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gh-148235: remove duplicate uops `_LOAD_CONST_UNDER_INLINE(_BORROW)` in JIT by NekoAsakura · Pull Request #148236 · python/cpython · GitHub

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gh-148235: remove duplicate uops _LOAD_CONST_UNDER_INLINE(_BORROW) in JIT #148236

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Merged
Fidget-Spinner merged 3 commits into from
Apr 8, 2026
+1,088 −1,288
Conversation 8 Commits 3 Checks 76 Files changed 8
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gh-148235: remove duplicate uops _LOAD_CONST_UNDER_INLINE(_BORROW) in JIT #148236

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gh-148235: remove duplicate uops `_INSERT_1_LOAD_CONST_INLINE(_BORROW…
NekoAsakura Apr 8, 2026
8af132b
gh-148235: remove duplicate uops `_LOAD_CONST_UNDER_INLINE(_BORROW)` …
NekoAsakura Apr 8, 2026
5f63c41
gh-148235: remove duplicate uops `_LOAD_CONST_UNDER_INLINE(_BORROW)` …
NekoAsakura Apr 8, 2026
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2,150 changes: 1,071 additions & 1,079 deletions Include/internal/pycore_uop_ids.h
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38 changes: 0 additions & 38 deletions Include/internal/pycore_uop_metadata.h
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8 changes: 3 additions & 5 deletions Lib/test/test_capi/test_opt.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1846,7 +1846,7 @@ def testfunc(n):
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertNotIn("_UNARY_INVERT", uops)
self.assertIn("_INSERT_1_LOAD_CONST_INLINE_BORROW", uops)
self.assertIn("_LOAD_CONST_INLINE_BORROW", uops)

Fidget-Spinner Apr 8, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Why this change?

NekoAsakura Apr 8, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

_INSERT_1_LOAD_CONST_INLINE_BORROW has no op_without_push entry on main, therefore not simplified away by remove_unneeded_uops.

def test_compare_op_pop_two_load_const_inline_borrow(self):
def testfunc(n):
Expand Down Expand Up @@ -3192,8 +3192,8 @@ def f(n):
self.assertEqual(res, TIER2_THRESHOLD)
uops = get_opnames(ex)
self.assertNotIn("_LOAD_ATTR_METHOD_NO_DICT", uops)
self.assertNotIn("_LOAD_CONST_UNDER_INLINE", uops)
self.assertIn("_LOAD_CONST_UNDER_INLINE_BORROW", uops)
self.assertNotIn("_INSERT_1_LOAD_CONST_INLINE", uops)
self.assertIn("_INSERT_1_LOAD_CONST_INLINE_BORROW", uops)

def test_store_fast_refcount_elimination(self):
def foo(x):
Expand Down Expand Up @@ -4009,8 +4009,6 @@ class A:
self.assertIsNotNone(ex)
uops = get_opnames(ex)
self.assertNotIn("_REPLACE_WITH_TRUE", uops)
self.assertIn("_INSERT_1_LOAD_CONST_INLINE_BORROW", uops)

Fidget-Spinner Apr 8, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

why this change?

NekoAsakura Apr 8, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Same reason.
self.assertEqual(count_ops(ex, "_POP_TOP_NOP"), 1)

def test_attr_promotion_failure(self):
# We're not testing for any specific uops here, just
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12 changes: 0 additions & 12 deletions Python/bytecodes.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5965,18 +5965,6 @@ dummy_func(
value = PyStackRef_FromPyObjectBorrow(ptr);
}

tier2 op(_LOAD_CONST_UNDER_INLINE, (ptr/4, old -- value, new)) {
new = old;
DEAD(old);
value = PyStackRef_FromPyObjectNew(ptr);
}

tier2 op(_LOAD_CONST_UNDER_INLINE_BORROW, (ptr/4, old -- value, new)) {
new = old;
DEAD(old);
value = PyStackRef_FromPyObjectBorrow(ptr);
}

tier2 op(_START_EXECUTOR, (executor/4 --)) {
#ifndef _Py_JIT
assert(current_executor == (_PyExecutorObject*)executor);
Expand Down
114 changes: 0 additions & 114 deletions Python/executor_cases.c.h
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4 changes: 2 additions & 2 deletions Python/optimizer_analysis.c
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Original file line number Diff line number Diff line change
Expand Up @@ -611,8 +611,8 @@ const uint16_t op_without_push[MAX_UOP_ID + 1] = {
[_COPY] = _NOP,
[_LOAD_CONST_INLINE] = _NOP,
[_LOAD_CONST_INLINE_BORROW] = _NOP,
[_LOAD_CONST_UNDER_INLINE] = _POP_TOP_LOAD_CONST_INLINE,
[_LOAD_CONST_UNDER_INLINE_BORROW] = _POP_TOP_LOAD_CONST_INLINE_BORROW,
[_INSERT_1_LOAD_CONST_INLINE] = _POP_TOP_LOAD_CONST_INLINE,
[_INSERT_1_LOAD_CONST_INLINE_BORROW] = _POP_TOP_LOAD_CONST_INLINE_BORROW,
[_LOAD_FAST] = _NOP,
[_LOAD_FAST_BORROW] = _NOP,
[_LOAD_SMALL_INT] = _NOP,
Expand Down
12 changes: 6 additions & 6 deletions Python/optimizer_bytecodes.c
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Original file line number Diff line number Diff line change
Expand Up @@ -925,8 +925,8 @@ dummy_func(void) {
PyTypeObject *type = sym_get_type(owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
_LOAD_CONST_UNDER_INLINE_BORROW,
_LOAD_CONST_UNDER_INLINE);
_INSERT_1_LOAD_CONST_INLINE_BORROW,
_INSERT_1_LOAD_CONST_INLINE);
self = owner;
}

Expand All @@ -935,8 +935,8 @@ dummy_func(void) {
PyTypeObject *type = sym_get_type(owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
_LOAD_CONST_UNDER_INLINE_BORROW,
_LOAD_CONST_UNDER_INLINE);
_INSERT_1_LOAD_CONST_INLINE_BORROW,
_INSERT_1_LOAD_CONST_INLINE);
self = owner;
}

Expand All @@ -945,8 +945,8 @@ dummy_func(void) {
PyTypeObject *type = sym_get_type(owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
_LOAD_CONST_UNDER_INLINE_BORROW,
_LOAD_CONST_UNDER_INLINE);
_INSERT_1_LOAD_CONST_INLINE_BORROW,
_INSERT_1_LOAD_CONST_INLINE);
self = owner;
}

Expand Down
38 changes: 6 additions & 32 deletions Python/optimizer_cases.c.h
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