Use libiberty hash in gas/read.c.

* read.c (struct po_entry): New.
	(hash_po_entry): Likewise.
	(eq_po_entry): Likewise.
	(po_entry_alloc): Likewise.
	(po_entry_find): Likewise.
	(pop_insert): Likewise.
	(pobegin): Use htab hash table.
	(read_a_source_file): Likewise.
	(s_macro): Likewise.
	(read_print_statistics): Likewise.
	* config/tc-m68k.c (m68k_conditional_pseudoop): Add const qualifier.
	* config/tc-m68k.h (m68k_conditional_pseudoop): Likewise.

gas/ChangeLog

@@ -1,3 +1,18 @@
+2020-08-20  Martin Liska  <mliska@suse.cz>
+
+	* read.c (struct po_entry): New.
+	(hash_po_entry): Likewise.
+	(eq_po_entry): Likewise.
+	(po_entry_alloc): Likewise.
+	(po_entry_find): Likewise.
+	(pop_insert): Likewise.
+	(pobegin): Use htab hash table.
+	(read_a_source_file): Likewise.
+	(s_macro): Likewise.
+	(read_print_statistics): Likewise.
+	* config/tc-m68k.c (m68k_conditional_pseudoop): Add const qualifier.
+	* config/tc-m68k.h (m68k_conditional_pseudoop): Likewise.
+
 2020-08-20  Martin Liska  <mliska@suse.cz>
 
 	* config/tc-iq2000.c (iq2000_add_macro): Use htab hash table.

gas/config/tc-m68k.c

@@ -5560,7 +5560,7 @@ s_proc (int ignore ATTRIBUTE_UNUSED)
    alignment is needed.  */
 
 int
-m68k_conditional_pseudoop (pseudo_typeS *pop)
+m68k_conditional_pseudoop (const pseudo_typeS *pop)
 {
   return (pop->poc_handler == s_mri_if
 	  || pop->poc_handler == s_mri_else);

gas/config/tc-m68k.h

@@ -47,7 +47,7 @@ extern const char *m68k_comment_chars;
 extern void m68k_mri_mode_change (int);
 #define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
 
-extern int m68k_conditional_pseudoop (pseudo_typeS *);
+extern int m68k_conditional_pseudoop (const pseudo_typeS *);
 #define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
 
 extern void m68k_frob_label (symbolS *);

gas/read.c

@@ -295,7 +295,53 @@ address_bytes (void)
 
 /* Set up pseudo-op tables.  */
 
-static struct hash_control *po_hash;
+struct po_entry
+{
+  const char *poc_name;
+
+  const pseudo_typeS *pop;
+};
+
+typedef struct po_entry po_entry_t;
+
+/* Hash function for a po_entry.  */
+
+static hashval_t
+hash_po_entry (const void *e)
+{
+  const po_entry_t *entry = (const po_entry_t *) e;
+  return htab_hash_string (entry->poc_name);
+}
+
+/* Equality function for a po_entry.  */
+
+static int
+eq_po_entry (const void *a, const void *b)
+{
+  const po_entry_t *ea = (const po_entry_t *) a;
+  const po_entry_t *eb = (const po_entry_t *) b;
+
+  return strcmp (ea->poc_name, eb->poc_name) == 0;
+}
+
+static po_entry_t *
+po_entry_alloc (const char *poc_name, const pseudo_typeS *pop)
+{
+  po_entry_t *entry = XNEW (po_entry_t);
+  entry->poc_name = poc_name;
+  entry->pop = pop;
+  return entry;
+}
+
+static const pseudo_typeS *
+po_entry_find (htab_t table, const char *poc_name)
+{
+  po_entry_t needle = { poc_name, NULL };
+  po_entry_t *entry = htab_find (table, &needle);
+  return entry != NULL ? entry->pop : NULL;
+}
+
+static struct htab *po_hash;
 
 static const pseudo_typeS potable[] = {
   {"abort", s_abort, 0},
@@ -514,14 +560,14 @@ static const char *pop_table_name;
 void
 pop_insert (const pseudo_typeS *table)
 {
-  const char *errtxt;
   const pseudo_typeS *pop;
   for (pop = table; pop->poc_name; pop++)
     {
-      errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
-      if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
-	as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
-		  errtxt);
+      int exists = po_entry_find (po_hash, pop->poc_name) != NULL;
+      if (!pop_override_ok && exists)
+	as_fatal (_("error constructing %s pseudo-op table"), pop_table_name);
+      else if (!exists)
+	htab_insert (po_hash, po_entry_alloc (pop->poc_name, pop));
     }
 }
 
@@ -540,7 +586,8 @@ pop_insert (const pseudo_typeS *table)
 static void
 pobegin (void)
 {
-  po_hash = hash_new ();
+  po_hash = htab_create_alloc (16, hash_po_entry, eq_po_entry, NULL,
+			       xcalloc, xfree);
 
   /* Do the target-specific pseudo ops.  */
   pop_table_name = "md";
@@ -819,7 +866,7 @@ read_a_source_file (const char *name)
   char next_char;
   char *s;		/* String of symbol, '\0' appended.  */
   long temp;
-  pseudo_typeS *pop;
+  const pseudo_typeS *pop;
 
 #ifdef WARN_COMMENTS
   found_comment = 0;
@@ -1069,7 +1116,7 @@ read_a_source_file (const char *name)
 		    {
 		      /* The MRI assembler uses pseudo-ops without
 			 a period.  */
-		      pop = (pseudo_typeS *) hash_find (po_hash, s);
+		      pop = po_entry_find (po_hash, s);
 		      if (pop != NULL && pop->poc_handler == NULL)
 			pop = NULL;
 		    }
@@ -1084,7 +1131,7 @@ read_a_source_file (const char *name)
 			 already know that the pseudo-op begins with a '.'.  */
 
 		      if (pop == NULL)
-			pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
+			pop = po_entry_find (po_hash, s + 1);
 		      if (pop && !pop->poc_handler)
 			pop = NULL;
 
@@ -2739,10 +2786,10 @@ s_macro (int ignore ATTRIBUTE_UNUSED)
 	}
 
       if (((NO_PSEUDO_DOT || flag_m68k_mri)
-	   && hash_find (po_hash, name) != NULL)
+	   && po_entry_find (po_hash, name) != NULL)
 	  || (!flag_m68k_mri
 	      && *name == '.'
-	      && hash_find (po_hash, name + 1) != NULL))
+	      && po_entry_find (po_hash, name + 1) != NULL))
 	as_warn_where (file,
 		 line,
 		 _("attempt to redefine pseudo-op `%s' ignored"),
@@ -6128,7 +6175,7 @@ s_ignore (int arg ATTRIBUTE_UNUSED)
 void
 read_print_statistics (FILE *file)
 {
-  hash_print_statistics (file, "pseudo-op table", po_hash);
+  htab_print_statistics (file, "pseudo-op table", po_hash);
 }
 
 /* Inserts the given line into the input stream.