[Mesa-dev] [PIGLIT,radeonsi] crash in spec/glsl-1.50/execution/geometry/max-input-components – who's bug is it?

[Tom Stellard]

On Wed, Apr 16, 2014 at 02:36:19PM +0200, Kai Wasserbäch wrote:
> Michel Dänzer schrieb am 15.04.2014 09:27:
> > On 23.03.2014 04:53, Kai Wasserbäch wrote:
> >> Dear Mesa devs,
> >> I'm not sure whether this is a bug in Mesa, LLVM or in eglibc. The crash happens
> >> in _int_malloc, but since that is certainly one of the more often used
> >> functions, I'm not yet convinced, the fault lies indeed with eglibc.
> >>
> >> Therefore I'm attaching the full backtrace of the crash in
> >> spec/glsl-1.50/execution/geometry/max-input-components (it takes a very long
> >> time until the crash actually happens, Piglit recorded an execution time of
> >> 1538.0506579875946) and hope you can point me to the right bug tracker.
> >>
> >> I'm unable to tell, whether this is a regression or not, since today was the
> >> first time I was able to run a full Piglit quick test, without crashing my X on
> >> this machine with the radeonsi.
> > 
> > It's not a regression. If you build LLVM with assertions enabled, you get:
> > 
> > shader_runner:
> > /home/daenzer/src/llvm-git/llvm/lib/CodeGen/RegAllocGreedy.cpp:2268:
> > unsigned int
> > {anonymous}::RAGreedy::selectOrSplitImpl(llvm::LiveInterval&,
> > llvm::SmallVectorImpl<unsigned int>&,
> > {anonymous}::RAGreedy::SmallVirtRegSet&, unsigned int): Assertion
> > `NewVRegs.empty() && "Cannot append to existing NewVRegs"' failed.
> > 
> > So this is an LLVM issue. It might be worth testing if Tom's register
> > spilling patches help.
> 
> Can you point me to those patches? Preferrably as a branch, but ML is ok as well.
> 

Here is the branch: http://cgit.freedesktop.org/~tstellar/llvm/log/?h=si-spill-fixes

-Tom

> Thanks,
> Kai
> 
> P.S.: Sorry for not coming back with a Valgrind log, but after waiting for
> almost twelve hours I killed the job and didn't have time to start a new one.
> 
> 
> 
> -- 
> 
> Kai Wasserbäch (Kai Wasserbaech)
> 
> E-Mail: kai at dev.carbon-project.org
> 



> _______________________________________________
> mesa-dev mailing list
> mesa-dev at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/mesa-dev