[PowerPC] Avoid unused variable warning in Release builds

PPCFrameLowering.cpp:632:8: warning: unused variable 'isAIXABI' [-Wunused-variable]

Author: d0k

llvm/lib/Target/PowerPC/PPCFrameLowering.cpp

@@ -39,15 +39,6 @@ EnablePEVectorSpills("ppc-enable-pe-vector-spills",
                      cl::desc("Enable spills in prologue to vector registers."),
                      cl::init(false), cl::Hidden);
 
-/// VRRegNo - Map from a numbered VR register to its enum value.
-///
-static const MCPhysReg VRRegNo[] = {
- PPC::V0 , PPC::V1 , PPC::V2 , PPC::V3 , PPC::V4 , PPC::V5 , PPC::V6 , PPC::V7 ,
- PPC::V8 , PPC::V9 , PPC::V10, PPC::V11, PPC::V12, PPC::V13, PPC::V14, PPC::V15,
- PPC::V16, PPC::V17, PPC::V18, PPC::V19, PPC::V20, PPC::V21, PPC::V22, PPC::V23,
- PPC::V24, PPC::V25, PPC::V26, PPC::V27, PPC::V28, PPC::V29, PPC::V30, PPC::V31
-};
-
 static unsigned computeReturnSaveOffset(const PPCSubtarget &STI) {
   if (STI.isAIXABI())
     return STI.isPPC64() ? 16 : 8;
@@ -629,9 +620,8 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF,
   bool isPPC64 = Subtarget.isPPC64();
   // Get the ABI.
   bool isSVR4ABI = Subtarget.isSVR4ABI();
-  bool isAIXABI = Subtarget.isAIXABI();
   bool isELFv2ABI = Subtarget.isELFv2ABI();
-  assert((isSVR4ABI || isAIXABI) && "Unsupported PPC ABI.");
+  assert((isSVR4ABI || Subtarget.isAIXABI()) && "Unsupported PPC ABI.");
 
   // Work out frame sizes.
   unsigned FrameSize = determineFrameLayoutAndUpdate(MF);