[Bug rtl-optimization/108892] New: [13 Regression] ICE: in curr_insn_transform, at lra-constraints.cc:4168 (unable to generate reloads for: {*mvconst_internal}) at -Og on riscv64

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108892

            Bug ID: 108892
           Summary: [13 Regression] ICE: in curr_insn_transform, at
                    lra-constraints.cc:4168 (unable to generate reloads
                    for: {*mvconst_internal}) at -Og on riscv64
           Product: gcc
           Version: 13.0
            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: riscv64-unknown-linux-gnu

Created attachment 54507
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54507&action=edit
reduced testcase

Compiler output:
$ riscv64-unknown-linux-gnu-gcc -Og testcase.c
testcase.c: In function 'foo':
testcase.c:23:1: error: unable to generate reloads for:
   23 | }
      | ^
(insn 122 117 127 2 (set (reg:DI 157 [ _46 ])
        (ior:DI (reg:DI 200)
            (reg:DI 251))) "testcase.c":14:5 177 {*mvconst_internal}
     (expr_list:REG_EQUIV (const_int 25769803782 [0x600000006])
        (nil)))
during RTL pass: reload
testcase.c:23:1: internal compiler error: in curr_insn_transform, at
lra-constraints.cc:4168
0x79094f _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /repo/gcc-trunk/gcc/rtl-error.cc:108
0x75103a curr_insn_transform
        /repo/gcc-trunk/gcc/lra-constraints.cc:4168
0xeca15b lra_constraints(bool)
        /repo/gcc-trunk/gcc/lra-constraints.cc:5215
0xeb18e4 lra(_IO_FILE*)
        /repo/gcc-trunk/gcc/lra.cc:2375
0xe62d09 do_reload
        /repo/gcc-trunk/gcc/ira.cc:5963
0xe62d09 execute
        /repo/gcc-trunk/gcc/ira.cc:6149
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.

$ riscv64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-riscv64/bin/riscv64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r13-6278-20230222135711-g3da77f217c8-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/13.0.1/lto-wrapper
Target: riscv64-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-isa-spec=2.2
--with-sysroot=/usr/riscv64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=riscv64-unknown-linux-gnu
--with-ld=/usr/bin/riscv64-unknown-linux-gnu-ld
--with-as=/usr/bin/riscv64-unknown-linux-gnu-as --disable-multilib
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r13-6278-20230222135711-g3da77f217c8-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.0.1 20230222 (experimental) (GCC)