[Bug bootstrap/55321] New: [4.8 regression] Ada bootstrap failure on armv5tel-linux-gnueabi

[Bug bootstrap/55321] New: [4.8 regression] Ada bootstrap failure on armv5tel-linux-gnueabi

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55321

             Bug #: 55321
           Summary: [4.8 regression] Ada bootstrap failure on
                    armv5tel-linux-gnueabi
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mikpe@it.uu.se


Attempting to bootstrap gcc-4.8-20121111 on armv5tel-linux-gnueabi w/ Ada fails
with:

/mnt/scratch/objdir48/./gcc/xgcc -B/mnt/scratch/objdir48/./gcc/
-B/mnt/scratch/install48/armv5tel-unknown-linux-gnueabi/bin/
-B/mnt/scratch/install48/armv5tel-unknown-linux-gnueabi/lib/ -isystem
/mnt/scratch/install48/armv5tel-unknown-linux-gnueabi/include -isystem
/mnt/scratch/install48/armv5tel-unknown-linux-gnueabi/sys-include    -c -g -O2 
-fPIC  -W -Wall -gnatpg -nostdinc   s-stposu.adb -o s-stposu.o
s-stposu.ads: In function
'System.Storage_Pools.Subpools.Root_Storage_Pool_With_Subpoolsdf':
s-stposu.ads:198:9: warning: 'A40s' may be used uninitialized in this function
[-Wmaybe-uninitialized]
s-stposu.ads: In function 'System.Storage_Pools.Subpools.Root_Subpooldf':
s-stposu.ads:240:9: warning: 'A69s' may be used uninitialized in this function
[-Wmaybe-uninitialized]
+===========================GNAT BUG DETECTED==============================+
| 4.8.0 20121111 (experimental) (armv5tel-unknown-linux-gnueabi) GCC error:|
| in merge_latch_edges, at cfgloop.c:678                                   |
| Error detected around s-stposu.adb:565:8                                 |
| 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).

system.ads
s-stposu.adb
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raised TYPES.UNRECOVERABLE_ERROR : comperr.adb:432
make[7]: *** [s-stposu.o] Error 1
make[7]: Leaving directory `/mnt/scratch/objdir48/gcc/ada/rts'
make[6]: *** [gnatlib] Error 2
make[6]: Leaving directory `/mnt/scratch/objdir48/gcc/ada'
make[5]: *** [gnatlib-shared-default] Error 2
make[5]: Leaving directory `/mnt/scratch/objdir48/gcc/ada'
make[4]: *** [gnatlib-shared-dual] Error 2
make[4]: Leaving directory `/mnt/scratch/objdir48/gcc/ada'
make[3]: *** [gnatlib-shared] Error 2
make[3]: Leaving directory `/mnt/scratch/objdir48/gcc/ada'
make[2]: *** [gnatlib-shared] Error 2
make[2]: Leaving directory
`/mnt/scratch/objdir48/armv5tel-unknown-linux-gnueabi/libada'
make[1]: *** [all-target-libada] Error 2
make[1]: Leaving directory `/mnt/scratch/objdir48'
make: *** [bootstrap] Error 2

4.8-20121028 succeeded to bootstrap so this is a recent regression.

Full configuration parameters:
/mnt/scratch/gcc-4.8-20121111/configure --prefix=/mnt/scratch/install48
--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
--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-unknown-linux-gnueabi --disable-plugin --disable-lto
--disable-libmudflap

[Bug bootstrap/55321] [4.8 regression] Ada bootstrap failure on armv5tel-linux-gnueabi

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55321

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2012-11-14
         AssignedTo|unassigned at gcc dot       |ebotcazou at gcc dot
                   |gnu.org                     |gnu.org
   Target Milestone|---                         |4.8.0
     Ever Confirmed|0                           |1

--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-11-14 20:56:53 UTC ---
This occurs with just -gnatpg -O.  Investigating...

[Bug middle-end/55321] [4.8 regression] Ada bootstrap failure on armv5tel-linux-gnueabi

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55321

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|bootstrap                   |middle-end

--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-11-15 17:36:27 UTC ---
Are you really sure about the 20121028 date?

[Bug middle-end/55321] [4.8 regression] Ada bootstrap failure on armv5tel-linux-gnueabi

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55321

--- Comment #3 from Mikael Pettersson <mikpe at it dot uu.se> 2012-11-15 18:47:31 UTC ---
(In reply to comment #2)
> Are you really sure about the 20121028 date?

Yes, 4.8-20121012 aka r192660 built fine, 20121104 and 20121111 failed;
unfortunately I don't have the 20121104 build log any more so I can't check
exactly how it failed.

Do you want me to run a bisection?

[Bug middle-end/55321] [4.8 regression] Ada bootstrap failure on armv5tel-linux-gnueabi

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55321

--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-11-15 18:56:21 UTC ---
> Yes, 4.8-20121012 aka r192660 built fine, 20121104 and 20121111 failed;
> unfortunately I don't have the 20121104 build log any more so I can't check
> exactly how it failed.

The reduced testcase fails with the 20121027 sources for me.

> Do you want me to run a bisection?

That's probably superfluous, I have a reasonable fix.

[Bug middle-end/55321] [4.8 regression] Ada bootstrap failure on armv5tel-linux-gnueabi

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55321

--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-11-29 22:58:37 UTC ---
Author: ebotcazou
Date: Thu Nov 29 22:58:23 2012
New Revision: 193973

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193973
Log:
    PR middle-end/55321
    * calls.c (emit_library_call_value_1): Mark as no-nonlocal if no-throw.

Added:
    trunk/gcc/testsuite/gnat.dg/loop_optimization14.adb
    trunk/gcc/testsuite/gnat.dg/loop_optimization14.ads
    trunk/gcc/testsuite/gnat.dg/loop_optimization14_pkg.ads
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/calls.c
    trunk/gcc/testsuite/ChangeLog

[Bug middle-end/55321] [4.8 regression] Ada bootstrap failure on armv5tel-linux-gnueabi

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55321

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

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

--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-11-29 23:37:15 UTC ---
Thanks for reporting the problem.