[Bug optimization/11980] New: [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[Bug optimization/11980] New: [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[dhazeghi at yahoo dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980

           Summary: [3.4 regression] ICE building cplus-dem.c for x86_64-
                    freebsd5.1: in emit_move_insn, at expr.c:3206
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dhazeghi at yahoo dot com
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: x86_64-freebsd5.1

Building a cross compiler to freebsd 5.1/x86_64 with mainline (20030819) gives:

/tmp/mainline/objdir/gcc/xgcc -B/tmp/mainline/objdir/gcc/ -B/tmp/dara/x86_64-freebsd5.1//
x86_64-freebsd5.1/bin/ -B/tmp/dara/x86_64-freebsd5.1//x86_64-freebsd5.1/lib/ -isystem /
tmp/dara/x86_64-freebsd5.1//x86_64-freebsd5.1/include -isystem /tmp/dara/x86_64-
freebsd5.1//x86_64-freebsd5.1/sys-include -c -DHAVE_CONFIG_H -O2 -g -O2 -I. -I../../../gcc/
libiberty/../include  -W -Wall -Wtraditional -pedantic ../../../gcc/libiberty/cplus-dem.c -o cplus-
dem.o
../../../gcc/libiberty/cplus-dem.c: In function `cplus_demangle_opname':

../../../gcc/libiberty/cplus-dem.c:710: internal compiler error: in emit_move_insn, at expr.c:3206


Lowering optimization level to -O0, the code does not ICE, but at -O1 or higher it does. Here's a 
reduced snippet:

char *strcat(char * , const char * );


void foo(char *result)
{
    strcat (result, "operator");
}

Note that while the error is the same as in PR11974, the testcase for that bug doesn't ICE on this 
target, nor does the one for this bug ICE on that target.

This is a regression from the 3.3 branch (20030819) where the code compiles fine.

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[pinskia at gcc dot gnu dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980



------- Additional Comments From pinskia at gcc dot gnu dot org  2003-08-20 02:13 -------
Note the small example does not ICE on the mainline (20030819) on a cross to x86_64-
suse-linux, so it must be very target spefic.
Any way I think this is exposed or caused by
2003-08-10  Kaveh R. Ghazi

        * builtins.c (expand_builtin_strcat): Optimize constant strings.
But I do not know for sure as I did not do a regression hunt on it but I just have a hunch.

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[dhazeghi at yahoo dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980


dhazeghi at yahoo dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  GCC build triplet|                            |ghazi@gcc.gnu.org


------- Additional Comments From dhazeghi at yahoo dot com  2003-08-20 04:58 -------
Andrew is right. I reverted the changes to builtins.c at http://gcc.gnu.org/ml/gcc-cvs/2003-08/
msg00370.html and the testcase compiles fine. Kaveh, can you have a look at this? The problem is 
readily reproducible with a cross cc1 to x86_64-freebsd. Thanks.

Dara

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[dhazeghi at yahoo dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980


dhazeghi at yahoo dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ghazi at gcc dot gnu dot org
  GCC build triplet|ghazi@gcc.gnu.org           |


------- Additional Comments From dhazeghi at yahoo dot com  2003-08-20 05:00 -------
Kaveh, it looks like your patch at http://gcc.gnu.org/ml/gcc-cvs/2003-08/msg00370.html is 
behind this. Would you mind taking a look at this? Thanks,

Dara

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[pinskia at gcc dot gnu dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980


pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |critical
           Priority|P2                          |P1

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[ghazi at caip dot rutgers dot edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980


ghazi at caip dot rutgers dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ghazi at caip dot rutgers
                   |                            |dot edu

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[ghazi at caip dot rutgers dot edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980


ghazi at caip dot rutgers dot edu changed:

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

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[ghazi at caip dot rutgers dot edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980



------- Additional Comments From ghazi at caip dot rutgers dot edu  2003-08-26 03:34 -------
Subject: Re:  [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

I've been able to reproduce it, however I haven't been able to come up
with a fix yet, sorry.  I'll have more time in a week or two.  If it's
a real problem for someone, we can disable the troublesome code with
#if 0 as a stopgap.  Otherwise I'll take another look early Sept.

		--Kaveh

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[dhazeghi at yahoo dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980


dhazeghi at yahoo dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-08-26 08:06:35
               date|                            |


------- Additional Comments From dhazeghi at yahoo dot com  2003-08-26 08:06 -------
Since I'm the only one who's seen it, and can work around it, fixing it later is fine by me. So long as 
it isn't broken in 3.4, I'm happy...

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2003-12-16 17:17 -------
Kaveh said he would fix this bug back in August.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2003-12-16 17:16 -------
Kaveh said he would fix this bug back in August.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |ghazi at caip dot rutgers
                   |dot org                     |dot edu
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[ghazi at caip dot rutgers dot edu]

------- Additional Comments From ghazi at caip dot rutgers dot edu  2003-12-18 20:12 -------
Subject: Re:  [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206


 > Kaveh said he would fix this bug back in August.

Wasn't this fixed on Sept 3rd?
http://gcc.gnu.org/ml/gcc-patches/2003-09/msg00185.html




-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980

[Bug optimization/11980] [3.4 regression] ICE building cplus-dem.c for x86_64-freebsd5.1: in emit_move_insn, at expr.c:3206

[dhazeghi at yahoo dot com]

------- Additional Comments From dhazeghi at yahoo dot com  2003-12-18 21:04 -------
Fixed on current mainline, thanks Kaveh!

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11980