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Re: [Manta] Compile issues


Chronological Thread 
  • From: Ingo Wald <wald@sci.utah.edu>
  • To: Abe Stephens <abe@sci.utah.edu>
  • Cc: Christian Odom <cnsodom@gmail.com>, MANTA <manta@sci.utah.edu>
  • Subject: Re: [Manta] Compile issues
  • Date: Thu, 23 Aug 2007 15:02:26 -0600
Not sure if it's the same compiler version, but at least "back then" when I last played with icc on IA64, the compiler always died as soon as you has a a reference to an sse-type (__m128 &).

Cheers,

Ingo



Abe Stephens wrote:

It is clear that no one has built in IA64 for quite some time:
The problem in CPUTime.cc (appearing in both icc and gcc) is due to non-portable assembly code being used. I'm not sure where CPUTime is used, possibly in the deadline image traverser. I also discovered compilation problems in TesselatedCylinder (vla/pod error) and other new code.

It appears that some code in RayPacket.h causes the IA64 icc to segfault. It appears to be SSE related as the files compile if SSE is disabled. This might take some time to track down (by enabling MANTA_SSE and then explicitly disabling it for different sections of the header).

I'd like very much for Manta to continue to build on Altix/SSE, but I don't have a large number of free cycles right now to find the offending code. It's likely that there is some intrinsic which is causing the issue and could be inclosed in a #if __ia64__ block.
If you could help isolate where it is, I will certainly help fix it where it occurs.

Abe

On Aug 23, 2007, at 12:47 PM, Christian Odom wrote:



On 8/23/07, *Abe Stephens* <abe@sci.utah.edu <mailto:abe@sci.utah.edu>> wrote:


    Which source file causes the icc internal error? It looks like
    icpc 9.0 segfaults when compiling CheapRNG.cc. (Unfortunately I
don't have icc ia64 10.0 here...)
Here is the output from make->
//////////////////////////////////////////////////////////////////////////////
[ 13%] Building CXX object Core/CMakeFiles/Manta_Core.dir/Math/CheapRNG.o
(0): internal error: backend signals

compilation aborted for /store/toolkit/Manta/Core/Math/CheapRNG.cc (code 4)
make[2]: *** [Core/CMakeFiles/Manta_Core.dir/Math/CheapRNG.o] Error 4
make[1]: *** [Core/CMakeFiles/Manta_Core.dir/all] Error 2
make: *** [all] Error 2
//////////////////////////////////////////////////////////////////////////////
It still seems to be CheapRNG

    The gcc problem is certainly fixable by using separate code on
    IA64.  Back in the day icc was much, much faster than gcc--I'd
    imagine that is still the case today. Let's try to figure out
    what code is causing problems with icc before switching to gcc.

    Abe

    On Aug 23, 2007, at 12:10 PM, Christian Odom wrote:

    Hi guys

    Im running into a couple of compile errors on our ia64 platforms
    when trying to compile  Rev: 1678.

    With icc 10.0 we are still getting the dreaded->
    (0):  internal error: backend signals
    
//////////////////////////////////////////////////////////////////////////////


    When using gcc 4.1.2 Im getting this mess->

    /store/toolkit/Manta/Core/Util/CPUTime.cc: In static member
    function `static
    long long unsigned int Manta::CPUTime::currentTicks()':
    /store/toolkit/Manta/Core/Util/CPUTime.cc:90: error: impossible
    register
    constraint in `asm'
    /store/toolkit/Manta/Core/Util/CPUTime.cc:90: error: impossible
    register
    constraint in `asm'
    /store/toolkit/Manta/Core/Util/CPUTime.cc:90: error: impossible
    register
    constraint in `asm'
    /store/toolkit/Manta/Core/Util/CPUTime.cc:93: error:
    unrecognizable insn:
    (insn 28 40 55 2 0x2000000001631860 (parallel [
    (set (reg:SI 2 r2)
    (asm_operands/v:SI ("rdtsc") ("=a") 0 []
    [] ("/store/toolkit/Manta/Core/Util/CPUTime.cc") 90))
    (set (reg:SI 15 r15)
    (asm_operands/v:SI ("rdtsc") ("=d") 1 []
    [] ("/store/toolkit/Manta/Core/Util/CPUTime.cc") 90))
    ]) -1 (insn_list:REG_DEP_ANTI 15 (insn_list 14 (insn_list 12
    (insn_list 10 (insn_list 20 (nil))))))
    (nil))
    /store/toolkit/Manta/Core/Util/CPUTime.cc:93: confused by
    earlier errors, bailing out
    gmake[2]: *** [Core/CMakeFiles/Manta_Core.dir/Util/CPUTime.o]
    Error 1
    gmake[1]: *** [Core/CMakeFiles/Manta_Core.dir/all] Error 2
    gmake: *** [all] Error 2
    
//////////////////////////////////////////////////////////////////////////////

    I dont know if there is any hope for the icc compiler, but any
    thoughts on the gcc issue would be awesome.
-- Christian Odom
    Graduate Student
    Center for Advanced Computer Studies
    http://www.cacs.louisiana.edu ;<http://www.cacs.louisiana.edu>
    Louisiana Immersive Technologies Enterprise
    http://www.lite3d.com





--
Christian Odom
Graduate Student
Center for Advanced Computer Studies
http://www.cacs.louisiana.edu
Louisiana Immersive Technologies Enterprise
http://www.lite3d.com






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