On Wed, Jul 25, 2012 at 4:25 PM, Allan Sandfeld Jensen <carew...@gmail.com> wrote: > On Wednesday 25 July 2012, Richard Guenther wrote: >> On Wed, Jul 25, 2012 at 2:23 PM, Allan Sandfeld Jensen >> >> <carew...@gmail.com> wrote: >> > Hi, >> > >> > I have been experimenting with marking specific functions to be auto- >> > vectorized in GCC, but have had problems getting it to work. >> > >> > It seems the optimize attribute works sometimes, but only if the function >> > it is used on is not static, but pragma optimize never seems to work. >> > >> > See the attached test-case. If you compile it with >> > -ftree-vectorizer-verbose, you will see that only the first function is >> > vectorized, but the two last are not. >> > >> > Anyone know what is wrong here? >> >> The attribute doesn't work in the face of inlining and generally was >> designed for debugging, not for controlling things like you do. >> > > In that case the GCC manual should probably be updated to reflect that. If > what you say it true, it seems it has been developed for one purpose but then > documented for another. (The documentation needs updating anyway, since the > attribute is no longer allowed after the function declaration like all the > examples does, but only before). > > I found the problem with pragma though, it is apparently a long standing bug > in PR 48026 and a related version in PR 41201. The last bug actually has a > patch for the problem, it is apparently caused by an incorrect short-cut.
CCing the original author. Richard. > `Allan
