[Bug tree-optimization/21732] New: -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[Bug tree-optimization/21732] New: -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[Ralf_Recker at gmx dot de]

When dumping the trees during compilation GCC-4.1-2005010[1,8] went into
an endless loop during the *.c.t22.copyprop or the *.c.t37.copyprop2 dump, thus
generating larger and larger files. After the file reaches 2GB in size gcc stops.

The same happens with gcc-4.1-20050515 in the steps *.c.t24.copyprop or
*.c.t38.copyprop2.

The dumper seems to follow and print a copy propagation chain like this in all
the cases: A->B->A->B->A->B->...

I've observed this behaviour with many source files.

-- 
           Summary: -ftree-dump-all-details hangs during *.c.t24.copyprop or
                    *.c.t38.copyprop2
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: Ralf_Recker at gmx dot de
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732

[Bug tree-optimization/21732] -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[giovannibajo at libero dot it]

------- Additional Comments From giovannibajo at libero dot it  2005-05-24 09:27 -------
Can you provide one preprocessed source of those many?

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732

[Bug tree-optimization/21732] -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-27 20:07 -------
Hmm, it might not be a hang but just outputting too much.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732

[Bug tree-optimization/21732] -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-27 20:26 -------
tree-ssa-operands.c have this problem:
..
iter_6 -> iter_100 -> iter_6 -> iter_100 -> iter_6 -> iter_100 -> iter_6 -> iter_100 ...

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732

[Bug tree-optimization/21732] -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-27 21:10 -------
Mine, I figured out a way to fix this without any troubles:
http://gcc.gnu.org/ml/gcc-patches/2005-05/msg02652.html

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |pinskia at gcc dot gnu dot
                   |dot org                     |org
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2005-
                   |                            |05/msg02652.html
             Status|WAITING                     |ASSIGNED
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732

[Bug tree-optimization/21732] -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[Ralf_Recker at gmx dot de]

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------- Additional Comments From Ralf_Recker at gmx dot de  2005-05-31 07:50 -------
Subject: Re:  -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

> --- Ursprüngliche Nachricht ---
> Von: "giovannibajo at libero dot it" <gcc-bugzilla@gcc.gnu.org>
> An: Ralf_Recker@gmx.de
> Betreff: [Bug tree-optimization/21732] -ftree-dump-all-details hangs
> during *.c.t24.copyprop or *.c.t38.copyprop2
> Datum: 24 May 2005 09:27:06 -0000
> 
> 
> ------- Additional Comments From giovannibajo at libero dot it  2005-05-24
> 09:27 -------
> Can you provide one preprocessed source of those many?
> 
> -- 
>            What    |Removed                     |Added
>
----------------------------------------------------------------------------
>              Status|UNCONFIRMED                 |WAITING
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732
> 
> ------- You are receiving this mail because: -------
> You reported the bug, or are watching the reporter.

Sorry, I was absent a few days and forgot to tell it. I see that the
problem is already solved! Thank you very much for your help. I'm am
still in the phase of diving deep in this huge mountain (Everest?) of
source code and on my old PC it takes a long time to recompile the C/C++
compiler to check, if a code change by myself works or breaks another
thing.

    Ralf Recker <Ralf_Recker@gmx.de>



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732

[Bug tree-optimization/21732] -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-05-31 16:29 -------
Subject: Bug 21732

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	pinskia@gcc.gnu.org	2005-05-31 16:29:17

Modified files:
	gcc            : ChangeLog tree-ssa-copy.c 

Log message:
	2005-05-31  Andrew Pinski  <pinskia@physics.uc.edu>
	
	PR tree-opt/21732
	* tree-ssa-copy.c (dump_copy_of): Create a bitmap and don't visit a
	SSA_NAME twice and cause the loop to become finite.  Remove the test
	for val.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.8955&r2=2.8956
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-copy.c.diff?cvsroot=gcc&r1=2.30&r2=2.31



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732

[Bug tree-optimization/21732] -ftree-dump-all-details hangs during *.c.t24.copyprop or *.c.t38.copyprop2

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-31 16:29 -------
Fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21732