Re: [PATCH 29/31] PDP11: Use `const_double_zero' to express double zero constant

[Jeff Law via Gcc-patches]

On 11/19/20 8:36 PM, Maciej W. Rozycki wrote:
> We do not define a comparison operation between floating-point and
> integer data, including integer zero constant.  Consequently the RTL
> instruction stream presented to the post-reload comparison elimination
> pass will include, where applicable, floating-point comparison insns
> against `const_double:DF 0.0 [0x0.0p+0]' rather than `const_int 0 [0]',
> meaning that the latter expression will not match when used in machine
> description.
>
> Use `const_double_zero' then for the relevant patterns to match the
> intended RTL instructions.
>
>       gcc/
>       * config/pdp11/pdp11.md (fcc_cc, fcc_ccnz): Use
>       `const_double_zero' to express double zero constant.
OK
jeff