https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71414
--- Comment #10 from rguenther at suse dot de <rguenther at suse dot de> --- On June 10, 2016 5:22:39 PM GMT+02:00, "jamborm at gcc dot gnu.org" <gcc-bugzi...@gcc.gnu.org> wrote: >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71414 > >--- Comment #9 from Martin Jambor <jamborm at gcc dot gnu.org> --- >(In reply to Richard Biener from comment #5) >> An interesting observation is that we clone sum32 for IPA-CP of n == >1024 but >> for some unknown reason figure Alignment of 'a' as unusable: > >The function sum32 is not static, so it can be called from outside of >the current compilation unit with any alignment. IPA-CP does not >clone for alignment, which was my deliberate decision because I found >it very difficult to reason about its profitability (I am opened to >suggestions in this area, of course). It ends up cloning for the constant second arg though so I'd have expected the alignment to be set on the first... >Make it static or compile with -flto and you will get: > >IPA lattices after all propagation: > >Lattices: > Node: main/35: > Node: sum32/34: > param [0]: VARIABLE > ctxs: VARIABLE > Alignment 64, misalignment 0 > AGGS VARIABLE >param [1]: 1024 [from: 35(99000)] [loc_time: 0, loc_size: 0, prop_time: >0, >prop_size: >0] > ctxs: VARIABLE > Alignment unusable (BOTTOM) > AGGS VARIABLE
