Displaying 1 result from an estimated 1 matches for "b5d7bd37".
2017 Nov 14
2
RFC: [X86] Introducing command line options to prefer narrower vector instructions even when wider instructions are available
I haven't looked into actually implementing revectorization, so we may just
want to ignore that possibility for now.
But I imagined that revectorization could hit the same problem that we're
trying to avoid here: if the cost models say that wider vectors are legal
and cheaper, but the reality is that perf will suffer when using those
wider vectors, then we want to avoid using the wider