Hi,

On Wed, 23 Sep 2015, Richard Biener wrote:

> The issue we have with LTO is that the linemap gets populated in quite 
> random order and thus we repeatedly switch files (we've mitigated this 
> somewhat for GCC 5).

Yes.

> We also considered dropping column info (and would drop range info) as 
> diagnostics are from optimizers only with LTO and we keep locations 
> merely for debug info.

That would be the obvious mitigations, yes.  I do like the fact that we'd 
be able to do all this without enlarging location_t.


Ciao,
Micha.

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