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GH-128914: Remove all but one conditional stack effects (GH-129226)

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* Remove all 'if (0)' and 'if (1)' conditional stack effects

* Use array instead of conditional for BUILD_SLICE args

* Refactor LOAD_GLOBAL to use a common conditional uop

* Remove conditional stack effects from LOAD_ATTR specializations

* Replace conditional stack effects in LOAD_ATTR with a 0 or 1 sized array.

* Remove conditional stack effects from CALL_FUNCTION_EX
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Mark Shannon 2025-01-27 16:24:48 +00:00 • committed by GitHub
parent 8ec76d9034
commit 75b4962157
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GPG key ID: B5690EEEBB952194
19 changed files with 518 additions and 758 deletions
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8
Python/optimizer_analysis.c
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@ -109,10 +109,14 @@ convert_global_to_const(_PyUOpInstruction *inst, PyObject *obj)
return NULL;
}
if (_Py_IsImmortal(res)) {
inst->opcode = (inst->oparg & 1) ? _LOAD_CONST_INLINE_BORROW_WITH_NULL : _LOAD_CONST_INLINE_BORROW;
inst->opcode = _LOAD_CONST_INLINE_BORROW;
}
else {
inst->opcode = (inst->oparg & 1) ? _LOAD_CONST_INLINE_WITH_NULL : _LOAD_CONST_INLINE;
inst->opcode = _LOAD_CONST_INLINE;
}
if (inst->oparg & 1) {
assert(inst[1].opcode == _PUSH_NULL_CONDITIONAL);
assert(inst[1].oparg & 1);
}
inst->operand0 = (uint64_t)res;
return res;