[ARM] Add uses for locals introduced for debug messages. NFC.

This adds uses for locals introduced for new debug messages for the load store optimizer. Those locals are only used on debug statements and otherwise create unused variable warnings.

Differential Revision: https://reviews.llvm.org/D94398

Author: Stephan Herhut

llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp

@@ -1511,6 +1511,7 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineInstr *MI) {
                    .addReg(MO.getReg(), (isLd ? getDefRegState(true)
                                               : getKillRegState(MO.isKill())))
                    .cloneMemRefs(*MI);
+    (void)MIB;
     LLVM_DEBUG(dbgs() << "  Added new instruction: " << *MIB);
   } else if (isLd) {
     if (isAM2) {
@@ -1524,6 +1525,7 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineInstr *MI) {
                 .addImm(Pred)
                 .addReg(PredReg)
                 .cloneMemRefs(*MI);
+        (void)MIB;
         LLVM_DEBUG(dbgs() << "  Added new instruction: " << *MIB);
       } else {
         int Imm = ARM_AM::getAM2Opc(AddSub, Bytes, ARM_AM::no_shift);
@@ -1535,6 +1537,7 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineInstr *MI) {
                 .addImm(Imm)
                 .add(predOps(Pred, PredReg))
                 .cloneMemRefs(*MI);
+        (void)MIB;
         LLVM_DEBUG(dbgs() << "  Added new instruction: " << *MIB);
       }
     } else {
@@ -1546,6 +1549,7 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineInstr *MI) {
               .addImm(Offset)
               .add(predOps(Pred, PredReg))
               .cloneMemRefs(*MI);
+      (void)MIB;
       LLVM_DEBUG(dbgs() << "  Added new instruction: " << *MIB);
     }
   } else {
@@ -1563,6 +1567,7 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineInstr *MI) {
                      .addImm(Imm)
                      .add(predOps(Pred, PredReg))
                      .cloneMemRefs(*MI);
+      (void)MIB;
       LLVM_DEBUG(dbgs() << "  Added new instruction: " << *MIB);
     } else {
       // t2STR_PRE, t2STR_POST
@@ -1572,6 +1577,7 @@ bool ARMLoadStoreOpt::MergeBaseUpdateLoadStore(MachineInstr *MI) {
                      .addImm(Offset)
                      .add(predOps(Pred, PredReg))
                      .cloneMemRefs(*MI);
+      (void)MIB;
       LLVM_DEBUG(dbgs() << "  Added new instruction: " << *MIB);
     }
   }