[LLVMdev] slooow compiles

[John Regehr]

Unswitch loops is the culprit, I'm about to file a bug.

John


--
John Regehr, regehr at cs.utah.edu
Associate Professor, School of Computing, University of Utah
http://www.cs.utah.edu/~regehr/

On Mon, 19 Oct 2009, Dan Gohman wrote:

> My InlineCost refactoring has been noticed in this aspect; that may or may 
> notbe the culprit here.
>
> A quick thing you can do is to compile with -ftime-report and compare the top 
> few passes between versions.
>
> Dan
>
> On Oct 19, 2009, at 8:47 PM, John Regehr <regehr at cs.utah.edu> wrote:
>
>> As part of routine testing, I run clang and llvm-gcc a lot of times.
>> Something happened between r83681 and r84167 such that clang-cc and cc1
>> became many hundreds of times slower when asked to perform optimizations.
>> 
>> Is this a known issue?  These are all release builds on Ubuntu Jaunty on
>> x86.  During these long runs, memory usage creeps up slowly at maybe 1 MB
>> per minute.
>> 
>> Thanks,
>> 
>> John Regehr
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