[cfe-commits] r167799 - /cfe/trunk/lib/Driver/Tools.cpp

[Eric Christopher]

On Tue, Nov 13, 2012 at 10:28 AM, Bill Wendling <isanbard at gmail.com> wrote:

> On Nov 13, 2012, at 10:03 AM, Eric Christopher <echristo at gmail.com> wrote:
>
> On Mon, Nov 12, 2012 at 4:54 PM, Bill Wendling <isanbard at gmail.com> wrote:
>
>> Author: void
>> Date: Mon Nov 12 18:54:24 2012
>> New Revision: 167799
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=167799&view=rev
>> Log:
>> Disable accelerator tables when compiling with LTO.
>>
>> LTO doesn't generate correct accelerator tables. This is due to the
>> general lack
>> correct of debug info for LTO. Disable it when using LTO.
>> <rdar://problem/12401423>
>>
>>
> Not a huge fan of this patch. Debug Info for LTO in general isn't working
> yet, what's the difference between this and anything else? What kind of
> configuration are you building with that this is occurring? What tool is
> breaking?
>
> If we build LLVM in LTO mode  and then run dtrace on the executable, it
> will eat all of your memory and fill up your hard drive because of bad
> debug info resulting from bad accelerator tables.
>
>
dtrace uses the accelerator tables? How and why? The accelerator tables are
built from the debug info that's going into the final file, I think you're
conflating two problems here.

-eric
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