[Bug target/112481] [14 Regression] RISCV: ICE: Segmentation fault when compiling pr110817-3.c

[ams at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112481

--- Comment #7 from Andrew Stubbs <ams at gcc dot gnu.org> ---
Simply changing to OPTAB_WIDEN solves the ICE, but I don't know if it does so
in a sensible way, for RISC V.

@@ -7489,7 +7489,7 @@ store_constructor (tree exp, rtx target, int cleared,
poly_int64 size,
            if (maybe_ne (GET_MODE_PRECISION (mode), nunits))
              tmp = expand_binop (mode, and_optab, tmp,
                                  GEN_INT ((1 << nunits) - 1), target,
-                                 true, OPTAB_DIRECT);
+                                 true, OPTAB_WIDEN);
            if (tmp != target)
              emit_move_insn (target, tmp);
            break;

Here are the instructions it generates:

(set (reg:DI 165)
    (and:DI (subreg:DI (reg:SI 164) 0)
        (const_int 1 [0x1])))
(set (reg:SI 154)
    (subreg:SI (reg:DI 165) 0))

Should I use that patch? I think it's harmless on targets where OPTAB_DIRECT
would work.