import contextlib import itertools import sys import textwrap import unittest import gc import os 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 TIER2_THRESHOLD @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 iter_opnames(ex): for item in ex: yield item[0] def get_opnames(ex): return list(iter_opnames(ex)) @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()) 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) @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 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("_GUARD_IS_TRUE_POP", 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("_GUARD_IS_FALSE_POP", 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_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_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("_GUARD_IS_FALSE_POP", uops) 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) def test_confidence_score(self): def testfunc(n): bits = 0 for i in range(n): if i & 0x01: bits += 1 if i & 0x02: bits += 1 if i&0x04: bits += 1 if i&0x08: bits += 1 if i&0x10: bits += 1 return bits x = testfunc(TIER2_THRESHOLD * 2) self.assertEqual(x, TIER2_THRESHOLD * 5) ex = get_first_executor(testfunc) self.assertIsNotNone(ex) ops = list(iter_opnames(ex)) #Since branch is 50/50 the trace could go either way. count = ops.count("_GUARD_IS_TRUE_POP") + ops.count("_GUARD_IS_FALSE_POP") self.assertLessEqual(count, 2) @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 _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) 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("_BINARY_OP_ADD_FLOAT__NO_DECREF_INPUTS", 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("_BINARY_OP_SUBTRACT_FLOAT__NO_DECREF_INPUTS", 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("_BINARY_OP_MULTIPLY_FLOAT__NO_DECREF_INPUTS", 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_type_inconsistency(self): ns = {} src = textwrap.dedent(""" def testfunc(n): for i in range(n): x = _test_global + _test_global """) exec(src, ns, ns) testfunc = ns['testfunc'] ns['_test_global'] = 0 _, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD - 1) self.assertIsNone(ex) ns['_test_global'] = 1 _, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD - 1) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_GUARD_TOS_INT", uops) self.assertNotIn("_GUARD_NOS_INT", uops) self.assertIn("_BINARY_OP_ADD_INT", uops) # Try again, but between the runs, set the global to a float. # This should result in no executor the second time. ns = {} exec(src, ns, ns) testfunc = ns['testfunc'] ns['_test_global'] = 0 _, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD - 1) self.assertIsNone(ex) ns['_test_global'] = 3.14 _, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD - 1) self.assertIsNone(ex) def test_combine_stack_space_checks_sequential(self): def dummy12(x): return x - 1 def dummy13(y): z = y + 2 return y, z def testfunc(n): a = 0 for _ in range(n): b = dummy12(7) c, d = dummy13(9) a += b + c + d return a res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD * 26) self.assertIsNotNone(ex) uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex] uop_names = [uop[0] for uop in uops_and_operands] self.assertEqual(uop_names.count("_PUSH_FRAME"), 2) self.assertEqual(uop_names.count("_RETURN_VALUE"), 2) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1) # sequential calls: max(12, 13) == 13 largest_stack = _testinternalcapi.get_co_framesize(dummy13.__code__) self.assertIn(("_CHECK_STACK_SPACE_OPERAND", largest_stack), uops_and_operands) def test_combine_stack_space_checks_nested(self): def dummy12(x): return x + 3 def dummy15(y): z = dummy12(y) return y, z def testfunc(n): a = 0 for _ in range(n): b, c = dummy15(2) a += b + c return a res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD * 7) self.assertIsNotNone(ex) uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex] uop_names = [uop[0] for uop in uops_and_operands] self.assertEqual(uop_names.count("_PUSH_FRAME"), 2) self.assertEqual(uop_names.count("_RETURN_VALUE"), 2) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1) # nested calls: 15 + 12 == 27 largest_stack = ( _testinternalcapi.get_co_framesize(dummy15.__code__) + _testinternalcapi.get_co_framesize(dummy12.__code__) ) self.assertIn(("_CHECK_STACK_SPACE_OPERAND", largest_stack), uops_and_operands) def test_combine_stack_space_checks_several_calls(self): def dummy12(x): return x + 3 def dummy13(y): z = y + 2 return y, z def dummy18(y): z = dummy12(y) x, w = dummy13(z) return z, x, w def testfunc(n): a = 0 for _ in range(n): b = dummy12(5) c, d, e = dummy18(2) a += b + c + d + e return a res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD * 25) self.assertIsNotNone(ex) uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex] uop_names = [uop[0] for uop in uops_and_operands] self.assertEqual(uop_names.count("_PUSH_FRAME"), 4) self.assertEqual(uop_names.count("_RETURN_VALUE"), 4) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1) # max(12, 18 + max(12, 13)) == 31 largest_stack = ( _testinternalcapi.get_co_framesize(dummy18.__code__) + _testinternalcapi.get_co_framesize(dummy13.__code__) ) self.assertIn(("_CHECK_STACK_SPACE_OPERAND", largest_stack), uops_and_operands) def test_combine_stack_space_checks_several_calls_different_order(self): # same as `several_calls` but with top-level calls reversed def dummy12(x): return x + 3 def dummy13(y): z = y + 2 return y, z def dummy18(y): z = dummy12(y) x, w = dummy13(z) return z, x, w def testfunc(n): a = 0 for _ in range(n): c, d, e = dummy18(2) b = dummy12(5) a += b + c + d + e return a res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD * 25) self.assertIsNotNone(ex) uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex] uop_names = [uop[0] for uop in uops_and_operands] self.assertEqual(uop_names.count("_PUSH_FRAME"), 4) self.assertEqual(uop_names.count("_RETURN_VALUE"), 4) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1) # max(18 + max(12, 13), 12) == 31 largest_stack = ( _testinternalcapi.get_co_framesize(dummy18.__code__) + _testinternalcapi.get_co_framesize(dummy13.__code__) ) self.assertIn(("_CHECK_STACK_SPACE_OPERAND", largest_stack), uops_and_operands) def test_combine_stack_space_complex(self): def dummy0(x): return x def dummy1(x): return dummy0(x) def dummy2(x): return dummy1(x) def dummy3(x): return dummy0(x) def dummy4(x): y = dummy0(x) return dummy3(y) def dummy5(x): return dummy2(x) def dummy6(x): y = dummy5(x) z = dummy0(y) return dummy4(z) def testfunc(n): a = 0 for _ in range(n): b = dummy5(1) c = dummy0(1) d = dummy6(1) a += b + c + d return a res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD * 3) self.assertIsNotNone(ex) uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex] uop_names = [uop[0] for uop in uops_and_operands] self.assertEqual(uop_names.count("_PUSH_FRAME"), 15) self.assertEqual(uop_names.count("_RETURN_VALUE"), 15) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 0) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1) largest_stack = ( _testinternalcapi.get_co_framesize(dummy6.__code__) + _testinternalcapi.get_co_framesize(dummy5.__code__) + _testinternalcapi.get_co_framesize(dummy2.__code__) + _testinternalcapi.get_co_framesize(dummy1.__code__) + _testinternalcapi.get_co_framesize(dummy0.__code__) ) self.assertIn( ("_CHECK_STACK_SPACE_OPERAND", largest_stack), uops_and_operands ) def test_combine_stack_space_checks_large_framesize(self): # Create a function with a large framesize. This ensures _CHECK_STACK_SPACE is # actually doing its job. Note that the resulting trace hits # UOP_MAX_TRACE_LENGTH, but since all _CHECK_STACK_SPACEs happen early, this # test is still meaningful. repetitions = 10000 ns = {} header = """ def dummy_large(a0): """ body = "".join([f""" a{n+1} = a{n} + 1 """ for n in range(repetitions)]) return_ = f""" return a{repetitions-1} """ exec(textwrap.dedent(header + body + return_), ns, ns) dummy_large = ns['dummy_large'] # this is something like: # # def dummy_large(a0): # a1 = a0 + 1 # a2 = a1 + 1 # .... # a9999 = a9998 + 1 # return a9999 def dummy15(z): y = dummy_large(z) return y + 3 def testfunc(n): b = 0 for _ in range(n): b += dummy15(7) return b res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD * (repetitions + 9)) self.assertIsNotNone(ex) uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex] uop_names = [uop[0] for uop in uops_and_operands] self.assertEqual(uop_names.count("_PUSH_FRAME"), 2) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1) # this hits a different case during trace projection in refcount test runs only, # so we need to account for both possibilities self.assertIn(uop_names.count("_CHECK_STACK_SPACE"), [0, 1]) if uop_names.count("_CHECK_STACK_SPACE") == 0: largest_stack = ( _testinternalcapi.get_co_framesize(dummy15.__code__) + _testinternalcapi.get_co_framesize(dummy_large.__code__) ) else: largest_stack = _testinternalcapi.get_co_framesize(dummy15.__code__) self.assertIn( ("_CHECK_STACK_SPACE_OPERAND", largest_stack), uops_and_operands ) def test_combine_stack_space_checks_recursion(self): def dummy15(x): while x > 0: return dummy15(x - 1) return 42 def testfunc(n): a = 0 for _ in range(n): a += dummy15(n) return a recursion_limit = sys.getrecursionlimit() try: sys.setrecursionlimit(TIER2_THRESHOLD + recursion_limit) res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) finally: sys.setrecursionlimit(recursion_limit) self.assertEqual(res, TIER2_THRESHOLD * 42) self.assertIsNotNone(ex) uops_and_operands = [(opcode, operand) for opcode, _, _, operand in ex] uop_names = [uop[0] for uop in uops_and_operands] self.assertEqual(uop_names.count("_PUSH_FRAME"), 2) self.assertEqual(uop_names.count("_RETURN_VALUE"), 0) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE"), 1) self.assertEqual(uop_names.count("_CHECK_STACK_SPACE_OPERAND"), 1) largest_stack = _testinternalcapi.get_co_framesize(dummy15.__code__) self.assertIn(("_CHECK_STACK_SPACE_OPERAND", largest_stack), uops_and_operands) def test_many_nested(self): # overflow the trace_stack def dummy_a(x): return x def dummy_b(x): return dummy_a(x) def dummy_c(x): return dummy_b(x) def dummy_d(x): return dummy_c(x) def dummy_e(x): return dummy_d(x) def dummy_f(x): return dummy_e(x) def dummy_g(x): return dummy_f(x) def dummy_h(x): return dummy_g(x) def testfunc(n): a = 0 for _ in range(n): a += dummy_h(n) return a res, ex = self._run_with_optimizer(testfunc, 32) self.assertEqual(res, 32 * 32) self.assertIsNone(ex) def test_return_generator(self): def gen(): yield None def testfunc(n): for i in range(n): gen() return i res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD - 1) self.assertIsNotNone(ex) self.assertIn("_RETURN_GENERATOR", get_opnames(ex)) def test_for_iter(self): def testfunc(n): t = 0 for i in set(range(n)): t += i return t res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD * (TIER2_THRESHOLD - 1) // 2) self.assertIsNotNone(ex) self.assertIn("_FOR_ITER_TIER_TWO", get_opnames(ex)) @unittest.skip("Tracing into generators currently isn't supported.") def test_for_iter_gen(self): def gen(n): for i in range(n): yield i def testfunc(n): g = gen(n) s = 0 for i in g: s += i return s res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, sum(range(TIER2_THRESHOLD))) self.assertIsNotNone(ex) self.assertIn("_FOR_ITER_GEN_FRAME", get_opnames(ex)) def test_modified_local_is_seen_by_optimized_code(self): l = sys._getframe().f_locals a = 1 s = 0 for j in range(1 << 10): a + a l["xa"[j >> 9]] = 1.0 s += a self.assertIs(type(a), float) self.assertIs(type(s), float) self.assertEqual(s, 1024.0) def test_guard_type_version_removed(self): def thing(a): x = 0 for _ in range(TIER2_THRESHOLD): x += a.attr x += a.attr return x class Foo: attr = 1 res, ex = self._run_with_optimizer(thing, Foo()) opnames = list(iter_opnames(ex)) self.assertIsNotNone(ex) self.assertEqual(res, TIER2_THRESHOLD * 2) guard_type_version_count = opnames.count("_GUARD_TYPE_VERSION") self.assertEqual(guard_type_version_count, 1) def test_guard_type_version_removed_inlined(self): """ Verify that the guard type version if we have an inlined function """ def fn(): pass def thing(a): x = 0 for _ in range(TIER2_THRESHOLD): x += a.attr fn() x += a.attr return x class Foo: attr = 1 res, ex = self._run_with_optimizer(thing, Foo()) opnames = list(iter_opnames(ex)) self.assertIsNotNone(ex) self.assertEqual(res, TIER2_THRESHOLD * 2) guard_type_version_count = opnames.count("_GUARD_TYPE_VERSION") self.assertEqual(guard_type_version_count, 1) def test_guard_type_version_removed_invalidation(self): def thing(a): x = 0 for i in range(TIER2_THRESHOLD * 2 + 1): x += a.attr # The first TIER2_THRESHOLD iterations we set the attribute on # this dummy class, which shouldn't trigger the type watcher. # Note that the code needs to be in this weird form so it's # optimized inline without any control flow: setattr((Bar, Foo)[i == TIER2_THRESHOLD + 1], "attr", 2) x += a.attr return x class Foo: attr = 1 class Bar: pass res, ex = self._run_with_optimizer(thing, Foo()) opnames = list(iter_opnames(ex)) self.assertIsNotNone(ex) self.assertEqual(res, TIER2_THRESHOLD * 6 + 1) call = opnames.index("_CALL_BUILTIN_FAST") load_attr_top = opnames.index("_POP_TOP_LOAD_CONST_INLINE_BORROW", 0, call) load_attr_bottom = opnames.index("_POP_TOP_LOAD_CONST_INLINE_BORROW", call) self.assertEqual(opnames[:load_attr_top].count("_GUARD_TYPE_VERSION"), 1) self.assertEqual(opnames[call:load_attr_bottom].count("_CHECK_VALIDITY"), 2) def test_guard_type_version_removed_escaping(self): def thing(a): x = 0 for i in range(TIER2_THRESHOLD): x += a.attr # eval should be escaping eval("None") x += a.attr return x class Foo: attr = 1 res, ex = self._run_with_optimizer(thing, Foo()) opnames = list(iter_opnames(ex)) self.assertIsNotNone(ex) self.assertEqual(res, TIER2_THRESHOLD * 2) call = opnames.index("_CALL_BUILTIN_FAST_WITH_KEYWORDS") load_attr_top = opnames.index("_POP_TOP_LOAD_CONST_INLINE_BORROW", 0, call) load_attr_bottom = opnames.index("_POP_TOP_LOAD_CONST_INLINE_BORROW", call) self.assertEqual(opnames[:load_attr_top].count("_GUARD_TYPE_VERSION"), 1) self.assertEqual(opnames[call:load_attr_bottom].count("_CHECK_VALIDITY"), 2) def test_guard_type_version_executor_invalidated(self): """ Verify that the executor is invalided on a type change. """ def thing(a): x = 0 for i in range(TIER2_THRESHOLD): x += a.attr x += a.attr return x class Foo: attr = 1 res, ex = self._run_with_optimizer(thing, Foo()) self.assertEqual(res, TIER2_THRESHOLD * 2) self.assertIsNotNone(ex) self.assertEqual(list(iter_opnames(ex)).count("_GUARD_TYPE_VERSION"), 1) self.assertTrue(ex.is_valid()) Foo.attr = 0 self.assertFalse(ex.is_valid()) def test_type_version_doesnt_segfault(self): """ Tests that setting a type version doesn't cause a segfault when later looking at the stack. """ # Minimized from mdp.py benchmark class A: def __init__(self): self.attr = {} def method(self, arg): self.attr[arg] = None def fn(a): for _ in range(100): (_ for _ in []) (_ for _ in [a.method(None)]) fn(A()) def test_func_guards_removed_or_reduced(self): def testfunc(n): for i in range(n): # Only works on functions promoted to constants global_identity(i) testfunc(TIER2_THRESHOLD) ex = get_first_executor(testfunc) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_PUSH_FRAME", uops) # Strength reduced version self.assertIn("_CHECK_FUNCTION_VERSION_INLINE", uops) self.assertNotIn("_CHECK_FUNCTION_VERSION", uops) # Removed guard self.assertNotIn("_CHECK_FUNCTION_EXACT_ARGS", uops) def test_method_guards_removed_or_reduced(self): def testfunc(n): result = 0 for i in range(n): result += test_bound_method(i) return result res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, sum(range(TIER2_THRESHOLD))) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_PUSH_FRAME", uops) # Strength reduced version self.assertIn("_CHECK_FUNCTION_VERSION_INLINE", uops) self.assertNotIn("_CHECK_METHOD_VERSION", uops) def test_jit_error_pops(self): """ Tests that the correct number of pops are inserted into the exit stub """ items = 17 * [None] + [[]] with self.assertRaises(TypeError): {item for item in items} def test_power_type_depends_on_input_values(self): template = textwrap.dedent(""" import _testinternalcapi L, R, X, Y = {l}, {r}, {x}, {y} def check(actual: complex, expected: complex) -> None: assert actual == expected, (actual, expected) assert type(actual) is type(expected), (actual, expected) def f(l: complex, r: complex) -> None: expected_local_local = pow(l, r) + pow(l, r) expected_const_local = pow(L, r) + pow(L, r) expected_local_const = pow(l, R) + pow(l, R) expected_const_const = pow(L, R) + pow(L, R) for _ in range(_testinternalcapi.TIER2_THRESHOLD): # Narrow types: l + l, r + r # The powers produce results, and the addition is unguarded: check(l ** r + l ** r, expected_local_local) check(L ** r + L ** r, expected_const_local) check(l ** R + l ** R, expected_local_const) check(L ** R + L ** R, expected_const_const) # JIT for one pair of values... f(L, R) # ...then run with another: f(X, Y) """) interesting = [ (1, 1), # int ** int -> int (1, -1), # int ** int -> float (1.0, 1), # float ** int -> float (1, 1.0), # int ** float -> float (-1, 0.5), # int ** float -> complex (1.0, 1.0), # float ** float -> float (-1.0, 0.5), # float ** float -> complex ] for (l, r), (x, y) in itertools.product(interesting, repeat=2): s = template.format(l=l, r=r, x=x, y=y) with self.subTest(l=l, r=r, x=x, y=y): script_helper.assert_python_ok("-c", s) def test_symbols_flow_through_tuples(self): def testfunc(n): for _ in range(n): a = 1 b = 2 t = a, b x, y = t r = x + y return r res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, 3) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_BINARY_OP_ADD_INT", uops) self.assertNotIn("_GUARD_NOS_INT", uops) self.assertNotIn("_GUARD_TOS_INT", uops) def test_decref_escapes(self): class Convert9999ToNone: def __del__(self): ns = sys._getframe(1).f_locals if ns["i"] == _testinternalcapi.TIER2_THRESHOLD: ns["i"] = None def crash_addition(): try: for i in range(_testinternalcapi.TIER2_THRESHOLD + 1): n = Convert9999ToNone() i + i # Remove guards for i. n = None # Change i. i + i # This crashed when we didn't treat DECREF as escaping (gh-124483) except TypeError: pass crash_addition() def test_narrow_type_to_constant_bool_false(self): def f(n): trace = [] for i in range(n): # false is always False, but we can only prove that it's a bool: false = i == TIER2_THRESHOLD trace.append("A") if not false: # Kept. trace.append("B") if not false: # Removed! trace.append("C") trace.append("D") if false: # Removed! trace.append("X") trace.append("E") trace.append("F") if false: # Removed! trace.append("X") trace.append("G") return trace trace, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(trace, list("ABCDEFG") * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) # Only one guard remains: self.assertEqual(uops.count("_GUARD_IS_FALSE_POP"), 1) self.assertEqual(uops.count("_GUARD_IS_TRUE_POP"), 0) # But all of the appends we care about are still there: self.assertEqual(uops.count("_CALL_LIST_APPEND"), len("ABCDEFG")) def test_narrow_type_to_constant_bool_true(self): def f(n): trace = [] for i in range(n): # true always True, but we can only prove that it's a bool: true = i != TIER2_THRESHOLD trace.append("A") if true: # Kept. trace.append("B") if not true: # Removed! trace.append("X") trace.append("C") if true: # Removed! trace.append("D") trace.append("E") trace.append("F") if not true: # Removed! trace.append("X") trace.append("G") return trace trace, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(trace, list("ABCDEFG") * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) # Only one guard remains: self.assertEqual(uops.count("_GUARD_IS_FALSE_POP"), 0) self.assertEqual(uops.count("_GUARD_IS_TRUE_POP"), 1) # But all of the appends we care about are still there: self.assertEqual(uops.count("_CALL_LIST_APPEND"), len("ABCDEFG")) def test_narrow_type_to_constant_int_zero(self): def f(n): trace = [] for i in range(n): # zero is always (int) 0, but we can only prove that it's a integer: false = i == TIER2_THRESHOLD # this will always be false, while hopefully still fooling optimizer improvements zero = false + 0 # this should always set the variable zero equal to 0 trace.append("A") if not zero: # Kept. trace.append("B") if not zero: # Removed! trace.append("C") trace.append("D") if zero: # Removed! trace.append("X") trace.append("E") trace.append("F") if zero: # Removed! trace.append("X") trace.append("G") return trace trace, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(trace, list("ABCDEFG") * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) # Only one guard remains: self.assertEqual(uops.count("_GUARD_IS_FALSE_POP"), 1) self.assertEqual(uops.count("_GUARD_IS_TRUE_POP"), 0) # But all of the appends we care about are still there: self.assertEqual(uops.count("_CALL_LIST_APPEND"), len("ABCDEFG")) def test_narrow_type_to_constant_str_empty(self): def f(n): trace = [] for i in range(n): # Hopefully the optimizer can't guess what the value is. # empty is always "", but we can only prove that it's a string: false = i == TIER2_THRESHOLD empty = "X"[:false] trace.append("A") if not empty: # Kept. trace.append("B") if not empty: # Removed! trace.append("C") trace.append("D") if empty: # Removed! trace.append("X") trace.append("E") trace.append("F") if empty: # Removed! trace.append("X") trace.append("G") return trace trace, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(trace, list("ABCDEFG") * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) # Only one guard remains: self.assertEqual(uops.count("_GUARD_IS_FALSE_POP"), 1) self.assertEqual(uops.count("_GUARD_IS_TRUE_POP"), 0) # But all of the appends we care about are still there: self.assertEqual(uops.count("_CALL_LIST_APPEND"), len("ABCDEFG")) def test_compare_pop_two_load_const_inline_borrow(self): def testfunc(n): x = 0 for _ in range(n): a = 10 b = 10 if a == b: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_COMPARE_OP_INT", uops) self.assertNotIn("_POP_TWO_LOAD_CONST_INLINE_BORROW", uops) def test_to_bool_bool_contains_op_set(self): """ Test that _TO_BOOL_BOOL is removed from code like: res = foo in some_set if res: .... """ def testfunc(n): x = 0 s = {1, 2, 3} for _ in range(n): a = 2 in_set = a in s if in_set: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CONTAINS_OP_SET", uops) self.assertNotIn("_TO_BOOL_BOOL", uops) def test_to_bool_bool_contains_op_dict(self): """ Test that _TO_BOOL_BOOL is removed from code like: res = foo in some_dict if res: .... """ def testfunc(n): x = 0 s = {1: 1, 2: 2, 3: 3} for _ in range(n): a = 2 in_dict = a in s if in_dict: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CONTAINS_OP_DICT", uops) self.assertNotIn("_TO_BOOL_BOOL", uops) def test_remove_guard_for_known_type_str(self): def f(n): for i in range(n): false = i == TIER2_THRESHOLD empty = "X"[:false] if empty: return 1 return 0 res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(res, 0) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_TO_BOOL_STR", uops) self.assertNotIn("_GUARD_TOS_UNICODE", uops) def test_remove_guard_for_known_type_dict(self): def f(n): x = 0 for _ in range(n): d = {} d["Spam"] = 1 # unguarded! x += d["Spam"] # ...unguarded! return x res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertEqual(uops.count("_GUARD_NOS_DICT"), 0) self.assertEqual(uops.count("_STORE_SUBSCR_DICT"), 1) self.assertEqual(uops.count("_BINARY_OP_SUBSCR_DICT"), 1) def test_remove_guard_for_known_type_list(self): def f(n): x = 0 for _ in range(n): l = [0] l[0] = 1 # unguarded! [a] = l # ...unguarded! b = l[0] # ...unguarded! if l: # ...unguarded! x += a + b return x res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(res, 2 * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertEqual(uops.count("_GUARD_NOS_LIST"), 0) self.assertEqual(uops.count("_STORE_SUBSCR_LIST_INT"), 1) self.assertEqual(uops.count("_GUARD_TOS_LIST"), 0) self.assertEqual(uops.count("_UNPACK_SEQUENCE_LIST"), 1) self.assertEqual(uops.count("_BINARY_OP_SUBSCR_LIST_INT"), 1) self.assertEqual(uops.count("_TO_BOOL_LIST"), 1) def test_remove_guard_for_known_type_set(self): def f(n): x = 0 for _ in range(n): x += "Spam" in {"Spam"} # Unguarded! return x res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_GUARD_TOS_ANY_SET", uops) self.assertIn("_CONTAINS_OP_SET", uops) def test_remove_guard_for_known_type_tuple(self): def f(n): x = 0 for _ in range(n): t = (1, 2, (3, (4,))) t_0, t_1, (t_2_0, t_2_1) = t # Unguarded! t_2_1_0 = t_2_1[0] # Unguarded! x += t_0 + t_1 + t_2_0 + t_2_1_0 return x res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(res, 10 * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_GUARD_TOS_TUPLE", uops) self.assertIn("_UNPACK_SEQUENCE_TUPLE", uops) self.assertIn("_UNPACK_SEQUENCE_TWO_TUPLE", uops) self.assertNotIn("_GUARD_NOS_TUPLE", uops) self.assertIn("_BINARY_OP_SUBSCR_TUPLE_INT", uops) def test_binary_subcsr_str_int_narrows_to_str(self): def testfunc(n): x = [] s = "foo" for _ in range(n): y = s[0] # _BINARY_OP_SUBSCR_STR_INT z = "bar" + y # (_GUARD_TOS_UNICODE) + _BINARY_OP_ADD_UNICODE x.append(z) return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, ["barf"] * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_BINARY_OP_SUBSCR_STR_INT", uops) # _BINARY_OP_SUBSCR_STR_INT narrows the result to 'str' so # the unicode guard before _BINARY_OP_ADD_UNICODE is removed. self.assertNotIn("_GUARD_TOS_UNICODE", uops) self.assertIn("_BINARY_OP_ADD_UNICODE", uops) def test_call_type_1_guards_removed(self): def testfunc(n): x = 0 for _ in range(n): foo = eval('42') x += type(foo) is int return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_TYPE_1", uops) self.assertNotIn("_GUARD_NOS_NULL", uops) self.assertNotIn("_GUARD_CALLABLE_TYPE_1", uops) def test_call_type_1_known_type(self): def testfunc(n): x = 0 for _ in range(n): x += type(42) is int return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) # When the result of type(...) is known, _CALL_TYPE_1 is replaced with # _POP_CALL_ONE_LOAD_CONST_INLINE_BORROW which is optimized away in # remove_unneeded_uops. self.assertNotIn("_CALL_TYPE_1", uops) self.assertNotIn("_POP_CALL_ONE_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_TOP_LOAD_CONST_INLINE_BORROW", uops) def test_call_type_1_result_is_const(self): def testfunc(n): x = 0 for _ in range(n): t = type(42) if t is not None: # guard is removed x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_GUARD_IS_NOT_NONE_POP", uops) def test_call_str_1(self): def testfunc(n): x = 0 for _ in range(n): y = str(42) if y == '42': x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_STR_1", uops) self.assertNotIn("_GUARD_NOS_NULL", uops) self.assertNotIn("_GUARD_CALLABLE_STR_1", uops) def test_call_str_1_result_is_str(self): def testfunc(n): x = 0 for _ in range(n): y = str(42) + 'foo' if y == '42foo': x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_STR_1", uops) self.assertIn("_BINARY_OP_ADD_UNICODE", uops) self.assertNotIn("_GUARD_NOS_UNICODE", uops) self.assertNotIn("_GUARD_TOS_UNICODE", uops) def test_call_str_1_result_is_const_for_str_input(self): # Test a special case where the argument of str(arg) # is known to be a string. The information about the # argument being a string should be propagated to the # result of str(arg). def testfunc(n): x = 0 for _ in range(n): y = str('foo') # string argument if y: # _TO_BOOL_STR + _GUARD_IS_TRUE_POP are removed x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_STR_1", uops) self.assertNotIn("_TO_BOOL_STR", uops) self.assertNotIn("_GUARD_IS_TRUE_POP", uops) def test_call_tuple_1(self): def testfunc(n): x = 0 for _ in range(n): y = tuple([1, 2]) # _CALL_TUPLE_1 if y == (1, 2): x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_TUPLE_1", uops) self.assertNotIn("_GUARD_NOS_NULL", uops) self.assertNotIn("_GUARD_CALLABLE_TUPLE_1", uops) def test_call_tuple_1_result_is_tuple(self): def testfunc(n): x = 0 for _ in range(n): y = tuple([1, 2]) # _CALL_TUPLE_1 if y[0] == 1: # _BINARY_OP_SUBSCR_TUPLE_INT x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_TUPLE_1", uops) self.assertIn("_BINARY_OP_SUBSCR_TUPLE_INT", uops) self.assertNotIn("_GUARD_NOS_TUPLE", uops) def test_call_tuple_1_result_propagates_for_tuple_input(self): # Test a special case where the argument of tuple(arg) # is known to be a tuple. The information about the # argument being a tuple should be propagated to the # result of tuple(arg). def testfunc(n): x = 0 for _ in range(n): y = tuple((1, 2)) # tuple argument a, _ = y # _UNPACK_SEQUENCE_TWO_TUPLE if a == 1: # _COMPARE_OP_INT + _GUARD_IS_TRUE_POP are removed x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_TUPLE_1", uops) self.assertIn("_UNPACK_SEQUENCE_TWO_TUPLE", uops) self.assertNotIn("_COMPARE_OP_INT", uops) self.assertNotIn("_GUARD_IS_TRUE_POP", uops) def test_call_len(self): def testfunc(n): a = [1, 2, 3, 4] for _ in range(n): _ = len(a) - 1 _, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) uops = get_opnames(ex) self.assertNotIn("_GUARD_NOS_NULL", uops) self.assertNotIn("_GUARD_CALLABLE_LEN", uops) self.assertIn("_CALL_LEN", uops) self.assertNotIn("_GUARD_NOS_INT", uops) self.assertNotIn("_GUARD_TOS_INT", uops) def test_call_len_known_length_small_int(self): def testfunc(n): x = 0 for _ in range(n): t = (1, 2, 3, 4, 5) if len(t) == 5: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) # When the length is < _PY_NSMALLPOSINTS, the len() call is replaced # with just an inline load. self.assertNotIn("_CALL_LEN", uops) self.assertNotIn("_POP_CALL_ONE_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_TOP_LOAD_CONST_INLINE_BORROW", uops) def test_call_len_known_length(self): def testfunc(n): class C: t = tuple(range(300)) x = 0 for _ in range(n): if len(C.t) == 300: # comparison + guard removed x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) # When the length is >= _PY_NSMALLPOSINTS, we cannot replace # the len() call with an inline load, but knowing the exact # length allows us to optimize more code, such as conditionals # in this case self.assertIn("_CALL_LEN", uops) self.assertNotIn("_COMPARE_OP_INT", uops) self.assertNotIn("_GUARD_IS_TRUE_POP", uops) def test_get_len_with_const_tuple(self): def testfunc(n): x = 0.0 for _ in range(n): match (1, 2, 3, 4): case [_, _, _, _]: x += 1.0 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(int(res), TIER2_THRESHOLD) uops = get_opnames(ex) self.assertNotIn("_GUARD_NOS_INT", uops) self.assertNotIn("_GET_LEN", uops) self.assertIn("_LOAD_CONST_INLINE_BORROW", uops) def test_get_len_with_non_const_tuple(self): def testfunc(n): x = 0.0 for _ in range(n): match object(), object(): case [_, _]: x += 1.0 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(int(res), TIER2_THRESHOLD) uops = get_opnames(ex) self.assertNotIn("_GUARD_NOS_INT", uops) self.assertNotIn("_GET_LEN", uops) self.assertIn("_LOAD_CONST_INLINE_BORROW", uops) def test_get_len_with_non_tuple(self): def testfunc(n): x = 0.0 for _ in range(n): match [1, 2, 3, 4]: case [_, _, _, _]: x += 1.0 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(int(res), TIER2_THRESHOLD) uops = get_opnames(ex) self.assertNotIn("_GUARD_NOS_INT", uops) self.assertIn("_GET_LEN", uops) def test_binary_op_subscr_tuple_int(self): def testfunc(n): x = 0 for _ in range(n): y = (1, 2) if y[0] == 1: # _COMPARE_OP_INT + _GUARD_IS_TRUE_POP are removed x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_BINARY_OP_SUBSCR_TUPLE_INT", uops) self.assertNotIn("_COMPARE_OP_INT", uops) self.assertNotIn("_GUARD_IS_TRUE_POP", uops) def test_call_isinstance_guards_removed(self): def testfunc(n): x = 0 for _ in range(n): y = isinstance(42, int) if y: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_CALL_ISINSTANCE", uops) self.assertNotIn("_GUARD_THIRD_NULL", uops) self.assertNotIn("_GUARD_CALLABLE_ISINSTANCE", uops) self.assertNotIn("_POP_TOP_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_ONE_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_TWO_LOAD_CONST_INLINE_BORROW", uops) def test_call_list_append(self): def testfunc(n): a = [] for i in range(n): a.append(i) return sum(a) res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, sum(range(TIER2_THRESHOLD))) uops = get_opnames(ex) self.assertIn("_CALL_LIST_APPEND", uops) # We should remove these in the future self.assertIn("_GUARD_NOS_LIST", uops) self.assertIn("_GUARD_CALLABLE_LIST_APPEND", uops) def test_call_isinstance_is_true(self): def testfunc(n): x = 0 for _ in range(n): y = isinstance(42, int) if y: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_CALL_ISINSTANCE", uops) self.assertNotIn("_TO_BOOL_BOOL", uops) self.assertNotIn("_GUARD_IS_TRUE_POP", uops) self.assertNotIn("_POP_TOP_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_ONE_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_TWO_LOAD_CONST_INLINE_BORROW", uops) def test_call_isinstance_is_false(self): def testfunc(n): x = 0 for _ in range(n): y = isinstance(42, str) if not y: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_CALL_ISINSTANCE", uops) self.assertNotIn("_TO_BOOL_BOOL", uops) self.assertNotIn("_GUARD_IS_FALSE_POP", uops) self.assertNotIn("_POP_TOP_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_ONE_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_TWO_LOAD_CONST_INLINE_BORROW", uops) def test_call_isinstance_subclass(self): def testfunc(n): x = 0 for _ in range(n): y = isinstance(True, int) if y: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_CALL_ISINSTANCE", uops) self.assertNotIn("_TO_BOOL_BOOL", uops) self.assertNotIn("_GUARD_IS_TRUE_POP", uops) self.assertNotIn("_POP_TOP_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_ONE_LOAD_CONST_INLINE_BORROW", uops) self.assertNotIn("_POP_CALL_TWO_LOAD_CONST_INLINE_BORROW", uops) def test_call_isinstance_unknown_object(self): def testfunc(n): x = 0 for _ in range(n): # The optimizer doesn't know the return type here: bar = eval("42") # This will only narrow to bool: y = isinstance(bar, int) if y: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_ISINSTANCE", uops) self.assertNotIn("_TO_BOOL_BOOL", uops) self.assertIn("_GUARD_IS_TRUE_POP", uops) def test_call_isinstance_tuple_of_classes(self): def testfunc(n): x = 0 for _ in range(n): # A tuple of classes is currently not optimized, # so this is only narrowed to bool: y = isinstance(42, (int, str)) if y: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_ISINSTANCE", uops) self.assertNotIn("_TO_BOOL_BOOL", uops) self.assertIn("_GUARD_IS_TRUE_POP", uops) def test_call_isinstance_metaclass(self): class EvenNumberMeta(type): def __instancecheck__(self, number): return number % 2 == 0 class EvenNumber(metaclass=EvenNumberMeta): pass def testfunc(n): x = 0 for _ in range(n): # Only narrowed to bool y = isinstance(42, EvenNumber) if y: x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_CALL_ISINSTANCE", uops) self.assertNotIn("_TO_BOOL_BOOL", uops) self.assertIn("_GUARD_IS_TRUE_POP", uops) def test_set_type_version_sets_type(self): class C: A = 1 def testfunc(n): x = 0 c = C() for _ in range(n): x += c.A # Guarded. x += type(c).A # Unguarded! return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, 2 * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_GUARD_TYPE_VERSION", uops) self.assertNotIn("_CHECK_ATTR_CLASS", uops) def test_load_small_int(self): def testfunc(n): x = 0 for i in range(n): x += 1 return x res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD) self.assertEqual(res, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_LOAD_SMALL_INT", uops) self.assertIn("_LOAD_CONST_INLINE_BORROW", uops) def test_cached_attributes(self): class C: A = 1 def m(self): return 1 class D: __slots__ = () A = 1 def m(self): return 1 class E(Exception): def m(self): return 1 def f(n): x = 0 c = C() d = D() e = E() for _ in range(n): x += C.A # _LOAD_ATTR_CLASS x += c.A # _LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES x += d.A # _LOAD_ATTR_NONDESCRIPTOR_NO_DICT x += c.m() # _LOAD_ATTR_METHOD_WITH_VALUES x += d.m() # _LOAD_ATTR_METHOD_NO_DICT x += e.m() # _LOAD_ATTR_METHOD_LAZY_DICT return x res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(res, 6 * TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_LOAD_ATTR_CLASS", uops) self.assertNotIn("_LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES", uops) self.assertNotIn("_LOAD_ATTR_NONDESCRIPTOR_NO_DICT", uops) self.assertNotIn("_LOAD_ATTR_METHOD_WITH_VALUES", uops) self.assertNotIn("_LOAD_ATTR_METHOD_NO_DICT", uops) self.assertNotIn("_LOAD_ATTR_METHOD_LAZY_DICT", uops) def test_float_op_refcount_elimination(self): def testfunc(args): a, b, n = args c = 0.0 for _ in range(n): c += a + b return c res, ex = self._run_with_optimizer(testfunc, (0.1, 0.1, TIER2_THRESHOLD)) self.assertAlmostEqual(res, TIER2_THRESHOLD * (0.1 + 0.1)) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_BINARY_OP_ADD_FLOAT__NO_DECREF_INPUTS", uops) def test_remove_guard_for_slice_list(self): def f(n): for i in range(n): false = i == TIER2_THRESHOLD sliced = [1, 2, 3][:false] if sliced: return 1 return 0 res, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertEqual(res, 0) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_TO_BOOL_LIST", uops) self.assertNotIn("_GUARD_TOS_LIST", uops) def test_remove_guard_for_slice_tuple(self): def f(n): for i in range(n): false = i == TIER2_THRESHOLD a, b = (1, 2, 3)[: false + 2] _, ex = self._run_with_optimizer(f, TIER2_THRESHOLD) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_UNPACK_SEQUENCE_TWO_TUPLE", uops) self.assertNotIn("_GUARD_TOS_TUPLE", uops) def test_unary_invert_long_type(self): def testfunc(n): for _ in range(n): a = 9397 x = ~a + ~a testfunc(TIER2_THRESHOLD) ex = get_first_executor(testfunc) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_GUARD_TOS_INT", uops) self.assertNotIn("_GUARD_NOS_INT", uops) def test_attr_promotion_failure(self): # We're not testing for any specific uops here, just # testing it doesn't crash. script_helper.assert_python_ok('-c', textwrap.dedent(""" import _testinternalcapi import _opcode import email 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 testfunc(n): for _ in range(n): email.jit_testing = None prompt = email.jit_testing del email.jit_testing testfunc(_testinternalcapi.TIER2_THRESHOLD) ex = get_first_executor(testfunc) assert ex is not None """)) def test_pop_top_specialize_none(self): def testfunc(n): for _ in range(n): global_identity(None) testfunc(TIER2_THRESHOLD) ex = get_first_executor(testfunc) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_POP_TOP_NOP", uops) def test_pop_top_specialize_int(self): def testfunc(n): for _ in range(n): global_identity(100000) testfunc(TIER2_THRESHOLD) ex = get_first_executor(testfunc) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_POP_TOP_INT", uops) def test_pop_top_specialize_float(self): def testfunc(n): for _ in range(n): global_identity(1e6) testfunc(TIER2_THRESHOLD) ex = get_first_executor(testfunc) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertIn("_POP_TOP_FLOAT", uops) def test_unary_negative_long_float_type(self): def testfunc(n): for _ in range(n): a = 9397 f = 9397.0 x = -a + -a y = -f + -f testfunc(TIER2_THRESHOLD) ex = get_first_executor(testfunc) self.assertIsNotNone(ex) uops = get_opnames(ex) self.assertNotIn("_GUARD_TOS_INT", uops) self.assertNotIn("_GUARD_NOS_INT", uops) self.assertNotIn("_GUARD_TOS_FLOAT", uops) self.assertNotIn("_GUARD_NOS_FLOAT", uops) def test_binary_op_constant_evaluate(self): def testfunc(n): for _ in range(n): 2 ** 65 testfunc(TIER2_THRESHOLD) ex = get_first_executor(testfunc) self.assertIsNotNone(ex) uops = get_opnames(ex) # For now... until we constant propagate it away. self.assertIn("_BINARY_OP", uops) def global_identity(x): return x class TestObject: def test(self, *args, **kwargs): return args[0] test_object = TestObject() test_bound_method = TestObject.test.__get__(test_object) if __name__ == "__main__": unittest.main()