[Bug tree-optimization/81635] [8 Regression] nvptx SLP test cases regressions

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81635

--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #4)
> Looking at the x86_64 example, the difference between the signed and
> unsigned case happens here in split_constant_offset_1:

Same thing for nvptx.