>
> 2018-10-31 Richard Biener
>
> * dwarf2out.c (build_abbrev_table): Guard lookup_external_ref call
> with is_type_die.
As discussed on IRC, i have backported this to GCC 8 because it causes
noticeable slowness when building Firefox with debug info.
Honza
>
> Honza reports high CPU usage from lookup_external_ref at LTRANS time.
> This is likely because build_abbrev_table calls it on all DIEs
> rather than just type DIEs which we populate the ref table with.
> So we end up calling it for all the DIEs refering to early debug,
> possibly many distinct
