[Bug tree-optimization/113576] [14 regression] 502.gcc_r hangs r14-8223-g1c1853a70f9422169190e65e568dcccbce02d95c

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113576

--- Comment #28 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
I saw we already maskoff integral modes for vector mask in store_constructor

        /* Use sign-extension for uniform boolean vectors with
           integer modes and single-bit mask entries.
           Effectively "vec_duplicate" for bitmasks.  */
        if (elt_size == 1
            && !TREE_SIDE_EFFECTS (exp)
            && VECTOR_BOOLEAN_TYPE_P (type)
            && SCALAR_INT_MODE_P (TYPE_MODE (type))
            && (elt = uniform_vector_p (exp))
            && !VECTOR_TYPE_P (TREE_TYPE (elt)))
          {
            rtx op0 = force_reg (TYPE_MODE (TREE_TYPE (elt)),
                                 expand_normal (elt));
            rtx tmp = gen_reg_rtx (mode);
            convert_move (tmp, op0, 0);

            /* Ensure no excess bits are set.
               GCN needs this for nunits < 64.
               x86 needs this for nunits < 8.  */
            auto nunits = TYPE_VECTOR_SUBPARTS (type).to_constant ();
            if (maybe_ne (GET_MODE_PRECISION (mode), nunits))
              tmp = expand_binop (mode, and_optab, tmp,
                                  GEN_INT ((1 << nunits) - 1), target,
                                  true, OPTAB_WIDEN);
            if (tmp != target)
              emit_move_insn (target, tmp);
            break;
          }