gh-105481: opcode.h is no longer generated during the build

Lib/opcode.py

@@ -44,39 +44,10 @@
 
     _intrinsic_1_descs = _opcode.get_intrinsic1_descs()
     _intrinsic_2_descs = _opcode.get_intrinsic2_descs()
+    _nb_ops = _opcode.get_nb_ops()
 
     hascompare = [opmap["COMPARE_OP"]]
 
-_nb_ops = [
-    ("NB_ADD", "+"),
-    ("NB_AND", "&"),
-    ("NB_FLOOR_DIVIDE", "//"),
-    ("NB_LSHIFT", "<<"),
-    ("NB_MATRIX_MULTIPLY", "@"),
-    ("NB_MULTIPLY", "*"),
-    ("NB_REMAINDER", "%"),
-    ("NB_OR", "|"),
-    ("NB_POWER", "**"),
-    ("NB_RSHIFT", ">>"),
-    ("NB_SUBTRACT", "-"),
-    ("NB_TRUE_DIVIDE", "/"),
-    ("NB_XOR", "^"),
-    ("NB_INPLACE_ADD", "+="),
-    ("NB_INPLACE_AND", "&="),
-    ("NB_INPLACE_FLOOR_DIVIDE", "//="),
-    ("NB_INPLACE_LSHIFT", "<<="),
-    ("NB_INPLACE_MATRIX_MULTIPLY", "@="),
-    ("NB_INPLACE_MULTIPLY", "*="),
-    ("NB_INPLACE_REMAINDER", "%="),
-    ("NB_INPLACE_OR", "|="),
-    ("NB_INPLACE_POWER", "**="),
-    ("NB_INPLACE_RSHIFT", ">>="),
-    ("NB_INPLACE_SUBTRACT", "-="),
-    ("NB_INPLACE_TRUE_DIVIDE", "/="),
-    ("NB_INPLACE_XOR", "^="),
-]
-
-
 _cache_format = {
     "LOAD_GLOBAL": {
         "counter": 1,

Makefile.pre.in

@@ -1427,13 +1427,11 @@ regen-ast:
 
 .PHONY: regen-opcode
 regen-opcode:
-	# Regenerate Include/opcode.h from Lib/opcode.py
+	# Regenerate Include/internal/pycore_opcode.h from Lib/opcode.py
 	# using Tools/build/generate_opcode_h.py
 	$(PYTHON_FOR_REGEN) $(srcdir)/Tools/build/generate_opcode_h.py \
 		$(srcdir)/Lib/opcode.py \
-		$(srcdir)/Include/opcode.h.new \
 		$(srcdir)/Include/internal/pycore_opcode.h.new
-	$(UPDATE_FILE) $(srcdir)/Include/opcode.h $(srcdir)/Include/opcode.h.new
 	$(UPDATE_FILE) $(srcdir)/Include/internal/pycore_opcode.h $(srcdir)/Include/internal/pycore_opcode.h.new
 
 .PHONY: regen-token

Modules/_opcode.c

@@ -223,6 +223,75 @@ _opcode_get_specialization_stats_impl(PyObject *module)
 
 /*[clinic input]
 
+_opcode.get_nb_ops
+
+Return array of symbols of binary ops.
+
+Indexed by the BINARY_OP oparg value.
+[clinic start generated code]*/
+
+static PyObject *
+_opcode_get_nb_ops_impl(PyObject *module)
+/*[clinic end generated code: output=d997d306cc15426f input=9462fc544c823176]*/
+{
+    PyObject *list = PyList_New(NB_OPARG_LAST + 1);
+    if (list == NULL) {
+        return NULL;
+    }
+#define ADD_NB_OP(NUM, STR) \
+    do { \
+        PyObject *pair = Py_BuildValue( \
+            "NN", PyUnicode_FromString(#NUM), PyUnicode_FromString(STR)); \
+        if (pair == NULL) { \
+            Py_DECREF(list); \
+            return NULL; \
+        } \
+        PyList_SET_ITEM(list, (NUM), pair); \
+    } while(0);
+
+    ADD_NB_OP(NB_ADD, "+");
+    ADD_NB_OP(NB_AND, "&");
+    ADD_NB_OP(NB_FLOOR_DIVIDE, "//");
+    ADD_NB_OP(NB_LSHIFT, "<<");
+    ADD_NB_OP(NB_MATRIX_MULTIPLY, "@");
+    ADD_NB_OP(NB_MULTIPLY, "*");
+    ADD_NB_OP(NB_REMAINDER, "%");
+    ADD_NB_OP(NB_OR, "|");
+    ADD_NB_OP(NB_POWER, "**");
+    ADD_NB_OP(NB_RSHIFT, ">>");
+    ADD_NB_OP(NB_SUBTRACT, "-");
+    ADD_NB_OP(NB_TRUE_DIVIDE, "/");
+    ADD_NB_OP(NB_XOR, "^");
+    ADD_NB_OP(NB_INPLACE_ADD, "+=");
+    ADD_NB_OP(NB_INPLACE_AND, "&=");
+    ADD_NB_OP(NB_INPLACE_FLOOR_DIVIDE, "//=");
+    ADD_NB_OP(NB_INPLACE_LSHIFT, "<<=");
+    ADD_NB_OP(NB_INPLACE_MATRIX_MULTIPLY, "@=");
+    ADD_NB_OP(NB_INPLACE_MULTIPLY, "*=");
+    ADD_NB_OP(NB_INPLACE_REMAINDER, "%=");
+    ADD_NB_OP(NB_INPLACE_OR, "|=");
+    ADD_NB_OP(NB_INPLACE_POWER, "**=");
+    ADD_NB_OP(NB_INPLACE_RSHIFT, ">>=");
+    ADD_NB_OP(NB_INPLACE_SUBTRACT, "-=");
+    ADD_NB_OP(NB_INPLACE_TRUE_DIVIDE, "/=");
+    ADD_NB_OP(NB_INPLACE_XOR, "^=");
+
+#undef ADD_NB_OP
+
+    for(int i = 0; i <= NB_OPARG_LAST; i++) {
+        if (PyList_GET_ITEM(list, i) == NULL) {
+            Py_DECREF(list);
+            PyErr_Format(PyExc_ValueError,
+                         "Missing initialization for NB_OP %d",
+                         i);
+            return NULL;
+        }
+    }
+    return list;
+}
+
+/*[clinic input]
+
 _opcode.get_intrinsic1_descs
 
 Return a list of names of the unary intrinsics.
@@ -287,6 +356,7 @@ opcode_functions[] =  {
     _OPCODE_HAS_LOCAL_METHODDEF
     _OPCODE_HAS_EXC_METHODDEF
     _OPCODE_GET_SPECIALIZATION_STATS_METHODDEF
+    _OPCODE_GET_NB_OPS_METHODDEF
     _OPCODE_GET_INTRINSIC1_DESCS_METHODDEF
     _OPCODE_GET_INTRINSIC2_DESCS_METHODDEF
     {NULL, NULL, 0, NULL}

PCbuild/regen.targets

@@ -14,7 +14,7 @@
       <Argument>-C</Argument>
     </_ASTOutputs>
     <_OpcodeSources Include="$(PySourcePath)Tools\build\generate_opcode_h.py;$(PySourcePath)Lib\opcode.py" />
-    <_OpcodeOutputs Include="$(PySourcePath)Include\opcode.h;$(PySourcePath)Include\internal\pycore_opcode.h" />
+    <_OpcodeOutputs Include="$(PySourcePath)Include\internal\pycore_opcode.h" />
     <_TokenSources Include="$(PySourcePath)Grammar\Tokens" />
     <_TokenOutputs Include="$(PySourcePath)Doc\library\token-list.inc">
       <Format>rst</Format>
@@ -59,7 +59,7 @@
           Inputs="@(_OpcodeSources)" Outputs="@(_OpcodeOutputs)"
           DependsOnTargets="FindPythonForBuild">
     <Message Text="Regenerate @(_OpcodeOutputs->'%(Filename)%(Extension)',' ')" Importance="high" />
-    <Exec Command="$(PythonForBuild) Tools\build\generate_opcode_h.py Lib\opcode.py Include\opcode.h Include\internal\pycore_opcode.h Include\internal\pycore_intrinsics.h"
+    <Exec Command="$(PythonForBuild) Tools\build\generate_opcode_h.py Lib\opcode.py Include\internal\pycore_opcode.h Include\internal\pycore_intrinsics.h"
           WorkingDirectory="$(PySourcePath)" />
   </Target>
 

Tools/build/generate_opcode_h.py

@@ -1,32 +1,11 @@
-# This script generates the opcode.h header file.
+# This script generates the pycore_opcode.h header file.
 
 import sys
 import tokenize
 
 SCRIPT_NAME = "Tools/build/generate_opcode_h.py"
 PYTHON_OPCODE = "Lib/opcode.py"
 
-opcode_h_header = f"""
-// Auto-generated by {SCRIPT_NAME} from {PYTHON_OPCODE}
-
-#ifndef Py_OPCODE_H
-#define Py_OPCODE_H
-#ifdef __cplusplus
-extern "C" {{
-#endif
-
-#include "opcode_ids.h"
-
-""".lstrip()
-
-opcode_h_footer = """
-
-#ifdef __cplusplus
-}
-#endif
-#endif /* !Py_OPCODE_H */
-"""
-
 internal_header = f"""
 // Auto-generated by {SCRIPT_NAME} from {PYTHON_OPCODE}
 
@@ -62,20 +41,10 @@ def get_python_module_dict(filename):
     return mod
 
 def main(opcode_py,
-         opcode_h='Include/opcode.h',
          internal_opcode_h='Include/internal/pycore_opcode.h'):
 
     opcode = get_python_module_dict(opcode_py)
 
-    with open(opcode_h, 'w') as fobj:
-        fobj.write(opcode_h_header)
-
-        fobj.write("\n")
-        for i, (op, _) in enumerate(opcode["_nb_ops"]):
-            fobj.write(DEFINE.format(op, i))
-
-        fobj.write(opcode_h_footer)
-
     with open(internal_opcode_h, 'w') as iobj:
         iobj.write(internal_header)
 
@@ -91,8 +60,8 @@ def main(opcode_py,
 
         iobj.write(internal_footer)
 
-    print(f"{opcode_h} regenerated from {opcode_py}")
+    print(f"{internal_opcode_h} regenerated from {opcode_py}")
 
 
 if __name__ == '__main__':
-    main(sys.argv[1], sys.argv[2], sys.argv[3])
+    main(sys.argv[1], sys.argv[2])