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cpython/Tools/cases_generator/test_generator.py

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# Sorry for using pytest, these tests are mostly just for me.
# Use pytest -vv for best results.
import tempfile
import generate_cases
from parser import StackEffect
def test_effect_sizes():
input_effects = [
x := StackEffect("x", "", "", ""),
y := StackEffect("y", "", "", "oparg"),
z := StackEffect("z", "", "", "oparg*2"),
]
output_effects = [
StackEffect("a", "", "", ""),
StackEffect("b", "", "", "oparg*4"),
StackEffect("c", "", "", ""),
]
other_effects = [
StackEffect("p", "", "", "oparg<<1"),
StackEffect("q", "", "", ""),
StackEffect("r", "", "", ""),
]
assert generate_cases.effect_size(x) == (1, "")
assert generate_cases.effect_size(y) == (0, "oparg")
assert generate_cases.effect_size(z) == (0, "oparg*2")
assert generate_cases.list_effect_size(input_effects) == (1, "oparg + oparg*2")
assert generate_cases.list_effect_size(output_effects) == (2, "oparg*4")
assert generate_cases.list_effect_size(other_effects) == (2, "(oparg<<1)")
assert generate_cases.string_effect_size(generate_cases.list_effect_size(input_effects)) == "1 + oparg + oparg*2"
assert generate_cases.string_effect_size(generate_cases.list_effect_size(output_effects)) == "2 + oparg*4"
assert generate_cases.string_effect_size(generate_cases.list_effect_size(other_effects)) == "2 + (oparg<<1)"
def run_cases_test(input: str, expected: str):
temp_input = tempfile.NamedTemporaryFile("w+")
temp_input.write(generate_cases.BEGIN_MARKER)
temp_input.write(input)
temp_input.write(generate_cases.END_MARKER)
temp_input.flush()
temp_output = tempfile.NamedTemporaryFile("w+")
temp_metadata = tempfile.NamedTemporaryFile("w+")
temp_pymetadata = tempfile.NamedTemporaryFile("w+")
temp_executor = tempfile.NamedTemporaryFile("w+")
a = generate_cases.Analyzer(
[temp_input.name],
temp_output.name,
temp_metadata.name,
temp_pymetadata.name,
temp_executor.name,
)
a.parse()
a.analyze()
if a.errors:
raise RuntimeError(f"Found {a.errors} errors")
a.write_instructions()
temp_output.seek(0)
lines = temp_output.readlines()
while lines and lines[0].startswith("// "):
lines.pop(0)
actual = "".join(lines)
# if actual.rstrip() != expected.rstrip():
# print("Actual:")
# print(actual)
# print("Expected:")
# print(expected)
# print("End")
assert actual.rstrip() == expected.rstrip()
def test_inst_no_args():
input = """
inst(OP, (--)) {
spam();
}
"""
output = """
TARGET(OP) {
spam();
DISPATCH();
}
"""
run_cases_test(input, output)
def test_inst_one_pop():
input = """
inst(OP, (value --)) {
spam();
}
"""
output = """
TARGET(OP) {
PyObject *value = stack_pointer[-1];
spam();
STACK_SHRINK(1);
DISPATCH();
}
"""
run_cases_test(input, output)
def test_inst_one_push():
input = """
inst(OP, (-- res)) {
spam();
}
"""
output = """
TARGET(OP) {
PyObject *res;
spam();
STACK_GROW(1);
stack_pointer[-1] = res;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_inst_one_push_one_pop():
input = """
inst(OP, (value -- res)) {
spam();
}
"""
output = """
TARGET(OP) {
PyObject *value = stack_pointer[-1];
PyObject *res;
spam();
stack_pointer[-1] = res;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_binary_op():
input = """
inst(OP, (left, right -- res)) {
spam();
}
"""
output = """
TARGET(OP) {
PyObject *right = stack_pointer[-1];
PyObject *left = stack_pointer[-2];
PyObject *res;
spam();
STACK_SHRINK(1);
stack_pointer[-1] = res;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_overlap():
input = """
inst(OP, (left, right -- left, result)) {
spam();
}
"""
output = """
TARGET(OP) {
PyObject *right = stack_pointer[-1];
PyObject *left = stack_pointer[-2];
PyObject *result;
spam();
stack_pointer[-1] = result;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_predictions_and_eval_breaker():
input = """
inst(OP1, (--)) {
}
inst(OP3, (arg -- res)) {
DEOPT_IF(xxx, OP1);
CHECK_EVAL_BREAKER();
}
"""
output = """
TARGET(OP1) {
PREDICTED(OP1);
DISPATCH();
}
TARGET(OP3) {
PyObject *arg = stack_pointer[-1];
PyObject *res;
DEOPT_IF(xxx, OP1);
stack_pointer[-1] = res;
CHECK_EVAL_BREAKER();
DISPATCH();
}
"""
run_cases_test(input, output)
def test_error_if_plain():
input = """
inst(OP, (--)) {
ERROR_IF(cond, label);
}
"""
output = """
TARGET(OP) {
if (cond) goto label;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_error_if_plain_with_comment():
input = """
inst(OP, (--)) {
ERROR_IF(cond, label); // Comment is ok
}
"""
output = """
TARGET(OP) {
if (cond) goto label;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_error_if_pop():
input = """
inst(OP, (left, right -- res)) {
ERROR_IF(cond, label);
}
"""
output = """
TARGET(OP) {
PyObject *right = stack_pointer[-1];
PyObject *left = stack_pointer[-2];
PyObject *res;
if (cond) goto pop_2_label;
STACK_SHRINK(1);
stack_pointer[-1] = res;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_cache_effect():
input = """
inst(OP, (counter/1, extra/2, value --)) {
}
"""
output = """
TARGET(OP) {
PyObject *value = stack_pointer[-1];
uint16_t counter = read_u16(&next_instr[0].cache);
uint32_t extra = read_u32(&next_instr[1].cache);
STACK_SHRINK(1);
next_instr += 3;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_suppress_dispatch():
input = """
inst(OP, (--)) {
goto somewhere;
}
"""
output = """
TARGET(OP) {
goto somewhere;
}
"""
run_cases_test(input, output)
def test_macro_instruction():
input = """
inst(OP1, (counter/1, left, right -- left, right)) {
op1(left, right);
}
op(OP2, (extra/2, arg2, left, right -- res)) {
res = op2(arg2, left, right);
}
macro(OP) = OP1 + cache/2 + OP2;
inst(OP3, (unused/5, arg2, left, right -- res)) {
res = op3(arg2, left, right);
}
family(op, INLINE_CACHE_ENTRIES_OP) = { OP, OP3 };
"""
output = """
TARGET(OP1) {
PyObject *right = stack_pointer[-1];
PyObject *left = stack_pointer[-2];
uint16_t counter = read_u16(&next_instr[0].cache);
op1(left, right);
next_instr += 1;
DISPATCH();
}
TARGET(OP) {
PyObject *_tmp_1 = stack_pointer[-1];
PyObject *_tmp_2 = stack_pointer[-2];
PyObject *_tmp_3 = stack_pointer[-3];
{
PyObject *right = _tmp_1;
PyObject *left = _tmp_2;
uint16_t counter = read_u16(&next_instr[0].cache);
op1(left, right);
_tmp_2 = left;
_tmp_1 = right;
}
{
PyObject *right = _tmp_1;
PyObject *left = _tmp_2;
PyObject *arg2 = _tmp_3;
PyObject *res;
uint32_t extra = read_u32(&next_instr[3].cache);
res = op2(arg2, left, right);
_tmp_3 = res;
}
next_instr += 5;
static_assert(INLINE_CACHE_ENTRIES_OP == 5, "incorrect cache size");
STACK_SHRINK(2);
stack_pointer[-1] = _tmp_3;
DISPATCH();
}
TARGET(OP3) {
PyObject *right = stack_pointer[-1];
PyObject *left = stack_pointer[-2];
PyObject *arg2 = stack_pointer[-3];
PyObject *res;
res = op3(arg2, left, right);
STACK_SHRINK(2);
stack_pointer[-1] = res;
next_instr += 5;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_array_input():
input = """
inst(OP, (below, values[oparg*2], above --)) {
spam();
}
"""
output = """
TARGET(OP) {
PyObject *above = stack_pointer[-1];
PyObject **values = (stack_pointer - (1 + oparg*2));
PyObject *below = stack_pointer[-(2 + oparg*2)];
spam();
STACK_SHRINK(oparg*2);
STACK_SHRINK(2);
DISPATCH();
}
"""
run_cases_test(input, output)
def test_array_output():
input = """
inst(OP, (unused, unused -- below, values[oparg*3], above)) {
spam(values, oparg);
}
"""
output = """
TARGET(OP) {
PyObject *below;
PyObject **values = stack_pointer - (2) + 1;
PyObject *above;
spam(values, oparg);
STACK_GROW(oparg*3);
stack_pointer[-1] = above;
stack_pointer[-(2 + oparg*3)] = below;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_array_input_output():
input = """
inst(OP, (values[oparg] -- values[oparg], above)) {
spam(values, oparg);
}
"""
output = """
TARGET(OP) {
PyObject **values = (stack_pointer - oparg);
PyObject *above;
spam(values, oparg);
STACK_GROW(1);
stack_pointer[-1] = above;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_array_error_if():
input = """
inst(OP, (extra, values[oparg] --)) {
ERROR_IF(oparg == 0, somewhere);
}
"""
output = """
TARGET(OP) {
PyObject **values = (stack_pointer - oparg);
PyObject *extra = stack_pointer[-(1 + oparg)];
if (oparg == 0) { STACK_SHRINK(oparg); goto pop_1_somewhere; }
STACK_SHRINK(oparg);
STACK_SHRINK(1);
DISPATCH();
}
"""
run_cases_test(input, output)
def test_cond_effect():
input = """
inst(OP, (aa, input if ((oparg & 1) == 1), cc -- xx, output if (oparg & 2), zz)) {
output = spam(oparg, input);
}
"""
output = """
TARGET(OP) {
PyObject *cc = stack_pointer[-1];
PyObject *input = ((oparg & 1) == 1) ? stack_pointer[-(1 + (((oparg & 1) == 1) ? 1 : 0))] : NULL;
PyObject *aa = stack_pointer[-(2 + (((oparg & 1) == 1) ? 1 : 0))];
PyObject *xx;
PyObject *output = NULL;
PyObject *zz;
output = spam(oparg, input);
STACK_SHRINK((((oparg & 1) == 1) ? 1 : 0));
STACK_GROW(((oparg & 2) ? 1 : 0));
stack_pointer[-1] = zz;
if (oparg & 2) { stack_pointer[-(1 + ((oparg & 2) ? 1 : 0))] = output; }
stack_pointer[-(2 + ((oparg & 2) ? 1 : 0))] = xx;
DISPATCH();
}
"""
run_cases_test(input, output)
def test_macro_cond_effect():
input = """
op(A, (left, middle, right --)) {
# Body of A
}
op(B, (-- deep, extra if (oparg), res)) {
# Body of B
}
macro(M) = A + B;
"""
output = """
TARGET(M) {
PyObject *_tmp_1 = stack_pointer[-1];
PyObject *_tmp_2 = stack_pointer[-2];
PyObject *_tmp_3 = stack_pointer[-3];
{
PyObject *right = _tmp_1;
PyObject *middle = _tmp_2;
PyObject *left = _tmp_3;
# Body of A
}
{
PyObject *deep;
PyObject *extra = NULL;
PyObject *res;
# Body of B
_tmp_3 = deep;
if (oparg) { _tmp_2 = extra; }
_tmp_1 = res;
}
STACK_SHRINK(1);
STACK_GROW((oparg ? 1 : 0));
stack_pointer[-1] = _tmp_1;
if (oparg) { stack_pointer[-2] = _tmp_2; }
stack_pointer[-3] = _tmp_3;
DISPATCH();
}
"""
run_cases_test(input, output)
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