https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86010
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-06-01
CC| |law at gcc dot gnu.org
Known to work| |4.8.5
Target Milestone|--- |7.4
Summary|[7/8 Regression] redundant |[7/8/9 Regression]
|memset with smaller size |redundant memset with
|not eliminated |smaller size not eliminated
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is the new byte-tracking in DSE I presume which isn't able to prune
optimally (off-by-one?) or do the better thing, namely removing the
later memset instead of the earlier. With GCC 4.8 we managed to combine
the memsets at the RTL level.
