From mboxrd@z Thu Jan  1 00:00:00 1970
From: Zhigang Gong <zhigang.gong@linux.intel.com>
Subject: Re: [Intel-gfx] Beignet crashes on vanilla 3.17.1 with
 IVB hardware
Date: Fri, 24 Oct 2014 17:13:03 +0800
Message-ID: <20141024091303.GC2987@ivb-gt2-rev4>
References: <CA+E=qVd613U6Shw5vqgFNJWyJEkknzZ=hpk5nGgdJacwCe3qPQ@mail.gmail.com>
 <20141024022720.GH13942@ivb-gt2-rev4>
 <20141024070509.GA2987@ivb-gt2-rev4>
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To: Vasily Khoruzhick <anarsoul@gmail.com>
Cc: intel-gfx@lists.freedesktop.org, "beignet@lists.freedesktop.org" <beignet@lists.freedesktop.org>
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Hi,

Luxmark (both 2.0/2.1) works fine on my IVB machine. The back trace
you provided below doesn't indicate it's a beignet related problem.
It hadn't enter beignet domain and just crashed in luxmark internal.

On Fri, Oct 24, 2014 at 12:04:29PM +0300, Vasily Khoruzhick wrote:
> Hi Zhigang,
> 
> Luxmark crashes with following backtrace:
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00000000004cd8b0 in slg::PathOCLRenderEngine::StopLockLess() ()
> (gdb) bt
> #0  0x00000000004cd8b0 in slg::PathOCLRenderEngine::StopLockLess() ()
> #1  0x0000000000482236 in slg::RenderEngine::Stop() ()
> #2  0x000000000047be9b in slg::RenderSession::~RenderSession() ()
> #3  0x0000000000468a77 in LuxMarkApp::Stop() ()
> #4  0x0000000000468b46 in LuxMarkApp::InitRendering(LuxMarkAppMode,
> char const*) ()

After a quick analysis, I confirm that the second case is indeed a beignet
bug. Beignet lacks of some llvm intrinsics support such as
llvm.uadd.with.overflow.i32().

Will fix it next week.

Thanks,
Zhigang Gong.

> 
> And convert from imagemagick crashes in libgbe.so:
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007fffeb0df18c in gbe::buildRegInfo(gbe::ir::BasicBlock&,
> gbe::vector<gbe::RegInfoForMov>&) () from /usr/lib/beignet//libgbe.so
> (gdb) bt
> #0  0x00007fffeb0df18c in gbe::buildRegInfo(gbe::ir::BasicBlock&,
> gbe::vector<gbe::RegInfoForMov>&) () from /usr/lib/beignet//libgbe.so
> #1  0x00007fffeb0e048d in
> gbe::GenWriter::removeLOADIs(gbe::ir::Liveness const&,
> gbe::ir::Function&) () from /usr/lib/beignet//libgbe.so
> #2  0x00007fffeb0fb823 in
> gbe::GenWriter::emitFunction(llvm::Function&) () from
> /usr/lib/beignet//libgbe.so
> #3  0x00007fffeb100b63 in