[Bug target/70355] New: ICE: in simplify_subreg_concatn, at lower-subreg.c:617 with -funroll-loops -mavx512f

zsojka at seznam dot cz gcc-bugzilla@gcc.gnu.org
Tue Mar 22 11:51:00 GMT 2016


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70355

            Bug ID: 70355
           Summary: ICE: in simplify_subreg_concatn, at lower-subreg.c:617
                    with -funroll-loops -mavx512f
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
            Target: x86_64-pc-linux-gnu

Created attachment 38056
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38056&action=edit
reduced testcase

Compiler output:
$ gcc -O2 -fno-tree-ter -funroll-loops -mavx512f -g testcase.c 
testcase.c: In function 'foo':
testcase.c:11:1: internal compiler error: in simplify_subreg_concatn, at
lower-subreg.c:617
 }
 ^
0x14b7f6b simplify_subreg_concatn
        /repo/gcc-trunk/gcc/lower-subreg.c:617
0x14bad95 resolve_debug
        /repo/gcc-trunk/gcc/lower-subreg.c:1139
0x14bad95 decompose_multiword_subregs
        /repo/gcc-trunk/gcc/lower-subreg.c:1540
0x14bbd1d execute
        /repo/gcc-trunk/gcc/lower-subreg.c:1735
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=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-234373-checking-yes-rtl-df-nographite/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-234373-checking-yes-rtl-df-nographite
Thread model: posix
gcc version 6.0.0 20160321 (experimental) (GCC) 

Tested revisions:
trunk r234373 - FAIL
5-branch r234375 - FAIL


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