[Bug ipa/78515] New: [7 Regression] ICE: in fold_binary_loc, at fold-const.c:8999 with -Os -mavx512bw

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78515

            Bug ID: 78515
           Summary: [7 Regression] ICE: in fold_binary_loc, at
                    fold-const.c:8999 with -Os -mavx512bw
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu
             Build: x86_64-pc-linux-gnu

Created attachment 40143
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40143&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -Os -mavx512bw testcase.c
testcase.c:23:1: internal compiler error: in fold_binary_loc, at
fold-const.c:8999
 }
 ^
0x8abc6e fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
        /repo/gcc-trunk/gcc/fold-const.c:8996
0x152f1a5 ipa_get_jf_pass_through_result
        /repo/gcc-trunk/gcc/ipa-cp.c:1233
0x1534c46 propagate_vals_accross_pass_through
        /repo/gcc-trunk/gcc/ipa-cp.c:1572
0x1534c46 propagate_scalar_accross_jump_function
        /repo/gcc-trunk/gcc/ipa-cp.c:1654
0x1534c46 propagate_constants_accross_call
        /repo/gcc-trunk/gcc/ipa-cp.c:2257
0x1538900 propagate_constants_topo
        /repo/gcc-trunk/gcc/ipa-cp.c:3162
0x1538900 ipcp_propagate_stage
        /repo/gcc-trunk/gcc/ipa-cp.c:3272
0x153ad76 ipcp_driver
        /repo/gcc-trunk/gcc/ipa-cp.c:5002
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.

$ x86_64-pc-linux-gnu-gcc -v                       
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-242789-checking-yes-rtl-df-extra-nographite-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--without-cloog --without-ppl --without-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-242789-checking-yes-rtl-df-extra-nographite-amd64
Thread model: posix
gcc version 7.0.0 20161123 (experimental) (GCC)