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bpo-43693: Eliminate unused "fast locals". #26587

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merged 10 commits into from
Jun 15, 2021
Merged

bpo-43693: Eliminate unused "fast locals". #26587

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d63f73e
Merge cell locals with var locals for args.
ericsnowcurrently May 10, 2021
db2fd06
Eliminate co_cell2arg.
ericsnowcurrently May 10, 2021
6cae5e0
Add a NEWS entry.
ericsnowcurrently Jun 7, 2021
b5ef8e1
Bump the .pyc magic number.
ericsnowcurrently Jun 9, 2021
0e1cbc4
Drop an expensive check from super_init_without_args().
ericsnowcurrently Jun 15, 2021
2ec5ae4
Do not export _PyFrame_OpAlreadyRan().
ericsnowcurrently Jun 15, 2021
4b086e9
Check only the free vars in super_init_without_args().
ericsnowcurrently Jun 15, 2021
09c3cdd
Simplify a comment.
ericsnowcurrently Jun 15, 2021
8693744
Sort the MAKE_CELL ops by oparg.
ericsnowcurrently Jun 15, 2021
bdb12a7
Add a light-weight check to super_init_without_args().
ericsnowcurrently Jun 15, 2021
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Simplify a comment.
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@ericsnowcurrently
ericsnowcurrently committed Jun 15, 2021
commit 09c3cdd81987330c443e9ed0fb9590479fd3c295
5 changes: 2 additions & 3 deletions Python/ceval.c
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Expand Up @@ -2922,10 +2922,9 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
}

case TARGET(MAKE_CELL): {
// "initial" is probably NULL but not if it's an arg (or set
// via PyFrame_LocalsToFast() before MAKE_CELL has run).
PyObject *initial = GETLOCAL(oparg);
// If "initial" isn't NULL then it is an arg value set
// in _PyEval_MakeFrameVector() (likely) or an initial
// value set in PyFrame_LocalsToFast() (unlikely).
PyObject *cell = PyCell_New(initial);
if (cell == NULL) {
goto error;
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