[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.cpp b/llvm/lib/Target/R600/AMDGPUInstrInfo.cpp
index f0f10ca..64e295f 100644
--- a/llvm/lib/Target/R600/AMDGPUInstrInfo.cpp
+++ b/llvm/lib/Target/R600/AMDGPUInstrInfo.cpp
@@ -152,17 +152,15 @@
   return true;
 }
 
-MachineInstr *AMDGPUInstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
-                                                     MachineInstr *MI,
-                                                     ArrayRef<unsigned> Ops,
-                                                     int FrameIndex) const {
+MachineInstr *AMDGPUInstrInfo::foldMemoryOperandImpl(
+    MachineFunction &MF, MachineInstr *MI, ArrayRef<unsigned> Ops,
+    MachineBasicBlock::iterator InsertPt, int FrameIndex) const {
 // TODO: Implement this function
   return nullptr;
 }
-MachineInstr *
-AMDGPUInstrInfo::foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
-                                       ArrayRef<unsigned> Ops,
-                                       MachineInstr *LoadMI) const {
+MachineInstr *AMDGPUInstrInfo::foldMemoryOperandImpl(
+    MachineFunction &MF, MachineInstr *MI, ArrayRef<unsigned> Ops,
+    MachineBasicBlock::iterator InsertPt, MachineInstr *LoadMI) const {
   // TODO: Implement this function
   return nullptr;
 }