[PATCH] D52177: [InstCombine] Fold ~A - Min/Max(~A, O) -> Max/Min(A, ~O) - A

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

I think the fact that we're pretty register constrained is hurting my attempt at promoting to 32 bit. We only had 8 32-bit registers to start with. We lost one to the load pointer, one to the store pointer, one to the loop index, one to the stack pointer. One seems to be used by a loop around this one. So that left us 3 registers inside this loop to do the math with.


Repository:
  rL LLVM

https://reviews.llvm.org/D52177