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bpo-44187: Quickening infrastructure (GH-26264)

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* Add co_firstinstr field to code object.

* Implement barebones quickening.

* Use non-quickened bytecode when tracing.

* Add NEWS item

* Add new file to Windows build.

* Don't specialize instructions with EXTENDED_ARG.
This commit is contained in:
Mark Shannon 2021-06-07 18:38:06 +01:00 • committed by GitHub
parent 89e50ab36f
commit 001eb520b5
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GPG key ID: 4AEE18F83AFDEB23
12 changed files with 416 additions and 12 deletions
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10
Objects/codeobject.c
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@ -211,6 +211,7 @@ init_code(PyCodeObject *co, struct _PyCodeConstructor *con)
Py_INCREF(con->code);
co->co_code = con->code;
co->co_firstinstr = (_Py_CODEUNIT *)PyBytes_AS_STRING(con->code);
co->co_firstlineno = con->firstlineno;
Py_INCREF(con->linetable);
co->co_linetable = con->linetable;
@ -250,6 +251,8 @@ init_code(PyCodeObject *co, struct _PyCodeConstructor *con)
co->co_opcache = NULL;
co->co_opcache_flag = 0;
co->co_opcache_size = 0;
co->co_warmup = QUICKENING_INITIAL_WARMUP_VALUE;
co->co_quickened = NULL;
}
/* The caller is responsible for ensuring that the given data is valid. */
@ -376,7 +379,8 @@ PyCode_NewWithPosOnlyArgs(int argcount, int posonlyargcount, int kwonlyargcount,
if (_PyCode_Validate(&con) < 0) {
return NULL;
}
assert(PyBytes_GET_SIZE(code) % sizeof(_Py_CODEUNIT) == 0);
assert(_Py_IS_ALIGNED(PyBytes_AS_STRING(code), sizeof(_Py_CODEUNIT)));
if (nlocals != PyTuple_GET_SIZE(varnames)) {
PyErr_SetString(PyExc_ValueError,
"code: co_nlocals != len(co_varnames)");
@ -1039,6 +1043,10 @@ code_dealloc(PyCodeObject *co)
PyMem_Free(co->co_cell2arg);
if (co->co_weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject*)co);
if (co->co_quickened) {
PyMem_Free(co->co_quickened);
_Py_QuickenedCount--;
}
PyObject_Free(co);
}