[LLVMdev] The one remaining bug keeping CellSPU from release...

Scott Michel
Wed, 17 Oct 2007 04:06:34 -0000

Evan:

What you requested was in the debug output (sans offending Node), but
here it is, outside of the attachment. The offending node is
highlighted:

SU(0): 0xa908760: ch = EntryToken
SU(1): 0xa907600: i32,ch,flag = CopyFromReg 0xa9095d0, 0xa9070e0,
0xa9095d0:1
     0xa906e30: ch,flag = CopyToReg 0xa908760, 0xa9070e0, 0xa9071f0
<<--<<--<<--<<--<< Node
     0xa9095d0: ch,flag = inlineasm 0xa906e30, 0xa908570, 0xa908c60,
0xa9070e0, 0xa9075a0, 0xa9070e0, 0xa906e30:1
SU(2): 0xa909560: ch = CopyToReg 0xa907600:1, 0xa909500, 0xa907600
SU(3): 0xa907ff0: ch = BRZ 0xa907600, 0xa906f10, 0xa909560

0xa906e30: ch,flag = CopyToReg 0xa908760, 0xa9070e0, 0xa9071f0


-scooter

On Oct 16, 2007, at 12:00 AM, Evan Cheng wrote:

> This is a scheduler assertion. It means a value (virtual register) use
> is somehow scheduled before its definition.
>
> Please run llc in gdb. Call dumpSchedule() to print out the schedule.
> Also please let me know which node it is processing at the time of the
> assertion.
>
> Evan
>
> On Oct 15, 2007, at 11:48 PM, Scott Michel <scottm at aero.org>
wrote:
>
>> Yup, I've got one remaining bug that holding up the CellSPU
release.
>> It still has a bunch of warts, but so long as I can get it into
>> shape such that llvm-gcc-4.2 compiles all the way through, then we
>> collectively have something with which to work.
>>
>> I'm getting the following error from llc, the attachments have
llc's
>> debug and the .ll files, respectively. Can anyone shed some light on
>> what I should look at to track this one down?
>>
>> /Users/scottm/play/llvm/branches/llvm-spu/lib/CodeGen/SelectionDAG/
>> ScheduleDAG.cpp:406: failed assertion `I != VRBaseMap.end() &&
"Node
>> emitted out of order - late"'
>>
>>
>> -scooter
>>
>> <crtbegin.debug>
>> <testcase.ll>
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