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bpo-46841: Quicken code in-place (GH-31888)

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* Moves the bytecode to the end of the corresponding PyCodeObject, and quickens it in-place.

* Removes the almost-always-unused co_varnames, co_freevars, and co_cellvars member caches

* _PyOpcode_Deopt is a new mapping from all opcodes to their un-quickened forms.

* _PyOpcode_InlineCacheEntries is renamed to _PyOpcode_Caches

* _Py_IncrementCountAndMaybeQuicken is renamed to _PyCode_Warmup

* _Py_Quicken is renamed to _PyCode_Quicken

* _co_quickened is renamed to _co_code_adaptive (and is now a read-only memoryview).

* Do not emit unused nonzero opargs anymore in the compiler.
This commit is contained in:
Brandt Bucher 2022-03-21 04:11:17 -07:00 • committed by GitHub
parent 08eb754d84
commit 2bde6827ea
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GPG key ID: 4AEE18F83AFDEB23
18 changed files with 832 additions and 688 deletions
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5
Objects/typeobject.c
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@ -8949,7 +8949,10 @@ super_init_without_args(_PyInterpreterFrame *cframe, PyCodeObject *co,
// "firstarg" is a cell here unless (very unlikely) super()
// was called from the C-API before the first MAKE_CELL op.
if (cframe->f_lasti >= 0) {
assert(_Py_OPCODE(*co->co_firstinstr) == MAKE_CELL || _Py_OPCODE(*co->co_firstinstr) == COPY_FREE_VARS);
// MAKE_CELL and COPY_FREE_VARS have no quickened forms, so no need
// to use _PyOpcode_Deopt here:
assert(_Py_OPCODE(_PyCode_CODE(co)[0]) == MAKE_CELL ||
_Py_OPCODE(_PyCode_CODE(co)[0]) == COPY_FREE_VARS);
assert(PyCell_Check(firstarg));
firstarg = PyCell_GET(firstarg);
}