[llvm] r339122 - [DebugInfo] Reduce debug_str_offsets section size

[Pavel Labath via llvm-commits]

On 28/08/18 02:08, David Blaikie wrote:
> Any idea if there's work to add str_index support to the name tables?
> 
> I guess the idea is that it's more efficient to have one fewer
> indirections for strings, and worth the cost in duplicate
> relocations/bytes/etc? *shrug*

Interesting question. I am not aware of anyone looking at this. I
suppose that would trade a bit of performance for a bit of size (but
only for the intermediate .o file and only when using split-dwarf),
though I can't estimate how big would those "bits" be.


>     +; Produced with "clang -S -emit-llvm -gdwarf-5" from source "int
>     X;", copied
>     +; three times and modified by hand.
> 
> 
> Could you describe in the comment what modifications were necessary?

The modifications consisted of tweaking the variable names (DW_AT_name)
and the compilation directory (DW_AT_comp_dir) to trigger the inserting
of strings in different order.

I'll update the comment to reflect that.

pl