[PATCH] optimize handle_COMDAT

[Alan Modra]

On Tue, Apr 25, 2023 at 06:48:11PM +0200, Oleg Tolmatcev via Binutils wrote:
> Hello all,
> 
> linking with ld on Windows is currently slow. RPCS3 with BUILD_LLVM=ON
> takes 9 minutes to link on my PC and I am talking about the last step
> only. I have profiled `ld` with a profiler and optimized the code.
> With all the patches the linking only takes 1 min. now.
> 
> This is the first patch of the series of 4 patches. Should I submit
> all at once or wait until this one is accepted before I send the next
> one?

Best get this one accepted first, because it has problems.

> diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h

You shouldn't be editing bfd-in2.h.  It is a generated file, your
changes will disappear.

> @@ -6822,6 +6822,15 @@ struct bfd
> 
>    /* For input BFDs, the build ID, if the object has one. */
>    const struct bfd_build_id *build_id;
> +  htab_t flags_hash;
> +};

Also, since flags_hash is specific to PE, it doesn't belong in
struct bfd.  I think it should instead be put into struct pe_tdata,
see libcoff-in.h.

> diff --git a/bfd/opncls.c b/bfd/opncls.c

Your opncls.c changes don't belong there either.  Likely peicode.h is
the correct place.

-- 
Alan Modra
Australia Development Lab, IBM