[binutils-gdb] Micro-optimize cooked_index_entry::full_name

[Tom Tromey <tromey@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=72b580b8f48927cf7bc4cf8bb951aaeff637d0ee

commit 72b580b8f48927cf7bc4cf8bb951aaeff637d0ee
Author: Tom Tromey <tom@tromey.com>
Date:   Tue Apr 19 23:44:50 2022 -0600

    Micro-optimize cooked_index_entry::full_name
    
    I noticed that cooked_index_entry::full_name can return the canonical
    string when there is no parent entry.
    
    Regression tested on x86-64 Fedora 34.

Diff:
---
 gdb/dwarf2/cooked-index.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/gdb/dwarf2/cooked-index.c b/gdb/dwarf2/cooked-index.c
index b66ef5a1c64..d8a1ab8d30e 100644
--- a/gdb/dwarf2/cooked-index.c
+++ b/gdb/dwarf2/cooked-index.c
@@ -50,7 +50,7 @@ eq_entry (const void *a, const void *b)
 const char *
 cooked_index_entry::full_name (struct obstack *storage) const
 {
-  if ((flags & IS_LINKAGE) != 0)
+  if ((flags & IS_LINKAGE) != 0 || parent_entry == nullptr)
     return canonical;
 
   const char *sep = nullptr;
@@ -66,13 +66,12 @@ cooked_index_entry::full_name (struct obstack *storage) const
     case language_ada:
       sep = ".";
       break;
-    }
 
-  if (sep == nullptr)
-    return canonical;
+    default:
+      return canonical;
+    }
 
-  if (parent_entry != nullptr)
-    parent_entry->write_scope (storage, sep);
+  parent_entry->write_scope (storage, sep);
   obstack_grow0 (storage, canonical, strlen (canonical));
   return (const char *) obstack_finish (storage);
 }