coverage.c (coverage_compute_profile_id): Return non-0; also handle symbols with unique name.

	* coverage.c (coverage_compute_profile_id): Return non-0;
	also handle symbols with unique name.
	(coverage_end_function): Do not skip DECL_EXTERNAL functions.

From-SVN: r214232

gcc/ChangeLog

+2014-08-20  Jan Hubicka  <hubicka@ucw.cz>
+
+	* coverage.c (coverage_compute_profile_id): Return non-0;
+	also handle symbols with unique name.
+	(coverage_end_function): Do not skip DECL_EXTERNAL functions.
+
 2014-08-20  Steve Ellcey  <sellcey@mips.com>
 
 	PR middle-end/49191

gcc/coverage.c

@@ -579,7 +579,7 @@ coverage_compute_profile_id (struct cgraph_node *n)
   unsigned chksum;
 
   /* Externally visible symbols have unique name.  */
-  if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl))
+  if (TREE_PUBLIC (n->decl) || DECL_EXTERNAL (n->decl) || n->unique_name)
     {
       chksum = coverage_checksum_string
 	(0, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl)));
@@ -601,8 +601,10 @@ coverage_compute_profile_id (struct cgraph_node *n)
 	(chksum, aux_base_name);
     }
 
-  /* Non-negative integers are hopefully small enough to fit in all targets.  */
-  return chksum & 0x7fffffff;
+  /* Non-negative integers are hopefully small enough to fit in all targets.
+     Gcov file formats wants non-zero function IDs.  */
+  chksum = chksum & 0x7fffffff;
+  return chksum + (!chksum);
 }
 
 /* Compute cfg checksum for the function FN given as argument.
@@ -692,11 +694,6 @@ coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum)
     {
       struct coverage_data *item = 0;
 
-      /* If the function is extern (i.e. extern inline), then we won't
-	 be outputting it, so don't chain it onto the function
-	 list.  */
-      if (!DECL_EXTERNAL (current_function_decl))
-	{
       item = ggc_alloc<coverage_data> ();
 
       if (PARAM_VALUE (PARAM_PROFILE_FUNC_INTERNAL_ID))
@@ -714,7 +711,6 @@ coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum)
       item->next = 0;
       *functions_tail = item;
       functions_tail = &item->next;
-	}
 
       for (i = 0; i != GCOV_COUNTERS; i++)
 	{