From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-254589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 2753 invoked by alias); 18 Jun 2008 22:54:13 -0000
Received: (qmail 2670 invoked by uid 48); 18 Jun 2008 22:53:30 -0000
Date: Wed, 18 Jun 2008 22:54:00 -0000
Subject: [Bug c/36571]  New: Default untyped return for AVR is byte register.
X-Bugzilla-Reason: CC
Message-ID: <bug-36571-16013@http.gcc.gnu.org/bugzilla/>
Reply-To: gcc-bugzilla@gcc.gnu.org
To: gcc-bugs@gcc.gnu.org
From: "hutchinsonandy at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2008-06/txt/msg01115.txt.bz2

Test testsuite/gcc.dg/builtin-return-1.c will fail for avr target.

Default implementation of builtin-return-1 is untyped return of a single
register.
Which is R25 and only 1 byte. This is not int as test expects.
So high byte may and does get overwritten before outer return.

The test may be invalid, but this is also reminder that AVR target does not
have a complete definition for untyped return. The default is pretty useless.

Test with be marked XFAIL.


-- 
           Summary: Default untyped return for AVR is byte register.
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hutchinsonandy at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: avr-unknown-nne


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36571