re PR target/66541 (r224314 causes ICE in gcc.dg/torture/pr52429.c)

PR target/66541
PR target/52144
* config/arm/arm.c (arm_set_current_function): Handle
explicit default options.

From-SVN: r224638

gcc/ChangeLog

+2015-06-19  Christian Bruel  <christian.bruel@st.com>
+
+	PR target/66541
+	PR target/52144
+	* config/arm/arm.c (arm_set_current_function): Handle
+	explicit default options.
+
 2015-06-18  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (*movsicc_noc_zext): New insn.

gcc/config/arm/arm.c

@@ -29351,9 +29351,9 @@ arm_set_current_function (tree fndecl)
 
   arm_previous_fndecl = fndecl;
   if (old_tree == new_tree)
-    ;
+    return;
 
-  else if (new_tree)
+  if (new_tree && new_tree != target_option_default_node)
     {
       cl_target_option_restore (&global_options,
 				TREE_TARGET_OPTION (new_tree));
@@ -29365,7 +29365,7 @@ arm_set_current_function (tree fndecl)
 	  = save_target_globals_default_opts ();
     }
 
-  else if (old_tree)
+  else if (old_tree && old_tree != target_option_default_node)
     {
       new_tree = target_option_current_node;