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bpo-46841: Fix BINARY_OP's handling of inline caches (GH-31671)

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Brandt Bucher 2022-03-04 10:51:27 -08:00 • committed by GitHub
parent cedd2473a9
commit c4d2d57eef
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3 changed files with 7 additions and 3 deletions
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Python/specialize.c
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@ -1951,7 +1951,8 @@ _Py_Specialize_BinaryOp(PyObject *lhs, PyObject *rhs, _Py_CODEUNIT *instr,
break;
}
if (PyUnicode_CheckExact(lhs)) {
if (_Py_OPCODE(instr[1]) == STORE_FAST && Py_REFCNT(lhs) == 2) {
_Py_CODEUNIT next = instr[INLINE_CACHE_ENTRIES_BINARY_OP + 1];
if (_Py_OPCODE(next) == STORE_FAST && Py_REFCNT(lhs) == 2) {
*instr = _Py_MAKECODEUNIT(BINARY_OP_INPLACE_ADD_UNICODE,
oparg);
goto success;