llvm dev - Aug 2013 - [LLVMdev] pbqp register allocator-need help

Hello Sir,

Im trying to test run pbqp register allocator for small C programs.

by

llc -regalloc=pbqp -debug <bitcode of the file>

It is giving me segmentation fault for even very simple programs having
loops or if statements.
Please tell me where I'm going wrong.


-- 
Regards,
Smriti Jaiswal
MTech
Dept of Computer Science and Engg,
IIT Kanpur
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On Sun, Aug 11, 2013 at 12:36 AM, Smriti Jaiswal
<jaiswal.smriti at gmail.com>wrote:
> Hello Sir,
>
> Im trying to test run pbqp register allocator for small C programs.
>
> by
>
> llc -regalloc=pbqp -debug <bitcode of the file>
>
> It is giving me segmentation fault for even very simple programs having
> loops or if statements.
> Please tell me where I'm going wrong.
>
Could you provide a specific example file (preferably a particularly simple
one) that reproduces this problem? (along with the exact command line)

if you can repro this crash with C source and Clang, the Clang crash
reporting mechanisms (it will provide a .sh and .i file & instruct you to
attach those files to a bug report) are quite handy when reporting bugs.
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The simple C code on which im running the allocator is attached.
And these are the set of commands. I dont understand ..guess i might be
doing something very silly.
Please help

*Commands:*

clang -emit-llvm -c test.c -o test.bc
opt -mem2reg test.bc -o testssa.bc
llc -regalloc=pbqp testssa.bc


On Mon, Aug 12, 2013 at 7:59 AM, David Blaikie <dblaikie at gmail.com>
wrote:
>
>
>
> On Sun, Aug 11, 2013 at 12:36 AM, Smriti Jaiswal <jaiswal.smriti at
gmail.com
> > wrote:
>
>> Hello Sir,
>>
>> Im trying to test run pbqp register allocator for small C programs.
>>
>> by
>>
>> llc -regalloc=pbqp -debug <bitcode of the file>
>>
>> It is giving me segmentation fault for even very simple programs having
>> loops or if statements.
>> Please tell me where I'm going wrong.
>>
>
> Could you provide a specific example file (preferably a particularly
> simple one) that reproduces this problem? (along with the exact command
> line)
>
> if you can repro this crash with C source and Clang, the Clang crash
> reporting mechanisms (it will provide a .sh and .i file & instruct you
to
> attach those files to a bug report) are quite handy when reporting bugs.
>


-- 
Regards,
Smriti Jaiswal
MTech
Dept of Computer Science and Engg,
IIT Kanpur
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