[Bug tree-optimization/113281] [11/12/13 Regression] Latent wrong code due to vectorization of shift reduction and missing promotions since r9-1590

[rdapp at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113281

--- Comment #29 from Robin Dapp <rdapp at gcc dot gnu.org> ---
Just to document again:  The test case should not be vectorized and at some
point we will adjust the cost model so it is not going to be.  I'd prefer to
base that decision on real uarchs rather than adjust the generic cost model
right away though.