GH-93429: Merge LOAD_METHOD back into LOAD_ATTR (GH-93430)

Author: Fidget-Spinner

Include/internal/pycore_code.h

@@ -58,18 +58,18 @@ typedef struct {
     _Py_CODEUNIT index;
 } _PyAttrCache;
 
-#define INLINE_CACHE_ENTRIES_LOAD_ATTR CACHE_ENTRIES(_PyAttrCache)
-
-#define INLINE_CACHE_ENTRIES_STORE_ATTR CACHE_ENTRIES(_PyAttrCache)
-
 typedef struct {
     _Py_CODEUNIT counter;
     _Py_CODEUNIT type_version[2];
     _Py_CODEUNIT keys_version[2];
     _Py_CODEUNIT descr[4];
 } _PyLoadMethodCache;
 
-#define INLINE_CACHE_ENTRIES_LOAD_METHOD CACHE_ENTRIES(_PyLoadMethodCache)
+
+// MUST be the max(_PyAttrCache, _PyLoadMethodCache)
+#define INLINE_CACHE_ENTRIES_LOAD_ATTR CACHE_ENTRIES(_PyLoadMethodCache)
+
+#define INLINE_CACHE_ENTRIES_STORE_ATTR CACHE_ENTRIES(_PyAttrCache)
 
 typedef struct {
     _Py_CODEUNIT counter;
@@ -233,8 +233,6 @@ 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,

Include/internal/pycore_opcode.h

@@ -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:

Include/opcode.h

@@ -408,6 +408,7 @@ def _write_atomic(path, data, mode=0o666):
 #     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 (Shrink LOAD_METHOD cache)
+#     Python 3.12a1 3504 (Merge LOAD_METHOD back into LOAD_ATTR)
 
 #     Python 3.13 will start with 3550
 
@@ -421,7 +422,7 @@ 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 = (3503).to_bytes(2, 'little') + b'\r\n'
+MAGIC_NUMBER = (3504).to_bytes(2, 'little') + b'\r\n'
 
 _RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little')  # For import.c