Local variable only referenced in assert, causing opt build warnings

[shenhan]

Summary

This patch fixed the problem that a local variable is only referenced in "assert", which causes opt build warnings.

[shenhan]

Fixed in llvm/trunk@326592
Abandoned.

lib/Target/ARM/ThumbRegisterInfo.cpp

void ThumbRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
   MachineFunction &MF = *MBB.getParent();
   const ARMSubtarget &STI = MF.getSubtarget<ARMSubtarget>();
   if (!STI.isThumb1Only())
     return ARMBaseRegisterInfo::eliminateFrameIndex(II, SPAdj, FIOperandNum,
                                                     RS);
 
   unsigned VReg = 0;
   const ARMBaseInstrInfo &TII = *STI.getInstrInfo();
-  ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
   DebugLoc dl = MI.getDebugLoc();
   MachineInstrBuilder MIB(*MBB.getParent(), &MI);
 
   unsigned FrameReg;
   int FrameIndex = MI.getOperand(FIOperandNum).getIndex();
   const ARMFrameLowering *TFI = getFrameLowering(MF);
   int Offset = TFI->ResolveFrameIndexReference(MF, FrameIndex, FrameReg, SPAdj);
 
#endif // NDEBUG
   // Special handling of dbg_value instructions.
   if (MI.isDebugValue()) {
     MI.getOperand(FIOperandNum).  ChangeToRegister(FrameReg, false /*isDef*/);
     MI.getOperand(FIOperandNum+1).ChangeToImmediate(Offset);
     return;
   }
 
   // Modify MI as necessary to handle as much of 'Offset' as possible
-  assert(AFI->isThumbFunction() &&
+  assert(MF.getInfo<ARMFunctionInfo>()->isThumbFunction() &&
          "This eliminateFrameIndex only supports Thumb1!");
   if (rewriteFrameIndex(MI, FIOperandNum, FrameReg, Offset, TII))
     return;
 
   // If we get here, the immediate doesn't fit into the instruction.  We folded
   // as much as possible above, handle the rest, providing a register that is
   // SP+LargeImm.
   assert(Offset && "This code isn't needed if offset already handled!");