diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 649f45eebb9..4eca5bf49e3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-10-06  Dehao Chen  <dehao@google.com>
+
+	PR debug/54826
+	* gimple-low.c (lower_stmt): Set the block for call args.
+
 2012-10-06  Jan Hubicka  <jh@suse.cz>
 
 	* doc/invoke.texi (-fprofile-report): Document.
diff --git a/gcc/gimple-low.c b/gcc/gimple-low.c
index 424ad550d78..677e41f2673 100644
--- a/gcc/gimple-low.c
+++ b/gcc/gimple-low.c
@@ -425,6 +425,14 @@ lower_stmt (gimple_stmt_iterator *gsi, struct lower_data *data)
     case GIMPLE_CALL:
       {
 	tree decl = gimple_call_fndecl (stmt);
+	unsigned i;
+
+	for (i = 0; i < gimple_call_num_args (stmt); i++)
+	  {
+	    tree arg = gimple_call_arg (stmt, i);
+	    if (EXPR_P (arg))
+	      TREE_SET_BLOCK (arg, data->block);
+	  }
 
 	if (decl
 	    && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL