[AArch64] Fix -Wunused-variable in -DLLVM_ENABLE_ASSERTIONS=off builds after r366857

llvm-svn: 366866

diff --git a/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp b/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
index 606fdcb..892d469 100644 (file)
--- a/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
@@ -1572,6 +1572,7 @@ bool AArch64InstructionSelector::select(MachineInstr &I,
       assert(SrcRB.getID() == AArch64::FPRRegBankID &&
              DstRB.getID() == AArch64::FPRRegBankID &&
              "Wrong extract regbank!");
+      (void)SrcRB;
 
       // Emit the same code as a vector extract.
       // Offset must be a multiple of 64.