[InstrInfo] Refactor foldOperandImpl to thread through InsertPt. NFC

Summary:
This was a longstanding FIXME and is a necessary precursor to cases
where foldOperandImpl may have to create more than one instruction
(e.g. to constrain a register class). This is the split out NFC changes from
D6262.

Reviewers: pete, ributzka, uweigand, mcrosier

Reviewed By: mcrosier

Subscribers: mcrosier, ted, llvm-commits

Differential Revision: http://reviews.llvm.org/D10174

llvm-svn: 239336
diff --git a/llvm/lib/Target/R600/AMDGPUInstrInfo.h b/llvm/lib/Target/R600/AMDGPUInstrInfo.h
index 07042b5..8fd27a1 100644
--- a/llvm/lib/Target/R600/AMDGPUInstrInfo.h
+++ b/llvm/lib/Target/R600/AMDGPUInstrInfo.h
@@ -87,9 +87,11 @@
 protected:
   MachineInstr *foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
                                       ArrayRef<unsigned> Ops,
+                                      MachineBasicBlock::iterator InsertPt,
                                       int FrameIndex) const override;
   MachineInstr *foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
                                       ArrayRef<unsigned> Ops,
+                                      MachineBasicBlock::iterator InsertPt,
                                       MachineInstr *LoadMI) const override;
 
 public: