[PATCH] D14928: [PostRA scheduling] Allow a subtarget to do scheduling when it wants post RA

[Jonas Paulsson via llvm-commits]

jonpa added a comment.

True that those passes could be moved, but I am thinking that there is also the SystemZLongBranch pass. It can split compare&branch instructions, which would then give room for scheduler to put the compare into an empty slot somewhere if possible. (This pass can not be moved before block placement, of course.)

This may or may not be important (perhaps in some loop?), but it couldn't hurt. Considering the comment I quoted before from Passes.cpp, it seems that also others may like to try this.


http://reviews.llvm.org/D14928