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"""Test runner for data-flow analysis test cases."""
from __future__ import annotations
import os.path
from mypy.errors import CompileError
from mypy.test.config import test_temp_dir
from mypy.test.data import DataDrivenTestCase
from mypyc.analysis import dataflow
from mypyc.common import TOP_LEVEL_NAME
from mypyc.ir.func_ir import all_values
from mypyc.ir.ops import Value
from mypyc.ir.pprint import format_func, generate_names_for_ir
from mypyc.test.testutil import (
ICODE_GEN_BUILTINS,
MypycDataSuite,
assert_test_output,
build_ir_for_single_file,
use_custom_builtins,
)
from mypyc.transform import exceptions
files = ["analysis.test"]
class TestAnalysis(MypycDataSuite):
files = files
base_path = test_temp_dir
optional_out = True
def run_case(self, testcase: DataDrivenTestCase) -> None:
"""Perform a data-flow analysis test case."""
with use_custom_builtins(os.path.join(self.data_prefix, ICODE_GEN_BUILTINS), testcase):
try:
ir = build_ir_for_single_file(testcase.input)
except CompileError as e:
actual = e.messages
else:
actual = []
for fn in ir:
if fn.name == TOP_LEVEL_NAME and not testcase.name.endswith("_toplevel"):
continue
exceptions.insert_exception_handling(fn)
actual.extend(format_func(fn))
cfg = dataflow.get_cfg(fn.blocks)
args: set[Value] = set(fn.arg_regs)
name = testcase.name
if name.endswith("_MaybeDefined"):
# Forward, maybe
analysis_result = dataflow.analyze_maybe_defined_regs(fn.blocks, cfg, args)
elif name.endswith("_Liveness"):
# Backward, maybe
analysis_result = dataflow.analyze_live_regs(fn.blocks, cfg)
elif name.endswith("_MustDefined"):
# Forward, must
analysis_result = dataflow.analyze_must_defined_regs(
fn.blocks, cfg, args, regs=all_values(fn.arg_regs, fn.blocks)
)
elif name.endswith("_BorrowedArgument"):
# Forward, must
analysis_result = dataflow.analyze_borrowed_arguments(fn.blocks, cfg, args)
else:
assert False, "No recognized _AnalysisName suffix in test case"
names = generate_names_for_ir(fn.arg_regs, fn.blocks)
for key in sorted(
analysis_result.before.keys(), key=lambda x: (x[0].label, x[1])
):
pre = ", ".join(sorted(names[reg] for reg in analysis_result.before[key]))
post = ", ".join(sorted(names[reg] for reg in analysis_result.after[key]))
actual.append(
"%-8s %-23s %s" % ((key[0].label, key[1]), "{%s}" % pre, "{%s}" % post)
)
assert_test_output(testcase, actual, "Invalid source code output")
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