for  gcc/ChangeLog
from  Alexandre Oliva  <aoliva@redhat.com>

	PR debug/53671
	PR debug/49888
	* var-tracking.c (vt_init_cfa_base): Drop redundant recording of
	CFA base.

Index: gcc/var-tracking.c
===================================================================
--- gcc/var-tracking.c.orig	2012-06-18 08:44:13.459569497 -0300
+++ gcc/var-tracking.c	2012-06-18 08:55:31.023984364 -0300
@@ -9582,9 +9582,6 @@ vt_init_cfa_base (void)
 				 VOIDmode, get_insns ());
   preserve_value (val);
   cselib_preserve_cfa_base_value (val, REGNO (cfa_base_rtx));
-  var_reg_decl_set (&VTI (ENTRY_BLOCK_PTR)->out, cfa_base_rtx,
-		    VAR_INIT_STATUS_INITIALIZED, dv_from_value (val->val_rtx),
-		    0, NULL_RTX, INSERT);
 }
 
 /* Allocate and initialize the data structures for variable tracking