[llvm-dev] LoopVectorize - determine the bounds of the original loop (original) (raw)

Sanjoy Das via llvm-dev llvm-dev at lists.llvm.org
Sat Aug 19 13:21:32 PDT 2017

Hi Alex,

Did you take a look at ScalarEvolution::getBackedgeTakenCount() ?

-- Sanjoy

On Wed, Aug 16, 2017 at 6:27 AM, Alex Susu via llvm-dev <llvm-dev at lists.llvm.org> wrote:

Hello. Is there an easy way to obtain in the LoopVectorize module the upper and lower bounds of the loop being vectorized - I wasn't really able to find in the original code of LoopVectorize code calculating these bounds, although I know this module quite well and I am wondering if maybe they are already computed. (I put a similar question at http://lists.llvm.org/pipermail/llvm-dev/2016-August/103988.html ) .

I have to admit I don't know well the ScalarEvolution class but I think I can also use ScalarEvolution's getUnsignedRangeMax() and getUnsignedRangeMin(), but these are newer methods added to ScalarEvolution in the last months and I normally work on an older LLVM trunk. Any help would be appreciated. Thank you, Alex

LLVM Developers mailing list llvm-dev at lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

More information about the llvm-dev mailing list