> On Mon, Oct 21, 2019 at 9:18 AM Hans Wennborg via cfe-commits > <cfe-commits@lists.llvm.org> wrote: >> >> As expected, this broke the Chromium build again (but it seems only at >> -Oz this time). > > > To be clear, is the desired behavior that the vectorization is performed even > at -Oz? I suspect that it is, but I just want to confirm.
I'm not the author, so I'm not sure. It could also be that the desired behaviour was "if vectorizing, use 4-element vectors". But from what I understand, the desired behaviour of the pragma is exactly that, to turn force enable vectorization. Actually, reading http://clang.llvm.org/docs/LanguageExtensions.html#extensions-for-loop-hint-optimizations, I don't find support for this new behaviour, but maybe that's written somewhere else. _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
