https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102306
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |segher at gcc dot gnu.org
--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #3)
> This should probably have been prevented in two different ways: 1) the
> volatile load and 2) the equal cost for a 2->2 combination.
No, it is equal cost, but fewer dependencies; it is lower latency. This is
how all costing in combine works.
1) of course *is* a problem.
