[llvm-dev] Working on FP SCEV Analysis

[Chandler Carruth via llvm-dev]

Adding Sanjoy Das as I think he will have lots of thoughts on this general
subject.

On Mon, May 16, 2016 at 6:29 AM Demikhovsky, Elena via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi,
>
> I’m working now on extending SCEV Analysis and adding FP support.
> At the beginning, I want to vectorize this loop:
>
> float fp_inc;
>
>   float x = init;
>   for (int i=0;i<N;i++){
>     A[i] = x;
>     x += fp_inc; // Loop invariant variable or constant
>   }
>
> In this loop “x” is a FP induction variable. But it is not the “primary”
> induction and loop trip count is still depends on integer induction “i”.
>
> In the future, I plan to work on “primary” FP inductions.
> Intel compiler vectorizes FP-induction loops, GCC does not.
>
> I wanted to hear that community does not have any principal objections for
> this work.
> Thank you.
>
>
>    - * Elena*
>
>
>
>
>
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