[PATCH] D18901: ARM: Use a callee save register for the swiftself parameter.

[Quentin Colombet via llvm-commits]

qcolombet added inline comments.

================
Comment at: lib/Target/ARM/ARMFrameLowering.cpp:914
@@ -925,1 +913,3 @@
+      bool isLiveIn = MF.getRegInfo().isLiveIn(Reg);
+      if (!isLiveIn)
         MBB.addLiveIn(Reg);
----------------
Because if the register is live we *must not* add it into the live-in.

================
Comment at: lib/Target/ARM/ARMFrameLowering.cpp:925
@@ -934,1 +924,3 @@
+      // passed in callee saved registers.
+      Regs.push_back(std::make_pair(Reg, /*isKill=*/!isLiveIn));
     }
----------------
Same comment as x86: conservatively correct.


Repository:
  rL LLVM

http://reviews.llvm.org/D18901