Move lookup_name_info creation into basic_lookup_transparent_type

I noticed that basic_lookup_transparent_type calls two different
functions that both proceed to create a lookup_name_info.  It's more
efficient to create this object in the outermost layer possible.
Making this change required a few related changes, resulting in this
patch.

There are still more changes of this sort that could be made.

Regression tested on x86-64 Fedora 38.

gdb/block.c

@@ -679,17 +679,14 @@ better_symbol (struct symbol *a, struct symbol *b,
    non-encoded names tested for a match.  */
 
 struct symbol *
-block_lookup_symbol (const struct block *block, const char *name,
+block_lookup_symbol (const struct block *block, const lookup_name_info &name,
-		     symbol_name_match_type match_type,
 		     const domain_search_flags domain)
 {
-  lookup_name_info lookup_name (name, match_type);
-
   if (!block->function ())
     {
       struct symbol *other = NULL;
 
-      for (struct symbol *sym : block_iterator_range (block, &lookup_name))
+      for (struct symbol *sym : block_iterator_range (block, &name))
 	{
 	  /* See comment related to PR gcc/debug/91507 in
 	     block_lookup_symbol_primary.  */
@@ -717,7 +714,7 @@ block_lookup_symbol (const struct block *block, const char *name,
 
       struct symbol *sym_found = NULL;
 
-      for (struct symbol *sym : block_iterator_range (block, &lookup_name))
+      for (struct symbol *sym : block_iterator_range (block, &name))
 	{
 	  if (sym->matches (domain))
 	    {

gdb/block.h

@@ -565,8 +565,7 @@ extern struct symbol *better_symbol (struct symbol *a, struct symbol *b,
 /* Search BLOCK for symbol NAME in DOMAIN.  */
 
 extern struct symbol *block_lookup_symbol (const struct block *block,
-					   const char *name,
+					   const lookup_name_info &name,
-					   symbol_name_match_type match_type,
 					   const domain_search_flags domain);
 
 /* Search BLOCK for symbol NAME in DOMAIN but only in primary symbol table of

gdb/compile/compile-object-load.c

@@ -421,6 +421,10 @@ get_out_value_type (struct symbol *func_sym, struct objfile *objfile,
 
   lookup_name_info func_matcher (GCC_FE_WRAPPER_FUNCTION,
 				 symbol_name_match_type::SEARCH_NAME);
+  lookup_name_info i_val_matcher (COMPILE_I_EXPR_VAL,
+				  symbol_name_match_type::SEARCH_NAME);
+  lookup_name_info i_ptr_matcher (COMPILE_I_EXPR_PTR_TYPE,
+				  symbol_name_match_type::SEARCH_NAME);
 
   bv = func_sym->symtab ()->compunit ()->blockvector ();
   nblocks = bv->num_blocks ();
@@ -434,10 +438,7 @@ get_out_value_type (struct symbol *func_sym, struct objfile *objfile,
       block = bv->block (block_loop);
       if (block->function () != NULL)
 	continue;
-      gdb_val_sym = block_lookup_symbol (block,
+      gdb_val_sym = block_lookup_symbol (block, i_val_matcher, SEARCH_VFT);
-					 COMPILE_I_EXPR_VAL,
-					 symbol_name_match_type::SEARCH_NAME,
-					 SEARCH_VFT);
       if (gdb_val_sym == NULL)
 	continue;
 
@@ -461,9 +462,7 @@ get_out_value_type (struct symbol *func_sym, struct objfile *objfile,
   gdb_type = gdb_val_sym->type ();
   gdb_type = check_typedef (gdb_type);
 
-  gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE,
+  gdb_ptr_type_sym = block_lookup_symbol (block, i_ptr_matcher, SEARCH_VFT);
-					  symbol_name_match_type::SEARCH_NAME,
-					  SEARCH_VFT);
   if (gdb_ptr_type_sym == NULL)
     error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE);
   gdb_ptr_type = gdb_ptr_type_sym->type ();

gdb/objfiles.h

@@ -561,7 +561,8 @@ public:
      defined, or NULL if no such symbol table exists.  If OBJFILE
      contains !TYPE_OPAQUE symbol prefer its compunit.  If it contains
      only TYPE_OPAQUE symbol(s), return at least that compunit.  */
-  struct compunit_symtab *lookup_symbol (block_enum kind, const char *name,
+  struct compunit_symtab *lookup_symbol (block_enum kind,
+					 const lookup_name_info &name,
 					 domain_search_flags domain);
 
   /* See quick_symbol_functions.  */

gdb/psymtab.c

@@ -1505,8 +1505,9 @@ maintenance_check_psymtabs (const char *ignore, int from_tty)
 		      && psym->ginfo.value_address () == 0)
 		    continue;
 
-		  sym = block_lookup_symbol (b, psym->ginfo.search_name (),
+		  lookup_name_info lookup_name
-					     symbol_name_match_type::SEARCH_NAME,
+		    (psym->ginfo.search_name (), symbol_name_match_type::SEARCH_NAME);
+		  sym = block_lookup_symbol (b, lookup_name,
 					     to_search_flags (psym->domain));
 		  if (!sym)
 		    {
@@ -1520,8 +1521,9 @@ maintenance_check_psymtabs (const char *ignore, int from_tty)
 	      b = bv->global_block ();
 	      for (partial_symbol *psym : ps->global_psymbols)
 		{
-		  sym = block_lookup_symbol (b, psym->ginfo.search_name (),
+		  lookup_name_info lookup_name
-					     symbol_name_match_type::SEARCH_NAME,
+		    (psym->ginfo.search_name (), symbol_name_match_type::SEARCH_NAME);
+		  sym = block_lookup_symbol (b, lookup_name,
 					     to_search_flags (psym->domain));
 		  if (!sym)
 		    {

gdb/symfile-debug.c

@@ -240,7 +240,7 @@ objfile::map_symtabs_matching_filename
 }
 
 struct compunit_symtab *
-objfile::lookup_symbol (block_enum kind, const char *name,
+objfile::lookup_symbol (block_enum kind, const lookup_name_info &name,
 			domain_search_flags domain)
 {
   struct compunit_symtab *retval = nullptr;
@@ -248,18 +248,16 @@ objfile::lookup_symbol (block_enum kind, const char *name,
   if (debug_symfile)
     gdb_printf (gdb_stdlog,
 		"qf->lookup_symbol (%s, %d, \"%s\", %s)\n",
-		objfile_debug_name (this), kind, name,
+		objfile_debug_name (this), kind, name.c_str (),
 		domain_name (domain).c_str ());
 
-  lookup_name_info lookup_name (name, symbol_name_match_type::FULL);
-
   auto search_one_symtab = [&] (compunit_symtab *stab)
   {
     struct symbol *sym, *with_opaque = NULL;
     const struct blockvector *bv = stab->blockvector ();
     const struct block *block = bv->block (kind);
 
-    sym = block_find_symbol (block, lookup_name, domain, &with_opaque);
+    sym = block_find_symbol (block, name, domain, &with_opaque);
 
     /* Some caution must be observed with overloaded functions
        and methods, since the index will not contain any overload
@@ -282,7 +280,7 @@ objfile::lookup_symbol (block_enum kind, const char *name,
     {
       if (!iter->expand_symtabs_matching (this,
 					  nullptr,
-					  &lookup_name,
+					  &name,
 					  nullptr,
 					  search_one_symtab,
 					  kind == GLOBAL_BLOCK

gdb/symtab.c

@@ -2023,13 +2023,14 @@ lookup_language_this (const struct language_defn *lang,
 				lang->name (), host_address_to_string (block),
 				objfile_debug_name (block->objfile ()));
 
+  lookup_name_info this_name (lang->name_of_this (),
+			      symbol_name_match_type::SEARCH_NAME);
+
   while (block)
     {
       struct symbol *sym;
 
-      sym = block_lookup_symbol (block, lang->name_of_this (),
+      sym = block_lookup_symbol (block, this_name, SEARCH_VFT);
-				 symbol_name_match_type::SEARCH_NAME,
-				 SEARCH_VFT);
       if (sym != NULL)
 	{
 	  symbol_lookup_debug_printf_v
@@ -2264,7 +2265,8 @@ lookup_symbol_in_block (const char *name, symbol_name_match_type match_type,
 	 domain_name (domain).c_str ());
     }
 
-  sym = block_lookup_symbol (block, name, match_type, domain);
+  lookup_name_info lookup_name (name, match_type);
+  sym = block_lookup_symbol (block, lookup_name, domain);
   if (sym)
     {
       symbol_lookup_debug_printf_v ("lookup_symbol_in_block (...) = %s",
@@ -2438,7 +2440,8 @@ lookup_symbol_via_quick_fns (struct objfile *objfile,
      block_index == GLOBAL_BLOCK ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
      name, domain_name (domain).c_str ());
 
-  cust = objfile->lookup_symbol (block_index, name, domain);
+  lookup_name_info lookup_name (name, symbol_name_match_type::FULL);
+  cust = objfile->lookup_symbol (block_index, lookup_name, domain);
   if (cust == NULL)
     {
       symbol_lookup_debug_printf_v
@@ -2448,8 +2451,7 @@ lookup_symbol_via_quick_fns (struct objfile *objfile,
 
   bv = cust->blockvector ();
   block = bv->block (block_index);
-  result.symbol = block_lookup_symbol (block, name,
+  result.symbol = block_lookup_symbol (block, lookup_name, domain);
-				       symbol_name_match_type::FULL, domain);
   if (result.symbol == NULL)
     error_in_psymtab_expansion (block_index, name, cust);
 
@@ -2703,7 +2705,7 @@ lookup_transparent_type (const char *name)
 static struct type *
 basic_lookup_transparent_type_quick (struct objfile *objfile,
 				     enum block_enum block_index,
-				     const char *name)
+				     const lookup_name_info &name)
 {
   struct compunit_symtab *cust;
   const struct blockvector *bv;
@@ -2717,10 +2719,9 @@ basic_lookup_transparent_type_quick (struct objfile *objfile,
   bv = cust->blockvector ();
   block = bv->block (block_index);
 
-  lookup_name_info lookup_name (name, symbol_name_match_type::FULL);
+  sym = block_find_symbol (block, name, SEARCH_STRUCT_DOMAIN, nullptr);
-  sym = block_find_symbol (block, lookup_name, SEARCH_STRUCT_DOMAIN, nullptr);
   if (sym == nullptr)
-    error_in_psymtab_expansion (block_index, name, cust);
+    error_in_psymtab_expansion (block_index, name.c_str (), cust);
   gdb_assert (!TYPE_IS_OPAQUE (sym->type ()));
   return sym->type ();
 }
@@ -2732,19 +2733,17 @@ basic_lookup_transparent_type_quick (struct objfile *objfile,
 static struct type *
 basic_lookup_transparent_type_1 (struct objfile *objfile,
 				 enum block_enum block_index,
-				 const char *name)
+				 const lookup_name_info &name)
 {
   const struct blockvector *bv;
   const struct block *block;
   const struct symbol *sym;
 
-  lookup_name_info lookup_name (name, symbol_name_match_type::FULL);
   for (compunit_symtab *cust : objfile->compunits ())
     {
       bv = cust->blockvector ();
       block = bv->block (block_index);
-      sym = block_find_symbol (block, lookup_name, SEARCH_STRUCT_DOMAIN,
+      sym = block_find_symbol (block, name, SEARCH_STRUCT_DOMAIN, nullptr);
-			       nullptr);
       if (sym != nullptr)
 	{
 	  gdb_assert (!TYPE_IS_OPAQUE (sym->type ()));
@@ -2766,6 +2765,8 @@ basic_lookup_transparent_type (const char *name)
 {
   struct type *t;
 
+  lookup_name_info lookup_name (name, symbol_name_match_type::FULL);
+
   /* Now search all the global symbols.  Do the symtab's first, then
      check the psymtab's.  If a psymtab indicates the existence
      of the desired name as a global, then do psymtab-to-symtab
@@ -2773,14 +2774,16 @@ basic_lookup_transparent_type (const char *name)
 
   for (objfile *objfile : current_program_space->objfiles ())
     {
-      t = basic_lookup_transparent_type_1 (objfile, GLOBAL_BLOCK, name);
+      t = basic_lookup_transparent_type_1 (objfile, GLOBAL_BLOCK,
+					   lookup_name);
       if (t)
 	return t;
     }
 
   for (objfile *objfile : current_program_space->objfiles ())
     {
-      t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
+      t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK,
+					       lookup_name);
       if (t)
 	return t;
     }
@@ -2794,14 +2797,16 @@ basic_lookup_transparent_type (const char *name)
 
   for (objfile *objfile : current_program_space->objfiles ())
     {
-      t = basic_lookup_transparent_type_1 (objfile, STATIC_BLOCK, name);
+      t = basic_lookup_transparent_type_1 (objfile, STATIC_BLOCK,
+					   lookup_name);
       if (t)
 	return t;
     }
 
   for (objfile *objfile : current_program_space->objfiles ())
     {
-      t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
+      t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK,
+					       lookup_name);
       if (t)
 	return t;
     }