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GH-104584: Allow optimizers to opt out of optimizing. (GH-105244)

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Mark Shannon 2023-06-05 09:44:23 +01:00 • committed by GitHub
parent 9efaff5fd3
commit e8ecb9ee6b
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2 changed files with 20 additions and 12 deletions
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3
Include/cpython/optimizer.h
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@ -21,7 +21,8 @@ typedef struct _PyExecutorObject {
typedef struct _PyOptimizerObject _PyOptimizerObject;
typedef _PyExecutorObject *(*optimize_func)(_PyOptimizerObject* self, PyCodeObject *code, _Py_CODEUNIT *instr);
/* Should return > 0 if a new executor is created. O if no executor is produced and < 0 if an error occurred. */
typedef int (*optimize_func)(_PyOptimizerObject* self, PyCodeObject *code, _Py_CODEUNIT *instr, _PyExecutorObject **);
typedef struct _PyOptimizerObject {
PyObject_HEAD

29
Python/optimizer.c
View file

@ -93,14 +93,15 @@ PyUnstable_Replace_Executor(PyCodeObject *code, _Py_CODEUNIT *instr, _PyExecutor
return 0;
}
static _PyExecutorObject *
static int
error_optimize(
_PyOptimizerObject* self,
PyCodeObject *code,
_Py_CODEUNIT *instr)
_Py_CODEUNIT *instr,
_PyExecutorObject **exec)
{
PyErr_Format(PyExc_SystemError, "Should never call error_optimize");
return NULL;
return -1;
}
static PyTypeObject DefaultOptimizer_Type = {
@ -154,15 +155,19 @@ _PyOptimizer_BackEdge(_PyInterpreterFrame *frame, _Py_CODEUNIT *src, _Py_CODEUNI
return frame;
}
_PyOptimizerObject *opt = interp->optimizer;
_PyExecutorObject *executor = opt->optimize(opt, frame->f_code, dest);
if (executor == NULL) {
return NULL;
_PyExecutorObject *executor;
int err = opt->optimize(opt, frame->f_code, dest, &executor);
if (err <= 0) {
if (err < 0) {
return NULL;
}
_PyFrame_SetStackPointer(frame, stack_pointer);
return frame;
}
insert_executor(frame->f_code, src, index, executor);
return executor->execute(executor, frame, stack_pointer);
}
/** Test support **/
@ -202,21 +207,23 @@ counter_execute(_PyExecutorObject *self, _PyInterpreterFrame *frame, PyObject **
return frame;
}
static _PyExecutorObject *
static int
counter_optimize(
_PyOptimizerObject* self,
PyCodeObject *code,
_Py_CODEUNIT *instr)
_Py_CODEUNIT *instr,
_PyExecutorObject **exec_ptr)
{
_PyCounterExecutorObject *executor = (_PyCounterExecutorObject *)_PyObject_New(&CounterExecutor_Type);
if (executor == NULL) {
return NULL;
return -1;
}
executor->executor.execute = counter_execute;
Py_INCREF(self);
executor->optimizer = (_PyCounterOptimizerObject *)self;
executor->next_instr = instr;
return (_PyExecutorObject *)executor;
*exec_ptr = (_PyExecutorObject *)executor;
return 1;
}
static PyObject *