On Nov 13, 2012, at 11:14 AM, Eric Christopher <[email protected]> wrote:

> 
> 
> >
> I talked with Greg and he said that accel tables wouldn't work with LTO. The 
> problem is triggered even with `-gline-tables-only'. I don't have a small 
> testcase, but you need to build LLVM with LTO and `-gline-tables-only' then 
> run dwarfdump on it like I said.
> 
> 
> That's curious, did he give a reason?

I think it had to do with messed up debug info. Greg, could you explain a bit 
more?

> You can have an accelerator table for a final executable. That said the 
> accelerator tables make not sense for -gline-tables-only which could be 
> causing you the problems you're see since there's very little info for the 
> tables to work with and there could be issues there. There should be a DIE 
> for each entry in the names table. What do, for example, those offsets give 
> you?
>  
The offsets are bogus. I can't find them in the dwarfdump.

> > Do you have a particular set of output from the verify to show what's going 
> > on here?
> >
> These are the first several lines of the verify output. It's big.
> 
> Not surprising as it's pretty heinous debug info at this point. So, what are 
> the DIE offsets for those functions? llvm-dwarfdump doesn't dump them at the 
> moment so you'll need to use dwarfdump to look for the functions.
> 
I'll take a look after lunch. I might be able to reduce a testcase to look at...

-bw



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