Displaying 2 results from an estimated 2 matches for "918af5b8".
2013 Oct 14
0
[LLVMdev] Vectorization of pointer PHI nodes
On 14 October 2013 18:15, Nadav Rotem <nrotem at apple.com> wrote:
> 1. We have 4 stores to consecutive locations, but the last element is the
> constant zero, and not an additional SUB. At the moment we don’t have
> support for idempotence operations, but this is something that we should
> add.
>
The fourth write is not necessary for GCC to vectorize it (nor was in the
2013 Oct 14
4
[LLVMdev] Vectorization of pointer PHI nodes
This is almost ideal for SLP vectorization, except for two problems:
1. We have 4 stores to consecutive locations, but the last element is the constant zero, and not an additional SUB. At the moment we don’t have support for idempotence operations, but this is something that we should add.
2. The values that we are subtracting come from 3 loads. We usually load 4 elements from memory, or