Deprecate 32-bits HP-PA for GCC 4.8?

[Jeff Law]

On 05/07/2012 11:33 AM, Steven Bosscher wrote:
> Hello,
>
> GCC is well into stage 1 for GCC 4.8, but I haven't seen any proposals
> for targets to be deprecated. I have one I would like to put on the
> list, so here's something to start a discussion with:
>
> Deprecate all support for 32-bits HP-PA. This includes HP-UX10, and
> PA-7000 and older.
No objections from me.  PA1.x machines are ancient.   However, before 
making the decision, I think making sure your facts are correct would be 
wise.


>
> 3. The PA-7000 series only run HP-UX 10 or earlier, so support for
> HP-7000 and older is pointless without HP-UX10 support.
Does the PA linux port run on the older PA machines or did they restrict 
themselves to PA2.0 and newer?  I certainly recall them working on 32bit 
ports at one time.

>
> 4. 32-bits HP-PA uses the SOM binary object format, i.e. it is a
> non-ELF target (64-bits HP-PA is ELF).
Well, there was a PA ELF 32 bit target, but I suspect that code has long 
since died.

>
> Removing support for anything older than PA-8000 results in a
> considerable cleanup for the PA architecture: ~3300 lines out of
> ~23000, estimated by cleaning all "!TARGET_64BIT" and "TARGET_PA_11"
> patterns in pa.md and pa.c, and most of the cleanups to remove support
> for SOM objects.
IIRC TARGET_PA_11 was implicitly on when compiling 2.0 support.  Again, 
worth checking since it may affect how much code you think you can clean up.


Jeff