[LLVMdev] Hitting assertion, unsure why

[Villmow, Micah]

Ok, I've had time to track this down a little bit more and I seem to
have found another case where it fails. This is occurring during
Schedulur->EmitSchedule() in SelectionDAGISel.cpp:695. The problem seems
to be that somehow the CopyToReg part of the switch statement in
ScheduleDAG::EmitNode has a FrameIndex as its second operand. This is
especially problematic because the code is either expecting a
VirtualRegister or a RegisterSDNode in this location. I've checked all
locations where I use the DAG.getCopyToReg function and none of them
pass in a frameindex. I explcitily check that I have a register before
passing in the value to Register number to CopyToReg, so this leads me
to believe that it is being generated somehow by LLVM. 

In the case I sent earlier in this thread it only occurs when I turn
optimizations on, but the new case I hit with optimizations off but
through a different method. 

I've tried the strip-debug method and that doesn't seem to help, any
other ideas or tips where I can look to further debug this issue would
be very helpful.

Thanks,
Micah




-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
On Behalf Of Bill Wendling
Sent: Thursday, January 15, 2009 3:32 PM
To: LLVM Developers Mailing List
Subject: Re: [LLVMdev] Hitting assertion, unsure why

Other than not using debugging ('-g' and the like), not really. :-( I
think that Devang is actively working on fixing this, though. It might
not be too much longer.

-bw

On Thu, Jan 15, 2009 at 3:26 PM, Villmow, Micah <Micah.Villmow at amd.com>
wrote:
> This did not seem to work, any other ideas?
>
> Thanks,
>
> -----Original Message-----
> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
> On Behalf Of Bill Wendling
> Sent: Thursday, January 15, 2009 2:26 PM
> To: LLVM Developers Mailing List
> Subject: Re: [LLVMdev] Hitting assertion, unsure why
>
> Don't generate debug info at this time (you can use "opt
> -strip-debug")? :-) Otherwise, I'm not sure.
>
> -bw
>
> On Thu, Jan 15, 2009 at 2:20 PM, Villmow, Micah
<Micah.Villmow at amd.com>
> wrote:
>> Is there any known method/hack of bypassing this?
>>
>> Thanks,
>>
>> -----Original Message-----
>> From: llvmdev-bounces at cs.uiuc.edu
[mailto:llvmdev-bounces at cs.uiuc.edu]
>> On Behalf Of Bill Wendling
>> Sent: Thursday, January 15, 2009 2:07 PM
>> To: LLVM Developers Mailing List
>> Subject: Re: [LLVMdev] Hitting assertion, unsure why
>>
>> On Thu, Jan 15, 2009 at 1:54 PM, Villmow, Micah
> <Micah.Villmow at amd.com>
>> wrote:
>>> I am hitting this assertion:
>>>
>>> assert(I != VRBaseMap.end() && "Node emitted out of order - late");
>>>
>>> I am not sure why this assertion is being triggered or what I
changed
>> that
>>> is causing it.
>>>
>>> This is asserting when SDValue is FrameIndexSDNode 1.
>>>
>>> I don't have any code that modified frameindices until my overloaded
>>> RegisterInfo function.
>>>
>>> I've attached the bc file. If I generate an unoptimized bc file then
>> there
>>> is no issue, only when I turn optimizations on do I hit this
problem.
>>>
>> I got this too. It's related to debug information being in flux right
>> now. I believe that Devang is working on a fix for this right now.
>>
>> -bw
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