[PATCH] D46232: [SystemZ, IPRA] determineCalleeSaves must always add return register and DP.

[Ulrich Weigand via Phabricator via llvm-commits]

uweigand added a comment.

But we do not want to force use of a frame pointer, in general this just reduces performance for no reason on Z.   Some functions require a frame pointer (those that do dynamic allocas), but most do not.


https://reviews.llvm.org/D46232