[PATCH] D17294: Fix for PR 26500

[Nemanja Ivanovic via llvm-commits]

nemanjai updated this revision to Diff 48536.
nemanjai added a comment.

Finally cleaned up the logic in findScratchRegister. Now it will try its best to find two unique registers. If it can, it sets both (if the pointers are passes) and returns true. If it can find only one, it will set both to that and return true if only one is required or false if two are required. Finally, if it can't find any free registers, it will return false and set both to R0 if the pointers are passed.

The condition that determines whether two registers are needed is now in a separate function which is queried both in canUseAsPrologue and emitPrologue.


Repository:
  rL LLVM

http://reviews.llvm.org/D17294

Files:
  lib/Target/PowerPC/PPCFrameLowering.cpp
  lib/Target/PowerPC/PPCFrameLowering.h

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