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gh-104584: Baby steps towards generating and executing traces (#105924)

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Added a new, experimental, tracing optimizer and interpreter (a.k.a. "tier 2"). This currently pessimizes, so don't use yet -- this is infrastructure so we can experiment with optimizing passes. To enable it, pass ``-Xuops`` or set ``PYTHONUOPS=1``. To get debug output, set ``PYTHONUOPSDEBUG=N`` where ``N`` is a debug level (0-4, where 0 is no debug output and 4 is excessively verbose).

All of this code is likely to change dramatically before the 3.13 feature freeze. But this is a first step.
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Guido van Rossum 2023-06-26 19:02:57 -07:00 • committed by GitHub
parent d3af83b934
commit 51fc725117
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21 changed files with 2559 additions and 305 deletions
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4
Python/bytecodes.c
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@ -52,8 +52,6 @@
#define family(name, ...) static int family_##name
#define pseudo(name) static int pseudo_##name
typedef PyObject *(*convertion_func_ptr)(PyObject *);
// Dummy variables for stack effects.
static PyObject *value, *value1, *value2, *left, *right, *res, *sum, *prod, *sub;
static PyObject *container, *start, *stop, *v, *lhs, *rhs, *res2;
@ -2182,7 +2180,7 @@ dummy_func(
frame = executor->execute(executor, frame, stack_pointer);
if (frame == NULL) {
frame = cframe.current_frame;
goto error;
goto resume_with_error;
}
goto resume_frame;
}