gh-93429: Merge LOAD_METHOD back into LOAD_ATTR

Include/internal/pycore_code.h

@@ -58,7 +58,9 @@ typedef struct {
     _Py_CODEUNIT index;
 } _PyAttrCache;
 
-#define INLINE_CACHE_ENTRIES_LOAD_ATTR CACHE_ENTRIES(_PyAttrCache)
+
+// MUST be the max(_PyAttrCache, _PyLoadMethodCache)
+#define INLINE_CACHE_ENTRIES_LOAD_ATTR CACHE_ENTRIES(_PyLoadMethodCache)
 
 #define INLINE_CACHE_ENTRIES_STORE_ATTR CACHE_ENTRIES(_PyAttrCache)
 
@@ -70,7 +72,6 @@ typedef struct {
     _Py_CODEUNIT descr[4];
 } _PyLoadMethodCache;
 
-#define INLINE_CACHE_ENTRIES_LOAD_METHOD CACHE_ENTRIES(_PyLoadMethodCache)
 
 typedef struct {
     _Py_CODEUNIT counter;
@@ -234,8 +235,6 @@ extern int _Py_Specialize_LoadAttr(PyObject *owner, _Py_CODEUNIT *instr,
 extern int _Py_Specialize_StoreAttr(PyObject *owner, _Py_CODEUNIT *instr,
                                     PyObject *name);
 extern int _Py_Specialize_LoadGlobal(PyObject *globals, PyObject *builtins, _Py_CODEUNIT *instr, PyObject *name);
-extern int _Py_Specialize_LoadMethod(PyObject *owner, _Py_CODEUNIT *instr,
-                                     PyObject *name);
 extern int _Py_Specialize_BinarySubscr(PyObject *sub, PyObject *container, _Py_CODEUNIT *instr);
 extern int _Py_Specialize_StoreSubscr(PyObject *container, PyObject *sub, _Py_CODEUNIT *instr);
 extern int _Py_Specialize_Call(PyObject *callable, _Py_CODEUNIT *instr,

Lib/dis.py

@@ -37,6 +37,7 @@
 LOAD_GLOBAL = opmap['LOAD_GLOBAL']
 BINARY_OP = opmap['BINARY_OP']
 JUMP_BACKWARD = opmap['JUMP_BACKWARD']
+LOAD_ATTR = opmap['LOAD_ATTR']
 
 CACHE = opmap["CACHE"]
 
@@ -463,6 +464,10 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
                     argval, argrepr = _get_name_info(arg//2, get_name)
                     if (arg & 1) and argrepr:
                         argrepr = "NULL + " + argrepr
+                elif deop == LOAD_ATTR:
+                    argval, argrepr = _get_name_info(arg//2, get_name)
+                    if (arg & 1) and argrepr:
+                        argrepr = "NULL|self + " + argrepr
                 else:
                     argval, argrepr = _get_name_info(arg, get_name)
             elif deop in hasjabs:

Lib/importlib/_bootstrap_external.py

@@ -407,6 +407,7 @@ def _write_atomic(path, data, mode=0o666):
 #     Python 3.12a1 3500 (Remove PRECALL opcode)
 #     Python 3.12a1 3501 (YIELD_VALUE oparg == stack_depth)
 #     Python 3.12a1 3502 (LOAD_FAST_CHECK, no NULL-check in LOAD_FAST)
+#     Python 3.12a1 3503 (Merge LOAD_METHOD back into LOAD_ATTR)
 
 #     Python 3.13 will start with 3550
 
@@ -420,7 +421,7 @@ def _write_atomic(path, data, mode=0o666):
 # Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
 # in PC/launcher.c must also be updated.
 
-MAGIC_NUMBER = (3502).to_bytes(2, 'little') + b'\r\n'
+MAGIC_NUMBER = (3503).to_bytes(2, 'little') + b'\r\n'
 
 _RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little')  # For import.c
 

Lib/opcode.py

@@ -285,10 +285,17 @@ def jabs_op(name, op):
     ],
     "LOAD_ATTR": [
         "LOAD_ATTR_ADAPTIVE",
+        # LOAD_ATTR
         "LOAD_ATTR_INSTANCE_VALUE",
         "LOAD_ATTR_MODULE",
         "LOAD_ATTR_SLOT",
         "LOAD_ATTR_WITH_HINT",
+        # LOAD_METHOD
+        "LOAD_ATTR_METHOD_CLASS",
+        "LOAD_ATTR_METHOD_LAZY_DICT",
+        "LOAD_ATTR_METHOD_NO_DICT",
+        "LOAD_ATTR_METHOD_WITH_DICT",
+        "LOAD_ATTR_METHOD_WITH_VALUES",
     ],
     "LOAD_CONST": [
         "LOAD_CONST__LOAD_FAST",
@@ -302,15 +309,6 @@ def jabs_op(name, op):
         "LOAD_GLOBAL_BUILTIN",
         "LOAD_GLOBAL_MODULE",
     ],
-    "LOAD_METHOD": [
-        "LOAD_METHOD_ADAPTIVE",
-        "LOAD_METHOD_CLASS",
-        "LOAD_METHOD_LAZY_DICT",
-        "LOAD_METHOD_MODULE",
-        "LOAD_METHOD_NO_DICT",
-        "LOAD_METHOD_WITH_DICT",
-        "LOAD_METHOD_WITH_VALUES",
-    ],
     "RESUME": [
         "RESUME_QUICK",
     ],
@@ -374,19 +372,14 @@ def jabs_op(name, op):
         "counter": 1,
         "version": 2,
         "index": 1,
+        "keys_version": 2,
+        "descr": 4,
     },
     "STORE_ATTR": {
         "counter": 1,
         "version": 2,
         "index": 1,
     },
-    "LOAD_METHOD": {
-        "counter": 1,
-        "type_version": 2,
-        "dict_offset": 1,
-        "keys_version": 2,
-        "descr": 4,
-    },
     "CALL": {
         "counter": 1,
         "func_version": 2,

Lib/test/test_dis.py

@@ -366,11 +366,11 @@ def bug42562():
 
 %3d        LOAD_GLOBAL              0 (Exception)
            CHECK_EXC_MATCH
-           POP_JUMP_FORWARD_IF_FALSE    18 (to 72)
+           POP_JUMP_FORWARD_IF_FALSE    24 (to 84)
            STORE_FAST               0 (e)
 
 %3d        LOAD_FAST                0 (e)
-           LOAD_ATTR                1 (__traceback__)
+           LOAD_ATTR                2 (__traceback__)
            STORE_FAST               1 (tb)
            POP_EXCEPT
            LOAD_CONST               0 (None)
@@ -967,7 +967,7 @@ def test_load_attr_specialize(self):
 
   1           2 LOAD_CONST               0 ('a')
               4 LOAD_ATTR_SLOT           0 (__class__)
-             14 RETURN_VALUE
+             26 RETURN_VALUE
 """
         co = compile("'a'.__class__", "", "eval")
         self.code_quicken(lambda: exec(co, {}, {}))

Misc/NEWS.d/next/Core and Builtins/2022-06-02-08-28-55.gh-issue-93429.DZTWHx.rst

@@ -0,0 +1 @@
+``LOAD_METHOD`` instruction has been removed. It was merged back into ``LOAD_ATTR``.