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bpo-46823: Implement LOAD_FAST__LOAD_ATTR_INSTANCE_VALUE superinstruction (GH-31484)

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Dennis Sweeney 2022-02-24 09:55:59 -05:00 • committed by GitHub
parent 4fccf91073
commit a52d2528a4
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6 changed files with 91 additions and 4 deletions
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10
Python/specialize.c
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@ -889,6 +889,16 @@ _Py_Specialize_LoadAttr(PyObject *owner, _Py_CODEUNIT *instr, PyObject *name, Sp
return -1;
}
if (err) {
if (_Py_OPCODE(instr[0]) == LOAD_ATTR_INSTANCE_VALUE) {
// Note: instr[-1] exists because there's something on the stack,
// and instr[-2] exists because there's at least a RESUME as well.
if (_Py_OPCODE(instr[-1]) == LOAD_FAST) {
instr[-1] = _Py_MAKECODEUNIT(LOAD_FAST__LOAD_ATTR_INSTANCE_VALUE, _Py_OPARG(instr[-1]));
if (_Py_OPCODE(instr[-2]) == LOAD_FAST__LOAD_FAST) {
instr[-2] = _Py_MAKECODEUNIT(LOAD_FAST, _Py_OPARG(instr[-2]));
}
}
}
goto success;
}
fail: