Re: [PATCH] vect: Try smaller vector size when SLP split fails

2020-08-05 Thread Richard Biener via Gcc-patches
On Wed, Aug 5, 2020 at 3:30 PM Andrew Stubbs wrote: > > This patch improves SLP performance in combination with some patches I > have in development to add multiple vector sizes to amdgcn. > > The problem is that amdgcn's preferred vector size has 64 lanes, and SLP > does not support lane masking.

[PATCH] vect: Try smaller vector size when SLP split fails

2020-08-05 Thread Andrew Stubbs
This patch improves SLP performance in combination with some patches I have in development to add multiple vector sizes to amdgcn. The problem is that amdgcn's preferred vector size has 64 lanes, and SLP does not support lane masking. My patches will add smaller vector sizes (32, 16, 8, 4, 2)