[Bug ada/49539] New: [4.7 regression] Ada TYPES.UNRECOVERABLE_ERROR in comperr.adb:423 on ARM

[Bug ada/49539] New: [4.7 regression] Ada TYPES.UNRECOVERABLE_ERROR in comperr.adb:423 on ARM

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

           Summary: [4.7 regression] Ada TYPES.UNRECOVERABLE_ERROR in
                    comperr.adb:423 on ARM
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mikpe@it.uu.se


gcc-4.7-20110625 failed to bootstrap on armv5tel-linux-gnueabi due to an
internal error in the Ada frontend:

...
/mnt/scratch/gcc-4.7-20110625/gcc/ada/prj-err.ads
/mnt/scratch/gcc-4.7-20110625/gcc/ada/scng.ads
../rts/a-chahan.ads


raised TYPES.UNRECOVERABLE_ERROR : comperr.adb:423
make[3]: *** [make.o] Error 1
make[3]: Leaving directory `/mnt/scratch/objdir47/gcc/ada/tools'
make[2]: *** [gnattools-native] Error 2
make[2]: Leaving directory `/mnt/scratch/objdir47/gnattools'
make[1]: *** [all-gnattools] Error 2
make[1]: Leaving directory `/mnt/scratch/objdir47'
make: *** [bootstrap] Error 2

4.7-20110611 bootstrapped fine w/ Ada on that machine.

Configured as:
/mnt/scratch/gcc-4.7-20110625/configure --prefix=/mnt/scratch/install47
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-languages=c,c++,fortran,ada
--enable-java-awt=gtk --disable-dssi
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --disable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--disable-sjlj-exceptions --with-arch=armv5te --with-tune=xscale
--build=armv5tel-brewer-linux-gnueabi
--with-gmp=/home/mikpe/pkgs/linux-armv5l/gmp-4.3.2
--with-mpfr=/home/mikpe/pkgs/linux-armv5l/mpfr-2.4.2
--with-mpc=/home/mikpe/pkgs/linux-armv5l/mpc-0.8.2 --disable-plugin
--disable-lto --disable-libmudflap

[Bug ada/49539] [4.7 regression] Ada TYPES.UNRECOVERABLE_ERROR in comperr.adb:423 on ARM

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.0

[Bug ada/49539] [4.7 regression] ICE building gnattools

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2011.06.27 08:47:06
                 CC|                            |ebotcazou at gcc dot
                   |                            |gnu.org
            Summary|[4.7 regression] Ada        |[4.7 regression] ICE
                   |TYPES.UNRECOVERABLE_ERROR   |building gnattools
                   |in comperr.adb:423 on ARM   |
     Ever Confirmed|0                           |1

--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-27 08:47:06 UTC ---
> gcc-4.7-20110625 failed to bootstrap on armv5tel-linux-gnueabi due to an
> internal error in the Ada frontend:

No, most likely not.  Please post the top of the error message instead.

[Bug ada/49539] [4.7 regression] ICE building gnattools

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

--- Comment #2 from Mikael Pettersson <mikpe at it dot uu.se> 2011-06-27 09:14:49 UTC ---
(In reply to comment #1)
> > gcc-4.7-20110625 failed to bootstrap on armv5tel-linux-gnueabi due to an
> > internal error in the Ada frontend:
> 
> No, most likely not.  Please post the top of the error message instead.

Oops, sorry.  GNAT threw a 130-or-so line error message, and I mistook large
parts of it for normal 'make' output.  There's the actual error message:

../../xgcc -B../../ -c -g -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes  -gnatpg -gnata -I- -I../rts -I.
-I/mnt/scratch/gcc-4.7-20110625/gcc/ada
/mnt/scratch/gcc-4.7-20110625/gcc/ada/make.adb -o make.o
/mnt/scratch/gcc-4.7-20110625/gcc/ada/make.adb: In function
'Make.Process_Multilib':
/mnt/scratch/gcc-4.7-20110625/gcc/ada/make.adb:7353:43: warning: 'S2160b' may
be used uninitialized in this function [-Wmaybe-uninitialized]
/mnt/scratch/gcc-4.7-20110625/gcc/ada/make.adb:7353:43: warning: 'Next_Arg' may
be used uninitialized in this function [-Wmaybe-uninitialized]

Unable to coalesce ssa_names 8 and 1133 which are marked as MUST COALESCE.
comp_last_8(ab) and  comp_last_1133(ab)
+===========================GNAT BUG DETECTED==============================+
| 4.7.0 20110625 (experimental) (armv5tel-brewer-linux-gnueabi) GCC error: |
| SSA corruption                                                           |
| Error detected around /mnt/scratch/gcc-4.7-20110625/gcc/ada/make.adb:2841:7|
| Please submit a bug report; see http://gcc.gnu.org/bugs.html.            |
| Use a subject line meaningful to you and us to track the bug.            |
| Include the entire contents of this bug box in the report.               |
| Include the exact gcc or gnatmake command that you entered.              |
| Also include sources listed below in gnatchop format                     |
| (concatenated together with no headers between files).                   |
+==========================================================================+

Please include these source files with error report
Note that list may not be accurate in some cases,
so please double check that the problem can still
be reproduced with the set of files listed.
Consider also -gnatd.n switch (see debug.adb).

../rts/system.ads
/mnt/scratch/gcc-4.7-20110625/gcc/ada/make.adb
/mnt/scratch/gcc-4.7-20110625/gcc/ada/make.ads
/mnt/scratch/gcc-4.7-20110625/gcc/ada/ali.ads
/mnt/scratch/gcc-4.7-20110625/gcc/ada/casing.ads
/mnt/scratch/gcc-4.7-20110625/gcc/ada/types.ads
...
(and on and on and on and on ...)
...
/mnt/scratch/gcc-4.7-20110625/gcc/ada/scng.ads
../rts/a-chahan.ads


raised TYPES.UNRECOVERABLE_ERROR : comperr.adb:423
make[3]: *** [make.o] Error 1
make[3]: Leaving directory `/mnt/scratch/objdir47/gcc/ada/tools'
make[2]: *** [gnattools-native] Error 2
make[2]: Leaving directory `/mnt/scratch/objdir47/gnattools'
make[1]: *** [all-gnattools] Error 2
make[1]: Leaving directory `/mnt/scratch/objdir47'
make: *** [bootstrap] Error 2

I'm currently trying to narrow down the origin of this failure.

[Bug ada/49539] [4.7 regression] ICE building gnattools

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-27 11:15:22 UTC ---
I can reproduce on x86-linux with a bit of tweaking.  Reducing...

[Bug ada/49539] [4.7 regression] ICE building gnattools

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

--- Comment #4 from Mikael Pettersson <mikpe at it dot uu.se> 2011-06-27 16:51:46 UTC ---
4.7-20110618 failed to bootstrap with the same error.

[Bug ada/49539] [4.7 regression] ICE building gnattools

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |ebotcazou at gcc dot
                   |gnu.org                     |gnu.org

--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-27 23:24:20 UTC ---
Thanks.  Investigating.

[Bug tree-optimization/49539] [4.7 regression] ICE building gnattools

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|ada                         |tree-optimization

--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-28 20:47:10 UTC ---
Recategorizing.

[Bug tree-optimization/49539] [4.7 regression] ICE building gnattools

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-29 16:03:00 UTC ---
Author: ebotcazou
Date: Wed Jun 29 16:02:56 2011
New Revision: 175650

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=175650
Log:
    PR tree-optimization/49539
    * tree-ssa-forwprop.c (can_propagate_from): Check for abnormal SSA
    names by means of stmt_references_abnormal_ssa_name.
    (associate_plusminus): Call can_propagate_from before propagating
    from definition statements.
    (ssa_forward_propagate_and_combine): Remove superfluous newline.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-forwprop.c

[Bug tree-optimization/49539] [4.7 regression] ICE building gnattools

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-29 16:04:51 UTC ---
Author: ebotcazou
Date: Wed Jun 29 16:04:47 2011
New Revision: 175651

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=175651
Log:
    PR tree-optimization/49539
    * tree-ssa-forwprop.c (can_propagate_from): Check for abnormal SSA
    names by means of stmt_references_abnormal_ssa_name.
    (associate_plusminus): Call can_propagate_from before propagating
    from definition statements.

Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/tree-ssa-forwprop.c

[Bug tree-optimization/49539] [4.7 regression] ICE building gnattools

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49539

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|4.7.0                       |4.6.2

--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-29 16:07:36 UTC ---
Thanks for reporting the problem.