Unify lookup_symbol_in_objfile_symtabs

That's right, block_lookup_symbol_primary()'s additional requirement over
block_lookup_symbol() is:
	Function is useful if one iterates all global/static blocks of an
	objfile.

Which is satisfied both in lookup_symbol_in_objfile_symtabs() and in
lookup_global_symbol_from_objfile() thanks to their's ALL_OBJFILE_COMPUNITS.

In fact after reverting that ba715d7fe49c8a59660fbd571b935b29eb7cfbdb above
the lines of code were exactly the same.

So instead of accelerating both lookup_symbol_in_objfile_symtabs() and
lookup_global_symbol_from_objfile() I just accelerated
lookup_symbol_in_objfile_symtabs() and I am proposing to reuse
lookup_symbol_in_objfile_symtabs() in lookup_global_symbol_from_objfile()
instead.  In fact such unification would already save some lines of code even
before the checked-in acceleration patch above.

gdb/ChangeLog
2014-12-05  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* symtab.c (lookup_symbol_in_objfile_symtabs): New declaration.
	(lookup_global_symbol_from_objfile): Call it.

1 files changed, 10 insertions, 17 deletions

diff --git a/gdb/symtab.c b/gdb/symtab.c
index c697b1b..c07b902 100644
--- a/gdb/symtab.c
+++ b/gdb/symtab.c
@@ -79,6 +79,11 @@ struct symbol *lookup_local_symbol (const char *name,
 				    const domain_enum domain,
 				    enum language language);
 
+static struct symbol *
+  lookup_symbol_in_objfile_symtabs (struct objfile *objfile,
+				    int block_index, const char *name,
+				    const domain_enum domain);
+
 static
 struct symbol *lookup_symbol_via_quick_fns (struct objfile *objfile,
 					    int block_index,
@@ -1546,24 +1551,12 @@ lookup_global_symbol_from_objfile (struct objfile *main_objfile,
        objfile;
        objfile = objfile_separate_debug_iterate (main_objfile, objfile))
     {
-      struct compunit_symtab *cust;
       struct symbol *sym;
-
-      /* Go through symtabs.  */
-      ALL_OBJFILE_COMPUNITS (objfile, cust)
-	{
-	  const struct blockvector *bv;
-	  const struct block *block;
-
-	  bv = COMPUNIT_BLOCKVECTOR (cust);
-	  block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
-	  sym = block_lookup_symbol (block, name, domain);
-	  if (sym)
-	    {
-	      block_found = block;
-	      return fixup_symbol_section (sym, objfile);
-	    }
-	}
+      
+      sym = lookup_symbol_in_objfile_symtabs (objfile, GLOBAL_BLOCK, name,
+					      domain);
+      if (sym != NULL)
+	return sym;
 
       sym = lookup_symbol_via_quick_fns (objfile, GLOBAL_BLOCK, name, domain);
       if (sym)