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bpo-46841: Move the cache for LOAD_GLOBAL inline. (GH-31575)

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Mark Shannon 2022-02-28 12:56:29 +00:00 • committed by GitHub
parent da7d99a4de
commit 4558af5a8f
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10 changed files with 284 additions and 232 deletions
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28
Python/specialize.c
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@ -59,7 +59,6 @@ static uint8_t adaptive_opcodes[256] = {
/* The number of cache entries required for a "family" of instructions. */
static uint8_t cache_requirements[256] = {
[LOAD_ATTR] = 1, // _PyAdaptiveEntry
[LOAD_GLOBAL] = 2, /* _PyAdaptiveEntry and _PyLoadGlobalCache */
[LOAD_METHOD] = 3, /* _PyAdaptiveEntry, _PyAttrCache and _PyObjectCache */
[BINARY_SUBSCR] = 2, /* _PyAdaptiveEntry, _PyObjectCache */
[STORE_SUBSCR] = 0,
@ -1208,11 +1207,12 @@ fail:
int
_Py_Specialize_LoadGlobal(
PyObject *globals, PyObject *builtins,
_Py_CODEUNIT *instr, PyObject *name,
SpecializedCacheEntry *cache)
_Py_CODEUNIT *instr, PyObject *name)
{
_PyAdaptiveEntry *cache0 = &cache->adaptive;
_PyLoadGlobalCache *cache1 = &cache[-1].load_global;
assert(_PyOpcode_InlineCacheEntries[LOAD_GLOBAL] ==
INLINE_CACHE_ENTRIES_LOAD_GLOBAL);
/* Use inline cache */
_PyLoadGlobalCache *cache = (_PyLoadGlobalCache *)(instr + 1);
assert(PyUnicode_CheckExact(name));
if (!PyDict_CheckExact(globals)) {
goto fail;
@ -1231,8 +1231,8 @@ _Py_Specialize_LoadGlobal(
if (keys_version == 0) {
goto fail;
}
cache1->module_keys_version = keys_version;
cache0->index = (uint16_t)index;
cache->index = (uint16_t)index;
write32(&cache->module_keys_version, keys_version);
*instr = _Py_MAKECODEUNIT(LOAD_GLOBAL_MODULE, _Py_OPARG(*instr));
goto success;
}
@ -1258,20 +1258,24 @@ _Py_Specialize_LoadGlobal(
SPECIALIZATION_FAIL(LOAD_GLOBAL, SPEC_FAIL_OUT_OF_VERSIONS);
goto fail;
}
cache1->module_keys_version = globals_version;
cache1->builtin_keys_version = builtins_version;
cache0->index = (uint16_t)index;
if (builtins_version > UINT16_MAX) {
SPECIALIZATION_FAIL(LOAD_GLOBAL, SPEC_FAIL_OUT_OF_RANGE);
goto fail;
}
cache->index = (uint16_t)index;
write32(&cache->module_keys_version, globals_version);
cache->builtin_keys_version = (uint16_t)builtins_version;
*instr = _Py_MAKECODEUNIT(LOAD_GLOBAL_BUILTIN, _Py_OPARG(*instr));
goto success;
fail:
STAT_INC(LOAD_GLOBAL, failure);
assert(!PyErr_Occurred());
cache_backoff(cache0);
cache->counter = ADAPTIVE_CACHE_BACKOFF;
return 0;
success:
STAT_INC(LOAD_GLOBAL, success);
assert(!PyErr_Occurred());
cache0->counter = initial_counter_value();
cache->counter = initial_counter_value();
return 0;
}