Re: [wide-int] Make integer_onep return false for signed 1-bit bitfields

[Richard Sandiford]

Ping.

Richard Sandiford <rdsandif...@googlemail.com> writes:
> As discussed on gcc@, integer_onep is supposed to return false for
> a nonzero 1-bit value if the type is signed.
>
> Tested on x86_64-linux-gnu and powerpc64-linux-gnu.  OK to install?
>
> Thanks,
> Richard
>
>
> Index: gcc/tree.c
> ===================================================================
> --- gcc/tree.c        2013-10-29 19:19:27.623468618 +0000
> +++ gcc/tree.c        2013-11-02 17:25:06.499657501 +0000
> @@ -2092,7 +2092,7 @@ integer_onep (const_tree expr)
>    switch (TREE_CODE (expr))
>      {
>      case INTEGER_CST:
> -      return wi::eq_p (expr, 1);
> +      return wi::eq_p (wi::to_widest (expr), 1);
>      case COMPLEX_CST:
>        return (integer_onep (TREE_REALPART (expr))
>             && integer_zerop (TREE_IMAGPART (expr)));