On Fri, 23 Dec 2022, Jose E. Marchesi wrote:
> > (scheduling across calls in sched2 is somewhat dubious as well, but > > it doesn't risk register pressure issues, and on VLIW CPUs it at least > > can result in better VLIW packing) > > Does sched2 actually schedule across calls? All the comments in the > source code stress the fact that the second scheduler pass (after > register allocation) works in regions that correspond to basic blocks: > "(after reload, each region is of one block)". A call instruction does not end a basic block. (also, with -fsched2-use-superblocks sched2 works on regions like sched1) Alexander
