llvm-project

e4414a4b - [LV][doc] Update and extend the docs on floating-point reduction vectorization (#172809)

[LV][doc] Update and extend the docs on floating-point reduction vectorization (#172809) The docs for reduction vectorization currently say that > We support floating point reduction operations when -ffast-math is used. This is outdated, as there are now cases where floating-point reductions are vectorized even without -ffast-math, through ordered reduction. This PR updates the documentation for reduction vectorization, noting that that AArch64 and RISC-V default to ordered FP reductions being permitted. Furthermore, an explanation of why the vectorization of FP reduction is such a special case is added to the docs. --------- Co-authored-by: GYT <tiborgyri@gmail.com> Co-authored-by: Florian Hahn <flo@fhahn.com>