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gh-131798: Optimize _ITER_CHECK_TUPLE (GH-134803)

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Noam Cohen 2025-05-27 21:30:17 +03:00 • committed by GitHub
parent ac539e7e0d
commit 79d81f7cba
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1
Misc/NEWS.d/next/Core_and_Builtins/2025-05-27-20-21-34.gh-issue-131798.b32zkl.rst Normal file
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@ -0,0 +1 @@
Allow the JIT to remove unnecessary ``_ITER_CHECK_TUPLE`` ops.

7
Python/optimizer_bytecodes.c
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@ -914,6 +914,13 @@ dummy_func(void) {
}
}
op(_ITER_CHECK_TUPLE, (iter, null_or_index -- iter, null_or_index)) {
if (sym_matches_type(iter, &PyTuple_Type)) {
REPLACE_OP(this_instr, _NOP, 0, 0);
}
sym_set_type(iter, &PyTuple_Type);
}
op(_ITER_NEXT_RANGE, (iter, null_or_index -- iter, null_or_index, next)) {
next = sym_new_type(ctx, &PyLong_Type);
}

6
Python/optimizer_cases.c.h generated
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@ -1615,6 +1615,12 @@
}
case _ITER_CHECK_TUPLE: {
JitOptSymbol *iter;
iter = stack_pointer[-2];
if (sym_matches_type(iter, &PyTuple_Type)) {
REPLACE_OP(this_instr, _NOP, 0, 0);
}
sym_set_type(iter, &PyTuple_Type);
break;
}