[Bug rtl-optimization/60079] New: [LRA] ICE when compiling attached case.

[Bug rtl-optimization/60079] New: [LRA] ICE when compiling attached case.

[belagod at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60079

            Bug ID: 60079
           Summary: [LRA] ICE when compiling attached case.
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: belagod at gcc dot gnu.org

When the attached case is compiled with -O2 for AArch64, LRA ICEs thus:

$ ../install/bin/aarch64-none-elf-gcc -O2 besttry.c -c
besttry.c: In function 'ripemd160_block_data_order':
besttry.c:936:1: internal compiler error: in update_reg_eliminate, at
lra-eliminations.c:1157
 }
 ^
0x899638 update_reg_eliminate
        /work/aarch64/src/svn-trunk//gcc/gcc/lra-eliminations.c:1157
0x89ad3c lra_eliminate(bool, bool)
        /work/aarch64/src/svn-trunk//gcc/gcc/lra-eliminations.c:1387
0x897436 lra_constraints(bool)
        /work/aarch64/src/svn-trunk//gcc/gcc/lra-constraints.c:3974
0x8863bc lra(_IO_FILE*)
        /work/aarch64/src/svn-trunk//gcc/gcc/lra.c:2339
0x849f96 do_reload
        /work/aarch64/src/svn-trunk//gcc/gcc/ira.c:5457
0x84ac38 rest_of_handle_reload
        /work/aarch64/src/svn-trunk//gcc/gcc/ira.c:5598
0x84ac38 execute
        /work/aarch64/src/svn-trunk//gcc/gcc/ira.c:5627
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.


My configure:

.../gcc/configure --target=aarch64-none-elf --prefix=.../install
--with-gmp=.../host-tools --with-mpfr=.../host-tools --with-mpc=.../host-tools
--with-pkgversion=unknown --disable-shared --disable-nls --disable-threads
--disable-tls --enable-checking=yes --enable-languages=c,c++ --with-newlib

Sorry, I couldn't reduce the test case any further - commenting any line in
besttry.c makes the ICE go away.

[Bug rtl-optimization/60079] [LRA] ICE when compiling attached case.

[belagod at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60079

--- Comment #1 from Tejas Belagod <belagod at gcc dot gnu.org> ---
Created attachment 32053
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32053&action=edit
Reduced test case for LRA ICE.

[Bug rtl-optimization/60079] [LRA] ICE when compiling attached case.

[vmakarov at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60079

Vladimir Makarov <vmakarov at gcc dot gnu.org> changed:

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

--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Tejas Belagod from comment #1)
> Created attachment 32053 [details]
> Reduced test case for LRA ICE.

Sorry, I can not reproduce it on the today trunk (I tried -O[0-3] including
-O2).

[Bug rtl-optimization/60079] [LRA] ICE when compiling attached case.

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60079

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2014-07-02
                 CC|                            |ktkachov at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #3 from ktkachov at gcc dot gnu.org ---
I can't reproduce this with current trunk either.
Tejas, do you think this can be closed?

[Bug rtl-optimization/60079] [LRA] ICE when compiling attached case.

[belagod at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60079

--- Comment #4 from Tejas Belagod <belagod at gcc dot gnu.org> ---
(In reply to ktkachov from comment #3)
> I can't reproduce this with current trunk either.
> Tejas, do you think this can be closed?

I remember the ICE was quite sensitive to any small change to the test case. If
you can't reproduce this, fair enough, it might have been fixed or gone latent.
I hope it's been fixed. :-)

[Bug rtl-optimization/60079] [LRA] ICE when compiling attached case.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60079

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/newlib/libc/stdlib/strtol.c:
In function ‘_strtol_r’:
/data1/src/gcc-cavium/toolchain-thunder/scripts/../src/newlib/libc/stdlib/strtol.c:213:1:
internal compiler error: in update_reg_eliminate, at lra-eliminations.c:1202
 }
 ^
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Subject: [Bug rtl-optimization/60079] [LRA] ICE when compiling attached case.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id`079

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note my testcase is with -mabi=ilp32 too.

[Bug rtl-optimization/60079] [LRA] ICE when compiling attached case.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60079

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I can't get a testcase that fails with the non-modified trunk.

[Bug rtl-optimization/60079] [LRA] ICE when compiling attached case.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60079

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #9)
> I can't get a testcase that fails with the non-modified trunk.

My problem was just introduced.

The original problem should have been resolved with:
https://gcc.gnu.org/ml/gcc-patches/2013-12/msg00151.html

so still waiting.