[PATCH, Google] Notify df framework when removing an insn in simplify-got

[Carrot Wei]

Hi

I forgot to notify df framework when I removed an insn, it caused df
verification failure described in google bug b/16155462.

The following patch passed regression test on arm qemu in both thumb
and arm modes.
OK for google 4.9 branch?


Index: simplify-got.c
===================================================================
--- simplify-got.c (revision 224174)
+++ simplify-got.c (working copy)
@@ -169,7 +169,10 @@

   /* Since there is no usage of pic_reg now, we can remove it.  */
   if (use)
-    remove_insn (use);
+    {
+      df_insn_delete (use);
+      remove_insn (use);
+    }
   targetm.got_access.clear_pic_reg ();
   free (got_accesses);
   htab_delete (var_table);