[PATCH] D18900: New pre-isel pass SystemZBRCTLoops

[Ulrich Weigand via llvm-commits]

uweigand added a comment.

Can you explain why we need this new intrinsic (int_s390_hwloop_count)?   I can understand why the PowerPC code needs intrinsics, since it has to access the special CTR register.  But on SystemZ we don't have any special registers for BRCT, so why the intrinsic?


http://reviews.llvm.org/D18900