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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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Python/specialize.c
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@ -195,6 +195,10 @@ print_object_stats(FILE *out, ObjectStats *stats)
fprintf(out, "Object method cache collisions: %" PRIu64 "\n", stats->type_cache_collisions);
fprintf(out, "Object method cache dunder hits: %" PRIu64 "\n", stats->type_cache_dunder_hits);
fprintf(out, "Object method cache dunder misses: %" PRIu64 "\n", stats->type_cache_dunder_misses);
fprintf(out, "Optimization attempts: %" PRIu64 "\n", stats->optimization_attempts);
fprintf(out, "Optimization traces created: %" PRIu64 "\n", stats->optimization_traces_created);
fprintf(out, "Optimization traces executed: %" PRIu64 "\n", stats->optimization_traces_executed);
fprintf(out, "Optimization uops executed: %" PRIu64 "\n", stats->optimization_uops_executed);
}
static void