From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andreas Jaeger <aj@suse.de>
To: "Joseph S. Myers" <jsm28@cam.ac.uk>
Cc: Jan Hubicka <jh@suse.cz>, <gcc-patches@gcc.gnu.org>
Subject: Re: spec2000 regression
Date: Wed, 15 Aug 2001 11:04:00 -0000
Message-id: <u8d75x439q.fsf@gromit.moeb>
References: <Pine.LNX.4.33.0108151543040.9965-100000@kern.srcf.societies.cam.ac.uk>
X-SW-Source: 2001-08/msg00936.html

"Joseph S. Myers" <jsm28@cam.ac.uk> writes:

> On Wed, 15 Aug 2001, Jan Hubicka wrote:
>
>> Would be following testsuite OK?
>> 
>> long long a1, *a=&a1;
>> short b1, *b=&b1;
>> main()
>> {
>> #ifdef __OPTIMIZE__
>>   *a = 1;
>>   *b = 2;
>>   if (*a != 1)
>> 	  undefined ();
>> #endif
>>   return 0;
>> }
>
> Assuming that it does indeed pass with working compilers but fails with
> mainline before the problem is fixed, that testcase should be OK.

It works with 3.0 and fails with 3.1 CVS from yesterday:

gromit:/tmp:[127]$ /opt/gcc-3.1-devel/bin/gcc -Wall t.c -O2
t.c:4: warning: return type defaults to `int'
t.c: In function `main':
t.c:9: warning: implicit declaration of function `undefined'
/tmp/cc9lSIBE.o: In function `main':
/tmp/cc9lSIBE.o(.text+0x41): undefined reference to `undefined'
collect2: ld returned 1 exit status

gromit:/tmp:[1]$ /opt/gcc-3.0/bin/gcc -Wall t.c -O2
t.c:4: warning: return type defaults to `int'
t.c: In function `main':
t.c:9: warning: implicit declaration of function `undefined'

I didn't check any of the patches floating around.

But shouldn't the testcase get fixed so that it issues no warnings?

Andreas
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj