rs6000.c (compute_save_world_info): Set lr_save_p if we are going to "save the world".

2008-04-12  Andrew Pinski  <pinskia@gmail.com>

        * config/rs6000/rs6000.c (compute_save_world_info): Set lr_save_p if
        we are going to "save the world".


2008-04-12  Andrew Pinski  <pinskia@gmail.com>

        * gcc.target/powerpc/darwin-save-world-1.c: New test.

From-SVN: r134237

gcc/ChangeLog

+2008-04-12  Andrew Pinski  <pinskia@gmail.com>
+
+	* config/rs6000/rs6000.c (compute_save_world_info): Set lr_save_p if
+	we are going to "save the world".
+
 2008-04-13  Hans-Peter Nilsson  <hp@axis.com>
 
 	* config/cris/cris.md ("*andhi_lowpart_non_v32", "*andhi_lowpart_v32")

gcc/config/rs6000/rs6000.c

@@ -14258,6 +14258,9 @@ compute_save_world_info (rs6000_stack_t *info_ptr)
 	 will attempt to save it. */
       info_ptr->vrsave_size  = 4;
 
+      /* If we are going to save the world, we need to save the link register too.  */
+      info_ptr->lr_save_p = 1;
+
       /* "Save" the VRsave register too if we're saving the world.  */
       if (info_ptr->vrsave_mask == 0)
 	info_ptr->vrsave_mask = compute_vrsave_mask ();

gcc/testsuite/ChangeLog

+2008-04-12  Andrew Pinski  <pinskia@gmail.com>
+
+	* gcc.target/powerpc/darwin-save-world-1.c: New test.
+
 2008-04-11  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/35869

gcc/testsuite/gcc.target/powerpc/darwin-save-world-1.c

+/* { dg-do run { target powerpc*-*-* } } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
+/* { dg-options "-maltivec" } */
+
+/* With altivec turned on, Darwin wants to save the world but we did not mark lr as being saved any more
+   as saving the lr is not needed for saving altivec registers.  */
+
+int main (void)
+{
+  __label__ l1;
+  void __attribute__((used)) q(void)
+  {
+    goto l1;
+  }
+
+  l1:;
+  return 0;
+}