Optimize _bfd_elf_allocate_ifunc_dyn_relocs.

2011-01-06  H.J. Lu  <hongjiu.lu@intel.com>

	* elf-ifunc.c (_bfd_elf_allocate_ifunc_dyn_relocs): Optimized.

1 files changed, 24 insertions, 18 deletions

diff --git a/bfd/elf-ifunc.c b/bfd/elf-ifunc.c
index 17b23c2ffc..81429b8433 100644
--- a/bfd/elf-ifunc.c
+++ b/bfd/elf-ifunc.c
@@ -194,25 +194,20 @@ _bfd_elf_allocate_ifunc_dyn_relocs (struct bfd_link_info *info,
          where it is marked with regular reference, but not non-GOT
 	 reference.  It may happen if we didn't see STT_GNU_IFUNC
 	 symbol at the time when checking relocations.  */
-      bfd_size_type count = 0;
-
       if (info->shared
 	  && !h->non_got_ref
 	  && h->ref_regular)
-	{
-	  for (p = *head; p != NULL; p = p->next)
-	    count += p->count;
-	  if (count != 0)
-	    h->non_got_ref = 1;
-	}
+	for (p = *head; p != NULL; p = p->next)
+	  if (p->count)
+	    {
+	      h->non_got_ref = 1;
+	      goto keep;
+	    }
 
-      if (count == 0)
-	{
-	  h->got = htab->init_got_offset;
-	  h->plt = htab->init_plt_offset;
-	  *head = NULL;
-	  return TRUE;
-	}
+      h->got = htab->init_got_offset;
+      h->plt = htab->init_plt_offset;
+      *head = NULL;
+      return TRUE;
     }
 
   /* Return and discard space for dynamic relocations against it if
@@ -228,6 +223,7 @@ _bfd_elf_allocate_ifunc_dyn_relocs (struct bfd_link_info *info,
       return TRUE;
     }
 
+keep:
   bed = get_elf_backend_data (info->output_bfd);
   if (bed->rela_plts_and_copies_p)
     sizeof_reloc = bed->s->sizeof_rela;
@@ -277,10 +273,20 @@ _bfd_elf_allocate_ifunc_dyn_relocs (struct bfd_link_info *info,
     *head = NULL;
 
   /* Finally, allocate space.  */
-  for (p = *head; p != NULL; p = p->next)
-    htab->irelifunc->size += p->count * sizeof_reloc;
+  p = *head;
+  if (p != NULL)
+    {
+      bfd_size_type count = 0;
+      do
+	{
+	  count += p->count;
+	  p = p->next;
+	}
+      while (p != NULL);
+      htab->irelifunc->size += count * sizeof_reloc;
+    }
 
-  /* For STT_GNU_IFUNC symbol, .got.plt has the real function addres
+  /* For STT_GNU_IFUNC symbol, .got.plt has the real function address
      and .got has the PLT entry adddress.  We will load the GOT entry
      with the PLT entry in finish_dynamic_symbol if it is used.  For
      branch, it uses .got.plt.  For symbol value,