[Bug c/106030] New: ice in emit_move_insn, at expr.cc:4026

["dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106030

            Bug ID: 106030
           Summary: ice in emit_move_insn, at expr.cc:4026
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

For this C code:

int safe_mul_func_int8_t_s_s_si2, g_7014, g_11941_l_12290;
char(safe_mul_func_uint8_t_u_u)(ui1, ui2) { return ui1 * ui2; }
void g_11941() {
  char __trans_tmp_1 =
      (safe_mul_func_uint8_t_u_u <= g_7014) * safe_mul_func_int8_t_s_s_si2;
  g_11941_l_12290 = safe_mul_func_uint8_t_u_u(2 != g_11941, __trans_tmp_1);
}

can be compiled like this:

$ /home/dcb/gcc/results/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results/bin/gcc
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results.20220617/libexec/gcc/arm-linux-gnueabihf/13.0.0/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../trunk/configure --prefix=/home/dcb/gcc/results.20220617
--disable-bootstrap --disable-multilib --disable-werror
--with-pkgversion=1d6044c250e3badf --enable-checking=yes
--enable-languages=c,c++ --with-cpu=cortex-a72 --with-fpu=neon-fp-armv8
--with-float=hard --build=arm-linux-gnueabihf --host=arm-linux-gnueabihf
--target=arm-linux-gnueabihf
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 13.0.0 20220617 (experimental) (1d6044c250e3badf) 
$ /home/dcb/gcc/results/bin/gcc -c  -w q.i
$

but switch on -O1 and this happens:

$ /home/dcb/gcc/results/bin/gcc -c  -w -O1 q.i 
during RTL pass: expand
q.i: In function 'g_11941':
q.i:6:19: internal compiler error: in emit_move_insn, at expr.cc:4026
    6 |   g_11941_l_12290 = safe_mul_func_uint8_t_u_u(2 != g_11941,
__trans_tmp_
1);
      |  
~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~
0x551897 emit_move_insn(rtx_def*, rtx_def*)
        /home/dcb/gcc/working/gcc/../../trunk/gcc/expr.cc:4025
0x54608f expand_and(machine_mode, rtx_def*, rtx_def*, rtx_def*)
        /home/dcb/gcc/working/gcc/../../trunk/gcc/expmed.cc:5482