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gh-131798: JIT: Optimize _CALL_TYPE_1 when the result is known - #135194
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brandtbucher merged 4 commits intoJun 6, 2025
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Fidget-Spinner
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The test failures should be fixed by #135204, let me update main to make sure CI is all green :) |
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brandtbucher
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Even more JIT magic, I love it.
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Lib/test/test_capi/test_opt.py
| self.assertEqual(res, TIER2_THRESHOLD) | ||
| self.assertIsNotNone(ex) | ||
| uops = get_opnames(ex) | ||
| self.assertIn("_CALL_TYPE_1", uops) |
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Super cool when older tests like this "break" with a new optimization. :)
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Followup to #134369 (comment)
This completely removes _CALL_TYPE_1 when the abstract interpreter is able to deduce the result (by knowing the type of the argument).
For example, for something like type(42), we currently do
Note that we still do the call even when we know the result.
In this PR, when the result is known, _CALL_TYPE_1 is replaced with _POP_CALL_ONE_LOAD_CONST_INLINE_BORROW:
Thanks to some previous work on optimizing remove_unneeded_uops this becomes just:
that is, the entire call is replaced with a load.