re PR debug/54826 (gdb test case failure (bs15503) due to gaps in lexical block)

2012-10-05  Dehao Chen  <dehao@google.com>

	PR debug/54826
	* gimple-low.c (lower_stmt): Set the block for call args.

From-SVN: r192165

gcc/ChangeLog

+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.

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