On Sat, Jan 14, 2017 at 03:51:27AM -0600, Segher Boessenkool wrote: > It also prevents combine from combining any instruction into an existing > doloop insn (resulting in a doloop insn again). This isn't too serious, > almost always this is just a register copy that will be optimised away > some other way.
Right. I forgot to mention, I looked at all of gcc/*.o before/after the patch and saw no occurrences of any missed combines. Just the expected changes in rs6000.o, various insn-*.o from twiddling rs6000.md, and one constant change in read-rtl-function.o. -- Alan Modra Australia Development Lab, IBM
