This time to the list too (sorry for double email)

Hi,

The original patch '[vect] Re-analyze all modes for epilogues', skipped 
modes that should not be skipped since it used the vector mode provided 
by autovectorize_vector_modes to derive the minimum VF required for it. 
However, those modes should only really be used to dictate vector size, 
so instead this patch looks for the mode in 'used_vector_modes' with the 
largest element size, and constructs a vector mode with the smae size as 
the current vector_modes[mode_i]. Since we are using the largest element 
size the NUNITs for this mode is the smallest possible VF required for 
an epilogue with this mode and should thus skip only the modes we are 
certain can not be used.

Passes bootstrap and regression on x86_64 and aarch64.

gcc/ChangeLog:

         PR 103997
         * tree-vect-loop.c (vect_analyze_loop): Fix mode skipping for 
epilogue
         vectorization.