diff --git a/ChangeLog b/ChangeLog
index f102bcc62e..52299e6c56 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+2018-10-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+	regex: __builtin_expect → __glibc_unlikely
+	[BZ#23744]
+	This refactoring was prompted by a problem when the regex code is
+	used as part of Gnulib and when the builder’s compiler does not grok
+	__builtin_expect.  Problem reported for Gawk by Nelson H.F. Beebe in:
+	https://lists.gnu.org/r/bug-gnulib/2018-09/msg00137.html
+	Although this refactoring does not fix the problem directly,
+	we might as well have Gawk use the now-preferred glibc style for when
+	__builtin_expect is unavailable.
+	* posix/regex_internal.h (BE): Remove.
+	All uses replaced by __glibc_unlikely or __glibc_likely.
+
 2018-10-11  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
diff --git a/posix/regcomp.c b/posix/regcomp.c
index e81652f229..3ede12bfc2 100644
--- a/posix/regcomp.c
+++ b/posix/regcomp.c
@@ -476,7 +476,7 @@ regcomp (regex_t *_Restrict_ preg, const char *_Restrict_ pattern, int cflags)
 
   /* Try to allocate space for the fastmap.  */
   preg->fastmap = re_malloc (char, SBC_MAX);
-  if (BE (preg->fastmap == NULL, 0))
+  if (__glibc_unlikely (preg->fastmap == NULL))
     return REG_ESPACE;
 
   syntax |= (cflags & REG_ICASE) ? RE_ICASE : 0;
@@ -502,7 +502,7 @@ regcomp (regex_t *_Restrict_ preg, const char *_Restrict_ pattern, int cflags)
     ret = REG_EPAREN;
 
   /* We have already checked preg->fastmap != NULL.  */
-  if (BE (ret == REG_NOERROR, 1))
+  if (__glibc_likely (ret == REG_NOERROR))
     /* Compute the fastmap now, since regexec cannot modify the pattern
        buffer.  This function never fails in this implementation.  */
     (void) re_compile_fastmap (preg);
@@ -529,10 +529,9 @@ regerror (int errcode, const regex_t *_Restrict_ preg, char *_Restrict_ errbuf,
 {
   const char *msg;
   size_t msg_size;
+  int nerrcodes = sizeof __re_error_msgid_idx / sizeof __re_error_msgid_idx[0];
 
-  if (BE (errcode < 0
-	  || errcode >= (int) (sizeof (__re_error_msgid_idx)
-			       / sizeof (__re_error_msgid_idx[0])), 0))
+  if (__glibc_unlikely (errcode < 0 || errcode >= nerrcodes))
     /* Only error codes returned by the rest of the code should be passed
        to this routine.  If we are given anything else, or if other regex
        code generates an invalid error code, then the program has a bug.
@@ -543,10 +542,10 @@ regerror (int errcode, const regex_t *_Restrict_ preg, char *_Restrict_ errbuf,
 
   msg_size = strlen (msg) + 1; /* Includes the null.  */
 
-  if (BE (errbuf_size != 0, 1))
+  if (__glibc_likely (errbuf_size != 0))
     {
       size_t cpy_size = msg_size;
-      if (BE (msg_size > errbuf_size, 0))
+      if (__glibc_unlikely (msg_size > errbuf_size))
 	{
 	  cpy_size = errbuf_size - 1;
 	  errbuf[cpy_size] = '\0';
@@ -644,7 +643,7 @@ void
 regfree (regex_t *preg)
 {
   re_dfa_t *dfa = preg->buffer;
-  if (BE (dfa != NULL, 1))
+  if (__glibc_likely (dfa != NULL))
     {
       lock_fini (dfa->lock);
       free_dfa_content (dfa);
@@ -754,7 +753,7 @@ re_compile_internal (regex_t *preg, const char * pattern, size_t length,
 
   /* Initialize the dfa.  */
   dfa = preg->buffer;
-  if (BE (preg->allocated < sizeof (re_dfa_t), 0))
+  if (__glibc_unlikely (preg->allocated < sizeof (re_dfa_t)))
     {
       /* If zero allocated, but buffer is non-null, try to realloc
 	 enough space.  This loses if buffer's address is bogus, but
@@ -769,9 +768,9 @@ re_compile_internal (regex_t *preg, const char * pattern, size_t length,
   preg->used = sizeof (re_dfa_t);
 
   err = init_dfa (dfa, length);
-  if (BE (err == REG_NOERROR && lock_init (dfa->lock) != 0, 0))
+  if (__glibc_unlikely (err == REG_NOERROR && lock_init (dfa->lock) != 0))
     err = REG_ESPACE;
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     {
       free_dfa_content (dfa);
       preg->buffer = NULL;
@@ -786,7 +785,7 @@ re_compile_internal (regex_t *preg, const char * pattern, size_t length,
 
   err = re_string_construct (&regexp, pattern, length, preg->translate,
 			     (syntax & RE_ICASE) != 0, dfa);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     {
     re_compile_internal_free_return:
       free_workarea_compile (preg);
@@ -801,12 +800,12 @@ re_compile_internal (regex_t *preg, const char * pattern, size_t length,
   /* Parse the regular expression, and build a structure tree.  */
   preg->re_nsub = 0;
   dfa->str_tree = parse (&regexp, preg, syntax, &err);
-  if (BE (dfa->str_tree == NULL, 0))
+  if (__glibc_unlikely (dfa->str_tree == NULL))
     goto re_compile_internal_free_return;
 
   /* Analyze the tree and create the nfa.  */
   err = analyze (preg);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     goto re_compile_internal_free_return;
 
 #ifdef RE_ENABLE_I18N
@@ -822,7 +821,7 @@ re_compile_internal (regex_t *preg, const char * pattern, size_t length,
   free_workarea_compile (preg);
   re_string_destruct (&regexp);
 
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     {
       lock_fini (dfa->lock);
       free_dfa_content (dfa);
@@ -864,7 +863,8 @@ init_dfa (re_dfa_t *dfa, size_t pat_len)
      calculation below, and for similar doubling calculations
      elsewhere.  And it's <= rather than <, because some of the
      doubling calculations add 1 afterwards.  */
-  if (BE (MIN (IDX_MAX, SIZE_MAX / max_object_size) / 2 <= pat_len, 0))
+  if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size) / 2
+			<= pat_len))
     return REG_ESPACE;
 
   dfa->nodes_alloc = pat_len + 1;
@@ -908,7 +908,7 @@ init_dfa (re_dfa_t *dfa, size_t pat_len)
 	  int i, j, ch;
 
 	  dfa->sb_char = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
-	  if (BE (dfa->sb_char == NULL, 0))
+	  if (__glibc_unlikely (dfa->sb_char == NULL))
 	    return REG_ESPACE;
 
 	  /* Set the bits corresponding to single byte chars.  */
@@ -927,7 +927,7 @@ init_dfa (re_dfa_t *dfa, size_t pat_len)
     }
 #endif
 
-  if (BE (dfa->nodes == NULL || dfa->state_table == NULL, 0))
+  if (__glibc_unlikely (dfa->nodes == NULL || dfa->state_table == NULL))
     return REG_ESPACE;
   return REG_NOERROR;
 }
@@ -943,7 +943,7 @@ init_word_char (re_dfa_t *dfa)
   int j;
   int ch = 0;
   dfa->word_ops_used = 1;
-  if (BE (dfa->map_notascii == 0, 1))
+  if (__glibc_likely (dfa->map_notascii == 0))
     {
       /* Avoid uint32_t and uint64_t as some non-GCC platforms lack
 	 them, an issue when this code is used in Gnulib.  */
@@ -970,7 +970,7 @@ init_word_char (re_dfa_t *dfa)
         goto general_case;
       ch = 128;
 
-      if (BE (dfa->is_utf8, 1))
+      if (__glibc_likely (dfa->is_utf8))
 	{
 	  memset (&dfa->word_char[i], '\0', (SBC_MAX - ch) / 8);
 	  return;
@@ -1017,7 +1017,7 @@ create_initial_state (re_dfa_t *dfa)
   first = dfa->str_tree->first->node_idx;
   dfa->init_node = first;
   err = re_node_set_init_copy (&init_nodes, dfa->eclosures + first);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     return err;
 
   /* The back-references which are in initial states can epsilon transit,
@@ -1061,7 +1061,7 @@ create_initial_state (re_dfa_t *dfa)
   /* It must be the first time to invoke acquire_state.  */
   dfa->init_state = re_acquire_state_context (&err, dfa, &init_nodes, 0);
   /* We don't check ERR here, since the initial state must not be NULL.  */
-  if (BE (dfa->init_state == NULL, 0))
+  if (__glibc_unlikely (dfa->init_state == NULL))
     return err;
   if (dfa->init_state->has_constraint)
     {
@@ -1073,8 +1073,9 @@ create_initial_state (re_dfa_t *dfa)
 							 &init_nodes,
 							 CONTEXT_NEWLINE
 							 | CONTEXT_BEGBUF);
-      if (BE (dfa->init_state_word == NULL || dfa->init_state_nl == NULL
-	      || dfa->init_state_begbuf == NULL, 0))
+      if (__glibc_unlikely (dfa->init_state_word == NULL
+			    || dfa->init_state_nl == NULL
+			    || dfa->init_state_begbuf == NULL))
 	return err;
     }
   else
@@ -1181,8 +1182,8 @@ analyze (regex_t *preg)
   dfa->org_indices = re_malloc (Idx, dfa->nodes_alloc);
   dfa->edests = re_malloc (re_node_set, dfa->nodes_alloc);
   dfa->eclosures = re_malloc (re_node_set, dfa->nodes_alloc);
-  if (BE (dfa->nexts == NULL || dfa->org_indices == NULL || dfa->edests == NULL
-	  || dfa->eclosures == NULL, 0))
+  if (__glibc_unlikely (dfa->nexts == NULL || dfa->org_indices == NULL
+			|| dfa->edests == NULL || dfa->eclosures == NULL))
     return REG_ESPACE;
 
   dfa->subexp_map = re_malloc (Idx, preg->re_nsub);
@@ -1203,17 +1204,17 @@ analyze (regex_t *preg)
     }
 
   ret = postorder (dfa->str_tree, lower_subexps, preg);
-  if (BE (ret != REG_NOERROR, 0))
+  if (__glibc_unlikely (ret != REG_NOERROR))
     return ret;
   ret = postorder (dfa->str_tree, calc_first, dfa);
-  if (BE (ret != REG_NOERROR, 0))
+  if (__glibc_unlikely (ret != REG_NOERROR))
     return ret;
   preorder (dfa->str_tree, calc_next, dfa);
   ret = preorder (dfa->str_tree, link_nfa_nodes, dfa);
-  if (BE (ret != REG_NOERROR, 0))
+  if (__glibc_unlikely (ret != REG_NOERROR))
     return ret;
   ret = calc_eclosure (dfa);
-  if (BE (ret != REG_NOERROR, 0))
+  if (__glibc_unlikely (ret != REG_NOERROR))
     return ret;
 
   /* We only need this during the prune_impossible_nodes pass in regexec.c;
@@ -1222,7 +1223,7 @@ analyze (regex_t *preg)
       || dfa->nbackref)
     {
       dfa->inveclosures = re_malloc (re_node_set, dfa->nodes_len);
-      if (BE (dfa->inveclosures == NULL, 0))
+      if (__glibc_unlikely (dfa->inveclosures == NULL))
 	return REG_ESPACE;
       ret = calc_inveclosure (dfa);
     }
@@ -1252,7 +1253,7 @@ postorder (bin_tree_t *root, reg_errcode_t (fn (void *, bin_tree_t *)),
       do
 	{
 	  reg_errcode_t err = fn (extra, node);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 	  if (node->parent == NULL)
 	    return REG_NOERROR;
@@ -1274,7 +1275,7 @@ preorder (bin_tree_t *root, reg_errcode_t (fn (void *, bin_tree_t *)),
   for (node = root; ; )
     {
       reg_errcode_t err = fn (extra, node);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return err;
 
       /* Go to the left node, or up and to the right.  */
@@ -1375,7 +1376,8 @@ lower_subexp (reg_errcode_t *err, regex_t *preg, bin_tree_t *node)
   cls = create_tree (dfa, NULL, NULL, OP_CLOSE_SUBEXP);
   tree1 = body ? create_tree (dfa, body, cls, CONCAT) : cls;
   tree = create_tree (dfa, op, tree1, CONCAT);
-  if (BE (tree == NULL || tree1 == NULL || op == NULL || cls == NULL, 0))
+  if (__glibc_unlikely (tree == NULL || tree1 == NULL
+			|| op == NULL || cls == NULL))
     {
       *err = REG_ESPACE;
       return NULL;
@@ -1401,7 +1403,7 @@ calc_first (void *extra, bin_tree_t *node)
     {
       node->first = node;
       node->node_idx = re_dfa_add_node (dfa, node->token);
-      if (BE (node->node_idx == -1, 0))
+      if (__glibc_unlikely (node->node_idx == -1))
 	return REG_ESPACE;
       if (node->token.type == ANCHOR)
 	dfa->nodes[node->node_idx].constraint = node->token.opr.ctx_type;
@@ -1512,11 +1514,11 @@ duplicate_node_closure (re_dfa_t *dfa, Idx top_org_node, Idx top_clone_node,
 	  org_dest = dfa->nexts[org_node];
 	  re_node_set_empty (dfa->edests + clone_node);
 	  clone_dest = duplicate_node (dfa, org_dest, constraint);
-	  if (BE (clone_dest == -1, 0))
+	  if (__glibc_unlikely (clone_dest == -1))
 	    return REG_ESPACE;
 	  dfa->nexts[clone_node] = dfa->nexts[org_node];
 	  ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
-	  if (BE (! ok, 0))
+	  if (__glibc_unlikely (! ok))
 	    return REG_ESPACE;
 	}
       else if (dfa->edests[org_node].nelem == 0)
@@ -1538,17 +1540,17 @@ duplicate_node_closure (re_dfa_t *dfa, Idx top_org_node, Idx top_clone_node,
 	  if (org_node == root_node && clone_node != org_node)
 	    {
 	      ok = re_node_set_insert (dfa->edests + clone_node, org_dest);
-	      if (BE (! ok, 0))
+	      if (__glibc_unlikely (! ok))
 	        return REG_ESPACE;
 	      break;
 	    }
 	  /* In case the node has another constraint, append it.  */
 	  constraint |= dfa->nodes[org_node].constraint;
 	  clone_dest = duplicate_node (dfa, org_dest, constraint);
-	  if (BE (clone_dest == -1, 0))
+	  if (__glibc_unlikely (clone_dest == -1))
 	    return REG_ESPACE;
 	  ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
-	  if (BE (! ok, 0))
+	  if (__glibc_unlikely (! ok))
 	    return REG_ESPACE;
 	}
       else /* dfa->edests[org_node].nelem == 2 */
@@ -1564,14 +1566,14 @@ duplicate_node_closure (re_dfa_t *dfa, Idx top_org_node, Idx top_clone_node,
 	      /* There is no such duplicated node, create a new one.  */
 	      reg_errcode_t err;
 	      clone_dest = duplicate_node (dfa, org_dest, constraint);
-	      if (BE (clone_dest == -1, 0))
+	      if (__glibc_unlikely (clone_dest == -1))
 		return REG_ESPACE;
 	      ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
-	      if (BE (! ok, 0))
+	      if (__glibc_unlikely (! ok))
 		return REG_ESPACE;
 	      err = duplicate_node_closure (dfa, org_dest, clone_dest,
 					    root_node, constraint);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		return err;
 	    }
 	  else
@@ -1579,16 +1581,16 @@ duplicate_node_closure (re_dfa_t *dfa, Idx top_org_node, Idx top_clone_node,
 	      /* There is a duplicated node which satisfies the constraint,
 		 use it to avoid infinite loop.  */
 	      ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
-	      if (BE (! ok, 0))
+	      if (__glibc_unlikely (! ok))
 		return REG_ESPACE;
 	    }
 
 	  org_dest = dfa->edests[org_node].elems[1];
 	  clone_dest = duplicate_node (dfa, org_dest, constraint);
-	  if (BE (clone_dest == -1, 0))
+	  if (__glibc_unlikely (clone_dest == -1))
 	    return REG_ESPACE;
 	  ok = re_node_set_insert (dfa->edests + clone_node, clone_dest);
-	  if (BE (! ok, 0))
+	  if (__glibc_unlikely (! ok))
 	    return REG_ESPACE;
 	}
       org_node = org_dest;
@@ -1622,7 +1624,7 @@ static Idx
 duplicate_node (re_dfa_t *dfa, Idx org_idx, unsigned int constraint)
 {
   Idx dup_idx = re_dfa_add_node (dfa, dfa->nodes[org_idx]);
-  if (BE (dup_idx != -1, 1))
+  if (__glibc_likely (dup_idx != -1))
     {
       dfa->nodes[dup_idx].constraint = constraint;
       dfa->nodes[dup_idx].constraint |= dfa->nodes[org_idx].constraint;
@@ -1648,7 +1650,7 @@ calc_inveclosure (re_dfa_t *dfa)
       for (idx = 0; idx < dfa->eclosures[src].nelem; ++idx)
 	{
 	  ok = re_node_set_insert_last (dfa->inveclosures + elems[idx], src);
-	  if (BE (! ok, 0))
+	  if (__glibc_unlikely (! ok))
 	    return REG_ESPACE;
 	}
     }
@@ -1689,7 +1691,7 @@ calc_eclosure (re_dfa_t *dfa)
 	continue;
       /* Calculate epsilon closure of 'node_idx'.  */
       err = calc_eclosure_iter (&eclosure_elem, dfa, node_idx, true);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return err;
 
       if (dfa->eclosures[node_idx].nelem == 0)
@@ -1712,7 +1714,7 @@ calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, Idx node, bool root)
   bool ok;
   bool incomplete = false;
   err = re_node_set_alloc (&eclosure, dfa->edests[node].nelem + 1);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     return err;
 
   /* This indicates that we are calculating this node now.
@@ -1727,7 +1729,7 @@ calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, Idx node, bool root)
     {
       err = duplicate_node_closure (dfa, node, node, node,
 				    dfa->nodes[node].constraint);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return err;
     }
 
@@ -1749,14 +1751,14 @@ calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, Idx node, bool root)
 	if (dfa->eclosures[edest].nelem == 0)
 	  {
 	    err = calc_eclosure_iter (&eclosure_elem, dfa, edest, false);
-	    if (BE (err != REG_NOERROR, 0))
+	    if (__glibc_unlikely (err != REG_NOERROR))
 	      return err;
 	  }
 	else
 	  eclosure_elem = dfa->eclosures[edest];
 	/* Merge the epsilon closure of 'edest'.  */
 	err = re_node_set_merge (&eclosure, &eclosure_elem);
-	if (BE (err != REG_NOERROR, 0))
+	if (__glibc_unlikely (err != REG_NOERROR))
 	  return err;
 	/* If the epsilon closure of 'edest' is incomplete,
 	   the epsilon closure of this node is also incomplete.  */
@@ -1769,7 +1771,7 @@ calc_eclosure_iter (re_node_set *new_set, re_dfa_t *dfa, Idx node, bool root)
 
   /* An epsilon closure includes itself.  */
   ok = re_node_set_insert (&eclosure, node);
-  if (BE (! ok, 0))
+  if (__glibc_unlikely (! ok))
     return REG_ESPACE;
   if (incomplete && !root)
     dfa->eclosures[node].nelem = 0;
@@ -2139,14 +2141,14 @@ parse (re_string_t *regexp, regex_t *preg, reg_syntax_t syntax,
   dfa->syntax = syntax;
   fetch_token (&current_token, regexp, syntax | RE_CARET_ANCHORS_HERE);
   tree = parse_reg_exp (regexp, preg, &current_token, syntax, 0, err);
-  if (BE (*err != REG_NOERROR && tree == NULL, 0))
+  if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
     return NULL;
   eor = create_tree (dfa, NULL, NULL, END_OF_RE);
   if (tree != NULL)
     root = create_tree (dfa, tree, eor, CONCAT);
   else
     root = eor;
-  if (BE (eor == NULL || root == NULL, 0))
+  if (__glibc_unlikely (eor == NULL || root == NULL))
     {
       *err = REG_ESPACE;
       return NULL;
@@ -2171,7 +2173,7 @@ parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token,
   bin_tree_t *tree, *branch = NULL;
   bitset_word_t initial_bkref_map = dfa->completed_bkref_map;
   tree = parse_branch (regexp, preg, token, syntax, nest, err);
-  if (BE (*err != REG_NOERROR && tree == NULL, 0))
+  if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
     return NULL;
 
   while (token->type == OP_ALT)
@@ -2183,7 +2185,7 @@ parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token,
 	  bitset_word_t accumulated_bkref_map = dfa->completed_bkref_map;
 	  dfa->completed_bkref_map = initial_bkref_map;
 	  branch = parse_branch (regexp, preg, token, syntax, nest, err);
-	  if (BE (*err != REG_NOERROR && branch == NULL, 0))
+	  if (__glibc_unlikely (*err != REG_NOERROR && branch == NULL))
 	    {
 	      if (tree != NULL)
 		postorder (tree, free_tree, NULL);
@@ -2194,7 +2196,7 @@ parse_reg_exp (re_string_t *regexp, regex_t *preg, re_token_t *token,
       else
 	branch = NULL;
       tree = create_tree (dfa, tree, branch, OP_ALT);
-      if (BE (tree == NULL, 0))
+      if (__glibc_unlikely (tree == NULL))
 	{
 	  *err = REG_ESPACE;
 	  return NULL;
@@ -2219,14 +2221,14 @@ parse_branch (re_string_t *regexp, regex_t *preg, re_token_t *token,
   bin_tree_t *tree, *expr;
   re_dfa_t *dfa = preg->buffer;
   tree = parse_expression (regexp, preg, token, syntax, nest, err);
-  if (BE (*err != REG_NOERROR && tree == NULL, 0))
+  if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
     return NULL;
 
   while (token->type != OP_ALT && token->type != END_OF_RE
 	 && (nest == 0 || token->type != OP_CLOSE_SUBEXP))
     {
       expr = parse_expression (regexp, preg, token, syntax, nest, err);
-      if (BE (*err != REG_NOERROR && expr == NULL, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR && expr == NULL))
 	{
 	  if (tree != NULL)
 	    postorder (tree, free_tree, NULL);
@@ -2267,7 +2269,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
     {
     case CHARACTER:
       tree = create_token_tree (dfa, NULL, NULL, token);
-      if (BE (tree == NULL, 0))
+      if (__glibc_unlikely (tree == NULL))
 	{
 	  *err = REG_ESPACE;
 	  return NULL;
@@ -2282,7 +2284,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
 	      fetch_token (token, regexp, syntax);
 	      mbc_remain = create_token_tree (dfa, NULL, NULL, token);
 	      tree = create_tree (dfa, tree, mbc_remain, CONCAT);
-	      if (BE (mbc_remain == NULL || tree == NULL, 0))
+	      if (__glibc_unlikely (mbc_remain == NULL || tree == NULL))
 		{
 		  *err = REG_ESPACE;
 		  return NULL;
@@ -2294,25 +2296,25 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
 
     case OP_OPEN_SUBEXP:
       tree = parse_sub_exp (regexp, preg, token, syntax, nest + 1, err);
-      if (BE (*err != REG_NOERROR && tree == NULL, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
 	return NULL;
       break;
 
     case OP_OPEN_BRACKET:
       tree = parse_bracket_exp (regexp, dfa, token, syntax, err);
-      if (BE (*err != REG_NOERROR && tree == NULL, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
 	return NULL;
       break;
 
     case OP_BACK_REF:
-      if (!BE (dfa->completed_bkref_map & (1 << token->opr.idx), 1))
+      if (!__glibc_likely (dfa->completed_bkref_map & (1 << token->opr.idx)))
 	{
 	  *err = REG_ESUBREG;
 	  return NULL;
 	}
       dfa->used_bkref_map |= 1 << token->opr.idx;
       tree = create_token_tree (dfa, NULL, NULL, token);
-      if (BE (tree == NULL, 0))
+      if (__glibc_unlikely (tree == NULL))
 	{
 	  *err = REG_ESPACE;
 	  return NULL;
@@ -2358,7 +2360,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
       /* mb_partial and word_char bits should be initialized already
 	 by peek_token.  */
       tree = create_token_tree (dfa, NULL, NULL, token);
-      if (BE (tree == NULL, 0))
+      if (__glibc_unlikely (tree == NULL))
 	{
 	  *err = REG_ESPACE;
 	  return NULL;
@@ -2388,7 +2390,8 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
 	    }
 	  tree_last = create_token_tree (dfa, NULL, NULL, token);
 	  tree = create_tree (dfa, tree_first, tree_last, OP_ALT);
-	  if (BE (tree_first == NULL || tree_last == NULL || tree == NULL, 0))
+	  if (__glibc_unlikely (tree_first == NULL || tree_last == NULL
+				|| tree == NULL))
 	    {
 	      *err = REG_ESPACE;
 	      return NULL;
@@ -2397,7 +2400,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
       else
 	{
 	  tree = create_token_tree (dfa, NULL, NULL, token);
-	  if (BE (tree == NULL, 0))
+	  if (__glibc_unlikely (tree == NULL))
 	    {
 	      *err = REG_ESPACE;
 	      return NULL;
@@ -2412,7 +2415,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
 
     case OP_PERIOD:
       tree = create_token_tree (dfa, NULL, NULL, token);
-      if (BE (tree == NULL, 0))
+      if (__glibc_unlikely (tree == NULL))
 	{
 	  *err = REG_ESPACE;
 	  return NULL;
@@ -2427,7 +2430,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
 				 "alnum",
 				 "_",
 				 token->type == OP_NOTWORD, err);
-      if (BE (*err != REG_NOERROR && tree == NULL, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
 	return NULL;
       break;
 
@@ -2437,7 +2440,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
 				 "space",
 				 "",
 				 token->type == OP_NOTSPACE, err);
-      if (BE (*err != REG_NOERROR && tree == NULL, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR && tree == NULL))
 	return NULL;
       break;
 
@@ -2463,7 +2466,7 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
     {
       bin_tree_t *dup_tree = parse_dup_op (tree, regexp, dfa, token,
 					   syntax, err);
-      if (BE (*err != REG_NOERROR && dup_tree == NULL, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR && dup_tree == NULL))
 	{
 	  if (tree != NULL)
 	    postorder (tree, free_tree, NULL);
@@ -2509,13 +2512,14 @@ parse_sub_exp (re_string_t *regexp, regex_t *preg, re_token_t *token,
   else
     {
       tree = parse_reg_exp (regexp, preg, token, syntax, nest, err);
-      if (BE (*err == REG_NOERROR && token->type != OP_CLOSE_SUBEXP, 0))
+      if (__glibc_unlikely (*err == REG_NOERROR
+			    && token->type != OP_CLOSE_SUBEXP))
 	{
 	  if (tree != NULL)
 	    postorder (tree, free_tree, NULL);
 	  *err = REG_EPAREN;
 	}
-      if (BE (*err != REG_NOERROR, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR))
 	return NULL;
     }
 
@@ -2523,7 +2527,7 @@ parse_sub_exp (re_string_t *regexp, regex_t *preg, re_token_t *token,
     dfa->completed_bkref_map |= 1 << cur_nsub;
 
   tree = create_tree (dfa, tree, NULL, SUBEXP);
-  if (BE (tree == NULL, 0))
+  if (__glibc_unlikely (tree == NULL))
     {
       *err = REG_ESPACE;
       return NULL;
@@ -2556,17 +2560,17 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
 	      return NULL;
 	    }
 	}
-      if (BE (start != -2, 1))
+      if (__glibc_likely (start != -2))
 	{
 	  /* We treat "{n}" as "{n,n}".  */
 	  end = ((token->type == OP_CLOSE_DUP_NUM) ? start
 		 : ((token->type == CHARACTER && token->opr.c == ',')
 		    ? fetch_number (regexp, token, syntax) : -2));
 	}
-      if (BE (start == -2 || end == -2, 0))
+      if (__glibc_unlikely (start == -2 || end == -2))
 	{
 	  /* Invalid sequence.  */
-	  if (BE (!(syntax & RE_INVALID_INTERVAL_ORD), 0))
+	  if (__glibc_unlikely (!(syntax & RE_INVALID_INTERVAL_ORD)))
 	    {
 	      if (token->type == END_OF_RE)
 		*err = REG_EBRACE;
@@ -2585,15 +2589,15 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
 	  return elem;
 	}
 
-      if (BE ((end != -1 && start > end)
-	      || token->type != OP_CLOSE_DUP_NUM, 0))
+      if (__glibc_unlikely ((end != -1 && start > end)
+			    || token->type != OP_CLOSE_DUP_NUM))
 	{
 	  /* First number greater than second.  */
 	  *err = REG_BADBR;
 	  return NULL;
 	}
 
-      if (BE (RE_DUP_MAX < (end == -1 ? start : end), 0))
+      if (__glibc_unlikely (RE_DUP_MAX < (end == -1 ? start : end)))
 	{
 	  *err = REG_ESIZE;
 	  return NULL;
@@ -2607,23 +2611,23 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
 
   fetch_token (token, regexp, syntax);
 
-  if (BE (elem == NULL, 0))
+  if (__glibc_unlikely (elem == NULL))
     return NULL;
-  if (BE (start == 0 && end == 0, 0))
+  if (__glibc_unlikely (start == 0 && end == 0))
     {
       postorder (elem, free_tree, NULL);
       return NULL;
     }
 
   /* Extract "<re>{n,m}" to "<re><re>...<re><re>{0,<m-n>}".  */
-  if (BE (start > 0, 0))
+  if (__glibc_unlikely (start > 0))
     {
       tree = elem;
       for (i = 2; i <= start; ++i)
 	{
 	  elem = duplicate_tree (elem, dfa);
 	  tree = create_tree (dfa, tree, elem, CONCAT);
-	  if (BE (elem == NULL || tree == NULL, 0))
+	  if (__glibc_unlikely (elem == NULL || tree == NULL))
 	    goto parse_dup_op_espace;
 	}
 
@@ -2632,7 +2636,7 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
 
       /* Duplicate ELEM before it is marked optional.  */
       elem = duplicate_tree (elem, dfa);
-      if (BE (elem == NULL, 0))
+      if (__glibc_unlikely (elem == NULL))
         goto parse_dup_op_espace;
       old_tree = tree;
     }
@@ -2647,7 +2651,7 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
 
   tree = create_tree (dfa, elem, NULL,
 		      (end == -1 ? OP_DUP_ASTERISK : OP_ALT));
-  if (BE (tree == NULL, 0))
+  if (__glibc_unlikely (tree == NULL))
     goto parse_dup_op_espace;
 
   /* This loop is actually executed only when end != -1,
@@ -2658,11 +2662,11 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
       {
 	elem = duplicate_tree (elem, dfa);
 	tree = create_tree (dfa, tree, elem, CONCAT);
-	if (BE (elem == NULL || tree == NULL, 0))
+	if (__glibc_unlikely (elem == NULL || tree == NULL))
 	  goto parse_dup_op_espace;
 
 	tree = create_tree (dfa, tree, NULL, OP_ALT);
-	if (BE (tree == NULL, 0))
+	if (__glibc_unlikely (tree == NULL))
 	  goto parse_dup_op_espace;
       }
 
@@ -2717,17 +2721,18 @@ build_range_exp (const reg_syntax_t syntax,
 {
   unsigned int start_ch, end_ch;
   /* Equivalence Classes and Character Classes can't be a range start/end.  */
-  if (BE (start_elem->type == EQUIV_CLASS || start_elem->type == CHAR_CLASS
-	  || end_elem->type == EQUIV_CLASS || end_elem->type == CHAR_CLASS,
-	  0))
+  if (__glibc_unlikely (start_elem->type == EQUIV_CLASS
+			|| start_elem->type == CHAR_CLASS
+			|| end_elem->type == EQUIV_CLASS
+			|| end_elem->type == CHAR_CLASS))
     return REG_ERANGE;
 
   /* We can handle no multi character collating elements without libc
      support.  */
-  if (BE ((start_elem->type == COLL_SYM
-	   && strlen ((char *) start_elem->opr.name) > 1)
-	  || (end_elem->type == COLL_SYM
-	      && strlen ((char *) end_elem->opr.name) > 1), 0))
+  if (__glibc_unlikely ((start_elem->type == COLL_SYM
+			 && strlen ((char *) start_elem->opr.name) > 1)
+			|| (end_elem->type == COLL_SYM
+			    && strlen ((char *) end_elem->opr.name) > 1)))
     return REG_ECOLLATE;
 
 # ifdef RE_ENABLE_I18N
@@ -2748,7 +2753,8 @@ build_range_exp (const reg_syntax_t syntax,
 	      ? parse_byte (end_ch, mbcset) : end_elem->opr.wch);
     if (start_wc == WEOF || end_wc == WEOF)
       return REG_ECOLLATE;
-    else if (BE ((syntax & RE_NO_EMPTY_RANGES) && start_wc > end_wc, 0))
+    else if (__glibc_unlikely ((syntax & RE_NO_EMPTY_RANGES)
+			       && start_wc > end_wc))
       return REG_ERANGE;
 
     /* Got valid collation sequence values, add them as a new entry.
@@ -2759,7 +2765,7 @@ build_range_exp (const reg_syntax_t syntax,
     if (mbcset)
       {
 	/* Check the space of the arrays.  */
-	if (BE (*range_alloc == mbcset->nranges, 0))
+	if (__glibc_unlikely (*range_alloc == mbcset->nranges))
 	  {
 	    /* There is not enough space, need realloc.  */
 	    wchar_t *new_array_start, *new_array_end;
@@ -2774,7 +2780,8 @@ build_range_exp (const reg_syntax_t syntax,
 	    new_array_end = re_realloc (mbcset->range_ends, wchar_t,
 					new_nranges);
 
-	    if (BE (new_array_start == NULL || new_array_end == NULL, 0))
+	    if (__glibc_unlikely (new_array_start == NULL
+				  || new_array_end == NULL))
 	      {
 		re_free (new_array_start);
 		re_free (new_array_end);
@@ -2834,7 +2841,7 @@ build_collating_symbol (bitset_t sbcset, const unsigned char *name)
 # endif /* not RE_ENABLE_I18N */
 {
   size_t name_len = strlen ((const char *) name);
-  if (BE (name_len != 1, 0))
+  if (__glibc_unlikely (name_len != 1))
     return REG_ECOLLATE;
   else
     {
@@ -2969,18 +2976,21 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 
       /* Equivalence Classes and Character Classes can't be a range
 	 start/end.  */
-      if (BE (start_elem->type == EQUIV_CLASS || start_elem->type == CHAR_CLASS
-	      || end_elem->type == EQUIV_CLASS || end_elem->type == CHAR_CLASS,
-	      0))
+      if (__glibc_unlikely (start_elem->type == EQUIV_CLASS
+			    || start_elem->type == CHAR_CLASS
+			    || end_elem->type == EQUIV_CLASS
+			    || end_elem->type == CHAR_CLASS))
 	return REG_ERANGE;
 
       /* FIXME: Implement rational ranges here, too.  */
       start_collseq = lookup_collation_sequence_value (start_elem);
       end_collseq = lookup_collation_sequence_value (end_elem);
       /* Check start/end collation sequence values.  */
-      if (BE (start_collseq == UINT_MAX || end_collseq == UINT_MAX, 0))
+      if (__glibc_unlikely (start_collseq == UINT_MAX
+			    || end_collseq == UINT_MAX))
 	return REG_ECOLLATE;
-      if (BE ((syntax & RE_NO_EMPTY_RANGES) && start_collseq > end_collseq, 0))
+      if (__glibc_unlikely ((syntax & RE_NO_EMPTY_RANGES)
+			    && start_collseq > end_collseq))
 	return REG_ERANGE;
 
       /* Got valid collation sequence values, add them as a new entry.
@@ -2990,7 +3000,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
       if (nrules > 0 || dfa->mb_cur_max > 1)
 	{
 	  /* Check the space of the arrays.  */
-	  if (BE (*range_alloc == mbcset->nranges, 0))
+	  if (__glibc_unlikely (*range_alloc == mbcset->nranges))
 	    {
 	      /* There is not enough space, need realloc.  */
 	      uint32_t *new_array_start;
@@ -3004,7 +3014,8 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 	      new_array_end = re_realloc (mbcset->range_ends, uint32_t,
 					  new_nranges);
 
-	      if (BE (new_array_start == NULL || new_array_end == NULL, 0))
+	      if (__glibc_unlikely (new_array_start == NULL
+				    || new_array_end == NULL))
 		return REG_ESPACE;
 
 	      mbcset->range_starts = new_array_start;
@@ -3068,7 +3079,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 
 	  /* Got valid collation sequence, add it as a new entry.  */
 	  /* Check the space of the arrays.  */
-	  if (BE (*coll_sym_alloc == mbcset->ncoll_syms, 0))
+	  if (__glibc_unlikely (*coll_sym_alloc == mbcset->ncoll_syms))
 	    {
 	      /* Not enough, realloc it.  */
 	      /* +1 in case of mbcset->ncoll_syms is 0.  */
@@ -3077,7 +3088,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 		 if *alloc == 0.  */
 	      int32_t *new_coll_syms = re_realloc (mbcset->coll_syms, int32_t,
 						   new_coll_sym_alloc);
-	      if (BE (new_coll_syms == NULL, 0))
+	      if (__glibc_unlikely (new_coll_syms == NULL))
 		return REG_ESPACE;
 	      mbcset->coll_syms = new_coll_syms;
 	      *coll_sym_alloc = new_coll_sym_alloc;
@@ -3087,7 +3098,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 	}
       else
 	{
-	  if (BE (name_len != 1, 0))
+	  if (__glibc_unlikely (name_len != 1))
 	    return REG_ECOLLATE;
 	  else
 	    {
@@ -3131,9 +3142,9 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
   mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1);
 #endif /* RE_ENABLE_I18N */
 #ifdef RE_ENABLE_I18N
-  if (BE (sbcset == NULL || mbcset == NULL, 0))
+  if (__glibc_unlikely (sbcset == NULL || mbcset == NULL))
 #else
-  if (BE (sbcset == NULL, 0))
+  if (__glibc_unlikely (sbcset == NULL))
 #endif /* RE_ENABLE_I18N */
     {
       re_free (sbcset);
@@ -3145,7 +3156,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
     }
 
   token_len = peek_token_bracket (token, regexp, syntax);
-  if (BE (token->type == END_OF_RE, 0))
+  if (__glibc_unlikely (token->type == END_OF_RE))
     {
       *err = REG_BADPAT;
       goto parse_bracket_exp_free_return;
@@ -3160,7 +3171,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 	bitset_set (sbcset, '\n');
       re_string_skip_bytes (regexp, token_len); /* Skip a token.  */
       token_len = peek_token_bracket (token, regexp, syntax);
-      if (BE (token->type == END_OF_RE, 0))
+      if (__glibc_unlikely (token->type == END_OF_RE))
 	{
 	  *err = REG_BADPAT;
 	  goto parse_bracket_exp_free_return;
@@ -3185,7 +3196,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
       start_elem.type = COLL_SYM;
       ret = parse_bracket_element (&start_elem, regexp, token, token_len, dfa,
 				   syntax, first_round);
-      if (BE (ret != REG_NOERROR, 0))
+      if (__glibc_unlikely (ret != REG_NOERROR))
 	{
 	  *err = ret;
 	  goto parse_bracket_exp_free_return;
@@ -3198,7 +3209,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
       /* Do not check for ranges if we know they are not allowed.  */
       if (start_elem.type != CHAR_CLASS && start_elem.type != EQUIV_CLASS)
 	{
-	  if (BE (token->type == END_OF_RE, 0))
+	  if (__glibc_unlikely (token->type == END_OF_RE))
 	    {
 	      *err = REG_EBRACK;
 	      goto parse_bracket_exp_free_return;
@@ -3207,7 +3218,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 	    {
 	      re_string_skip_bytes (regexp, token_len); /* Skip '-'.  */
 	      token_len2 = peek_token_bracket (&token2, regexp, syntax);
-	      if (BE (token2.type == END_OF_RE, 0))
+	      if (__glibc_unlikely (token2.type == END_OF_RE))
 		{
 		  *err = REG_EBRACK;
 		  goto parse_bracket_exp_free_return;
@@ -3229,7 +3240,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 	  end_elem.type = COLL_SYM;
 	  ret = parse_bracket_element (&end_elem, regexp, &token2, token_len2,
 				       dfa, syntax, true);
-	  if (BE (ret != REG_NOERROR, 0))
+	  if (__glibc_unlikely (ret != REG_NOERROR))
 	    {
 	      *err = ret;
 	      goto parse_bracket_exp_free_return;
@@ -3249,7 +3260,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 	  *err = build_range_exp (syntax, sbcset, &start_elem, &end_elem);
 # endif
 #endif /* RE_ENABLE_I18N */
-	  if (BE (*err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (*err != REG_NOERROR))
 	    goto parse_bracket_exp_free_return;
 	}
       else
@@ -3262,7 +3273,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 #ifdef RE_ENABLE_I18N
 	    case MB_CHAR:
 	      /* Check whether the array has enough space.  */
-	      if (BE (mbchar_alloc == mbcset->nmbchars, 0))
+	      if (__glibc_unlikely (mbchar_alloc == mbcset->nmbchars))
 		{
 		  wchar_t *new_mbchars;
 		  /* Not enough, realloc it.  */
@@ -3271,7 +3282,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 		  /* Use realloc since array is NULL if *alloc == 0.  */
 		  new_mbchars = re_realloc (mbcset->mbchars, wchar_t,
 					    mbchar_alloc);
-		  if (BE (new_mbchars == NULL, 0))
+		  if (__glibc_unlikely (new_mbchars == NULL))
 		    goto parse_bracket_exp_espace;
 		  mbcset->mbchars = new_mbchars;
 		}
@@ -3284,7 +3295,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 					mbcset, &equiv_class_alloc,
 #endif /* RE_ENABLE_I18N */
 					start_elem.opr.name);
-	      if (BE (*err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (*err != REG_NOERROR))
 		goto parse_bracket_exp_free_return;
 	      break;
 	    case COLL_SYM:
@@ -3293,7 +3304,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 					     mbcset, &coll_sym_alloc,
 #endif /* RE_ENABLE_I18N */
 					     start_elem.opr.name);
-	      if (BE (*err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (*err != REG_NOERROR))
 		goto parse_bracket_exp_free_return;
 	      break;
 	    case CHAR_CLASS:
@@ -3303,7 +3314,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 #endif /* RE_ENABLE_I18N */
 				      (const char *) start_elem.opr.name,
 				      syntax);
-	      if (BE (*err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (*err != REG_NOERROR))
 	       goto parse_bracket_exp_free_return;
 	      break;
 	    default:
@@ -3311,7 +3322,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 	      break;
 	    }
 	}
-      if (BE (token->type == END_OF_RE, 0))
+      if (__glibc_unlikely (token->type == END_OF_RE))
 	{
 	  *err = REG_EBRACK;
 	  goto parse_bracket_exp_free_return;
@@ -3342,7 +3353,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
       br_token.type = COMPLEX_BRACKET;
       br_token.opr.mbcset = mbcset;
       mbc_tree = create_token_tree (dfa, NULL, NULL, &br_token);
-      if (BE (mbc_tree == NULL, 0))
+      if (__glibc_unlikely (mbc_tree == NULL))
 	goto parse_bracket_exp_espace;
       for (sbc_idx = 0; sbc_idx < BITSET_WORDS; ++sbc_idx)
 	if (sbcset[sbc_idx])
@@ -3355,12 +3366,12 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
 	  br_token.type = SIMPLE_BRACKET;
 	  br_token.opr.sbcset = sbcset;
 	  work_tree = create_token_tree (dfa, NULL, NULL, &br_token);
-	  if (BE (work_tree == NULL, 0))
+	  if (__glibc_unlikely (work_tree == NULL))
 	    goto parse_bracket_exp_espace;
 
 	  /* Then join them by ALT node.  */
 	  work_tree = create_tree (dfa, work_tree, mbc_tree, OP_ALT);
-	  if (BE (work_tree == NULL, 0))
+	  if (__glibc_unlikely (work_tree == NULL))
 	    goto parse_bracket_exp_espace;
 	}
       else
@@ -3379,7 +3390,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
       br_token.type = SIMPLE_BRACKET;
       br_token.opr.sbcset = sbcset;
       work_tree = create_token_tree (dfa, NULL, NULL, &br_token);
-      if (BE (work_tree == NULL, 0))
+      if (__glibc_unlikely (work_tree == NULL))
 	goto parse_bracket_exp_espace;
     }
   return work_tree;
@@ -3416,7 +3427,7 @@ parse_bracket_element (bracket_elem_t *elem, re_string_t *regexp,
   if (token->type == OP_OPEN_COLL_ELEM || token->type == OP_OPEN_CHAR_CLASS
       || token->type == OP_OPEN_EQUIV_CLASS)
     return parse_bracket_symbol (elem, regexp, token);
-  if (BE (token->type == OP_CHARSET_RANGE, 0) && !accept_hyphen)
+  if (__glibc_unlikely (token->type == OP_CHARSET_RANGE) && !accept_hyphen)
     {
       /* A '-' must only appear as anything but a range indicator before
 	 the closing bracket.  Everything else is an error.  */
@@ -3511,7 +3522,7 @@ build_equiv_class (bitset_t sbcset, const unsigned char *name)
       indirect = (const int32_t *) _NL_CURRENT (LC_COLLATE,
 						_NL_COLLATE_INDIRECTMB);
       idx1 = findidx (table, indirect, extra, &cp, -1);
-      if (BE (idx1 == 0 || *cp != '\0', 0))
+      if (__glibc_unlikely (idx1 == 0 || *cp != '\0'))
 	/* This isn't a valid character.  */
 	return REG_ECOLLATE;
 
@@ -3536,7 +3547,7 @@ build_equiv_class (bitset_t sbcset, const unsigned char *name)
 	    bitset_set (sbcset, ch);
 	}
       /* Check whether the array has enough space.  */
-      if (BE (*equiv_class_alloc == mbcset->nequiv_classes, 0))
+      if (__glibc_unlikely (*equiv_class_alloc == mbcset->nequiv_classes))
 	{
 	  /* Not enough, realloc it.  */
 	  /* +1 in case of mbcset->nequiv_classes is 0.  */
@@ -3545,7 +3556,7 @@ build_equiv_class (bitset_t sbcset, const unsigned char *name)
 	  int32_t *new_equiv_classes = re_realloc (mbcset->equiv_classes,
 						   int32_t,
 						   new_equiv_class_alloc);
-	  if (BE (new_equiv_classes == NULL, 0))
+	  if (__glibc_unlikely (new_equiv_classes == NULL))
 	    return REG_ESPACE;
 	  mbcset->equiv_classes = new_equiv_classes;
 	  *equiv_class_alloc = new_equiv_class_alloc;
@@ -3555,7 +3566,7 @@ build_equiv_class (bitset_t sbcset, const unsigned char *name)
   else
 #endif /* _LIBC */
     {
-      if (BE (strlen ((const char *) name) != 1, 0))
+      if (__glibc_unlikely (strlen ((const char *) name) != 1))
 	return REG_ECOLLATE;
       bitset_set (sbcset, *name);
     }
@@ -3589,7 +3600,7 @@ build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset,
 
 #ifdef RE_ENABLE_I18N
   /* Check the space of the arrays.  */
-  if (BE (*char_class_alloc == mbcset->nchar_classes, 0))
+  if (__glibc_unlikely (*char_class_alloc == mbcset->nchar_classes))
     {
       /* Not enough, realloc it.  */
       /* +1 in case of mbcset->nchar_classes is 0.  */
@@ -3597,7 +3608,7 @@ build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset,
       /* Use realloc since array is NULL if *alloc == 0.  */
       wctype_t *new_char_classes = re_realloc (mbcset->char_classes, wctype_t,
 					       new_char_class_alloc);
-      if (BE (new_char_classes == NULL, 0))
+      if (__glibc_unlikely (new_char_classes == NULL))
 	return REG_ESPACE;
       mbcset->char_classes = new_char_classes;
       *char_class_alloc = new_char_class_alloc;
@@ -3607,7 +3618,7 @@ build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset,
 
 #define BUILD_CHARCLASS_LOOP(ctype_func)	\
   do {						\
-    if (BE (trans != NULL, 0))			\
+    if (__glibc_unlikely (trans != NULL))			\
       {						\
 	for (i = 0; i < SBC_MAX; ++i)		\
 	  if (ctype_func (i))			\
@@ -3667,14 +3678,14 @@ build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
   bin_tree_t *tree;
 
   sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
-  if (BE (sbcset == NULL, 0))
+  if (__glibc_unlikely (sbcset == NULL))
     {
       *err = REG_ESPACE;
       return NULL;
     }
 #ifdef RE_ENABLE_I18N
   mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1);
-  if (BE (mbcset == NULL, 0))
+  if (__glibc_unlikely (mbcset == NULL))
     {
       re_free (sbcset);
       *err = REG_ESPACE;
@@ -3690,7 +3701,7 @@ build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
 #endif /* RE_ENABLE_I18N */
 			 class_name, 0);
 
-  if (BE (ret != REG_NOERROR, 0))
+  if (__glibc_unlikely (ret != REG_NOERROR))
     {
       re_free (sbcset);
 #ifdef RE_ENABLE_I18N
@@ -3720,7 +3731,7 @@ build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
   br_token.type = SIMPLE_BRACKET;
   br_token.opr.sbcset = sbcset;
   tree = create_token_tree (dfa, NULL, NULL, &br_token);
-  if (BE (tree == NULL, 0))
+  if (__glibc_unlikely (tree == NULL))
     goto build_word_op_espace;
 
 #ifdef RE_ENABLE_I18N
@@ -3732,11 +3743,11 @@ build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
       br_token.opr.mbcset = mbcset;
       dfa->has_mb_node = 1;
       mbc_tree = create_token_tree (dfa, NULL, NULL, &br_token);
-      if (BE (mbc_tree == NULL, 0))
+      if (__glibc_unlikely (mbc_tree == NULL))
 	goto build_word_op_espace;
       /* Then join them by ALT node.  */
       tree = create_tree (dfa, tree, mbc_tree, OP_ALT);
-      if (BE (mbc_tree != NULL, 1))
+      if (__glibc_likely (mbc_tree != NULL))
 	return tree;
     }
   else
@@ -3772,7 +3783,7 @@ fetch_number (re_string_t *input, re_token_t *token, reg_syntax_t syntax)
     {
       fetch_token (token, input, syntax);
       c = token->opr.c;
-      if (BE (token->type == END_OF_RE, 0))
+      if (__glibc_unlikely (token->type == END_OF_RE))
 	return -2;
       if (token->type == OP_CLOSE_DUP_NUM || c == ',')
 	break;
@@ -3822,7 +3833,7 @@ create_token_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right,
 		   const re_token_t *token)
 {
   bin_tree_t *tree;
-  if (BE (dfa->str_tree_storage_idx == BIN_TREE_STORAGE_SIZE, 0))
+  if (__glibc_unlikely (dfa->str_tree_storage_idx == BIN_TREE_STORAGE_SIZE))
     {
       bin_tree_storage_t *storage = re_malloc (bin_tree_storage_t, 1);
 
diff --git a/posix/regex.c b/posix/regex.c
index d6591e8670..a80e740c68 100644
--- a/posix/regex.c
+++ b/posix/regex.c
@@ -18,7 +18,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #ifndef _LIBC
-# include <config.h>
+# include <libc-config.h>
 
 # if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
 #  pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
diff --git a/posix/regex_internal.c b/posix/regex_internal.c
index b10588f1cc..349d306b56 100644
--- a/posix/regex_internal.c
+++ b/posix/regex_internal.c
@@ -59,7 +59,7 @@ re_string_allocate (re_string_t *pstr, const char *str, Idx len, Idx init_len,
   re_string_construct_common (str, len, pstr, trans, icase, dfa);
 
   ret = re_string_realloc_buffers (pstr, init_buf_len);
-  if (BE (ret != REG_NOERROR, 0))
+  if (__glibc_unlikely (ret != REG_NOERROR))
     return ret;
 
   pstr->word_char = dfa->word_char;
@@ -84,7 +84,7 @@ re_string_construct (re_string_t *pstr, const char *str, Idx len,
   if (len > 0)
     {
       ret = re_string_realloc_buffers (pstr, len + 1);
-      if (BE (ret != REG_NOERROR, 0))
+      if (__glibc_unlikely (ret != REG_NOERROR))
 	return ret;
     }
   pstr->mbs = pstr->mbs_allocated ? pstr->mbs : (unsigned char *) str;
@@ -97,14 +97,14 @@ re_string_construct (re_string_t *pstr, const char *str, Idx len,
 	  while (1)
 	    {
 	      ret = build_wcs_upper_buffer (pstr);
-	      if (BE (ret != REG_NOERROR, 0))
+	      if (__glibc_unlikely (ret != REG_NOERROR))
 		return ret;
 	      if (pstr->valid_raw_len >= len)
 		break;
 	      if (pstr->bufs_len > pstr->valid_len + dfa->mb_cur_max)
 		break;
 	      ret = re_string_realloc_buffers (pstr, pstr->bufs_len * 2);
-	      if (BE (ret != REG_NOERROR, 0))
+	      if (__glibc_unlikely (ret != REG_NOERROR))
 		return ret;
 	    }
 	}
@@ -146,17 +146,18 @@ re_string_realloc_buffers (re_string_t *pstr, Idx new_buf_len)
 
       /* Avoid overflow in realloc.  */
       const size_t max_object_size = MAX (sizeof (wint_t), sizeof (Idx));
-      if (BE (MIN (IDX_MAX, SIZE_MAX / max_object_size) < new_buf_len, 0))
+      if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size)
+			    < new_buf_len))
 	return REG_ESPACE;
 
       new_wcs = re_realloc (pstr->wcs, wint_t, new_buf_len);
-      if (BE (new_wcs == NULL, 0))
+      if (__glibc_unlikely (new_wcs == NULL))
 	return REG_ESPACE;
       pstr->wcs = new_wcs;
       if (pstr->offsets != NULL)
 	{
 	  Idx *new_offsets = re_realloc (pstr->offsets, Idx, new_buf_len);
-	  if (BE (new_offsets == NULL, 0))
+	  if (__glibc_unlikely (new_offsets == NULL))
 	    return REG_ESPACE;
 	  pstr->offsets = new_offsets;
 	}
@@ -166,7 +167,7 @@ re_string_realloc_buffers (re_string_t *pstr, Idx new_buf_len)
     {
       unsigned char *new_mbs = re_realloc (pstr->mbs, unsigned char,
 					   new_buf_len);
-      if (BE (new_mbs == NULL, 0))
+      if (__glibc_unlikely (new_mbs == NULL))
 	return REG_ESPACE;
       pstr->mbs = new_mbs;
     }
@@ -230,7 +231,7 @@ build_wcs_buffer (re_string_t *pstr)
       remain_len = end_idx - byte_idx;
       prev_st = pstr->cur_state;
       /* Apply the translation if we need.  */
-      if (BE (pstr->trans != NULL, 0))
+      if (__glibc_unlikely (pstr->trans != NULL))
 	{
 	  int i, ch;
 
@@ -244,17 +245,18 @@ build_wcs_buffer (re_string_t *pstr)
       else
 	p = (const char *) pstr->raw_mbs + pstr->raw_mbs_idx + byte_idx;
       mbclen = __mbrtowc (&wc, p, remain_len, &pstr->cur_state);
-      if (BE (mbclen == (size_t) -1 || mbclen == 0
-	      || (mbclen == (size_t) -2 && pstr->bufs_len >= pstr->len), 0))
+      if (__glibc_unlikely (mbclen == (size_t) -1 || mbclen == 0
+			    || (mbclen == (size_t) -2
+				&& pstr->bufs_len >= pstr->len)))
 	{
 	  /* We treat these cases as a singlebyte character.  */
 	  mbclen = 1;
 	  wc = (wchar_t) pstr->raw_mbs[pstr->raw_mbs_idx + byte_idx];
-	  if (BE (pstr->trans != NULL, 0))
+	  if (__glibc_unlikely (pstr->trans != NULL))
 	    wc = pstr->trans[wc];
 	  pstr->cur_state = prev_st;
 	}
-      else if (BE (mbclen == (size_t) -2, 0))
+      else if (__glibc_unlikely (mbclen == (size_t) -2))
 	{
 	  /* The buffer doesn't have enough space, finish to build.  */
 	  pstr->cur_state = prev_st;
@@ -317,7 +319,7 @@ build_wcs_upper_buffer (re_string_t *pstr)
 	  mbclen = __mbrtowc (&wc,
 			      ((const char *) pstr->raw_mbs + pstr->raw_mbs_idx
 			       + byte_idx), remain_len, &pstr->cur_state);
-	  if (BE (0 < mbclen && mbclen < (size_t) -2, 1))
+	  if (__glibc_likely (0 < mbclen && mbclen < (size_t) -2))
 	    {
 	      wchar_t wcu = __towupper (wc);
 	      if (wcu != wc)
@@ -325,7 +327,7 @@ build_wcs_upper_buffer (re_string_t *pstr)
 		  size_t mbcdlen;
 
 		  mbcdlen = __wcrtomb (buf, wcu, &prev_st);
-		  if (BE (mbclen == mbcdlen, 1))
+		  if (__glibc_likely (mbclen == mbcdlen))
 		    memcpy (pstr->mbs + byte_idx, buf, mbclen);
 		  else
 		    {
@@ -350,7 +352,7 @@ build_wcs_upper_buffer (re_string_t *pstr)
 	      pstr->mbs[byte_idx] = ch;
 	      /* And also cast it to wide char.  */
 	      pstr->wcs[byte_idx++] = (wchar_t) ch;
-	      if (BE (mbclen == (size_t) -1, 0))
+	      if (__glibc_unlikely (mbclen == (size_t) -1))
 		pstr->cur_state = prev_st;
 	    }
 	  else
@@ -372,7 +374,7 @@ build_wcs_upper_buffer (re_string_t *pstr)
       offsets_needed:
 	remain_len = end_idx - byte_idx;
 	prev_st = pstr->cur_state;
-	if (BE (pstr->trans != NULL, 0))
+	if (__glibc_unlikely (pstr->trans != NULL))
 	  {
 	    int i, ch;
 
@@ -386,7 +388,7 @@ build_wcs_upper_buffer (re_string_t *pstr)
 	else
 	  p = (const char *) pstr->raw_mbs + pstr->raw_mbs_idx + src_idx;
 	mbclen = __mbrtowc (&wc, p, remain_len, &pstr->cur_state);
-	if (BE (0 < mbclen && mbclen < (size_t) -2, 1))
+	if (__glibc_likely (0 < mbclen && mbclen < (size_t) -2))
 	  {
 	    wchar_t wcu = __towupper (wc);
 	    if (wcu != wc)
@@ -394,7 +396,7 @@ build_wcs_upper_buffer (re_string_t *pstr)
 		size_t mbcdlen;
 
 		mbcdlen = __wcrtomb ((char *) buf, wcu, &prev_st);
-		if (BE (mbclen == mbcdlen, 1))
+		if (__glibc_likely (mbclen == mbcdlen))
 		  memcpy (pstr->mbs + byte_idx, buf, mbclen);
 		else if (mbcdlen != (size_t) -1)
 		  {
@@ -444,7 +446,7 @@ build_wcs_upper_buffer (re_string_t *pstr)
 	    else
 	      memcpy (pstr->mbs + byte_idx, p, mbclen);
 
-	    if (BE (pstr->offsets_needed != 0, 0))
+	    if (__glibc_unlikely (pstr->offsets_needed != 0))
 	      {
 		size_t i;
 		for (i = 0; i < mbclen; ++i)
@@ -463,17 +465,17 @@ build_wcs_upper_buffer (re_string_t *pstr)
 	    /* It is an invalid character or '\0'.  Just use the byte.  */
 	    int ch = pstr->raw_mbs[pstr->raw_mbs_idx + src_idx];
 
-	    if (BE (pstr->trans != NULL, 0))
+	    if (__glibc_unlikely (pstr->trans != NULL))
 	      ch = pstr->trans [ch];
 	    pstr->mbs[byte_idx] = ch;
 
-	    if (BE (pstr->offsets_needed != 0, 0))
+	    if (__glibc_unlikely (pstr->offsets_needed != 0))
 	      pstr->offsets[byte_idx] = src_idx;
 	    ++src_idx;
 
 	    /* And also cast it to wide char.  */
 	    pstr->wcs[byte_idx++] = (wchar_t) ch;
-	    if (BE (mbclen == (size_t) -1, 0))
+	    if (__glibc_unlikely (mbclen == (size_t) -1))
 	      pstr->cur_state = prev_st;
 	  }
 	else
@@ -508,7 +510,8 @@ re_string_skip_chars (re_string_t *pstr, Idx new_raw_idx, wint_t *last_wc)
       prev_st = pstr->cur_state;
       mbclen = __mbrtowc (&wc2, (const char *) pstr->raw_mbs + rawbuf_idx,
 			  remain_len, &pstr->cur_state);
-      if (BE (mbclen == (size_t) -2 || mbclen == (size_t) -1 || mbclen == 0, 0))
+      if (__glibc_unlikely (mbclen == (size_t) -2 || mbclen == (size_t) -1
+			    || mbclen == 0))
 	{
 	  /* We treat these cases as a single byte character.  */
 	  if (mbclen == 0 || remain_len == 0)
@@ -540,7 +543,7 @@ build_upper_buffer (re_string_t *pstr)
   for (char_idx = pstr->valid_len; char_idx < end_idx; ++char_idx)
     {
       int ch = pstr->raw_mbs[pstr->raw_mbs_idx + char_idx];
-      if (BE (pstr->trans != NULL, 0))
+      if (__glibc_unlikely (pstr->trans != NULL))
 	ch = pstr->trans[ch];
       pstr->mbs[char_idx] = toupper (ch);
     }
@@ -576,7 +579,7 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
 {
   Idx offset;
 
-  if (BE (pstr->raw_mbs_idx <= idx, 0))
+  if (__glibc_unlikely (pstr->raw_mbs_idx <= idx))
     offset = idx - pstr->raw_mbs_idx;
   else
     {
@@ -598,14 +601,14 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
       offset = idx;
     }
 
-  if (BE (offset != 0, 1))
+  if (__glibc_likely (offset != 0))
     {
       /* Should the already checked characters be kept?  */
-      if (BE (offset < pstr->valid_raw_len, 1))
+      if (__glibc_likely (offset < pstr->valid_raw_len))
 	{
 	  /* Yes, move them to the front of the buffer.  */
 #ifdef RE_ENABLE_I18N
-	  if (BE (pstr->offsets_needed, 0))
+	  if (__glibc_unlikely (pstr->offsets_needed))
 	    {
 	      Idx low = 0, high = pstr->valid_len, mid;
 	      do
@@ -677,7 +680,7 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
 		memmove (pstr->wcs, pstr->wcs + offset,
 			 (pstr->valid_len - offset) * sizeof (wint_t));
 #endif /* RE_ENABLE_I18N */
-	      if (BE (pstr->mbs_allocated, 0))
+	      if (__glibc_unlikely (pstr->mbs_allocated))
 		memmove (pstr->mbs, pstr->mbs + offset,
 			 pstr->valid_len - offset);
 	      pstr->valid_len -= offset;
@@ -693,7 +696,7 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
 	  /* No, skip all characters until IDX.  */
 	  Idx prev_valid_len = pstr->valid_len;
 
-	  if (BE (pstr->offsets_needed, 0))
+	  if (__glibc_unlikely (pstr->offsets_needed))
 	    {
 	      pstr->len = pstr->raw_len - idx + offset;
 	      pstr->stop = pstr->raw_stop - idx + offset;
@@ -721,7 +724,7 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
 #ifdef _LIBC
 		  /* We know the wchar_t encoding is UCS4, so for the simple
 		     case, ASCII characters, skip the conversion step.  */
-		  if (isascii (*p) && BE (pstr->trans == NULL, 1))
+		  if (isascii (*p) && __glibc_likely (pstr->trans == NULL))
 		    {
 		      memset (&pstr->cur_state, '\0', sizeof (mbstate_t));
 		      /* pstr->valid_len = 0; */
@@ -739,7 +742,7 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
 			  size_t mbclen;
 
 			  const unsigned char *pp = p;
-			  if (BE (pstr->trans != NULL, 0))
+			  if (__glibc_unlikely (pstr->trans != NULL))
 			    {
 			      int i = mlen < 6 ? mlen : 6;
 			      while (--i >= 0)
@@ -769,13 +772,13 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
 		pstr->tip_context
 		  = re_string_context_at (pstr, prev_valid_len - 1, eflags);
 	      else
-		pstr->tip_context = ((BE (pstr->word_ops_used != 0, 0)
+		pstr->tip_context = ((__glibc_unlikely (pstr->word_ops_used != 0)
 				      && IS_WIDE_WORD_CHAR (wc))
 				     ? CONTEXT_WORD
 				     : ((IS_WIDE_NEWLINE (wc)
 					 && pstr->newline_anchor)
 					? CONTEXT_NEWLINE : 0));
-	      if (BE (pstr->valid_len, 0))
+	      if (__glibc_unlikely (pstr->valid_len))
 		{
 		  for (wcs_idx = 0; wcs_idx < pstr->valid_len; ++wcs_idx)
 		    pstr->wcs[wcs_idx] = WEOF;
@@ -797,7 +800,7 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
 				      ? CONTEXT_NEWLINE : 0));
 	    }
 	}
-      if (!BE (pstr->mbs_allocated, 0))
+      if (!__glibc_unlikely (pstr->mbs_allocated))
 	pstr->mbs += offset;
     }
   pstr->raw_mbs_idx = idx;
@@ -811,7 +814,7 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
       if (pstr->icase)
 	{
 	  reg_errcode_t ret = build_wcs_upper_buffer (pstr);
-	  if (BE (ret != REG_NOERROR, 0))
+	  if (__glibc_unlikely (ret != REG_NOERROR))
 	    return ret;
 	}
       else
@@ -819,7 +822,7 @@ re_string_reconstruct (re_string_t *pstr, Idx idx, int eflags)
     }
   else
 #endif /* RE_ENABLE_I18N */
-    if (BE (pstr->mbs_allocated, 0))
+    if (__glibc_unlikely (pstr->mbs_allocated))
       {
 	if (pstr->icase)
 	  build_upper_buffer (pstr);
@@ -841,7 +844,7 @@ re_string_peek_byte_case (const re_string_t *pstr, Idx idx)
   Idx off;
 
   /* Handle the common (easiest) cases first.  */
-  if (BE (!pstr->mbs_allocated, 1))
+  if (__glibc_likely (!pstr->mbs_allocated))
     return re_string_peek_byte (pstr, idx);
 
 #ifdef RE_ENABLE_I18N
@@ -873,7 +876,7 @@ re_string_peek_byte_case (const re_string_t *pstr, Idx idx)
 static unsigned char
 re_string_fetch_byte_case (re_string_t *pstr)
 {
-  if (BE (!pstr->mbs_allocated, 1))
+  if (__glibc_likely (!pstr->mbs_allocated))
     return re_string_fetch_byte (pstr);
 
 #ifdef RE_ENABLE_I18N
@@ -924,11 +927,11 @@ static unsigned int
 re_string_context_at (const re_string_t *input, Idx idx, int eflags)
 {
   int c;
-  if (BE (idx < 0, 0))
+  if (__glibc_unlikely (idx < 0))
     /* In this case, we use the value stored in input->tip_context,
        since we can't know the character in input->mbs[-1] here.  */
     return input->tip_context;
-  if (BE (idx == input->len, 0))
+  if (__glibc_unlikely (idx == input->len))
     return ((eflags & REG_NOTEOL) ? CONTEXT_ENDBUF
 	    : CONTEXT_NEWLINE | CONTEXT_ENDBUF);
 #ifdef RE_ENABLE_I18N
@@ -947,7 +950,8 @@ re_string_context_at (const re_string_t *input, Idx idx, int eflags)
 	    return input->tip_context;
 	}
       wc = input->wcs[wc_idx];
-      if (BE (input->word_ops_used != 0, 0) && IS_WIDE_WORD_CHAR (wc))
+      if (__glibc_unlikely (input->word_ops_used != 0)
+	  && IS_WIDE_WORD_CHAR (wc))
 	return CONTEXT_WORD;
       return (IS_WIDE_NEWLINE (wc) && input->newline_anchor
 	      ? CONTEXT_NEWLINE : 0);
@@ -971,7 +975,8 @@ re_node_set_alloc (re_node_set *set, Idx size)
   set->alloc = size;
   set->nelem = 0;
   set->elems = re_malloc (Idx, size);
-  if (BE (set->elems == NULL, 0) && (MALLOC_0_IS_NONNULL || size != 0))
+  if (__glibc_unlikely (set->elems == NULL)
+      && (MALLOC_0_IS_NONNULL || size != 0))
     return REG_ESPACE;
   return REG_NOERROR;
 }
@@ -983,7 +988,7 @@ re_node_set_init_1 (re_node_set *set, Idx elem)
   set->alloc = 1;
   set->nelem = 1;
   set->elems = re_malloc (Idx, 1);
-  if (BE (set->elems == NULL, 0))
+  if (__glibc_unlikely (set->elems == NULL))
     {
       set->alloc = set->nelem = 0;
       return REG_ESPACE;
@@ -998,7 +1003,7 @@ re_node_set_init_2 (re_node_set *set, Idx elem1, Idx elem2)
 {
   set->alloc = 2;
   set->elems = re_malloc (Idx, 2);
-  if (BE (set->elems == NULL, 0))
+  if (__glibc_unlikely (set->elems == NULL))
     return REG_ESPACE;
   if (elem1 == elem2)
     {
@@ -1031,7 +1036,7 @@ re_node_set_init_copy (re_node_set *dest, const re_node_set *src)
     {
       dest->alloc = dest->nelem;
       dest->elems = re_malloc (Idx, dest->alloc);
-      if (BE (dest->elems == NULL, 0))
+      if (__glibc_unlikely (dest->elems == NULL))
 	{
 	  dest->alloc = dest->nelem = 0;
 	  return REG_ESPACE;
@@ -1062,7 +1067,7 @@ re_node_set_add_intersect (re_node_set *dest, const re_node_set *src1,
     {
       Idx new_alloc = src1->nelem + src2->nelem + dest->alloc;
       Idx *new_elems = re_realloc (dest->elems, Idx, new_alloc);
-      if (BE (new_elems == NULL, 0))
+      if (__glibc_unlikely (new_elems == NULL))
 	return REG_ESPACE;
       dest->elems = new_elems;
       dest->alloc = new_alloc;
@@ -1148,7 +1153,7 @@ re_node_set_init_union (re_node_set *dest, const re_node_set *src1,
     {
       dest->alloc = src1->nelem + src2->nelem;
       dest->elems = re_malloc (Idx, dest->alloc);
-      if (BE (dest->elems == NULL, 0))
+      if (__glibc_unlikely (dest->elems == NULL))
 	return REG_ESPACE;
     }
   else
@@ -1202,13 +1207,13 @@ re_node_set_merge (re_node_set *dest, const re_node_set *src)
     {
       Idx new_alloc = 2 * (src->nelem + dest->alloc);
       Idx *new_buffer = re_realloc (dest->elems, Idx, new_alloc);
-      if (BE (new_buffer == NULL, 0))
+      if (__glibc_unlikely (new_buffer == NULL))
 	return REG_ESPACE;
       dest->elems = new_buffer;
       dest->alloc = new_alloc;
     }
 
-  if (BE (dest->nelem == 0, 0))
+  if (__glibc_unlikely (dest->nelem == 0))
     {
       dest->nelem = src->nelem;
       memcpy (dest->elems, src->elems, src->nelem * sizeof (Idx));
@@ -1281,9 +1286,9 @@ re_node_set_insert (re_node_set *set, Idx elem)
   Idx idx;
   /* In case the set is empty.  */
   if (set->alloc == 0)
-    return BE (re_node_set_init_1 (set, elem) == REG_NOERROR, 1);
+    return __glibc_likely (re_node_set_init_1 (set, elem) == REG_NOERROR);
 
-  if (BE (set->nelem, 0) == 0)
+  if (__glibc_unlikely (set->nelem) == 0)
     {
       /* We already guaranteed above that set->alloc != 0.  */
       set->elems[0] = elem;
@@ -1297,7 +1302,7 @@ re_node_set_insert (re_node_set *set, Idx elem)
       Idx *new_elems;
       set->alloc = set->alloc * 2;
       new_elems = re_realloc (set->elems, Idx, set->alloc);
-      if (BE (new_elems == NULL, 0))
+      if (__glibc_unlikely (new_elems == NULL))
 	return false;
       set->elems = new_elems;
     }
@@ -1336,7 +1341,7 @@ re_node_set_insert_last (re_node_set *set, Idx elem)
       Idx *new_elems;
       set->alloc = (set->alloc + 1) * 2;
       new_elems = re_realloc (set->elems, Idx, set->alloc);
-      if (BE (new_elems == NULL, 0))
+      if (__glibc_unlikely (new_elems == NULL))
 	return false;
       set->elems = new_elems;
     }
@@ -1403,7 +1408,7 @@ re_node_set_remove_at (re_node_set *set, Idx idx)
 static Idx
 re_dfa_add_node (re_dfa_t *dfa, re_token_t token)
 {
-  if (BE (dfa->nodes_len >= dfa->nodes_alloc, 0))
+  if (__glibc_unlikely (dfa->nodes_len >= dfa->nodes_alloc))
     {
       size_t new_nodes_alloc = dfa->nodes_alloc * 2;
       Idx *new_nexts, *new_indices;
@@ -1414,19 +1419,20 @@ re_dfa_add_node (re_dfa_t *dfa, re_token_t token)
       const size_t max_object_size = MAX (sizeof (re_token_t),
 					  MAX (sizeof (re_node_set),
 					       sizeof (Idx)));
-      if (BE (MIN (IDX_MAX, SIZE_MAX / max_object_size) < new_nodes_alloc, 0))
+      if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size)
+			    < new_nodes_alloc))
 	return -1;
 
       new_nodes = re_realloc (dfa->nodes, re_token_t, new_nodes_alloc);
-      if (BE (new_nodes == NULL, 0))
+      if (__glibc_unlikely (new_nodes == NULL))
 	return -1;
       dfa->nodes = new_nodes;
       new_nexts = re_realloc (dfa->nexts, Idx, new_nodes_alloc);
       new_indices = re_realloc (dfa->org_indices, Idx, new_nodes_alloc);
       new_edests = re_realloc (dfa->edests, re_node_set, new_nodes_alloc);
       new_eclosures = re_realloc (dfa->eclosures, re_node_set, new_nodes_alloc);
-      if (BE (new_nexts == NULL || new_indices == NULL
-	      || new_edests == NULL || new_eclosures == NULL, 0))
+      if (__glibc_unlikely (new_nexts == NULL || new_indices == NULL
+			    || new_edests == NULL || new_eclosures == NULL))
 	{
 	   re_free (new_nexts);
 	   re_free (new_indices);
@@ -1485,7 +1491,7 @@ re_acquire_state (reg_errcode_t *err, const re_dfa_t *dfa,
   /* Suppress bogus uninitialized-variable warnings.  */
   *err = REG_NOERROR;
 #endif
-  if (BE (nodes->nelem == 0, 0))
+  if (__glibc_unlikely (nodes->nelem == 0))
     {
       *err = REG_NOERROR;
       return NULL;
@@ -1504,7 +1510,7 @@ re_acquire_state (reg_errcode_t *err, const re_dfa_t *dfa,
 
   /* There are no appropriate state in the dfa, create the new one.  */
   new_state = create_ci_newstate (dfa, nodes, hash);
-  if (BE (new_state == NULL, 0))
+  if (__glibc_unlikely (new_state == NULL))
     *err = REG_ESPACE;
 
   return new_state;
@@ -1551,7 +1557,7 @@ re_acquire_state_context (reg_errcode_t *err, const re_dfa_t *dfa,
     }
   /* There are no appropriate state in 'dfa', create the new one.  */
   new_state = create_cd_newstate (dfa, nodes, context, hash);
-  if (BE (new_state == NULL, 0))
+  if (__glibc_unlikely (new_state == NULL))
     *err = REG_ESPACE;
 
   return new_state;
@@ -1572,7 +1578,7 @@ register_state (const re_dfa_t *dfa, re_dfastate_t *newstate,
 
   newstate->hash = hash;
   err = re_node_set_alloc (&newstate->non_eps_nodes, newstate->nodes.nelem);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     return REG_ESPACE;
   for (i = 0; i < newstate->nodes.nelem; i++)
     {
@@ -1583,12 +1589,12 @@ register_state (const re_dfa_t *dfa, re_dfastate_t *newstate,
     }
 
   spot = dfa->state_table + (hash & dfa->state_hash_mask);
-  if (BE (spot->alloc <= spot->num, 0))
+  if (__glibc_unlikely (spot->alloc <= spot->num))
     {
       Idx new_alloc = 2 * spot->num + 2;
       re_dfastate_t **new_array = re_realloc (spot->array, re_dfastate_t *,
 					      new_alloc);
-      if (BE (new_array == NULL, 0))
+      if (__glibc_unlikely (new_array == NULL))
 	return REG_ESPACE;
       spot->array = new_array;
       spot->alloc = new_alloc;
@@ -1626,10 +1632,10 @@ create_ci_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
   re_dfastate_t *newstate;
 
   newstate = (re_dfastate_t *) calloc (sizeof (re_dfastate_t), 1);
-  if (BE (newstate == NULL, 0))
+  if (__glibc_unlikely (newstate == NULL))
     return NULL;
   err = re_node_set_init_copy (&newstate->nodes, nodes);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     {
       re_free (newstate);
       return NULL;
@@ -1655,7 +1661,7 @@ create_ci_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
 	newstate->has_constraint = 1;
     }
   err = register_state (dfa, newstate, hash);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     {
       free_state (newstate);
       newstate = NULL;
@@ -1676,10 +1682,10 @@ create_cd_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
   re_dfastate_t *newstate;
 
   newstate = (re_dfastate_t *) calloc (sizeof (re_dfastate_t), 1);
-  if (BE (newstate == NULL, 0))
+  if (__glibc_unlikely (newstate == NULL))
     return NULL;
   err = re_node_set_init_copy (&newstate->nodes, nodes);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     {
       re_free (newstate);
       return NULL;
@@ -1711,7 +1717,7 @@ create_cd_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
 	  if (newstate->entrance_nodes == &newstate->nodes)
 	    {
 	      newstate->entrance_nodes = re_malloc (re_node_set, 1);
-	      if (BE (newstate->entrance_nodes == NULL, 0))
+	      if (__glibc_unlikely (newstate->entrance_nodes == NULL))
 		{
 		  free_state (newstate);
 		  return NULL;
@@ -1731,7 +1737,7 @@ create_cd_newstate (const re_dfa_t *dfa, const re_node_set *nodes,
 	}
     }
   err = register_state (dfa, newstate, hash);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     {
       free_state (newstate);
       newstate = NULL;
diff --git a/posix/regex_internal.h b/posix/regex_internal.h
index c7880667dd..de4bcbdc2d 100644
--- a/posix/regex_internal.h
+++ b/posix/regex_internal.h
@@ -132,8 +132,6 @@
 # define RE_ENABLE_I18N
 #endif
 
-#define BE(expr, val) __builtin_expect (expr, val)
-
 /* Number of ASCII characters.  */
 #define ASCII_CHARS 0x80
 
diff --git a/posix/regexec.c b/posix/regexec.c
index 73644c2341..c3e6a5b8cb 100644
--- a/posix/regexec.c
+++ b/posix/regexec.c
@@ -328,9 +328,8 @@ re_search_2_stub (struct re_pattern_buffer *bufp, const char *string1,
   Idx len;
   char *s = NULL;
 
-  if (BE ((length1 < 0 || length2 < 0 || stop < 0
-           || INT_ADD_WRAPV (length1, length2, &len)),
-          0))
+  if (__glibc_unlikely ((length1 < 0 || length2 < 0 || stop < 0
+			 || INT_ADD_WRAPV (length1, length2, &len))))
     return -2;
 
   /* Concatenate the strings.  */
@@ -339,7 +338,7 @@ re_search_2_stub (struct re_pattern_buffer *bufp, const char *string1,
       {
 	s = re_malloc (char, len);
 
-	if (BE (s == NULL, 0))
+	if (__glibc_unlikely (s == NULL))
 	  return -2;
 #ifdef _LIBC
 	memcpy (__mempcpy (s, string1, length1), string2, length2);
@@ -379,11 +378,13 @@ re_search_stub (struct re_pattern_buffer *bufp, const char *string, Idx length,
   Idx last_start = start + range;
 
   /* Check for out-of-range.  */
-  if (BE (start < 0 || start > length, 0))
+  if (__glibc_unlikely (start < 0 || start > length))
     return -1;
-  if (BE (length < last_start || (0 <= range && last_start < start), 0))
+  if (__glibc_unlikely (length < last_start
+			|| (0 <= range && last_start < start)))
     last_start = length;
-  else if (BE (last_start < 0 || (range < 0 && start <= last_start), 0))
+  else if (__glibc_unlikely (last_start < 0
+			     || (range < 0 && start <= last_start)))
     last_start = 0;
 
   lock_lock (dfa->lock);
@@ -395,17 +396,17 @@ re_search_stub (struct re_pattern_buffer *bufp, const char *string, Idx length,
   if (start < last_start && bufp->fastmap != NULL && !bufp->fastmap_accurate)
     re_compile_fastmap (bufp);
 
-  if (BE (bufp->no_sub, 0))
+  if (__glibc_unlikely (bufp->no_sub))
     regs = NULL;
 
   /* We need at least 1 register.  */
   if (regs == NULL)
     nregs = 1;
-  else if (BE (bufp->regs_allocated == REGS_FIXED
-	       && regs->num_regs <= bufp->re_nsub, 0))
+  else if (__glibc_unlikely (bufp->regs_allocated == REGS_FIXED
+			     && regs->num_regs <= bufp->re_nsub))
     {
       nregs = regs->num_regs;
-      if (BE (nregs < 1, 0))
+      if (__glibc_unlikely (nregs < 1))
 	{
 	  /* Nothing can be copied to regs.  */
 	  regs = NULL;
@@ -415,7 +416,7 @@ re_search_stub (struct re_pattern_buffer *bufp, const char *string, Idx length,
   else
     nregs = bufp->re_nsub + 1;
   pmatch = re_malloc (regmatch_t, nregs);
-  if (BE (pmatch == NULL, 0))
+  if (__glibc_unlikely (pmatch == NULL))
     {
       rval = -2;
       goto out;
@@ -434,11 +435,11 @@ re_search_stub (struct re_pattern_buffer *bufp, const char *string, Idx length,
       /* If caller wants register contents data back, copy them.  */
       bufp->regs_allocated = re_copy_regs (regs, pmatch, nregs,
 					   bufp->regs_allocated);
-      if (BE (bufp->regs_allocated == REGS_UNALLOCATED, 0))
+      if (__glibc_unlikely (bufp->regs_allocated == REGS_UNALLOCATED))
 	rval = -2;
     }
 
-  if (BE (rval == 0, 1))
+  if (__glibc_likely (rval == 0))
     {
       if (ret_len)
 	{
@@ -468,10 +469,10 @@ re_copy_regs (struct re_registers *regs, regmatch_t *pmatch, Idx nregs,
   if (regs_allocated == REGS_UNALLOCATED)
     { /* No.  So allocate them with malloc.  */
       regs->start = re_malloc (regoff_t, need_regs);
-      if (BE (regs->start == NULL, 0))
+      if (__glibc_unlikely (regs->start == NULL))
 	return REGS_UNALLOCATED;
       regs->end = re_malloc (regoff_t, need_regs);
-      if (BE (regs->end == NULL, 0))
+      if (__glibc_unlikely (regs->end == NULL))
 	{
 	  re_free (regs->start);
 	  return REGS_UNALLOCATED;
@@ -482,14 +483,14 @@ re_copy_regs (struct re_registers *regs, regmatch_t *pmatch, Idx nregs,
     { /* Yes.  If we need more elements than were already
 	 allocated, reallocate them.  If we need fewer, just
 	 leave it alone.  */
-      if (BE (need_regs > regs->num_regs, 0))
+      if (__glibc_unlikely (need_regs > regs->num_regs))
 	{
 	  regoff_t *new_start = re_realloc (regs->start, regoff_t, need_regs);
 	  regoff_t *new_end;
-	  if (BE (new_start == NULL, 0))
+	  if (__glibc_unlikely (new_start == NULL))
 	    return REGS_UNALLOCATED;
 	  new_end = re_realloc (regs->end, regoff_t, need_regs);
-	  if (BE (new_end == NULL, 0))
+	  if (__glibc_unlikely (new_end == NULL))
 	    {
 	      re_free (new_start);
 	      return REGS_UNALLOCATED;
@@ -615,9 +616,10 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
   nmatch -= extra_nmatch;
 
   /* Check if the DFA haven't been compiled.  */
-  if (BE (preg->used == 0 || dfa->init_state == NULL
-	  || dfa->init_state_word == NULL || dfa->init_state_nl == NULL
-	  || dfa->init_state_begbuf == NULL, 0))
+  if (__glibc_unlikely (preg->used == 0 || dfa->init_state == NULL
+			|| dfa->init_state_word == NULL
+			|| dfa->init_state_nl == NULL
+			|| dfa->init_state_begbuf == NULL))
     return REG_NOMATCH;
 
 #ifdef DEBUG
@@ -644,14 +646,14 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
   err = re_string_allocate (&mctx.input, string, length, dfa->nodes_len + 1,
 			    preg->translate, (preg->syntax & RE_ICASE) != 0,
 			    dfa);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     goto free_return;
   mctx.input.stop = stop;
   mctx.input.raw_stop = stop;
   mctx.input.newline_anchor = preg->newline_anchor;
 
   err = match_ctx_init (&mctx, eflags, dfa->nbackref * 2);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     goto free_return;
 
   /* We will log all the DFA states through which the dfa pass,
@@ -661,15 +663,15 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
   if (nmatch > 1 || dfa->has_mb_node)
     {
       /* Avoid overflow.  */
-      if (BE ((MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *))
-               <= mctx.input.bufs_len), 0))
+      if (__glibc_unlikely ((MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *))
+			     <= mctx.input.bufs_len)))
 	{
 	  err = REG_ESPACE;
 	  goto free_return;
 	}
 
       mctx.state_log = re_malloc (re_dfastate_t *, mctx.input.bufs_len + 1);
-      if (BE (mctx.state_log == NULL, 0))
+      if (__glibc_unlikely (mctx.state_log == NULL))
 	{
 	  err = REG_ESPACE;
 	  goto free_return;
@@ -713,19 +715,19 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
 
 	case 7:
 	  /* Fastmap with single-byte translation, match forward.  */
-	  while (BE (match_first < right_lim, 1)
+	  while (__glibc_likely (match_first < right_lim)
 		 && !fastmap[t[(unsigned char) string[match_first]]])
 	    ++match_first;
 	  goto forward_match_found_start_or_reached_end;
 
 	case 6:
 	  /* Fastmap without translation, match forward.  */
-	  while (BE (match_first < right_lim, 1)
+	  while (__glibc_likely (match_first < right_lim)
 		 && !fastmap[(unsigned char) string[match_first]])
 	    ++match_first;
 
 	forward_match_found_start_or_reached_end:
-	  if (BE (match_first == right_lim, 0))
+	  if (__glibc_unlikely (match_first == right_lim))
 	    {
 	      ch = match_first >= length
 		       ? 0 : (unsigned char) string[match_first];
@@ -758,11 +760,12 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
 	      /* If MATCH_FIRST is out of the valid range, reconstruct the
 		 buffers.  */
 	      __re_size_t offset = match_first - mctx.input.raw_mbs_idx;
-	      if (BE (offset >= (__re_size_t) mctx.input.valid_raw_len, 0))
+	      if (__glibc_unlikely (offset
+				    >= (__re_size_t) mctx.input.valid_raw_len))
 		{
 		  err = re_string_reconstruct (&mctx.input, match_first,
 					       eflags);
-		  if (BE (err != REG_NOERROR, 0))
+		  if (__glibc_unlikely (err != REG_NOERROR))
 		    goto free_return;
 
 		  offset = match_first - mctx.input.raw_mbs_idx;
@@ -786,7 +789,7 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
       /* Reconstruct the buffers so that the matcher can assume that
 	 the matching starts from the beginning of the buffer.  */
       err = re_string_reconstruct (&mctx.input, match_first, eflags);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	goto free_return;
 
 #ifdef RE_ENABLE_I18N
@@ -803,7 +806,7 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
 				   start <= last_start ? &match_first : NULL);
       if (match_last != -1)
 	{
-	  if (BE (match_last == -2, 0))
+	  if (__glibc_unlikely (match_last == -2))
 	    {
 	      err = REG_ESPACE;
 	      goto free_return;
@@ -823,7 +826,7 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
 		  err = prune_impossible_nodes (&mctx);
 		  if (err == REG_NOERROR)
 		    break;
-		  if (BE (err != REG_NOMATCH, 0))
+		  if (__glibc_unlikely (err != REG_NOMATCH))
 		    goto free_return;
 		  match_last = -1;
 		}
@@ -860,7 +863,7 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
 	{
 	  err = set_regs (preg, &mctx, nmatch, pmatch,
 			  dfa->has_plural_match && dfa->nbackref > 0);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    goto free_return;
 	}
 
@@ -871,7 +874,7 @@ re_search_internal (const regex_t *preg, const char *string, Idx length,
 	if (pmatch[reg_idx].rm_so != -1)
 	  {
 #ifdef RE_ENABLE_I18N
-	    if (BE (mctx.input.offsets_needed != 0, 0))
+	    if (__glibc_unlikely (mctx.input.offsets_needed != 0))
 	      {
 		pmatch[reg_idx].rm_so =
 		  (pmatch[reg_idx].rm_so == mctx.input.valid_len
@@ -930,11 +933,12 @@ prune_impossible_nodes (re_match_context_t *mctx)
   halt_node = mctx->last_node;
 
   /* Avoid overflow.  */
-  if (BE (MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *)) <= match_last, 0))
+  if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *))
+			<= match_last))
     return REG_ESPACE;
 
   sifted_states = re_malloc (re_dfastate_t *, match_last + 1);
-  if (BE (sifted_states == NULL, 0))
+  if (__glibc_unlikely (sifted_states == NULL))
     {
       ret = REG_ESPACE;
       goto free_return;
@@ -942,7 +946,7 @@ prune_impossible_nodes (re_match_context_t *mctx)
   if (dfa->nbackref)
     {
       lim_states = re_malloc (re_dfastate_t *, match_last + 1);
-      if (BE (lim_states == NULL, 0))
+      if (__glibc_unlikely (lim_states == NULL))
 	{
 	  ret = REG_ESPACE;
 	  goto free_return;
@@ -955,7 +959,7 @@ prune_impossible_nodes (re_match_context_t *mctx)
 			 match_last);
 	  ret = sift_states_backward (mctx, &sctx);
 	  re_node_set_free (&sctx.limits);
-	  if (BE (ret != REG_NOERROR, 0))
+	  if (__glibc_unlikely (ret != REG_NOERROR))
 	      goto free_return;
 	  if (sifted_states[0] != NULL || lim_states[0] != NULL)
 	    break;
@@ -977,7 +981,7 @@ prune_impossible_nodes (re_match_context_t *mctx)
 			       match_last + 1);
       re_free (lim_states);
       lim_states = NULL;
-      if (BE (ret != REG_NOERROR, 0))
+      if (__glibc_unlikely (ret != REG_NOERROR))
 	goto free_return;
     }
   else
@@ -985,7 +989,7 @@ prune_impossible_nodes (re_match_context_t *mctx)
       sift_ctx_init (&sctx, sifted_states, lim_states, halt_node, match_last);
       ret = sift_states_backward (mctx, &sctx);
       re_node_set_free (&sctx.limits);
-      if (BE (ret != REG_NOERROR, 0))
+      if (__glibc_unlikely (ret != REG_NOERROR))
 	goto free_return;
       if (sifted_states[0] == NULL)
 	{
@@ -1068,7 +1072,7 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
   err = REG_NOERROR;
   cur_state = acquire_init_state_context (&err, mctx, cur_str_idx);
   /* An initial state must not be NULL (invalid).  */
-  if (BE (cur_state == NULL, 0))
+  if (__glibc_unlikely (cur_state == NULL))
     {
       assert (err == REG_ESPACE);
       return -2;
@@ -1080,24 +1084,24 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
 
       /* Check OP_OPEN_SUBEXP in the initial state in case that we use them
 	 later.  E.g. Processing back references.  */
-      if (BE (dfa->nbackref, 0))
+      if (__glibc_unlikely (dfa->nbackref))
 	{
 	  at_init_state = false;
 	  err = check_subexp_matching_top (mctx, &cur_state->nodes, 0);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 
 	  if (cur_state->has_backref)
 	    {
 	      err = transit_state_bkref (mctx, &cur_state->nodes);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		return err;
 	    }
 	}
     }
 
   /* If the RE accepts NULL string.  */
-  if (BE (cur_state->halt, 0))
+  if (__glibc_unlikely (cur_state->halt))
     {
       if (!cur_state->has_constraint
 	  || check_halt_state_context (mctx, cur_state, cur_str_idx))
@@ -1117,13 +1121,13 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
       re_dfastate_t *old_state = cur_state;
       Idx next_char_idx = re_string_cur_idx (&mctx->input) + 1;
 
-      if ((BE (next_char_idx >= mctx->input.bufs_len, 0)
+      if ((__glibc_unlikely (next_char_idx >= mctx->input.bufs_len)
 	   && mctx->input.bufs_len < mctx->input.len)
-	  || (BE (next_char_idx >= mctx->input.valid_len, 0)
+	  || (__glibc_unlikely (next_char_idx >= mctx->input.valid_len)
 	      && mctx->input.valid_len < mctx->input.len))
 	{
 	  err = extend_buffers (mctx, next_char_idx + 1);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    {
 	      assert (err == REG_ESPACE);
 	      return -2;
@@ -1139,7 +1143,7 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
 	  /* Reached the invalid state or an error.  Try to recover a valid
 	     state using the state log, if available and if we have not
 	     already found a valid (even if not the longest) match.  */
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return -2;
 
 	  if (mctx->state_log == NULL
@@ -1148,7 +1152,7 @@ check_matching (re_match_context_t *mctx, bool fl_longest_match,
 	    break;
 	}
 
-      if (BE (at_init_state, 0))
+      if (__glibc_unlikely (at_init_state))
 	{
 	  if (old_state == cur_state)
 	    next_start_idx = next_char_idx;
@@ -1237,7 +1241,7 @@ proceed_next_node (const re_match_context_t *mctx, Idx nregs, regmatch_t *regs,
       re_node_set *edests = &dfa->edests[node];
       Idx dest_node;
       ok = re_node_set_insert (eps_via_nodes, node);
-      if (BE (! ok, 0))
+      if (__glibc_unlikely (! ok))
 	return -2;
       /* Pick up a valid destination, or return -1 if none
 	 is found.  */
@@ -1299,7 +1303,7 @@ proceed_next_node (const re_match_context_t *mctx, Idx nregs, regmatch_t *regs,
 	    {
 	      Idx dest_node;
 	      ok = re_node_set_insert (eps_via_nodes, node);
-	      if (BE (! ok, 0))
+	      if (__glibc_unlikely (! ok))
 		return -2;
 	      dest_node = dfa->edests[node].elems[0];
 	      if (re_node_set_contains (&mctx->state_log[*pidx]->nodes,
@@ -1449,9 +1453,9 @@ set_regs (const regex_t *preg, const re_match_context_t *mctx, size_t nmatch,
       cur_node = proceed_next_node (mctx, nmatch, pmatch, &idx, cur_node,
 				    &eps_via_nodes, fs);
 
-      if (BE (cur_node < 0, 0))
+      if (__glibc_unlikely (cur_node < 0))
 	{
-	  if (BE (cur_node == -2, 0))
+	  if (__glibc_unlikely (cur_node == -2))
 	    {
 	      re_node_set_free (&eps_via_nodes);
 	      if (prev_idx_match_malloced)
@@ -1579,10 +1583,10 @@ sift_states_backward (const re_match_context_t *mctx, re_sift_context_t *sctx)
   /* Build sifted state_log[str_idx].  It has the nodes which can epsilon
      transit to the last_node and the last_node itself.  */
   err = re_node_set_init_1 (&cur_dest, sctx->last_node);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     return err;
   err = update_cur_sifted_state (mctx, sctx, str_idx, &cur_dest);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     goto free_return;
 
   /* Then check each states in the state_log.  */
@@ -1603,7 +1607,7 @@ sift_states_backward (const re_match_context_t *mctx, re_sift_context_t *sctx)
       if (mctx->state_log[str_idx])
 	{
 	  err = build_sifted_states (mctx, sctx, str_idx, &cur_dest);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    goto free_return;
 	}
 
@@ -1612,7 +1616,7 @@ sift_states_backward (const re_match_context_t *mctx, re_sift_context_t *sctx)
 	 - It is in CUR_SRC.
 	 And update state_log.  */
       err = update_cur_sifted_state (mctx, sctx, str_idx, &cur_dest);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	goto free_return;
     }
   err = REG_NOERROR;
@@ -1674,7 +1678,7 @@ build_sifted_states (const re_match_context_t *mctx, re_sift_context_t *sctx,
 	    continue;
 	}
       ok = re_node_set_insert (cur_dest, prev_node);
-      if (BE (! ok, 0))
+      if (__glibc_unlikely (! ok))
 	return REG_ESPACE;
     }
 
@@ -1695,7 +1699,7 @@ clean_state_log_if_needed (re_match_context_t *mctx, Idx next_state_log_idx)
     {
       reg_errcode_t err;
       err = extend_buffers (mctx, next_state_log_idx + 1);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return err;
     }
 
@@ -1723,11 +1727,11 @@ merge_state_array (const re_dfa_t *dfa, re_dfastate_t **dst,
 	  re_node_set merged_set;
 	  err = re_node_set_init_union (&merged_set, &dst[st_idx]->nodes,
 					&src[st_idx]->nodes);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 	  dst[st_idx] = re_acquire_state (&err, dfa, &merged_set);
 	  re_node_set_free (&merged_set);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 	}
     }
@@ -1754,7 +1758,7 @@ update_cur_sifted_state (const re_match_context_t *mctx,
 	  /* At first, add the nodes which can epsilon transit to a node in
 	     DEST_NODE.  */
 	  err = add_epsilon_src_nodes (dfa, dest_nodes, candidates);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 
 	  /* Then, check the limitations in the current sift_context.  */
@@ -1762,20 +1766,20 @@ update_cur_sifted_state (const re_match_context_t *mctx,
 	    {
 	      err = check_subexp_limits (dfa, dest_nodes, candidates, &sctx->limits,
 					 mctx->bkref_ents, str_idx);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		return err;
 	    }
 	}
 
       sctx->sifted_states[str_idx] = re_acquire_state (&err, dfa, dest_nodes);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return err;
     }
 
   if (candidates && mctx->state_log[str_idx]->has_backref)
     {
       err = sift_states_bkref (mctx, sctx, str_idx, candidates);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return err;
     }
   return REG_NOERROR;
@@ -1790,19 +1794,19 @@ add_epsilon_src_nodes (const re_dfa_t *dfa, re_node_set *dest_nodes,
   Idx i;
 
   re_dfastate_t *state = re_acquire_state (&err, dfa, dest_nodes);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     return err;
 
   if (!state->inveclosure.alloc)
     {
       err = re_node_set_alloc (&state->inveclosure, dest_nodes->nelem);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return REG_ESPACE;
       for (i = 0; i < dest_nodes->nelem; i++)
 	{
 	  err = re_node_set_merge (&state->inveclosure,
 				   dfa->inveclosures + dest_nodes->elems[i]);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return REG_ESPACE;
 	}
     }
@@ -1837,7 +1841,7 @@ sub_epsilon_src_nodes (const re_dfa_t *dfa, Idx node, re_node_set *dest_nodes,
 	      {
 		err = re_node_set_add_intersect (&except_nodes, candidates,
 						 dfa->inveclosures + cur_node);
-		if (BE (err != REG_NOERROR, 0))
+		if (__glibc_unlikely (err != REG_NOERROR))
 		  {
 		    re_node_set_free (&except_nodes);
 		    return err;
@@ -2043,7 +2047,7 @@ check_subexp_limits (const re_dfa_t *dfa, re_node_set *dest_nodes,
 	    {
 	      err = sub_epsilon_src_nodes (dfa, ops_node, dest_nodes,
 					   candidates);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		return err;
 	    }
 
@@ -2061,7 +2065,7 @@ check_subexp_limits (const re_dfa_t *dfa, re_node_set *dest_nodes,
 		       Remove it form the current sifted state.  */
 		    err = sub_epsilon_src_nodes (dfa, node, dest_nodes,
 						 candidates);
-		    if (BE (err != REG_NOERROR, 0))
+		    if (__glibc_unlikely (err != REG_NOERROR))
 		      return err;
 		    --node_idx;
 		  }
@@ -2081,7 +2085,7 @@ check_subexp_limits (const re_dfa_t *dfa, re_node_set *dest_nodes,
 		     Remove it form the current sifted state.  */
 		  err = sub_epsilon_src_nodes (dfa, node, dest_nodes,
 					       candidates);
-		  if (BE (err != REG_NOERROR, 0))
+		  if (__glibc_unlikely (err != REG_NOERROR))
 		    return err;
 		}
 	    }
@@ -2147,27 +2151,27 @@ sift_states_bkref (const re_match_context_t *mctx, re_sift_context_t *sctx,
 	    {
 	      local_sctx = *sctx;
 	      err = re_node_set_init_copy (&local_sctx.limits, &sctx->limits);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		goto free_return;
 	    }
 	  local_sctx.last_node = node;
 	  local_sctx.last_str_idx = str_idx;
 	  ok = re_node_set_insert (&local_sctx.limits, enabled_idx);
-	  if (BE (! ok, 0))
+	  if (__glibc_unlikely (! ok))
 	    {
 	      err = REG_ESPACE;
 	      goto free_return;
 	    }
 	  cur_state = local_sctx.sifted_states[str_idx];
 	  err = sift_states_backward (mctx, &local_sctx);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    goto free_return;
 	  if (sctx->limited_states != NULL)
 	    {
 	      err = merge_state_array (dfa, sctx->limited_states,
 				       local_sctx.sifted_states,
 				       str_idx + 1);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		goto free_return;
 	    }
 	  local_sctx.sifted_states[str_idx] = cur_state;
@@ -2229,10 +2233,10 @@ transit_state (reg_errcode_t *err, re_match_context_t *mctx,
 
 #ifdef RE_ENABLE_I18N
   /* If the current state can accept multibyte.  */
-  if (BE (state->accept_mb, 0))
+  if (__glibc_unlikely (state->accept_mb))
     {
       *err = transit_state_mb (mctx, state);
-      if (BE (*err != REG_NOERROR, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR))
 	return NULL;
     }
 #endif /* RE_ENABLE_I18N */
@@ -2249,11 +2253,11 @@ transit_state (reg_errcode_t *err, re_match_context_t *mctx,
   for (;;)
     {
       trtable = state->trtable;
-      if (BE (trtable != NULL, 1))
+      if (__glibc_likely (trtable != NULL))
 	return trtable[ch];
 
       trtable = state->word_trtable;
-      if (BE (trtable != NULL, 1))
+      if (__glibc_likely (trtable != NULL))
 	{
 	  unsigned int context;
 	  context
@@ -2309,7 +2313,7 @@ merge_state_with_log (reg_errcode_t *err, re_match_context_t *mctx,
 	  table_nodes = next_state->entrance_nodes;
 	  *err = re_node_set_init_union (&next_nodes, table_nodes,
 					     log_nodes);
-	  if (BE (*err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (*err != REG_NOERROR))
 	    return NULL;
 	}
       else
@@ -2329,21 +2333,21 @@ merge_state_with_log (reg_errcode_t *err, re_match_context_t *mctx,
 	re_node_set_free (&next_nodes);
     }
 
-  if (BE (dfa->nbackref, 0) && next_state != NULL)
+  if (__glibc_unlikely (dfa->nbackref) && next_state != NULL)
     {
       /* Check OP_OPEN_SUBEXP in the current state in case that we use them
 	 later.  We must check them here, since the back references in the
 	 next state might use them.  */
       *err = check_subexp_matching_top (mctx, &next_state->nodes,
 					cur_idx);
-      if (BE (*err != REG_NOERROR, 0))
+      if (__glibc_unlikely (*err != REG_NOERROR))
 	return NULL;
 
       /* If the next state has back references.  */
       if (next_state->has_backref)
 	{
 	  *err = transit_state_bkref (mctx, &next_state->nodes);
-	  if (BE (*err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (*err != REG_NOERROR))
 	    return NULL;
 	  next_state = mctx->state_log[cur_idx];
 	}
@@ -2407,7 +2411,7 @@ check_subexp_matching_top (re_match_context_t *mctx, re_node_set *cur_nodes,
 	      & ((bitset_word_t) 1 << dfa->nodes[node].opr.idx)))
 	{
 	  err = match_ctx_add_subtop (mctx, node, str_idx);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 	}
     }
@@ -2429,7 +2433,7 @@ transit_state_sb (reg_errcode_t *err, re_match_context_t *mctx,
   unsigned int context;
 
   *err = re_node_set_alloc (&next_nodes, state->nodes.nelem + 1);
-  if (BE (*err != REG_NOERROR, 0))
+  if (__glibc_unlikely (*err != REG_NOERROR))
     return NULL;
   for (node_cnt = 0; node_cnt < state->nodes.nelem; ++node_cnt)
     {
@@ -2438,7 +2442,7 @@ transit_state_sb (reg_errcode_t *err, re_match_context_t *mctx,
 	{
 	  *err = re_node_set_merge (&next_nodes,
 				    dfa->eclosures + dfa->nexts[cur_node]);
-	  if (BE (*err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (*err != REG_NOERROR))
 	    {
 	      re_node_set_free (&next_nodes);
 	      return NULL;
@@ -2497,7 +2501,7 @@ transit_state_mb (re_match_context_t *mctx, re_dfastate_t *pstate)
       mctx->max_mb_elem_len = ((mctx->max_mb_elem_len < naccepted) ? naccepted
 			       : mctx->max_mb_elem_len);
       err = clean_state_log_if_needed (mctx, dest_idx);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return err;
 #ifdef DEBUG
       assert (dfa->nexts[cur_node_idx] != -1);
@@ -2511,7 +2515,7 @@ transit_state_mb (re_match_context_t *mctx, re_dfastate_t *pstate)
 	{
 	  err = re_node_set_init_union (&dest_nodes,
 					dest_state->entrance_nodes, new_nodes);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 	}
       context = re_string_context_at (&mctx->input, dest_idx - 1,
@@ -2520,7 +2524,8 @@ transit_state_mb (re_match_context_t *mctx, re_dfastate_t *pstate)
 	= re_acquire_state_context (&err, dfa, &dest_nodes, context);
       if (dest_state != NULL)
 	re_node_set_free (&dest_nodes);
-      if (BE (mctx->state_log[dest_idx] == NULL && err != REG_NOERROR, 0))
+      if (__glibc_unlikely (mctx->state_log[dest_idx] == NULL
+			    && err != REG_NOERROR))
 	return err;
     }
   return REG_NOERROR;
@@ -2559,7 +2564,7 @@ transit_state_bkref (re_match_context_t *mctx, const re_node_set *nodes)
 	 Check the substring which the substring matched.  */
       bkc_idx = mctx->nbkref_ents;
       err = get_subexp (mctx, node_idx, cur_str_idx);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	goto free_return;
 
       /* And add the epsilon closures (which is 'new_dest_nodes') of
@@ -2592,8 +2597,8 @@ transit_state_bkref (re_match_context_t *mctx, const re_node_set *nodes)
 	      mctx->state_log[dest_str_idx]
 		= re_acquire_state_context (&err, dfa, new_dest_nodes,
 					    context);
-	      if (BE (mctx->state_log[dest_str_idx] == NULL
-		      && err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (mctx->state_log[dest_str_idx] == NULL
+				    && err != REG_NOERROR))
 		goto free_return;
 	    }
 	  else
@@ -2602,7 +2607,7 @@ transit_state_bkref (re_match_context_t *mctx, const re_node_set *nodes)
 	      err = re_node_set_init_union (&dest_nodes,
 					    dest_state->entrance_nodes,
 					    new_dest_nodes);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		{
 		  re_node_set_free (&dest_nodes);
 		  goto free_return;
@@ -2610,8 +2615,8 @@ transit_state_bkref (re_match_context_t *mctx, const re_node_set *nodes)
 	      mctx->state_log[dest_str_idx]
 		= re_acquire_state_context (&err, dfa, &dest_nodes, context);
 	      re_node_set_free (&dest_nodes);
-	      if (BE (mctx->state_log[dest_str_idx] == NULL
-		      && err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (mctx->state_log[dest_str_idx] == NULL
+				    && err != REG_NOERROR))
 		goto free_return;
 	    }
 	  /* We need to check recursively if the backreference can epsilon
@@ -2621,10 +2626,10 @@ transit_state_bkref (re_match_context_t *mctx, const re_node_set *nodes)
 	    {
 	      err = check_subexp_matching_top (mctx, new_dest_nodes,
 					       cur_str_idx);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		goto free_return;
 	      err = transit_state_bkref (mctx, new_dest_nodes);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		goto free_return;
 	    }
 	}
@@ -2685,7 +2690,8 @@ get_subexp (re_match_context_t *mctx, Idx bkref_node, Idx bkref_str_idx)
 	     at the back reference?  */
 	  if (sl_str_diff > 0)
 	    {
-	      if (BE (bkref_str_off + sl_str_diff > mctx->input.valid_len, 0))
+	      if (__glibc_unlikely (bkref_str_off + sl_str_diff
+				    > mctx->input.valid_len))
 		{
 		  /* Not enough chars for a successful match.  */
 		  if (bkref_str_off + sl_str_diff > mctx->input.len)
@@ -2694,7 +2700,7 @@ get_subexp (re_match_context_t *mctx, Idx bkref_node, Idx bkref_str_idx)
 		  err = clean_state_log_if_needed (mctx,
 						   bkref_str_off
 						   + sl_str_diff);
-		  if (BE (err != REG_NOERROR, 0))
+		  if (__glibc_unlikely (err != REG_NOERROR))
 		    return err;
 		  buf = (const char *) re_string_get_buffer (&mctx->input);
 		}
@@ -2713,7 +2719,7 @@ get_subexp (re_match_context_t *mctx, Idx bkref_node, Idx bkref_str_idx)
 
 	  if (err == REG_NOMATCH)
 	    continue;
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 	}
 
@@ -2732,14 +2738,14 @@ get_subexp (re_match_context_t *mctx, Idx bkref_node, Idx bkref_str_idx)
 	     at the back reference?  */
 	  if (sl_str_off > 0)
 	    {
-	      if (BE (bkref_str_off >= mctx->input.valid_len, 0))
+	      if (__glibc_unlikely (bkref_str_off >= mctx->input.valid_len))
 		{
 		  /* If we are at the end of the input, we cannot match.  */
 		  if (bkref_str_off >= mctx->input.len)
 		    break;
 
 		  err = extend_buffers (mctx, bkref_str_off + 1);
-		  if (BE (err != REG_NOERROR, 0))
+		  if (__glibc_unlikely (err != REG_NOERROR))
 		    return err;
 
 		  buf = (const char *) re_string_get_buffer (&mctx->input);
@@ -2770,10 +2776,10 @@ get_subexp (re_match_context_t *mctx, Idx bkref_node, Idx bkref_str_idx)
 			       OP_CLOSE_SUBEXP);
 	  if (err == REG_NOMATCH)
 	      continue;
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	      return err;
 	  sub_last = match_ctx_add_sublast (sub_top, cls_node, sl_str);
-	  if (BE (sub_last == NULL, 0))
+	  if (__glibc_unlikely (sub_last == NULL))
 	    return REG_ESPACE;
 	  err = get_subexp_sub (mctx, sub_top, sub_last, bkref_node,
 				bkref_str_idx);
@@ -2804,7 +2810,7 @@ get_subexp_sub (re_match_context_t *mctx, const re_sub_match_top_t *sub_top,
     return err;
   err = match_ctx_add_entry (mctx, bkref_node, bkref_str, sub_top->str_idx,
 			     sub_last->str_idx);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     return err;
   to_idx = bkref_str + sub_last->str_idx - sub_top->str_idx;
   return clean_state_log_if_needed (mctx, to_idx);
@@ -2854,19 +2860,19 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
 
   subexp_num = dfa->nodes[top_node].opr.idx;
   /* Extend the buffer if we need.  */
-  if (BE (path->alloc < last_str + mctx->max_mb_elem_len + 1, 0))
+  if (__glibc_unlikely (path->alloc < last_str + mctx->max_mb_elem_len + 1))
     {
       re_dfastate_t **new_array;
       Idx old_alloc = path->alloc;
       Idx incr_alloc = last_str + mctx->max_mb_elem_len + 1;
       Idx new_alloc;
-      if (BE (IDX_MAX - old_alloc < incr_alloc, 0))
+      if (__glibc_unlikely (IDX_MAX - old_alloc < incr_alloc))
 	return REG_ESPACE;
       new_alloc = old_alloc + incr_alloc;
-      if (BE (SIZE_MAX / sizeof (re_dfastate_t *) < new_alloc, 0))
+      if (__glibc_unlikely (SIZE_MAX / sizeof (re_dfastate_t *) < new_alloc))
 	return REG_ESPACE;
       new_array = re_realloc (path->array, re_dfastate_t *, new_alloc);
-      if (BE (new_array == NULL, 0))
+      if (__glibc_unlikely (new_array == NULL))
 	return REG_ESPACE;
       path->array = new_array;
       path->alloc = new_alloc;
@@ -2887,10 +2893,10 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
   if (str_idx == top_str)
     {
       err = re_node_set_init_1 (&next_nodes, top_node);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	return err;
       err = check_arrival_expand_ecl (dfa, &next_nodes, subexp_num, type);
-      if (BE (err != REG_NOERROR, 0))
+      if (__glibc_unlikely (err != REG_NOERROR))
 	{
 	  re_node_set_free (&next_nodes);
 	  return err;
@@ -2902,7 +2908,7 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
       if (cur_state && cur_state->has_backref)
 	{
 	  err = re_node_set_init_copy (&next_nodes, &cur_state->nodes);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 	}
       else
@@ -2914,14 +2920,14 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
 	{
 	  err = expand_bkref_cache (mctx, &next_nodes, str_idx,
 				    subexp_num, type);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    {
 	      re_node_set_free (&next_nodes);
 	      return err;
 	    }
 	}
       cur_state = re_acquire_state_context (&err, dfa, &next_nodes, context);
-      if (BE (cur_state == NULL && err != REG_NOERROR, 0))
+      if (__glibc_unlikely (cur_state == NULL && err != REG_NOERROR))
 	{
 	  re_node_set_free (&next_nodes);
 	  return err;
@@ -2936,7 +2942,7 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
 	{
 	  err = re_node_set_merge (&next_nodes,
 				   &mctx->state_log[str_idx + 1]->nodes);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    {
 	      re_node_set_free (&next_nodes);
 	      return err;
@@ -2947,7 +2953,7 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
 	  err = check_arrival_add_next_nodes (mctx, str_idx,
 					      &cur_state->non_eps_nodes,
 					      &next_nodes);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    {
 	      re_node_set_free (&next_nodes);
 	      return err;
@@ -2957,14 +2963,14 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
       if (next_nodes.nelem)
 	{
 	  err = check_arrival_expand_ecl (dfa, &next_nodes, subexp_num, type);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    {
 	      re_node_set_free (&next_nodes);
 	      return err;
 	    }
 	  err = expand_bkref_cache (mctx, &next_nodes, str_idx,
 				    subexp_num, type);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    {
 	      re_node_set_free (&next_nodes);
 	      return err;
@@ -2972,7 +2978,7 @@ check_arrival (re_match_context_t *mctx, state_array_t *path, Idx top_node,
 	}
       context = re_string_context_at (&mctx->input, str_idx - 1, mctx->eflags);
       cur_state = re_acquire_state_context (&err, dfa, &next_nodes, context);
-      if (BE (cur_state == NULL && err != REG_NOERROR, 0))
+      if (__glibc_unlikely (cur_state == NULL && err != REG_NOERROR))
 	{
 	  re_node_set_free (&next_nodes);
 	  return err;
@@ -3041,22 +3047,22 @@ check_arrival_add_next_nodes (re_match_context_t *mctx, Idx str_idx,
 	      if (dest_state)
 		{
 		  err = re_node_set_merge (&union_set, &dest_state->nodes);
-		  if (BE (err != REG_NOERROR, 0))
+		  if (__glibc_unlikely (err != REG_NOERROR))
 		    {
 		      re_node_set_free (&union_set);
 		      return err;
 		    }
 		}
 	      ok = re_node_set_insert (&union_set, next_node);
-	      if (BE (! ok, 0))
+	      if (__glibc_unlikely (! ok))
 		{
 		  re_node_set_free (&union_set);
 		  return REG_ESPACE;
 		}
 	      mctx->state_log[next_idx] = re_acquire_state (&err, dfa,
 							    &union_set);
-	      if (BE (mctx->state_log[next_idx] == NULL
-		      && err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (mctx->state_log[next_idx] == NULL
+				    && err != REG_NOERROR))
 		{
 		  re_node_set_free (&union_set);
 		  return err;
@@ -3068,7 +3074,7 @@ check_arrival_add_next_nodes (re_match_context_t *mctx, Idx str_idx,
 	  || check_node_accept (mctx, dfa->nodes + cur_node, str_idx))
 	{
 	  ok = re_node_set_insert (next_nodes, dfa->nexts[cur_node]);
-	  if (BE (! ok, 0))
+	  if (__glibc_unlikely (! ok))
 	    {
 	      re_node_set_free (&union_set);
 	      return REG_ESPACE;
@@ -3096,7 +3102,7 @@ check_arrival_expand_ecl (const re_dfa_t *dfa, re_node_set *cur_nodes,
   assert (cur_nodes->nelem);
 #endif
   err = re_node_set_alloc (&new_nodes, cur_nodes->nelem);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     return err;
   /* Create a new node set NEW_NODES with the nodes which are epsilon
      closures of the node in CUR_NODES.  */
@@ -3110,7 +3116,7 @@ check_arrival_expand_ecl (const re_dfa_t *dfa, re_node_set *cur_nodes,
 	{
 	  /* There are no problematic nodes, just merge them.  */
 	  err = re_node_set_merge (&new_nodes, eclosure);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    {
 	      re_node_set_free (&new_nodes);
 	      return err;
@@ -3121,7 +3127,7 @@ check_arrival_expand_ecl (const re_dfa_t *dfa, re_node_set *cur_nodes,
 	  /* There are problematic nodes, re-calculate incrementally.  */
 	  err = check_arrival_expand_ecl_sub (dfa, &new_nodes, cur_node,
 					      ex_subexp, type);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    {
 	      re_node_set_free (&new_nodes);
 	      return err;
@@ -3153,13 +3159,13 @@ check_arrival_expand_ecl_sub (const re_dfa_t *dfa, re_node_set *dst_nodes,
 	  if (type == OP_CLOSE_SUBEXP)
 	    {
 	      ok = re_node_set_insert (dst_nodes, cur_node);
-	      if (BE (! ok, 0))
+	      if (__glibc_unlikely (! ok))
 		return REG_ESPACE;
 	    }
 	  break;
 	}
       ok = re_node_set_insert (dst_nodes, cur_node);
-      if (BE (! ok, 0))
+      if (__glibc_unlikely (! ok))
 	return REG_ESPACE;
       if (dfa->edests[cur_node].nelem == 0)
 	break;
@@ -3169,7 +3175,7 @@ check_arrival_expand_ecl_sub (const re_dfa_t *dfa, re_node_set *dst_nodes,
 	  err = check_arrival_expand_ecl_sub (dfa, dst_nodes,
 					      dfa->edests[cur_node].elems[1],
 					      ex_subexp, type);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    return err;
 	}
       cur_node = dfa->edests[cur_node].elems[0];
@@ -3221,8 +3227,8 @@ expand_bkref_cache (re_match_context_t *mctx, re_node_set *cur_nodes,
 	  err2 = check_arrival_expand_ecl (dfa, &new_dests, subexp_num, type);
 	  err3 = re_node_set_merge (cur_nodes, &new_dests);
 	  re_node_set_free (&new_dests);
-	  if (BE (err != REG_NOERROR || err2 != REG_NOERROR
-		  || err3 != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR || err2 != REG_NOERROR
+				|| err3 != REG_NOERROR))
 	    {
 	      err = (err != REG_NOERROR ? err
 		     : (err2 != REG_NOERROR ? err2 : err3));
@@ -3244,7 +3250,7 @@ expand_bkref_cache (re_match_context_t *mctx, re_node_set *cur_nodes,
 	      err = re_node_set_init_copy (&union_set,
 					   &mctx->state_log[to_idx]->nodes);
 	      ok = re_node_set_insert (&union_set, next_node);
-	      if (BE (err != REG_NOERROR || ! ok, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR || ! ok))
 		{
 		  re_node_set_free (&union_set);
 		  err = err != REG_NOERROR ? err : REG_ESPACE;
@@ -3254,13 +3260,13 @@ expand_bkref_cache (re_match_context_t *mctx, re_node_set *cur_nodes,
 	  else
 	    {
 	      err = re_node_set_init_1 (&union_set, next_node);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		return err;
 	    }
 	  mctx->state_log[to_idx] = re_acquire_state (&err, dfa, &union_set);
 	  re_node_set_free (&union_set);
-	  if (BE (mctx->state_log[to_idx] == NULL
-		  && err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (mctx->state_log[to_idx] == NULL
+				&& err != REG_NOERROR))
 	    return err;
 	}
     }
@@ -3303,7 +3309,7 @@ build_trtable (const re_dfa_t *dfa, re_dfastate_t *state)
   else
     {
       dests_alloc = re_malloc (struct dests_alloc, 1);
-      if (BE (dests_alloc == NULL, 0))
+      if (__glibc_unlikely (dests_alloc == NULL))
 	return false;
       dests_node_malloced = true;
     }
@@ -3316,7 +3322,7 @@ build_trtable (const re_dfa_t *dfa, re_dfastate_t *state)
   /* At first, group all nodes belonging to 'state' into several
      destinations.  */
   ndests = group_nodes_into_DFAstates (dfa, state, dests_node, dests_ch);
-  if (BE (ndests <= 0, 0))
+  if (__glibc_unlikely (ndests <= 0))
     {
       if (dests_node_malloced)
 	re_free (dests_alloc);
@@ -3325,7 +3331,7 @@ build_trtable (const re_dfa_t *dfa, re_dfastate_t *state)
 	{
 	  state->trtable = (re_dfastate_t **)
 	    calloc (sizeof (re_dfastate_t *), SBC_MAX);
-          if (BE (state->trtable == NULL, 0))
+          if (__glibc_unlikely (state->trtable == NULL))
             return false;
 	  return true;
 	}
@@ -3333,14 +3339,14 @@ build_trtable (const re_dfa_t *dfa, re_dfastate_t *state)
     }
 
   err = re_node_set_alloc (&follows, ndests + 1);
-  if (BE (err != REG_NOERROR, 0))
+  if (__glibc_unlikely (err != REG_NOERROR))
     goto out_free;
 
   /* Avoid arithmetic overflow in size calculation.  */
-  if (BE ((((SIZE_MAX - (sizeof (re_node_set) + sizeof (bitset_t)) * SBC_MAX)
-	    / (3 * sizeof (re_dfastate_t *)))
-	   < ndests),
-	  0))
+  size_t ndests_max
+    = ((SIZE_MAX - (sizeof (re_node_set) + sizeof (bitset_t)) * SBC_MAX)
+       / (3 * sizeof (re_dfastate_t *)));
+  if (__glibc_unlikely (ndests_max < ndests))
     goto out_free;
 
   if (__libc_use_alloca ((sizeof (re_node_set) + sizeof (bitset_t)) * SBC_MAX
@@ -3350,7 +3356,7 @@ build_trtable (const re_dfa_t *dfa, re_dfastate_t *state)
   else
     {
       dest_states = re_malloc (re_dfastate_t *, ndests * 3);
-      if (BE (dest_states == NULL, 0))
+      if (__glibc_unlikely (dest_states == NULL))
 	{
 out_free:
 	  if (dest_states_malloced)
@@ -3380,12 +3386,12 @@ out_free:
 	  if (next_node != -1)
 	    {
 	      err = re_node_set_merge (&follows, dfa->eclosures + next_node);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		goto out_free;
 	    }
 	}
       dest_states[i] = re_acquire_state_context (&err, dfa, &follows, 0);
-      if (BE (dest_states[i] == NULL && err != REG_NOERROR, 0))
+      if (__glibc_unlikely (dest_states[i] == NULL && err != REG_NOERROR))
 	goto out_free;
       /* If the new state has context constraint,
 	 build appropriate states for these contexts.  */
@@ -3393,7 +3399,8 @@ out_free:
 	{
 	  dest_states_word[i] = re_acquire_state_context (&err, dfa, &follows,
 							  CONTEXT_WORD);
-	  if (BE (dest_states_word[i] == NULL && err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (dest_states_word[i] == NULL
+				&& err != REG_NOERROR))
 	    goto out_free;
 
 	  if (dest_states[i] != dest_states_word[i] && dfa->mb_cur_max > 1)
@@ -3401,7 +3408,7 @@ out_free:
 
 	  dest_states_nl[i] = re_acquire_state_context (&err, dfa, &follows,
 							CONTEXT_NEWLINE);
-	  if (BE (dest_states_nl[i] == NULL && err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (dest_states_nl[i] == NULL && err != REG_NOERROR))
 	    goto out_free;
 	}
       else
@@ -3412,7 +3419,7 @@ out_free:
       bitset_merge (acceptable, dests_ch[i]);
     }
 
-  if (!BE (need_word_trtable, 0))
+  if (!__glibc_unlikely (need_word_trtable))
     {
       /* We don't care about whether the following character is a word
 	 character, or we are in a single-byte character set so we can
@@ -3420,7 +3427,7 @@ out_free:
 	 256-entry transition table.  */
       trtable = state->trtable =
 	(re_dfastate_t **) calloc (sizeof (re_dfastate_t *), SBC_MAX);
-      if (BE (trtable == NULL, 0))
+      if (__glibc_unlikely (trtable == NULL))
 	goto out_free;
 
       /* For all characters ch...:  */
@@ -3428,7 +3435,7 @@ out_free:
 	for (ch = i * BITSET_WORD_BITS, elem = acceptable[i], mask = 1;
 	     elem;
 	     mask <<= 1, elem >>= 1, ++ch)
-	  if (BE (elem & 1, 0))
+	  if (__glibc_unlikely (elem & 1))
 	    {
 	      /* There must be exactly one destination which accepts
 		 character ch.  See group_nodes_into_DFAstates.  */
@@ -3451,7 +3458,7 @@ out_free:
 	 starting at trtable[SBC_MAX].  */
       trtable = state->word_trtable =
 	(re_dfastate_t **) calloc (sizeof (re_dfastate_t *), 2 * SBC_MAX);
-      if (BE (trtable == NULL, 0))
+      if (__glibc_unlikely (trtable == NULL))
 	goto out_free;
 
       /* For all characters ch...:  */
@@ -3459,7 +3466,7 @@ out_free:
 	for (ch = i * BITSET_WORD_BITS, elem = acceptable[i], mask = 1;
 	     elem;
 	     mask <<= 1, elem >>= 1, ++ch)
-	  if (BE (elem & 1, 0))
+	  if (__glibc_unlikely (elem & 1))
 	    {
 	      /* There must be exactly one destination which accepts
 		 character ch.  See group_nodes_into_DFAstates.  */
@@ -3658,14 +3665,14 @@ group_nodes_into_DFAstates (const re_dfa_t *dfa, const re_dfastate_t *state,
 	      bitset_copy (dests_ch[ndests], remains);
 	      bitset_copy (dests_ch[j], intersec);
 	      err = re_node_set_init_copy (dests_node + ndests, &dests_node[j]);
-	      if (BE (err != REG_NOERROR, 0))
+	      if (__glibc_unlikely (err != REG_NOERROR))
 		goto error_return;
 	      ++ndests;
 	    }
 
 	  /* Put the position in the current group. */
 	  ok = re_node_set_insert (&dests_node[j], cur_nodes->elems[i]);
-	  if (BE (! ok, 0))
+	  if (__glibc_unlikely (! ok))
 	    goto error_return;
 
 	  /* If all characters are consumed, go to next node. */
@@ -3677,7 +3684,7 @@ group_nodes_into_DFAstates (const re_dfa_t *dfa, const re_dfastate_t *state,
 	{
 	  bitset_copy (dests_ch[ndests], accepts);
 	  err = re_node_set_init_1 (dests_node + ndests, cur_nodes->elems[i]);
-	  if (BE (err != REG_NOERROR, 0))
+	  if (__glibc_unlikely (err != REG_NOERROR))
 	    goto error_return;
 	  ++ndests;
 	  bitset_empty (accepts);
@@ -3711,10 +3718,10 @@ check_node_accept_bytes (const re_dfa_t *dfa, Idx node_idx,
   int char_len, elem_len;
   Idx i;
 
-  if (BE (node->type == OP_UTF8_PERIOD, 0))
+  if (__glibc_unlikely (node->type == OP_UTF8_PERIOD))
     {
       unsigned char c = re_string_byte_at (input, str_idx), d;
-      if (BE (c < 0xc2, 1))
+      if (__glibc_likely (c < 0xc2))
 	return 0;
 
       if (str_idx + 2 > input->len)
@@ -4049,15 +4056,15 @@ extend_buffers (re_match_context_t *mctx, int min_len)
   re_string_t *pstr = &mctx->input;
 
   /* Avoid overflow.  */
-  if (BE (MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *)) / 2
-          <= pstr->bufs_len, 0))
+  if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / sizeof (re_dfastate_t *)) / 2
+			<= pstr->bufs_len))
     return REG_ESPACE;
 
   /* Double the lengths of the buffers, but allocate at least MIN_LEN.  */
   ret = re_string_realloc_buffers (pstr,
 				   MAX (min_len,
 					MIN (pstr->len, pstr->bufs_len * 2)));
-  if (BE (ret != REG_NOERROR, 0))
+  if (__glibc_unlikely (ret != REG_NOERROR))
     return ret;
 
   if (mctx->state_log != NULL)
@@ -4068,7 +4075,7 @@ extend_buffers (re_match_context_t *mctx, int min_len)
 	 does not have the right size.  */
       re_dfastate_t **new_array = re_realloc (mctx->state_log, re_dfastate_t *,
 					      pstr->bufs_len + 1);
-      if (BE (new_array == NULL, 0))
+      if (__glibc_unlikely (new_array == NULL))
 	return REG_ESPACE;
       mctx->state_log = new_array;
     }
@@ -4080,7 +4087,7 @@ extend_buffers (re_match_context_t *mctx, int min_len)
       if (pstr->mb_cur_max > 1)
 	{
 	  ret = build_wcs_upper_buffer (pstr);
-	  if (BE (ret != REG_NOERROR, 0))
+	  if (__glibc_unlikely (ret != REG_NOERROR))
 	    return ret;
 	}
       else
@@ -4119,12 +4126,12 @@ match_ctx_init (re_match_context_t *mctx, int eflags, Idx n)
       size_t max_object_size =
 	MAX (sizeof (struct re_backref_cache_entry),
 	     sizeof (re_sub_match_top_t *));
-      if (BE (MIN (IDX_MAX, SIZE_MAX / max_object_size) < n, 0))
+      if (__glibc_unlikely (MIN (IDX_MAX, SIZE_MAX / max_object_size) < n))
 	return REG_ESPACE;
 
       mctx->bkref_ents = re_malloc (struct re_backref_cache_entry, n);
       mctx->sub_tops = re_malloc (re_sub_match_top_t *, n);
-      if (BE (mctx->bkref_ents == NULL || mctx->sub_tops == NULL, 0))
+      if (__glibc_unlikely (mctx->bkref_ents == NULL || mctx->sub_tops == NULL))
 	return REG_ESPACE;
     }
   /* Already zero-ed by the caller.
@@ -4195,7 +4202,7 @@ match_ctx_add_entry (re_match_context_t *mctx, Idx node, Idx str_idx, Idx from,
       struct re_backref_cache_entry* new_entry;
       new_entry = re_realloc (mctx->bkref_ents, struct re_backref_cache_entry,
 			      mctx->abkref_ents * 2);
-      if (BE (new_entry == NULL, 0))
+      if (__glibc_unlikely (new_entry == NULL))
 	{
 	  re_free (mctx->bkref_ents);
 	  return REG_ESPACE;
@@ -4264,19 +4271,19 @@ match_ctx_add_subtop (re_match_context_t *mctx, Idx node, Idx str_idx)
   assert (mctx->sub_tops != NULL);
   assert (mctx->asub_tops > 0);
 #endif
-  if (BE (mctx->nsub_tops == mctx->asub_tops, 0))
+  if (__glibc_unlikely (mctx->nsub_tops == mctx->asub_tops))
     {
       Idx new_asub_tops = mctx->asub_tops * 2;
       re_sub_match_top_t **new_array = re_realloc (mctx->sub_tops,
 						   re_sub_match_top_t *,
 						   new_asub_tops);
-      if (BE (new_array == NULL, 0))
+      if (__glibc_unlikely (new_array == NULL))
 	return REG_ESPACE;
       mctx->sub_tops = new_array;
       mctx->asub_tops = new_asub_tops;
     }
   mctx->sub_tops[mctx->nsub_tops] = calloc (1, sizeof (re_sub_match_top_t));
-  if (BE (mctx->sub_tops[mctx->nsub_tops] == NULL, 0))
+  if (__glibc_unlikely (mctx->sub_tops[mctx->nsub_tops] == NULL))
     return REG_ESPACE;
   mctx->sub_tops[mctx->nsub_tops]->node = node;
   mctx->sub_tops[mctx->nsub_tops++]->str_idx = str_idx;
@@ -4290,19 +4297,19 @@ static re_sub_match_last_t *
 match_ctx_add_sublast (re_sub_match_top_t *subtop, Idx node, Idx str_idx)
 {
   re_sub_match_last_t *new_entry;
-  if (BE (subtop->nlasts == subtop->alasts, 0))
+  if (__glibc_unlikely (subtop->nlasts == subtop->alasts))
     {
       Idx new_alasts = 2 * subtop->alasts + 1;
       re_sub_match_last_t **new_array = re_realloc (subtop->lasts,
 						    re_sub_match_last_t *,
 						    new_alasts);
-      if (BE (new_array == NULL, 0))
+      if (__glibc_unlikely (new_array == NULL))
 	return NULL;
       subtop->lasts = new_array;
       subtop->alasts = new_alasts;
     }
   new_entry = calloc (1, sizeof (re_sub_match_last_t));
-  if (BE (new_entry != NULL, 1))
+  if (__glibc_likely (new_entry != NULL))
     {
       subtop->lasts[subtop->nlasts] = new_entry;
       new_entry->node = node;