[LLVMdev] DFAPacketizer with StateTrans != 0 Assertion

[Ivan Llopard]

Hi sam,

On 12/06/2012 17:30, sam wrote:
> Hi Ivan,
>
> The assertion was happening because I wasn't checking after the first 
> attempt failed. The first packet was failing and so it was ended, and 
> then the packetizer attempted to add it to the next packet without 
> checking for available resources. However this highlights probably the 
> real problem - my packetizer is unable to find resources for the first 
> instruction, or any of my instructions for that matter. Have you ever 
> seen this problem before?

No. AFAIK, the DFA expects the instruction to have well defined 
itinerary with its resource utilisation. Does your first instruction 
have an defined itinerary?

Ivan

>
> thanks
> sam
>
> On 12/06/12 15:48, Ivan Llopard [via LLVM] wrote:
>> Hi Sam,
>>
>> On 12/06/2012 15:33, sam wrote:
>> > Hi,
>> >
>> > I'm trying to get the DFAPacketizer to work for my target but with any
>> > instruction I get the
>> > 'Assertion `CachedTable.count(StateTrans) != 0' failed' error and 
>> it crashes
>> > out before packeting a single instruction.
>>
>> Do you reserve some resource without verification?
>>
>> Note that reserveResources() should be called iff canReserveResources()
>> is true (the call order is important here) even for the trivial case (0
>> instructions in the packet). See VLIWPacketizerList as an example on how
>> to use the API's.
>>
>> Ivan
>>
>> >
>> > I have a *GenDFAPacketizer.inc file and my packetizer pass checks 
>> that the
>> > table is not empty before proceeding. I also have a schedule file 
>> with my
>> > functional units and itineraries listed. Can anyone think of what I 
>> may have
>> > missed to cause this error?
>> >
>> > Cheers,
>> > sam
>> >
>> > --
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> Assertion 
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