https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82931
Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-01-15
Component|target |middle-end
Summary|Missing Optimization for |Missing Optimization for
|Bit-Transfer (AVR Target) |Bit-Transfer
Ever confirmed|0 |1
--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
As lined out in comment #3, this is a middle-end flaw in insn combine: For
merge1 it should use MEM as split-points. For merge2 it doesn't even recognize
that the expression is a bit-insertion.
