[Bug rtl-optimization/111754] New: [14 Regression] ICE: in decompose, at rtl.h:2313 at -O

["zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111754

            Bug ID: 111754
           Summary: [14 Regression] ICE: in decompose, at rtl.h:2313 at -O
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          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

Created attachment 56088
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56088&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O testcase.c
during RTL pass: expand
testcase.c: In function 'foo':
testcase.c:14:10: internal compiler error: in decompose, at rtl.h:2313
   14 |   return bar ((F){9}, (F){});
      |          ^~~~~~~~~~~~~~~~~~~
0x7ea1ba wi::int_traits<std::pair<rtx_def*, machine_mode> >::decompose(long*,
unsigned int, std::pair<rtx_def*, machine_mode> const&)
        /repo/gcc-trunk/gcc/rtl.h:2313
0x7ea1ba wide_int_ref_storage<false,
false>::wide_int_ref_storage<std::pair<rtx_def*, machine_mode>
>(std::pair<rtx_def*, machine_mode> const&)
        /repo/gcc-trunk/gcc/wide-int.h:1030
0x7ea1ba generic_wide_int<wide_int_ref_storage<false, false>
>::generic_wide_int<std::pair<rtx_def*, machine_mode> >(std::pair<rtx_def*,
machine_mode> const&)
        /repo/gcc-trunk/gcc/wide-int.h:788
0x7ea1ba poly_int<1u, generic_wide_int<wide_int_ref_storage<false, false> >
>::poly_int<std::pair<rtx_def*, machine_mode> >(poly_int_full,
std::pair<rtx_def*, machine_mode> const&)
        /repo/gcc-trunk/gcc/poly-int.h:453
0x7ea1ba poly_int<1u, generic_wide_int<wide_int_ref_storage<false, false> >
>::poly_int<std::pair<rtx_def*, machine_mode> >(std::pair<rtx_def*,
machine_mode> const&)
        /repo/gcc-trunk/gcc/poly-int.h:439
0x7ea1ba wi::to_poly_wide(rtx_def const*, machine_mode)
        /repo/gcc-trunk/gcc/rtl.h:2382
0x7ea1ba rtx_vector_builder::step(rtx_def*, rtx_def*) const
        /repo/gcc-trunk/gcc/rtx-vector-builder.h:122
0x143d95b vector_builder<rtx_def*, machine_mode,
rtx_vector_builder>::elt(unsigned int) const
        /repo/gcc-trunk/gcc/vector-builder.h:254
0x143d841 rtx_vector_builder::build()
        /repo/gcc-trunk/gcc/rtx-vector-builder.cc:73
0x107c7a1 const_vector_from_tree
        /repo/gcc-trunk/gcc/expr.cc:13494
0x10856ce expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /repo/gcc-trunk/gcc/expr.cc:11066
0xf50792 expand_expr(tree_node*, rtx_def*, machine_mode, expand_modifier)
        /repo/gcc-trunk/gcc/expr.h:310
0xf50792 expand_return
        /repo/gcc-trunk/gcc/cfgexpand.cc:3809
0xf50792 expand_gimple_stmt_1
        /repo/gcc-trunk/gcc/cfgexpand.cc:3918
0xf50792 expand_gimple_stmt
        /repo/gcc-trunk/gcc/cfgexpand.cc:4044
0xf51106 expand_gimple_basic_block
        /repo/gcc-trunk/gcc/cfgexpand.cc:6100
0xf5378e execute
        /repo/gcc-trunk/gcc/cfgexpand.cc:6835
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> 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-r14-4521-20231009151152-g08d0f840dc7-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/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
--with-cloog --with-ppl --with-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-r14-4521-20231009151152-g08d0f840dc7-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231009 (experimental) (GCC)