gh-105481: generate op IDs from bytecode.c instead of hard coding them in opcode.py (#107971)

Tools/build/generate_opcode_h.py

@@ -27,27 +27,6 @@ opcode_h_footer = """
 #endif /* !Py_OPCODE_H */
 """
 
-opcode_ids_h_header = f"""
-// Auto-generated by {SCRIPT_NAME} from {PYTHON_OPCODE}
-
-#ifndef Py_OPCODE_IDS_H
-#define Py_OPCODE_IDS_H
-#ifdef __cplusplus
-extern "C" {{
-#endif
-
-
-/* Instruction opcodes for compiled code */
-""".lstrip()
-
-opcode_ids_h_footer = """
-
-#ifdef __cplusplus
-}
-#endif
-#endif /* !Py_OPCODE_IDS_H */
-"""
-
 internal_header = f"""
 // Auto-generated by {SCRIPT_NAME} from {PYTHON_OPCODE}
 
@@ -83,52 +62,10 @@ def get_python_module_dict(filename):
     return mod
 
 def main(opcode_py,
-         _opcode_metadata_py='Lib/_opcode_metadata.py',
-         opcode_ids_h='Include/opcode_ids.h',
          opcode_h='Include/opcode.h',
-         opcode_targets_h='Python/opcode_targets.h',
          internal_opcode_h='Include/internal/pycore_opcode.h'):
 
-    _opcode_metadata = get_python_module_dict(_opcode_metadata_py)
-
     opcode = get_python_module_dict(opcode_py)
-    opmap = opcode['opmap']
-    opname = opcode['opname']
-
-    MIN_INSTRUMENTED_OPCODE = opcode["MIN_INSTRUMENTED_OPCODE"]
-
-    NUM_OPCODES = len(opname)
-    used = [ False ] * len(opname)
-    next_op = 1
-
-    for name, op in opmap.items():
-        used[op] = True
-
-    specialized_opmap = {}
-    opname_including_specialized = opname.copy()
-    for name in _opcode_metadata['_specialized_instructions']:
-        while used[next_op]:
-            next_op += 1
-        specialized_opmap[name] = next_op
-        opname_including_specialized[next_op] = name
-        used[next_op] = True
-
-    with open(opcode_ids_h, 'w') as fobj:
-        fobj.write(opcode_ids_h_header)
-
-        for name in opname:
-            if name in opmap:
-                op = opmap[name]
-                if op == MIN_INSTRUMENTED_OPCODE:
-                    fobj.write(DEFINE.format("MIN_INSTRUMENTED_OPCODE", MIN_INSTRUMENTED_OPCODE))
-
-                fobj.write(DEFINE.format(name, op))
-
-
-        for name, op in specialized_opmap.items():
-            fobj.write(DEFINE.format(name, op))
-
-        fobj.write(opcode_ids_h_footer)
 
     with open(opcode_h, 'w') as fobj:
         fobj.write(opcode_h_header)
@@ -143,7 +80,6 @@ def main(opcode_py,
         iobj.write(internal_header)
 
         iobj.write("\nextern const uint8_t _PyOpcode_Caches[256];\n")
-        iobj.write("\nextern const uint8_t _PyOpcode_Deopt[256];\n")
         iobj.write("\n#ifdef NEED_OPCODE_TABLES\n")
 
         iobj.write("\nconst uint8_t _PyOpcode_Caches[256] = {\n")
@@ -151,52 +87,12 @@ def main(opcode_py,
             iobj.write(f"    [{name}] = {entries},\n")
         iobj.write("};\n")
 
-        deoptcodes = {}
-        for basic, op in opmap.items():
-            if op < 256:
-                deoptcodes[basic] = basic
-        for basic, family in _opcode_metadata["_specializations"].items():
-            for specialized in family:
-                deoptcodes[specialized] = basic
-        iobj.write("\nconst uint8_t _PyOpcode_Deopt[256] = {\n")
-        for opt, deopt in sorted(deoptcodes.items()):
-            iobj.write(f"    [{opt}] = {deopt},\n")
-        iobj.write("};\n")
         iobj.write("#endif   // NEED_OPCODE_TABLES\n")
 
-        iobj.write("\n")
-        iobj.write(f"\nextern const char *const _PyOpcode_OpName[{NUM_OPCODES}];\n")
-        iobj.write("\n#ifdef NEED_OPCODE_TABLES\n")
-        iobj.write(f"const char *const _PyOpcode_OpName[{NUM_OPCODES}] = {{\n")
-        for op, name in enumerate(opname_including_specialized):
-            if name[0] != "<":
-                op = name
-            iobj.write(f'''    [{op}] = "{name}",\n''')
-        iobj.write("};\n")
-        iobj.write("#endif   // NEED_OPCODE_TABLES\n")
-
-        iobj.write("\n")
-        iobj.write("#define EXTRA_CASES \\\n")
-        for i, flag in enumerate(used):
-            if not flag:
-                iobj.write(f"    case {i}: \\\n")
-        iobj.write("        ;\n")
-
         iobj.write(internal_footer)
 
-    with open(opcode_targets_h, "w") as f:
-        targets = ["_unknown_opcode"] * 256
-        for op, name in enumerate(opname_including_specialized):
-            if op < 256 and not name.startswith("<"):
-                targets[op] = f"TARGET_{name}"
-
-        f.write("static void *opcode_targets[256] = {\n")
-        f.write(",\n".join([f"    &&{s}" for s in targets]))
-        f.write("\n};\n")
-
     print(f"{opcode_h} regenerated from {opcode_py}")
 
 
 if __name__ == '__main__':
-    main(sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4],
-         sys.argv[5], sys.argv[6])
+    main(sys.argv[1], sys.argv[2], sys.argv[3])