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gh-118335: Configure Tier 2 interpreter at build time (#118339)

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The code for Tier 2 is now only compiled when configured
with `--enable-experimental-jit[=yes|interpreter]`.

We drop support for `PYTHON_UOPS` and -`Xuops`,
but you can disable the interpreter or JIT
at runtime by setting `PYTHON_JIT=0`.
You can also build it without enabling it by default
using `--enable-experimental-jit=yes-off`;
enable with `PYTHON_JIT=1`.

On Windows, the `build.bat` script supports
`--experimental-jit`, `--experimental-jit-off`,
`--experimental-interpreter`.

In the C code, `_Py_JIT` is defined as before
when the JIT is enabled; the new variable
`_Py_TIER2` is defined when the JIT *or* the
interpreter is enabled. It is actually a bitmask:
1: JIT; 2: default-off; 4: interpreter.
This commit is contained in:
Guido van Rossum 2024-04-30 18:26:34 -07:00 • committed by GitHub
parent 9c468e2c5d
commit 7d83f7bcc4
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GPG key ID: B5690EEEBB952194
32 changed files with 181 additions and 42 deletions
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6
Python/pystate.c
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@ -653,8 +653,10 @@ init_interpreter(PyInterpreterState *interp,
}
interp->sys_profile_initialized = false;
interp->sys_trace_initialized = false;
#ifdef _Py_TIER2
(void)_Py_SetOptimizer(interp, NULL);
interp->executor_list_head = NULL;
#endif
if (interp != &runtime->_main_interpreter) {
/* Fix the self-referential, statically initialized fields. */
interp->dtoa = (struct _dtoa_state)_dtoa_state_INIT(interp);
@ -806,9 +808,11 @@ interpreter_clear(PyInterpreterState *interp, PyThreadState *tstate)
tstate->_status.cleared = 0;
}
#ifdef _Py_TIER2
_PyOptimizerObject *old = _Py_SetOptimizer(interp, NULL);
assert(old != NULL);
Py_DECREF(old);
#endif
/* It is possible that any of the objects below have a finalizer
that runs Python code or otherwise relies on a thread state
@ -2821,9 +2825,11 @@ _PyInterpreterState_SetEvalFrameFunc(PyInterpreterState *interp,
if (eval_frame == interp->eval_frame) {
return;
}
#ifdef _Py_TIER2
if (eval_frame != NULL) {
_Py_Executors_InvalidateAll(interp, 1);
}
#endif
RARE_EVENT_INC(set_eval_frame_func);
interp->eval_frame = eval_frame;
}