[Bug target/95018] [10/11 Regression] Excessive unrolling for Fortran library array handling
rguenth at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed May 13 10:14:31 GMT 2020
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95018
--- Comment #32 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note I don't think the unrolling is excessive - store motion then applying
to all count[] and all computations hoisted out of the loop may be a bit
too much for register pressure though, especially since we're using
flag-based store-motion. But it causes the stores to be materialized
on all exits of the loop which means we end up with N*N conditional stores :/
I guess SM could be improved here.
More information about the Gcc-bugs
mailing list