Issue #18722: Remove uses of the "register" keyword in C code.
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 056ac36..3a2906c 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -74,7 +74,7 @@
 PyObject *
 PyBytes_FromStringAndSize(const char *str, Py_ssize_t size)
 {
-    register PyBytesObject *op;
+    PyBytesObject *op;
     if (size < 0) {
         PyErr_SetString(PyExc_SystemError,
             "Negative size passed to PyBytes_FromStringAndSize");
@@ -126,8 +126,8 @@
 PyObject *
 PyBytes_FromString(const char *str)
 {
-    register size_t size;
-    register PyBytesObject *op;
+    size_t size;
+    PyBytesObject *op;
 
     assert(str != NULL);
     size = strlen(str);
@@ -513,7 +513,7 @@
 /* object api */
 
 Py_ssize_t
-PyBytes_Size(register PyObject *op)
+PyBytes_Size(PyObject *op)
 {
     if (!PyBytes_Check(op)) {
         PyErr_Format(PyExc_TypeError,
@@ -524,7 +524,7 @@
 }
 
 char *
-PyBytes_AsString(register PyObject *op)
+PyBytes_AsString(PyObject *op)
 {
     if (!PyBytes_Check(op)) {
         PyErr_Format(PyExc_TypeError,
@@ -535,9 +535,9 @@
 }
 
 int
-PyBytes_AsStringAndSize(register PyObject *obj,
-                         register char **s,
-                         register Py_ssize_t *len)
+PyBytes_AsStringAndSize(PyObject *obj,
+                         char **s,
+                         Py_ssize_t *len)
 {
     if (s == NULL) {
         PyErr_BadInternalCall();
@@ -579,7 +579,7 @@
 PyObject *
 PyBytes_Repr(PyObject *obj, int smartquotes)
 {
-    register PyBytesObject* op = (PyBytesObject*) obj;
+    PyBytesObject* op = (PyBytesObject*) obj;
     Py_ssize_t i, length = Py_SIZE(op);
     size_t newsize, squotes, dquotes;
     PyObject *v;
@@ -718,12 +718,12 @@
 }
 
 static PyObject *
-bytes_repeat(register PyBytesObject *a, register Py_ssize_t n)
+bytes_repeat(PyBytesObject *a, Py_ssize_t n)
 {
-    register Py_ssize_t i;
-    register Py_ssize_t j;
-    register Py_ssize_t size;
-    register PyBytesObject *op;
+    Py_ssize_t i;
+    Py_ssize_t j;
+    Py_ssize_t size;
+    PyBytesObject *op;
     size_t nbytes;
     if (n < 0)
         n = 0;
@@ -793,7 +793,7 @@
 }
 
 static PyObject *
-bytes_item(PyBytesObject *a, register Py_ssize_t i)
+bytes_item(PyBytesObject *a, Py_ssize_t i)
 {
     if (i < 0 || i >= Py_SIZE(a)) {
         PyErr_SetString(PyExc_IndexError, "index out of range");
@@ -1461,9 +1461,9 @@
 static PyObject *
 bytes_translate(PyBytesObject *self, PyObject *args)
 {
-    register char *input, *output;
+    char *input, *output;
     const char *table;
-    register Py_ssize_t i, c, changed = 0;
+    Py_ssize_t i, c, changed = 0;
     PyObject *input_obj = (PyObject*)self;
     const char *output_start, *del_table=NULL;
     Py_ssize_t inlen, tablen, dellen = 0;
@@ -2748,9 +2748,9 @@
 };
 
 void
-PyBytes_Concat(register PyObject **pv, register PyObject *w)
+PyBytes_Concat(PyObject **pv, PyObject *w)
 {
-    register PyObject *v;
+    PyObject *v;
     assert(pv != NULL);
     if (*pv == NULL)
         return;
@@ -2764,7 +2764,7 @@
 }
 
 void
-PyBytes_ConcatAndDel(register PyObject **pv, register PyObject *w)
+PyBytes_ConcatAndDel(PyObject **pv, PyObject *w)
 {
     PyBytes_Concat(pv, w);
     Py_XDECREF(w);
@@ -2788,8 +2788,8 @@
 int
 _PyBytes_Resize(PyObject **pv, Py_ssize_t newsize)
 {
-    register PyObject *v;
-    register PyBytesObject *sv;
+    PyObject *v;
+    PyBytesObject *sv;
     v = *pv;
     if (!PyBytes_Check(v) || Py_REFCNT(v) != 1 || newsize < 0) {
         *pv = 0;