[Bug tree-optimization/40073] Vector short/char shifts generate sub-optimal code

[amylaar at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40073

Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |amylaar at gcc dot gnu.org

--- Comment #11 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> ---
Created attachment 45079
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45079&action=edit
testcase using restricted shift count

Even if the shift count is restricted in range by applying an AND first, which
also further boosts the optimization potential for SHIFT_COUNT_TRUNCATED
targets, the code is not vectorized.