[Bug target/114016] New: ICE: in AT_unsigned, at dwarf2out.cc:4592 with -march=armv9-a -gbtf or -gctf

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114016

            Bug ID: 114016
           Summary: ICE: in AT_unsigned, at dwarf2out.cc:4592 with
                    -march=armv9-a -gbtf or -gctf
           Product: gcc
           Version: 14.0
            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: ---
              Host: x86_64-pc-linux-gnu
            Target: aarch64-unknown-linux-gnu

Created attachment 57473
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57473&action=edit
reduced testcase

Compiler output:
$ aarch64-unknown-linux-gnu-gcc -march=armv9-a -gbtf testcase.c 
testcase.c:2:1: internal compiler error: in AT_unsigned, at dwarf2out.cc:4592
    2 | void fn_f64x4(svfloat64x4_t) {}
      | ^~~~
0x7a2627 AT_unsigned(dw_attr_struct*)
        /repo/gcc-trunk/gcc/dwarf2out.cc:4592
0x7a433d AT_unsigned(dw_attr_struct*)
        /repo/gcc-trunk/gcc/dwarf2out.cc:4591
0xe43aee ctf_die_bitsize
        /repo/gcc-trunk/gcc/dwarf2ctf.cc:211
0xe4463e gen_ctf_sou_type
        /repo/gcc-trunk/gcc/dwarf2ctf.cc:526
0xe43f07 gen_ctf_type
        /repo/gcc-trunk/gcc/dwarf2ctf.cc:892
0xe43cc7 gen_ctf_function_type
        /repo/gcc-trunk/gcc/dwarf2ctf.cc:718
0xe44b53 gen_ctf_function
        /repo/gcc-trunk/gcc/dwarf2ctf.cc:853
0xe44b53 ctf_do_die(die_struct*)
        /repo/gcc-trunk/gcc/dwarf2ctf.cc:974
0xe99183 ctf_debug_do_cu
        /repo/gcc-trunk/gcc/dwarf2out.cc:33018
0xe99183 ctf_debug_do_cu
        /repo/gcc-trunk/gcc/dwarf2out.cc:33011
0xe99183 dwarf2out_early_finish
        /repo/gcc-trunk/gcc/dwarf2out.cc:33147
0xdf680f symbol_table::finalize_compilation_unit()
        /repo/gcc-trunk/gcc/cgraphunit.cc:2580
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.

$ aarch64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-9077-20240220001758-g52490278466-checking-yes-rtl-df-extra-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/14.0.1/lto-wrapper
Target: aarch64-unknown-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
--with-sysroot=/usr/aarch64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=aarch64-unknown-linux-gnu
--with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld
--with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-9077-20240220001758-g52490278466-checking-yes-rtl-df-extra-aarch64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.1 20240220 (experimental) (GCC)