gh-131798: JIT: Optimize _CALL_LEN when the length is known #135260
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tomasr8
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Jun 8, 2025
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| int tuple_length = sym_tuple_length(arg); | ||
| if (tuple_length >= 0) { | ||
| PyObject *temp = PyLong_FromLong(tuple_length); | ||
| if (temp == NULL) { | ||
| goto error; | ||
| } | ||
| if (_Py_IsImmortal(temp)) { | ||
| REPLACE_OP(this_instr, _POP_CALL_ONE_LOAD_CONST_INLINE_BORROW, | ||
| 0, (uintptr_t)temp); | ||
| } | ||
| res = sym_new_const(ctx, temp); | ||
| Py_DECREF(temp); | ||
| } |
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This is basically copied from the recent _GET_LEN optimization
brandtbucher
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Jun 9, 2025
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Looks good! I'll leave this for you to merge yourself. ;)
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I'm planning to merge this once the tests pass :) |
Pranjal095
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Jul 12, 2025
…thon#135260) * Add news entry * Optimize _CALL_LEN * Simplify tests
taegyunkim
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Aug 4, 2025
…thon#135260) * Add news entry * Optimize _CALL_LEN * Simplify tests
Agent-Hellboy
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Aug 19, 2025
…thon#135260) * Add news entry * Optimize _CALL_LEN * Simplify tests
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This uses the same principle as #135194 to completely remove
_CALL_LENwhen the length is known.I don't know how common it is to actually know the length exactly so please let me know if this is not worth it, but given that
_CALL_LENis the most common builtin call, it felt worth to optimize this case.