_INT", uops)
def test_for_iter_range(self):
def testfunc(n):
total = 0
for i in range(n):
total += i
return total
total = testfunc(TIER2_THRESHOLD)
self.assertEqual(total, sum(range(TIER2_THRESHOLD)))
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
# for i, (opname, oparg) in enumerate(ex):
# print(f"{i:4d}: {opname:<20s} {oparg:3d}")
uops = get_opnames(ex)
self.assertIn("_GUARD_NOT_EXHAUSTED_RANGE", uops)
# Verification that the jump goes past END_FOR
# is done by manual inspection of the output
def test_for_iter_list(self):
def testfunc(a):
total = 0
for i in a:
total += i
return total
a = list(range(TIER2_THRESHOLD))
total = testfunc(a)
self.assertEqual(total, sum(a))
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
# for i, (opname, oparg) in enumerate(ex):
# print(f"{i:4d}: {opname:<20s} {oparg:3d}")
uops = get_opnames(ex)
self.assertIn("_GUARD_NOT_EXHAUSTED_LIST", uops)
# Verification that the jump goes past END_FOR
# is done by manual inspection of the output
def test_for_iter_tuple(self):
def testfunc(a):
total = 0
for i in a:
total += i
return total
a = tuple(range(TIER2_THRESHOLD))
total = testfunc(a)
self.assertEqual(total, sum(a))
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
# for i, (opname, oparg) in enumerate(ex):
# print(f"{i:4d}: {opname:<20s} {oparg:3d}")
uops = get_opnames(ex)
self.assertIn("_GUARD_NOT_EXHAUSTED_TUPLE", uops)
# Verification that the jump goes past END_FOR
# is done by manual inspection of the output
def test_list_edge_case(self):
def testfunc(it):
for x in it:
pass
a = [1, 2, 3]
it = iter(a)
testfunc(it)
a.append(4)
with self.assertRaises(StopIteration):
next(it)
def test_call_py_exact_args(self):
def testfunc(n):
def dummy(x):
return x+1
for i in range(n):
dummy(i)
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn("_PUSH_FRAME", uops)
self.assertIn("_BINARY_OP_ADD_INT", uops)
def test_call_py_ex(self):
def testfunc(n):
def ex_py(*args, **kwargs):
return 1
for _ in range(n):
args = (1, 2, 3)
kwargs = {}
ex_py(*args, **kwargs)
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn("_PUSH_FRAME", uops)
self.assertIn("_PY_FRAME_EX", uops)
def test_branch_taken(self):
def testfunc(n):
for i in range(n):
if i < 0:
i = 0
else:
i = 1
testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn(self.guard_is_false, uops)
def test_branch_coincident_targets(self):
# test for gh-144681: https://github.com/python/cpython/issues/144681
def testfunc(n):
for _ in range(n):
r = [x for x in range(10) if [].append(x) or True]
return r
res = testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertEqual(res, list(range(10)))
self.assertIsNotNone(ex)
def test_for_iter_tier_two(self):
class MyIter:
def __init__(self, n):
self.n = n
def __iter__(self):
return self
def __next__(self):
self.n -= 1
if self.n < 0:
raise StopIteration
return self.n
def testfunc(n, m):
x = 0
for i in range(m):
for j in MyIter(n):
x += j
return x
x = testfunc(TIER2_THRESHOLD, 2)
self.assertEqual(x, sum(range(TIER2_THRESHOLD)) * 2)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn("_FOR_ITER_TIER_TWO", uops)
@requires_specialization
@unittest.skipIf(Py_GIL_DISABLED, "optimizer not yet supported in free-threaded builds")
@requires_jit_enabled
@unittest.skipIf(os.getenv("PYTHON_UOPS_OPTIMIZE") == "0", "Needs uop optimizer to run.")
class TestUopsOptimization(unittest.TestCase):
def setUp(self):
self.guard_is_false, self.guard_is_true = get_bool_guard_ops()
def _run_with_optimizer(self, testfunc, arg):
res = testfunc(arg)
ex = get_first_executor(testfunc)
return res, ex
def test_int_type_propagation(self):
def testfunc(loops):
num = 0
for i in range(loops):
x = num + num
a = x + 1
num += 1
return a
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertIsNotNone(ex)
self.assertEqual(res, (TIER2_THRESHOLD - 1) * 2 + 1)
binop_count = [opname for opname in iter_opnames(ex) if opname == "_BINARY_OP_ADD_INT"]
guard_tos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_INT"]
guard_nos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_INT"]
self.assertGreaterEqual(len(binop_count), 3)
self.assertLessEqual(len(guard_tos_int_count), 1)
self.assertLessEqual(len(guard_nos_int_count), 1)
def test_int_type_propagation_through_frame(self):
def double(x):
return x + x
def testfunc(loops):
num = 0
for i in range(loops):
x = num + num
a = double(x)
num += 1
return a
res = testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
self.assertEqual(res, (TIER2_THRESHOLD - 1) * 4)
binop_count = [opname for opname in iter_opnames(ex) if opname == "_BINARY_OP_ADD_INT"]
guard_tos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_INT"]
guard_nos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_INT"]
self.assertGreaterEqual(len(binop_count), 3)
self.assertLessEqual(len(guard_tos_int_count), 1)
self.assertLessEqual(len(guard_nos_int_count), 1)
def test_int_type_propagation_from_frame(self):
def double(x):
return x + x
def testfunc(loops):
num = 0
for i in range(loops):
a = double(num)
x = a + a
num += 1
return x
res = testfunc(TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
self.assertIsNotNone(ex)
self.assertEqual(res, (TIER2_THRESHOLD - 1) * 4)
binop_count = [opname for opname in iter_opnames(ex) if opname == "_BINARY_OP_ADD_INT"]
guard_tos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_INT"]
guard_nos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_INT"]
self.assertGreaterEqual(len(binop_count), 3)
self.assertLessEqual(len(guard_tos_int_count), 1)
self.assertLessEqual(len(guard_nos_int_count), 1)
def test_int_impure_region(self):
def testfunc(loops):
num = 0
while num < loops:
x = num + num
y = 1
x // 2
a = x + y
num += 1
return a
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertIsNotNone(ex)
binop_count = [opname for opname in iter_opnames(ex) if opname == "_BINARY_OP_ADD_INT"]
self.assertGreaterEqual(len(binop_count), 3)
def test_call_py_exact_args(self):
def testfunc(n):
def dummy(x):
return x+1
for i in range(n):
dummy(i)
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn("_PUSH_FRAME", uops)
self.assertIn("_BINARY_OP_ADD_INT", uops)
self.assertNotIn("_CHECK_PEP_523", uops)
self.assertNotIn("_GUARD_CODE_VERSION__PUSH_FRAME", uops)
self.assertNotIn("_GUARD_IP__PUSH_FRAME", uops)
def test_int_type_propagate_through_range(self):
def testfunc(n):
for i in range(n):
x = i + i
return x
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertEqual(res, (TIER2_THRESHOLD - 1) * 2)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertNotIn("_GUARD_TOS_INT", uops)
self.assertNotIn("_GUARD_NOS_INT", uops)
def test_int_value_numbering(self):
def testfunc(n):
y = 1
for i in range(n):
x = y
z = x
a = z
b = a
res = x + z + a + b
return res
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertEqual(res, 4)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertIn("_GUARD_TOS_INT", uops)
self.assertNotIn("_GUARD_NOS_INT", uops)
guard_tos_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_INT"]
self.assertEqual(len(guard_tos_count), 1)
def test_comprehension(self):
def testfunc(n):
for _ in range(n):
return [i for i in range(n)]
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertEqual(res, list(range(TIER2_THRESHOLD)))
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertNotIn("_BINARY_OP_ADD_INT", uops)
def test_call_py_exact_args_disappearing(self):
def dummy(x):
return x+1
def testfunc(n):
for i in range(n):
dummy(i)
# Trigger specialization
testfunc(8)
del dummy
gc.collect()
def dummy(x):
return x + 2
testfunc(32)
ex = get_first_executor(testfunc)
# Honestly as long as it doesn't crash it's fine.
# Whether we get an executor or not is non-deterministic,
# because it's decided by when the function is freed.
# This test is a little implementation specific.
def test_promote_globals_to_constants(self):
result = script_helper.run_python_until_end('-c', textwrap.dedent("""
import _testinternalcapi
import opcode
import _opcode
def get_first_executor(func):
code = func.__code__
co_code = code.co_code
for i in range(0, len(co_code), 2):
try:
return _opcode.get_executor(code, i)
except ValueError:
pass
return None
def get_opnames(ex):
return {item[0] for item in ex}
def testfunc(n):
for i in range(n):
x = range(i)
return x
testfunc(_testinternalcapi.TIER2_THRESHOLD)
ex = get_first_executor(testfunc)
assert ex is not None
uops = get_opnames(ex)
assert "_LOAD_GLOBAL_BUILTINS" not in uops
assert "_LOAD_CONST_INLINE_BORROW" in uops
"""), PYTHON_JIT="1")
self.assertEqual(result[0].rc, 0, result)
def test_float_add_constant_propagation(self):
def testfunc(n):
a = 1.0
for _ in range(n):
a = a + 0.25
a = a + 0.25
a = a + 0.25
a = a + 0.25
return a
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertAlmostEqual(res, TIER2_THRESHOLD + 1)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_tos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_FLOAT"]
guard_nos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_FLOAT"]
self.assertLessEqual(len(guard_tos_float_count), 1)
self.assertLessEqual(len(guard_nos_float_count), 1)
# TODO gh-115506: this assertion may change after propagating constants.
# We'll also need to verify that propagation actually occurs.
self.assertIn("_POP_TOP_NOP", uops)
def test_float_subtract_constant_propagation(self):
def testfunc(n):
a = 1.0
for _ in range(n):
a = a - 0.25
a = a - 0.25
a = a - 0.25
a = a - 0.25
return a
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertAlmostEqual(res, -TIER2_THRESHOLD + 1)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_tos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_FLOAT"]
guard_nos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_FLOAT"]
self.assertLessEqual(len(guard_tos_float_count), 1)
self.assertLessEqual(len(guard_nos_float_count), 1)
# TODO gh-115506: this assertion may change after propagating constants.
# We'll also need to verify that propagation actually occurs.
self.assertIn("_POP_TOP_NOP", uops)
def test_float_multiply_constant_propagation(self):
def testfunc(n):
a = 1.0
for _ in range(n):
a = a * 1.0
a = a * 1.0
a = a * 1.0
a = a * 1.0
return a
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertAlmostEqual(res, 1.0)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_tos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_FLOAT"]
guard_nos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_FLOAT"]
self.assertLessEqual(len(guard_tos_float_count), 1)
self.assertLessEqual(len(guard_nos_float_count), 1)
# TODO gh-115506: this assertion may change after propagating constants.
# We'll also need to verify that propagation actually occurs.
self.assertIn("_POP_TOP_NOP", uops)
def test_add_unicode_propagation(self):
def testfunc(n):
a = ""
for _ in range(n):
a + a
a + a
a + a
a + a
return a
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertEqual(res, "")
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_tos_unicode_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_UNICODE"]
guard_nos_unicode_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_UNICODE"]
self.assertLessEqual(len(guard_tos_unicode_count), 1)
self.assertLessEqual(len(guard_nos_unicode_count), 1)
self.assertIn("_BINARY_OP_ADD_UNICODE", uops)
def test_compare_op_type_propagation_float(self):
def testfunc(n):
a = 1.0
for _ in range(n):
x = a == a
x = a == a
x = a == a
x = a == a
return x
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertTrue(res)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_tos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_FLOAT"]
guard_nos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_FLOAT"]
self.assertLessEqual(len(guard_tos_float_count), 1)
self.assertLessEqual(len(guard_nos_float_count), 1)
self.assertIn("_COMPARE_OP_FLOAT", uops)
def test_compare_op_type_propagation_int(self):
def testfunc(n):
a = 1
for _ in range(n):
x = a == a
x = a == a
x = a == a
x = a == a
return x
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertTrue(res)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_tos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_INT"]
guard_nos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_INT"]
self.assertLessEqual(len(guard_tos_int_count), 1)
self.assertLessEqual(len(guard_nos_int_count), 1)
self.assertIn("_COMPARE_OP_INT", uops)
def test_compare_op_type_propagation_int_partial(self):
def testfunc(n):
a = 1
for _ in range(n):
if a > 2:
x = 0
if a < 2:
x = 1
return x
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertEqual(res, 1)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_nos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_INT"]
guard_tos_int_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_INT"]
self.assertLessEqual(len(guard_nos_int_count), 1)
self.assertEqual(len(guard_tos_int_count), 0)
self.assertIn("_COMPARE_OP_INT", uops)
def test_compare_op_type_propagation_float_partial(self):
def testfunc(n):
a = 1.0
for _ in range(n):
if a > 2.0:
x = 0
if a < 2.0:
x = 1
return x
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertEqual(res, 1)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_nos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_FLOAT"]
guard_tos_float_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_FLOAT"]
self.assertLessEqual(len(guard_nos_float_count), 1)
self.assertEqual(len(guard_tos_float_count), 0)
self.assertIn("_COMPARE_OP_FLOAT", uops)
def test_compare_op_type_propagation_unicode(self):
def testfunc(n):
a = ""
for _ in range(n):
x = a == a
x = a == a
x = a == a
x = a == a
return x
res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
self.assertTrue(res)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
guard_tos_unicode_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_TOS_UNICODE"]
guard_nos_unicode_count = [opname for opname in iter_opnames(ex) if opname == "_GUARD_NOS_UNICODE"]
self.assertLessEqual(len(guard_tos_unicode_count), 1)
self.assertLessEqual(len(guard_nos_unicode_count), 1)
self.assertIn("_COMPARE_OP_STR", uops)
def test_compare_int_eq_narrows_to_constant(self):
def f(n):
def return_1():
return 1
hits = 0
v = return_1()
for _ in range(n):
if v == 1:
if v == 1:
hits += 1
return hits
res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD)
self.assertEqual(res, TIER2_THRESHOLD)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
# Constant narrowing allows constant folding for second comparison
self.assertLessEqual(count_ops(ex, "_COMPARE_OP_INT"), 1)
def test_compare_int_ne_narrows_to_constant(self):
def f(n):
def return_1():
return 1
hits = 0
v = return_1()
for _ in range(n):
if v != 1:
hits += 1000
else:
if v == 1:
hits += v + 1
return hits
res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD)
self.assertEqual(res, TIER2_THRESHOLD * 2)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
# Constant narrowing allows constant folding for second comparison
self.assertLessEqual(count_ops(ex, "_COMPARE_OP_INT"), 1)
def test_compare_float_eq_narrows_to_constant(self):
def f(n):
def return_tenth():
return 0.1
hits = 0
v = return_tenth()
for _ in range(n):
if v == 0.1:
if v == 0.1:
hits += 1
return hits
res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD)
self.assertEqual(res, TIER2_THRESHOLD)
self.assertIsNotNone(ex)
uops = get_opnames(ex)
# Constant narrowing allows constant folding for second comparison