[Bug target/94614] New: [10 Regression] ICE in emit_move_multi_word, at expr.c:3716 since r10-416-g1bf2a0b90f2457f6d9301535560eb5e05978261b

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94614

            Bug ID: 94614
           Summary: [10 Regression] ICE in emit_move_multi_word, at
                    expr.c:3716 since
                    r10-416-g1bf2a0b90f2457f6d9301535560eb5e05978261b
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: arm-none-eabi-gcc,riscv64-linux-gnu

I see the following ICE

$ ./gcc/xgcc -Bgcc /home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/pr94574.c
-c -Og
during RTL pass: expand
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/pr94574.c: In function
‘foo’:
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/pr94574.c:13:18: internal
compiler error: in emit_move_multi_word, at expr.c:3716
   13 |   *(v4si *) &res = v;
      |   ~~~~~~~~~~~~~~~^~~
0xca66a2 emit_move_multi_word
        /home/marxin/Programming/gcc2/gcc/expr.c:3716
0xca6a56 emit_move_insn_1(rtx_def*, rtx_def*)
        /home/marxin/Programming/gcc2/gcc/expr.c:3791
0xca6cb1 emit_move_insn(rtx_def*, rtx_def*)
        /home/marxin/Programming/gcc2/gcc/expr.c:3850
0xc81b1a store_bit_field_1
        /home/marxin/Programming/gcc2/gcc/expmed.c:806
0xc835fa store_bit_field(rtx_def*, poly_int<1u, unsigned long>, poly_int<1u,
unsigned long>, poly_int<1u, unsigned long>, poly_int<1u, unsigned long>,
machine_mode, rtx_def*, bool)
        /home/marxin/Programming/gcc2/gcc/expmed.c:1172
0xcb408a store_field
        /home/marxin/Programming/gcc2/gcc/expr.c:7192
0xcabafc expand_assignment(tree_node*, tree_node*, bool)
        /home/marxin/Programming/gcc2/gcc/expr.c:5369
0xb25d0e expand_gimple_stmt_1
        /home/marxin/Programming/gcc2/gcc/cfgexpand.c:3749
0xb26107 expand_gimple_stmt
        /home/marxin/Programming/gcc2/gcc/cfgexpand.c:3847
0xb2e1d1 expand_gimple_basic_block
        /home/marxin/Programming/gcc2/gcc/cfgexpand.c:5887
0xb2fc15 execute
        /home/marxin/Programming/gcc2/gcc/cfgexpand.c:6542
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