[Bug testsuite/54139] New: [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[Bug testsuite/54139] New: [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

             Bug #: 54139
           Summary: [4.8 regression] some ARM Thumb-2 tests appear to be
                    run on ARMv5TE hardware causing unhandled exceptions
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mikpe@it.uu.se


Bootstrapping gcc-4.8 on armv5tel-linux-gnueabi and running the test suite now
results in kernel messages about unhandled exceptions from (what appears to be)
Thumb-2 specific test cases:

Alignment trap: ftest-armv6t2-t (1910) PC=0x0000842e Instr=0x3304601a
Address=0x00008501 FSR 0x801
Alignment trap: not handling instruction 3304601a at [<0000842e>]
Unhandled fault: alignment exception (0x801) at 0x00008501
Alignment trap: ftest-armv7a-th (1982) PC=0x0000842e Instr=0x3304601a
Address=0x00008509 FSR 0x801
Alignment trap: not handling instruction 3304601a at [<0000842e>]
Unhandled fault: alignment exception (0x801) at 0x00008509
Alignment trap: ftest-armv7r-th (2042) PC=0x0000842e Instr=0x3304601a
Address=0x00008509 FSR 0x801
Alignment trap: not handling instruction 3304601a at [<0000842e>]
Unhandled fault: alignment exception (0x801) at 0x00008509

The program names are truncated, but clearly correspond to
ftest-armv6t2-thumb.c, ftest-armv7a-thumb.c, and ftest-armv7r-thumb.c in
gcc/testsuite/gcc.target/arm/.

This seems to have started some time between 20120624 and 20120701.  The test
suite results between those two dates show:

+FAIL: gcc.target/arm/ftest-armv6t2-thumb.c execution test
+FAIL: gcc.target/arm/ftest-armv7a-thumb.c execution test
+FAIL: gcc.target/arm/ftest-armv7r-thumb.c execution test

As the same time ARM's mmx-2.c test case started failing at compile-time:

+FAIL: gcc.target/arm/mmx-2.c (test for excess errors)

and a look in the detailed log show 100+ lines of warnings and errors related
to numerous __builtin_arm_${foo} not being recognized.

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.8.0

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.8.0
           Priority|P3                          |P1

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-10-23
                 CC|                            |ramana at gcc dot gnu.org
     Ever Confirmed|0                           |1

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[aldyh at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

Aldy Hernandez <aldyh at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aldyh at gcc dot gnu.org
         AssignedTo|unassigned at gcc dot       |aldyh at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #1 from Aldy Hernandez <aldyh at gcc dot gnu.org> 2013-01-10 19:31:42 UTC ---
I'll take a look.

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[aldyh at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

--- Comment #2 from Aldy Hernandez <aldyh at gcc dot gnu.org> 2013-01-11 18:01:57 UTC ---
I have built a cross cc1/cc1plus with:

blah/configure --enable-languages=c,c++ --target=armv5tel-unknown-linux-gnueabi

but I get a totally different error on testsuite/gcc.target/arm/mmx-2.c, not
the unrecognized __builtin_arm* errors reported.  I get an IRA ice:

cp /source_dir/gcc/testsuite/gcc.target/arm/mmx-2.c a.c
./cc1 -quiet -mcpu=iwmmxt -flax-vector-conversions -std=gnu99 a.c -I /tmp
a.c: In function 'foo':
a.c:166:1: internal compiler error: in find_costs_and_classes, at
ira-costs.c:1710
 }
 ^
0x7a7fdf find_costs_and_classes
        /source/gcc/gcc/ira-costs.c:1709
0x7a8147 ira_costs()
        /source/gcc/gcc/ira-costs.c:2043
0x7a321c ira_build()
        /source/gcc/gcc/ira-build.c:3195
0x79bc0b ira
        /source/gcc/gcc/ira.c:4475
0x79bc0b rest_of_handle_ira
        /source/gcc/gcc/ira.c:4709
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Unrecognized __builtin* sound like -mcpu=iwmmxt is not being passed to the
compiler command line.

Can you try "make check-gcc RUNTESTFLAGS=arm.exp" in your build/gcc directory
and attach the the entire gcc/testsuite/gcc/gcc.log file?

And just for kicks, could you include the result from:

/build_directory$ grep 'with options' config.status

and

/build_directory$ grep 'with options' gcc/config.status

This would help enormously, as I don't have an armv5tel machine to test on.

Thanks.

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-01-15 09:25:45 UTC ---
http://gcc.gnu.org/ml/gcc-testresults/2013-01/msg01425.html
as an example of armv5tel-*-linux-gnueabi shows
FAIL: gcc.target/arm/ftest-armv6t2-arm.c execution test
FAIL: gcc.target/arm/ftest-armv6t2-thumb.c execution test
FAIL: gcc.target/arm/ftest-armv7a-arm.c execution test
FAIL: gcc.target/arm/ftest-armv7a-thumb.c execution test
FAIL: gcc.target/arm/ftest-armv7r-arm.c execution test
FAIL: gcc.target/arm/ftest-armv7r-thumb.c execution test
(not sure on what hw has it been run) and
http://gcc.gnu.org/ml/gcc-testresults/2013-01/msg01494.html
(armv7hl-*-linux-gnueabi), which shows
FAIL: gcc.target/arm/ftest-armv4t-thumb.c (test for excess errors)
UNRESOLVED: gcc.target/arm/ftest-armv4t-thumb.c compilation failed to produce
executable
FAIL: gcc.target/arm/ftest-armv5t-thumb.c (test for excess errors)
UNRESOLVED: gcc.target/arm/ftest-armv5t-thumb.c compilation failed to produce
executable
FAIL: gcc.target/arm/ftest-armv5te-thumb.c (test for excess errors)
UNRESOLVED: gcc.target/arm/ftest-armv5te-thumb.c compilation failed to produce
executable
FAIL: gcc.target/arm/ftest-armv6-thumb.c (test for excess errors)
UNRESOLVED: gcc.target/arm/ftest-armv6-thumb.c compilation failed to produce
executable
FAIL: gcc.target/arm/ftest-armv6k-thumb.c (test for excess errors)
UNRESOLVED: gcc.target/arm/ftest-armv6k-thumb.c compilation failed to produce
executable
FAIL: gcc.target/arm/ftest-armv6z-thumb.c (test for excess errors)
UNRESOLVED: gcc.target/arm/ftest-armv6z-thumb.c compilation failed to produce
executable
FAIL: gcc.target/arm/mmx-2.c (internal compiler error)
FAIL: gcc.target/arm/mmx-2.c (test for excess errors)

All these tests are new for 4.8 and all test new functionality in 4.8, so the
regression status (beyond having some extra FAILs) is questionable.

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[aldyh at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

--- Comment #4 from Aldy Hernandez <aldyh at gcc dot gnu.org> 2013-01-15 15:49:04 UTC ---
Perhaps this is a duplicate of PR55780?  If it is, there is already a proposed
patch here:

http://gcc.gnu.org/ml/gcc-patches/2012-12/msg01339.html

which has been pinged here:

http://gcc.gnu.org/ml/gcc-patches/2013-01/msg00749.html

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[janis at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

Janis Johnson <janis at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |janis at gcc dot gnu.org

--- Comment #5 from Janis Johnson <janis at gcc dot gnu.org> 2013-01-15 16:32:54 UTC ---
There are 3 separate problems described in this PR.

The first is about the effective target tests used by gcc.target/arm and is a
duplicate of PR55780.

The second, the ICE for test mmx-2.c, is described in PR54338.

The third is for failures like "FAIL: gcc.c-torture/execute/builtins/memset.c
compilation,  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects" that fail to
link due to multiple definitions of memset or strlen; I see this for
arm-none-eabi (and I think some other EABI targets) but not for GNU/Linux
targets.  The same tests fail for GCC 4.7 so it's not a regression.  I'll file
a PR if there isn't one already.

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[aldyh at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

--- Comment #6 from Aldy Hernandez <aldyh at redhat dot com> 2013-01-15 16:49:24 UTC ---
> The third is for failures like "FAIL: gcc.c-torture/execute/builtins/memset.c
> compilation,  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects" that fail to
> link due to multiple definitions of memset or strlen; I see this for
> arm-none-eabi (and I think some other EABI targets) but not for GNU/Linux
> targets.  The same tests fail for GCC 4.7 so it's not a regression.  I'll file
> a PR if there isn't one already.
>

Janis, please do.  This way we can close this PR as the duplicate of 3 
individual PRs.

Thank you so much.

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[aldyh at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

--- Comment #7 from Aldy Hernandez <aldyh at gcc dot gnu.org> 2013-01-15 16:51:54 UTC ---
Oh Janis, and when you do, please reference the new PR here so we can close
this PR in deference to those 3 individual PRs.

Thanks.

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[janis at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

--- Comment #8 from Janis Johnson <janis at gcc dot gnu.org> 2013-01-15 17:11:40 UTC ---
The gcc.c-torture/execute/builtins failures with LTO options are now covered by
PR55994.

[Bug testsuite/54139] [4.8 regression] some ARM Thumb-2 tests appear to be run on ARMv5TE hardware causing unhandled exceptions

[aldyh at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54139

Aldy Hernandez <aldyh at gcc dot gnu.org> changed:

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

--- Comment #9 from Aldy Hernandez <aldyh at gcc dot gnu.org> 2013-01-15 17:15:23 UTC ---
Alright...so this is a duplicate of PR55780, PR54338, PR55994.  Closing PR.