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Update test_peepholer.py to 3.14.5 #7864

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Merged
youknowone merged 1 commit into from
May 12, 2026
+48 −0
Merged

Update test_peepholer.py to 3.14.5 #7864

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48 changes: 48 additions & 0 deletions Lib/test/test_peepholer.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import ast
import dis
import gc
from itertools import combinations, product
Expand Down Expand Up @@ -1125,6 +1126,53 @@ def trace(frame, event, arg):

class DirectCfgOptimizerTests(CfgOptimizationTestCase):

def test_optimize_cfg_const_index_out_of_range(self):
insts = [
('LOAD_CONST', 2, 0),
('RETURN_VALUE', None, 0),
]
seq = self.seq_from_insts(insts)
with self.assertRaisesRegex(ValueError, "out of range"):
_testinternalcapi.optimize_cfg(seq, [0, 1], 0)

def test_optimize_cfg_consts_must_be_list(self):
insts = [
('LOAD_CONST', 0, 0),
('RETURN_VALUE', None, 0),
]
seq = self.seq_from_insts(insts)
with self.assertRaisesRegex(TypeError, "consts must be a list"):
_testinternalcapi.optimize_cfg(seq, (0,), 0)

def test_compiler_codegen_metadata_consts_roundtrips_optimize_cfg(self):
tree = ast.parse("x = (1, 2)", mode="exec", optimize=1)
insts, meta = _testinternalcapi.compiler_codegen(tree, "<s>", 0)
consts = meta["consts"]
self.assertIsInstance(consts, list)
_testinternalcapi.optimize_cfg(insts, consts, 0)

def test_compiler_codegen_consts_include_none_required_for_implicit_return(self):
# Module "pass" only needs the const table entry for None once
# _PyCodegen_AddReturnAtEnd runs. If metadata["consts"] were taken
# before that, the list would not match LOAD_CONST opargs (here: 0
# for None), and optimize_cfg would read out of range.
tree = ast.parse("pass", mode="exec", optimize=1)
insts, meta = _testinternalcapi.compiler_codegen(tree, "<s>", 0)
consts = meta["consts"]
self.assertEqual(consts, [None])

load_const = opcode.opmap["LOAD_CONST"]
self.assertEqual(
[t[1] for t in insts.get_instructions() if t[0] == load_const],
[0],
)

# As if consts were snapshotted before AddReturnAtEnd: still LOAD_CONST 0, no row.
with self.assertRaisesRegex(ValueError, "out of range"):
_testinternalcapi.optimize_cfg(insts, [], 0)

_testinternalcapi.optimize_cfg(insts, list(consts), 0)

def cfg_optimization_test(self, insts, expected_insts,
consts=None, expected_consts=None,
nlocals=0):
Expand Down
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