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GH-128685: Specialize (rather than quicken) LOAD_CONST into LOAD_CONST_[IM]MORTAL (GH-128708)

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Mark Shannon 2025-01-13 10:30:28 +00:00 • committed by GitHub
parent 29fe8072cf
commit ddd959987c
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GPG key ID: B5690EEEBB952194
14 changed files with 121 additions and 65 deletions
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26
Python/generated_cases.c.h generated
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@ -5913,8 +5913,18 @@
next_instr += 1;
INSTRUCTION_STATS(LOAD_CONST);
PREDICTED(LOAD_CONST);
_Py_CODEUNIT* const this_instr = next_instr - 1;
(void)this_instr;
_PyStackRef value;
value = PyStackRef_FromPyObjectNew(GETITEM(FRAME_CO_CONSTS, oparg));
/* We can't do this in the bytecode compiler as
* marshalling can intern strings and make them immortal. */
PyObject *obj = GETITEM(FRAME_CO_CONSTS, oparg);
value = PyStackRef_FromPyObjectNew(obj);
#if ENABLE_SPECIALIZATION
if (this_instr->op.code == LOAD_CONST) {
this_instr->op.code = _Py_IsImmortal(obj) ? LOAD_CONST_IMMORTAL : LOAD_CONST_MORTAL;
}
#endif
stack_pointer[0] = value;
stack_pointer += 1;
assert(WITHIN_STACK_BOUNDS());
@ -5936,6 +5946,20 @@
DISPATCH();
}
TARGET(LOAD_CONST_MORTAL) {
frame->instr_ptr = next_instr;
next_instr += 1;
INSTRUCTION_STATS(LOAD_CONST_MORTAL);
static_assert(0 == 0, "incorrect cache size");
_PyStackRef value;
PyObject *obj = GETITEM(FRAME_CO_CONSTS, oparg);
value = PyStackRef_FromPyObjectNew(obj);
stack_pointer[0] = value;
stack_pointer += 1;
assert(WITHIN_STACK_BOUNDS());
DISPATCH();
}
TARGET(LOAD_DEREF) {
frame->instr_ptr = next_instr;
next_instr += 1;