On Wed, May 03, 2017 at 06:18:08PM +0200, Jan Hubicka wrote:
> Hi,
> my change to sreals makes GCC to be miscompiled with GCC 4.1 and -O0. This is
> related to fact that using sreal implies a non-trivial constructor and thus
> ggc_cleared_alloc is no longer standard compliant. I however do not quite
> understand
> why GCC 4.1 manages to misoptimize this code but I have checked that this
> helps
> to fix the issue and hopefully will re-start our periodic testers.
Is store-merging pass able to optimize that back into reasonable code
(sure, not into ggc_cleared_alloc)?
Jakub
