RFA (symtab): PATCH to symtab_node::nonzero_address DECL_COMDAT handling for c++/80485

[Jeff Law]

On 05/19/2018 07:07 AM, Jason Merrill wrote:
> A comment earlier in in nonzero_address says, "Important case of WEAK
> we want to do well are comdats. Those are handled by later check for
> definition."  But in this case we aren't handling this comdat function
> well, we return false because it is DECL_WEAK and DECL_EXTERNAL
> (because we aren't at EOF yet) and so we fail to fold the comparison.
> 
> This patch fixes the testcase by checking DECL_COMDAT directly.
> 
> Tested x86_64-pc-linux-gnu.  OK for trunk?
> 
> 
> 80485.diff
> 
> 
> commit a1a0c12db660aa94a625771a9f2fa9db30a552fe
> Author: Jason Merrill <jason@redhat.com>
> Date:   Fri May 18 20:20:05 2018 -0400
> 
>             PR c++/80485 - inline function non-zero address.
>     
>             * symtab.c (nonzero_address): Check DECL_COMDAT.
OK
jeff