gh-131798: JIT: Split CALL_STR_1 into several uops #132849
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tomasr8
commented
Apr 24, 2025
Python/optimizer_bytecodes.c
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| if (sym_matches_type(arg, &PyUnicode_Type)) { | ||
| // e.g. str('foo') or str(foo) where foo is known to be a string | ||
| PyObject *value = sym_get_const(ctx, arg); | ||
| res = sym_new_const(ctx, value); | ||
| } |
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This is an optimization that Brandt suggested. When in str(foo), foo is known to be a string, we can propagate it to the output. I also added a test for this case.
brandtbucher
approved these changes
Apr 24, 2025
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Thanks for the review! |
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CALL_STR_1is equivalent tostr(...).Very similar to previous work on splitting up
CALL_TYPE_1: #132419This splits the instruction into a smaller instruction + 2 guards which can be optimized away. This also sets the return type to
str.