https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80706
--- Comment #15 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Jakub Jelinek from comment #13) > Created attachment 41340 [details] > gcc8-pr80706.patch > > I came up with this (in addition to #c7). This removes one of the two > useless stores in the original pr71245-1.c testcase and restores the above > pr71245-1.c modification to what it used to look before (well, even better, > as it reserves smaller stack). The committed patch fixes unwanted matching by introducing specialized SSE load/store patterns. I don't think it is worth complicating sync.md any further, the stack slot is shared, and the patched compiler generates exactly the same assembly as before.
