Issue #27140: Added BUILD_CONST_KEY_MAP opcode.

1 files changed, 33 insertions, 0 deletions

diff --git a/Python/ceval.c b/Python/ceval.c
index b6ce67c..1d3bc90 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2647,6 +2647,39 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
             DISPATCH();
         }
 
+        TARGET(BUILD_CONST_KEY_MAP) {
+            int i;
+            PyObject *map;
+            PyObject *keys = TOP();
+            if (!PyTuple_CheckExact(keys) ||
+                PyTuple_GET_SIZE(keys) != (Py_ssize_t)oparg) {
+                PyErr_SetString(PyExc_SystemError,
+                                "bad BUILD_CONST_KEY_MAP keys argument");
+                goto error;
+            }
+            map = _PyDict_NewPresized((Py_ssize_t)oparg);
+            if (map == NULL) {
+                goto error;
+            }
+            for (i = oparg; i > 0; i--) {
+                int err;
+                PyObject *key = PyTuple_GET_ITEM(keys, oparg - i);
+                PyObject *value = PEEK(i + 1);
+                err = PyDict_SetItem(map, key, value);
+                if (err != 0) {
+                    Py_DECREF(map);
+                    goto error;
+                }
+            }
+
+            Py_DECREF(POP());
+            while (oparg--) {
+                Py_DECREF(POP());
+            }
+            PUSH(map);
+            DISPATCH();
+        }
+
         TARGET(BUILD_MAP_UNPACK_WITH_CALL)
         TARGET(BUILD_MAP_UNPACK) {
             int with_call = opcode == BUILD_MAP_UNPACK_WITH_CALL;