Re: optimization/1762, please reopen

Re: optimization/1762, please reopen

[Reichelt]

The following reply was made to PR optimization/1762; it has been noted by GNATS.

From: Reichelt <reichelt@igpm.rwth-aachen.de>
To: rth@gcc.gnu.org, gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org,
        gcc-bugs@gcc.gnu.org
Cc:  
Subject: Re: optimization/1762, please reopen
Date: Mon, 25 Jun 2001 18:57:58 +0200

 Hello,
 
 I'm afraid the bug reappeared with the 3.0 release.
 So, please reopen the PR.
 
 Greetings,
 Volker Reichelt
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=1762&database=gcc
 
 

Re: optimization/1762, please reopen

[Reichelt]

The following reply was made to PR optimization/1762; it has been noted by GNATS.

From: Reichelt <reichelt@igpm.rwth-aachen.de>
To: rth@redhat.com
Cc: rth@gcc.gnu.org, gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org
Subject: Re: optimization/1762, please reopen
Date: Tue, 26 Jun 2001 13:43:18 +0200

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 Content-Type: TEXT/plain; charset=us-ascii
 
 Hello again.
 
 On 25 Jun, Richard Henderson wrote:
 > On Mon, Jun 25, 2001 at 08:39:11PM +0200, Reichelt wrote:
 >> I still get the wrong results with the code snippet from the PR.
 >> But it's target specific (maybe I should have mentioned that more
 >> explicitly): On an x86-linux machine everything works fine
 >> (return value "0"), but on the SGI I get "1" instead.
 >> 
 >> Did you check it on an SGI?
 > 
 > Yes.
 > 
 > $ ./cc1 -quiet -v -O z.c
 > GNU CPP version 3.0.1 20010622 (prerelease) (cpplib) [AL 1.1, MM 40] SGI running IRIX 6.x
 > ignoring nonexistent directory "/usr/local/include"
 > ignoring nonexistent directory "..."
 > ignoring nonexistent directory "..."
 > #include "..." search starts here:
 > #include <...> search starts here:
 >  /usr/include
 > End of search list.
 > $ gcc z.s
 > $ ./a.out
 > $ echo $?
 > 0
 > $ uname -a
 > IRIX ada 6.3 12161207 IP32
 > 
 > So.  What are you doing differently?
 
 I took me a while to find out, but apparently it's a matter of mips3
 or mips4 (with mips4 generating the wrong code):
 
 $ gcc -mips4 -mabi=n32 -O NaNBug1762.c; ./a.out; echo $?
 1
 $ gcc -mips3 -mabi=n32 -O NaNBug1762.c; ./a.out; echo $?
 ld32: WARNING 158: Expecting MIPS3 objects: /usr/LOCAL/lib/gcc-lib/mips-sgi-irix6.5/3.0/crtbegin.o is MIPS4.
 0
 
 I'm using IRIX 6.5 and the default configuration is mips4.
 You seem to be using IRIX 6.3. Maybe your default configuration is
 mips3? The assembler files show the following differences:
 
 $ diff -c MIPS3.s MIPS4.s
 *** MIPS3.s     Tue Jun 26 13:31:38 2001
 --- MIPS4.s     Tue Jun 26 13:31:56 2001
 ***************
 *** 26,36 ****
         daddu   $gp,$1,$25
         .set    at
         dmtc1   $0,$f0
 !       c.lt.d  $f12,$f13
         #nop
 !       bc1f    .L3
 !       l.d     $f0,.LC0
 ! .L3:
         ld      $28,16($sp)
         #nop
         .set    noreorder
 --- 26,35 ----
         daddu   $gp,$1,$25
         .set    at
         dmtc1   $0,$f0
 !       c.le.d  $f13,$f12
 !       l.d     $f1,.LC0
         #nop
 !       movf.d  $f0,$f1,$fcc0
         ld      $28,16($sp)
         #nop
         .set    noreorder
 
 Greetings,
 Volker
 
 
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 ---2038259397-2078917053-993555807=:708930--

Re: optimization/1762, please reopen

[Richard Henderson]

The following reply was made to PR optimization/1762; it has been noted by GNATS.

From: Richard Henderson <rth@redhat.com>
To: Reichelt <reichelt@igpm.rwth-aachen.de>
Cc: rth@gcc.gnu.org, gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org,
        gcc-bugs@gcc.gnu.org
Subject: Re: optimization/1762, please reopen
Date: Mon, 25 Jun 2001 11:08:34 -0700

 On Mon, Jun 25, 2001 at 06:57:58PM +0200, Reichelt wrote:
 > I'm afraid the bug reappeared with the 3.0 release.
 > So, please reopen the PR.
 
 The test case still passes for me.  Is the test not in fact
 representative of your code?
 
 
 r~