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gh-130415: Narrowing to constants in branches involving is comparisons with a constant (GH-143895)

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reiden 2026-01-22 17:37:45 +08:00 • committed by GitHub
parent 6181b69970
commit 0b08438ea6
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7 changed files with 241 additions and 20 deletions
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8
Python/optimizer_bytecodes.c
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@ -38,6 +38,8 @@ typedef struct _Py_UOpsAbstractFrame _Py_UOpsAbstractFrame;
#define sym_new_compact_int _Py_uop_sym_new_compact_int
#define sym_is_compact_int _Py_uop_sym_is_compact_int
#define sym_new_truthiness _Py_uop_sym_new_truthiness
#define sym_new_predicate _Py_uop_sym_new_predicate
#define sym_apply_predicate_narrowing _Py_uop_sym_apply_predicate_narrowing
extern int
optimize_to_bool(
@ -533,7 +535,7 @@ dummy_func(void) {
}
op(_IS_OP, (left, right -- b, l, r)) {
b = sym_new_type(ctx, &PyBool_Type);
b = sym_new_predicate(ctx, left, right, (oparg ? JIT_PRED_IS_NOT : JIT_PRED_IS));
l = left;
r = right;
}
@ -1173,6 +1175,8 @@ dummy_func(void) {
}
op(_GUARD_IS_TRUE_POP, (flag -- )) {
sym_apply_predicate_narrowing(ctx, flag, true);
if (sym_is_const(ctx, flag)) {
PyObject *value = sym_get_const(ctx, flag);
assert(value != NULL);
@ -1191,6 +1195,8 @@ dummy_func(void) {
}
op(_GUARD_IS_FALSE_POP, (flag -- )) {
sym_apply_predicate_narrowing(ctx, flag, false);
if (sym_is_const(ctx, flag)) {
PyObject *value = sym_get_const(ctx, flag);
assert(value != NULL);