[Bug target/64617] New: ICE: Max. number of generated reload insns per insn is achieved (90) with -ftree-vectorize -mavx512bw -march=slm

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64617

            Bug ID: 64617
           Summary: ICE: Max. number of generated reload insns per insn is
                    achieved (90) with -ftree-vectorize -mavx512bw
                    -march=slm
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 34458
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34458&action=edit
reduced testcase

Compiler output:
$ gcc -O -ftree-vectorize -mavx512bw -march=slm testcase.c
testcase.c: In function 'foo':
testcase.c:34:1: internal compiler error: Max. number of generated reload insns
per insn is achieved (90)

 }
 ^
0xadff12 lra_constraints(bool)
        /mnt/svn/gcc-trunk/gcc/lra-constraints.c:4307
0xacb97b lra(_IO_FILE*)
        /mnt/svn/gcc-trunk/gcc/lra.c:2280
0xa7ad91 do_reload
        /mnt/svn/gcc-trunk/gcc/ira.c:5407
0xa7ad91 execute
        /mnt/svn/gcc-trunk/gcc/ira.c:5578
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.

$ gcc -v                                                  
Using built-in specs.
COLLECT_GCC=/mnt/svn/gcc-trunk/binary-latest/bin/gcc
COLLECT_LTO_WRAPPER=/mnt/svn/gcc-trunk/binary-219632-lto-fortran-checking-yes-rtl-df/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /mnt/svn/gcc-trunk//configure --enable-checking=yes,rtl,df
--enable-languages=c,c++,lto,fortran
--prefix=/mnt/svn/gcc-trunk/binary-219632-lto-fortran-checking-yes-rtl-df/
--without-cloog --without-ppl
Thread model: posix
gcc version 5.0.0 20150115 (experimental) (GCC) 

Tested revisions:
r219632 - ICE