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GH-131498: Cases generator: Parse down to C statement level. #131948

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Merged
merged 14 commits into from
Apr 2, 2025
Merged

GH-131498: Cases generator: Parse down to C statement level. #131948

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7d1c536
Parse down to statement level in the cases generator
markshannon Mar 28, 2025
f7cccf8
Add handling for #if macros. Work in progress
markshannon Mar 30, 2025
0bf3686
Handle variable definition through out parameters
markshannon Mar 31, 2025
a7d137a
Fixup declarations and test output
markshannon Mar 31, 2025
94562d2
Fixup rebase
markshannon Mar 31, 2025
94dc498
error is nonlocal
markshannon Mar 31, 2025
e8d902e
Remove extra braces in executor_cases.c.h
markshannon Mar 31, 2025
3d3cc0e
Fix type annotations
markshannon Mar 31, 2025
f787fe0
Fix type annotations
markshannon Mar 31, 2025
a5e731b
Address review comments
markshannon Apr 1, 2025
907d768
Whitespace
markshannon Apr 1, 2025
cd59649
Workaround MyPy's awful flow analysis.
markshannon Apr 1, 2025
63e705e
Fix typo
markshannon Apr 1, 2025
0cba46d
Merge branch 'main' into code-gen-add-parser
markshannon Apr 2, 2025
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9 changes: 0 additions & 9 deletions Lib/test/test_generated_cases.py
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Original file line number Diff line number Diff line change
Expand Up @@ -457,7 +457,6 @@ def test_error_if_plain_with_comment(self):
if (cond) {
JUMP_TO_LABEL(label);
}
// Comment is ok
DISPATCH();
}
"""
Expand Down Expand Up @@ -586,7 +585,6 @@ def test_suppress_dispatch(self):

LABEL(somewhere)
{

}
"""
self.run_cases_test(input, output)
Expand Down Expand Up @@ -1351,7 +1349,6 @@ def test_pop_on_error_peeks(self):
}
// THIRD
{
// Mark j and k as used
if (cond) {
JUMP_TO_LABEL(pop_2_error);
}
Expand Down Expand Up @@ -1757,17 +1754,14 @@ def test_complex_label(self):
output = """
LABEL(other_label)
{

}

LABEL(other_label2)
{

}

LABEL(my_label)
{
// Comment
_PyFrame_SetStackPointer(frame, stack_pointer);
do_thing();
stack_pointer = _PyFrame_GetStackPointer(frame);
Expand Down Expand Up @@ -1795,7 +1789,6 @@ def test_spilled_label(self):
output = """
LABEL(one)
{
/* STACK SPILLED */
stack_pointer = _PyFrame_GetStackPointer(frame);
JUMP_TO_LABEL(two);
}
Expand Down Expand Up @@ -1851,7 +1844,6 @@ def test_multiple_labels(self):
output = """
LABEL(my_label_1)
{
// Comment
_PyFrame_SetStackPointer(frame, stack_pointer);
do_thing1();
stack_pointer = _PyFrame_GetStackPointer(frame);
Expand All @@ -1860,7 +1852,6 @@ def test_multiple_labels(self):

LABEL(my_label_2)
{
// Comment
_PyFrame_SetStackPointer(frame, stack_pointer);
do_thing2();
stack_pointer = _PyFrame_GetStackPointer(frame);
Expand Down
8 changes: 5 additions & 3 deletions Python/bytecodes.c
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Original file line number Diff line number Diff line change
Expand Up @@ -163,7 +163,7 @@ dummy_func(
op(_CHECK_PERIODIC_IF_NOT_YIELD_FROM, (--)) {
if ((oparg & RESUME_OPARG_LOCATION_MASK) < RESUME_AFTER_YIELD_FROM) {
_Py_CHECK_EMSCRIPTEN_SIGNALS_PERIODICALLY();
QSBR_QUIESCENT_STATE(tstate); \
QSBR_QUIESCENT_STATE(tstate);
if (_Py_atomic_load_uintptr_relaxed(&tstate->eval_breaker) & _PY_EVAL_EVENTS_MASK) {
int err = _Py_HandlePending(tstate);
ERROR_IF(err != 0, error);
Expand Down Expand Up @@ -2237,7 +2237,8 @@ dummy_func(
PyObject *attr_o = FT_ATOMIC_LOAD_PTR_ACQUIRE(*value_ptr);
DEOPT_IF(attr_o == NULL);
#ifdef Py_GIL_DISABLED
if (!_Py_TryIncrefCompareStackRef(value_ptr, attr_o, &attr)) {
int increfed = _Py_TryIncrefCompareStackRef(value_ptr, attr_o, &attr);
if (!increfed) {
DEOPT_IF(true);
}
#else
Expand Down Expand Up @@ -2314,7 +2315,8 @@ dummy_func(
}
STAT_INC(LOAD_ATTR, hit);
#ifdef Py_GIL_DISABLED
if (!_Py_TryIncrefCompareStackRef(&ep->me_value, attr_o, &attr)) {
int increfed = _Py_TryIncrefCompareStackRef(&ep->me_value, attr_o, &attr);
if (!increfed) {
DEOPT_IF(true);
}
#else
Expand Down
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