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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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18 changed files with 832 additions and 688 deletions
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17
Include/internal/pycore_code.h
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@ -92,30 +92,22 @@ typedef struct {
#define INLINE_CACHE_ENTRIES_STORE_SUBSCR CACHE_ENTRIES(_PyStoreSubscrCache)
/* Maximum size of code to quicken, in code units. */
#define MAX_SIZE_TO_QUICKEN 10000
#define QUICKENING_WARMUP_DELAY 8
/* We want to compare to zero for efficiency, so we offset values accordingly */
#define QUICKENING_INITIAL_WARMUP_VALUE (-QUICKENING_WARMUP_DELAY)
#define QUICKENING_WARMUP_COLDEST 1
int _Py_Quicken(PyCodeObject *code);
void _PyCode_Quicken(PyCodeObject *code);
/* Returns 1 if quickening occurs.
* -1 if an error occurs
* 0 otherwise */
static inline int
_Py_IncrementCountAndMaybeQuicken(PyCodeObject *code)
static inline void
_PyCode_Warmup(PyCodeObject *code)
{
if (code->co_warmup != 0) {
code->co_warmup++;
if (code->co_warmup == 0) {
return _Py_Quicken(code) ? -1 : 1;
_PyCode_Quicken(code);
}
}
return 0;
}
extern Py_ssize_t _Py_QuickenedCount;
@ -225,6 +217,7 @@ PyAPI_FUNC(PyCodeObject *) _PyCode_New(struct _PyCodeConstructor *);
extern PyObject* _PyCode_GetVarnames(PyCodeObject *);
extern PyObject* _PyCode_GetCellvars(PyCodeObject *);
extern PyObject* _PyCode_GetFreevars(PyCodeObject *);
extern PyObject* _PyCode_GetCode(PyCodeObject *);
/* Return the ending source code line number from a bytecode index. */
extern int _PyCode_Addr2EndLine(PyCodeObject *, int);