llvm dev - Oct 2011 - [LLVMdev] How to make Polly ignore some non-affine memory accesses

Strange , with --enable-shared (I use auto tool by the way ...) it gives:

MacBook-Pro-di-Marcello:examples Kariddi$ ./compile_ex.sh not_so_simple_loop
clang (LLVM option parsing): Unknown command line argument
'-enable-polly-viewer'.  Try: 'clang (LLVM option parsing)
-help'
clang (LLVM option parsing): Did you mean '-enable-polly-vector'?

Seems like it doesn't compile the viewer option ...

2011/10/24 Marcello Maggioni <hayarms at
gmail.com>:
> It works!! :)
>
> I'll try also enable-shared , to see if it's possible to use it
> without the patch and report
>
> 2011/10/24 Tobias Grosser <tobias at grosser.es>:
>> On 10/23/2011 02:31 PM, Tobias Grosser wrote:
>>>
>>> On 10/22/2011 08:41 AM, Marcello Maggioni wrote:
>>
>> [..]
>>>>
>>>> Seems like it tries to load a symbol that it doesn't find
...
>>>> I have synchronized all clang/llvm/polly to the latest version
and I
>>>> compiled them all together. Loading polly with "opt"
works strangely
>>>> ... :
>>>>
>>>> opt -S -load ${PATH_TO_POLLY_LIB}/LLVMPolly.dylib -mem2reg
-no-aa
>>>> -targetlibinfo -tbaa -basicaa -preverify -domtree -verify
-mem2reg
>>>> -instcombine -simplifycfg -tailcallelim -simplifycfg
-reassociate
>>>> -domtree -loops -loop-simplify -lcssa -loop-rotate -instcombine
>>>> -scalar-evolution -loop-simplify -lcssa -indvars -polly-prepare
>>>> -postdomtree -domfrontier -regions -polly-region-simplify
>>>> -scalar-evolution -loop-simplify -lcssa -indvars -postdomtree
>>>> -domfrontier -regions  -loop-simplify -indvars
 -enable-iv-rewrite
>>>> not_so_simple_loop.s
>>>>
>>>> strange ...
>>>
>>> Very strange. I have seen such problems previously and they were
often
>>> related to enabling rtti (runtime type info) or exceptions in
Polly, but
>>> no clang or the other way around. I am not sure if this is the case
her.
>>>
>>> Another possibility is that clang does not use the RegionInfo stuff
and
>>> it gets dead code eliminated.
>>
>> I am even more convinced this is the case. Can you try the attached
patch
>> and report if it works for you?
>>
>> Cheers
>> Tobi
>>
>

Perfect, thank you very much :)

2011/10/26 Tobias Grosser <tobias at grosser.es>:
> On 10/24/2011 11:32 PM, Marcello Maggioni wrote:
>>
>> Strange , with --enable-shared (I use auto tool by the way ...) it
gives:
>>
>> MacBook-Pro-di-Marcello:examples Kariddi$ ./compile_ex.sh
>> not_so_simple_loop
>> clang (LLVM option parsing): Unknown command line argument
>> '-enable-polly-viewer'.  Try: 'clang (LLVM option parsing)
-help'
>> clang (LLVM option parsing): Did you mean
'-enable-polly-vector'?
>>
>> Seems like it doesn't compile the viewer option ...
>
> This error message is because the option name was changed. Try -polly-show.
>
> Furthermore, I plan to commit the change to clang, that solves the failure
> when loading clang. Though it will probably take a day until it gets
through
> review.
>
> Cheers
> Tobi
>