https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85611
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2018-05-03
Version|tree-ssa |7.3.1
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So what do you expect? Elide the 2nd atomic load? We currently make no
attempt at "optimizing" atomics on GIMPLE. OTOH run2 shows we do sth on RTL -
ah, no.
The testcase is just incomplete enough that the control statement is dead and
the load is removed during RTL optimization.
