Pristine Register Semantics

This is just a short heads-up for out-of-tree targets relying on the concept of pristine registers. I slightly changed their semantics in r238524 (see http://reviews.llvm.org/D10101 for details). If you happened to not use the RegisterScavenger to get liveness past the PrologueEpilogue inserted and relied on MachineFrameInfo::getPristineRegs() without at same time relying on the machine basic blocks live-in sets then you may be affected by it.

  • Matthias