aarch64: Drop "" from hint option hash table

An empty string is the only option where the upper and lower case forms
are identical, so this allows the upper case insertion logic to be
simplified as well.

diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 6d412651354aa872faa1baebddc54703efe1092a..373b97b15345431d5635fcc99eaac34b91fce150 100644 (file)
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -10773,15 +10773,15 @@ md_begin (void)
   for (i = 0; aarch64_hint_options[i].name != NULL; i++)
     {
       const char* name = aarch64_hint_options[i].name;
-      const char* upper_name = get_upper_str(name);
-
+      /* Empty strings represent an absent optional operand, so won't be looked
+        up in the hash table.  */
+      if (*name == '\0')
+       continue;
       checked_hash_insert (aarch64_hint_opt_hsh, name,
                           aarch64_hint_options + i);
-
-      /* Also hash the name in the upper case if not the same.  */
-      if (strcmp (name, upper_name) != 0)
-       checked_hash_insert (aarch64_hint_opt_hsh, upper_name,
-                            aarch64_hint_options + i);
+      /* Also hash the name in the upper case.  */
+      checked_hash_insert (aarch64_hint_opt_hsh, get_upper_str (name),
+                          aarch64_hint_options + i);
     }
 
   for (i = 0; aarch64_sys_ins_gic[i].name != NULL; i++)