Re: optimization/8697: [IA-64] combine bug

Re: optimization/8697: [IA-64] combine bug

[ebotcazou]

Synopsis: [IA-64] combine bug

Responsible-Changed-From-To: unassigned->ebotcazou
Responsible-Changed-By: ebotcazou
Responsible-Changed-When: Tue Feb 18 16:00:53 2003
Responsible-Changed-Why:
    Investigating.
State-Changed-From-To: feedback->analyzed
State-Changed-By: ebotcazou
State-Changed-When: Tue Feb 18 16:00:53 2003
State-Changed-Why:
    Still present as of today.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8697

Re: optimization/8697: [IA-64] combine bug

[schwab]

Synopsis: [IA-64] combine bug

State-Changed-From-To: analyzed->closed
State-Changed-By: schwab
State-Changed-When: Tue Feb 18 20:24:53 2003
State-Changed-Why:
    Fixed in 3.3.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8697

Re: optimization/8697: [IA-64] combine bug

[Andreas Schwab]

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The following reply was made to PR optimization/8697; it has been noted by GNATS.

From: Andreas Schwab <schwab@suse.de>
To: Eric Botcazou <ebotcazou@libertysurf.fr>
Cc: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org
Subject: Re: optimization/8697: [IA-64] combine bug
Date: Tue, 18 Feb 2003 21:00:37 +0100

 Eric Botcazou <ebotcazou@libertysurf.fr> writes:
 
 |> > Still reproducable with both 3.3 and 3.4 as of today.
 |> 
 |> Are you sure?
 
 The test case is buggy. :-(  The first line of main should actually read
 
   operands[1] = gen_rtx_CONST_INT (0, 0x400000);
 
 With this correction it works now.
 
 Andreas.
 
 -- 
 Andreas Schwab, SuSE Labs, schwab@suse.de
 SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
 Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
 "And now for something completely different."

Re: optimization/8697: [IA-64] combine bug

[Eric Botcazou]

The following reply was made to PR optimization/8697; it has been noted by GNATS.

From: Eric Botcazou <ebotcazou@libertysurf.fr>
To: Andreas Schwab <schwab@suse.de>
Cc: gcc-gnats@gcc.gnu.org,
 gcc-bugs@gcc.gnu.org,
 nobody@gcc.gnu.org
Subject: Re: optimization/8697: [IA-64] combine bug
Date: Tue, 18 Feb 2003 18:33:26 +0100

 > Still reproducable with both 3.3 and 3.4 as of today.
 
 Are you sure?
 
 rotate.c.18.life:
 
 (insn 26 75 27 1 0x40188780 (set (reg:SI 349)
         (rotate:SI (reg/v:SI 342)
             (const_int 16 [0x10]))) 190 {*rotlsi3_internal} (nil)
     (expr_list:REG_DEAD (reg/v:SI 342)
         (nil)))
 
 (insn 27 26 28 1 0x40188780 (set (reg:DI 350)
         (zero_extend:DI (reg:SI 349))) 33 {zero_extendsidi2} (insn_list 26 
 (nil))
     (expr_list:REG_DEAD (reg:SI 349)
         (nil)))
 
 
 rotate.c.19.combine:
 
 (insn 26 75 27 1 0x40188780 (set (reg:SI 349)
         (rotate:SI (reg/v:SI 342)
             (const_int 16 [0x10]))) 190 {*rotlsi3_internal} (nil)
     (expr_list:REG_DEAD (reg/v:SI 342)
         (nil)))
 
 (insn 27 26 28 1 0x40188780 (set (reg:DI 350)
         (zero_extend:DI (reg:SI 349))) 33 {zero_extendsidi2} (insn_list 26 
 (nil))
     (expr_list:REG_DEAD (reg:SI 349)
         (nil)))
 
 
 rotate.c.33.mach:
 
 (insn 27 96 28 1 0x40188780 (set (reg:DI 121 r38 [350])
         (zero_extend:DI (reg:SI 121 r38 [349]))) 33 {zero_extendsidi2} 
 (insn_list 81 (nil))
     (nil))
 
 
 Using built-in specs.
 Configured with: ../configure --target=ia64-linux-gnu --prefix=/usr/local 
 --enable-languages=c --enable-checking=misc,tree --disable-nls
 Thread model: posix
 gcc version 3.3 20030214 (prerelease)
 
 -- 
 Eric Botcazou

Re: optimization/8697: [IA-64] combine bug

[Eric Botcazou]

The following reply was made to PR optimization/8697; it has been noted by GNATS.

From: Eric Botcazou <ebotcazou@libertysurf.fr>
To: Andreas Schwab <schwab@suse.de>
Cc: gcc-gnats@gcc.gnu.org,
 gcc-bugs@gcc.gnu.org,
 nobody@gcc.gnu.org
Subject: Re: optimization/8697: [IA-64] combine bug
Date: Tue, 18 Feb 2003 16:57:07 +0100

 > Still reproducable with both 3.3 and 3.4 as of today.
 
 Amazing, the symptoms are strictly identical to that of PR opt/9279. Since I 
 happen to know well the latter, I'll try to investigate this one.
 
 -- 
 Eric Botcazou

Re: optimization/8697: [IA-64] combine bug

[Andreas Schwab]

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The following reply was made to PR optimization/8697; it has been noted by GNATS.

From: Andreas Schwab <schwab@suse.de>
To: gcc-gnats@gcc.gnu.org, schwab@suse.de, gcc-bugs@gcc.gnu.org,
	nobody@gcc.gnu.org, gcc-prs@gcc.gnu.org, ebotcazou@gcc.gnu.org
Cc:  
Subject: Re: optimization/8697: [IA-64] combine bug
Date: Tue, 18 Feb 2003 16:46:35 +0100

 Still reproducable with both 3.3 and 3.4 as of today.
 
 Andreas.
 
 -- 
 Andreas Schwab, SuSE Labs, schwab@suse.de
 SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
 Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
 "And now for something completely different."
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8697

Re: optimization/8697: [IA-64] combine bug

[ebotcazou]

Old Synopsis: [IA64] Lost zero-extension
New Synopsis: [IA-64] combine bug

State-Changed-From-To: open->feedback
State-Changed-By: ebotcazou
State-Changed-When: Tue Feb 18 13:59:24 2003
State-Changed-Why:
    Very likely a duplicate of PR opt/9279, which is fixed on 3.3
    branch and mainline but is in "won't fix" state on the 3.2 branch.
    Could you verify that the problem is gone on one of the two
    aforementioned codebases?

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8697