[Bug c++/115794] New: gcc 15 (20240630 snapshot) ICEs while building gfortran while targeting rv64gcv_zvl256b

[lu_zero at gentoo dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115794

            Bug ID: 115794
           Summary: gcc 15 (20240630 snapshot) ICEs while building
                    gfortran while targeting rv64gcv_zvl256b
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lu_zero at gentoo dot org
  Target Milestone: ---

Created attachment 58594
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58594&action=edit
-freport-bug of the problem

// gcc version 15.0.0 20240630 (experimental) (Gentoo 15.0.0_pre20240630 p4)
//
// during RTL pass: combine
//
/usr/riscv64-unknown-linux-gnu/tmp/portage/sys-devel/gcc-15.0.0_pre20240630/work/gcc-15-20240630/gcc/fortran/options.cc:
In function ‘bool gfc_handle_option(size_t, const char*, long int, int,
location_t, const cl_option_handlers*)’:
//
/usr/riscv64-unknown-linux-gnu/tmp/portage/sys-devel/gcc-15.0.0_pre20240630/work/gcc-15-20240630/gcc/fortran/options.cc:853:1:
internal compiler error: in smallest_mode_for_size, at stor-layout.cc:356
//   853 | }
//       | ^

See the attached log for all the details.