[Bug target/43892] PowerPC suboptimal "add with carry" optimization

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43892

--- Comment #21 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Mainine (will be GCC 5 in a few months).

There is no addcc thing, that is not suitable for PowerPC.
The big changes are in though (and they are much bigger than
I originally thought, fwiw -- scope creep ;-) )