[Bug middle-end/32398] [4.3 Regression] checking for suffix of object files... configure: error: cannot compute suffix of f object files: cannot compile

["zadeck at naturalbridge dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #11 from zadeck at naturalbridge dot com  2007-07-08 00:57 -------
Subject: Re:  [4.3 Regression] checking for suffix of
 object files... configure: error: cannot compute suffix of f object files:
 cannot compile

dave at hiauly1 dot hia dot nrc dot ca wrote:
> ------- Comment #10 from dave at hiauly1 dot hia dot nrc dot ca  2007-07-07 23:30 -------
> Subject: Re:  [4.3 Regression] checking for suffix of object files...
> configure: error: cannot compute suffix of f obje
>
>   
>> suggest a way that we could accommodate this?
>>     
>
> Prior to reload being completed, I don't see that it matters whether
> the argument pointer is fixed or not.  See df_get_entry_block_def_set().
> After reload, I believe that we also need to mark the register in
> entry_block_defs.
>   
Why can't you put something in the prologue that sets the reg and has an
unspec as the lhs to make this reg live?  I thought that the purpose of
the unspecs was to be used in this manner since the unspec does not have
actually map to any real insns.
> There may be refinements to this depending on whether the argument
> pointer is used or not.  This might improve register allocation.
> The argument pointer is always copied when it isn't fixed.  See
> default_internal_arg_pointer().
>
> For now, I would suggest being conservative.  For example, we aren't
> fussy as to whether argument registers are actually used or not.
>
> Dave
>
>
>   


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32398