[Bug tree-optimization/87621] outer loop auto-vectorization fails for exponentiation code

[hoganmeier at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87621

--- Comment #3 from krux <hoganmeier at gmail dot com> ---
Yes see the godbolt link.
clang compiles it down to a few vpmulld's.