[Bug bootstrap/67474] New: [6 regression] tree-vect-loop.c:2759:1: error: insn does not satisfy its constraints breaks ARM bootstrap

[Bug bootstrap/67474] New: [6 regression] tree-vect-loop.c:2759:1: error: insn does not satisfy its constraints breaks ARM bootstrap

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67474

            Bug ID: 67474
           Summary: [6 regression] tree-vect-loop.c:2759:1: error: insn
                    does not satisfy its constraints breaks ARM bootstrap
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mikpelinux at gmail dot com
  Target Milestone: ---

Attempting to bootstrap gcc-6-20150906 on armv7l w/ hard float fails with:

/mnt/scratch/gcc-6-20150906/gcc/tree-vect-loop.c: In function
'gimple_statement_base* vect_is_simple_reduction_1(loop_vec_info, gimple, bool,
bool*, bool, bool)':
/mnt/scratch/gcc-6-20150906/gcc/tree-vect-loop.c:2759:1: error: insn does not
satisfy its constraints:
 }
 ^
(insn 1036 3379 1037 177 (parallel [
            (set (reg/v/f:SI 3 r3 [orig:110 def1 ] [110])
                (and:SI (ne:SI (reg/v/f:SI 3 r3 [orig:110 def1 ] [110])
                        (const_int 0 [0]))
                    (eq:SI (reg/v/f:SI 3 r3 [orig:110 def1 ] [110])
                        (reg/v/f:SI 5 r5 [orig:251 phi ] [251]))))
            (clobber (reg:CC 100 cc))
        ]) /mnt/scratch/gcc-6-20150906/gcc/tree-vect-loop.c:2706 260
{*and_scc_scc_nodom}
     (nil))
/mnt/scratch/gcc-6-20150906/gcc/tree-vect-loop.c:2759:1: internal compiler
error: in extract_constrain_insn, at recog.c:2200
0x76dcbb _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /mnt/scratch/gcc-6-20150906/gcc/rtl-error.c:109
0x76dd27 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /mnt/scratch/gcc-6-20150906/gcc/rtl-error.c:120
0x7169b7 extract_constrain_insn(rtx_insn*)
        /mnt/scratch/gcc-6-20150906/gcc/recog.c:2200
0x6e72fb reload_cse_simplify_operands
        /mnt/scratch/gcc-6-20150906/gcc/postreload.c:408
0x6e699b reload_cse_simplify
        /mnt/scratch/gcc-6-20150906/gcc/postreload.c:194
0x6e6a87 reload_cse_regs_1
        /mnt/scratch/gcc-6-20150906/gcc/postreload.c:233
0x6e6523 reload_cse_regs
        /mnt/scratch/gcc-6-20150906/gcc/postreload.c:81
0x6ed56b execute
        /mnt/scratch/gcc-6-20150906/gcc/postreload.c:2350
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.
make[3]: *** [tree-vect-loop.o] Error 1
make[3]: *** Waiting for unfinished jobs....
rm fsf-funding.pod gcov.pod cpp.pod gfdl.pod gpl.pod gcc.pod gcov-tool.pod
make[3]: Leaving directory `/mnt/scratch/objdir6/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `/mnt/scratch/objdir6'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/mnt/scratch/objdir6'
make: *** [bootstrap] Error 2

The previous weekly snapshot gcc-6-20150830 bootstrapped fine.

Configuration:
/mnt/scratch/gcc-6-20150906/configure --prefix=/mnt/scratch/install6
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=gnu --enable-languages=c,c++,ada
--enable-initfini-array --disable-lto --disable-plugin --disable-libmudflap
--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
--without-isl --without-cloog --disable-sjlj-exceptions --with-arch=armv7-a
--with-tune=cortex-a9 --with-float=hard --with-fpu=vfpv3-d16
--build=armv7l-unknown-linux-gnueabi
--with-gmp=/home/mikpe/pkgs/linux-armv7l/gmp-6.0.0
--with-mpfr=/home/mikpe/pkgs/linux-armv7l/mpfr-3.1.3
--with-mpc=/home/mikpe/pkgs/linux-armv7l/mpc-1.0.3

[Bug target/67474] [6 regression] tree-vect-loop.c:2759:1: error: insn does not satisfy its constraints breaks ARM bootstrap

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67474

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |6.0

[Bug target/67474] [6 regression] tree-vect-loop.c:2759:1: error: insn does not satisfy its constraints breaks ARM bootstrap

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67474

--- Comment #1 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Still occurs with gcc-6-20150920.

[Bug target/67474] [6 regression] tree-vect-loop.c:2759:1: error: insn does not satisfy its constraints breaks ARM bootstrap

[ramana at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67474

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

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

--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Adding vlad to CC list. Mikael, could you put in a pre-processed testcase for
folks to look at reproducing with a cross rather than reproducing this with a
full bootstrap ?


Eyeballing the pattern doesn't show anything obviously wrong in the constraints
so this may well be an LRA issue.

[Bug target/67474] [6 regression] tree-vect-loop.c:2759:1: error: insn does not satisfy its constraints breaks ARM bootstrap

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67474

ktkachov at gcc dot gnu.org changed:

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

--- Comment #4 from ktkachov at gcc dot gnu.org ---
I suspect this is the same as PR 67756

[Bug target/67474] [6 regression] tree-vect-loop.c:2759:1: error: insn does not satisfy its constraints breaks ARM bootstrap

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67474

--- Comment #5 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to ktkachov from comment #4)
> I suspect this is the same as PR 67756

I guess so too.  I am going to commit a patch today.

[Bug target/67474] [6 regression] tree-vect-loop.c:2759:1: error: insn does not satisfy its constraints breaks ARM bootstrap

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67474

Mikael Pettersson <mikpelinux at gmail dot com> changed:

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

--- Comment #6 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Bootstrap succeeded at r228462 (gcc-6-20151004).